Knob testing machine

Abstract

The utility model discloses a knob testing machine in the technical field of knob detection, and aims to solve the problem of test accuracy of the conventional knob testing device. The device comprises a linear mechanism of a first mounting rack, a second mounting rack, a rotating mechanism on the second mounting rack and a measuring table, a driving assembly in the linear mechanism drives the sliding plate to linearly reciprocate on the first mounting frame; a rotating shaft in the rotating mechanism is rotationally connected with the second mounting frame, a gear at the lower shaft end is meshed with a rack on the sliding plate, a positioning column of a circular truncated cone at the upper shaft end limits a limiting groove of the follow-up rotating disc, and the width of the limiting groove is larger than the diameter of the positioning column; a limiting column on the clamping sleeve is arranged in a limiting hole of the follow-up turntable; a knob to be measured is fixed on the measuring table; the knob part is arranged on the clamping sleeve through the measuring table; a plurality of clamping screws penetrate through the clamping sleeve in the radial direction to be jointly matched with a clamping knob. The method is suitable for detecting the service life of the knob, and can improve the accuracy of service life detection and judgment.

Description

Technical Field

[0001] The utility model relates to a knob testing machine and belongs to the technical field of knob detection. Background Art

[0002] The rotary test of the knob is performed using a rotary device. When the number of rotations in the test meets the preset number of rotations, it is proved that the production quality of the knob meets the requirements. However, due to the structure of the existing rotary test device, the knob will be affected by the large radial force of the rotary test device during the test, resulting in inaccurate measurement results of the knob's life or damage to the knob due to rotation force. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a knob testing machine, which can reduce the radial force on the knob to be tested during the test, thereby improving the accuracy of judging the rotation life of the knob.

[0004] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0005] The utility model provides a knob testing machine, comprising a linear mechanism, a rotating mechanism and a second mounting frame arranged on a first mounting frame; a measuring platform is arranged on the second mounting frame;

[0006] The linear mechanism comprises a sliding plate and a driving assembly; the upper end surface of the sliding plate is provided with a rack; the lower end surface is slidably connected to the first mounting frame; the driving assembly is fixed to the first mounting frame, and is used to drive the sliding plate to reciprocate linearly;

[0007] The rotating mechanism includes a rotating shaft, a follower turntable and a clamping sleeve; the shaft body of the rotating shaft is rotatably connected to the second mounting frame, the gear arranged at the lower shaft end is meshed with the rack, and a round table is fixed to the upper shaft end; the limiting groove opened on the follower turntable penetrates into the positioning column on the round table for limiting, and the width of the limiting groove is greater than the diameter of the positioning column; the limiting column arranged at the bottom of the clamping sleeve is inserted into the limiting hole on the follower turntable; a part of the knob to be measured is fixed to the measuring table, and the other part is placed in the clamping sleeve through the measuring table; a plurality of clamping screws respectively penetrate through the clamping sleeve along the radial direction of the clamping sleeve to cooperate in clamping the knob to be measured.

[0008] Furthermore, a slide rail is provided on the first mounting frame; a slider is slidably connected to the slide rail; and the lower end surface of the sliding plate is fixedly connected to the slider.

[0009] Furthermore, the driving assembly includes a motor, a crank turntable and a connecting rod; the motor is fixed on the first mounting frame, and the machine shaft is fixedly connected to the crank turntable; the two ends of the connecting rod are rotatably connected to the crank turntable and the sliding plate respectively.

[0010] Furthermore, it also includes a first support and a second support arranged on the first mounting frame; the motor is fixed on the first support, and the machine shaft is fixedly connected to the crank turntable through the second support.

[0011] Furthermore, a plurality of racks are provided on the sliding plate.

[0012] Furthermore, a plurality of the rotating mechanisms are provided on the second mounting frame.

[0013] Furthermore, a bearing mounting hole is provided on the second mounting frame; the bearing is fixed in the bearing mounting hole through a bearing mounting seat; and the shaft body of the rotating shaft is fixedly connected to the bearing.

[0014] Furthermore, there are three clamping screws; the three clamping screws are screwed in along the radial direction of the clamping sleeve, and the angle between any two adjacent clamping screws is 120°.

[0015] Furthermore, the rotating mechanism also includes an initial positioning pin; the follower turntable is provided with two first positioning holes; the corresponding frustum is provided with two second positioning holes; the initial positioning pin passes through the first positioning hole and the second positioning hole for positioning.

[0016] Furthermore, a third positioning hole is provided on the test bench; the third positioning hole is directly opposite to the rotating mechanism below.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The present application provides a knob testing machine, wherein a driving assembly drives a sliding plate to perform linear reciprocating motion, so that the gear on the rotating shaft is subjected to the action of the rack on the sliding plate to rotate clockwise or counterclockwise, and at the same time drives the follower turntable and the tightening sleeve to rotate clockwise or counterclockwise. A part of the knob to be tested is fixed on a measuring table, and the other part is extended into the clamping sleeve through the measuring table, and is clamped together by a plurality of clamping screws to measure whether the knob meets the preset number of rotations. The width of the limit groove provided in the present application is greater than the diameter of the positioning column, so that when the follower turntable drives the clamping sleeve to rotate with the rotation of the rotating shaft, the eccentricity problem caused by the manufacture of the knob to be tested itself and the eccentricity problem existing in the assembly of the knob to be tested in the clamping sleeve can be eliminated, so that the radial force of the knob to be tested during the test is reduced, thereby improving the accuracy of judging the rotation life of the knob. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the use status of a knob test machine provided by the utility model;

[0020] Figure 2 yes Figure 1 The disassembly diagram of the upper part of the

[0021] Figure 3 yes Figure 1 The disassembly diagram of the lower half of the

[0022] Figure 4 This is the working principle diagram of the cooperation between the linear mechanism and the rotary mechanism;

[0023] Figure 5 yes Figure 1 Cross-sectional views of the rotary and linear mechanisms;

[0024] Figure 6 It is a three-dimensional structural schematic diagram of the rotating mechanism;

[0025] Figure 7 It is a half-section schematic diagram of the rotating mechanism;

[0026] Figure 8 is a front view of the clamping sleeve;

[0027] Fig. 9 yes Figure 8 A top view of

[0028] In the figure: 1. first mounting frame; 2. second mounting frame; 3. measuring table; 4. linear mechanism; 5. rotating mechanism; 6. sliding plate; 7. rack; 8. slider; 9. slide rail; 10. motor; 11. crank turntable; 12. connecting rod; 13. first support; 14. second support; 15. rotating shaft; 16. follower turntable; 17. clamping sleeve; 18. initial positioning pin; 19. gear; 20. round table; 21. positioning column; 22. limiting groove; 23. limiting hole; 24. limiting column; 25. clamping screw; 26. first positioning hole; 27. second positioning hole; 28. third positioning hole; 29. ​​rotating assembly; 30. knob; 31. bearing mounting hole; 32. bearing mounting seat; 33. bearing. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0030] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0031] See 1 to Fig. 9 As shown, this embodiment provides a knob 30 testing machine, including a linear mechanism 4, a rotating mechanism 5, a first mounting frame 1, a second mounting frame 2 and a measuring table 3. Figure 1 , a second mounting frame 2 is mounted on the first mounting frame 1, and a measuring platform 3 is fixed on the second mounting frame 2. A linear mechanism 4 is fixed on the first mounting frame 1, a rotating mechanism 5 is fixed on the second mounting frame 2, and the measuring platform 3 is used to fix a knob 30 assembly. It should be noted that the knob 30 assembly belongs to the prior art structure. A part of the knob 30 is fixed on the knob 30 assembly, and when the knob 30 assembly is fixed on the measuring platform 3, a part of the knob 30 is fixed by the rotating mechanism 5.

[0032] Specifically, the linear mechanism 4 includes a moving plate and a driving assembly. A plurality of racks 7 are installed on the upper end surface of the sliding plate 6 according to actual needs. Figure 3 , the present application is provided with two racks 7, and the lower end surface of the sliding plate 6 is slidably connected to the first mounting frame 1. In the present embodiment, a slider 8 is fixedly mounted on the lower end surface of the sliding plate 6, and a corresponding slide rail 9 slidably connected to the slider 8 is fixed on the first mounting frame 1. The driving assembly is fixed on the first mounting frame 1, and is used to drive the sliding plate 6 to reciprocate linearly.

[0033] In some embodiments, in combination Figure 3 and Figure 4The driving assembly includes a motor 10, a crank turntable 11 and a connecting rod 12. The motor 10 is fixed to the first mounting frame 1 through a first support 13. The shaft of the motor 10 is rotatably connected to the second support 14 through a bearing 33, and the front end of the shaft is fixedly connected to the crank turntable 11. One end of the connecting rod 12 is rotatably connected to the crank turntable 11, and the other end is rotatably connected to the sliding plate 6. The first support 13 and the second support 14 can enable the motor 10 to maintain stable rotation, avoid the deviation of the shaft during rotation due to its own vibration interference, and improve the accuracy and stability of the test.

[0034] Among them, combined Figure 2 , Figure 5 and Figure 6 , the rotating mechanism 5 includes a rotating shaft 15, a follower turntable 16 and a clamping sleeve 17. The shaft body of the rotating shaft 15 is rotatably connected to the second mounting frame 2. A gear 19 is fixed to the lower shaft end of the rotating shaft 15, and the gear 19 is meshed with the rack 7 in the linear mechanism 4. When the rack 7 moves forward and backward with the sliding plate 6, the rotating shaft 15 rotates clockwise or counterclockwise accordingly. A truncated table 20 is fixed to the upper shaft end of the rotating shaft 15, and two positioning columns 21 are symmetrically arranged on the truncated table 20. Two symmetrical limiting grooves 22 are provided on the corresponding follower turntable 16, and the two positioning columns 21 pass through the corresponding limiting grooves 22 respectively, so that the follower turntable 16 is limited above the truncated table 20, and the width of the limiting groove 22 is greater than the diameter of the positioning column 21. A limiting column 24 is fixed to the bottom of the clamping sleeve 17. During assembly, the limiting column 24 is inserted into the limiting hole 23 provided on the follower turntable 16. According to actual needs, the number of rotating mechanisms 5 is set accordingly. This embodiment includes two groups, each group includes three rotating mechanisms 5. The rotating mechanisms 5 of each group are meshed with the rack 7 below. In some embodiments, the second mounting frame 2 is correspondingly provided with a bearing mounting hole 31; the bearing 33 is assembled in the bearing mounting seat 32. The bearing mounting seat 32 is fitted into the bearing mounting hole 31 for fixing. The shaft body of the rotating shaft 15 is fixedly connected to the bearing 33.

[0035] The knob 30 to be tested is fixed on the test platform 3 by a rotating assembly 29, and the other part passes through the test platform 3 and is placed in the clamping sleeve 17. The clamping sleeve 17 is provided with a plurality of clamping screws 25, and the knob 30 to be tested is tightened by screwing the plurality of clamping screws 25 inward. When set, each clamping screw 25 passes through the clamping sleeve 17 in the radial direction of the clamping sleeve 17 to cooperate with the clamping sleeve 17 to clamp the knob 30 to be tested. Figure 8 and Fig. 9 In this embodiment, three clamping screws 25 are arranged on the clamping sleeve, and the included angle between any two adjacent clamping screws 25 among the three screws is 120°, so as to ensure that the knob 30 to be tested can be clamped stably.

[0036] In the rotating mechanism 5 provided in the present embodiment, since the width of the limit groove 22 is larger than the diameter of the positioning column 21, when the follower turntable 16 rotates along with the rotating shaft 15 and drives the knob 30 clamping sleeve 17 to rotate, the eccentricity problem caused by the manufacturing of the knob 30 to be tested and the eccentric assembly problem caused by the assembly of the knob 30 to be tested to the clamping sleeve 17 of the knob 30 can be eliminated, and the radial force of the knob 30 to be tested during the test can be reduced, thereby improving the accuracy of the test in judging the rotation life of the knob 30.

[0037] Optionally, in some embodiments, Figure 6 and Figure 7 , the rotating mechanism 5 also includes an initial positioning pin 18. Two first positioning holes 26 are provided on the follow-up turntable 16; and two second positioning holes 27 are provided on the corresponding truncated table 20 below. The initial positioning pin 18 passes through the first positioning hole 26 and the second positioning hole 27 for positioning. The follow-up turntable 16 and the rotating shaft 15 are limited by the mutual cooperation of the limiting groove 22 and the positioning column 21, so as to achieve the purpose of following. However, due to the gap between the limiting groove 22 and the positioning column 21 when they cooperate with each other, shaking is inevitable during the installation of the knob 30, which affects the assembly efficiency. Therefore, before the knob 30 is inserted into the test, the follow-up turntable 16 and the rotating shaft 15 need to be accurately positioned by the initial positioning pin 18. After the knob 30 is installed into the knob 30 clamping sleeve 17, the initial positioning pin 18 is withdrawn. The purpose of withdrawal is to avoid radial force on the knob 30 to be tested, which leads to inaccurate life measurement results of the knob 30 to be tested or damage during rotation.

[0038] Optional, such as Figure 1 A third positioning hole 28 is provided on the test bench, and the positioning hole is directly opposite to the rotating mechanism 5 below. When the rotating assembly 29 with the knob 30 is installed, it can be installed accordingly according to the third positioning hole 28, so that part of the knob 30 is placed in the clamping sleeve 17 through the third positioning block.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A knob testing machine, characterized in that: It includes a linear mechanism, a rotating mechanism and a second mounting frame arranged on the first mounting frame; the second mounting frame is provided with a measuring platform; The linear mechanism comprises a sliding plate and a driving assembly; the upper end surface of the sliding plate is provided with a rack; the lower end surface is slidably connected to the first mounting frame; the driving assembly is fixed to the first mounting frame, and is used to drive the sliding plate to reciprocate linearly; The rotating mechanism includes a rotating shaft, a follower turntable and a clamping sleeve; the shaft body of the rotating shaft is rotatably connected to the second mounting frame, the gear arranged at the lower shaft end is meshed with the rack, and a round table is fixed to the upper shaft end; the limiting groove opened on the follower turntable penetrates into the positioning column on the round table for limiting, and the width of the limiting groove is greater than the diameter of the positioning column; the limiting column arranged at the bottom of the clamping sleeve is inserted into the limiting hole on the follower turntable; a part of the knob to be measured is fixed to the measuring table, and the other part is placed in the clamping sleeve through the measuring table; a plurality of clamping screws respectively penetrate through the clamping sleeve along the radial direction of the clamping sleeve to cooperate in clamping the knob to be measured.

2. The knob testing machine according to claim 1, characterized in that: The first mounting frame is provided with a slide rail; a slider is slidably connected to the slide rail; and the lower end surface of the slide plate is fixedly connected to the slider.

3. The knob testing machine according to claim 1, characterized in that: The driving assembly includes a motor, a crank turntable and a connecting rod; the motor is fixed on the first mounting frame, and the machine shaft is fixedly connected to the crank turntable; the two ends of the connecting rod are rotatably connected to the crank turntable and the sliding plate respectively.

4. The knob testing machine according to claim 3, characterized in that: It also includes a first support and a second support arranged on the first mounting frame; the motor is fixed on the first support, and the machine shaft is fixedly connected to the crank turntable through the second support.

5. The knob testing machine according to claim 1, characterized in that: A plurality of racks are arranged on the sliding plate.

6. The knob testing machine according to claim 5, characterized in that: The second mounting frame is provided with a plurality of the rotating mechanisms.

7. The knob testing machine according to claim 6, characterized in that: The second mounting frame is provided with a bearing mounting hole; the bearing is fixed in the bearing mounting hole through a bearing mounting seat; and the shaft body of the rotating shaft is fixedly connected to the bearing.

8. The knob testing machine according to claim 1, characterized in that: There are three clamping screws; the three clamping screws are screwed in along the radial direction of the clamping sleeve, and the angle between any two adjacent clamping screws is 120°.

9. The knob testing machine according to claim 1, characterized in that: The rotating mechanism also includes an initial positioning pin; two first positioning holes are provided on the follower turntable; the corresponding truncated table is provided with two second positioning holes; the initial positioning pin passes through the first positioning hole and the second positioning hole for positioning.

10. The knob testing machine according to claim 1, characterized in that: The measuring platform is provided with a third positioning hole; the third positioning hole is directly opposite to the rotating mechanism below.

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