CN218431527U - Folding seat and folding vehicle - Google Patents

Abstract

The utility model discloses a folding seat and a folding vehicle, which comprises a seat, a backrest, a traction piece and a locking piece, wherein the rear end of the seat is provided with a locking part, the backrest is pivoted with the seat, and the locking piece is movably arranged on the backrest; the traction piece is arranged on the backrest, one end of the traction piece is connected with the locking piece and drives the locking piece to extend out or retract into the backrest, so that the traction piece extends out and is clamped and locked with the locking part when the backrest is unfolded relative to the seat. The backrest of the folding chair of the utility model can be independently opened or folded, and has the advantages of simple structure and simple operation.

Description

Folding seat and folding vehicle

Technical Field

The utility model relates to a folding car especially relates to a folding seat chair.

Background

In order to facilitate folding, the seat, the backrest and the frame are generally linked together, and when the foldable electric vehicle is folded, the seat and the backrest can be synchronously folded by only driving the frame to fold. For example, a patent of utility model CN204659922U entitled folding seat back linkage folding structure discloses a linkage rod between the frame and the back, wherein the frame drives the seat to move downwards when folding, and the frame drives the linkage rod at the same time, so that the linkage rod drives the back to fold. Although this folding method can reduce the operation of the user and provide convenience for folding or unfolding the entire vehicle, the seat height of the frame cannot be adjusted for use because the backrest is also folded when the frame is adjusted, and the seat cannot be used. Therefore, the folding bicycle is difficult to adapt to users with different heights. In order to solve the above problems, the backrest and the frame must be separated, when the height of the seat is adjusted by the frame, the backrest is still in an open state, and when the frame is completely folded, the backrest can also be completely folded.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a folding seat chair, it is backed and can be opened or fold up independently, has simple structure, easy operation's advantage.

Another object of the present invention is to provide a foldable cart with adjustable height of the seat, simplified structure, easy operation and small volume after being folded.

In order to achieve the purpose, the utility model provides a folding chair, which comprises a chair seat, a backrest, a traction piece and a locking piece, wherein the rear end of the chair seat is provided with a locking part, the backrest is pivoted with the chair seat, and the locking piece is movably arranged on the backrest; the traction piece is arranged on the backrest, one end of the traction piece is connected with the locking piece and drives the locking piece to extend out or retract into the backrest, so that the traction piece extends out and is clamped and locked with the locking part when the backrest is unfolded relative to the seat.

Compared with the prior art, the backrest of the utility model is pivoted on the chair seat, so that the backrest can rotate relative to the chair seat, when the backrest rotates towards the direction of the chair seat and is closed, the backrest and the chair seat are in a folding state, and when the backrest rotates away from the direction of the chair seat and is opened, the backrest and the chair seat are in an unfolding state; and a locking piece is movably arranged on the backrest, the locking part is arranged on the seat, and a traction piece is utilized to drive the locking piece to be clamped or separated from the locking part, so that the locking piece and the locking part are locked or unlocked with each other, therefore, the backrest and the seat can be locked with each other when being unfolded or can be folded with each other after being unlocked, and the structure is very simple. Therefore, when the foldable seat is applied to the foldable vehicle, the foldable seat can be unfolded or folded independently without being linked with the foldable vehicle for folding, so that more linkage structures for linking the foldable seat with the foldable vehicle can be omitted, and the structure of the foldable vehicle is further simplified. In addition, when the folding bicycle is operated, only the traction piece needs to be operated to move, the traction piece can drive the locking piece and the locking part to be unlocked and folded, the operation is very convenient and fast, after the folding bicycle is folded, the backrest is close to the chair seat, the size of the folded folding bicycle is further reduced, and the convenience of storage or carrying is improved.

Preferably, the folding seat further comprises an operating switch, the operating switch is disposed at the rear side of the backrest, and the other end of the traction member extends to the rear side of the backrest and is connected with the operating switch. The traction piece is convenient for a user to operate and cannot influence riding. Through setting up operating switch, can make the user operate more conveniently draw the piece, improve the convenience of releasing the lock.

Preferably, the folding seat further comprises a reset piece, the reset piece is arranged between the backrest and the locking piece and provides an elastic force for enabling the locking piece to extend out of the backrest. Through setting up the piece that resets, utilize the elastic force of the piece that resets, can make the locking piece can automatic with the sticking department block is connected, thereby makes backrest with the seat support reaches the purpose of automatic locking, has simplified the step of operation, improves the convenience of using.

Specifically, the locking portion is provided with a guide slope to guide the locking member to retract into the backrest to avoid interference during the process of unfolding the backrest relative to the seat.

Preferably, the backrest comprises a support arm and a back plate, the support arm is pivoted to the seat, the back plate is fixed to the support arm, the locking member is slidably arranged at one end of the support arm close to the seat, and the traction member penetrates through the support arm and is connected with the locking member.

Preferably, the folding seat further comprises a positioning mechanism disposed between the backrest and the seat to position the backrest. By arranging the positioning mechanism, the backrest and the seat can be accurately positioned before the locking piece and the locking part are locked, so that the accuracy of the alignment of the locking piece and the locking part is improved, and the backrest and the seat can be relatively positioned after the locking piece and the locking part are unlocked, so that the backrest is prevented from being accidentally overturned due to sudden unlocking with the seat, and the use safety is improved.

Specifically, the positioning mechanism comprises a positioning protrusion and a positioning recess, the positioning protrusion is arranged on one of the backrest and the seat, the positioning recess is arranged on the other of the backrest and the seat, and when the locking piece is engaged with the locking portion, the positioning protrusion is engaged in the positioning recess. Through protruding and the concave cooperation in location, can make the back with the seat support can be fixed a position fast accurately, and the location is simple and convenient.

Specifically, the positioning mechanism further comprises an elastic member, and the elastic member provides an elastic force for enabling the positioning protrusion to extend into the positioning recess. Utilize the elastic component promotes the location is protruding, can make the protruding automation of location with the concave cooperation in location improves the convenience of using.

Specifically, the rear end of the seat extends out of a pivoting part, the backrest is pivoted to the pivoting part, and the positioning recess is formed in the pivoting part. Through the arrangement of the pivot joint part, the backrest can be connected with the backrest, and the positioning mechanism can be hidden inside the backrest, so that the folding seat is simpler and more attractive.

Preferably, the locking member is a locking pin, the locking portion is provided with a locking hole, and the locking pin is inserted into the locking hole to realize the snap locking.

A folding bicycle comprises a front frame, a rear frame, a first supporting rod, a second supporting rod, a third supporting rod and a folding seat, wherein the front frame is arranged in a sliding manner relative to the rear frame along the front and rear directions; the lower end of the first supporting rod is pivoted to the front end of the rear frame, and the upper end of the first supporting rod is pivoted to the lower end of the third supporting rod; the lower end of the second supporting rod is pivoted to the rear end of the front frame, and the upper end of the second supporting rod is pivoted to the front end of the seat of the folding seat; the first supporting rod and the second supporting rod are crosswise pivoted; the upper end of the third supporting rod is pivoted to the rear end of the seat of the folding seat.

Preferably, the vehicle further comprises an electric driving device, wherein the electric driving device is arranged between the front frame and the rear frame to drive the front frame and the rear frame to slide relatively. The electric driving device is used for driving the front frame and the rear frame to move, so that the folding bicycle can be automatically folded or unfolded, manual operation is not needed, the folding bicycle is convenient and quick to use, and the experience is excellent. In addition, the electric driving device is provided with a telescopic end and can drive the relative sliding distance of the front frame and the rear frame, so that the height of the folding seat can be adjusted through the swinging of the first supporting rod, the second supporting rod and the third supporting rod, and the folding seat can be suitable for users without heights to use.

Preferably, the steering device further comprises a steering shaft, a control rod, a connecting piece, a steering piece and a steering arm, wherein the steering shaft is rotatably arranged at the front end of the front frame, the control rod is arranged at the front end of the steering shaft, and the connecting piece is fixedly connected between the steering shaft and the control rod; the steering member is fixedly connected to the steering shaft, one end of the steering arm is pivoted to the steering member, and the other end of the steering arm is pivoted to the wheel seat so as to drive the wheel seat to swing. The control rod is connected with the steering shaft through the connecting piece, so that the control rod is positioned at the front end of the steering shaft, the distance from the control rod to the seat can be increased, the riding space of the folding bicycle is increased, and the riding comfort is improved.

Drawings

Fig. 1 is a top perspective view of the foldable vehicle of the present invention.

Fig. 2 is a bottom perspective view of the foldable cart of the present invention.

Fig. 3 is a side view of the folding cart of the present invention.

Fig. 4 is a perspective view of the folding seat of the folding vehicle of the present invention when unfolded.

Fig. 5 is an exploded view of the folding seat of the folding cart of the present invention.

Fig. 6 is a sectional view of the folding seat of the folding cart of the present invention.

Fig. 7 is an enlarged view of a portion a in fig. 6 according to the present invention.

Fig. 8 is a state diagram of the foldable seat of the foldable vehicle of the present invention when completely folded.

Fig. 9 is an enlarged view of the portion B of fig. 2 according to the present invention.

Fig. 10 is a view showing the rotation state of the rods when the foldable vehicle of the present invention is folded.

Detailed Description

In order to explain technical contents, structural features, and effects achieved by the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

As shown in fig. 1 to 6, the foldable vehicle 100 of the present invention includes a front frame 1, a rear frame 2, a first support rod 3, a second support rod 4, a third support rod 5 and a foldable seat 6, wherein the first support rod 3, the second support rod 4 and the third support rod 5 form a seat folding support, and two sets of seat folding supports are respectively symmetrically disposed on the left and right sides of the foldable vehicle 100. The folding seat 6 is arranged between the upper ends of the two groups of seat folding supports. The front frame 1 is arranged relative to the rear frame 2 in a sliding manner along the front and rear directions; the lower end of the first supporting rod 3 is pivoted to the front end of the rear frame 2, and the upper end of the first supporting rod is pivoted to the lower end of the third supporting rod 5; the lower end of the second support rod 4 is pivoted to the rear end of the front frame 1. The first support rod 3 and the second support rod 4 are crosswise pivoted. The folding seat 6 comprises a seat 61, a backrest 62, a traction piece 63 and locking pieces 64, wherein the number of the traction piece 63 and the locking pieces 64 is two, and the two traction pieces 63 and the two locking pieces 64 are respectively and symmetrically arranged on the left side and the right side of the rear end of the seat 61 so as to lock or unlock two sides of the backrest 62 together. The upper end of the second support rod 4 is pivoted to the lower side of the front end of the chair seat 61; the upper end of the third support rod 5 is pivoted to the lower side of the rear end of the chair seat 61. A locking part 611 is arranged at the lower side of the rear end of the seat 61, the upper end of the third support rod 5 is pivoted to the locking part 611, the backrest 62 is pivoted to the seat 61, and the locking part 64 is movably arranged on the backrest 62. The pulling member 63 is disposed on the backrest 62, and one end of the pulling member is connected to the locking member 64 and drives the locking member 64 to extend out or retract into the backrest 62, so as to extend out and engage with the locking portion 611 when the backrest 62 is unfolded relative to the seat 61. In this embodiment, the locking member 64 is a cylindrical locking pin, the locking portion 611 is provided with a locking hole 611a, and the locking pin is inserted into the locking hole 611a to realize the snap-fit locking.

Referring to fig. 4 to 6, a pivoting portion 612 extends from the rear end of the seat 61, the backrest 62 includes a support arm 621 and a back plate 622, the support arm 621 is symmetrically disposed on the left and right sides of the rear end of the seat 61, the lower end of the support arm 621 is pivoted to the pivoting portion 612, the back plate 622 is fixed on the support arm 621, the locking member 64 is slidably disposed inside the support arm 621 near one end of the seat 61, and the traction member 63 passes through the inside of the support arm 621 and is connected to the locking member 64. More specifically, a seat body 623 is disposed at an end of the inside of the support arm 621 close to the seat 61, a sliding hole 623a is disposed in the seat body 623, a central axis direction of the sliding hole 623a is along a length extending direction of the support arm 621, and the locking member 64 is slidably disposed in the sliding hole 623a to extend out of or retract into the lower end of the support arm 621.

As further shown in fig. 6 and 7, the folding seat 6 further includes a reset member 66, and the reset member 66 is disposed between the backrest 62 and the locking member 64 and provides an elastic force to make the locking member 64 extend out of the backrest 62. Specifically, the reset element 66 is disposed in the sliding hole 623a, and one end of the reset element abuts against the seat 623, and the other end of the reset element abuts against the locking element 64. By arranging the reset piece 66, the locking piece 64 can be automatically clamped and connected with the locking part 611 by utilizing the elastic force of the reset piece 66, so that the backrest 62 and the seat 61 can be automatically locked, the operation steps are simplified, and the use convenience is improved. The locking portion 611 is provided with a guide slope 611b to guide the locking member 64 to be retracted into the backrest to avoid interference during the process of expanding the backrest 62 with respect to the seat 61. In this embodiment, the reset member 66 is a compression spring, and the compression spring is sleeved on the locking pin.

Referring to fig. 4 and 5, the folding seat 6 further includes an operating switch 67, the operating switch 67 is disposed at the rear side of the backrest 62, one end of the pulling member 63 extends from the support arm 621 into the sliding hole 623a and is connected to the end of the locking member 64, and the other end of the pulling member 63 extends to the rear side of the backrest 62 and is connected to the operating switch 67. The two pulling members 63 on both sides of the two folding seats 6 are connected to the same operation switch 67, so that the locking members 64 on both sides can be driven to disengage from the locking holes 611a simultaneously by operating the operation switch 67 once. The traction member 63 can be operated conveniently by a user without influencing the riding. By arranging the operation switch 67, the user can operate the traction piece 63 more conveniently, and the convenience of unlocking is improved.

As shown in fig. 5 to 7, the folding seat 6 further includes a positioning mechanism 68, and the positioning mechanism 68 is disposed between the backrest 62 and the seat 61 to position the backrest 62. By providing the positioning mechanism 68, the backrest 62 can be accurately positioned with respect to the seat 61 before the locking member 64 and the locking portion 611 are locked, so as to improve the accuracy of the alignment between the locking member 64 and the locking portion 611, and the backrest 62 can be positioned with respect to the seat 61 after the locking member 64 and the locking portion 611 are unlocked, so as to prevent the backrest 62 from accidentally overturning due to sudden unlocking with respect to the seat 61, thereby improving the safety of use.

As shown in fig. 5 to 7, specifically, the positioning mechanism 68 includes a positioning protrusion 681, a positioning recess 682 and an elastic member 683, the positioning protrusion 681 is disposed on one of the backrest 62 and the seat 61, the positioning recess 682 is disposed on the other of the backrest 62 and the seat 61, a front end of the positioning protrusion 681 is a protruding spherical surface, and the positioning recess 682 is an inwardly recessed spherical surface. When the locking piece 64 is engaged with the locking part 611, the spherical surface of the positioning projection 681 is engaged with the spherical surface of the positioning recess 682. Through the cooperation of the positioning protrusions 681 and the positioning recesses 682, the backrest 62 and the seat 61 can be quickly and accurately positioned, and the positioning is simple and convenient. More specifically, the supporting arm 621 is provided with a through hole, and the positioning protrusion 681 is slidably disposed in the through hole, and can extend out of or retract into the through hole, and the extending direction is perpendicular to the sliding direction of the locking pin. The positioning recesses 682 are disposed on the inner side of the pivot joint 612, so that the pivot joint 612 can connect with the backrest 62 and hide the positioning mechanism 68 inside, thereby making the folding seat 6 more compact and beautiful. The elastic member 683 is disposed inside the supporting arm 621, and one end of the elastic member 683 abuts against the positioning protrusion 681, and the elastic member 683 provides an elastic force for the positioning protrusion 681 to extend into the positioning recess 682. The elastic member 683 is utilized to push the positioning projection 681, so that the positioning projection 681 is automatically matched with the positioning groove 682, and the use convenience is improved.

As shown in fig. 1 and 2, the foldable vehicle 100 further includes an electric driving device 7, and the electric driving device 7 is disposed between the front frame 1 and the rear frame 2 to drive the front frame 1 and the rear frame 2 to slide relatively. The electric driving device 7 is an electric push rod. The electric driving device 7 is used for driving the front frame 1 and the rear frame 2 to move, so that the folding vehicle 100 can be automatically folded or unfolded without manual operation, and the folding vehicle is convenient and quick to use and excellent in experience. In addition, by arranging the electric driving device 7, the electric driving device 7 has a telescopic end which can drive the relative sliding distance of the front frame 1 and the rear frame 2, so that the height of the folding seat 6 can be adjusted by the swinging of the first supporting rod 3, the second supporting rod 4 and the third supporting rod 5, thereby being suitable for users without height.

As shown in fig. 1, fig. 2 and fig. 9, the foldable cart 100 further includes a steering shaft 8, a control rod 9, a connecting member 10, a steering member 110 and a steering arm 120, wherein the steering shaft 8 is rotatably disposed at a front end of the front frame 1, the control rod 9 is disposed at a front end of the steering shaft 8, and the connecting member 10 is fixedly connected between the steering shaft 8 and the control rod 9; the steering member 110 is fixedly connected to the steering shaft 8, and one end of the steering arm 120 is pivotally connected to the steering member 110, and the other end is pivotally connected to the wheel seat, so as to drive the wheel seat to swing. The control rod 9 is connected with the steering shaft 8 through the connecting piece 10, so that the control rod 9 is positioned at the front end of the steering shaft 8, the distance from the control rod 9 to the seat 61 can be increased, the sitting space of the folding bicycle 100 is increased, and the sitting comfort is improved.

With reference to fig. 8 and 10, the folding principle of the foldable cart 100 of the present invention is described in detail as follows:

when the front frame 1 extends forwards out of the rear frame 2, the first support rod 3, the second support rod 4 and the third support rod 5 extend, the backrest 62 is opened relative to the seat 61, the positioning protrusion 681 is engaged with the positioning recess 682, and the locking member 64 is inserted into the locking hole 611a.

When folding the car 100 when folding up when needs folding up, the user can upwards pull operating switch 67 first, operating switch 67 drives pull 63, pull 63 pull locking piece 64 makes locking piece 64 break away from locking piece 64, then, impel hard lean against 62 to seat support 61 direction is close to the upset, at this moment, protruding 681 of location breaks away from location concave 682, lean against 62 can overturn and press close to the position of seat support 61. Then, the electric driving device 7 may be started, the electric driving device 7 drives the front frame 1 and the rear frame 2 to slide relatively, the front frame 1 and the rear frame 2 slide in the front and rear directions to approach each other, meanwhile, the front frame 1 drives the lower end of the second support rod 4 to move backward relative to the rear frame 2, and the rear frame 2 drives the lower end of the first support rod 3 to move forward relative to the front frame 1. The third support rod 5 swings, so that the seat 61 moves downward to be close to the rear frame 2, and finally is attached to the rear frame 2. At this time, the foldable cart 100 can be folded. When the seat is unfolded again, the electric driving device 7 is started to enable the front frame 1 and the rear frame 2 to be unfolded in a sliding mode, and therefore the seat 61 is lifted. Finally, open back 62 for back 62 rotates to the direction of keeping away from seat 61, when locking piece 64 reaches the locking portion 611 front end, under the guide of direction inclined plane 611b, locking piece 64 retracts in the support arm 621 of back 62 in, when back 62 accomplishes the back of opening, location protruding 681 card in the concave 682 of location, just locking piece 64 aligns locking hole 611a and resets and 66 elastic force down automatic stretching into in the locking hole 611a, make back 62 with seat 61 expand and be in the locking state.

Compared with the prior art, the backrest 62 of the utility model is pivoted to the seat 61, so that the backrest 62 can rotate relative to the seat 61, when the backrest 62 rotates towards the seat 61, the backrest 62 and the seat 61 are folded, and when the backrest 62 rotates towards the direction far away from the seat 61, the backrest 62 and the seat 61 are unfolded; the backrest 62 is movably provided with the locking member 64, the seat 61 is provided with the locking portion 611, and the traction member 63 drives the locking member 64 to be engaged with or disengaged from the locking portion 611, so that the locking member 64 and the locking portion 611 are locked or unlocked with each other, and therefore, the backrest 62 and the seat 61 are locked with each other when being unfolded or can be folded with each other after being unlocked, and the structure is very simple. Thus, when the foldable vehicle 100 is used, the backrest 62 can be unfolded or folded independently without being linked with the foldable vehicle 100, so that the linkage structure for linking the foldable seat 6 with the foldable vehicle 100 can be omitted, thereby further simplifying the structure of the foldable vehicle 100. And, set up the utility model discloses a behind the folding seat chair 100, through the state of folding up of frame 1 and back frame 2 before adjusting, can realize right the altitude mixture control of seat support 61, it can not influence the state that leans against 62, therefore, the frame can use under the state of difference, and then adapts to the use crowd who does not need the height. In addition, the foldable seat 100 of the present invention only needs to drive the pulling member 63 to move during the operation, and the pulling member 63 can drive the locking member 64 and the locking portion 611 to release the lock and fold, so that the operation is very convenient and fast. After folding, the backrest 62 is close to the seat 61, so as to further reduce the folded volume of the folding vehicle 100 and improve the convenience of storage or carrying.

The above disclosure is only a preferred embodiment of the present invention, and certainly, the scope of the present invention should not be limited thereto, and the same changes and modifications as the claims of the present invention are also included.

Claims (13)

1. A folding seat, characterized in that: the backrest is pivoted to the seat, and the locking piece is movably arranged on the backrest; the traction piece is arranged on the backrest, one end of the traction piece is connected with the locking piece and drives the locking piece to extend out or retract into the backrest, so that the traction piece extends out and is clamped and locked with the locking part when the backrest is unfolded relative to the seat.

2. A folding seat as claimed in claim 1, wherein: the folding seat further comprises an operating switch, the operating switch is arranged on the rear side of the backrest, and the other end of the traction piece extends to the rear side of the backrest and is connected with the operating switch.

3. A folding seat as claimed in claim 1, wherein: the folding seat further comprises a resetting piece, wherein the resetting piece is arranged between the backrest and the locking piece and provides an elastic force for enabling the locking piece to extend out of the backrest.

4. A folding seat as claimed in claim 3, wherein: the locking part is provided with a guide inclined surface so as to guide the locking part to retract into the backrest in the process of unfolding the backrest relative to the seat to avoid interference.

5. A folding seat as claimed in claim 1, wherein: the backrest comprises a support arm and a back plate, the support arm is pivoted to the seat, the back plate is fixed to the support arm, the locking piece is slidably arranged at one end, close to the seat, of the support arm, and the traction piece penetrates through the support arm and is connected with the locking piece.

6. A folding seat as claimed in claim 1, wherein: the folding seat further comprises a positioning mechanism, and the positioning mechanism is arranged between the backrest and the seat to position the backrest.

7. A folding seat as claimed in claim 6, in which: the positioning mechanism comprises a positioning protrusion and a positioning recess, the positioning protrusion is arranged on the backrest and one of the seat supports, the positioning recess is arranged on the backrest and the other of the seat supports, and when the locking piece is clamped with the locking part, the positioning protrusion is clamped in the positioning recess.

8. A folding seat as claimed in claim 7, in which: the positioning mechanism further comprises an elastic piece, and the elastic piece provides elastic force for enabling the positioning protrusion to extend into the positioning recess.

9. A folding seat as claimed in claim 7, wherein: the back rest is pivoted to the pivoting part, and the positioning recess is arranged on the pivoting part.

10. A folding seat as claimed in any one of claims 1 to 9, wherein: the locking piece is a locking pin, a locking hole is formed in the locking portion, and the locking pin is inserted into the locking hole to achieve clamping locking.

11. The utility model provides a folding bicycle which characterized in that: comprising a front frame, a rear frame, a first support bar, a second support bar, a third support bar, and the folding seat of any one of claims 1 to 10, the front frame being slidably disposed in a front and rear direction with respect to the rear frame; the lower end of the first supporting rod is pivoted to the front end of the rear frame, and the upper end of the first supporting rod is pivoted to the lower end of the third supporting rod; the lower end of the second supporting rod is pivoted to the rear end of the front frame, and the upper end of the second supporting rod is pivoted to the front end of the seat of the folding seat; the first supporting rod and the second supporting rod are crosswise pivoted; the upper end of the third supporting rod is pivoted to the rear end of the seat of the folding seat.

12. The folding cart of claim 11, wherein: the electric driving device is arranged between the front frame and the rear frame to drive the front frame and the rear frame to slide relatively.

13. The folding cart of claim 11, wherein: the steering mechanism is characterized by further comprising a steering shaft, a control rod, a connecting piece, a steering piece and a steering arm, wherein the steering shaft is rotatably arranged at the front end of the front frame, the control rod is positioned at the front end of the steering shaft, and the connecting piece is fixedly connected between the steering shaft and the control rod; the steering piece is fixedly connected to the steering shaft, one end of the steering arm is pivoted to the steering piece, and the other end of the steering arm is pivoted to the wheel seat so as to drive the wheel seat to swing.

Images