Ice and dry-land sleds

Abstract

This dual-purpose ice and dryland sled features a gantry frame with bushings, connecting bolts, and frustum blocks as connecting structures. It can be fitted with rollers or skates, and its modular design allows for quick switching between skates and rollers. Users only need one set of equipment to meet the needs of both ice and dryland scenarios, significantly reducing equipment purchase costs and storage space requirements. It solves the pain point of traditional solutions requiring two sets of equipment and can be used in both winter and non-ice / snow seasons. Enthusiasts can enjoy recreational fitness year-round with just one set. The bushing-connecting bolt-frustum block combination structure, combined with the positioning bearing slot and limit ring plate design, ensures that changing skates or rollers is simple and quick, requiring only tightening or loosening bolts. It retains the operating habits and fun of traditional single-blade ice sleds while overcoming seasonal and venue limitations, helping to extend ice sports culture into the non-ice / snow season and promoting the diversification of national fitness activities.

Description

Technical Field

[0001] This utility model relates to the field of fitness and entertainment equipment technology, specifically a dual-purpose ice and dry-land trolley. Background Technology

[0002] Ice sports culture has a long history in northern my country, among which the single-blade ice sled (commonly known as the "one-legged donkey" in Northeast China) has long been favored by ice and snow enthusiasts due to its simple structure, flexible operation, and fun. However, the traditional single-blade ice sled has significant functional limitations—its bottom is only equipped with an ice blade structure, relying on the ice surface as a movement platform, which strictly limits its use to winter ice and snow environments and cannot meet the fitness needs of the non-ice and snow seasons.

[0003] To address this contradiction, in recent years, improved floor sled designs have emerged on the market that replace ice skates with single-row wheels. This design, by replacing the ice skates with land-based wheels, allows the sled to be used on non-ice surfaces, expanding the applicability of single-blade ice sleds to some extent. However, this requires enthusiasts to purchase at least two complete sets of equipment, increasing operating costs, reducing storage convenience, and failing to fundamentally solve the problem of equipment having limited functionality. Summary of the Invention

[0004] The purpose of this invention is to provide a sled that can be used on both ice and dry land, allowing for the switching between ice skates and rollers on the same sled, thus achieving efficient adaptation of the same sled to both ice and dry land scenarios and solving the problems in the prior art.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a dual-purpose ice and dryland sled, including a frame, a seat plate installed on the frame, a foot pedal installed on the upper part of one end of the frame, a first gantry frame that can rotate installed on the frame below the foot pedal, and a second gantry frame fixedly installed at the bottom of the other end of the frame. Both the first and second gantry frames have through holes on their upright plates, and bushings are fitted into the through holes. One end of the bushing has a folded edge with a diameter larger than the diameter of the through hole. The inner circumferential wall of the bushing has internal threads, and a connecting bolt is fitted into the bushing. A frustum block is also fitted onto the connecting bolt, and a threaded hole that mates with the connecting bolt is opened at the axial position of the frustum block. Rollers or ice skates are installed on the frustum block. The rollers are respectively installed between the uprights of the first and second portal frames. The folded edge of the bushing is located on the outside of the upright, and the threaded head of the connecting bolt contacts the folded edge. The threaded rod of the connecting bolt passes through the bushing and is installed on a frustum block. A positioning bearing is installed inside the roller, and the outer ring of the positioning bearing is fixedly connected to the roller. Slots that mate with the frustum blocks are opened on both sides of the inner ring of the positioning bearing. The positioning bearing is located between the two frustum blocks. Two rollers are installed on the second portal frame, each roller is installed on the outside of the upright. The folded edge of the bushing is located on the inside of the upright. A frustum block is located between the bushing and the threaded head of the connecting bolt. A positioning bearing is installed inside the roller, and the outer ring of the positioning bearing is fixedly connected to the roller. Slots that mate with the frustum blocks are opened on both sides of the inner ring of the positioning bearing. The slots on both sides are connected. A limiting ring plate is installed in the slot. The inner diameter of the limiting ring plate allows the threaded rod of the connecting bolt to pass through. The inner diameter of the limiting ring plate is smaller than the diameter of the threaded head of the connecting bolt. The positioning bearing is located between the frustum block and the threaded head of the connecting bolt. The ice skate is installed between the uprights of the first and second portal frames. The folded edge of the bushing is located on the outside of the upright, and the threaded head of the connecting bolt contacts the folded edge. The threaded rod of the connecting bolt passes through the bushing and installs a frustum block. Positioning grooves that mate with the frustum blocks are provided on both sides of the ice skate, and the ice skate is located between the two frustum blocks. A limiting block is provided on the outer periphery of the frustum block, and a first limiting groove that mates with the limiting block is provided on the inner ring of the positioning bearing. The first limiting groove communicates with the slot. A limiting block is provided on the outer periphery of the frustum block, and a second limiting groove that mates with the limiting block is provided on the ice skate. The second limiting groove communicates with the positioning groove. A vertical shaft is installed on the first portal frame. The end of the vertical shaft has a flange with a diameter larger than that of the vertical shaft. A mounting hole that mates with the flange is provided inside the beam frame. A detachable cover is provided at the bottom of the mounting hole, and a through hole that mates with the vertical shaft is provided inside the cover. A rotary bearing is installed on the outer periphery of the vertical shaft between the cover and the flange.The side of the vehicle frame is equipped with a locking mechanism that restricts the rotation of the first gantry frame. The locking mechanism includes a vertically arranged guide sleeve, within which a locking rod capable of vertical lifting and lowering is fitted. The first gantry frame has a locking hole that mates with the locking rod. A vertically arranged pull rod is also installed on the locking rod. A first guide groove mates with the pull rod is formed on one side of the upper end of the guide sleeve, and a second guide groove mates with the pull rod is formed on the other side of the upper end of the guide sleeve. The length of the second guide groove is greater than the length of the first guide groove. When the pull rod is in the first guide groove, the locking rod is separated from the locking hole; when the pull rod is in the second guide groove, the locking rod is in the locking hole. A first hinge seat is installed on the vehicle frame, and a second hinge seat is installed at the end of the vehicle frame away from the foot pedal. A support rod is installed on the first hinge seat, and a seat plate is installed at the end of the support rod away from the first hinge seat. Foot pedals are also provided on both sides of the support rod, and hydraulic dampers are installed between each foot pedal and the second hinge seat.

[0006] The positive effects of this utility model are as follows: The dual-purpose ice and dryland sled described herein features a connecting structure consisting of bushings, connecting bolts, and a frustum block mounted on the gantry frame of the sled's beam. This allows for the installation of rollers or skates, and the modular design enables quick switching between skates and rollers. Users only need one set of equipment to meet the needs of both ice and dryland scenarios, significantly reducing equipment purchase costs and storage space requirements. This solves the pain point of traditional solutions requiring two sets of equipment. It can be used in both winter and non-ice / snow seasons, allowing enthusiasts to enjoy recreational fitness year-round with just one set of equipment. The combined structure of bushings, connecting bolts, and frustum blocks, along with the slots for positioning bearings and the design of limiting ring plates, ensures that the replacement of skates or rollers is simple and quick, requiring only the tightening and loosening of bolts. It retains the operating habits and fun of traditional single-blade ice sleds while overcoming seasonal and venue limitations, helping to extend ice sports culture into non-ice / snow seasons and promoting the diversification of national fitness activities. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of the mounting roller of this utility model; Figure 2 This is a schematic diagram of the structure for installing ice skates according to this utility model; Figure 3 This is a schematic diagram of the structure of the second portal frame with two rollers installed in this utility model; Figure 4 yes Figure 1 The main view of the structure; Figure 5 yes Figure 4 The left view; Figure 6 yes Figure 4 An enlarged view of the sectional view along the AA direction; Figure 7 yes Figure 2The main view of the structure; Figure 8 yes Figure 7 An enlarged view of the BB-axis sectional view; Figure 9 yes Figure 3 The main view of the structure; Figure 10 yes Figure 9 An enlarged view of the sectional view along the CC direction; Figure 11 This is a sectional view of the vertical shaft installed inside the vehicle beam frame; Figure 12 This is a schematic diagram of the locking mechanism; Figure 13 This is a schematic diagram showing the locking lever in the locking hole. Figure 14 This is a schematic diagram showing the support leg on the vehicle frame rotating away from the ground. Detailed Implementation

[0008] The present invention describes a dual-purpose ice and dryland trolley, such as... Figure 1-6 As shown, it includes a beam frame 1, a seat plate 2 installed on the beam frame 1, and a foot pedal 3 installed on the upper part of one end of the beam frame 1. The seat plate 2 is used to provide a sitting position for the user, and the foot pedal 3 provides a place to put the feet. After the user sits on the trolley, he / she can hold the support rollers with both hands for sliding entertainment.

[0009] A first gantry frame 4, which can rotate, is installed on the frame 1 below the foot pedal 3. A second gantry frame 5 is fixedly installed at the bottom of the other end of the frame 1. Both the first gantry frame 4 and the second gantry frame 5 have through holes on their upright plates. A bushing 6 is installed in the through hole. One end of the bushing 6 has a folded edge 7, the diameter of which is larger than the diameter of the through hole, for positioning the bushing 6 in the through hole of the upright plate. The inner circumferential wall of the bushing 6 has internal threads. A connecting bolt 8 is installed in the bushing 6. A frustum block 9 is also installed on the connecting bolt 8. A threaded hole that mates with the connecting bolt 8 is opened at the axial position of the frustum block 9. A roller 10 or an ice skate 11 is installed on the frustum block 9.

[0010] By rotating the connecting bolt 8, the connecting bolt 8 can be disassembled and assembled from the bushing 6 and the frustum block 9 on the upright plate. When it is necessary to glide on the ice, the ice blade 11 can be installed on the frustum block 9. When it is necessary to glide on the ground, the ice blade 11 can be removed and replaced with the roller 10.

[0011] Among them, bushing 6, connecting bolt 8, and frustum block 9 are detachable connecting parts, and their connection with roller 10 can be as follows: Figure 6As shown, the rollers 10 are respectively installed between the upright plates of the first portal frame 4 and the second portal frame 5. That is, one roller 10 is installed in the first portal frame 4 and one roller 10 is installed in the second portal frame 5. The roller 10 in the first portal frame 4 can turn, making it more flexible.

[0012] The flange 7 of the bushing 6 is located on the outer side of the upright plate. The threaded head of the connecting bolt 8 contacts the flange 7. The threaded rod of the connecting bolt 8 passes through the bushing 6 and is installed on the frustum block 9. The frustum block 9 is located on the inner side of the upright plate. A positioning bearing 12 is installed inside the roller 10. The outer ring of the positioning bearing 12 is fixedly connected to the roller 10. The inner ring of the positioning bearing 12 has slots 13 on both sides that mate with the frustum block 9. The positioning bearing 12 is located between the two frustum blocks 9. When installing the above structure, first, the two frustum blocks 9 are fitted into the slots 13 of the positioning bearing 12 in the roller 10, and the connecting bolt 8 is connected to the bushing 6 so that the threaded rod of the connecting bolt 8 extends out of one end of the bushing 6. Then, the roller 10 with the two frustum blocks 9 is placed between the through holes of the two upright plates. The bushing 6 with the connecting bolt 8 is inserted into the through hole from the outside of the upright plate. The connecting bolt 8 is rotated to achieve a threaded fastening connection between the connecting bolt 8 and the frustum block 9, thereby achieving the positioning and installation of the roller 10.

[0013] The bushing 6, connecting bolt 8, and frustum block 9 are detachable connecting parts, and their connection to the ice skate 11 can be as follows: Figure 7 and Figure 8 As shown, the ice skate 11 is installed between the uprights of the first portal frame 4 and the second portal frame 5. The folded edge 7 of the bushing 6 is located on the outer side of the upright, and the screw head of the connecting bolt 8 contacts the folded edge 7. The threaded rod of the connecting bolt 8 passes through the bushing 6 and is fitted with a frustum 9, which is located on the inner side of the upright. Positioning grooves 15 are provided on both sides of the ice skate 11 to mate with the frustum 9, and the ice skate 11 is located between the two frustum 9.

[0014] When installing the above structure, firstly, the two frustum blocks 9 are fitted into the positioning groove 15 of the ice skate 11, and the connecting bolt 8 is connected to the bushing 6 so that the thread of the connecting bolt 8 extends out of one end of the bushing 6. Then, the ice skate 11 with four frustum blocks 9 is placed between the through holes of the upright plates on both sides of the first portal frame 4 and the second portal frame 5. The bushing 6 with the connecting bolt 8 is inserted into the through hole from the outside of the upright plate. The connecting bolt 8 is rotated to achieve the threaded fastening connection between the connecting bolt 8 and the frustum blocks 9, thereby realizing the positioning and installation of the ice skate 11.

[0015] The replacement of the ice skate 11 and roller 10 in the above structure is also easy to achieve. Simply rotate the connecting bolt 8 to separate it from the frustum block 9, and the ice skate 11 or roller 10 can be removed between the uprights. After replacement, align the frustum block 9 on the ice skate 11 or roller 10 with the through hole, and then re-tighten the connecting bolt 8.

[0016] Furthermore, to enhance the balance of dry-land gliding and adapt to different terrains, two rollers 10 can be installed on the second gantry frame 5, such as... Figure 9 and Figure 10 As shown, each roller 10 is installed on the outer side of the upright plate. The folded edge 7 of the bushing 6 is located on the inner side of the upright plate. The frustum block 9 is located between the bushing 6 and the threaded head of the connecting bolt 8. A positioning bearing 12 is installed inside each roller 10. The outer ring of the positioning bearing 12 is fixedly connected to the roller 10. Slots 13 that mate with the frustum block 9 are provided on both sides of the inner ring of the positioning bearing 12. The slots 13 on both sides are connected. A limiting ring plate 14 is installed inside the slot 13. The inner diameter of the limiting ring plate 14 allows the threaded rod of the connecting bolt 8 to pass through. The inner diameter of the limiting ring plate 14 is smaller than the diameter of the threaded head of the connecting bolt 8. The positioning bearing 12 is located between the frustum block 9 and the threaded head of the connecting bolt 8.

[0017] When installing the two rollers 10, first insert the bushing 6 into the through hole of the upright plate, so that the folded edge 7 is located on the inner side of the upright plate as a limit, and install a frustum block 9 into the slot 13 of the inner ring of the positioning bearing 12. Insert the connecting bolt 8 into the slot 13 where the frustum block 9 is not installed to connect the connecting bolt 8 with the frustum block 9. Then align the threaded hole of the bushing 6 and rotate the connecting bolt 8 to connect the connecting bolt 8 with the bushing 6, and press the threaded head of the connecting bolt 8 onto the limiting ring plate 14, thereby achieving the threaded tight positioning connection of the roller 10 on the outer side of the upright plate.

[0018] Whether one set of rollers 10 or two sets of rollers 10 are installed on the portal frame, the connection structure consists of bushing 6, connecting bolt 8 and frustum block 9. The only difference is the installation direction and position. No other connection structure needs to be replaced. One set of rollers 10 or two sets of rollers 10 can be disassembled and replaced. Moreover, the disassembly and assembly operation is easy to implement and can effectively improve the efficiency of disassembly and assembly.

[0019] Furthermore, to ensure the frustum block 9 is relatively fixed relative to the roller 10 or the ice skate 11, and to prevent the frustum block 9 from rotating and affecting disassembly and assembly when the connecting bolt 8 is rotated, a limiting block 16 can be provided on the outer periphery of the frustum block 9. A first limiting groove 17 that mates with the limiting block 16 is provided on the inner ring of the positioning bearing 12, and the first limiting groove 17 communicates with the slot 13. A second limiting groove 18 that mates with the limiting block 16 is provided on the ice skate 11, and the second limiting groove 18 communicates with the positioning slot 15. The cooperation of the limiting block 16 and the two limiting grooves also achieves dual circumferential and axial fixation after component installation, preventing loosening during gliding and ensuring safety during use.

[0020] Furthermore, in order for the first gantry 4 to rotate normally when the roller 10 is installed, such as... Figure 11 As shown, a vertical shaft 19 is mounted on the first portal frame 4. The end of the vertical shaft 19 has a flange 20, the diameter of which is larger than the diameter of the vertical shaft 19. A mounting hole 21, which mates with the flange 20, is provided inside the beam frame 1. A detachable cover 22 is provided at the bottom of the mounting hole 21. A through hole, which mates with the vertical shaft 19, is provided inside the cover 22. The lower end of the vertical shaft 19, extending through the through hole, is used to mount the first portal frame 4. A rotary bearing 23 is mounted on the outer periphery of the vertical shaft 19 between the cover 22 and the flange 20. This structure not only enables the rotational mounting of the first portal frame 4 but also provides a compact and stable structure, facilitating the disassembly and maintenance of the vertical shaft 19.

[0021] Furthermore, in order to rotate and lock the first gantry frame 4 during the installation of the ice skate 11 to prevent deformation of the ice skate 11, such as... Figure 12 and Figure 13 As shown, a locking mechanism that can restrict the rotation of the first portal frame 4 can be installed on the side of the beam frame 1.

[0022] The locking mechanism includes a vertically arranged guide sleeve 24, within which a vertically movable locking rod 25 is fitted. A locking hole 26, which mates with the locking rod 25, is provided on the first portal frame 4. A vertically arranged pull rod 27 is also installed on the locking rod 25. A first guide groove 28, which mates with the pull rod 27, is provided on one side of the upper end of the guide sleeve 24, and a second guide groove 29, which mates with the pull rod 27, is provided on the other side of the upper end of the guide sleeve 24. The length of the second guide groove 29 is greater than the length of the first guide groove 28. When the pull rod 27 is located within the first guide groove 28, the locking rod 25 is separated from the locking hole 26; when the pull rod 27 is located within the second guide groove 29, the locking rod 25 is located within the locking hole 26.

[0023] When the first gantry 4 needs to rotate, the pull rod 27 is located in the first guide groove 28, and the locking rod 25 is located on the upper side of the first gantry 4, allowing the first gantry 4 to rotate freely without restriction. When it is necessary to lock the first gantry 4, the pull rod 27 is grasped and moved out of the first guide groove 28, and then the locking rod 25 is rotated to rotate the pull rod 27 to the position of the second guide groove 29. Then, under the action of gravity, it falls down, and the locking rod 25 enters the locking hole 26, thereby locking the rotation of the first gantry 4.

[0024] The design of the above structure allows for adjustment of the steering flexibility of the scooter according to the needs of the venue. For example, when used on dry land, the first gantry 4 can be unlocked to allow the rollers 10 to steer flexibly. When on ice, the first gantry 4 needs to be locked to maintain the consistency of the skate blades 11, prevent deformation, and improve straight-line stability.

[0025] Furthermore, a first hinge seat 30 can be installed on the frame 1, and a second hinge seat 31 is installed at the end of the frame 1 away from the foot pedal 3. A support rod 32 is installed on the first hinge seat 30, and a seat plate 2 is installed at the end of the support rod 32 away from the first hinge seat 30. Foot pedals 33 are also provided on both sides of the support rod 32, and a hydraulic damper 34 is installed between each foot pedal 33 and the second hinge seat 31. The combination of the hydraulic damper 34 and the foot pedals 33 can effectively buffer vibrations during gliding and reduce fatigue during long-term use. The seat plate 2 is connected to the support rod 32 through the hinge seat, and the angle can be adjusted according to the user's height, improving operating comfort and optimizing the user experience.

[0026] The frame 1 can also be equipped with a rotatable support leg, similar to the single-sided support of a bicycle. When a roller 10 or an ice skate 11 is installed inside the gantry frame, the support leg rotates and contacts the ground, which can play a balancing role when the device is placed. When two sets of rollers 10 are installed on the gantry frame, the stability is higher and there is no need to install support legs.

[0027] When using the aforementioned ice and dry-land sled, the user can sit on the seat 2, place their feet on the foot pedals 3, and grip the support bars with both hands, ensuring the bottom of the support bars is in contact with the ground. The sled will then move forward using the reaction force between the support bars and the ground. Alternatively, both feet can be in contact with the ground, using the force to give the sled an initial forward velocity. During the ride, the feet can be placed back on the foot pedals 3, intermittently pushing off the ground to provide forward momentum. The sled can also be used on slopes using only the user's own weight.

[0028] The technical solution of this utility model is not limited to the scope of the embodiments described herein. All technical contents not described in detail herein are publicly known technologies.

Claims

1. An ice and land sledge, characterized in that: The device includes a frame (1), a seat plate (2) mounted on the frame (1), a foot pedal (3) mounted on the upper part of one end of the frame (1), a first gantry frame (4) that can rotate mounted on the frame (1) below the foot pedal (3), and a second gantry frame (5) fixedly mounted on the bottom of the other end of the frame (1). Both the first gantry frame (4) and the second gantry frame (5) have through holes on their upright plates. A bushing (6) is installed in the through hole. One end of the bushing (6) has a folded edge (7). The diameter of the folded edge (7) is larger than the diameter of the through hole. The inner circumferential wall of the bushing (6) has internal threads. A connecting bolt (8) is installed in the bushing (6). A frustum block (9) is also installed on the connecting bolt (8). A threaded hole that mates with the connecting bolt (8) is opened at the axial position of the frustum block (9). A roller (10) or an ice skate (11) is mounted on the frustum block (9).

2. The dual-purpose ice and dryland sled according to claim 1, characterized in that: The rollers (10) are respectively installed between the upright plates of the first gantry frame (4) and the second gantry frame (5). The folded edge (7) of the bushing (6) is located on the outside of the upright plate. The screw head of the connecting bolt (8) is in contact with the folded edge (7). The screw of the connecting bolt (8) passes through the bushing (6) and is installed on the frustum block (9). The roller (10) is equipped with a positioning bearing (12). The outer ring of the positioning bearing (12) is fixedly connected to the roller (10). The inner ring of the positioning bearing (12) has slots (13) on both sides that cooperate with the frustum block (9). The positioning bearing (12) is located between the two frustum blocks (9).

3. The dual-purpose ice and dryland sled according to claim 1, characterized in that: Two rollers (10) are installed on the second portal frame (5). Each roller (10) is installed on the outside of the upright plate. The folded edge (7) of the bushing (6) is located on the inside of the upright plate. The frustum block (9) is located between the bushing (6) and the screw head of the connecting bolt (8). A positioning bearing (12) is installed inside the roller (10). The outer ring of the positioning bearing (12) is fixedly connected to the roller (10). The inner ring of the positioning bearing (12) has slots (13) on both sides that cooperate with the frustum block (9). The slots (13) on both sides are connected. A limiting ring plate (14) is installed in the slot (13). The inner diameter of the limiting ring plate (14) allows the screw of the connecting bolt (8) to pass through. The inner diameter of the limiting ring plate (14) is smaller than the diameter of the screw head of the connecting bolt (8). The positioning bearing (12) is located between the frustum block (9) and the screw head of the connecting bolt (8).

4. The dual-purpose ice and dryland sled according to claim 1, characterized in that: The ice skate (11) is installed between the upright plates of the first portal frame (4) and the second portal frame (5). The folded edge (7) of the bushing (6) is located on the outside of the upright plate. The screw head of the connecting bolt (8) contacts the folded edge (7). The screw of the connecting bolt (8) passes through the bushing (6) and is installed on the frustum block (9). The ice skate (11) has positioning grooves (15) on both sides that cooperate with the frustum block (9). The ice skate (11) is located between the two frustum blocks (9).

5. The dual-purpose ice and dryland sled according to claim 2, characterized in that: The outer periphery of the frustum block (9) is provided with a limiting block (16), and the inner ring of the positioning bearing (12) is provided with a first limiting groove (17) that cooperates with the limiting block (16). The first limiting groove (17) is connected to the slot (13).

6. The dual-purpose ice and dryland sled according to claim 4, characterized in that: The outer periphery of the truncated cone block (9) is provided with a limiting block (16), and the ice blade (11) is provided with a second limiting groove (18) that cooperates with the limiting block (16). The second limiting groove (18) is connected to the positioning groove (15).

7. The dual-purpose ice and dryland sled according to claim 1, characterized in that: A vertical shaft (19) is installed on the first portal frame (4). The end of the vertical shaft (19) is provided with a flange (20). The diameter of the flange (20) is larger than the diameter of the vertical shaft (19). An installation hole (21) that matches the flange (20) is opened in the beam frame (1). A detachable cover (22) is provided at the bottom of the installation hole (21). A through hole that matches the vertical shaft (19) is opened in the cover (22). A rotary bearing (23) is installed on the outer periphery of the vertical shaft (19) between the cover (22) and the flange (20).

8. The dual-purpose ice and dryland sled according to claim 1, characterized in that: The side of the beam frame (1) is equipped with a locking mechanism that can restrict the rotation of the first gantry frame (4). The locking mechanism includes a vertically arranged guide sleeve (24). A locking rod (25) that can be vertically raised and lowered is installed in the guide sleeve (24). The first gantry frame (4) is provided with a locking hole (26) that cooperates with the locking rod (25). A vertically arranged pull rod (27) is also installed on the locking rod (25). A first guide groove (28) that cooperates with the pull rod (27) is provided on one side of the upper end of the guide sleeve (24). A second guide groove (29) that cooperates with the pull rod (27) is provided on the other side of the upper end of the guide sleeve (24). The length of the second guide groove (29) is greater than the length of the first guide groove (28). When the pull rod (27) is located in the first guide groove (28), the locking rod (25) is separated from the locking hole (26). When the pull rod (27) is located in the second guide groove (29), the locking rod (25) is located in the locking hole (26).

9. A dual-purpose ice and dryland sled according to claim 1, characterized in that: A first hinge seat (30) is installed on the beam frame (1). A second hinge seat (31) is installed at the end of the beam frame (1) away from the foot pedal (3). A support rod (32) is installed on the first hinge seat (30). A seat plate (2) is installed at the end of the support rod (32) away from the first hinge seat (30). Foot pedals (33) are also provided on both sides of the support rod (32). A hydraulic damper (34) is installed between each foot pedal (33) and the second hinge seat (31).

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