Retractable and expandable wheel leg structure

Abstract

The invention discloses a wheel leg structure capable of being folded and unfolded, and relates to the field of wheel carrier structures. According to the technical scheme, the wheel leg structure comprises a main body, guide rails, sliding blocks, wheel rods and rolling wheels; the guide rail is vertically arranged on the main body, the sliding block is in sliding fit with the guide rail, a clamping mechanism is arranged between the guide rail and the sliding block, and the clamping mechanism enables the sliding block to be fixed to the upper section or the lower section of the guide rail; the upper ends of the two wheel rods are located on the two sides of the guide rail respectively, the lower ends of the two wheel rods are obliquely arranged in the opposite directions, the wheel rods are in sliding fit relative to the main body, the upper ends of the wheel rods are connected with the sliding blocks through connecting rods, and rolling wheels are arranged at the lower ends of the wheel rods. The retraction or extension of the wheel rod relative to the main body can be well realized, the state of the wheel rod can be locked and unlocked, and the wheel rod is kept in the retraction or extension state. A user can select to use according to actual needs.

Description

Technical Field

[0001] The present invention relates to the field of wheel frame structures, and particularly to a retractable and deployable wheel leg structure. Background Art

[0002] Currently, for transfer tools such as suitcases and trolleys, the distance between the rollers is usually fixed. A shorter wheelbase of the rollers occupies less space, but the center of gravity is too high, and it is easy to tip over during transfer. If the wheelbase is too long, the center of gravity is low and the movement is more stable, but the occupied space is too large. If the distance between the rollers is fixed, it is impossible to reasonably utilize the space for selection. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a retractable and deployable wheel leg structure, which can well realize the retraction or extension of the wheel rod relative to the main body, and can lock and unlock it, and the wheel rod is kept in the retracted or extended state.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a retractable and deployable wheel leg structure, including a main body, a guide rail, a slider, a wheel rod and a roller;

[0005] The main body is vertically provided with the guide rail, the slider is slidably matched with the guide rail, and a clamping mechanism is arranged between the guide rail and the slider, and the clamping mechanism fixes the slider to the upper or lower section of the guide rail;

[0006] The upper ends of the two wheel rods are respectively located on both sides of the guide rail, the lower ends of the two wheel rods are inclined in opposite directions, the wheel rod is slidably matched with the main body, the upper end of the wheel rod is connected to the slider through a connecting rod, and the lower end of the wheel rod is provided with a roller.

[0007] Since the upper end of the wheel rod is connected to the slider through a connecting rod, when the slider is located at the upper part of the guide rail, the wheel rod will retract, and when the slider is located at the lower part of the guide rail, the wheel rod will extend. And since the two wheel rods are inclined in opposite directions, when the wheel rod extends, the distance between the lower parts of the wheel rods will be farther apart, so as to lower the overall center of gravity and better play the role of moving and carrying. When retracted, the distance is closer and it can occupy less space.

[0008] Preferably, the main body is provided with a plurality of guide wheels adapted to the side of the wheel rod. The use of guide wheels can reduce the friction between the wheel rod and the main body.

[0009] Preferably, the lower ends of the two wheel rods are cross-distributed on the other side of the guide rail. It occupies less space when retracted and has a sufficient distance when extended.

[0010] Preferably, the clamping mechanism includes a sliding rod, a first locking block and a second locking block;

[0011] The sliding rod is axially slidably matched in the guide rail, and a reset elastic member is provided between the sliding rod and the guide rail, and the reset elastic member slides the sliding rod toward the first end of the guide rail;

[0012] The side wall of the guide rail is provided with a control window, and the side wall of the sliding rod is provided with a driving inclined surface; the control window is slidably matched with an inclined surface push rod, and the front end of the inclined surface push rod is provided corresponding to the driving inclined surface;

[0013] The first locking block and the second locking block are respectively arranged at the upper section and the lower section corresponding to the guide rail.

[0014] The first locking block is provided with a first control inclined surface and a first pin rod portion; the side wall of the sliding rod is provided with a first locking inclined surface adapted to the first control inclined surface, the upper side wall of the guide rail is provided with a first locking hole adapted to the first pin rod portion, and the first locking block is provided with a first locking elastic member pushed toward the first locking hole;

[0015] The second locking block is provided with a second control inclined surface and a second pin rod portion; the side wall of the sliding rod is provided with a second locking inclined surface adapted to the second control inclined surface, the lower section side wall of the guide rail is provided with a second locking hole adapted to the second pin rod portion, and the second locking block is provided with a second locking elastic member pushed toward the second locking hole;

[0016] The first locking inclined surface and the first control inclined surface, and the second locking inclined surface and the second control inclined surface are aligned in only one set at the same time;

[0017] When the inclined plane push rod slides toward the end away from the driving inclined plane;

[0018] Under the push of the reset elastic member, the sliding rod slides downward; the first locking inclined surface pushes the first control inclined surface, the first locking inclined surface contacts and staggers with the first control inclined surface, the first locking block slides in a direction away from the first locking hole, and the first pin portion retracts into the first locking hole; the second locking inclined surface contacts and aligns with the second control inclined surface, the second locking elastic member pushes the second locking block to slide toward the second locking hole, and the second pin portion extends from the second locking hole to the outside;

[0019] When the inclined plane push rod slides toward the end close to the driving inclined plane;

[0020] Under the push of the inclined surface ejector rod on the driving inclined surface, the sliding rod slides upward; the second locking inclined surface pushes the second control inclined surface to contact and align, the second locking inclined surface pushes the second control inclined surface to contact and stagger, the second locking block slides in a direction away from the second locking hole, and the second pin rod part retracts into the second locking hole; the first locking inclined surface contacts and aligns with the first control inclined surface, the first locking elastic member pushes the first locking block to slide towards the first locking hole, and the first pin rod part extends from the first locking hole to the outside;

[0021] The slider is provided with an outer hole adapted to the first pin rod part or the second pin rod part.

[0022] In the initial state, the slider is located in the upper first section, and is caught in the outer hole and the first locking hole at the upper end of the side wall of the guide rail by the first pin rod part extending to the outside. The slider is locked in the upper section of the guide rail. At this time, the wheel rod retracts into the main body and is locked.

[0023] When the wheel rod needs to be extended, when the inclined surface ejector rod slides towards one end away from the driving inclined surface; the first pin rod part retracts into the first locking hole, the slider is unlocked in the upper section, and under the action of the self-gravity of the wheel rod, the slider drives the slider to slide downward to the lower section. The second pin rod part extends from the second locking hole to the outside, and the second pin rod part is caught in the outer hole and the second locking hole at the lower section of the side wall of the guide rail, thereby locking the slider in the lower section of the guide rail.

[0024] When the wheel rod needs to be retracted, when the inclined surface ejector rod slides towards one end close to the driving inclined surface under the drive of an external force, the second pin rod part retracts into the second locking hole, the slider is unlocked in the lower section, and under the action of the self-gravity of the main body, the slider slides upward to the upper section. The first pin rod part extends from the first locking hole to the outside, and the first pin rod part is caught in the outer hole of the slider and the first locking hole at the upper section of the guide rail, thereby locking the slider in the upper section of the guide rail.

[0025] Through the above, the locking and unlocking of the slider in the upper and lower sections can be realized, so as to realize the retraction and extension of the wheel leg.

[0026] Preferably, a first control groove is provided on the side wall of the sliding rod, and the first locking inclined surface is provided on one side of the bottom of the first control groove. It can improve the space utilization rate.

[0027] Preferably, a second control groove is provided on the side wall of the sliding rod, and the second locking inclined surface is provided on one side of the bottom of the second control groove. It can improve the space utilization rate.

[0028] Preferably, a third control groove is provided on the sliding rod corresponding to the control window, and the driving inclined surface is provided on one side of the bottom of the third control groove. It can improve the space utilization rate.

[0029] Preferably, inclined guide openings are respectively arranged at two ends of the slider corresponding to the first pin rod portion and the second pin rod portion. When the slider slides close to the first pin rod portion or the second pin rod portion, by inwardly pressing the outer ends thereof, the slider can be adapted to the outer holes.

[0030] Preferably, the slider is provided with a through hole, and the guide rail slidably penetrates through the through hole. This can improve the stability of the cooperation between the slider and the guide rail.

[0031] Advantages of the present invention:

[0032] Through the above solutions, the retraction or extension of the wheel rod relative to the main body can be well achieved, and the wheel rod can be locked and unlocked. The wheel rod can be maintained in the retracted or extended state. When extended, the distance of the roller is farther, the center of gravity is lower, but the occupied space is larger. When retracted, the distance of the roller is shorter, and it can be pushed more stably, the center of gravity is higher, and the occupied space is smaller. Users can choose to use according to actual needs. Description of the drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only eleven of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 Schematic diagram of the state of the extended wheel rod in the embodiment of the present invention;

[0035] Figure 2 Schematic diagram of the state of the retracted wheel rod in the embodiment of the present invention;

[0036] Figure 3 Schematic diagram of the slider and the connecting rod in the embodiment of the present invention;

[0037] Figure 4 One of the exploded views of the guide rail, the sliding rod, the first locking block and the second locking block in the embodiment of the present invention;

[0038] Figure 5 Another exploded view of a part of the guide rail, the sliding rod, the first locking block and the second locking block in the embodiment of the present invention;

[0039] Figure 6 Schematic diagram of the slider in the lower section and the second pin rod portion extending to the outer hole in the embodiment of the present invention;

[0040] Figure 7 Schematic diagram of the slider in the lower section and the second pin rod portion retracting from the outer hole in the embodiment of the present invention;

[0041] Figure 8 A schematic diagram of a slider in an embodiment of the present invention being in an upper section and the first pin portion about to extend into the outer hole;

[0042] Figure 9 A schematic diagram of a slider in an embodiment of the present invention being in an upper section and the first pin portion extending out of the outer hole;

[0043] Figure 10 A schematic diagram of a state in which the rotating plate of the embodiment of the present invention does not squeeze the inclined ejector rod;

[0044] Figure 11 A schematic diagram of the state of the rotating plate extruding the inclined ejector rod according to an embodiment of the present invention;

[0045] Among them, 1. guide rail; 2. slider; 3. outer hole; 4. oblique guide port; 5. wheel rod; 6. connecting rod; 7. roller; 8. guide wheel; 9. sliding rod; 10. first locking inclined plane; 11. second locking inclined plane; 12. first locking block; 13. first control inclined plane; 14. first pin rod part; 15. second locking block; 16. second control inclined plane; 17. second pin rod part; 18. reset elastic member; 19. control window; 20. inclined top rod; 21. driving inclined plane; 22. first locking hole; 23. first locking elastic member; 24. second locking hole; 25. second locking elastic member; 26. first control groove; 27. second control groove; 28. third control groove; 29. ​​toggle inclined plane; 30. rotating plate; 31. square tube; 32. positioning rod. DETAILED DESCRIPTION

[0046] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the protection scope of the present invention.

[0047] Example

[0048] like Figure 1 and Figure 2 As shown, the retractable and unfoldable wheel-leg structure includes a main body, a guide rail 1, a slider 2, a wheel rod 5 and a roller 7;

[0049] The main body is vertically provided with the guide rail 1, the slider 2 is slidably matched with the guide rail 1, and a locking mechanism is provided between the guide rail 1 and the slider 2, and the locking mechanism fixes the slider 2 to the upper section or the lower section of the guide rail 1; Figure 4 As shown, in this embodiment, the guide rail 1 includes an external square tube 31 and an internal positioning rod 32 . The positioning rod 32 is fixed in the square tube 31 , and the positioning rod 32 is used to set the special-shaped structure in the square tube 31 .

[0050] The upper ends of the two wheel rods 5 are respectively located on both sides of the guide rail 1, and the lower ends of the two wheel rods 5 are inclined in opposite directions. The wheel rods 5 are slidably fitted relative to the main body. Combining Figure 3 As shown, the upper end of the wheel rod 5 is connected to the slider 2 through a connecting rod 6, and a roller 7 is arranged at the lower end of the wheel rod 5.

[0051] Since the upper end of the wheel rod 5 is connected to the slider 2 through the connecting rod 6, when the slider 2 is located at the upper part of the guide rail 1, the wheel rod 5 will retract. When the slider 2 is located at the lower part of the guide rail 1, the wheel rod 5 will extend. And because the two wheel rods 5 are inclined in opposite directions, when the wheel rod 5 extends, the distance between the lower parts of the wheel rods 5 will be farther apart, so as to lower the overall center of gravity and better play the role of moving and carrying. When retracting, the distance is closer and it can occupy a smaller space. When extending, the distance between the rollers 7 is farther and the center of gravity is lower, but the occupied space is larger. When retracting, the distance between the rollers 7 is shorter, the center of gravity is higher, and the occupied space is smaller.

[0052] The main body is provided with a plurality of guide wheels 8 adapted to the side parts of the wheel rods 5. The use of the guide wheels 8 can reduce the friction between the wheel rods 5 and the main body.

[0053] The lower ends of the two wheel rods 5 are cross-distributed on the other side of the guide rail 1. The occupied space is smaller when retracting, and the distance is also large enough when extending.

[0054] Combining Figure 5 As shown, the clamping mechanism includes a sliding rod 9, a first locking block 12 and a second locking block 15;

[0055] The sliding rod 9 is axially slidably fitted inside the guide rail 1, and a reset elastic member 18 is arranged between the sliding rod 9 and the guide rail 1. The reset elastic member 18 slides the sliding rod 9 towards the first end of the guide rail 1;

[0056] A control window 19 is arranged on the side wall of the guide rail 1. In this embodiment, the control window 19 is located at the uppermost end of the guide rail 1. A driving inclined surface 21 is arranged on the side wall of the sliding rod 9; a bevel ejector rod 20 is slidably fitted in the control window 19, and the front end of the bevel ejector rod 20 is correspondingly arranged opposite to the driving inclined surface 21; wherein the front inclined surface of the bevel ejector rod 20 is close to the upper side of the upper end of the guide rail 1, and the driving inclined surface 21 is adapted to the front inclined surface of the bevel ejector rod 20.

[0057] Combining Figure 10 and Figure 11As shown, a toggle slope 29 is provided at the rear end of the inclined surface ejector rod 20. The toggle slope 29 is located outside the main body. A rotating plate 30 is provided on one side of the main body corresponding to the toggle slope 29. The rotating plate 30 is rotationally engaged with the main body. During the rotation of the rotating plate 30, the edge of the rotating plate 30 contacts the toggle slope 29 and presses to push the inclined surface ejector rod 20, so as to achieve the effect of more easily pushing the inclined surface ejector rod 20. The application of the rotating plate 30 can be set to work synchronously with other rotating structures of the main body.

[0058] The first locking block 12 and the second locking block 15 are respectively arranged on the upper and lower sections of the guide rail 1 correspondingly.

[0059] The first locking block 12 is provided with a first control slope 13 and a first pin rod part 14; a first locking slope 10 adapted to the first control slope 13 is provided on the side wall of the sliding rod 9. A first locking hole 22 adapted to the first pin rod part 14 is provided on the upper side wall of the guide rail 1. The first locking block 12 is provided with a first locking elastic member 23 that pushes towards the first locking hole 22; among them, the inclination directions of the first control slope 13, the first locking slope 10 and the driving slope 21 are the same.

[0060] The second locking block 15 is provided with a second control slope 16 and a second pin rod part 17; a second locking slope 11 adapted to the second control slope 16 is provided on the side wall of the sliding rod 9. A second locking hole 24 adapted to the second pin rod part 17 is provided on the lower side wall of the guide rail 1. The second locking block 15 is provided with a second locking elastic member 25 that pushes towards the second locking hole 24;

[0061] In this embodiment, the first locking hole 22 includes two parts, a square tube 31 and a positioning rod 32. The second locking hole 22 is the same by analogy.

[0062] Only one group of the first locking slope 10 and the first control slope 13, and the second locking slope 11 and the second control slope 16 are aligned at the same time;

[0063] When the inclined surface ejector rod 20 slides towards the end away from the driving slope 21;

[0064] Under the pushing of the reset elastic member 18, the sliding rod 9 slides downward; the first locking inclined surface 10 pushes the first control inclined surface 13, the first locking inclined surface 10 is in contact and offset with the first control inclined surface 13, the first locking block 12 slides in a direction away from the first locking hole 22, and the first pin rod portion 14 retracts into the first locking hole 22; the second locking inclined surface 11 is in contact and aligned with the second control inclined surface 16, and the second locking elastic member 25 pushes the second locking block 15 to slide towards the second locking hole 24, and the second pin rod portion 17 extends from the second locking hole 24 to the outside; wherein the inclination directions of the second control inclined surface 16, the second locking inclined surface 11 and the driving inclined surface 21 are opposite.

[0065] When the inclined surface ejector rod 20 slides towards one end close to the driving inclined surface 21;

[0066] Under the pushing of the inclined surface ejector rod 20 on the driving inclined surface 21, the sliding rod 9 slides upward; the second locking inclined surface 11 pushes the second control inclined surface 16 to be in contact and aligned, the second locking inclined surface 11 pushes the second control inclined surface 16 to be in contact and offset, the second locking block 15 slides in a direction away from the second locking hole 24, and the second pin rod portion 17 retracts into the second locking hole 24; the first locking inclined surface 10 is in contact and aligned with the first control inclined surface 13, and the first locking elastic member 23 pushes the first locking block 12 to slide towards the first locking hole 22, and the first pin rod portion 14 extends from the first locking 22 hole to the outside;

[0067] The slider 2 is provided with an outer hole 3 adapted to the first pin rod portion 14 or the second pin rod portion 17.

[0068] In this embodiment, the upper and lower sections of the side wall of the square tube 31 are respectively provided with a first locking hole 33 and a second locking hole 34 corresponding to the first pin rod portion 14 and the second pin rod portion 17;

[0069] Combined Figure 8 and Figure 9 As shown, in the initial state, the slider 2 is located at the first upper section, and is clamped into the first locking hole 33 and the outer hole 3 by the first pin rod portion 14 extending to the outside. The slider 2 is locked at the upper section of the guide rail 1. At this time, the wheel rod 5 retracts into the main body and is locked.

[0070] Combined Figure 6 and Figure 7As shown, when the wheel rod 5 needs to extend, when the inclined surface ejector rod 20 slides towards the end away from the driving inclined surface 21; the first pin rod portion 14 retracts into the first locking hole 22, the slider 2 is unlocked in the upper section, and driven by the self - gravity of the wheel rod, the slider 2 slides downwards to the lower section, and the second pin rod portion 17 extends from the second locking hole 24 to the outside, and the second pin rod portion 17 is engaged into the second locking hole 34 and the outer hole 3, thereby locking the slider 2 at the lower section of the guide rail 1.

[0071] When the wheel rod 5 needs to be retracted, when the inclined surface ejector rod 20 slides towards the end close to the driving inclined surface 21 under the drive of an external force, the second pin rod portion 17 retracts into the second locking hole 24, the slider 2 is unlocked in the lower section, and under the action of the self - gravity of the main body, the slider 2 slides upwards to the upper section, and the first pin rod portion 14 extends from the second locking hole 24 to the outside, and the first pin rod portion 14 is engaged into the first locking hole and the outer hole 3, thereby locking the slider 2 at the upper section of the guide rail 1.

[0072] Through the above, the locking and unlocking of the slider 2 at the upper and lower sections can be realized, thereby realizing the retraction and extension of the wheel leg.

[0073] A first control groove 26 is provided on the side wall of the sliding rod 9, and a first locking inclined surface 10 is provided on one side of the bottom of the first control groove 26. It can improve the space utilization rate.

[0074] A second control groove 27 is provided on the side wall of the sliding rod 9, and a second locking inclined surface 11 is provided on one side of the bottom of the second control groove 27. It can improve the space utilization rate.

[0075] The sliding rod 9 is provided with a third control groove 28 corresponding to the control window 19, and a driving inclined surface 21 is provided on one side of the bottom of the third control groove 28. It can improve the space utilization rate.

[0076] Oblique guide ports 4 are respectively provided at both ends of the slider 2 corresponding to the first pin rod portion 14 and the second pin rod portion 17. When the slider 2 slides close to the first pin rod portion 14 or the second pin rod portion 17, by inwardly pressing its outer end, it can be adapted to the outer hole 3.

[0077] The slider 2 is provided with a through - hole, and the guide rail 1 slidably penetrates through the through - hole. It can improve the stability of the cooperation between the slider 2 and the guide rail 1.

[0078] The beneficial effects of the present invention:

[0079] Through the above - mentioned solution, the retraction or extension of the wheel rod 5 relative to the main body can be well realized, and its locking and unlocking can be carried out, and the wheel rod 5 is maintained in the retracted or extended state.

[0080] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0081] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. The retractable and expandable wheel leg structure is characterized by: It comprises a main body, a guide rail (1), a slider (2), a wheel rod (5) and a roller (7); The main body is vertically provided with the guide rail (1), the slider (2) is slidably matched with the guide rail (1), and a locking mechanism is provided between the guide rail (1) and the slider (2), and the locking mechanism fixes the slider (2) to the upper section or the lower section of the guide rail (1); The upper ends of the two wheel rods (5) are respectively located on both sides of the guide rail (1), and the lower ends of the two wheel rods (5) are inclined in opposite directions. The wheel rods (5) are slidably matched relative to the main body. The upper ends of the wheel rods (5) are connected to the slider (2) via a connecting rod (6), and the roller (7) is arranged at the lower ends of the wheel rods (5).

2. The retractable and deployable wheel-leg structure according to claim 1, characterized in that: The main body is provided with a plurality of guide wheels (8) adapted to the side of the wheel rod (5).

3. The retractable and deployable wheel-leg structure according to claim 1, characterized in that: The lower ends of the two wheel rods (5) are cross-distributed toward the other side of the guide rail (1).

4. The retractable and deployable wheel-leg structure according to claim 1, characterized in that: The locking mechanism comprises a sliding rod (9), a first locking block (12) and a second locking block (15); The sliding rod (9) is axially slidably fitted inside the guide rail (1), a reset elastic member (18) is provided between the sliding rod (9) and the guide rail (1), and the reset elastic member (18) slides the sliding rod (9) toward the first end of the guide rail (1); The side wall of the guide rail (1) is provided with a control window (19), and the side wall of the sliding rod (9) is provided with a driving inclined surface (21); the control window (19) is slidably matched with an inclined surface push rod (20), and the front end of the inclined surface push rod (20) is arranged corresponding to the driving inclined surface (21); The first locking block (12) and the second locking block (15) are respectively arranged at the upper section and the lower section corresponding to the guide rail (1). The first locking block (12) is provided with a first control inclined surface (13) and a first pin rod portion (14); the side wall of the sliding rod (9) is provided with a first locking inclined surface (10) adapted to the first control inclined surface (13); the upper side wall of the guide rail (1) is provided with a first locking hole (22) adapted to the first pin rod portion (14); the first locking block (12) is provided with a first locking elastic member (23) pushed toward the first locking hole (22); The second locking block (15) is provided with a second control inclined surface (16) and a second pin rod portion (17); the side wall of the sliding rod (9) is provided with a second locking inclined surface (11) adapted to the second control inclined surface (16); the lower side wall of the guide rail (1) is provided with a second locking hole (24) adapted to the second pin rod portion (17); the second locking block (15) is provided with a second locking elastic member (25) pushed toward the second locking hole (24); Only one set of the first locking inclined surface (10) and the first control inclined surface (13), and the second locking inclined surface (11) and the second control inclined surface (16) are aligned at the same time; When the inclined surface push rod (20) slides toward the end away from the driving inclined surface (21); Under the push of the reset elastic member (18), the sliding rod (9) slides toward the lower section; the first locking inclined surface (10) pushes the first control inclined surface (13), the first locking inclined surface (10) and the first control inclined surface (13) are in contact and staggered relation, the first locking block (12) slides in a direction away from the first locking hole (22), and the first pin rod portion (14) retracts into the first locking hole (22); the second locking inclined surface (11) and the second control inclined surface (16) are in contact and aligned relation, the second locking elastic member (25) pushes the second locking block (15) to slide toward the second locking hole (24), and the second pin rod portion (17) extends from the second locking hole (24) to the outside; When the inclined surface push rod (20) slides toward the end close to the driving inclined surface (21); When the inclined push rod (20) pushes the driving inclined surface (21), the sliding rod (9) slides toward the upper section; the second locking inclined surface (11) pushes the second control inclined surface (16) to contact and align, the second locking inclined surface (11) pushes the second control inclined surface (16) to contact and stagger, the second locking block (15) slides in a direction away from the second locking hole (24), and the second pin rod portion (17) retracts into the second locking hole (24); the first locking inclined surface (10) contacts and aligns with the first control inclined surface (13), the first locking elastic member (23) pushes the first locking block (12) to slide toward the first locking hole (22), and the first pin rod portion (14) extends from the first locking hole (22) to the outside; The slide block (2) is provided with an outer hole (3) adapted to the first pin portion (14) or the second pin portion (17).

5. The retractable and deployable wheel-leg structure according to claim 4, characterized in that: The side wall of the sliding rod (9) is provided with a first control groove (26), and one side of the groove bottom of the first control groove (26) is provided with the first locking inclined surface (10).

6. The retractable and deployable wheel-leg structure according to claim 4, characterized in that: The side wall of the sliding rod (9) is provided with a second control groove (27), and one side of the groove bottom of the second control groove (27) is provided with the second locking inclined surface (11).

7. The retractable and deployable wheel-leg structure according to claim 4, characterized in that: The sliding rod (9) is provided with a third control groove (28) corresponding to the control window (19), and the driving inclined surface (21) is provided on one side of the groove bottom of the third control groove (28).

8. The retractable and deployable wheel-leg structure according to claim 4, characterized in that: The two ends of the sliding block (2) are respectively provided with oblique guide openings (4) corresponding to the first pin rod portion (14) and the second pin rod portion (17).

9. The retractable and deployable wheel-leg structure according to claim 1, characterized in that: The sliding block (2) is provided with a through hole, and the guide rail (1) is slidably arranged through the through hole.

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