CN115509037A - A liquid crystal module assembly bonding alignment fixture - Google Patents

Abstract

The invention belongs to the technical field of production equipment of liquid crystal modules, and particularly relates to a fitting alignment jig for a liquid crystal module assembly, which aims at solving the problems that most of the existing liquid crystal glass on a liquid crystal module and a glass cover plate are inconvenient to align and place, and most of the existing liquid crystal glass and glass cover plate are manually operated during testing, so that time and labor are wasted, and the existing liquid crystal module assembly is slow to operate. The invention has simple operation and convenient use, can quickly align and laminate the liquid crystal glass and the glass cover plate, and can facilitate the connection detection of the FPC connecting piece on the liquid crystal glass, thereby being convenient for people to use.

Description

A liquid crystal module assembly bonding alignment fixture

technical field

The invention relates to the technical field of liquid crystal module production equipment, in particular to a liquid crystal module assembly alignment fixture.

Background technique

At present, the development trend of flat-panel TVs is not only thin but also borderless, and has become the goal and selling point pursued by various TV industries. At the same time, flat-panel TVs can guide market development and attract consumers' desire to buy. However, the liquid crystal module in the flat-panel TV generally has the liquid crystal glass and the glass cover plate laminated in alignment.

When laminating the liquid crystal glass and the glass cover on the liquid crystal module, most of them are inconvenient to place in alignment, and most of the connections with the FPC connectors during the test are manually operated, which is time-consuming and labor-intensive. Slow, so we propose a liquid crystal module assembly alignment fixture.

Contents of the invention

The purpose of the present invention is to solve the problem that when laminating the liquid crystal glass and the glass cover plate on the liquid crystal module, most of them are inconvenient to carry out alignment, and most of the connections with the FPC connectors during testing are Manual operation is time-consuming and labor-intensive, and the operation is slow, so a liquid crystal module assembly alignment fixture is proposed.

In order to achieve the above object, the present invention adopts the following technical solutions:

A liquid crystal module assembly alignment fixture, including a base, a bracket is fixedly installed on the top of the base, a positioning seat is fixedly installed on one side of the bracket, a screw is threaded on the positioning seat, and a screw rod is threaded on the positioning seat. A driving mechanism is provided, and the driving mechanism is connected with the screw drive. A pressing plate is installed on the bottom of the screw, and a pressing plate is installed under the pressing plate. A top block is installed on the pressing plate. Both sides of the bracket are fixedly installed with fixing plates. , the same transmission rod is installed between the fixed plate and the base, the top of the base is provided with a placement groove, the bottom inner wall of the placement groove is equipped with an FPC connector, and the bottom inner wall of the placement groove is provided with a reset mechanism. The top of the base is provided with a clamping mechanism, the top of the base is fixedly installed with a placement box, and a plurality of liquid crystal glasses are stacked in the placement box, the top of the base is provided with a groove, and a rotating shaft is installed on the inner wall of the groove. The upper sleeve is provided with a rubber wheel, the rubber wheel cooperates with the liquid crystal glass, a second motor is fixedly installed on the inner wall of one side of the groove, and a rotating rod is fixedly installed on the output shaft of the second motor, and the rotating rod is connected to the rotating shaft through transmission. .

Preferably, the clamping mechanism includes a moving plate, a push rod, a connecting plate, a splint and a screw rod. Two symmetrical sliding grooves are provided on the top of the base, and the screw rod is rotatably connected to the corresponding sliding groove. The screw rods are threadedly connected, the two ejector rods are respectively installed on the sides of the two moving plates close to each other, the two connecting plates are respectively fixedly installed on the sides of the two ejector rods close to each other, and the two splints are respectively installed on the two sides On the sides where the connecting plates are close to each other, the rotating screw can be screwed to the moving plate, so as to clamp and fix the liquid crystal glass and the glass cover plate through the splint.

Preferably, the drive mechanism includes a first motor, a driving gear and a driven gear, the first motor is mounted on the bottom of the positioning seat, the driving gear is fixedly connected to the output shaft of the first motor, and the driven gear rotates with the top of the positioning seat connected, and the driven gear is slidingly connected with the screw rod, the driving gear and the driven gear mesh with each other, the output shaft of the first motor can drive the driven gear to rotate through the mutual meshing of the driving gear and the driven gear, and the driven gear and the driven gear The sliding connection of the screw drives the screw to rotate.

Preferably, the reset mechanism includes a buffer rod, a reset plate and a reset spring. Two symmetrically arranged driving buffer grooves are provided on the bottom inner wall of the placement groove. The buffer rod is slidably connected to the buffer groove, and the reset plate is fixedly installed on the top of the buffer rod. , the return spring is fixedly installed on the bottom inner wall of the buffer tank, and the top of the return spring is fixedly connected with the buffer rod, the buffer rod and the buffer tank can buffer the liquid crystal glass and the glass cover, and can be ejected and reset by the return spring.

Preferably, two symmetrically arranged connecting rods are slidably connected to the connecting plate, one end of the connecting rod is fixedly installed with a baffle plate, and the sides of the two splints away from each other are fixedly connected to the corresponding connecting rod. The top of the top is fixedly connected with the corresponding connecting rod, and the outer side of the connecting rod is covered with a top spring, the connecting rod can position the pressing plate and the splint, and is supported and buffered by the top spring.

Preferably, the bottom end of the transmission rod is fixedly installed with a first bevel gear, and one end of the screw rod is fixedly installed with a second bevel gear, the first bevel gear meshes with the corresponding second bevel gear, and the rotating The transmission rod can drive the screw rod to rotate through the mutual meshing of the first bevel gear and the second bevel gear.

Preferably, the outer sliding sleeve of the screw rod is provided with a first sprocket, the outer fixed sleeve of the transmission rod is provided with a second sprocket, the first sprocket and the two second sprockets are engaged with the same chain, and the second sprocket A sprocket is rotatably connected with the positioning seat, and the rotating screw can drive the two transmission rods to rotate simultaneously through the mutual engagement of the first sprocket, the two second sprockets and the chain.

Preferably, a worm is provided on the fixed sleeve on the rotating rod, and a worm gear is provided on the fixed sleeve on the rotating shaft. The worm and the worm gear mesh with each other, and the rotating rotating rod can drive the rotating shaft to rotate through the mutual meshing of the worm and the worm gear.

Compared with the prior art, the present invention has the advantages of:

(1) In this scheme, due to the mutual meshing between the driving gear and the driven gear, and the sliding connection between the driven gear and the screw rod, and the threaded connection between the screw rod and the positioning seat, the first motor can drive the pressure plate to the liquid crystal glass and the glass cover. The board is pressed and positioned;

(2) Due to the mutual engagement of the first sprocket, the two second sprockets and the chain, the rotating screw can drive the transmission rod to rotate, and through the mutual engagement of the first bevel gear and the second conical bevel gear , so that the rotating screw can drive the screw to rotate, and then clamp and fix the liquid crystal glass and the glass cover through the splint;

(3) Due to the mutual engagement of the worm screw and the worm wheel, and the mutual cooperation of the rubber wheel and the liquid crystal glass, the second motor can drive the liquid crystal glass through the rotating shaft for feeding, which is convenient for people to use.

The invention is simple in operation and convenient in use, can quickly carry out alignment bonding between the liquid crystal glass and the glass cover plate, and at the same time facilitates the connection detection of the FPC connector to the liquid crystal glass, and is convenient for people to use.

Description of drawings

Fig. 1 is a schematic diagram of a three-dimensional structure of a liquid crystal module assembly alignment fixture proposed by the present invention;

Fig. 2 is a structural schematic diagram of a liquid crystal module assembly alignment fixture proposed by the present invention;

Fig. 3 is a side view structural schematic diagram of a liquid crystal module assembly alignment fixture proposed by the present invention;

Fig. 4 is a structural schematic diagram of part A of a liquid crystal module assembly alignment fixture proposed by the present invention;

FIG. 5 is a schematic structural diagram of part B of a liquid crystal module assembly alignment fixture proposed by the present invention.

In the figure: 1. base; 2. bracket; 3. positioning seat; 4. screw; 5. first motor; 6. pressing plate; 7. pressing plate; 8. top block; 9. connecting rod; 10. top spring; 11. Baffle plate; 12. Driving gear; 13. Driven gear; 14. Transmission rod; 15. Sliding groove; 16. Moving plate; 17. Screw rod; 18. Push rod; 19. Connecting plate; 20. Splint; 21. Placement slot; 22. FPC connector; 23. First bevel gear; 24. Second bevel gear; 25. Placement box; 26. Liquid crystal glass; 27. Groove; 28. Second motor; 29. 30, rotating shaft; 31, rubber wheel; 32, worm gear; 33, worm screw; 34, buffer tank; 35, buffer rod; 36, return plate; 37, return spring; 38, fixed plate.

detailed description

The following will clearly and completely describe the technical solutions in this embodiment with reference to the drawings in this embodiment. Obviously, the described embodiment is only a part of this embodiment, not all of the embodiments.

Embodiment one

Referring to Figures 1-5, a liquid crystal module assembly alignment fixture includes a base 1, a bracket 2 is fixedly installed on the top of the base 1, and a positioning seat 3 is fixedly installed on one side of the bracket 2. The screw rod 4 is threadedly connected, the positioning seat 3 is provided with a driving mechanism, the driving mechanism is connected with the screw rod 4 in transmission, the bottom of the screw rod 4 is rotated and installed with a pressing plate 6, and the bottom of the pressing plate 6 is provided with a pressing plate 7, and a top is installed on the pressing plate 7. Block 8, both sides of support 2 are all fixedly installed with fixed plate 38, between fixed plate 38 and base 1, rotation is installed with same transmission rod 14, and the top of base 1 is provided with placement groove 21, and the bottom inner wall of placement groove 21 An FPC connector 22 is installed, a reset mechanism is provided on the bottom inner wall of the placement groove 21, a clamping mechanism is provided on the top of the base 1, and a placement box 25 is fixedly installed on the top of the base 1, and a plurality of liquid crystals are stacked in the placement box 25. Glass 26, the top of base 1 is provided with groove 27, and rotating shaft 30 is installed on the inwall of groove 27, and rotating shaft 30 is set with rubber wheel 31, and rubber wheel 31 cooperates with liquid crystal glass 26, and one of groove 27 A second motor 28 is fixedly installed on the side inner wall, and a rotating rod 29 is fixedly installed on the output shaft of the second motor 28 , and the rotating rod 29 is connected to the rotating shaft 30 through transmission.

In this embodiment, the clamping mechanism includes a moving plate 16, a push rod 18, a connecting plate 19, a splint 20, and a screw rod 17. The top of the base 1 is provided with two symmetrically arranged sliding grooves 15, and the screw rod 17 and the corresponding sliding The slot 15 is rotationally connected, the moving plate 16 is threadedly connected with the corresponding screw rod 17, and the two push rods 18 are respectively installed on the sides where the two moving plates 16 are close to each other, and the two connecting plates 19 are fixedly installed on the two push rods respectively. 18 close to each other, and two splints 20 are respectively arranged on the sides of the two connecting plates 19 close to each other.

In this embodiment, the driving mechanism includes a first motor 5, a driving gear 12 and a driven gear 13, the first motor 5 is installed on the bottom of the positioning seat 3, the driving gear 12 is fixedly connected with the output shaft of the first motor 5, and the driven gear 12 is fixedly connected to the output shaft of the first motor 5. The gear 13 is rotatably connected to the top of the positioning seat 3 , and the driven gear 13 is slidably connected to the screw rod 4 , and the driving gear 12 and the driven gear 13 mesh with each other.

In this embodiment, the reset mechanism includes a buffer rod 35, a reset plate 36 and a reset spring 37. Two symmetrically arranged drive buffer grooves 34 are provided on the bottom inner wall of the placement groove 21. The buffer rod 35 is slidably connected with the buffer groove 34, and the reset plate 36 is fixedly installed on the top of the buffer rod 35, and the return spring 37 is fixedly installed on the bottom inner wall of the buffer tank 34, and the top of the return spring 37 is fixedly connected with the buffer rod 35.

In this embodiment, two symmetrically arranged connecting rods 9 are slidably connected to the pressing plate 6 and the connecting plate 19, and one end of the connecting rod 9 is fixedly mounted with a baffle 11, and the sides of the two splints 20 away from each other are connected to the corresponding connecting rods. The rod 9 is fixedly connected, and the top of the pressing plate 7 is fixedly connected with the corresponding connecting rod 9 , and the outer side of the connecting rod 9 is provided with a top spring 10 .

In this embodiment, a first bevel gear 23 is fixedly installed on the bottom end of the transmission rod 14, and a second bevel gear 24 is fixedly installed on one end of the screw rod 17. The first bevel gear 23 and the corresponding second bevel gear 24 meshed with each other.

In this embodiment, the outer sliding sleeve of the screw rod 4 is provided with a first sprocket, the outer fixed sleeve of the transmission rod 14 is provided with a second sprocket, and the same chain is engaged on the first sprocket and the two second sprockets. And the first sprocket is rotatably connected with the positioning seat 3 .

In this embodiment, a worm 33 is fixedly mounted on the rotary rod 29 , and a worm wheel 32 is fixedly mounted on the rotating shaft 30 , and the worm 33 and the worm wheel 32 mesh with each other.

Embodiment two

Referring to Figures 1-5, a liquid crystal module assembly alignment fixture includes a base 1, a bracket 2 is welded on the top of the base 1, a positioning seat 3 is welded on one side of the bracket 2, and the positioning seat 3 is threaded. There is a screw 4, a driving mechanism is provided on the positioning seat 3, the driving mechanism is connected with the screw 4 in transmission, the bottom of the screw 4 is rotated and installed with a pressing plate 6, and a pressing plate 7 is arranged under the pressing plate 6, and a top block 8 is installed on the pressing plate 7 , Both sides of the bracket 2 are welded with a fixed plate 38, the same transmission rod 14 is installed between the fixed plate 38 and the base 1, the top of the base 1 is provided with a placement groove 21, and an FPC is installed on the bottom inner wall of the placement groove 21 Connector 22, reset mechanism is provided on the bottom inner wall of placement groove 21, clamping mechanism is provided on the top of base 1, placement box 25 is welded on the top of base 1, and a plurality of liquid crystal glasses 26 are stacked in placement box 25, base 1 is provided with a groove 27 on the top of the groove 27. A rotating shaft 30 is installed on the inner wall of the groove 27. A rubber wheel 31 is sleeved on the rotating shaft 30. The rubber wheel 31 cooperates with the liquid crystal glass 26. On one side of the groove 27, the inner wall passes A second motor 28 is fixed to the bolt, and a rotating rod 29 is welded on the output shaft of the second motor 28 , and the rotating rod 29 is connected to the rotating shaft 30 through transmission.

In this embodiment, the clamping mechanism includes a moving plate 16, a push rod 18, a connecting plate 19, a splint 20, and a screw rod 17. The top of the base 1 is provided with two symmetrically arranged sliding grooves 15, and the screw rod 17 and the corresponding sliding The slot 15 is rotationally connected, the moving plate 16 is threadedly connected with the corresponding screw rod 17, and the two push rods 18 are respectively installed on the sides where the two moving plates 16 are close to each other, and the two connecting plates 19 are respectively welded on the two push rods 18 On the side close to each other, the two splints 20 are respectively arranged on the side of the two connecting plates 19 close to each other, and the rotating screw mandrel 17 can be screwed with the moving plate 16, so that the liquid crystal glass 26 and the glass cover can be connected by the splint 20. The board is clamped and fixed.

In this embodiment, the driving mechanism includes a first motor 5, a driving gear 12 and a driven gear 13, the first motor 5 is installed on the bottom of the positioning seat 3, the driving gear 12 is fixedly connected with the output shaft of the first motor 5, and the driven gear 12 is fixedly connected to the output shaft of the first motor 5. The gear 13 is rotatably connected with the top of the positioning seat 3, and the driven gear 13 is slidably connected with the screw rod 4. The driving gear 12 and the driven gear 13 are meshed with each other. The output shaft of the first motor 5 can pass through the driving gear 12 and the driven gear 13. The mutual meshing drives the driven gear 13 to rotate, and the sliding connection between the driven gear 13 and the screw 4 drives the screw 4 to rotate.

In this embodiment, the reset mechanism includes a buffer rod 35, a reset plate 36 and a reset spring 37. Two symmetrically arranged drive buffer grooves 34 are provided on the bottom inner wall of the placement groove 21. The buffer rod 35 is slidably connected with the buffer groove 34, and the reset plate 36 is welded on the top of bumper bar 35, back-moving spring 37 is welded on the bottom inner wall of buffer tank 34, and the top of back-moving spring 37 is fixedly connected with buffer bar 35, and buffer bar 35 and buffer slot 34 can be opposite to liquid crystal glass 26 and glass cover The plate is cushioned and can be ejected and reset by a return spring 37.

In this embodiment, two symmetrically arranged connecting rods 9 are slidably connected to the pressing plate 6 and the connecting plate 19. One end of the connecting rod 9 is welded with a baffle 11, and the side of the two splints 20 away from each other is connected to the corresponding connecting rod. 9 are fixedly connected, the top of the pressing plate 7 is fixedly connected with the corresponding connecting rod 9, and the outer side of the connecting rod 9 is provided with a top spring 10, the connecting rod 9 can position the pressing plate 7 and the splint 20, and the top spring 10 For support and cushioning.

In this embodiment, the bottom end of the transmission rod 14 is welded with a first bevel gear 23, and one end of the screw rod 17 is welded with a second bevel gear 24, and the first bevel gear 23 and the corresponding second bevel gear 24 are mutually meshing, the rotating transmission rod 14 can drive the screw mandrel 17 to rotate through the mutual meshing of the first bevel gear 23 and the second bevel gear 24 .

In this embodiment, the outer sliding sleeve of the screw rod 4 is provided with a first sprocket, the outer fixed sleeve of the transmission rod 14 is provided with a second sprocket, and the same chain is engaged on the first sprocket and the two second sprockets. And the first sprocket is rotatably connected with the positioning seat 3, and the rotating screw rod 4 can drive the two transmission rods 14 to rotate simultaneously through the mutual engagement of the first sprocket, the two second sprockets and the chain.

In this embodiment, a worm 33 is fixedly set on the rotating rod 29, and a worm wheel 32 is fixedly set on the rotating shaft 30. The worm 33 and the worm wheel 32 mesh with each other. The rotating shaft 30 rotates.

In this embodiment, when working, start the switch of the second motor 28, the output shaft of the second motor 28 drives the rotating rod 29 to rotate forward, and the rotating rotating rod 29 drives the rotating shaft 30 to rotate through the mutual engagement of the worm 33 and the worm wheel 32, and the rotating shaft 30, through the mutual bonding of the rubber wheel 31 and the liquid crystal glass 26, the liquid crystal glass 26 can be driven to move into the placement groove 21, and the glass cover is placed on the liquid crystal glass 26, and between the glass cover and the liquid crystal glass 26 Put glue between them, start the switch of the first motor 5, the output shaft of the first motor 5 drives the driven gear 13 to rotate through the mutual meshing of the driving gear 12 and the driven gear 13, and the rotating driven gear 13 passes through the screw thread with the screw rod 4 The connection drives the screw 4 to rotate, and the screw 4 drives the screw 4 to move downward through the threaded connection with the positioning seat 3, and presses the glass cover and the liquid crystal glass 26 through the pressing plate 6 and the pressing plate 7, and the rotating screw 4 passes through the first The mutual engagement of a sprocket, two second sprockets and the chain drives two transmission rods 14 to rotate, and the transmission rod 14 drives the screw mandrel 17 to rotate through the mutual engagement of the first bevel gear 23 and the second bevel gear 24, and the screw rod 14 rotates. The rod 17 drives the moving plate 16 to move through the screw connection with the moving plate 16, and the moving plate 16 drives the splint 20 to clamp and align the glass cover plate and the liquid crystal glass 26 through the push rod 18 and the connecting rod 9, so that the glass cover plate and the liquid crystal glass 26 are clamped and aligned. The liquid crystal glasses 26 can be quickly bonded together, and the liquid crystal glasses 26 are tested under the action of the FPC connector 22, which is convenient for people to use. All the structures in this application can be selected according to the material and length according to the actual use situation. The drawings are all schematic structure diagrams, and the specific actual dimensions can be adjusted appropriately.

The above is only a preferred specific implementation mode of this embodiment, but the scope of protection of this embodiment is not limited thereto. Anyone familiar with the technical field within the technical scope disclosed in this embodiment Any equivalent replacement or change of the technical solutions and the inventive concepts of the examples shall fall within the scope of protection of this embodiment.

Claims (8)

1. A liquid crystal module assembly alignment fixture, comprising a base (1), characterized in that a bracket (2) is fixedly installed on the top of the base (1), and one side of the bracket (2) is fixed A positioning seat (3) is installed, and the positioning seat (3) is threadedly connected with a screw rod (4). ) is installed with a pressing plate (6) for rotation, a pressing plate (7) is arranged under the pressing plate (6), a top block (8) is installed on the pressing plate (7), and both sides of the bracket (2) are fixed A fixed plate (38) is installed, and the same transmission rod (14) is installed with rotation between the fixed plate (38) and the base (1), and the top of the base (1) is provided with a placement groove (21), and the placement groove ( 21) is equipped with an FPC connector (22) on the bottom inner wall, and the bottom inner wall of the placement groove (21) is provided with a reset mechanism, and the top of the base (1) is provided with a clamping mechanism, and the top of the base (1) The top is fixedly equipped with a placement box (25), and a plurality of liquid crystal glasses (26) are stacked in the placement box (25). The top of the base (1) is provided with a groove (27), and the inner wall of the groove (27) rotates A rotating shaft (30) is installed, and a rubber wheel (31) is sheathed on the rotating shaft (30), and the rubber wheel (31) cooperates with the liquid crystal glass (26), and the inner wall of one side of the groove (27) is fixedly installed with a The second motor (28), the output shaft of the second motor (28) is fixedly equipped with a rotating rod (29), and the rotating rod (29) is transmission-connected with the rotating shaft (30). 2. A liquid crystal module assembly alignment fixture according to claim 1, characterized in that the clamping mechanism includes a moving plate (16), a push rod (18), a connecting plate (19) , clamping plate (20) and screw mandrel (17), the top of base (1) offers the sliding groove (15) that two symmetrical settings are arranged, and screw mandrel (17) is rotationally connected with corresponding sliding groove (15), and mobile plate ( 16) Threaded connection with the corresponding screw rod (17), the two ejector rods (18) are respectively installed on the side where the two moving plates (16) are close to each other, and the two connecting plates (19) are respectively fixedly installed on the two On the side where the push rods (18) are close to each other, the two splints (20) are respectively arranged on the sides where the two connecting plates (19) are close to each other. 3. A liquid crystal module assembly alignment fixture according to claim 1, characterized in that the driving mechanism includes a first motor (5), a driving gear (12) and a driven gear (13 ), the first motor (5) is installed on the bottom of the positioning seat (3), the driving gear (12) is fixedly connected with the output shaft of the first motor (5), and the driven gear (13) is connected to the top of the positioning seat (3) Rotationally connected, and the driven gear (13) is slidably connected with the screw rod (4), and the driving gear (12) and the driven gear (13) mesh with each other. 4. A liquid crystal module assembly alignment fixture according to claim 1, characterized in that the reset mechanism includes a buffer rod (35), a reset plate (36) and a reset spring (37), The bottom inner wall of the placement groove (21) is provided with two symmetrical settings to drive the buffer groove (34), the buffer rod (35) is slidably connected with the buffer groove (34), and the reset plate (36) is fixedly installed on the buffer rod (35). At the top, the return spring (37) is fixedly installed on the bottom inner wall of the buffer tank (34), and the top of the return spring (37) is fixedly connected with the buffer rod (35). 5. A liquid crystal module assembly alignment fixture according to claim 1, characterized in that two symmetrically arranged connecting plates are slidably connected to the pressing plate (6) and the connecting plate (19). Rod (9), one end of the connecting rod (9) is fixedly equipped with a baffle (11), and the side of the two splints (20) away from each other is fixedly connected with the corresponding connecting rod (9), press the top of the plate (7) It is fixedly connected with the corresponding connecting rod (9), and the outer side of the connecting rod (9) is sleeved with a top spring (10). 6. A liquid crystal module assembly alignment fixture according to claim 1, characterized in that a first bevel gear (23) is fixedly mounted on the bottom end of the transmission rod (14), and the wire One end of the rod (17) is fixedly mounted with a second bevel gear (24), and the first bevel gear (23) meshes with the corresponding second bevel gear (24). 7. A liquid crystal module assembly alignment fixture according to claim 1, characterized in that the outer sliding sleeve of the screw (4) is provided with a first sprocket, and the drive rod (14) The outer fixed sleeve is provided with a second sprocket, the same chain is meshed with the first sprocket and the two second sprockets, and the first sprocket is rotatably connected with the positioning seat (3). 8. A liquid crystal module assembly alignment fixture according to claim 1, characterized in that a worm (33) is fixedly sleeved on the rotating rod (29), and is fixed on the rotating shaft (30). A worm wheel (32) is sheathed, and the worm (33) and the worm wheel (32) mesh with each other.

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