Tooling for testing the strength of seat headrest guide sleeves

Tooling for testing the strength of the seat headrest guide sleeve

Technical field
The utility model concerns the technical field of test equipment, in particular a tool strength test of seat headrest guide sleeve working clothes.

Prior art
It is known that in most existing vehicle seat structures, the headrest of the seat is arranged on the headrest rod, and the rod headrest is connected to the headrest guide sleeve. the seat frame is provided with a headrest conduit, and the headrest guide sleeve is plugged and fitted into the headrest conduit. In order to offer good protection to people, the head restraint must be able to withstand a certain pressure. For this reason, it is necessary to test the strength of the headrest guide sleeve.
At present, the downward resistance test of the headrest guide sleeve ismainly carried out in the laboratory using pressure equipment to test the state equipment of the whole chair, that is, the whole seat is tested in the laboratory through pressure equipment large-scale pressure.

However, these detection methods currently have some shortcomings, that is, they cannot first meet the actual production cycle of the factory, and the production requirements allow inspection of each batch to determine the status of the product, whether or not it is qualified for use in production, and the laboratory must carry out the detection. It took about 1 hour to adjust the angle of the test equipment and assemble the seat several times. The inspection process and follow-up work took 1 hour. The whole process could not meet the actual production needs of the manufacturing plant. Second, the investment was significant and the inspection was not practical, and great pressure was necessary. The equipment to test the products requires an investment of around €800,000 in pressure equipment and control systems, and each test must invest in the seat assembly for stress testing; third, jet occupies a large area, and the general press equipment covers an area of ​​about 15 square meters, a set of control systems covers an area of ​​about 2 square meters; Fourth, labor intensity is high, personnel investment is high, and testing costs are high. The inspection process requires two people to operate, and the laboratory needs two people to coordinate debugging equipment and seating to complete the inspection each time. , which takes about 2 hours each time.

Content of the utility model
With this in mind, the utility model aims to propose a tool for testing the resistance of the seat headrest guide sleeve, so as to easily and quickly detect the seats of different models The downward resistance of the headrest guide sleeve meets the actual factory production needs.

In order to achieve the above objective, the technical solution of the utility model is realized as follows:
A tool for testing the strength of the guide sleeve of the seat ill\' support, the tool comprises a support, a detection force application element A and a cage for positioning the guide sleeve of the head restraint, the retaining device being connected to the support, the application element detection force being connected to the support and rotatable around the headrest. connection point, and detection application. The force member includes a sensing force arm that supports a sensing force, and the sensing force applying member cocarries a force application force arm which applies pressure to a headrest post on the headrest guide sleeve positioned on the bracket.

Compared to the prior art, in the seat headrest guide sleeve strength test tooling described in the utility model, since the force applying member of sensing can rotate about its point of connection with the support, and the sensing force application element comprises the sensing arm which supports the sensing force and the force arm which applies pressure to the rod of the headrest on the position of the headrest guide sleeved on the cage. In this way, based on the principles of torque and leverage balancing, based on this connection point, F1*L1 can be used = F2*L2, where F1 is the sensing force acting on the arm of detection, L1 is the distance from the F1 action of the detection arm to the connection point, and similarly,F2 is the pressure exerted by the force arm on the headrest rod, L2 For the distance from the action point F2 of the force arm to the connection point, it is assumed that the The guide sleeve of the headrest must withstand the force of F2. In this way, the detection force F1 that should be applied can be calculated, so that seat headrests of different models can be detected easily and quickly. The downward resistance of the guide ring meets the actual production needs of the factory.

In addition, the restraint device can adjust the height position relative to the support in the direction of the height of the seat.
In addition, one of the support and the cage is formed by a connection hole, and the other is formed by a plurality of positioning holes arranged at intervals in the direction of the height of the seat . The cage It can be adjusted in the direction of the height of the seat so that the positioning holes and troConnections of different heights can be aligned and locked by pins.
In addition, the distance between the positioning holes is configured to be the same as the distance between the gear slots on the headrest rod.
In addition, the cage is fixedly provided with a headrest guide tube for assembling and positioning the headrest guide sleeve to be inspected.
Furthermore, the detection force application element comprises a long part forming the detection force arm and a short part forming the force application arm, and the long part and the short part form an acute angle at one end. installed and connected to the support at the mutual connections.

Furthermore, the force application arm is formed with a suitable recess to cooperate with the headrest rod.
Furthermore, the bracket includes a first plate and a second plate which are parallel spaced and connectedby a plurality of connecting rods. Opposing first axes are respectively formed on the first plate and the second plate. sleeve and second sleeve; the detection force application element is provided with a rotating shaft, the detection force application element is located between the first plate member and the second plate member, and the two ends of the rotating shaft are respectively connected to the first bush and the second bush are matched in rotation; the cage comprises a first straight plate and a second straight plate spaced parallel to each other, and the first straight plate and the second straight plate are fixedly connected to each other for positioning. As for the connecting plate of the headrest guide sleeve, the first straight plate is fixedly connected to the first plate member, and the second straight plate is fixedly connected to the second plate member.
Moreover,a headrest conduit is fixedly provided on the connecting plate.
Other features and advantages of the present invention will be described in detail in the following detailed description.

Detailed Embodiments
It should be noted that, as long as there is no conflict, the embodiments and features of the embodiments of the present invention may be combined with each other.
The utility model will be described in detail below with reference to the drawings and embodiments.
As shown in Figure 1-3, the utility model The tooling 1 used to detect the resistance of the guide ring of the seat headrest includes a support 2, an application element detection force 3 and a cage 5. The cage 5 is used to position the guide bush of the headrest 4 to be tested. The headrest guide sleeve 4 A headrest rod 8 is inserted onto the headrest rodheadrest 8. A plurality of axially spaced headrest gear slots can be formed on the side rod body of the headrest rod 8. In this way, through different gear slots of the headrest and the headrest guide sleeve 4. Pressure adjustment can realize the adjustment of the headrest in different gears. The cage 5 is connected to the support 2. For example, it can be fixedly connected to the support 2. The sensor force application member 3 is connected to the support 2 and can go around the connection point 6 Turn, the sensing force applying member 3 has a sensing force arm 7 which supports the sensing force and a force applying arm 9 which applies pressure to the headrest rod 8 on the headrest guide sleeve 4 positioned on the cage 5. When the sensing force arm 7 receives the sensing force, it can drive the force applying membere detection 3 to rotate around the connection point 6, so that the force application arm 9 simultaneously applies pressure to the headrest rod 8 to confirm whether the headrest guide sleeve 4 meets the required resistance.

In this technical solution of the present invention, the detection force application element 3 can rotate around the connection point 6 with the support 2, and the detection force application element detection 3 has a detection force arm that can resist the detection force. 7 and the force arm 9 which exerts pressure on the headrest rod 8 on the headrest guide bush 4 positioned on the cage 5. In this way, as shown in Figure 3, on the basis of the principles of torque and leverage balance, depending on the connection point 6, you can use F1*L1 = F2*L2, where F1 is the sensing force acting on the sensing arm 7, L1 is the distance between the point of actionF1 on the sensing arm 7 and the connection point 6, and similarly, F2 is the force arm 9. The pressure L2 applied on the headrest rod 8 is the distance from the action point F2 on the force arm 9 and the connection point. Therefore, when an inspection is required, only the headrest guide 4 with the headrest rod 8 that needs to be inspected is positioned in the cage. 5, at this point, it is assumed that the headrest guide bush 4 must withstand the force of F2. In this way, the detection force F1 that needs to be applied can be calculated, so that the downward force of the headrest guide rings of different seat models can be detected easily and quickly. , to meet the actual production needs of the factory, without using the entire seat for inspection like the existing technology.

In addition, to improve versatility and meet the resistance detection of ringsseat headrest guide ring of different models, preferably, the utility model is used to detect the resistance of the seat headrest guide ring. , the retaining device 5 is configured to be able to adjust its position in height relative to the support 2 in the direction of the height of the seat.

The position in height of the cage 5 with respect to the support 2 can be adjusted thanks to various structures. For example, in a preferred structure, a connection hole is formed on one of the support 2 and the cage 5 to 10. The other is formed with a plurality of positioning holes.11 arranged at intervals in the direction of the height of the seat. For example, as shown in Figure 1, the support 2 is formed by connection holes 10, and the cage 5 is formed by positioning holes. 11. In this way, the cage 5 can be adjusted in the direction of the height of the seat to align the positioning holes 11 and the connecting holes 10 at differentyour heights and lock the positioning through pins such as pins or pins.

Furthermore, as shown in Figures 1 and 2, the hole spacing between the positioning holes 11 is configured to be the same as the slot spacing between the gear slots 25 on the headrest rod 8, so as to produce the headrest guide sleeve 4 of the same model. Detection requirements for different speed setting levels.

In addition, in order to be able to simulate the actual working conditions of the headrest guide sleeve 4 to more accurately detect the resistance of the headrest guide sleeve 4, preferably, As shown in Figure 1, the cage 5 is fixed. A conduit 12 for assembling and positioning the headrest guide sleeve 4 to be detected is provided, so that the headrest guide sleeve 4 can be inserted into the headrest duct 12 to detect more accuratein conditions close to actual working conditions the resistance of the headrest guide sleeve 4.

In addition, when detecting the force exerted by the application element of force 3, in order to facilitate better contact between the force arm applying the force 9 and the headrest rod 8, so as to transmit the pressure applied to the guide sleeve of the headrest 4. Preferably , as shown in Figures 1 and 2, the force arm 9 is formed with a concave part 15 adapted to cooperate with the rod of the headrest 8, that is to say the external peripheral surface of the rod of the headrest. 8 will form a peripheral surface adapted to the concave part 15, to obtain a more stable transmission of force.

Furthermore, it can be understood that based on F1*L1 = F2*L2, the application of sensing force meThe element 3 of the present invention can have various structural forms, e.g. , in a structurepreferred, in order to facilitate the transmission of the force and to facilitate the detection of the operator, as shown in figures 1 and 2, the element of application of force of detection 3 comprises an elongated part 13 forming the detection arm 7 and a short part 14 forming the force arm 9, the elongated part 13 and the short part 14 can be formed integrally, and the long part 13 and the short part 14 are arranged at an acute angle. angle at one end, and are connected to the support 2 at mutual connections. In this way, since the moment arm of the elongated portion 13 is longer, it is more convenient for the operator to apply force.

Furthermore, a force application point is formed at the far end of the sensing force arm 7, i.e., the elongated portion 13, so as to allow the operator to apply the detection force more precisely.

In a specific structure, the consumptionThe 2includes a first plate 17 and a second plate 18 which are parallel at intervals and connected by a plurality of connecting rods 16, and the first plate 17 and the second plate 18 have the structure shown in Fig. 1 respectively, and the first plate 17 and the second plate 18 are respectively formed with first shaft sleeves 19 and opposing second shaft sleeves 20; and the detection force application element 3 is provided with the rotating shaft 21, for example, is provided with the rotating shaft 21 at the junction of the elongated part 13 and the short part 14, and the detection force application element 3 is located between the first plate 17 and the second plate 18 and the two ends of the rotating shaft 21 are respectively connected to the second plate 18. A sleeve 19 and a second sleeve 20 are rotated and adapted to form a connection point 6; the cage 5 comprises a first straight plate 22 and a second straight plate23 which are parallel to each other, and between the first straight plate elements 22 and the second straight plate 23 There is a connection plate 24 for positioning the guide sleeve of the headrest 4. The first straight plate 22 is connected by fixed manner to the first plate 17. The second straight plate 23 is fixedly connected to the second plate 18. In addition, the first plate 17 and the second plate 18 are formed with connection holes 10, and the first straight plate 22 and the second straight plate 23. Positioning holes 11 are formed on the top, so that the height positions of the first straight plate 22 and the second straight plate 23 can be adjusted relative to the first plate 17 and the second straight plate 23. second plate 18 at the same time.

In addition, as mentioned above, in this specific structure, as shown in Figure 1, the headrest conduit 12 is fixedly arranged on the connection plate 24, and the co platenconnection 24 can imitate the skeleton of the seat to provide a mounting base for the headrest conduit 12.

Thus, in tooling with a specific structure of the In the present utility model, the detection strength of the headrest guide sleeve of a certain type of vehicle is as follows:
1. Pass the sensing force application member 3 through the rotating shaft 21 cooperates with the first socket 19 and the second socket 20 and is rotatably connected to the bracket 2 to basically form the main body of the tool inspection;
2. The factory inspector first selects the headrest to be inspected. The guide sleeve 4 is installed in the headrest conduit 12, and then the corresponding headrest rod 8 of this model is plugged into the headrest guide sleeve 4 to simulate the state of the finished headrest and select the gear to be measured and lock it, then the assembled part matches the holepositioning pin 11 on the cage 5 and the connection hole on the bracket 2 and adjusts the position of the corresponding hole, and fixes it with four pins, which can ensure that the measuring position can be detected without changing its position;

3. After confirming when assembling the sample in the tested state, the testing personnel applies the converted force value F1 to the measuring point of the test force arm 7 through a push force meter -portable pull, and can quickly obtain the down force of the tested headrest guide sleeve whether it meets the actual needs.
In this way, tooling 1 simulates the condition of the entire chair, transforms the test items into routine inspection items, meets the factory mass production, has a simple structure and is easy to use.
The foregoing is only a preferred embodiment of the utility model and is not intended to limit the utility model. Any modificationation, equivalent replacement, improvement, etc. in the spirit and principle of the utility model, must all be included within the scope of protection of this utility model.

Learn more about:Car Seat Headrest Strength Testing Machine

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