Push rod device

Abstract

A push rod device comprises a rotating shaft, a driving motor and a telescopic assembly. The driving motor is connected to the rotating shaft to drive the rotating shaft to rotate. The telescopic assembly can be movably arranged on the rotating shaft, and when the rotating shaft rotates, the telescopic assembly can telescopically move along the extension direction of the rotating shaft. It is very convenient to use, and the simple structure can effectively save the space required for installation and the difficulty of installation.

Description

Technical Field

[0001] The invention relates to a push rod device, in particular to a push rod device which is easy to operate. Background Art

[0002] Existing push rod devices usually use air cylinders, hydraulic cylinders or mechanical push rods as a power source to push the object to which the thrust is to be applied to reciprocate back and forth. However, the storage volume of the liquid or gas in the air cylinder or hydraulic cylinder is relatively large, and it is also necessary to set up a pipeline for conveying gas / liquid, which takes up more space and is more difficult to install. Therefore, there is still room for improvement. Summary of the invention

[0003] The object of the present invention is to provide a push rod device which is easy to operate and has a simple structure.

[0004] The push rod device of the present invention comprises a rotating shaft; a driving motor connected to the rotating shaft for driving the rotating shaft to rotate; and a telescopic component movably arranged on the rotating shaft. When the rotating shaft rotates, the telescopic component can telescopically move along the extension direction of the rotating shaft.

[0005] The push rod device described in the present invention, the telescopic component includes a bearing seat for the rotating shaft to rotatably pass through, an outer sleeve fixedly connected to the bearing seat, a ring member movably sleeved on the rotating shaft, and an inner sleeve located in the outer sleeve and fixedly connected to the ring member.

[0006] The push rod device of the present invention, the telescopic assembly also has a first sealing member fixedly connected to the collar and sleeved between the rotating shaft and the outer sleeve, and a second sealing member sleeved between an end of the rotating shaft away from the bearing seat and the inner sleeve.

[0007] In the push rod device described in the present invention, the outer wall surface of the inner sleeve is recessed to form a plurality of positioning grooves, and the positioning grooves can be engaged with a plurality of corresponding positioning blocks, so that the inner sleeve can be positioned relative to the rotating shaft.

[0008] The push rod device of the present invention comprises a telescopic assembly comprising a bearing seat for the rotating shaft to rotatably pass through, a collar member movably sleeved on the rotating shaft, and an inner sleeve fixedly connected to the collar member.

[0009] In the push rod device of the present invention, the telescopic assembly further comprises a second sealing member sleeved between an end of the rotating shaft away from the bearing seat and the inner sleeve.

[0010] The push rod device of the present invention, the telescopic assembly also has a plurality of clamping blocks which are arranged on the outer wall of the inner sleeve and protrude outwards, and the clamping blocks can be engaged with a plurality of corresponding positioning blocks, so that the inner sleeve can be positioned relative to the rotating shaft.

[0011] In the push rod device described in the present invention, the outer wall surface of the inner sleeve is recessed to form a plurality of positioning grooves, and the positioning grooves can be engaged with a plurality of corresponding positioning blocks, so that the inner sleeve can be positioned relative to the rotating shaft.

[0012] In the push rod device of the present invention, the clamping blocks are respectively arranged on both sides of the inner sleeve, and the clamping blocks on each side are arranged in a continuous manner.

[0013] The push rod device of the present invention further comprises a steering gear fixedly sleeved on the inner sleeve, and the clamping blocks are respectively arranged on both sides of the inner sleeve and are located on the upper and lower sides of the steering gear on each side.

[0014] The push rod device of the present invention further comprises a steering gear fixedly sleeved on the inner sleeve.

[0015] The push rod device of the present invention further comprises a cylinder seat, on which the inner sleeve is movably inserted.

[0016] The push rod device of the present invention further comprises a speed reduction mechanism, which is connected to the driving motor and the rotating shaft.

[0017] In the push rod device described in the present invention, the speed reduction mechanism is a planetary gear assembly.

[0018] The push rod device of the present invention includes a telescopic component, including an inner rod and an outer cylinder movably mounted 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 to drive the outer cylinder to telescope along the inner rod.

[0019] In the push rod device of the present invention, the first magnetic unit and the second magnetic unit are both electromagnet components.

[0020] The push rod device described in the present invention, each electromagnet component has an extension column, an insulating unit arranged on the extension column, a core member arranged in the insulating unit and a coil arranged in the insulating unit and surrounding the core member, wherein one extension column is fixedly connected to the inner rod, and the other extension column is fixedly connected to the outer cylinder.

[0021] The push rod device described in the present invention, each extension column has a main body and a cover portion connected to the end of the main body and having a diameter larger than the main body, the insulator unit includes an insulating outer cylinder sleeved on the extension column, a colloid that together with the insulating outer cylinder covers the core piece and the coil, and two card covers, one of which is arranged between the colloid and the insulating outer cylinder, and the other card cover is arranged between the colloid and the cover portion.

[0022] In the push rod device of the present invention, the first magnetic unit is an electromagnet assembly, and the second magnetic unit is a permanent magnet.

[0023] In the push rod device described in the present invention, each electromagnet assembly has an extension column fixed to the inner rod, an insulator unit arranged on the extension column, a core member arranged in the insulator unit, and a coil arranged in the insulator unit and surrounding the core member.

[0024] The push rod device described in the present invention comprises an extension column having a main body and a cover portion connected to the end of the main body and having a diameter larger than that of the main body, and the insulator unit comprises an insulating outer cylinder sleeved on the extension column, a colloid that together with the insulating outer cylinder covers the core piece and the coil, and two card covers, wherein one card cover is arranged between the colloid and the insulating outer cylinder, and the other card cover is arranged between the colloid and the cover portion.

[0025] The push rod device of the present invention further comprises a steering gear fixedly sleeved on the outer cylinder.

[0026] The push rod device of the present invention further comprises a steering gear fixedly sleeved on the inner rod.

[0027] The push rod device of the present invention further comprises a cylinder seat, on which the outer cylinder is movably installed.

[0028] In the push rod device described in the present invention, the outer cylinder is recessed to form a plurality of positioning grooves, and the positioning grooves can be engaged with a plurality of corresponding positioning blocks, so that the outer cylinder can be positioned relative to the inner rod.

[0029] The push rod device of the present invention further comprises a plurality of clamping blocks which are arranged on the outer wall of the outer cylinder and protrude outwards, and the clamping blocks can be engaged with a plurality of corresponding positioning blocks so that the outer cylinder can be positioned relative to the inner rod.

[0030] In the push rod device of the present invention, the clamping blocks are respectively arranged on both sides of the outer cylinder, and the clamping blocks on each side are arranged in a continuous manner.

[0031] The push rod device of the present invention further comprises a steering gear fixedly sleeved on the outer cylinder, and the clamping blocks are respectively arranged on both sides of the outer cylinder and are located on the upper and lower sides of the steering gear on each side.

[0032] In the push rod device described in the present invention, the inner rod is recessed to form a plurality of positioning grooves, and the positioning grooves can be engaged with a plurality of corresponding positioning blocks, so that the inner rod can be positioned relative to the outer cylinder.

[0033] In the push rod device of the present invention, the core piece can be one of a soft iron core, a nano-grade rare earth structure and a silicon steel sheet stacking structure.

[0034] The beneficial effect of the present invention is that the drive motor drives the rotating shaft to rotate, and the telescopic component can move along the extension direction of the rotating shaft to achieve the effect of pushing the object. It is very convenient to use, and the simple structure can effectively save the space required for installation and the difficulty of installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a partial cross-sectional schematic diagram of a first embodiment of a push rod device of the present invention;

[0036] Figure 2 is a partial cross-sectional schematic diagram of the first embodiment, illustrating the first embodiment in an extended state;

[0037] Figure 2A is a partial cross-sectional schematic diagram of a variation of the first embodiment of the push rod device of the present invention;

[0038] Figure 3 is a partial cross-sectional schematic diagram illustrating the first embodiment applied to a steering system;

[0039] Figure 4 is a schematic diagram illustrating the first embodiment applied to a speed reduction switching mechanism;

[0040] Figure 4A is a schematic diagram illustrating the first embodiment applied to another speed reduction switching mechanism;

[0041] Figure 5 is a block diagram illustrating the first embodiment applied to a range-extending system;

[0042] Figure 6 is a partial cross-sectional schematic diagram illustrating another variation of the first variation;

[0043] Figure 7 is a partial cross-sectional schematic diagram of a second embodiment of a push rod device of the present invention;

[0044] Figure 8 and Fig. 9 is a schematic diagram illustrating the first embodiment applied to a brake device;

[0045] Fig.10 is a partial cross-sectional schematic diagram of a third embodiment of a push rod device of the present invention;

[0046] Fig. 10A is a partial cross-sectional schematic diagram of a variation of the third embodiment of the push rod device of the present invention;

[0047] Fig.11 is a partial cross-sectional schematic diagram of a fourth embodiment of a push rod device of the present invention;

[0048] Fig.11Ais a partial cross-sectional schematic diagram of a variation of the third embodiment of the push rod device of the present invention;

[0049] Fig.12 is a side view schematic diagram of a third embodiment of the push rod device of the present invention applied to a steering system;

[0050] Fig.13 is a partial cross-sectional schematic diagram of a fifth embodiment of the push rod device of the present invention;

[0051] Fig.14 is a partial cross-sectional schematic diagram of a sixth embodiment of the push rod device of the present invention, illustrating the electromagnet assembly;

[0052] Fig.14A is a partial cross-sectional schematic diagram of a first variation of the sixth embodiment, illustrating the electromagnet assembly;

[0053] Fig. 14B is a partial cross-sectional schematic diagram of a second variation of the sixth embodiment, illustrating the electromagnet assembly;

[0054] Fig. 14C is a side view schematic diagram of a third variation of the sixth embodiment of the push rod device of the present invention;

[0055] Fig.14D is a side view schematic diagram of a third variation of the sixth embodiment of the push rod device of the present invention;

[0056] Fig.15 is a side view schematically illustrating a seventh embodiment of the push rod device of the present invention applied to a steering system;

[0057] Fig.16 is a partial cross-sectional schematic diagram of an eighth embodiment of a push rod device of the present invention;

[0058] Fig.17 is a partial cross-sectional schematic diagram of a ninth embodiment of a push rod device of the present invention;

[0059] Fig.18 is a partial cross-sectional schematic diagram of a tenth embodiment of a push rod device of the present invention;

[0060] Fig.18A is a partial cross-sectional schematic diagram of a first variation of the tenth embodiment of the push rod device of the present invention;

[0061] Fig.18B is a partial cross-sectional schematic diagram of a second variation of the tenth embodiment of the push rod device of the present invention;

[0062] Fig. 18C is a partial cross-sectional schematic diagram of a third variation of the tenth embodiment of the push rod device of the present invention;

[0063] Fig.18D is a partial cross-sectional schematic diagram of a fourth variation of the tenth embodiment of the push rod device of the present invention;

[0064] Fig.19 is a partial cross-sectional schematic diagram of an eleventh embodiment of a push rod device of the present invention;

[0065] Fig. 20 is a partial cross-sectional schematic diagram of a twelfth embodiment of a push rod device of the present invention;

[0066] Fig.21 is a partial cross-sectional schematic diagram of a thirteenth embodiment of a push rod device of the present invention;

[0067] Fig. 22 is a partial cross-sectional schematic diagram of a fourteenth embodiment of a push rod device of the present invention;

[0068] Fig.23A is a partial cross-sectional schematic diagram of a fifteenth embodiment of a push rod device of the present invention;

[0069] Fig. 23B is a partial cross-sectional schematic diagram of a first variation of the fifteenth embodiment of the push rod device of the present invention;

[0070] 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;

[0071] Fig.25 is a partial cross-sectional schematic diagram of a sixteenth embodiment of a push rod device of the present invention;

[0072] Fig.26A is a side view schematic diagram of an extension frame of a steering unit of a steering system;

[0073] Fig.26B is a schematic top view of the extension frame;

[0074] Fig.27A is a side view schematic diagram of a modified form of the extension frame of the steering unit of the steering system;

[0075] Fig.27B is a schematic top view of the modified form of the extension frame; and

[0076] Fig.28 1 is a side view schematically illustrating the third variation of the sixth embodiment of the push rod device of the present invention applied to a steering system. DETAILED DESCRIPTION

[0077] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0078] Before the present invention is described in detail, it should be noted that similar components are denoted by the same reference numerals in the following description.

[0079] See also Figure 1 and Figure 2 The first embodiment of the push rod device 10A of the present invention includes a rotating shaft 1, a driving motor 2, a telescopic component 3 and a speed reduction mechanism P.

[0080] The driving motor 2 is connected to the rotating shaft 1 to drive 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 telescopic assembly 3 can reciprocate and telescope back and forth along the extension direction of the rotating shaft 1. The telescopic assembly 3 includes a bearing seat 31 for the rotating shaft 1 to rotatably pass through, a bearing 30 arranged on the bearing seat 31, an outer sleeve 32 fixedly connected to the bearing seat 31, a collar 33 movably sleeved on the rotating shaft 1, an inner sleeve 34 located in the outer sleeve 32 and fixedly connected to the collar 33, a first sealing member 35 fixedly connected to the collar 33 and sleeved between the rotating shaft 1 and the outer sleeve 32, and a second sealing member 36 sleeved between one end of the rotating shaft 1 away from the bearing seat 31 and the inner sleeve 34. In this embodiment, the speed reduction mechanism P can be a planetary gear assembly, but it is not limited thereto. The collar 33 is threadedly sleeved on the shaft 1 . When the shaft 1 rotates, the collar 33 and the inner sleeve 34 of the telescopic assembly 3 can reciprocate along the extending direction of the shaft 1 .

[0081] See also Figure 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, except that the push rod device 10A-1 further includes a steering gear 20 fixedly mounted on the inner sleeve 34.

[0082] See also Figure 3The 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 speed change mechanism P1, a wheel axle unit A1 and a push rod mechanism 4. The wheel axle unit A1 connects 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 wheel axle unit A1. The wheel axle unit A1 includes a first shaft section A11 connected to the wheel motor M, a second shaft section A12 connected to the wheel W, and a universal joint A13 arranged between the first shaft section and the second shaft 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 steering ball joint 44 arranged at one end of the push rod 43 and connected to the wheel W. The joint 41 can be, for example, a universal joint A13, so that the connecting rod 42 can rotate freely relative to the collar member 33 through the joint 41. One end of the connecting rod 42 is engaged with the engaging member 41, and the other end is provided with a thread to be screwed with the push rod 43. The push rod 43 can be axially moved 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 43 are fixed by a locking nut 45 to prevent the two from moving relative to each other in the axial direction. In this embodiment, the first speed change mechanism P1 can be a planetary gear assembly, but it is not limited thereto.

[0083] See also Figure 4The push rod device 10A of the present invention can be applied to a speed reduction switching mechanism 200 and can be movably disposed on the ring gear of the planetary gear assembly. The planetary gear assembly has a sun gear P11, planetary gears P12 surrounding the sun gear P11, a ring gear P13 located at the outermost circle, and a planet 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 disposed on the switching ring P141 facing the surface of the ring gear P13, two positioning pins P144 fixed to the vehicle body (not shown) and passing through the switching ring P141, and two driving members P143 that can drive the switching ring P141 to move along the positioning pins P144 toward or away from the ring gear P13. The engaging gear P142 can mesh with a connecting gear P145 meshed 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 large deceleration effect on the wheel 100. When the switching ring P141 drives the engaging gear P142 away from the ring gear and disengages from it, the ring gear P13 is not fixed. 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 component of the driving member P143, and can drive the switching ring P141 to move along the positioning pin P144 toward or away from the ring gear P13. Among them, the number of positioning pins P144 is not limited to two, and in other embodiments, it can also be other numbers, as long as there is at least one.

[0084] See also Figure 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, except that the deceleration switching mechanism 200 uses a driving member P143 to push the switching ring P141 to engage the ring gear P13. The deceleration switching mechanism 200' uses a driving member P143 to push the switching gear P146 to move along the left and right directions in the figure via a connecting rod 42 and a coupling member 41. When the switching gear P146 simultaneously engages the connecting gear P145 of the ring gear P13 and the engaging gear P142 of the switching ring P141, the ring gear P13 is fixed, and a large deceleration or large acceleration function can be generated. 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 direct transmission can be achieved.

[0085] See also Figure 5The 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 component 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 component 401 includes a first fuel input part 401a and a second fuel input part 401b. The first fuel input part 401a is used to receive a first fuel source, and the second fuel input part 401b is used 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 component 401 to generate electrical output. The range-extending system 400 can be installed in a vehicle, such as a vehicle, ship, airplane, or other vehicle that can carry a range-extending component. The vehicle at least uses the range-extending component 401 as a power source (for example, the vehicle can be a hybrid electric vehicle). The fuel is transported to the range-extending component 401 to be further converted into electrical energy to be provided to the main power source of the vehicle or to charge the main power source to increase the mileage for the range-extending system. The first fuel source can be, for example, oxygen or air, and the second fuel source can be, for example, hydrogen, but is not limited thereto.

[0086] 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 gas cylinders 402a, 402b, 402c, and 402e. The gas cylinders 402a, 402b, 402c, and 402e are directly connected to the first fuel source control device 403. The first fuel source control device 403 is connected between the gas cylinders 402a to 402e 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 links 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. Thus, when the vehicle needs to accelerate faster, the driver can operate the push rod device 10A and continue to push the first actuating unit 4031 and the second actuating unit 4032, so as to simultaneously receive the first fuel source from the first fuel storage device 402 and react chemically with the second fuel source in the range extender assembly 401 to increase the power supplement for acceleration.

[0087] The first humidifier 404 is connected between the first fuel storage device 402 and the first fuel input part 401a, so that the fuel provided to the range extender component 401 can contain some water vapor, replenishing the moisture contained in the polymer electrolyte membrane (such as ion exchange membrane) in the range extender component 401, avoiding voltage drop and reducing the probability of battery damage.

[0088] The first fuel source auxiliary control device 405 is connected 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 generate a chemical reaction with the second fuel source in the range extender component 401 to supplement the power.

[0089] The first pressure balance valve 406 is arranged below the chassis of the vehicle, is actuated with the weight of the vehicle, and is connected between the first fuel storage device 402 and the first humidifier 404. Thus, as the 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 is delivered to the first fuel input part 401a, thereby increasing the power output of the range extender component 401. The air compressor 407 is connected to the atmosphere to compress the air into the first fuel source. The pressure regulating valve is arranged between the air compressor 407 and the first fuel storage device 402 to adjust the pressure of the first fuel source, thereby avoiding excessive pressure in the pipelines connected between the components, which may cause rupture and cause the danger of gas source leakage. The air dryer 409 is connected between the air compressor 407 and the first fuel source control device 403 to remove moisture from the air compressed by the air compressor 407. The discharge valve 411 is connected to the atmosphere and each gas cylinder 402a, 402b, 402c, 402e respectively, thereby discharging the condensed water in the gas cylinders 402a, 402b, 402c, 402e into the atmosphere while maintaining the pressure in the gas cylinders 402a, 402b, 402c, 402e.

[0090] The multi-circuit protection valve 410 is connected between the air compressor 407 and the air storage cylinders 402a, 402b, 402c, and 402e, and can control whether the air storage cylinders 402a and 402b are connected to the first fuel source control device 403 according to a pressure threshold value. Specifically, when the actual pressure value is lower than the pressure threshold value, the multi-circuit protection valve 410 is in a closed state, and when the actual pressure value is greater than or equal to the pressure threshold value, the multi-circuit protection valve 410 is in an open state.

[0091] It should be noted that Figure 5 The pipeline structure shown is to illustrate the connection relationship between the first fuel source and other components, and the second fuel source is similar to the first fuel source, and can also cooperate with the range extender component 401, a 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, so that the second fuel source can be delivered to the range extender component 401 to produce 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 source from the second fuel storage device.

[0092] See also Figure 6 The first embodiment has a modified form, in which 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 connected and linked by a first gear 11 fixedly mounted on the rotating shaft 1, a second gear 12 meshed with the first gear 11 and driven by the driving motor 2, and an extension shaft 13 for the second gear 12 to be fixedly mounted. When the driving motor 2 drives the extension shaft 13 and the second gear 12 to rotate, the first gear 11 and the rotating shaft 1 can be driven to rotate, and the collar 33 can also be driven to move along the rotating shaft 1 with the inner sleeve 34.

[0093] See also Figure 7 The second embodiment of the push rod device 10C of the present invention is similar to the first embodiment, except that the inner sleeve 34 of the second embodiment is recessed to form a plurality of positioning grooves 341, and the positioning grooves 341 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.

[0094] See also Figure 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 shoe pieces 302, a rotatable cam 303, an elastic member 304 whose two ends are respectively connected to the shoe pieces 302, a push rod 305 connected to the push rod device 10C, and a linkage rod 306 that links 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 rotating shaft 1, it will synchronously drive the push rod 305, and the push rod 305 drives the cam 303 to rotate through the linkage rod 306, so that the shoe piece 302 contacts the brake drum 301 to limit the rotation of the brake drum 301, so as to achieve the effect of braking and deceleration.

[0095] See also Fig.10The third embodiment of the push rod device 10D of the present invention is similar to the first embodiment, except that the outer sleeve 32 and the retaining ring 37 are omitted in the third embodiment, and the bearing seat 31 and the bearing 30 are arranged in opposite directions, so a nut 38' is additionally arranged to fix the bearing 30. When the rotating shaft 1 is driven by the driving motor 2 to rotate, the collar 33 and the inner sleeve 34 can be driven to move along the rotating shaft 1.

[0096] See also Fig. 10A The push rod device 10D-1 of the present invention is a first variation of the third embodiment, which is similar to the third embodiment, except that the push rod device 10D-1 further includes a steering gear 20 fixedly mounted on the inner sleeve 34.

[0097] See also Fig.11 The fourth embodiment of the push rod device 10E of the present invention is similar to the third embodiment, except that the telescopic assembly 3 of the fourth embodiment further has a plurality of blocks 39 disposed on the outer wall of the inner sleeve 34 and protruding outward, and the 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 blocks 39 are respectively disposed on both sides of the inner sleeve 34, and the blocks 39 on each side are arranged in a continuous manner.

[0098] See also 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, except that the inner sleeve 34 of the telescopic component 3 is recessed to form a plurality of positioning grooves 341, and the positioning grooves 341 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.

[0099] See also Fig.12The 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 wheel axle unit A1 connects 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 wheel axle unit A1. The wheel axle unit A1 includes a first shaft section A11 connected to the wheel motor M, a second shaft section A12 connected to the wheel W, and a universal joint A13 arranged between the first shaft section and the second shaft section. The steering unit 9 includes a suspension assembly 91 arranged on the body of the vehicle (not shown) and connected to the wheel W, at least one driving gear 92 connected to the suspension assembly 91, and at least one steering motor 93 arranged on the body to drive the driving gear 92 to rotate. The suspension assembly 91 includes a steering knuckle 911 for the wheel axle unit A1 to pass through and connect to the wheel, 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, thereby driving the push rod device 10D-1, the support arm 912, the steering knuckle 911 and the wheel W to rotate, thereby achieving the purpose of steering the wheel W. When the rotating shaft 1 rotates, the collar 33 of the telescopic assembly 3 moves back and forth along the extension direction of the rotating shaft 1 together with the inner sleeve 34, driving the suspension assembly 91 to move up and down relative to the vehicle body. In this embodiment, the first speed change mechanism P1 can be a planetary gear assembly, but it is not limited thereto.

[0100] See also Fig.10 and Fig.13 The fifth embodiment of the push rod device 10F of the present invention is similar to the third embodiment, except that the telescopic assembly 3 of the fifth embodiment also has a plurality of blocks 39' disposed on the outer wall of the inner sleeve 34 and protruding outwards. The blocks 39' are disposed 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 engaged with a plurality of corresponding positioning blocks B, so that the inner sleeve 34 can move, rotate and be positioned relative to the rotating shaft 1. By engaging the positioning blocks B with the blocks 39', the axial stress borne by the rotating shaft 1, the lifting collar 33 and the inner sleeve 34 can be shared, and the service life can be increased. Among them, the number of positioning blocks B is not limited to three pairs in this embodiment, and can also be other numbers in other embodiments, as long as at least one pair is sufficient.

[0101] See also Fig.14 The sixth embodiment of the push rod device 10G of the present invention comprises a telescopic assembly, a first magnetic unit and a second magnetic unit. The telescopic assembly comprises an inner rod 5 and an outer cylinder 6.

[0102] 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 to drive the outer cylinder 6 to move along the inner rod 5. In this embodiment, the first magnetic unit and the second magnetic unit are both electromagnet components 8. Each electromagnet component 8 has an extension column 81, an insulator unit sleeved on the extension column 81, a core 83 arranged in the insulator unit, and a coil 84 arranged in the insulator unit around the core 83, wherein one extension column 81 is fixedly connected to the inner rod 5, and the other is fixedly connected to the outer cylinder 6. Each extension column 81 has a main body 811 and a cover 812 connected to the end of the main body 811 and having a diameter larger than the main body 811. In this embodiment, the insulator unit includes an insulating outer cylinder 82 arranged on the extension column 81, a colloid 85 that together with the insulating outer cylinder 82 covers the core piece 83 and the coil 84, and two card covers 86, wherein one card cover 86 is arranged between the colloid 85 and the insulating outer cylinder 82, and the other card cover 86 is arranged between the colloid 85 and the cover portion 812, and the core piece 83 is a soft iron core, but this is not limited to this. In other embodiments, the core piece 83 may be a nano-level rare earth structure or a silicon steel sheet stacking structure.

[0103] See also Fig.14A The push rod device 10G-1 of the present invention is a first variation of the sixth embodiment, which is similar to the sixth embodiment, except that the push rod device 10G-1 also includes a steering gear 20 fixedly mounted on the outer cylinder 6. The steering gear 20 is a distance away from the end of the outer cylinder 6, but is not limited to this state. The steering gear 20 can be mounted at any position on the outer surface of the outer cylinder 6 as needed.

[0104] See also Fig. 14B The push rod device 10G-2 of the present invention is a second variation of the sixth embodiment, which is similar to the sixth embodiment, except that the push rod device 10G-2 also includes a steering gear 20 fixedly mounted on the inner rod 5. The steering gear 20 is a distance away from the end of the inner rod 5, but is not limited to this state. The steering gear 20 can be mounted at any position on the outer surface of the outer cylinder 6 as needed.

[0105] See also Fig.15The seventh embodiment of the push rod device 10H of the present invention is similar to the sixth embodiment, except that the push rod device 10H further comprises a cylinder seat 7 and a steering gear 20 fixedly mounted on the outer cylinder 6 of the push rod device 10H. The cylinder seat 7 is provided for the outer cylinder 6 to be movably mounted and has two abutment rings 71 embedded in the inner wall of the cylinder seat 7 and abutting against the outer cylinder 6. 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 mounted on the inner rod 5 of the push rod device 10H, and the abutment ring 71 of the cylinder seat 7 abuts against the inner rod 5. The push rod device 10H can also be applied to a steering system 100" of a vehicle. The steering system 100" comprises a wheel motor M, a first speed change mechanism P1, a wheel axle unit A1 and a steering unit 9. The axle unit A1 connects 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 shaft section A11 connected to the wheel motor M, a second shaft section A12 connected to the wheel W, and a universal joint A13 arranged between the first shaft section and the second shaft section. The steering unit 9 includes a suspension assembly 91 arranged on the body of the vehicle (not shown) and connected to the wheel W, at least one driving gear 92 connected to the suspension assembly 91, and at least one steering motor 93 arranged on the body to drive the driving gear 92 to rotate. The suspension assembly 91 includes a steering knuckle 911 for the axle unit A1 to pass through and connect to the wheel, 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 drives the steering gear 20 to rotate, thereby driving the push rod device 10H, the support arm 912, the steering knuckle 911 and the wheel W to rotate, thereby achieving the purpose of steering the wheel W. When the rotating shaft 1 rotates, the outer cylinder 6 moves back and forth along the extension direction of the rotating shaft 1, driving the suspension assembly 91 to move up and down relative to the vehicle body. And by the arrangement of the cylinder seat 7, the outer cylinder 6 will not shake during the up and down movement. In this embodiment, the first speed change mechanism P1 can be a planetary gear assembly, but it is not limited to this.

[0106] See also Fig.16 The eighth embodiment of the push rod device 10I of the present invention is similar to the sixth embodiment, except that the push rod device 10I further comprises a plurality of blocks 61 protruding outwardly from the outer wall of the outer cylinder 6, and the 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.

[0107] See also Fig.17The ninth embodiment of the push rod device 10J of the present invention is similar to the seventh embodiment, except that the push rod device 10J further comprises a plurality of blocks 61' disposed on the outer wall of the outer cylinder 6 and protruding outwards, and the 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 disposed 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.

[0108] See also Fig.18 The tenth embodiment of the push rod device 10K of the present invention is similar to the sixth embodiment, except 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.

[0109] See also Fig.18A The push rod device 10K-1 of the present invention is a first variation of the tenth embodiment, which is similar to the tenth embodiment, except that the push rod device 10K-1 also includes a steering gear 20 fixedly mounted on the outer cylinder 6. The steering gear 20 is a certain distance away from the end of the outer cylinder 6, but is not limited to this state. The steering gear 20 can be mounted at any position on the outer surface of the outer cylinder 6 as needed.

[0110] See also Fig.18B The push rod device 10K-2 of the present invention is a second variation of the tenth embodiment, which is similar to the tenth embodiment, except that the push rod device 10K-2 also includes a steering gear 20 fixedly mounted on the inner rod 5. The steering gear 20 is a distance away from the end of the inner rod 5, but is not limited to this state. The steering gear 20 can be mounted at any position on the outer surface of the inner rod 5 as needed.

[0111] See also Fig.19 The eleventh embodiment of the push rod device 10L of the present invention is similar to the tenth embodiment, except that the push rod device 10L further comprises a plurality of blocks 61 protruding outwardly from the outer wall of the outer cylinder 6, and the 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.

[0112] See also Fig. 20 The twelfth embodiment of the push rod device 10M of the present invention is similar to the tenth embodiment, except that the push rod device 10M further comprises a plurality of blocks 61' and a cylinder seat 7 provided on the outer wall of the outer cylinder 6 and protruding outward. The 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 provided 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.

[0113] See also Fig.21 The thirteenth embodiment of the push rod device 10N of the present invention is similar to the sixth embodiment, except that the outer cylinder 6 is fixed, while 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.

[0114] See also Fig. 22 The fourteenth embodiment of the push rod device 10P of the present invention is similar to the eleventh embodiment, except that only the first magnetic unit is a permanent magnet m, and the second magnetic unit is an electromagnet assembly 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.

[0115] See also Fig.23A The fifteenth embodiment of the push rod device 10Q of the present invention is similar to the sixth embodiment, except 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 mounted on the outer cylinder 6.

[0116] See also Fig. 23B The push rod device 10Q-1 of the present invention is a first variation of the fifteenth embodiment, which is similar to the fifteenth embodiment, except that the steering gear 20 of the push rod device 10Q-1 is fixedly mounted on the inner rod 5.

[0117] See also Fig.24 The push rod device 10Q-2 of the present invention is a second variation of the fifteenth embodiment, which is similar to the fifteenth embodiment, except that the push rod device 10Q-2 does not have a steering gear 20, but also has a plurality of blocks 61 protruding outwardly from the outer wall of the outer cylinder 6, and the 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.

[0118] See also Fig.25 The sixteenth embodiment of the push rod device 10R of the present invention is similar to the sixth embodiment, except that the outer cylinder 6 is driven by air pressure or oil pressure to move along the inner rod. The push rod device 10R also includes a plurality of blocks 61' and a cylinder seat 7 that are disposed on the outer wall of the outer cylinder 6 and protrude outward. The 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 disposed 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.

[0119] It should be noted that the first to sixteenth embodiments described above can all be applied to Figure 3 The steering system 100 shown in FIG. Fig.12The steering system 100 ′ shown in FIG. Fig.15 The steering system 100 shown in FIG. Figure 4 The deceleration switching mechanism 200 shown in FIG. Figure 5 The range extending system 400 shown and the application thereof Figure 8 and Fig. 9 The brake device 300 shown. It should be supplemented that the connection relationship of the components in the sixth to fourteenth embodiments is slightly different when applied. In the sixth to twelfth embodiments, the inner rod 5 is fixed, and the outer cylinder 6 is connected to the push rod mechanism 4 of the steering system 100 and the push rod 305 of the brake device 300. 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 brake device 300. The above two connection methods can achieve the same effect. And Fig.11 , Fig.16 , Fig.19 and Fig.24 In the push rod device, the blocks 39 and 61 can be changed to the positioning grooves 341 and 51, and can also have the positioning function. The supplementary explanation is as follows, that is, the push rod device 10A, 10B, 10D, 10G, 10H, 10K of the present invention can be applied to a deceleration switching mechanism 200, the push rod device 10A, 10B, 10D, 10G, 10H, 10K of the present invention can be applied to an extended range system 400, the push rod device 10C, 10E, 10E-1, 10I, 10L, 10N, 10P, 10Q-2 of the present invention can be applied to a vehicle brake device 300, and the push rod device 10A, 10B, 10D, 10G, 10H, 10K of the present invention can be applied to a vehicle brake device 300. 10A, 10B, 10D, 10G, 10K, 10C, 10E, 10E-1, 10I, 10L, 10N, 10P, and 10Q-2 can be applied to a steering system 100, 10A-1, 10D-1, and 10F can be applied to a steering system 100', and 10G-1, 10G-2, 10H, 10J, 10K-1, 10K-2, 10M, 10Q, 10Q-1, and 10R can be applied to a steering system 100".

[0120] See also 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. The steering system is similar to the steering system 100", except 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 includes a main shaft 913a extending up and down, two pairs of pivot shafts 913b extending from the main shaft toward the support arms respectively, and an extended steering gear 913c fixedly mounted on the main shaft 913a and meshing with the drive gear 92. The main shaft 913a can be connected to the push rod The inner sleeve 34 of the devices 10A, 10B, 10D, the outer cylinder 6 or the inner rod 5 of the push rod device 10G, and the outer cylinder 6 or the inner rod 5 of the push rod device 10K are connected by welding, mortise and tenon joints, bolt joints, internal and external screw thread joints, or integrally formed, but are not limited thereto. When the driving gear 92 rotates, it will drive the extended steering gear 913c to rotate to drive the push rod device, the support arm 912, the steering knuckle 911, and the wheel W to rotate, thereby achieving the purpose of steering the wheel W.

[0121] See also 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. The steering system is similar to the steering system 100", except that the suspension assembly 91 of the steering unit 9 further 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 includes a main shaft 913a extending up and down and two pairs of pivot shafts 913b extending from the main shaft toward the support arms. The main shaft 913a can be connected to the support arm 912. Figure 2A and Fig. 10A The inner sleeve 34 of the push rod device, Fig.14A , Fig.18A , the outer cylinder 6 of the push rod device of FIG. 23, Fig. 14B , Fig.18B The inner rod 5 of the push rod device is connected by welding, mortise and tenon joint, bolt joint, internal and external screw thread joint or integral forming, 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.

[0122] See also Fig. 14C , Fig. 18C and Fig.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 and the third variation 10K-3 of the tenth embodiment can also be applied to a steering system 100A of a vehicle. The steering system 100A includes a wheel motor M, a first speed change mechanism P1, a wheel axle unit A1 and a steering unit 9. The wheel axle unit A1 connects 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 wheel axle unit A1. The wheel axle unit A1 includes a first shaft section A11 connected to the wheel motor M, a second shaft section A12 connected to the wheel W, and a universal joint A13 arranged between the first shaft section and the second shaft section. The steering unit 9 includes a suspension assembly 91 arranged on the body of the vehicle (not shown) and connected to the wheel W, at least one driving gear 92 connected to the suspension assembly 91, and at least one steering motor 93 arranged on the body to drive the driving gear 92 to rotate. The suspension assembly 91 includes a steering knuckle 911 through which the wheel axle unit A1 passes and is connected to the wheel, two pairs of support arms 912 connecting the vehicle body and the upper and lower ends of the steering knuckle 911, a shock absorber 914 connecting the support arm 912 located below and the outer cylinder 6 of the push rod device, a connecting column 915 connected to the shock absorber 914 and extending through the inner rod 5 and connected to the vehicle body (not shown), and a shock-absorbing steering gear 916 fixedly sleeved on the shock absorber and meshing 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 to rotate, so as to achieve the purpose of steering the wheel W. Among them, the shock absorber 914 can also be connected to the support arm 912 located above, and is not limited to this embodiment.

[0123] See also Fig.14D , Fig.18D and Fig.28 , and not limited to this example, the fourth variation 10G-4 of the sixth embodiment and the fourth variation 10K-4 of the tenth embodiment of the push rod device of the present invention can also be applied 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 connected to the main body 811 of the extension column 81 located on the inner rod 5 by welding, mortise and tenon joint, bolt joint, internal and external thread joint, and integral molding, and does not penetrate into the inner rod 5.

[0124] In summary, the push rod device of the present invention drives the rotating shaft 1 to rotate by the driving motor 2, and the telescopic component 3 can move along the extension direction of the rotating shaft 1 to achieve the function of pushing the object. It is very convenient to use, and the simple structure can effectively save the space required for installation and the difficulty of installation, so it can indeed achieve the purpose of the present invention.

[0125] However, the above is only an embodiment of the present invention and should not be used to limit the scope of the present invention. All simple equivalent changes and modifications made according to the claims and the patent specification of the present invention are still within the scope of the present invention.

Claims

1. A push rod device, applied to a steering system of a vehicle, the steering system comprising a steering unit, the steering unit comprising at least one driving gear and at least one steering motor disposed on a vehicle body for driving the driving gear to rotate, characterized in that: The push rod device comprises: Rotating shaft; A driving motor connected to the rotating shaft to drive the rotating shaft to rotate; a telescopic assembly, movably disposed on the rotating shaft, and comprising an outer sleeve, an inner sleeve movably disposed in the outer sleeve, and an extension frame, wherein the extension frame comprises a main shaft extending up and down and connected to the inner sleeve, and two pairs of pivot shafts extending outwards from the main shaft respectively, and when the rotating shaft rotates, the inner sleeve can telescopically move along the extension direction of the rotating shaft; and The steering gear is fixedly sleeved on the inner sleeve or the main shaft and meshes with the driving gear.

2. The push rod device according to claim 1, characterized in that: The telescopic assembly also includes a bearing seat for the rotating shaft to rotatably pass through, and a collar member movably sleeved on the rotating shaft, the outer sleeve is fixedly connected to the bearing seat, and the inner sleeve is fixedly connected to the collar member.

3. The push rod device according to claim 2, characterized in that: The telescopic assembly also comprises a first sealing member fixedly connected to the collar and sleeved between the rotating shaft and the outer sleeve, and a second sealing member sleeved between an end of the rotating shaft away from the bearing seat and the inner sleeve.

4. The push rod device according to claim 2, characterized in that: The outer wall surface of the inner sleeve is concave to form a plurality of positioning grooves, and the positioning grooves can be engaged with a plurality of corresponding positioning blocks, so that the inner sleeve can be positioned relative to the rotating shaft.

5. The push rod device according to claim 1, characterized in that: The steering unit further comprises a suspension assembly arranged on the vehicle body, wherein the suspension assembly comprises a steering knuckle and two pairs of support arms connecting upper and lower ends of the steering knuckle, and the pivot shafts extend from the main shaft toward the support arms respectively.

6. The push rod device according to claim 1, characterized in that: It also comprises a cylinder seat, on which the main shaft can be movably passed.

7. The push rod device according to claim 1, characterized in that: It also includes a speed reduction mechanism, which connects the driving motor and the rotating shaft.

8. The push rod device according to claim 7, characterized in that: The speed reduction mechanism is a planetary gear assembly.

9. A push rod device, applied to a steering system of a vehicle, the steering system comprising a steering unit, the steering unit comprising at least one driving gear and at least one steering motor disposed on a vehicle body for driving the driving gear to rotate, characterized in that: The push rod device comprises: Rotating shaft; A driving motor connected to the rotating shaft to drive the rotating shaft to rotate; A telescopic assembly is movably disposed on the rotating shaft and includes an inner sleeve and an extension frame movably sleeved on the rotating shaft. The extension frame includes a main shaft extending up and down and connected to the inner sleeve and two pairs of pivot shafts extending outward from the main shaft respectively. When the rotating shaft rotates, the inner sleeve can telescopically move along the extension direction of the rotating shaft; and The steering gear is fixedly sleeved on the inner sleeve or the main shaft and meshes with the driving gear.

10. The push rod device according to claim 9, characterized in that: The steering unit further comprises a suspension assembly arranged on the vehicle body, wherein the suspension assembly comprises a steering knuckle and two pairs of support arms connecting upper and lower ends of the steering knuckle, and the pivot shafts extend from the main shaft toward the support arms respectively.

11. The push rod device according to claim 9, characterized in that: The telescopic assembly also includes a bearing seat for the rotating shaft to rotatably pass through and a collar member movably sleeved on the rotating shaft, and the inner sleeve is fixedly connected to the collar member.

12. The push rod device according to claim 11, characterized in that: The telescopic assembly also has a second sealing member which is sleeved between an end of the rotating shaft away from the bearing seat and the inner sleeve.

13. The push rod device according to claim 9, characterized in that: The telescopic assembly also has a plurality of clamping blocks which are arranged on the outer wall of the inner sleeve and protrude outwards. The clamping blocks can be engaged with a plurality of corresponding positioning blocks so that the inner sleeve can be positioned relative to the rotating shaft.

14. The push rod device according to claim 9, characterized in that: The outer wall surface of the inner sleeve is concave to form a plurality of positioning grooves, and the positioning grooves can be engaged with a plurality of corresponding positioning blocks, so that the inner sleeve can be positioned relative to the rotating shaft.

15. The push rod device according to claim 13, characterized in that: The clamping blocks are respectively arranged on both sides of the inner sleeve, and the clamping blocks on each side are arranged in a continuous manner.

16. The push rod device according to claim 13, characterized in that: The steering gear is fixedly sleeved on the inner sleeve, and the clamping blocks are respectively arranged on both sides of the inner sleeve and are located on the upper and lower sides of the steering gear on each side.

17. The push rod device according to claim 9, characterized in that: It also comprises a cylinder seat, on which the main shaft can be movably passed.

18. The push rod device according to claim 9, characterized in that: It also includes a speed reduction mechanism, which connects the driving motor and the rotating shaft.

19. The push rod device according to claim 18, characterized in that: The speed reduction mechanism is a planetary gear assembly.

20. A push rod device, applied to a steering system of a vehicle, the steering system comprising a steering unit, the steering unit comprising at least one driving gear and at least one steering motor disposed on a vehicle body to drive the driving gear to rotate, characterized in that: The push rod device comprises: The telescopic assembly comprises an inner rod, an outer cylinder movably sleeved on the inner rod and an extension frame, wherein the extension frame comprises a main shaft extending up and down and connected to the inner rod or the outer cylinder and two pairs of pivot shafts extending laterally from the main shaft to both sides respectively; A first magnetic unit is disposed at the end of the inner rod; A second magnetic unit is disposed in the outer cylinder and corresponds to the position of the first magnetic unit; and A steering gear, fixedly sleeved on the telescopic assembly or the main shaft and meshing with the driving gear; The first magnetic unit and the second magnetic unit attract or repel each other through magnetic force, so as to drive the outer cylinder to extend and retract along the inner rod.

21. The push rod device according to claim 20, characterized in that: The steering unit further comprises a suspension assembly arranged on the vehicle body, wherein the suspension assembly comprises a steering knuckle and two pairs of support arms connecting upper and lower ends of the steering knuckle, and the pivot shafts extend from the main shaft toward the support arms respectively.

22. The push rod device according to claim 20, characterized in that: The first magnetic unit and the second magnetic unit are both electromagnet components.

23. The push rod device according to claim 22, characterized in that: Each electromagnet assembly comprises an extension column, an insulator unit arranged on the extension column, a core member arranged in the insulator unit and a coil arranged in the insulator unit and surrounding the core member, wherein one extension column is fixedly connected to the inner rod, and another extension column is fixedly connected to the outer cylinder.

24. The push rod device according to claim 23, characterized in that: Each extension column has a main body and a cover connected to the end of the main body and having a diameter larger than that of the main body. The insulator unit includes an insulating outer cylinder sleeved on the extension column, a colloid that together with the insulating outer cylinder covers the core and the coil, and two card covers, one of which is arranged between the colloid and the insulating outer cylinder, and the other card cover is arranged between the colloid and the cover.

25. The push rod device according to claim 20, characterized in that: The first magnetic unit is an electromagnet assembly, and the second magnetic unit is a permanent magnet.

26. The push rod device according to claim 25, characterized in that: Each electromagnet assembly comprises an extension column fixedly connected to the inner rod, an insulator unit arranged on the extension column, a core member arranged in the insulator unit, and a coil arranged in the insulator unit and surrounding the core member.

27. The push rod device according to claim 26, characterized in that: The extension column has a main body and a cover connected to the end of the main body and having a diameter larger than that of the main body. The insulator unit includes an insulating outer cylinder sleeved on the extension column, a colloid that together with the insulating outer cylinder covers the core piece and the coil, and two card covers, one of which is arranged between the colloid and the insulating outer cylinder, and the other card cover is arranged between the colloid and the cover.

28. The push rod device according to claim 22 or 25, characterized in that: The steering gear is fixedly sleeved on the outer cylinder.

29. The push rod device according to claim 22 or 25, characterized in that: The steering gear is fixedly sleeved on the inner rod.

30. The push rod device according to claim 20, characterized in that: It also comprises a cylinder seat, on which the main shaft can be movably passed.

31. The push rod device according to claim 22 or 25, characterized in that: The outer cylinder is recessed to form a plurality of positioning grooves, and the positioning grooves can be engaged with a plurality of corresponding positioning blocks, so that the outer cylinder can be positioned relative to the inner rod.

32. The push rod device according to claim 22 or 25, characterized in that: It also comprises a plurality of clamping blocks which are arranged on the outer wall of the outer cylinder and protrude outwards, and the clamping blocks can be engaged with a plurality of corresponding positioning blocks so that the outer cylinder can be positioned relative to the inner rod.

33. The push rod device according to claim 32, characterized in that: The blocks are respectively arranged on both sides of the outer cylinder, and the blocks on each side are arranged in a continuous manner.

34. The push rod device according to claim 32, characterized in that: The steering gear is fixedly sleeved on the outer cylinder, and the clamping blocks are respectively arranged on both sides of the outer cylinder and are located at the upper and lower sides of the steering gear on each side.

35. The push rod device according to claim 22 or 25, characterized in that: The inner rod is recessed to form a plurality of positioning grooves, and the positioning grooves can be engaged with a plurality of corresponding positioning blocks, so that the inner rod can be positioned relative to the outer cylinder.

36. The push rod device according to claim 23 or 26, characterized in that: The core may be one of a soft iron core, a nano-scale rare earth structure and a silicon steel sheet stacking structure.

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