Potentiometer brush fatigue life test bench

Abstract

The utility model discloses a potentiometer electric brush fatigue life test bench, which comprises a test machine and an L-shaped workbench, the upper end face of the L-shaped workbench is movably connected with a moving seat through a horizontal moving mechanism, a bottom plate is installed above the moving seat through an electric push rod, the upper end face of the bottom plate is provided with a circular groove, and the circular groove is provided with a clamping groove. Clamping mechanisms are arranged on the two sides of the interior of the circular groove, a mounting frame is mounted in the middle of the front end face of the L-shaped workbench, a circular hole is formed in the upper end face of the mounting frame in a penetrating mode, a lifting rod is arranged on the inner side of the circular hole, and the upper portion of the outer surface of the lifting rod is fixedly sleeved with a fixing lantern ring; the lower portion of the inner wall of the round hole is fixedly connected with a limiting ring, and the two sides of the upper end face of the limiting ring are connected with the two sides of the lower end face of the fixing lantern ring through springs B. According to the utility model, potentiometers of different models can be clamped, the applicability is improved, and the ejector pin is convenient to replace, so that the subsequent test effect can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a potentiometre brush fatigue life test board and belongs to the technical field of potentiometre fatigue test. BACKGROUND

[0002] The potentiometre brush is a device for adjusting current, which changes the size of resistance by changing the position of the brush, thereby realizing the control of current. The potentiometre brush is composed of brush material, brush support and brush shaft. The brush material usually selects wear-resistant and conductive material, such as carbon material or metal. The brush support is used to fix the brush material to ensure good contact with the potentiometre. The brush shaft is used to connect the brush and the potentiometre, so that it can move with the rotation of the knob.

[0003] Before the potentiometre is shipped, the potentiometre brush needs to be tested for durability by using the brush fatigue life test board. When testing the fatigue life of the brush, the plunger is usually moved up and down to hit the brush back and forth to test.

[0004] However, the existing test board cannot fix different types of potentiometre, and the applicability is not high. After a long time of use, the plunger may be damaged, and it is not convenient to replace the plunger. Therefore, it does not meet the existing needs, and we propose a potentiometre brush fatigue life test board. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a potentiometre brush fatigue life test board to solve the problem that the existing test board cannot fix different types of potentiometre, the applicability is not high, and the plunger may be damaged after a long time of use, which is not convenient to replace the plunger.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a potentiometer brush fatigue life testing bench, comprising a testing machine and an L-shaped worktable. A movable seat is movably connected to the upper surface of the L-shaped worktable via a horizontal moving mechanism. A base plate is mounted above the movable seat via an electric push rod. A circular groove is provided on the upper surface of the base plate, and clamping mechanisms are provided on both sides inside the circular groove. A mounting frame is installed in the middle of the front face of the L-shaped worktable. A circular hole is provided through the upper surface of the mounting frame, and a lifting rod is provided inside the circular hole. A fixing collar is fixedly sleeved on the upper part of the outer surface of the lifting rod, and a limiting ring is fixedly connected to the lower part of the inner wall of the circular hole. The two sides of the upper end face of the limiting ring are connected to the two sides of the lower end face of the fixing collar by spring B. A base is installed on the lower end face of the lifting rod, and an installation groove is provided on the lower end face of the base. A pin is movably installed on the inner side of the installation groove through a detachable mechanism. Two support seats are installed on the upper part of the front end face of the L-shaped worktable. A cam is provided on the opposite side of the two support seats, and a motor A is installed on one side of one of the support seats.

[0007] Preferably, the output end of the motor A is fixedly connected to a coupling, the other end of the coupling is fixedly connected to a horizontal shaft, the horizontal shaft passes through the cam, and the other end of the horizontal shaft is rotatably connected to the outer surface of the support base through a bearing. The horizontal moving mechanism includes a horizontal plate, and a lead screw is provided on the inner side of the horizontal plate through a horizontal groove.

[0008] Preferably, a threaded block is fitted on the outer surface of the lead screw, the upper end face of the threaded block is fixedly connected to the lower end face of the movable seat, a motor B is installed on one side of the outer surface of the cross plate, the output end of the motor B is fixedly connected to one end of the lead screw through a short shaft, and the other end of the lead screw is rotatably connected to the inner wall of the cross groove through a bearing.

[0009] Preferably, the clamping mechanism includes a threaded rod, which is disposed on both sides of the outer surface of the base plate through threaded holes. The threaded rod is screwed into the threaded holes. Grooves are provided on both sides of the inner wall of the circular groove, and an arc-shaped plate is provided on the inner side of the groove.

[0010] Preferably, the arc-shaped plate and the threaded rod are rotatably connected by bearings, and arc-shaped clamping plates are connected to the opposite sides of the outer surfaces of the two arc-shaped plates by multiple springs A, and rubber pads are fixedly connected to the opposite sides of the outer surfaces of the two arc-shaped clamping plates.

[0011] Preferably, the detachable mechanism includes a pressure rod, which is disposed on both sides of the outer surface of the base through a through hole. A spring C is sleeved on the outer surface of the pressure rod. A slot is provided on both sides of the outer surface of the ejector pin. A spring D is installed on the inner wall of the slot. The other end of the spring D is fixedly connected to a limit post.

[0012] Preferably, the limiting column is matched with the through hole, the length of the limiting column is less than the depth of the clamping groove, the upper end surface of the ejector pin is provided with a plurality of positioning holes, the inner wall of the mounting groove is provided with a plurality of positioning columns, and the positioning holes and the positioning columns are matched one by one.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1、The utility model discloses a clamping mechanism is set up, the rotating shaft of potentiometer is placed in the inside of round groove, and then the threaded rod on both sides is rotated, and the threaded rod moves in the inside of threaded hole, drives arc plate to move, and arc plate extends in the inside of recess, and arc clamping plate can be clamped stably to potentiometer under the action of spring A, and the rubber pad is set up, can prevent arc clamping plate from causing damage to the rotating shaft of potentiometer, and further improve the stability of clamping,

[0015] 2、The utility model discloses a detachable mechanism, when the ejector pin is used for a long time, may wear, lead to inaccurate test result, need to replace it, press two pressure bars simultaneously, and the other end of the pressure bar drives the limiting column to the inside of the clamping groove, and the limiting column retracts into the inside of the clamping groove, at this time, the ejector pin can be detached from the inside of the mounting groove, and the ejector pin is replaced, and the new ejector pin is inserted into the inside of the mounting groove, the outer surface of the limiting column is attached to the inner wall of the mounting groove, until the ejector pin is completely clamped into the inside of the mounting groove, the limiting column contacts the through hole, and the limiting column is clamped into the inside of the through hole under the action of spring D, and the ejector pin is installed, the utility model discloses convenient replacement of the ejector pin, so that subsequent test effect can be guaranteed. ACCURACY

[0016] Figure 1 It is the overall structure schematic view of the utility model;

[0017] Figure 2 It is the overall front view of the utility model;

[0018] Figure 3 It is the local structure schematic view of the clamping mechanism of the utility model;

[0019] Figure 4 It is the local structure schematic view of the round hole of the utility model;

[0020] Figure 5 It is the local structure schematic view of the detachable mechanism of the utility model.

[0021] In the figure: 1, test machine; 2, L-shaped workbench; 3, cam; 4, support seat; 5, motor A; 6, horizontal moving mechanism; 601, cross plate; 602, threaded block; 603, screw rod; 604, motor B; 7, bottom plate; 8, thimble; 9, mounting frame; 10, moving seat; 11, clamping mechanism; 1101, threaded rod; 1102, threaded hole; 1103, arc clamping plate; 1104, arc plate; 1105, groove; 1106, spring A; 12, circular groove; 13, base; 14, lifting rod; 15, circular hole; 16, spring B; 17, limiting ring; 18, fixed sleeve ring; 19, mounting groove; 20, detachable mechanism; 2001, pressing rod; 2002, spring C; 2003, through hole; 2004, spring D; 2005, clamping groove; 2006, limiting column; 21, electric push rod. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0023] The motor A5 (model number 68KTYZ), the motor B604 (model number YEJ3-112M-4) and the electric push rod 21 (model number LBP40) mentioned in the utility model can be obtained by market purchase or private customization.

[0024] Please refer to Figures 1 to 5 The utility model provides an embodiment: a kind of potentiometer electric brush fatigue life test platform, including test machine 1 and L-shaped workbench 2, the upper end surface of L-shaped workbench 2 is movably connected with moving seat 10 by horizontal moving mechanism 6, the top of moving seat 10 is equipped with bottom plate 7 by electric push rod 21, the upper end surface of bottom plate 7 is provided with circular groove 12, the two sides in circular groove 12 are provided with clamping mechanism 11, the middle of L-shaped workbench 2 front end surface is equipped with mounting frame 9, the upper end surface of mounting frame 9 is provided with circular hole 15, the inboard of circular hole 15 is provided with lifting rod 14, the upper end surface of lifting rod 14 is fixedly sleeved with fixed sleeve ring 18, the lower side of circular hole 15 inner wall is fixedly connected with limiting ring 17, the upper end surface of limiting ring 17 is connected with the lower end surface of fixed sleeve ring 18 by spring B 16 on two sides, the lower end surface of lifting rod 14 is equipped with base 13, the lower end surface of base 13 is provided with mounting groove 19, the inboard of mounting groove 19 is movably equipped with thimble 8 by detachable mechanism 20, the upper end surface of L-shaped workbench 2 front end surface is equipped with two support seats 4, the opposite side of two support seats 4 is provided with cam 3, and one side of one of two support seats 4 is equipped with motor A 5.

[0025] Further, the output end of the motor A5 is fixedly connected with a shaft coupling, the other end of the shaft coupling is fixedly connected with a horizontal shaft, the horizontal shaft penetrates the cam 3, the other end of the horizontal shaft is rotatably connected with the outer surface of the support seat 4 through a bearing, and the horizontal moving mechanism 6 comprises a horizontal plate 601, the inner side of the horizontal plate 601 is provided with a lead screw 603 through a horizontal groove, and the motor A5 can drive the horizontal shaft to rotate, so that the cam 3 is driven to rotate.

[0026] The outer surface of the lead screw 603 is sleeved with a threaded block 602, the upper end surface of the threaded block 602 is fixedly connected with the lower end surface of the moving seat 10, one side of the outer surface of the horizontal plate 601 is provided with a motor B 604, the output end of the motor B 604 is fixedly connected with one end of the lead screw 603 through a short shaft, the other end of the lead screw 603 is rotatably connected with the inner wall of the horizontal groove through a bearing, and the motor B 604 can drive the lead screw 603 to rotate, so that the stability of the rotation of the lead screw 603 is improved.

[0027] The clamping mechanism 11 comprises a threaded rod 1101, the threaded rod 1101 is arranged on the outer surface of the bottom plate 7 through a threaded hole 1102, the threaded rod 1101 is screwed with the threaded hole 1102, the inner wall of the circular groove 12 is provided with a groove 1105 on the two sides, the inner side of the groove 1105 is provided with an arc-shaped plate 1104, and the threaded rod 1101 can move in the inner side of the threaded hole 1102 by rotating the threaded rod 1101.

[0028] The arc-shaped plate 1104 is rotatably connected with the threaded rod 1101, the outer surface of the two arc-shaped clamping plates 1103 opposite to each other is connected with an arc-shaped clamping plate 1103 through a plurality of springs A 1106, the outer surface of the two arc-shaped clamping plates 1103 opposite to each other is fixedly connected with a rubber pad, the threaded rod 1101 can drive the arc-shaped plate 1104 to move, and the rubber pad can prevent the arc-shaped clamping plate 1103 from damaging the rotating shaft of the potentiometer, and the stability of clamping is improved.

[0029] The detachable mechanism 20 comprises a pressing rod 2001, the pressing rod 2001 is arranged on the outer surface of the base 13 through a through hole 2003, the outer surface of the pressing rod 2001 is sleeved with a spring C 2002, the outer surface of the ejector pin 8 is provided with a clamping groove 2005 on the two sides, the inner wall of the clamping groove 2005 is provided with a spring D 2004, the other end of the spring D 2004 is fixedly connected with a limiting column 2006, and the limiting column 2006 can be retracted into the inner side of the clamping groove 2005.

[0030] The limiting column 2006 is matched with the through hole 2003, the length of the limiting column 2006 is less than the depth of the clamping groove 2005, the upper end surface of the ejector pin 8 is provided with a plurality of positioning holes, the inner wall of the mounting groove 19 is provided with a plurality of positioning columns, the positioning holes and the positioning columns are matched one by one, the limiting column 2006 can be clamped into the inner side of the through hole 2003, the limiting column 2006 can be retracted into the inner side of the clamping groove 2005, and the stability of the ejector pin 8 in the mounting groove 19 is improved.

[0031] When the potentiometer brush fatigue life test bench is in use, the shaft of the potentiometer is placed in the inner side of the circular groove 12 through the clamping mechanism 11, the arc-shaped plate 1104 is moved by rotating the threaded rods 1101, the threaded rods 1101 move in the threaded holes 1102, the arc-shaped plate 1104 extends out of the inner side of the groove 1105, the arc-shaped clamping plate 1103 can stably clamp the potentiometer under the action of the spring A 1106, and the rubber pad can prevent the arc-shaped clamping plate 1103 from damaging the shaft of the potentiometer, and further improve the stability of clamping; when the ejector pin 8 is used for a long time and is abraded, the test result is inaccurate, and the ejector pin 8 needs to be replaced, the limiting column 2006 is pushed into the inner side of the clamping groove 2005 by pressing the other end of the pressing rod 2001, the limiting column 2006 is retracted into the inner side of the clamping groove 2005, the ejector pin 8 can be disassembled from the inner side of the mounting groove 19 at this time, the ejector pin 8 is replaced, the new ejector pin 8 is inserted into the inner side of the mounting groove 19, the outer surface of the limiting column 2006 is attached to the inner wall of the mounting groove 19, until the ejector pin 8 is completely clamped into the inner side of the mounting groove 19, the limiting column 2006 contacts the through hole 2003, the limiting column 2006 is clamped into the inner side of the through hole 2003 under the action of the spring D 2004, and the installation of the ejector pin 8 is completed, the utility model can clamp different models of potentiometers, improve the applicability, and facilitate the replacement of the ejector pin 8, so that the subsequent test effect can be guaranteed.

[0032] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the involved claims.

Claims

1. A potentiometer brush fatigue life test bench, comprising a testing machine (1) and an L-shaped workbench (2), characterized in that: The upper end face of the L-shaped workbench (2) is movably connected with a moving seat (10) through a horizontal moving mechanism (6), the upper side of the moving seat (10) is provided with a bottom plate (7) through an electric push rod (21), the upper end face of the bottom plate (7) is provided with a circular groove (12), the two sides in the circular groove (12) are provided with clamping mechanisms (11), the middle of the front end face of the L-shaped workbench (2) is provided with a mounting rack (9), the upper end face of the mounting rack (9) is provided with a circular hole (15), the inner side of the circular hole (15) is provided with a lifting rod (14), the outer surface of the lifting rod (14) is fixedly provided with a fixed sleeve ring (18) on the upper side, the lower side of the inner wall of the circular hole (15) is fixedly connected with a limiting ring (17), the two sides of the upper end face of the limiting ring (17) are connected with the two sides of the lower end face of the fixed sleeve ring (18) through a spring B (16), the lower end face of the lifting rod (14) is provided with a base (13), the lower end face of the base (13) is provided with a mounting groove (19), the inner side of the mounting groove (19) is movably provided with a thimble (8) through a detachable mechanism (20), the upper side of the front end face of the L-shaped workbench (2) is provided with two supporting seats (4), the opposite side of the two supporting seats (4) is provided with a cam (3), and the side of one of the supporting seats (4) is provided with a motor A (5).

2. The potentiometer brush fatigue life test bench according to claim 1, characterized in that: The output end of the motor A (5) is fixedly connected with a shaft coupling, the other end of the shaft coupling is fixedly connected with a horizontal shaft, the horizontal shaft penetrates the cam (3), and the other end of the horizontal shaft is rotatably connected with the outer surface of the supporting seat (4) through a bearing.

3. A potentiometer brush fatigue life test bench according to claim 2, characterized in that: The horizontal moving mechanism (6) comprises a horizontal plate (601), and the inner side of the horizontal plate (601) is provided with a lead screw (603) through a horizontal groove.

4. The potentiometer brush fatigue life test bench of claim 1, wherein: The outer surface of the lead screw (603) is provided with a threaded block (602), the upper end face of the threaded block (602) is fixedly connected with the lower end face of the moving seat (10), one side of the outer surface of the horizontal plate (601) is provided with a motor B (604), the output end of the motor B (604) is fixedly connected with one end of the lead screw (603) through a short shaft, and the other end of the lead screw (603) is rotatably connected with the inner wall of the horizontal groove through a bearing.

5. A potentiometer brush fatigue life test bench according to claim 4, characterized in that: The clamping mechanism (11) comprises a threaded rod (1101), the threaded rod (1101) is arranged on the two sides of the outer surface of the bottom plate (7) through a threaded hole (1102), the threaded rod (1101) is screwed with the threaded hole (1102), the two sides of the inner wall of the circular groove (12) are provided with a groove (1105), and the inner side of the groove (1105) is provided with an arc-shaped plate (1104). The arc-shaped plate (1104) is rotatably connected with the threaded rod (1101), the opposite sides of the outer surfaces of the two arc-shaped plates (1104) are connected with arc-shaped clamping plates (1103) through a plurality of spring As (1106), and the opposite sides of the outer surfaces of the two arc-shaped clamping plates (1103) are fixedly connected with rubber pads.

6. The potentiometer brush fatigue life test bench of claim 1, wherein: Said detachable mechanism (20) includes a pressing rod (2001), the pressing rod (2001) is arranged at the both sides of the bottom (13) outer surface through the hole (2003), the outer surface of the pressing rod (2001) is equipped with spring C (2002), the both sides of the thimble (8) outer surface are provided with the clamping groove (2005), the inner wall of the clamping groove (2005) is installed spring D (2004), the other end of spring D (2004) is fixedly connected with the limiting column (2006).

7. A potentiometer brush fatigue life test bench according to claim 6, characterized in that: Said limiting column (2006) is matched with the through hole (2003), the length of the limiting column (2006) is less than the depth of the clamping groove (2005), the upper end surface of the thimble (8) is provided with a plurality of positioning holes, the top surface of the installation slot (19) inner wall is installed with a plurality of positioning columns, and the positioning hole and the positioning column are one-to-one corresponding and matched.

Images