A torsion bar assembly device

Abstract

The present invention discloses a torsion bar assembly device, belonging to the technical field of assembly, which includes a frame. A torsion bar diameter detection device, a torsion bar positioning device and a torsion bar riveting and pressing device are fixedly arranged on the frame; the torsion bar positioning device includes an upper positioning device and a lower positioning device; the upper positioning device includes a first base and a first cylinder; the output end of the first cylinder is connected to the first base, so that the first base moves up and down along a linear guide rail; a first motor is fixedly arranged on the first support seat; the output end of the first motor is connected to a first rod, and an upper assembly block is fixedly arranged at the end of the first rod; the lower positioning device includes a second base; a lower assembly block is fixedly arranged on one side of the second base; the lower assembly block is concave, and a set number of protruding parts are arranged thereon. A torsion bar diameter measuring device is used to screen torsion bars. The torsion bar and components such as rollers and support plates are combined through the positioning device, and they are pressed and fixed through the riveting and pressing device to realize the assembly of the force limiting device.

Description

Technical Field

[0001] The present invention relates to a torsion bar assembly device, and particularly relates to the technical field of mechanical assembly of force-limiting devices. Background Art

[0002] A seat belt is a very important passive safety system in a modern vehicle safety system, and a seat belt buckle is a key component in the seat belt system. When a collision occurs, a common seat belt buckle will generate a relatively large waist force on the occupant, and this force will change with the change of the vehicle body rigidity, and the change range is relatively large. An excessive waist force will cause greater harm to the vehicle occupants. For example, in the patent with the publication number CN 116001723 A and the name of a device for absorbing micro-waist energy and a seat belt buckle, the device for absorbing micro-waist energy involved is a force-limiting device for a seat belt buckle. In this seat belt buckle force-limiting device, it includes a support plate and a steel wire rope. A positioning hole is provided on the support plate, and a torsion bar is arranged in the positioning hole. Both ends of the torsion bar are connected with rollers. The steel wire rope is folded in half in the middle, and both ends of the steel wire rope are respectively wound and fixed on the two rollers, and the winding directions of the steel wire rope on the two rollers are opposite. The diameter of a conventional torsion bar is measured manually with a vernier caliper, and the efficiency is low. And the torsion bar runs through the entire seat belt buckle force-limiting device, and an interference fit is adopted traditionally, and the matching degree requirements for the torsion bar and the holes on the rollers are relatively high. How to improve the assembly efficiency of the torsion bar and the roller has become a problem to be solved. Summary of the Invention

[0003] The purpose of the present invention is to provide a torsion bar assembly device, which can assemble the torsion bar and the roller, so as to make a force-limiting device.

[0004] To solve the above technical problems, the purpose of the present invention is realized as follows:

[0005] A torsion bar assembly device according to the present invention includes a frame, and a torsion bar diameter detection device, a torsion bar positioning device, and a torsion bar riveting device are fixedly arranged on the frame;

[0006] The torsion bar diameter detection device includes an optoelectronic diameter detection system and a torsion bar fixing rod fixed on one side of a fixing plate, and a third cylinder is fixedly arranged on the other side. A torsion bar fixing groove is arranged on the torsion bar fixing rod, and the piston rod of the third cylinder passes through the fixing plate to fix one end of the torsion bar in the torsion bar fixing groove; the optoelectronic diameter detection system includes an optoelectronic emitter and an optoelectronic receiver;

[0007] The torsion bar positioning device includes an upper positioning device and a lower positioning device;

[0008] The upper positioning device includes a first base and a first cylinder; a first support seat is fixedly arranged on one side surface of the first base, and the other side surface is connected to two parallel linear guide rails; the output end of the first cylinder is connected to the first base, so that the first base moves up and down along the linear guide rails;

[0009] A first motor is fixedly arranged on the first support seat; an output end of the first motor is connected to a first rod through a coupling, and an upper assembly block is fixedly arranged at the end of the first rod; the upper assembly block is concave in shape, and a set number of protrusions are arranged on it;

[0010] The lower positioning device comprises a second base; a lower assembly block is fixedly arranged on one side of the second base; the lower assembly block is concave in shape and is provided with a set number of protrusions.

[0011] On the basis of the above scheme and as a preferred scheme of the above scheme: the linear guide rail is fixedly arranged on the guide rail fixing plate; and a blocking device is fixedly arranged on the guide rail fixing plate.

[0012] On the basis of the above scheme and as a preferred scheme of the above scheme: one side surface of the second base is connected to two linear guide rails, and the lower positioning device is also connected to a first synchronous belt and a second synchronous belt.

[0013] On the basis of the above scheme and as a preferred scheme of the above scheme: two corresponding pairs of detection notches are arranged on the lower assembly block, and photoelectric switches corresponding to the detection notches are also fixedly arranged on the second base.

[0014] On the basis of the above scheme and as a preferred scheme of the above scheme: a first rotating piece is fixedly provided on one side of the coupling, the first rotating piece has a notch, and a first groove-shaped photoelectric switch corresponding to the first rotating piece is fixedly provided on the first support seat.

[0015] On the basis of the above scheme and as a preferred scheme of the above scheme: a second support seat is fixedly provided on one side of the second base, and a second motor and a second cylinder are fixedly provided on the second support seat; the output end of the second motor is connected to the pulley transmission through a belt; the pulley is fixedly connected to the rotating sleeve, the rotating sleeve passes through the second base and is fixedly connected thereto, and the end of the rotating sleeve is fixedly connected to the lower assembly block, and the lower assembly block has a through hole along the axial direction.

[0016] On the basis of the above scheme and as a preferred scheme of the above scheme: a second rotating piece is fixedly provided on one side of the pulley, and the second rotating piece has a notch; a second groove-shaped photoelectric switch is fixedly provided on the second support seat.

[0017] On the basis of the above solution and as a preferred solution to the above solution: The rotating sleeve has a first accommodation cavity arranged axially, a torsion bar storage column is arranged in the first accommodation cavity, the torsion bar storage column has a second accommodation cavity arranged axially, and the piston rod in the second cylinder can be inserted into the second accommodation cavity.

[0018] On the basis of the above solution and as a preferred solution to the above solution: A cylinder fixing plate is further fixedly arranged on the second base, two first fixing columns and a magnetic coupling non-bar cylinder are fixedly arranged on the cylinder fixing plate, a connecting plate is fixedly arranged on the magnetic coupling non-bar cylinder, and a second fixing column is fixedly arranged on the first connecting plate.

[0019] The beneficial effects of the present invention are as follows: A torsion bar assembly device according to the present invention uses a torsion bar diameter measuring device to screen qualified torsion bars, combines the torsion bar with components such as rollers and support plates through a positioning device, and then presses and fixes them through a riveting device, thereby realizing the assembly of the force limiting device. Description of the Drawings

[0020] Figure 1 is a structural diagram of a seat belt buckle force limiting device according to the present invention;

[0021] Figure 2 is a structural diagram of a torsion bar;

[0022] Figure 3 is a structural diagram of a roller;

[0023] Figure 4 is a structural diagram of a torsion bar positioning device;

[0024] Figure 5 is a structural diagram of a torsion bar diameter detection device;

[0025] Figure 6 is a connection structural diagram of an upper positioning device and a guide rail fixing plate;

[0026] Figure 7 is a structural diagram of an upper positioning device;

[0027] Figure 8 is a structural diagram of a lower positioning device;

[0028] Figure 9 is a structural diagram of a torsion bar storage column;

[0029] Figure 10 is a structural diagram of an upper assembly block;

[0030] Figure 11 is a structural diagram of a lower assembly block;

[0031] Figure 12It is a structural diagram of a rotating sleeve.

[0032] The markings in the figure are explained as follows: 100 - frame; 200 - torsion bar diameter detection device; 300 - torsion bar positioning device; 400 - blocking device; 1 - support plate; 2 - steel wire rope; 3 - roller; 4 - torsion bar; 5 - spline inclined plane; 6 - roller positioning hole; 7 - roller protrusion; 8 - first base; 9 - first cylinder; 10 - linear guide; 11 - first support seat; 12 - first motor; 13 - coupling; 14 - first rotating piece; 15 - first groove-shaped photoelectric switch; 16 - first rod; 17 - upper assembly block; 18 - second base; 19 - lower assembly block; 20 - detection notch; 21 - protrusion; 22 - photoelectric switch; 23 - second motor; 24 - second support seat; 25 - pulley; 26 - second cylinder; 27 - piston rod; 28 - torsion bar storage column; 29 - second fixed column; 30 - magnetic coupling non-bar cylinder; 31 - first connecting plate; 32 - storage column flange; 33 - second accommodation cavity; 34 - lower assembly block protrusion; 35 - lower assembly block notch; 36 - rotating sleeve; 37 - second rotating piece; 38 - second groove-shaped photoelectric switch; 39 - first fixed column; 40 - first accommodation cavity; 41 - cylinder fixing plate; 42 - photoelectric receiver; 43 - photoelectric emitter; 44 - torsion bar fixing groove; 45 - third cylinder; 46 - fixing plate; 47 - torsion bar fixing rod; 48 - guide rail fixing plate; 49 - first synchronous belt; 50 - second synchronous belt. Detailed implementation mode

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] As Figure 1 shown, the seat belt buckle force limiting device involved in the present invention includes a support plate, a steel wire rope, a sleeve, a torsion bar and a roller. A fixing hole is provided on the support plate for fixing the sleeve (not shown in the figure), and the torsion bar 4 passes through the sleeve, and both ends of the torsion bar 4 have splines, and the roller 3 has a keyhole matching the splines at the ends of the torsion bar 4, so that a roller 3 is fixedly provided at both ends of the torsion bar 4. As Figure 2 shown, an inclined spline surface 5 is provided on the spline. As Figure 3 shown, a roller protrusion 7 is provided on the roller 3 at a position opposite to the spline inclined surface. When riveting the force limiting device, the roller protrusion 7 can be pressed against the spline inclined surface 5, so that the two are riveted and fixed.

[0035] As Figure 4As shown in the figure, a torsion bar assembly device according to the present invention includes a frame 100. A torsion bar diameter detection device 200, a torsion bar positioning device 300, and a torsion bar riveting device are fixedly arranged on the frame 100. The torsion bar diameter detection device 200 is used to detect the diameter of the torsion bar. If the diameter of the torsion bar is within a certain error range, the next process is carried out; otherwise, it is discarded.

[0036] As Figure 5 shown, the torsion bar diameter detection device 200 includes an optoelectronic diameter detection system fixed to one side of a fixing plate 46 and a torsion bar fixing rod 47. A third cylinder 45 is fixedly arranged on the other side. A torsion bar fixing groove 44 is arranged on the torsion bar fixing rod 47. The piston rod of the third cylinder 45 passes through the fixing plate 46 to fix one end of the torsion bar in the torsion bar fixing groove 44. The optoelectronic diameter detection system includes an optoelectronic emitter 43 and an optoelectronic receiver 42. The end of the piston rod of the third cylinder 45 presses against one end of the torsion bar from below and fixes the other end in the torsion bar fixing groove 44. At this time, the optoelectronic diameter detection system works, and the optoelectronic emitter 43 and the optoelectronic receiver 42 measure the diameter of the torsion bar and display it on the display screen. If the diameter of the torsion bar is within the error range, it is used for assembling the force-limiting device of the seat belt buckle.

[0037] The torsion bar positioning device 300 includes an upper positioning device and a lower positioning device. As Figure 4 and 6 shown, the torsion bar positioning device 300 has two workstations. The upper positioning device is fixedly arranged on a guide rail fixing plate 48, and a blocking device 400 is fixedly arranged on the guide rail fixing plate 48 to block the movement of the lower positioning device. The blocking device 400 can be a rubber block.

[0038] As Figure 7 shown, the upper positioning device includes a first base 8 and a first cylinder 9. Both the first base 8 and the first cylinder 9 are fixedly connected to the frame. A first support seat 11 is fixedly arranged on one side surface of the first base 8, and the other side surface is connected to two parallel linear guide rails 10. The output end of the first cylinder 9 is connected to the first base 8, that is, the piston rod of the first cylinder 9 can make the first base 8 move up and down along the linear guide rails 10.

[0039] A first motor 12 is fixedly arranged on the first support seat 11. The output end of the first motor 12 is connected to a first rod 16 through a coupling 13, and an upper assembly block 17 is fixedly arranged at the end of the first rod 16. As Figure 10As shown, the upper assembly block 17 is concave, and is provided with a set number of protruding portions 21. The number of the protruding portions 21 is three, corresponding to the roller positioning holes 6 on the roller 3, and can be inserted into the roller positioning holes 6. The first motor 12 can drive the rotation of the first rod 16 and the upper assembly block 17 through the coupling 13, so as to adjust the position of the roller 3.

[0040] Further, a first rotating piece 14 is fixedly arranged on one side of the coupling 13. The first rotating piece 14 has a notch. A first groove-shaped photoelectric switch 15 corresponding to the first rotating piece 14 is fixedly arranged on the first support seat 11. The number of the first groove-shaped photoelectric switches 15 is two, and they are located on the same straight line passing through the center position of the first rotating piece 14. When the notch passes through one of the first groove-shaped photoelectric switches 15, this first groove-shaped photoelectric switch 15 presents a conducting state. When the first rotating piece 14 passes through one of the first groove-shaped photoelectric switches 15, this first groove-shaped photoelectric switch 15 disconnects.

[0041] As Figure 8 shown, the lower positioning device includes a second base 18; a lower assembly block 19 is fixedly arranged on one side of the second base 18. As Figure 11 shown, the lower assembly block 19 is concave, and is provided with a set number of protruding portions 21. The number of the protruding portions 21 is three, equivalent to the number of the roller positioning holes 6 in the roller 3, and can be inserted into the roller positioning holes 6.

[0042] Further, two pairs of detection notches 20 corresponding to each other are arranged on the lower assembly block 19. Photoelectric switches 22 corresponding to the detection notches 20 are also fixedly arranged on the second base 18. When the two photoelectric switches 22 and a pair of detection notches 20 are on the same straight line, when one of the rollers is in the concave area of the lower assembly block 19, the photoelectric switches 22 present a disconnected state.

[0043] Further, as Figure 8 shown, a second support seat 24 is fixedly arranged on one side of the second base 18. A second motor 23 and a second cylinder 26 are fixedly arranged on the second support seat 24; the output end of the second motor 23 is in transmission connection with a belt pulley 25 through a belt; the belt pulley 25 is fixedly connected with a rotating sleeve 36. When the second motor 23 works, it drives the belt pulley 25 to rotate through the belt, and the rotation of the belt pulley 25 can drive the rotation of the rotating sleeve 36.

[0044] The rotating sleeve 36 passes through the second base 18 and is fixedly connected thereto, and the end of the rotating sleeve 36 is fixedly connected to the lower fitting block 19. The rotation of the rotating sleeve 36 can drive the rotation of the lower fitting block 19, so that the position of the roller fixed in the concave area of the lower fitting block 19 can be adjusted. And the lower fitting block 19 has an axial through hole.

[0045] Further, a second rotating piece 37 is fixedly arranged on one side of the pulley 25, and the second rotating piece 37 has a notch; a second groove-shaped photoelectric switch 38 is fixedly arranged on the second support seat 24. The second rotating piece 37 has the same structure as the first rotating piece 14, and the size and angle of the notch are 90°, accounting for a quarter circle of the entire second rotating piece 37. The number of the second groove-shaped photoelectric switches 38 is also two and is located on a straight line passing through the center of the second rotating piece 37. Similarly, when the notch position passes through one of the second groove-shaped photoelectric switches 38, the second groove-shaped photoelectric switch 38 is turned on, and when other positions of the second rotating piece 37 pass, the second groove-shaped photoelectric switch 38 is turned off.

[0046] Further, as Figure 12 shown, the rotating sleeve 36 has a first receiving cavity 40 arranged axially, and a torsion bar storage column 28 is arranged in the first receiving cavity. And the rotating sleeve 36 has two ear plates, and is fixedly connected to the second base 18 through these two ear plates. As Figure 9 shown, the torsion bar storage column 28 has a second receiving cavity 33 arranged axially, and the opening of the second receiving cavity 33 has the same shape as the end of the torsion bar 4 and has a spline groove matching the spline. The piston rod 27 of the second cylinder 26 can be inserted into the second receiving cavity 33. And the second receiving cavity 33 is communicated with the through hole of the lower fitting block 19. During operation, a plurality of torsion bars 4 need to be placed in the second receiving cavity 33. When needed, the piston rod 27 of the second cylinder 26 pushes the torsion bar upward, and the torsion bar can be pushed into the seat belt buckle force limiting device, so that the two ends of the torsion bar 4 are assembled with the two rollers 3.

[0047] Further, two first fixing columns 39 are fixedly arranged on the second base 18, and a magnetic coupling rodless cylinder 30 is fixedly arranged through a cylinder fixing plate 41. A first connecting plate 31 is fixedly arranged on the magnetic coupling rodless cylinder 30, and a second fixing column 29 is fixedly arranged on the first connecting plate 31. When assembling the torsion bar, it is necessary to fix the steel wire rope connected thereto. The specific operation is to place the steel wire rope close to the support plate 1 between the two first fixing columns 39, and the loop part formed by folding the steel wire rope is sleeved on the second fixing column 29. When the magnetic coupling rodless cylinder 30 drives the first connecting plate 31 away from the seat belt buckle force limiting device, the second fixing column 29 tightens the steel wire rope 2, so that the steel wire rope can be fixed.

[0048] Further, the second support seat 24 is fixedly connected to the first synchronous belt 49 through a connecting plate, the cylinder fixing plate 41 is fixedly connected to the second synchronous belt 50, and the first synchronous belt 49 and the second synchronous belt 50 jointly drive the lower positioning device to move. When positioning, the lower positioning device is moved above the upper positioning device. And the blocking device 400 limits the lower positioning device.

[0049] The torsion bar riveting device rivets a roller protrusion 7 arranged at a position opposite to the spline inclined surface on the roller 3, presses the roller protrusion 7 against the spline inclined surface 5, so that the two are riveted and fixed. Specifically, two molds with the same contour as the roller 3 are used, and a cylinder with a large pressure is used to rivet the seat belt buckle force limiting device that is positioned and assembled, so that the roller protrusion 7 is deformed, so that the roller 3 is fixed to the torsion bar, thereby completing the assembly of the seat belt buckle force limiting device.

[0050] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. A torsion bar assembly device, characterized in that: It comprises a frame (100), on which a torsion bar diameter detection device (200), a torsion bar positioning device (300) and a torsion bar riveting device are fixedly arranged; The torsion bar diameter detection device (200) comprises a photoelectric diameter detection system and a torsion bar fixing rod (47) fixed to one side of a fixing plate (46); a third cylinder (45) is fixedly arranged on the other side; a torsion bar fixing groove (44) is arranged on the torsion bar fixing rod (47); a piston rod of the third cylinder (45) passes through the fixing plate (46) to fix one end of the torsion bar in the torsion bar fixing groove (44); the photoelectric diameter detection system comprises a photoelectric transmitter (43) and a photoelectric receiver (42); The torsion bar positioning device (300) comprises an upper positioning device and a lower positioning device; The upper positioning device comprises a first base (8) and a first cylinder (9); a first support seat (11) is fixedly provided on one side surface of the first base (8), and the other side surface is connected to two parallel linear guide rails (10); an output end of the first cylinder (9) is connected to the first base (8), so that the first base (8) moves up and down along the linear guide rails (10); A first motor (12) is fixedly mounted on the first support seat (11); an output end of the first motor (12) is connected to a first rod (16) via a coupling (13); an upper assembly block (17) is fixedly mounted on the end of the first rod (16); the upper assembly block (17) is concave in shape and has a set number of protrusions (21) disposed thereon; The lower positioning device comprises a second base (18); a lower assembly block (19) is fixedly provided on one side of the second base (18); the lower assembly block (19) is concave in shape and is provided with a set number of protrusions (21); A second support base (24) is fixedly provided on one side of the second base (18), and a second motor (23) and a second cylinder (26) are fixedly provided on the second support base (24); an output end of the second motor (23) is transmission-connected to a pulley (25) via a belt; the pulley (25) is connected to a rotating sleeve (36), the rotating sleeve (36) passes through the second base (18) and is fixedly connected thereto, and an end of the rotating sleeve (36) is fixedly connected to a lower assembly block (19), and the lower assembly block (19) has a through hole along an axial direction; The rotating sleeve (36) has a first accommodating cavity (40) arranged along the axial direction, a torsion bar storage column (28) is arranged in the first accommodating cavity (40), the torsion bar storage column (28) has a second accommodating cavity (33) arranged along the axial direction, and the piston rod (27) in the second cylinder (26) can be inserted into the second accommodating cavity (33).

2. A torsion bar assembly device according to claim 1, characterized in that: The linear guide rail (10) is fixedly arranged on a guide rail fixing plate (48); and a blocking device (400) is fixedly arranged on the guide rail fixing plate (48).

3. A torsion bar assembly device according to claim 1, characterized in that: One side surface of the second base (18) is connected to two linear guide rails, and the lower positioning device is also connected to a first synchronous belt (49) and a second synchronous belt (50).

4. A torsion bar assembly device according to claim 1, characterized in that: Two pairs of corresponding detection notches (20) are provided on the lower assembly block (19), and a photoelectric switch (22) corresponding to the detection notches (20) is also fixedly provided on the second base (18).

5. The torsion bar assembly device according to claim 1, characterized in that: A first rotating piece (14) is fixedly provided on one side of the coupling (13), the first rotating piece (14) having a notch, and a first slot-shaped photoelectric switch (15) corresponding to the first rotating piece (14) is fixedly provided on the first support seat (11).

6. The torsion bar assembly device according to claim 1, characterized in that: A second rotating piece (37) is fixedly arranged on one side of the pulley (25), and the second rotating piece (37) has a notch; and a second groove-shaped photoelectric switch (38) is fixedly arranged on the second supporting seat (24).

7. The torsion bar assembly device according to claim 1, characterized in that: A cylinder fixing plate (41) is also fixedly arranged on the second base (18), and two first fixing columns (39) and a magnetically coupled barless cylinder (30) are fixedly arranged on the cylinder fixing plate (41), and a first connecting plate (31) is fixedly arranged on the magnetically coupled barless cylinder (30), and a second fixing column (29) is fixedly arranged on the first connecting plate (31).

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