CN223198069U

CN223198069U - A titanium product turning device that is easy to adjust processing depth

Info

Publication number: CN223198069U
Application number: CN202422233288.9U
Authority: CN
Inventors: 张晓辉; 赵亮; 张磊
Original assignee: Yulin Yingruijie New Materials Technology Co ltd
Current assignee: Yulin Yingruijie New Materials Technology Co ltd
Priority date: 2024-09-12
Filing date: 2024-09-12
Publication date: 2025-08-08
Anticipated expiration: 2034-09-12

Abstract

The utility model relates to the technical field of titanium material processing, and discloses a titanium material product turning device convenient for adjusting processing depth, which comprises an operation table, wherein a first mounting plate is arranged at the top of the operation table, a square groove is formed in the first mounting plate, one side of the first mounting plate is fixedly connected with a mounting frame, a first motor is mounted on the mounting frame, the output end of the first motor is fixedly connected with a first screw rod, the first screw rod is in threaded connection with a threaded sleeve, the threaded sleeve is arranged in the square groove and is in sliding connection with the first mounting plate, a mounting box is fixedly connected to one side of the first mounting plate far away from the first motor, four sleeve plates are arranged in the mounting box, guide rods are respectively arranged in the four sleeve plates in a penetrating manner, the guide rods are fixedly connected with the mounting box, and the sleeve plates are in sliding connection with the guide rods. The utility model is convenient for installing and detaching the cutter head, reduces the difficulty of replacing the cutter head, has high operation speed, reduces the time cost and is convenient for adjusting the processing depth.

Description

Titanium material product turning device convenient to adjust machining depth

Technical Field

The utility model relates to the technical field of titanium material processing, in particular to a titanium material product turning device convenient for adjusting processing depth.

Background

Through retrieval, china patent grant number CN219336015U discloses a novel turning device for titanium material product production, which relates to the technical field of titanium material processing and comprises a base, a first sliding rail and a second sliding rail are sequentially and fixedly arranged on the base, a first clamping seat and a second clamping seat are symmetrically and slidingly arranged on the first sliding rail, a three-jaw air cylinder is rotationally arranged on one side of the first clamping seat, which is close to the second clamping seat, a first motor is fixedly arranged on one side of the first clamping seat, a supporting disc is fixedly arranged on the second clamping seat, a rotating shaft is rotationally arranged in the middle of the supporting disc, a clamping block is fixedly arranged at one end of the rotating shaft, which is far away from the supporting disc, a clamping assembly is arranged between the first clamping seat and the second clamping seat, a turning assembly is arranged on the second sliding rail, a first filter tank is arranged in the middle of the base, and a second filter tank is arranged on the side of the base. The application can adjust the processing position and the processing depth of the titanium material product, collect the waste materials generated by turning, improve the working environment and reduce the harm to human bodies.

The novel turning device for producing titanium material products has the defects that the cutter head is mounted on the second supporting rod through the bolts, when the quality of machining is required to be changed due to abrasion of the cutter head, the cutter head needs to be detached, the bolts need to be taken down one by one in the mounting and detaching processes, the consumed time is more, the operation difficulty is high, and the time cost is increased, so that the problem needs to be solved.

Disclosure of utility model

The utility model aims to solve the defects in the prior art, and provides a turning device for a titanium material product, which is convenient for adjusting the machining depth.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

The utility model provides a titanium material goods turning device convenient to adjust processing degree of depth, includes the operation panel, the top of operation panel is provided with first mounting panel, square groove has been seted up on the first mounting panel, one side fixedly connected with mounting bracket of first mounting panel, install first motor on the mounting bracket, the output fixedly connected with first lead screw of first motor, first lead screw threaded connection has the thread bush, the thread bush sets up in square groove, thread bush sliding connection first mounting panel, first mounting panel is in one side fixedly connected with mounting box of keeping away from first motor, the inside of mounting box is provided with four sleeve plates, four the guide bar has all been worn to the sleeve plate, guide bar fixedly connected with mounting box, sleeve plate sliding connection guide bar, four the equal fixedly connected with of sleeve plate is the same installation piece, the two ends of the installation block are respectively provided with a pressure receiving plate in a penetrating way, the two pressure receiving plates are respectively provided with a spring at one side close to each other, the pressure receiving plates are in sliding connection with the installation block, the two sides of the installation block are respectively provided with two T-shaped grooves, T-shaped plates are arranged in the T-shaped grooves, the two T-shaped plates at the same end are respectively fixedly connected with the same pressure receiving plate, the T-shaped plates are in sliding connection with the installation block, the two pressure receiving plates are fixedly connected with a limiting plate on one side, which is far away from the first motor, of each pressure receiving plate, a fixed plate is arranged on one end, which is far away from the first motor, of each mounting block, grooves which are matched with the limiting plate are formed in two sides of the fixed plate, a cutter head is arranged on one side, which is far away from the first motor, of each fixed plate through bolts, guide plates are arranged on one side, which is far away from each other, of each pressure receiving plate, the guide plates are fixedly connected with a mounting box, the tool bit position adjusting device has the advantages that the tool bit position adjusting device is adopted, and meanwhile, the tool bit can be limited and fixed, so that the pressure receiving plates can be driven to move along the inclined edges of the guide plates when the mounting plate moves, the two pressure receiving plates can be mutually close, the two limiting plates can be inserted into the grooves on the two sides of the fixing plate when the tool bit position adjusting device is capable of fixing the tool bit position, meanwhile, the position of the tool bit can be adjusted by continuously moving the mounting plate, the machining depth can be adjusted, the problem that the tool bit put forward in the background art is mounted on the second supporting rod through the bolts is effectively solved, the bolts need to be taken down one by one in the mounting and dismounting process, the consumed time is more, the operation difficulty is high, the time cost is increased, the tool bit is convenient to mount and dismount, the tool bit replacement work difficulty is reduced, the operation speed is high, the time cost is reduced, and the machining depth adjusting technical effect is convenient is achieved.

As a further scheme of the utility model, the bottom of the fixing plate is fixedly connected with a locating rod, the locating rod is sleeved with a locating plate, and the locating plate is fixedly connected with a mounting block.

As a further scheme of the utility model, the top of the operation table is fixedly connected with a first sliding rail, both sides of the first sliding rail are fixedly connected with first supporting plates, both the first supporting plates are rotatably connected with the same second screw rod, one side of one first supporting plate is fixedly connected with a second motor, and the output end of the second motor is fixedly connected with the second screw rod.

As a further scheme of the utility model, the first sliding rail is matched with the first mounting plate, the first mounting plate is sleeved with the first sliding rail, the first mounting plate is slidably connected with the second screw rod, the first mounting plate is sleeved with the second screw rod, and the first mounting plate is in threaded connection with the second screw rod.

As a further scheme of the utility model, the top of the operation table is fixedly connected with a second sliding rail, the second sliding rail is sleeved with two second mounting plates, the second mounting plates are slidably connected with the second sliding rail, the two second mounting plates are respectively provided with the same bidirectional screw rod in a penetrating way, the second mounting plates are in threaded connection with the bidirectional screw rods, one sides of the two second mounting plates, which are close to each other, are respectively and fixedly connected with a three-jaw cylinder and a supporting disc, the middle part of the supporting disc is rotatably provided with a rotating shaft, and one end, which is close to the three-jaw cylinder, of the rotating shaft is fixedly connected with a clamping block.

As a further scheme of the utility model, a fourth motor is fixedly connected to one side, far away from the three-jaw air cylinder, of the second mounting plate, and the output end of the fourth motor is fixedly connected with the three-jaw air cylinder.

As a further scheme of the utility model, the top of the operating platform is fixedly connected with two second supporting plates, the second supporting plates are sleeved on the bidirectional screw rod, the bidirectional screw rod is rotationally connected with the second supporting plates, one of the second supporting plates is fixedly connected with a third motor, and the output end of the third motor is fixedly connected with the bidirectional screw rod.

The beneficial effects of the utility model are as follows:

The utility model adopts the technical means that the position of the cutter head can be regulated and the cutter head can be limited and fixed, so that the pressure receiving plates can be driven to move along the inclined edges of the guide plates when the mounting plate moves, the two pressure receiving plates can be mutually close, the two limiting plates can be inserted into the grooves on the two sides of the fixing plate when the two pressure receiving plates are positioned, the position of the cutter head can be fixed, and the mounting plate can be continuously moved to regulate the position of the cutter head, thereby regulating the machining depth.

Drawings

FIG. 1 is a schematic perspective view of a turning apparatus for a titanium material product, which is provided by the utility model, and is convenient for adjusting the machining depth;

FIG. 2 is a schematic view of a partially developed structure of a turning apparatus for a titanium material product for facilitating adjustment of a machining depth according to the present utility model;

FIG. 3 is a schematic view showing the structure of a mounting box of a turning device for a titanium material product, which is convenient for adjusting the machining depth;

FIG. 4 is a schematic view showing a cross-sectional structure of an installation box of a turning device for a titanium material product, which is convenient for adjusting the machining depth;

FIG. 5 is a schematic view showing the development of a mounting box of a turning device for a titanium material product, which is convenient for adjusting the machining depth;

Fig. 6 is a schematic view showing a cross-sectional unfolding structure of a mounting block of a turning device for a titanium material product, which is convenient for adjusting the machining depth.

In the figure, 1, an operation table; 2, a first mounting plate, 3, a square groove, 4, a mounting rack, 5, a first motor, 6, a first screw rod, 7, a threaded sleeve, 8, a mounting box, 9, a sleeve plate, 10, a guide rod, 11, a mounting block, 12, a pressed plate, 13, a T-shaped groove, 14, a T-shaped plate, 15, a limiting plate, 16, a spring, 17, a fixing plate, 18, a tool bit, 19, a positioning plate, 20, a guide plate, 21, a positioning rod, 22, a first sliding rail, 23, a second screw rod, 24, a first supporting plate, 25, a second motor, 26, a second sliding rail, 27, a second mounting plate, 28, a two-way screw rod, 29, a three-jaw cylinder, 30, a supporting plate, 31, a rotating shaft, 32, a clamping block, 33, a second supporting plate, 34, a third motor, 35 and a fourth motor.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Referring to fig. 1-6, a turning device for titanium material products convenient for adjusting machining depth comprises an operation table 1, wherein a first mounting plate 2 is arranged at the top of the operation table 1, a square groove 3 is formed in the first mounting plate 2, one side of the first mounting plate 2 is fixedly connected with a mounting frame 4, a first motor 5 is mounted on the mounting frame 4, the output end of the first motor 5 is fixedly connected with a first screw rod 6, the first screw rod 6 is in threaded connection with a threaded sleeve 7, the threaded sleeve 7 is arranged in the square groove 3, the threaded sleeve 7 is in sliding connection with the first mounting plate 2, the first mounting plate 2 is fixedly connected with a mounting box 8 at one side far away from the first motor 5, four sleeve plates 9 are arranged in the mounting box 8, guide rods 10 are respectively arranged in a penetrating manner, the guide rods 10 are fixedly connected with the mounting box 8, the sleeve plates 9 are in sliding connection with the guide rods 10, the four sleeve plates 9 are respectively fixedly connected with the same mounting block 11, the two ends of the mounting block 11 are respectively provided with a pressure receiving plate 12 in a penetrating way, the two pressure receiving plates 12 are respectively provided with a spring 16 at one side close to each other, the pressure receiving plates 12 are in sliding connection with the mounting block 11, two T-shaped grooves 13 are respectively formed at two sides of the mounting block 11, T-shaped plates 14 at the same end are respectively fixedly connected with the same pressure receiving plate 12, the T-shaped plates 14 are in sliding connection with the mounting block 11, one ends of the two pressure receiving plates 12 far away from the first motor 5 are respectively fixedly connected with a limiting plate 15 at one side close to each other, the mounting block 11 is provided with a fixing plate 17 at one end far away from the first motor 5, grooves matched with the limiting plates 15 are respectively formed at two sides of the fixing plate 17, a cutter head 18 is respectively arranged at one side far away from the first motor 5 through bolts, the two pressure receiving plates 12 are respectively provided with a guide plate 20 at one side far away from each other, the guide plates 20 are fixedly connected with the mounting box 8, the tool bit position adjusting device has the advantages that the tool bit position adjusting device is adopted, and meanwhile, the tool bit can be limited and fixed, so that the pressure receiving plates can be driven to move along the inclined edges of the guide plates when the mounting plate moves, the two pressure receiving plates can be mutually close, the two limiting plates can be inserted into the grooves on the two sides of the fixing plate when the tool bit position adjusting device is capable of fixing the tool bit position, meanwhile, the position of the tool bit can be adjusted by continuously moving the mounting plate, the machining depth can be adjusted, the problem that the tool bit put forward in the background art is mounted on the second supporting rod through the bolts is effectively solved, the bolts need to be taken down one by one in the mounting and dismounting process, the consumed time is more, the operation difficulty is high, the time cost is increased, the tool bit is convenient to mount and dismount, the tool bit replacement work difficulty is reduced, the operation speed is high, the time cost is reduced, and the machining depth adjusting technical effect is convenient is achieved.

In this embodiment, a positioning rod 21 is fixedly connected to the bottom of the fixing plate 17, a positioning plate 19 is sleeved on the positioning rod 21, and the positioning plate 19 is fixedly connected to the mounting block 11.

In this embodiment, the top of the console 1 is fixedly connected with a first slide rail 22, two sides of the first slide rail 22 are fixedly connected with a first supporting plate 24, two first supporting plates 24 are rotatably connected with a same second screw rod 23, one side of one first supporting plate 24 is fixedly connected with a second motor 25, and the output end of the second motor 25 is fixedly connected with the second screw rod 23.

In this embodiment, the first sliding rail 22 is adapted to the first mounting plate 2, the first mounting plate 2 is sleeved with the first sliding rail 22, the first mounting plate 2 is slidably connected with the second screw rod 23, the first mounting plate 2 is sleeved with the second screw rod 23, and the first mounting plate 2 is in threaded connection with the second screw rod 23.

In this embodiment, the top fixedly connected with second slide rail 26 of operation panel 1, second slide rail 26 cover is equipped with two second mounting panels 27, second mounting panel 27 sliding connection second slide rail 26, same two-way lead screw 28 is all worn to be equipped with by two second mounting panels 27, two-way lead screw 28 of second mounting panel 27 threaded connection, two second mounting panels 27 are in one side that is close to each other fixedly connected with three-jaw cylinder 29 and supporting disk 30 respectively, the middle part rotation of supporting disk 30 is provided with pivot 31, pivot 31 is in the one end fixedly connected with grip block 32 that is close to three-jaw cylinder 29.

In this embodiment, the second mounting plate 27 close to the three-jaw cylinder 29 is fixedly connected with a fourth motor 35 at a side far from the three-jaw cylinder 29, and an output end of the fourth motor 35 is fixedly connected with the three-jaw cylinder 29.

In this embodiment, two second supporting plates 33 are fixedly connected to the top of the operating platform 1, the second supporting plates 33 are sleeved on the bidirectional screw rod 28, the bidirectional screw rod 28 is rotatably connected with the second supporting plates 33, one of the second supporting plates 33 is fixedly connected with a third motor 34, and the output end of the third motor 34 is fixedly connected with the bidirectional screw rod 28.

Working principle: the cutter head 18 in the device is fixed with the fixing plate 17 by using bolts after production so as to facilitate the subsequent replacement of the cutter head 18, when the device is used, a titanium material product to be processed can be placed at the clamping jaw of the three-jaw air cylinder 29, the three-jaw air cylinder 29 is started to clamp the titanium material product by the clamping jaw of the three-jaw air cylinder 29, the third motor 34 is started again, the output end of the third motor 34 drives the bidirectional screw rod 28 to rotate, the bidirectional screw rod 28 drives the two second mounting plates 27 to approach each other, the second mounting plates 27 move along the second sliding rail 26, the second mounting plates 27 do not deviate when moving, the two second mounting plates 27 approach each other so as to enable the three-jaw air cylinder 29 and the supporting plate 30 to move, the three-jaw air cylinder 29 drives the titanium material product to move, the supporting plate 30 moves so as to drive the rotating shaft 31 to move, the rotating shaft 31 drives the clamping block 32 to move until the clamping block 32 contacts with the titanium material product, then the second motor 25 is started, the output end of the second motor 25 drives the second screw rod 23 to rotate, the second screw rod 23 drives the first mounting plate 2 to move along the first sliding rail 22, the cutter head 18 can be moved, the cutter head 18 is moved to the position of the titanium material product, the fourth motor 35 is started to drive the three-jaw air cylinder 29 to rotate, the titanium material product can be rotated, turning can be performed, when the machining depth needs to be adjusted, the first motor 5 is started, the output end of the first motor 5 drives the first screw rod 6 to rotate, the first screw rod 6 drives the thread bush 7 to move along the square groove 3, the thread bush 7 moves to drive the mounting block 11 to move, the mounting block 11 drives the fixing plate 17 to move, the fixing plate 17 drives the cutter head 18 to move, and the position of the cutter head 18 can be adjusted, the machining depth can be adjusted, when the cutter head 18 needs to be replaced, the mounting block 11 is completely moved into the mounting box 8, the sleeve plate 9 is driven to move when the mounting block 11 moves, the sleeve plate 9 can move along the guide rod 10, the mounting block 11 cannot deviate when moving, the mounting block 11 is retracted into the mounting box 8, when the arc edge of the pressure receiving plate 12 contacts the inclined edge of the guide plate 20 and continuously moves, the springs 16 gradually stretch, the two pressure receiving plates 12 can be separated from each other, the movement of the pressure receiving plate 12 can drive the T-shaped plate 14 to move along the T-shaped groove 13, the deviation of the pressure receiving plate 12 cannot occur when moving, the movement of the pressure receiving plate 12 can drive the limiting plate 15 to move, the limiting plate 15 is moved out of the groove on the fixed plate 17, the limiting plate 15 can be completely moved out of the groove on the fixed plate 17 after the mounting block 11 is completely retracted into the mounting box 8, the fixing plate 17 can be taken out, the cutter head 18 can be taken down, a new cutter head 18 is replaced, the fixing plate 17 connected with the new cutter head 18 is installed in the mounting block 11, the positioning rod 21 is aligned with the positioning plate 19 to be positioned, the first screw rod 6 is rotated, the mounting block 11 is moved a small distance away from the first motor 5, the pressure receiving plate 12 is contacted with the inclined edge of the guide plate 20 again, the two pressure receiving plates 12 are moved along the inclined edge of the guide plate 20, the two pressure receiving plates 12 are mutually close, the spring 16 can be contracted by the pressure receiving plates 12, the two limiting plates 15 can be moved into the groove on the fixing plate 17, the fixing plate 17 can be limited and fixed, the position of the mounting block 11 can be adjusted according to the same steps, and the position of the cutter head 18 can be adjusted, and the machining depth can be adjusted.

Spatially relative terms, such as "above," "upper" and "upper surface," "above" and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the process is carried out, the exemplary term "above" may be included. Upper and lower. Two orientations below. The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a titanium material goods turning device convenient to adjust processing degree of depth, includes operation panel (1), a serial communication port, the top of operation panel (1) is provided with first mounting panel (2), square groove (3) have been seted up on first mounting panel (2), one side fixedly connected with mounting bracket (4) of first mounting panel (2), install first motor (5) on mounting bracket (4), the output fixedly connected with first lead screw (6) of first motor (5), first lead screw (6) threaded connection has thread bush (7), thread bush (7) set up in square groove (3), thread bush (7) sliding connection first mounting panel (2), one side fixedly connected with mounting box (8) of first mounting panel (2) in keeping away from first motor (5), the inside of mounting box (8) is provided with four sleeve plates (9) all wear to be equipped with guide bar (10), guide bar (10) fixedly connected with mounting box (8), sleeve plates (9) set up in square groove (3), guide bar (11) both ends (11) are all worn by the clamp plate (11) to the same piece that is connected, two the clamp plate (12) all is provided with spring (16) in one side that is close to each other, clamp plate (12) sliding connection installation piece (11), two T-shaped groove (13) have all been seted up to the both sides of installation piece (11), be provided with T-shaped plate (14) in T-shaped groove (13), be in two with the equal fixed connection of T-shaped plate (14) same clamp plate (12), T-shaped plate (14) sliding connection installation piece (11), two clamp plate (12) keep away from one end of first motor (5) in one side that is close to each other all fixedly connected with limiting plate (15), install piece (11) and be provided with fixed plate (17) in the one end that is kept away from first motor (5), the groove with limiting plate (15) looks adaptation is seted up to the both sides of fixed plate (17), fixed plate (17) are in one side that is kept away from first motor (5) through bolt-mounted (18), two clamp plate (12) all are provided with deflector (20) in one side that is kept away from each other, deflector (8) fixed connection dress box.

2. The turning device for the titanium material product, which is convenient to adjust the machining depth, according to claim 1, wherein a positioning rod (21) is fixedly connected to the bottom of the fixing plate (17), the positioning rod (21) is sleeved with a positioning plate (19), and the positioning plate (19) is fixedly connected with the mounting block (11).

3. The turning device for the titanium material product convenient to adjust the machining depth according to claim 1, wherein a first sliding rail (22) is fixedly connected to the top of the operating table (1), first supporting plates (24) are fixedly connected to two sides of the first sliding rail (22), the same second screw rod (23) is rotatably connected to two first supporting plates (24), a second motor (25) is fixedly connected to one side of one first supporting plate (24), and the output end of the second motor (25) is fixedly connected to the second screw rod (23).

4. The turning device for the titanium material product, which is convenient to adjust the machining depth, according to claim 3, wherein the first sliding rail (22) is matched with the first mounting plate (2), the first mounting plate (2) is sleeved with the first sliding rail (22), the first mounting plate (2) is slidably connected with the second screw rod (23), the first mounting plate (2) is sleeved with the second screw rod (23), and the first mounting plate (2) is in threaded connection with the second screw rod (23).

5. The titanium material product turning device convenient to adjust machining depth according to claim 1, wherein a second sliding rail (26) is fixedly connected to the top of the operating table (1), two second mounting plates (27) are sleeved on the second sliding rail (26), the second mounting plates (27) are slidably connected with the second sliding rail (26), two second mounting plates (27) are all provided with the same bidirectional screw rod (28) in a penetrating mode, the second mounting plates (27) are in threaded connection with the bidirectional screw rod (28), three-jaw air cylinders (29) and supporting discs (30) are fixedly connected to one sides, close to each other, of the two second mounting plates (27), a rotating shaft (31) is arranged in the middle of each supporting disc (30) in a rotating mode, and one end, close to the three-jaw air cylinders (29), of each rotating shaft (31) is fixedly connected with a clamping block (32).

6. The turning device for the titanium material product, which is convenient to adjust the machining depth, according to claim 5, wherein a fourth motor (35) is fixedly connected to the second mounting plate (27) close to the three-jaw cylinder (29) on one side far away from the three-jaw cylinder (29), and the output end of the fourth motor (35) is fixedly connected to the three-jaw cylinder (29).

7. The turning device for the titanium material product, which is convenient to adjust the machining depth, according to claim 1, wherein two second supporting plates (33) are fixedly connected to the top of the operating table (1), the second supporting plates (33) are sleeved on the bidirectional screw rod (28), the bidirectional screw rod (28) is rotatably connected with the second supporting plates (33), one of the second supporting plates (33) is fixedly connected with a third motor (34), and the output end of the third motor (34) is fixedly connected with the bidirectional screw rod (28).