TWI784567B - push rod device - Google Patents

Abstract

A push rod device includes a rotating shaft, a driving motor and a telescoping assembly. The driving motor is connected with the rotating shaft to drive the rotating shaft to rotate. The telescopic assembly can movably set the rotating shaft, and when the rotating shaft rotates, the telescopic assembly can telescopically move along the extending direction of the rotating shaft.

Description

push rod device

The invention relates to a push rod device, in particular to a push rod device with convenient operation.

Existing push rod devices usually use air cylinders, hydraulic cylinders or mechanical push rods as power sources to push objects to be pushed to reciprocate back and forth. However, the storage volume required for the liquid or gas of the air cylinder or hydraulic cylinder is relatively large, and pipelines for transporting gas/liquid need to be installed in use, which takes up more space and is more difficult to install, so there is still room for improvement.

Therefore, one of the objectives of the present invention is to provide a push rod device that is easy to operate and simple in structure.

Therefore, the push rod device of the present invention includes a rotating shaft, a driving motor and a telescopic assembly. The driving motor is connected with the rotating shaft to drive the rotating shaft to rotate. The telescopic assembly is movably arranged on the rotating shaft, and when the rotating shaft rotates, the telescopic assembly can telescopically move along the extending direction of the rotating shaft.

In some embodiments, the telescoping assembly includes a bearing seat through which the rotating shaft can rotatably pass, an outer sleeve fixedly connected to the bearing seat, a collar movably sleeved on the rotating shaft, and a The inner sleeve of the collar is fixedly connected in the outer sleeve.

In some implementations, the telescopic assembly also has a first sealing member that is fixedly connected to the collar member and sleeved between the rotating shaft and the outer sleeve, and is sleeved at the end of the rotating shaft away from the bearing seat and The second seal between the inner sleeve.

In some embodiments, the outer wall of the inner sleeve is recessed to form a plurality of positioning grooves, and the positioning grooves can be engaged by a plurality of corresponding positioning blocks, so that the inner sleeve can be positioned relative to the rotating shaft.

In some embodiments, the telescoping assembly includes a bearing seat through which the rotating shaft is rotatably passed, a collar movably sleeved on the rotating shaft, and an inner sleeve fixedly connected to the collar.

In some embodiments, the telescoping assembly further has a second sealing element set between the end of the rotating shaft away from the bearing seat and the inner sleeve.

In some embodiments, the telescopic assembly also has a plurality of locking blocks protruding outward from the outer wall of the inner sleeve, and the locking blocks can be engaged by a plurality of corresponding positioning blocks, so that the inner sleeve can Position relative to this axis.

In some embodiments, the outer wall of the inner sleeve is recessed to form a plurality of positioning grooves, and the positioning grooves can be engaged by a plurality of corresponding positioning blocks, so that the inner sleeve can be positioned relative to the rotating shaft.

In some implementation aspects, the blocks are respectively arranged on two sides of the inner sleeve, and the blocks on each side are arranged continuously with each other.

In some embodiments, it also includes a steering tooth fixedly sleeved on the inner sleeve The blocks are respectively arranged on both sides of the inner sleeve and each side is located on the upper and lower sides of the steering gear.

In some embodiments, it also includes a steering gear fixedly sleeved on the inner sleeve.

In some embodiments, a cylinder seat is also included, and the cylinder seat is movably passed through by the inner sleeve.

In some implementation aspects, a speed reduction mechanism is further included, and the speed reduction mechanism is connected with the driving motor and the rotating shaft.

In some embodiments, the reduction mechanism is a planetary gear assembly.

The push rod device of the present invention includes a telescopic assembly, including an inner rod and an outer cylinder movably sleeved on the inner rod; a first magnetic unit, arranged at the end of the inner rod; and a second magnetic unit, arranged In the outer cylinder and corresponding to the position of the first magnetic unit; wherein, the first magnetic unit and the second magnetic unit attract or repel each other by magnetic force, so as to drive the outer cylinder to move telescopically along the inner rod .

In some embodiments, both the first magnetic unit and the second magnetic unit are electromagnet components.

In some implementations, each electromagnet assembly has an extension column, an insulator unit disposed on the extension column, a core member disposed in the insulator unit, and a core member disposed in the insulator unit surrounding the core member. For the coil, one extension column is fixedly connected to the inner rod, and the other extension column is fixedly connected to the outer cylinder.

In some implementations, each extension column has a body portion and a cover portion connected to the end of the body portion and having a diameter larger than the body portion, the insulator unit includes an insulating outer cylinder set on the extension column, an The insulating outer cylinder covers the colloid of the core and the coil and two clip covers together, one of which is arranged between the colloid and the insulating outer cylinder, and the other of which is arranged between the colloid and the insulating outer cylinder. between the lids.

In some embodiments, the first magnetic unit is an electromagnet assembly, and the second magnetic unit is a permanent magnet.

In some implementations, each electromagnet assembly has an extension column fixed to the inner rod, an insulator unit disposed on the extension column, a core member disposed in the insulator unit, and an insulator unit disposed on the insulator A coil surrounding the core within the unit.

In some implementations, the extension column has a body portion and a cover portion connected to the end of the body portion and having a diameter larger than the body portion, the insulator unit includes an insulating outer cylinder set on the extension column, and a The insulating outer cylinder covers the colloid of the core and the coil and two clip covers together, one of which is arranged between the colloid and the insulating outer cylinder, and the other of which is arranged between the colloid and the said insulating outer cylinder. between the lids.

In some embodiments, it also includes a steering gear fixedly sleeved on the outer cylinder.

In some embodiments, it also includes a steering gear fixedly sleeved on the inner rod.

In some embodiments, it also includes a cylinder seat, and the cylinder seat is movably passed through by the outer cylinder.

In some implementation aspects, the outer cylinder recess is formed with a plurality of positioning grooves, and the positioning The groove can be engaged by a plurality of corresponding positioning blocks, so that the outer cylinder can be positioned relative to the inner rod.

In some embodiments, it also includes a plurality of clamping blocks protruding outward from the outer wall of the outer cylinder, and these clamping blocks can be engaged by a plurality of corresponding positioning blocks, so that the outer cylinder can be positioned relative to the inner rod. position.

In some embodiments, the blocks are respectively arranged on two sides of the outer cylinder, and the blocks on each side are arranged continuously with each other.

In some embodiments, it further includes a steering gear fixedly sleeved on the outer cylinder, and the blocks are respectively arranged on two sides of the outer cylinder and each side is located on the upper and lower sides of the steering gear.

In some embodiments, the inner rod is recessed to form a plurality of positioning grooves, and the positioning grooves can be engaged by a plurality of corresponding positioning blocks, so that the inner rod can be positioned relative to the outer cylinder.

In some implementations, the core can be one of a soft iron core, a nanoscale rare earth structure, and a laminated silicon steel sheet structure.

The present invention has at least the following effects: the telescopic assembly can move along the extending direction of the rotating shaft by the driving motor to rotate the rotating shaft to achieve the function of pushing objects. It is very convenient to use, and the simple structure can effectively save installation costs. The space required and the difficulty of installation.

10A~10R: push rod device

1: Shaft

11: First gear

12: Second gear

13: Extension shaft

2: Drive motor

3: telescopic components

30: Bearing

31: bearing seat

32: Outer casing

341: positioning groove

33: Collar piece

34: inner sleeve

35: First seal

36: Second seal

37: snap ring

38, 38': fixed nut

39, 39': block

4: Push rod mechanism

41: Joining parts

42: Connecting rod

43: Top push rod

44: Steering ball joint

45: lock nut

5: inner rod

51: positioning groove

6: Outer cylinder

61, 61': block

7: cylinder seat

71: abutment ring

8: Electromagnet assembly

81: Extension column

811: Body Department

812: cover

82: insulating outer cylinder

83: core piece

84: Coil

85: colloid

86: card cover

9: Steering unit

91: Suspension components

911: Steering knuckle

912: support arm

913: extension frame

913a:Spindle

913b: Pivot axis

913c: Extended Steering Gear

914: shock absorber

915: connecting column

916:Shock-absorbing steering gear

92: Drive gear

93: Steering motor

20: Steering gear

100, 100’, 100”, 100A: steering system

200, 200’: deceleration switching mechanism

300: brake device

301:brake drum

302: hooves

303: Cam

304: Elastic parts

305: putter

306: linkage rod

400: Extended range system

401: Extended range component

401a: first fuel input part

402a: Second fuel input

402: First fuel storage device

403: First fuel source control device

4031: The first action unit

4032: The second action unit

404: The first humidifier

405: First fuel source auxiliary control device

406: The first pressure balance valve

407: Air compressor

408: Pressure regulating valve

409: Air Dryer

410: Multi-circuit protection valve

411: discharge valve

A1: Axle unit

A11: The first shaft section

A12: Second shaft section

A13:Universal joint

B: positioning block

M: wheel motor

m: permanent magnet

P: deceleration mechanism

P1: The first speed change mechanism

P11: sun gear

P12: Planetary gear

P13: ring gear

P14: Switch mechanism

P141: Toggle Ring

P142: Engaging Gears

P143: Driver

P144: Locating pin

P145: Connecting Gears

P146: Switch gear

P15: Planet carrier

W: wheel

Other features and effects of the present invention will be clearly presented in the implementation manner with reference to the drawings, wherein: Fig. 1 is a partial cross-sectional schematic view of a first embodiment of the push rod device of the present invention; Fig. 2 is the first embodiment of the push rod device A schematic cross-sectional view of part of the embodiment, illustrating the elongated shape of the first embodiment State; Fig. 2A is a partial cross-sectional view of a variant of the first embodiment of the push rod device of the present invention; Fig. 3 is a partial cross-sectional view illustrating that the first embodiment is applied to a steering system; Fig. 4 is a Schematic diagram illustrating that the first embodiment is applied to a deceleration switching mechanism; FIG. 4A is a schematic diagram illustrating that the first embodiment is applied to another deceleration switching mechanism; FIG. 5 is a schematic block diagram illustrating that the first embodiment is applied to A range-extending system; Fig. 6 is a schematic sectional view of a part, illustrating another modification of the first variation; Fig. 7 is a schematic sectional view of a part of a second embodiment of the push rod device of the present invention; Fig. 8 and Fig. 9 is a schematic diagram illustrating that the first embodiment is applied to a brake device; Fig. 10 is a partial cross-sectional schematic diagram of a third embodiment of the push rod device of the present invention; Fig. 10A is the third implementation of the push rod device of the present invention Figure 11 is a partial sectional view of a fourth embodiment of the push rod device of the present invention; Figure 11A is a schematic view of a change of the third embodiment of the push rod device of the present invention Part of the cross-sectional schematic diagram; Figure 12 is a side view schematic diagram of the third embodiment of the push rod device of the present invention applied to a steering system; Figure 13 is a partial cross-sectional schematic view of a fifth embodiment of the push rod device of the present invention; 14 is a partial sectional schematic view of a sixth embodiment of the push rod device of the present invention, illustrating these Electromagnet assembly; Figure 14A is a partial sectional view of a first variation of the sixth embodiment, illustrating these electromagnet assemblies; Figure 14B is a partial sectional view of a second variation of the sixth embodiment, illustrating The electromagnet assemblies; Figure 14C is a schematic side view of a third variation of the sixth embodiment of the push rod device of the present invention; Figure 14D is a third embodiment of the sixth embodiment of the push rod device of the present invention A schematic side view of a variation; FIG. 15 is a schematic side view illustrating that a seventh embodiment of the push rod device of the present invention is applied to a steering system; FIG. 16 is a part of an eighth embodiment of the push rod device of the present invention Fig. 17 is a schematic sectional view of a part of a ninth embodiment of a push rod device of the present invention; Fig. 18 is a schematic sectional view of a part of a tenth embodiment of a push rod device of the present invention; Fig. 18A is a schematic sectional view of a part of a push rod device of the present invention; A partial cross-sectional schematic view of a first variation of the tenth embodiment of the rod device; FIG. 18B is a partial cross-sectional schematic view of a second variation of the tenth embodiment of the push rod device of the present invention; FIG. 18C is the present invention A partial cross-sectional schematic diagram of a third variation example of the tenth embodiment of the inventive push rod device; Fig. 18D is a schematic sectional view of a part of a fourth variation of the tenth embodiment of the push rod device of the present invention; Fig. 19 is a schematic sectional view of a part of an eleventh embodiment of the push rod device of the present invention; Fig. 20 is A partial sectional view of a twelfth embodiment of the pusher device of the present invention; FIG. 21 is a partial sectional view of a thirteenth embodiment of the pusher device of the present invention; FIG. 22 is a partial sectional view of the pusher device of the present invention A partial cross-sectional schematic view of the fourteenth embodiment; FIG. 23A is a partial cross-sectional schematic view of a fifteenth embodiment of the push rod device of the present invention; FIG. 23B is a first view of the fifteenth embodiment of the push rod device of the present invention Part of the cross-sectional schematic diagram of the variation; FIG. 24 is a partial cross-sectional schematic diagram of a second variation of the fifteenth embodiment of the push rod device of the present invention; FIG. 25 is a sixteenth embodiment of the push rod device of the present invention Figure 26A is a schematic side view of an extension frame of a steering unit of a steering system; Figure 26B is a schematic top view of the extension frame; Figure 27A is the extension of the steering unit of the steering system A schematic side view of a modified form of the frame; Figure 27B is a schematic top view of the modified form of the extension frame; and Figure 28 is a schematic side view illustrating the sixth embodiment of the push rod device of the present invention This third variation is applied to a steering system.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same numerals.

Referring to FIG. 1 and FIG. 2 , a first embodiment of a push rod device 10A of the present invention includes a rotating shaft 1 , a driving motor 2 , a telescoping assembly 3 and a speed reduction mechanism P.

The driving motor 2 is connected to the rotating shaft 1 for driving the rotating shaft 1 to rotate. The telescopic assembly 3 is movably arranged on the rotating shaft 1 . When the rotating shaft 1 rotates, the telescoping assembly 3 can reciprocate and telescopically move along the extending direction of the rotating shaft 1 . The telescopic assembly 3 includes a bearing seat 31 through which the rotating shaft 1 can rotate, a bearing 30 arranged on the bearing seat 31, an outer sleeve 32 fixedly connected to the bearing seat 31, and a sleeve movably sleeved on the bearing seat 31. The collar part 33 of the rotating shaft 1, an inner sleeve 34 fixed to the collar part 33 in the outer sleeve 32, an inner sleeve 34 fixed to the collar part 33 and sleeved between the rotating shaft 1 and the outer sleeve 32 The first sealing member 35 and the second sealing member 36 are set between the end of the rotating shaft 1 away from the bearing seat 31 and the inner sleeve 34 . In this embodiment, the reduction mechanism P can be a planetary gear assembly, but it is not limited thereto. The collar 33 is threaded on the rotating shaft 1 . When the rotating shaft 1 rotates, the collar 33 and the inner sleeve 34 of the telescoping assembly 3 can move back and forth along the extending direction of the rotating shaft 1 .

Referring to Fig. 2A, the push rod device 10A-1 of the present invention is a first variation of the first embodiment, which is similar to the first embodiment, the difference is that the push rod device 10A-1 also includes a The steering gear 20 of the inner sleeve 34 .

Referring to FIG. 3 , the push rod device 10A of the present invention can be applied to a steering system 100 of a vehicle, which includes a wheel motor M, a first transmission mechanism P1 , a wheel axle unit A1 and a push rod mechanism 4 . wheel The axle unit A1 is connected to the wheel motor M and a wheel W of the vehicle, and the wheel motor M drives the wheel W of the vehicle to rotate through the axle unit A1. The axle unit A1 includes a first axle section A11 connected to the wheel motor M, a second axle section A12 connected to the wheel W, and a universal joint A13 disposed between the first axle section and the second axle section. The push rod mechanism 4 includes a joint 41 arranged at the end of the inner sleeve 34, a connecting rod 42 connected to the joint 41, a push rod 43 screwed to the connecting rod 42, and a push rod 43 arranged on the top. One end of the push rod 43 engages the steering ball joint 44 of the wheel W. The connecting member 41 can be, for example, a universal joint A13 , so that the connecting rod 42 can freely rotate relative to the collar member 33 through the connecting member 41 . One end of the connecting rod 42 is engaged with the joint member 41 , and the other end is threaded and screwed to the push rod 43 . The push rod 43 can move axially relative to the connecting rod 42 by screwing to adjust the total length of the push rod mechanism 4, and the connecting rod 42 and the push rod 42 can be pushed together by a locking nut 45. The rod 43 is fixed to prevent relative axial movement of the two. In this embodiment, the first transmission mechanism P1 can be a planetary gear assembly, but it is not limited thereto.

Referring to FIG. 4 , the push rod device 10A of the present invention can be applied to a reduction switching mechanism 200 , and can be movably arranged on the ring gear of the planetary gear assembly. The planetary gear assembly has a sun gear P11, a planetary gear P12 surrounding the sun gear P11, a ring gear P13 located at the outermost ring, and a planetary carrier P15 connected to the planetary gear P12. The switching mechanism P14 can movably hold the ring gear P13, and has a switching ring P141, an engaging gear P142 arranged on the surface of the switching ring P141 facing the ring gear P13, two fixed to the vehicle body and passing through the The positioning pin P144 of the switching ring P141 and two driving parts P143 that can drive the switching ring P141 to move toward or away from the ring gear P13 along the positioning pin P144. The engaging gear P142 can mesh with a connecting gear P145 engaged with the ring gear P13, thereby fixing the ring gear P13. Once the ring gear P13 is fixed, the planetary gear assembly can provide a boost to the wheel 100. Provides a large deceleration effect. When the switching ring P141 drives the engagement gear P142 away from the ring gear and disengages from it, the ring gear P13 is not fixed at this time. The switching mechanism P14 is used to control whether the ring gear P13 is fixed. When the ring gear P13 is not fixed, the planetary gear assembly cannot provide acceleration or deceleration for the wheel 100 . The push rod device 10A of the present invention can be used as a replacement for the driving member P143, and can drive the switching ring P141 to move toward or away from the ring gear P13 along the positioning pin P144. Wherein, the number of positioning pins P144 is not limited to two, and in other embodiments, there may be other numbers, as long as there is at least one.

Referring to FIG. 4A, the push rod device 10A of the present invention can also be applied to a deceleration switching mechanism 200', which is similar to the deceleration switching mechanism 200. The ring gear P13 and the deceleration switching mechanism 200 ′ are driven by the driving part P143 via the connecting rod 42 and the joint part 41 to push the switching gear P146 to move along the left and right directions in the figure. When the switching gear P146 meshes with the connecting gear P145 of the ring gear P13 and the engaging gear P142 of the switching ring P141 at the same time, the ring gear P13 is fixed, and the function of large deceleration or large acceleration can be produced. If the switching gear P146 moves to the right and only engages the engaging gear P142 of the switching ring P141, and is separated from the connecting gear P145 of the ring gear P13, the ring gear P13 is not fixed and can be directly driven.

Referring to FIG. 5 , the push rod device 10A of the present invention can also be applied to a range extender system 400 . The range extender system 400 includes a range extender assembly 401, a first fuel storage device 402, a first fuel source control device 403, a first humidifier 404, a first fuel source auxiliary control device 405, a first pressure Balance valve 406 , an air compressor 407 , a pressure regulating valve 408 , an air dryer 409 , a multi-circuit protection valve 410 and a discharge valve 411 . The range extender assembly 401 includes a first fuel input part 401a and a second fuel input part 401b. The first fuel input part 401a is used for receiving a first fuel source, and the second fuel input part 401b is used for to receive a second fuel source different from the first fuel source. The first fuel source and the second fuel source are mixed in the range extender assembly 401 to generate electrical output. The range extender system 400 can be installed on a vehicle, such as a vehicle, a ship, an airplane and the like that can carry a range extender, and the vehicle uses at least the range extender 401 as a power source (for example, the vehicle can be a hybrid electric vehicle), the fuel is sent to the range extender assembly 401 to be further converted into electric energy to provide the main power supply of the vehicle or to charge the main power supply to increase the mileage as the range extender system. The first fuel source may be, for example, oxygen or air, and the second fuel source may be, for example, hydrogen, but not limited thereto.

The first fuel storage device 402 is used to store the first fuel source and provide it to the first fuel input part 401a, and includes air storage cylinders 402a, 402b, 402c, 402e. The air reservoirs 402a, 402b, 402c, 402e are directly connected to the first fuel source control device 403 . The first fuel source control device 403 is connected between the air storage tanks 402 a - 402 e of the first fuel storage device 402 and the first humidifier 404 , and has a first actuating unit 4031 and a second actuating unit 4032 . The push rod device 10A of the present invention is connected to the first actuating unit 4031 , and the first actuating unit 4031 is linked to the second actuating unit 4032 . When the first actuating unit 4031 is pushed by the push rod device 10A, the first fuel input part 401a can receive the first fuel source from the first fuel storage device 402 . In this way, when the vehicle needs to be accelerated faster, the driver can operate the push rod device 10A and continue to push the first actuating unit 4031 and link the second actuating unit 4032 . At the same time, the first fuel source is received from the first fuel storage device 402 and chemically reacts with the second fuel source in the range extender assembly 401 to increase power supplement for acceleration purposes.

The first humidifier 404 is connected between the first fuel storage device 402 and the first fuel input part 401a, which can make the fuel supplied to the range extender 401 contain some water vapor, and supplement the fuel in the range extender 401 The moisture contained in the polymer electrolyte membrane (such as ion exchange membrane) can avoid voltage drop and reduce the probability of battery damage.

The first fuel source auxiliary control device 405 communicates between the first fuel storage device 402 and the first humidifier 404 and is connected to the push rod device 10A of the present invention. When the first fuel source auxiliary control device 405 is pushed by the push rod device 10A, the first fuel input part 401a can receive the first fuel source from the first fuel storage device 402 . In this way, when the central control device of the vehicle detects that the power is insufficient, the driver can operate the push rod device 10A to drive the first fuel source auxiliary control device 405 to quickly receive the first fuel source from the first fuel storage device 402 And a chemical reaction occurs with the second fuel source in the range extender component 401 to supplement the electric power.

The first pressure balance valve 406 is disposed under the chassis of the vehicle, actuated according to the weight of the vehicle, and communicated between the first fuel storage device 402 and the first humidifier 404 . In this way, as the carrying weight of the vehicle increases, the first pressure balance valve 406 can be driven to open, so that the first fuel of the first fuel storage device 402 can be delivered to the first fuel input part 401a, thereby increasing the electric energy of the range extender assembly 401 output. The air compressor 407 communicates with the atmosphere to compress air into the first fuel source. The pressure regulating valve is arranged between the air compressor 407 and the first fuel storage device 402, and is used to adjust the pressure of the first fuel source, so as to prevent the pipelines connected between the components from being ruptured due to excessive pressure, thereby causing Danger of air leakage. The air dryer 409 is connected between the air compressor 407 and the first fuel source control device 403 for removing moisture in the air compressed by the air compressor 407 . The discharge valve 411 is respectively connected between the atmosphere and the air storage tanks 402a, 402b, 402c, 402e, so that the condensed water in the air storage tanks 402a, 402b, 402c, 402e can be discharged into the atmosphere, and the air storage tanks 402a, 402b can be kept , the pressure inside 402c, 402e force.

The multi-circuit protection valve 410 is connected between the air compressor 407 and the air storage tanks 402a, 402b, 402c, 402e. It can control whether the air storage tanks 402a, 402b are connected to the first fuel source control device 403 according to a pressure threshold. Specifically, when the actual pressure value is lower than the pressure threshold value, the multi-circuit protection valve 410 is closed, and when the actual pressure value is greater than or equal to the pressure threshold value, the multi-circuit protection valve 410 is in the open state.

It should be noted that the pipeline structure shown in Figure 5 is to illustrate the connection relationship between the first fuel source and other components, while the part of the second fuel source is similar to the first fuel source, and can also be connected with the range extender assembly 401, a The second fuel storage device, a second fuel source control device, a second humidifier, a second fuel source auxiliary control device, a second pressure balance valve and other components cooperate to enable the second fuel source to be delivered to the booster. The process component 401 produces a chemical reaction with the first fuel source. The second fuel source auxiliary control device can also be connected to the push rod device 10A of the present invention. When the second fuel source auxiliary control device is pushed by the push rod device 10A, the second fuel input part can receive the second fuel from the second fuel storage device. fuel source.

Referring to Fig. 6, the first embodiment has a modified form, the driving motor 2 of the push rod device 10B is changed to be parallel to the rotating shaft 1 and located on a different straight line, and the two are fixedly sleeved on the rotating shaft 1, a second gear 12 meshing with the first gear 11 that can be driven by the drive motor 2 and an extension shaft 13 that is fixedly sleeved by the second gear 12 are engaged and interlocked, when the drive motor 2 When the extension shaft 13 and the second gear 12 are driven to rotate, the first gear 11 and the shaft 1 can be driven to rotate, and the ring member 33 together with the inner sleeve 34 can also be driven to move along the shaft 1 .

Referring to Fig. 7, a second embodiment of a push rod device 10C of the present invention, which is the same as the first embodiment The embodiment is similar, the difference is that the inner sleeve 34 of the second embodiment is concavely formed with a plurality of positioning grooves 341, and these positioning grooves 341 can be engaged by a plurality of corresponding positioning blocks B, so that the inner sleeve 34 It can be positioned relative to the rotating shaft 1 .

Referring to Fig. 8 and Fig. 9, the push rod device 10C of the present invention can be applied to a brake device 300 of a vehicle, which includes a brake drum 301, two shoes 302, a rotatable cam 303, and two ends respectively connected to each other. The elastic member 304 of the shoes 302 , a push rod 305 connected to the push rod device 10C and a link rod 306 linked to the cam 303 . The push rod 305 is connected to the inner sleeve 34 of the push rod device 10C, so that when the inner sleeve 34 moves along the shaft 1, it will synchronously drive the push rod 305, and the push rod 305 drives the cam 303 through the linkage rod 306 Rotate, so that the shoes 302 contact the brake drum 301 to limit the rotation of the brake drum 301, so as to achieve the effect of braking and deceleration.

Referring to Fig. 10, a third embodiment of the push rod device 10D of the present invention is similar to the first embodiment, the difference is that the third embodiment omits the outer sleeve 32 and the snap ring 37, and the bearing seat 31 and the bearing 30 is set in the opposite direction, so a nut 38 ′ is additionally set to fix the bearing 30 . When the rotating shaft 1 is driven to rotate by the driving motor 2 , the collar member 33 and the inner sleeve 34 can be driven to move along the rotating shaft 1 .

Referring to Fig. 10A, the push rod device 10D-1 of the present invention is a first modification of the third embodiment, which is similar to the third embodiment, the difference is that the push rod device 10D-1 also includes a The steering gear 20 of the inner sleeve 34 .

Referring to Fig. 11, a fourth embodiment of the push rod device 10E of the present invention is similar to the third embodiment, the difference is that the telescopic assembly 3 of the fourth embodiment also has a plurality of The outer wall of 34 faces outwardly protruding locking blocks 39 , and these locking blocks 39 can be engaged with a plurality of corresponding positioning blocks B, so that the inner sleeve 34 can be positioned relative to the rotating shaft 1 . The locking blocks 39 are respectively disposed on two sides of the inner sleeve 34 , and the locking blocks 39 on each side are arranged continuously with each other.

Referring to Fig. 11A, the push rod device 10E-1 of the present invention is a first variation of the fourth embodiment, which is similar to the third embodiment, the difference is that the inner sleeve 34 of the telescopic assembly 3 is recessed to form a plurality of positioning The grooves 341 , the positioning grooves 341 can be engaged by a plurality of corresponding positioning blocks B, so that the inner sleeve 34 can be positioned relative to the rotating shaft 1 .

12, the push rod device 10D-1 of the present invention can be applied to a steering system 100' of a vehicle, which includes a wheel motor M, a first speed change mechanism P1, a wheel axle unit A1 and a steering unit 9. The axle unit A1 is connected to the wheel motor M and a wheel W of the vehicle, and the wheel motor M drives the wheel W of the vehicle to rotate through the axle unit A1. The axle unit A1 includes a first axle section A11 connected to the wheel motor M, a second axle section A12 connected to the wheel W, and a universal joint A13 disposed between the first axle section and the second axle section. The steering unit 9 includes a suspension assembly 91 arranged on the vehicle body (not shown) of the vehicle and connected to the wheels W, at least one driving gear 92 connected to the suspension assembly 91 and at least one The steering motor 93 is used to drive the driving gear 92 to rotate. The suspension assembly 91 includes a steering knuckle 911 through which the axle unit A1 passes and connects the wheels, and two pairs of support arms 912 connecting the upper and lower ends of the steering knuckle 911 . When the driving gear 92 rotates, it will drive the steering gear 20 to rotate to drive the push rod device 10D-1, the support arm 912, the steering knuckle 911 and the wheel W to rotate, so as to achieve the steering effect of the wheel W. Purpose. When the rotating shaft 1 rotates, the collar member 33 of the telescoping assembly 3 together with the inner sleeve 34 moves back and forth along the extending direction of the rotating shaft 1, driving the suspension assembly 91 relative to the vehicle. The body moves up and down. In this embodiment, the first transmission mechanism P1 can be a planetary gear assembly, but it is not limited thereto.

Referring to Figure 10 and Figure 13, a fifth embodiment of the push rod device 10F of the present invention is similar to the third embodiment, the difference is that the telescopic assembly 3 of the fifth embodiment also has a plurality of The outer wall of the cylinder 34 faces outwardly protruding blocks 39', which are respectively arranged on both sides of the inner sleeve 34 and are located on the upper and lower sides of the steering gear 20 on each side, and can be used for multiple The corresponding positioning block B is engaged so that the inner sleeve 34 can move, rotate and be positioned relative to the rotating shaft 1 . By engaging the positioning block B with the locking blocks 39', it can help to share the axial stress borne by the rotating shaft 1, the lifting collar member 33 and the inner sleeve 34, thereby increasing the service life. Wherein, the number of positioning blocks B is not limited to three pairs in this embodiment, and may be other numbers in other embodiments, as long as there is at least one pair.

Referring to FIG. 14 , a sixth embodiment of the push rod device 10G of the present invention includes a telescopic assembly, a first magnetic unit and a second magnetic unit. The telescopic assembly includes an inner rod 5 and an outer cylinder 6 .

The outer cylinder 6 is movably sleeved on the inner rod 5 . The first magnetic unit is arranged at the end of the inner rod 5 , and the second magnetic unit is arranged in the outer cylinder 6 and corresponds to the position of the first magnetic unit. The first magnetic unit and the second magnetic unit attract or repel each other by magnetic force, so as to drive the outer cylinder 6 to move telescopically along the inner rod 5 . In this embodiment, both the first magnetic unit and the second magnetic unit are electromagnet components 8 . Each electromagnet assembly 8 has an extension column 81, an insulator unit set on the extension column 81, a core member 83 arranged in the insulator unit, and a coil surrounding the core member 83 in the insulator unit 84, one of the extension columns 81 is fixed to the inner rod 5, and the other is fixed to the outer cylinder 6. Each extension post 81 has a main body portion 811 and an end connected to the main body portion 811 with a diameter larger than the main body portion 811. The cover portion 812 of the body portion 811 . In this embodiment, the insulator unit includes an insulating outer cylinder 82 set on the extension column 81, a colloid 85 covering the core 83 and the coil 84 together with the insulating outer cylinder 82, and two clamping covers 86, One of the card covers 86 is set between the colloid 85 and the insulating outer cylinder 82, the other card cover 86 is set between the colloid 85 and the cover 812, and the core 83 is soft iron The core, but not limited thereto, in other embodiments, the core 83 can be a nanoscale rare earth structure or a silicon steel sheet laminated structure.

Referring to Fig. 14A, the push rod device 10G-1 of the present invention is a first modification of the sixth embodiment, which is similar to the sixth embodiment, the difference is that the push rod device 10G-1 also includes a The steering gear 20 of the outer cylinder 6 is far away from the end of the outer cylinder 6, but it is not limited in this way. The steering gear 20 can be sleeved at any position on the outer surface of the outer cylinder 6 as required.

Referring to Fig. 14B, the push rod device 10G-2 of the present invention is a second modification of the sixth embodiment, which is similar to the sixth embodiment, the difference is that the push rod device 10G-2 also includes a The steering gear 20 of the inner rod 5 is a distance away from the end of the inner rod 5, but it is not limited in this way. The steering gear 20 can be sleeved on any position of the outer surface of the outer cylinder 6 as required.

Referring to Fig. 15, a seventh embodiment of the push rod device 10H of the present invention is similar to the sixth embodiment, the difference is that the push rod device 10H also includes a cylinder seat 7 and a fixedly sleeved push rod The steering gear 20 of the outer cylinder 6 of the device 10H, the cylinder seat 7 is for the outer cylinder 6 to pass through movably and has two abutments embedded in the inner wall of the cylinder seat 7 and abutting against the outer cylinder 6 Ring 71. It can be installed upright as shown in the figure, or it can be installed upside down (not shown in the figure). If it is installed upside down, the steering gear 20 is fixedly sleeved on the inner rod 5 of the push rod device 10H, and the resistance of the cylinder seat 7 The connecting ring 71 abuts against the inner rod 5 . And the push rod device 10H can also be applied to a steering system 100 "of a vehicle. The steering system 100" includes a wheel motor M, a first speed changer Structure P1, wheel axle unit A1 and a steering unit 9. The axle unit A1 is connected to the wheel motor M and a wheel W of the vehicle, and the wheel motor M drives the wheel W of the vehicle to rotate through the axle unit A1. The axle unit A1 includes a first axle section A11 connected to the wheel motor M, a second axle section A12 connected to the wheel W, and a universal joint A13 disposed between the first axle section and the second axle section. The steering unit 9 includes a suspension assembly 91 arranged on the vehicle body (not shown) of the vehicle and connected to the wheels W, at least one driving gear 92 connected to the suspension assembly 91 and at least one The steering motor 93 is used to drive the driving gear 92 to rotate. The suspension assembly 91 includes a steering knuckle 911 through which the axle unit A1 passes and connects the wheels, and two pairs of support arms 912 connecting the upper and lower ends of the steering knuckle 911 . The driving gear 92 meshes with the steering gear 20. When the driving gear 92 rotates, it will drive the steering gear 20 to rotate to drive the push rod device 10H, the support arm 912, the steering knuckle 911 and the wheels W rotates to achieve the purpose of wheel W turning. When the rotating shaft 1 rotates, the outer cylinder 6 moves back and forth along the extending direction of the rotating shaft 1 , driving the suspension assembly 91 to move up and down relative to the vehicle body. And by the setting of cylinder seat 7, this outer cylinder 6 can not shake in the process of moving up and down. In this embodiment, the first transmission mechanism P1 can be a planetary gear assembly, but it is not limited thereto.

Referring to Fig. 16, an eighth embodiment of the push rod device 10I of the present invention is similar to the sixth embodiment, the difference is that the push rod device 10I also has a plurality of blocks that protrude outwardly on the outer wall of the outer cylinder 6 61 , the locking blocks 61 can be engaged with a plurality of corresponding positioning blocks B, so that the outer cylinder 6 can be positioned relative to the inner rod 5 .

Referring to FIG. 17 , a ninth embodiment of the push rod device 10J of the present invention is similar to the seventh embodiment, the difference is that the push rod device 10J also includes a plurality of protrusions that are arranged on the outer wall of the outer cylinder 6 and protrude outward. Blocks 61', these blocks 61' can be engaged with a plurality of corresponding positioning blocks B, so that the outer cylinder 6 can move, rotate and be positioned relative to the inner rod 5. The blocks 61' are respectively arranged on both sides of the outer cylinder 6, and are located on the upper and lower sides of the steering gear 20 on each side.

Referring to Fig. 18, a tenth embodiment of the push rod device 10K of the present invention is similar to the sixth embodiment, the difference is that only the first magnetic unit is an electromagnet assembly 8, and the second magnetic unit is a permanent magnet m. By changing the magnetic polarity of the first magnetic unit, the outer cylinder 6 can also be driven to move along the inner rod 5 .

Referring to Fig. 18A, the push rod device 10K-1 of the present invention is a first modification of the tenth embodiment, which is similar to the tenth embodiment, the difference is that the push rod device 10K-1 also includes a The steering gear 20 of the outer cylinder 6 is far away from the end of the outer cylinder 6, but it is not limited in this way. The steering gear 20 can be sleeved at any position on the outer surface of the outer cylinder 6 as required.

Referring to Fig. 18B, the push rod device 10K-2 of the present invention is a second modification of the tenth embodiment, which is similar to the tenth embodiment, the difference is that the push rod device 10K-2 also includes a The steering gear 20 of the inner rod 5 is a distance away from the end of the inner rod 5 , but it is not limited in this way. The steering gear 20 can be sleeved at any position on the outer surface of the inner rod 5 as required.

Referring to FIG. 19 , an eleventh embodiment of the push rod device 10L of the present invention is similar to the tenth embodiment, the difference is that the push rod device 10L also has a plurality of cards that are arranged on the outer wall of the outer cylinder 6 and protrude outward. Blocks 61, these blocks 61 can be engaged by a plurality of corresponding positioning blocks B, so that the outer cylinder 6 can be positioned relative to the inner rod 5.

Referring to Fig. 20, a twelfth embodiment of the push rod device 10M of the present invention, which is the same as the tenth The embodiment is similar, but the difference is that the push rod device 10M also includes a plurality of blocks 61' protruding outward from the outer wall of the outer cylinder 6 and the cylinder seat 7. The locking blocks 61' can be engaged with a plurality of corresponding positioning blocks B, so that the outer cylinder 6 can move, rotate and be positioned relative to the inner rod 5. The blocks 61' are respectively arranged on both sides of the inner sleeve 34, and are located on the upper and lower sides of the steering gear 20 on each side.

Referring to Fig. 21, a thirteenth embodiment of the push rod device 10N of the present invention is similar to the sixth embodiment, the difference is that the outer cylinder 6 is fixed, and the inner rod 5 can move relative to the outer cylinder 6, and The inner rod 5 is recessed to form a plurality of positioning grooves 51 . The positioning grooves 51 can be engaged with a plurality of corresponding positioning blocks B, so that the inner rod 5 can be positioned relative to the outer cylinder 6 .

Referring to Fig. 22, a fourteenth embodiment of the push rod device 10P of the present invention is similar to the eleventh embodiment, the difference is that only the first magnetic unit is a permanent magnet m, and the second magnetic unit is an electromagnet Component 8. By changing the magnetic polarity of the second magnetic unit, the inner rod 5 can also be driven to move relative to the outer cylinder 6 .

Referring to Fig. 23A, a fifteenth embodiment of the push rod device 10Q of the present invention is similar to the sixth embodiment, the difference is that the outer cylinder 6 is driven by air pressure or oil pressure to move along the inner rod and The push rod device 10Q also includes a steering gear 20 fixedly sleeved on the outer cylinder 6 .

Referring to Fig. 23B, the push rod device 10Q-1 of the present invention is a first variation example of the fifteenth embodiment, which is similar to the fifteenth embodiment, the difference is that the steering gear 20 of the push rod device 10Q-1 is fixedly Sleeve on the inner rod 5 .

Referring to Fig. 24, the push rod device 10Q-2 of the present invention is a second modification of the fifteenth embodiment, which is similar to the fifteenth embodiment, the difference is that the push rod device 10Q-2 does not have a steering gear 20, Instead, it also has a plurality of clamping blocks 61 that are arranged on the outer wall of the outer cylinder 6 and protrude outward. These clamping blocks 61 can be engaged by a plurality of corresponding positioning blocks B, so that the outer cylinder 6 can move, rotate and relatively Position on the inner rod 5 .

Referring to Fig. 25, a sixteenth embodiment of the push rod device 10R of the present invention is similar to the sixth embodiment, the difference is that the outer cylinder 6 is driven by air pressure or oil pressure to move along the inner rod. And the push rod device 10R also includes a plurality of clamping blocks 61' protruding outwardly on the outer wall of the outer cylinder 6 and the cylinder base 7. The locking blocks 61' can be engaged with a plurality of corresponding positioning blocks B, so that the outer cylinder 6 can be positioned relative to the inner rod 5. The blocks 61' are respectively arranged on both sides of the inner sleeve 34, and are located on the upper and lower sides of the steering gear 20 on each side.

It should be noted that the above-mentioned first to sixteenth embodiments can all be applied to the steering system 100 shown in FIG. 3, the steering system 100' shown in FIG. 12, and the steering system 100" shown in FIG. , the deceleration switching mechanism 200 as shown in Figure 4, the range extender system 400 as shown in Figure 5, and the braking device 300 as shown in Figure 8 and Figure 9. It should be added that the sixth to fourteenth The embodiment is slightly different in the connection relationship of the elements when applied. In the sixth to the twelfth embodiment, the inner rod 5 is all fixed, and the outer cylinder 6 is connected to the push rod mechanism 4 of the steering system 100 and the push rod of the braking device 300. Rod 305. In the thirteenth and fourteenth embodiments, the outer cylinder 6 is fixed, and the inner rod 5 is connected to the push rod mechanism 4 of the steering system 100 and the push rod 305 of the braking device 300. The above two connection methods All can achieve the same effect. And in the push rod device of Fig. 11, Fig. 16, Fig. 19 and Fig. 24, the blocks 39, 61 can be changed into patterns such as positioning grooves 341, 51, which can also have the function of positioning The supplementary description is as follows, that is, 10A, 10B, 10D, 10G, 10H, 10K of the push rod device of the present invention can be applied to a deceleration switching mechanism 200, and 10A, 10B, 10D, 10G, 10H, 10K of the push rod device of the present invention Can be applied to a range extender system 400, the push rod device 10C, 10E, 10E-1, 10I, 10L, 10N, 10P, 10Q-2 can be applied to a vehicle braking device 300, 10A, 10B, 10D, 10G, 10K, 10C, 10E, 10E-1, 10I of the push rod device of the present invention , 10L, 10N, 10P, 10Q-2 can be applied to a steering system 100, 10A-1, 10D-1, 10F can be applied to a steering system 100', 10G-1, 10G-2, 10H, 10J, 10K-1, 10K-2, 10M, 10Q, 10Q-1, 10R can be applied to a steering system 100".

Referring to FIG. 15 , FIG. 26A and FIG. 26B , and not limited to this example, the push rod device of the present invention can also be applied to a steering system of a vehicle. This steering system is similar to the steering system 100", the difference is that the suspension assembly 91 of the steering unit 9 also has an extension frame 913 and the number of support arms 912 is two pairs. Each pair of support arms is roughly Y-shaped, and the extension frame 913 It includes a main shaft 913a extending up and down, two pairs of pivot shafts 913b extending from the main shaft towards the support arms respectively, and an extension steering gear 913c fixedly sleeved on the main shaft 913a and engaging with the driving gear 92. The main shaft 913a can be connected with the pusher The inner sleeve 34 of the rod device 10A, 10B, 10D, the outer cylinder 6 or the inner rod 5 of the push rod device 10G, the outer cylinder 6 or the inner rod 5 of the push rod device 10K can be welded, socketed, bolted, internally and externally threaded Engaged or integrally formed, and not limited thereto. When the drive gear 92 rotates, it will drive the extension steering gear 913c to rotate to drive the push rod device, the support arm 912, and the steering knuckle 911 And the wheel W rotates to achieve the purpose of the wheel W turning.

Referring again to FIG. 15 , FIG. 27A and FIG. 27B , and not limited to this example, the push rod device of the present invention can also be applied to a steering system of a vehicle. This steering system is similar to the steering system 100", the difference is that the suspension assembly 91 of the steering unit 9 also has an extension frame 913 and the number of support arms 912 is two pairs. Each pair of support arms is roughly Y-shaped, and the extension frame 913 It includes a main shaft 913a extending up and down and two pairs of pivot shafts 913b extending from the main shaft towards the support arms respectively. The inner sleeve 34 of the rod device, the outer cylinder 6 of the push rod device of Fig. 14A, Fig. 18A, and Fig. 23, and the inner rod 5 of the push rod device of Fig. 14B, Fig. 18B are welded, socketed, bolted, internal and external screwed Tooth joint or one-piece connection, but not limited thereto. When the driving gear 92 rotates, it will drive the steering gear 20 to rotate to drive the push rod device, the support arm 912 , the steering knuckle 911 and the wheel W to rotate, so as to achieve the purpose of steering the wheel W.

Referring to Figure 14C, Figure 18C and Figure 28, and not limited to this example, the third variation 10G-3 of the sixth embodiment of the push rod device of the present invention, the third variation 10K of the tenth embodiment -3 respectively can also be applied to a steering system 100A of a vehicle. The steering system 100A includes a wheel motor M, a first transmission mechanism P1 , a wheel axle unit A1 and a steering unit 9 . The axle unit A1 is connected to the wheel motor M and a wheel W of the vehicle, and the wheel motor M drives the wheel W of the vehicle to rotate through the axle unit A1. The axle unit A1 includes a first axle section A11 connected to the wheel motor M, a second axle section A12 connected to the wheel W, and a universal joint A13 disposed between the first axle section and the second axle section. The steering unit 9 includes a suspension assembly 91 arranged on the vehicle body (not shown) of the vehicle and connected to the wheels W, at least one driving gear 92 connected to the suspension assembly 91 and at least one The steering motor 93 is used to drive the driving gear 92 to rotate. The suspension assembly 91 includes a steering knuckle 911 through which the axle unit A1 passes and connects the wheels, two pairs of support arms 912 connecting the vehicle body and the upper and lower ends of the steering knuckle 911, and a support arm 912 connected to the bottom The shock absorber 914 of the outer cylinder 6 of the arm 912 and push rod device, one connects the shock absorber 914 and penetrates into the inner rod 5 and connects the connecting column 915 and a fixed ground cover of the car body (not shown). The shock absorber steering gear 916 is arranged on the shock absorber and meshes with the driving gear. When the driving gear 92 rotates, it will drive the shock-absorbing steering gear 916 to rotate to drive the push rod device, the support arm 912, The steering knuckle 911 and the wheel W rotate to achieve the purpose of the wheel W turning. Wherein, the shock absorber 914 may also be connected to the support arm 912 located above, which is not limited by this embodiment.

Referring to Figure 14D, Figure 18D and Figure 28, and not limited to this example, the fourth variation 10G-4 of the sixth embodiment of the push rod device of the present invention, and the fourth variation 10K of the tenth embodiment -4 are also respectively applicable to a steering system 100A of a vehicle. The difference is that the connecting column 915 of the fourth variation 10G-4 of the sixth embodiment and the fourth variation 10K-4 of the tenth embodiment is welded, socketed, bolted, internally and externally threaded, The body portion 811 of the extension column 81 located on the inner rod 5 is integrally formed, and does not extend through the inner rod 5 .

In summary, the push rod device of the present invention drives the rotating shaft 1 to rotate through the driving motor 2, and the telescopic assembly 3 can move along the extending direction of the rotating shaft 1 to achieve the function of pushing objects, which is very convenient to use, and The simple structure can effectively save the space required for installation and the difficulty of installation, so the purpose of the present invention can indeed be achieved.

But what is described above is only an embodiment of the present invention, and should not limit the scope of the present invention. All simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of the present invention.

10A: push rod device

1: Shaft

2: Drive motor

3: telescopic components

30: Bearing

31: bearing seat

32: Outer casing

33: Collar piece

34: inner sleeve

35: First seal

36: Second seal

37: snap ring

38: fixed nut

Claims (15)

A push rod device, comprising: a rotating shaft; a driving motor connected to the rotating shaft to drive the rotating shaft to rotate; The extension direction of the rotating shaft moves telescopically. The telescopic assembly includes a bearing seat through which the rotating shaft can rotate, an outer sleeve fixedly connected to the bearing seat, a collar movably sleeved on the rotating shaft and a The inner sleeve that is fixed to the collar part is located in the outer sleeve, and the outer wall of the inner sleeve is recessed to form a plurality of positioning grooves, and the positioning grooves can be engaged by a plurality of corresponding positioning blocks, so that the inner sleeve The sleeve is positionable relative to the shaft. The push rod device according to claim 1 further includes a steering gear fixedly sleeved on the inner sleeve. The push rod device according to claim 1, wherein the telescoping assembly also has a first sealing member fixedly connected to the collar member and sleeved between the rotating shaft and the outer sleeve, and a set of sealing members disposed away from the rotating shaft. A second seal between one end of the bearing seat and the inner sleeve. The push rod device according to claim 1 further includes a speed reduction mechanism, which is connected to the driving motor and the rotating shaft. The push rod device as claimed in claim 4, wherein the reduction mechanism is a planetary gear assembly. A push rod device, comprising: a rotating shaft; a driving motor connected to the rotating shaft to drive the rotating shaft to rotate; The extension direction of the shaft moves telescopically, and the telescopic assembly includes a A bearing seat for the rotating shaft to rotatably pass through, a collar movably sleeved on the rotating shaft and an inner sleeve fixedly connected to the collar. The push rod device as claimed in claim 6, wherein the telescoping assembly further has a second seal set between the end of the rotating shaft away from the bearing seat and the inner sleeve. The push rod device according to claim 6, wherein the telescopic assembly also has a plurality of clamping blocks protruding outward from the outer wall of the inner sleeve, and the clamping blocks can be engaged by a plurality of corresponding positioning blocks, This enables the inner sleeve to be positioned relative to the rotating shaft. The push rod device according to claim 6, wherein the outer wall of the inner sleeve is recessed to form a plurality of positioning grooves, and the positioning grooves can be engaged by a plurality of corresponding positioning blocks, so that the inner sleeve can Position relative to this axis. The push rod device as claimed in claim 8, wherein the blocks are respectively arranged on two sides of the inner sleeve, and the blocks on each side are arranged continuously with each other. The push rod device according to claim 8, further comprising a steering gear fixedly sleeved on the inner sleeve, the blocks are respectively arranged on both sides of the inner sleeve and are located on each side of the steering gear. The upper and lower sides of the gear. The push rod device as claimed in claim 6 further includes a steering gear fixedly sleeved on the inner sleeve. The push rod device as claimed in item 6 further includes a cylinder seat, and the cylinder seat allows the inner sleeve to be movably passed through. The push rod device according to claim 6 further includes a speed reduction mechanism, which is connected to the driving motor and the rotating shaft. The push rod device as claimed in claim 14, wherein the reduction mechanism is a planetary gear assembly.

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