Rowing machine cushion installation structure and pull pin assembly

Abstract

The utility model relates to the technical field of fitness equipment, in particular to a rowing machine cushion installation structure and a pull pin assembly. The pull pin assembly is used in cooperation with the insertion hole and comprises a hollow base and a movable plug pin which moves in the axial direction and is arranged in the hollow base in the circumferential direction in a rotatable mode, and the hollow base is provided with an axial hole penetrating in the axial direction, a first radial groove and a second radial groove, wherein the first radial groove and the second radial groove are located in different axial positions of the hollow base respectively and axially extend to an opening in the outer side of the axial hole. A limiting rod is arranged on the movable bolt in the radial direction, when the limiting rod is clamped in the second radial groove, the movable bolt leaves the inserting hole to enable the cushion to be in an unlocked state, the movable bolt is kept in the locked state through the first radial groove, and the movable bolt is kept in the unlocked state through the second radial groove; and the pull pin assembly in the unlocking state does not influence the reciprocating walking of the cushion.

Description

Technical Field

[0001] This utility model relates to the field of fitness equipment technology, specifically to a rowing machine seat installation structure and pull pin assembly. Background Technology

[0002] A rowing machine is a type of exercise equipment that simulates rowing on water, used for physical training. A rowing machine consists of a rail frame and a seat mounted on the rail frame. The seat is movably mounted to the rail frame via rollers on its running frame. Users need to sit on the seat and move back and forth when using the rowing machine. Most existing rowing machine seats lack a locking mechanism to keep the seat in a fixed position on the rail frame. Some rowing machines use spring-loaded pins on the running frame and spaced holes on the rail frame to engage with these pins, achieving locking through the engagement of the pins and holes. However, with these types of rowing machines, the pins cannot remain in an unlocked state away from the holes when the seat needs to move back and forth for training, making the back-and-forth movement inconvenient. Utility Model Content

[0003] One of the purposes of this utility model is to provide a pull pin assembly that can maintain a locked state or an unlocked state and easily switch between the two states.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a pull pin assembly, including a hollow seat and a movable pin that is axially movable and circumferentially rotatable within the hollow seat. The hollow seat has an axially penetrating axial hole and a first radial groove and a second radial groove located at different axial positions in the hollow seat and extending axially to the outer opening of the axial hole. A limit rod is radially provided on the movable pin. When the limit rod is engaged in the first radial groove, the seat cushion is in a locked state. When the limit rod is engaged in the second radial groove, the seat cushion is in an unlocked state.

[0005] Preferably, the angle between the orthogonal projections of the first radial groove and the second radial groove along the axial direction of the hollow seat is 30° to 90°.

[0006] Preferably, there are two symmetrically arranged first radial grooves and two symmetrically arranged second radial grooves.

[0007] Preferably, the first radial groove and the second radial groove are U-shaped with a round bottom.

[0008] Preferably, the movable pin is a spring pin, which includes a pin rod and a reset member. The reset member is sleeved on the pin rod and acts on the pin rod to displace it outward toward the axial hole.

[0009] Preferably, the pin rod has a stepped shaft structure, and a limiting retaining ring is provided at the position of the axial hole near the first radial groove. One end of the compression spring abuts against the stepped surface of the pin rod, and the other end abuts against the limiting retaining ring.

[0010] Preferably, the movable pin is a pin rod, and magnetic attraction components are respectively provided between the limiting rod and the bottom of the first radial groove and between the limiting rod and the bottom of the second radial groove for magnetic attraction.

[0011] The second objective of this utility model is to provide a rowing machine seat installation structure that can keep the rowing machine seat in a locked or unlocked state and facilitate switching between the two states.

[0012] To achieve the above objectives, the technical solution adopted by this utility model is: a rowing machine seat mounting structure for mounting a seat on a rowing machine slide rail frame. The seat mounting structure includes a seat travel frame fixedly mounted on the bottom of the seat, a travel mechanism disposed on the seat travel frame for cooperating with the slide rail frame to restrict the movement direction of the seat, and the aforementioned pull pin assembly. The hollow seat is fixedly mounted on the seat travel frame, and the slide rail frame is provided with insertion holes spaced apart to engage with the movable pin.

[0013] Preferably, the walking mechanism includes a long roller assembly disposed on the upper part of the seat cushion walking frame and a short roller assembly disposed on the lower part of the seat cushion walking frame, wherein the long roller assembly and the short roller assembly tactilely clamp the slide rail of the slide rail frame.

[0014] Preferably, the walking mechanism includes multiple wheel sets arranged side by side on the seat cushion walking frame, and the slide rail frame is provided with a slide groove extending in a straight line in the front-back direction, and the wheel sets are adapted to be embedded in the slide groove and roll in cooperation with the slide groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This utility model pull pin assembly includes a hollow seat and a movable pin that is axially movable and circumferentially rotatable within the hollow seat. A limit rod is radially provided on the movable pin. The hollow seat has a first radial groove and a second radial groove. When specifically applied to the seat mounting structure of a rowing machine, it is used in conjunction with the insertion holes on the slide rail frame. When the limit rod is engaged in the first radial groove, the movable pin is inserted into the spaced insertion holes on the slide rail frame, thus locking the seat. When the limit rod is engaged in the second radial groove, the movable pin disengages from the insertion hole, thus unlocking the seat. The first radial groove keeps the movable pin in the locked state, and the second radial groove keeps the movable pin in the unlocked state. The pull pin assembly in the unlocked state does not affect the reciprocating movement of the seat. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the seat cushion locking mechanism of this utility model.

[0018] Figure 2 This is a schematic diagram of the seat cushion locking mechanism of this utility model.

[0019] Figure 3 This is a schematic diagram of the hollow seat structure of this utility model.

[0020] Figure 4 This is one of the schematic diagrams of the seat cushion installation structure of this utility model.

[0021] Figure 5 This is the second schematic diagram of the installation structure of the seat cushion of this utility model.

[0022] The markings in the diagram are as follows: 100, seat cushion; 101, seat cushion running frame; 1021, long roller assembly; 1022, short roller assembly; 1023, wheel set; 200, slide rail frame; 201, insertion hole; 202, slide groove; 10, hollow seat; 11, first radial groove; 12, second radial groove; 13, axial hole; 14, limiting retaining ring; 21, pin rod; 22, compression spring; 23, limiting rod. Detailed Implementation

[0023] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation. Example 1

[0024] like Figures 1-3 As shown, this embodiment provides a pull pin assembly for use with a socket. The pull pin assembly includes a hollow base 10 fixedly installed on a carrier and a movable pin that is axially movable and circumferentially rotatable within the hollow base 10.

[0025] In this embodiment, the hollow seat 10 is fixed to the carrier by welding. When the pull pin assembly is applied to the rowing machine seat mounting structure, the carrier is the seat walking frame 101. The hollow seat 10 has an axially penetrating axial hole 13 and a first radial groove 11 and a second radial groove 12 located at different axial positions of the hollow seat 10 and extending axially to the outer opening of the axial hole 13. The axial length of the second radial groove 12 is less than the axial length of the first radial groove 11. There are two symmetrically arranged first radial grooves 11 and two symmetrically arranged second radial grooves 12. The first radial groove 11 and the second radial groove 12 are U-shaped with a round bottom. The orthographic angle between the first radial groove 11 and the second radial groove 12 along the axial direction of the hollow seat 10 is 30° to 90°. Specifically, in this embodiment, the orthographic angle between the two is 90°.

[0026] In this embodiment, the movable pin is a spring-loaded pin, which includes a pin rod 21 and a compression spring 22. A limit rod 23 is radially provided on the pin rod 21. The compression spring sleeve 22 is outside the pin rod 21 and acts on the pin rod 21 to displace it outward toward the axial hole 13. The pin rod 21 has a stepped shaft structure. A limit retaining ring 14 is provided at the position of the axial hole 13 near the first radial groove 11. One end of the compression spring 22 abuts against the stepped surface of the pin rod 21, and the other end abuts against the limit retaining ring. Pulling out the pin 21 overcomes the spring force of the compression spring 22, causing the compression spring 22 to compress and the insertion end of the pin 21 to move into the axial hole 13. Then, the limiting rod 23 is used to lock in the second radial groove 12 to keep the cushion 100 in the unlocked state. Releasing the pin 21 causes the insertion end of the pin 21 to move outward from the axial hole 13 due to the return action of the compression spring 22. Then, the limiting rod 23 is used to lock in the first radial groove 11 to keep the cushion 100 in the locked state.

[0027] The compression spring 22 serves to reset the pin 21 so that it extends outward toward the axial hole 13. In other examples, a reset component such as a rubber sleeve that can achieve the reset function can also be used.

[0028] The installation structure between the limiting rod 23 and the pin rod 21 can be as follows: a threaded through hole is provided radially through the pin rod 21, and the end of the limiting rod 23 has an external thread that matches the threaded through hole. The limiting rod 23 is threadedly engaged in the threaded through hole.

[0029] To facilitate operation of the pin 21, an operating head is fixedly mounted on the operating end of the pin 21 opposite to its insertion end. By operating the operating head, the pin 21 can be driven to move axially inside the axial hole 13, thereby enabling the limiting rod 23 to switch between the first radial groove 11 and the second radial groove 12. During the switching process between the first radial groove 11 and the second radial groove 12, axial displacement must be performed first, followed by rotation of the pin 21. The pin 21 is rotatably disposed in the axial hole 13.

[0030] It should be noted that the movable pin can also maintain the locked and unlocked states in the following manner: the movable pin is a pin rod 21, and a limiting rod 23 is radially provided on the pin rod 21. Magnetic attraction components are respectively provided between the limiting rod 23 and the bottom of the first radial groove 11 and between the limiting rod 23 and the bottom of the second radial groove 12. Specifically, the limiting rod 23 is covered with sheet metal, and magnetic blocks are fixedly provided at the bottom of both the first radial groove 11 and the bottom of the second radial groove 12. The sheet metal and the magnetic blocks together form a magnetic attraction component. When the limiting rod 23 is magnetically engaged in the first radial groove 11, the cushion 100 is in a locked state, and when the limiting rod 23 is magnetically engaged in the second radial groove 12, the cushion 100 is in an unlocked state. Example 2

[0031] like Figure 4 As shown, this embodiment provides a rowing machine seat mounting structure for mounting a seat 100 on a rowing machine slide rail 200. The seat mounting structure includes a seat travel frame 101 fixedly mounted on the bottom of the seat 100, a travel mechanism disposed on the seat travel frame 101 for cooperating with the slide rail 200 to limit the movement direction of the seat 100, and a pull pin assembly disposed on the seat travel frame 101 for keeping the seat 100 fixed or movable on the slide rail 200.

[0032] In this embodiment, the pull pin assembly includes a hollow seat 10 fixedly mounted on the seat cushion walking frame 101 and a movable pin that is axially movable and circumferentially rotatable within the hollow seat 10.

[0033] The hollow seat 10 is fixed to the seat cushion walking frame 101 by welding. The hollow seat 10 has an axial hole 13 that passes through it and a first radial groove 11 and a second radial groove 12 that are located at different axial positions of the hollow seat 10 and extend axially to the outside of the axial hole 13. The axial length of the second radial groove 12 is less than the axial length of the first radial groove 11. There are two symmetrically arranged first radial grooves 11 and two symmetrically arranged second radial grooves 12. The first radial groove 11 and the second radial groove 12 are U-shaped with round bottoms. The included angle between the orthographic projection of the first radial groove 11 and the second radial groove 12 along the axial direction of the hollow seat 10 is 90°.

[0034] The movable pin is a spring-loaded pin, comprising a pin rod 21 and a compression spring 22. A limit rod 23 is radially provided on the pin rod 21. The compression spring sleeve 22 is outside the pin rod 21 and acts on the pin rod 21 to displace it outward toward the axial hole 13. The pin rod 21 has a stepped shaft structure. A limiting retaining ring 14 is provided at a position in the axial hole 13 near the first radial groove 11. One end of the compression spring 22 abuts against the stepped surface of the pin rod 21, and the other end abuts against the limiting retaining ring 14. Pulling out the pin 21 overcomes the elastic force of the compression spring 22, causing the compression spring 22 to compress and the insertion end of the pin 21 to move into the axial hole 13. Then, the limiting rod 23 is used to lock the cushion 100 in the second radial groove 12, keeping the cushion 100 in the unlocked state. Releasing the pin 21 causes the insertion end of the pin 21 to move outward from the axial hole 13 due to the return action of the compression spring 22. Then, the limiting rod 23 is used to lock the cushion 100 in the first radial groove 11, keeping the cushion 100 in the locked state.

[0035] To facilitate operation of the pin 21, an operating head is fixedly mounted on the operating end of the pin 21 opposite to its insertion end. By operating the operating head, the pin 21 can be driven to move axially inside the axial hole 13, thereby enabling the limiting rod 23 to switch between the first radial groove 11 and the second radial groove 12. During the switching process between the first radial groove 11 and the second radial groove 12, axial displacement must be performed first, followed by rotation of the pin 21. The pin 21 is rotatably disposed in the axial hole 13.

[0036] The slide rail frame 200 has interlocking holes 201 that engage with the movable pin. When the limiting rod 23 is engaged in the first radial groove 11, the movable pin is engaged in the interlocking holes 201 on the slide rail frame 200, thus locking the cushion 100. When the limiting rod 23 is engaged in the second radial groove 12, the movable pin leaves the interlocking hole 201, thus unlocking the cushion 100.

[0037] In this embodiment, the walking mechanism includes a long roller assembly 1021 disposed on the upper part of the seat cushion walking frame 101 and a short roller assembly 1022 disposed on the lower part of the seat cushion walking frame 101. The long roller assembly 1021 and the short roller assembly 1022 roll and clamp the slide rail of the slide rail frame 200, such as... Figure 4 As shown. Alternatively, in some other examples, the walking mechanism may also be constructed as follows: the walking mechanism includes multiple wheel sets 1023 arranged side-by-side on the seat cushion walking frame 101, the slide rail frame 200 is provided with a linearly extending groove 202 in the front-to-back direction, and the wheel sets 1023 are adapted to be embedded in the groove 202 and roll in cooperation with the groove 202, such as... Figure 5 As shown.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this invention. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications may be made to this invention without departing from its spirit and scope. All such changes and modifications fall within the scope of this invention as defined by the appended claims and their equivalents.

Claims

1. A pull pin assembly, characterized in that: The pull pin assembly includes a hollow seat and a movable pin that is axially movable and circumferentially rotatable within the hollow seat. The hollow seat has an axially penetrating axial hole and a first radial groove and a second radial groove located at different axial positions in the hollow seat and extending axially to the outer opening of the axial hole. A limit rod is radially provided on the movable pin. When the limit rod is engaged in the first radial groove, the seat is in a locked state. When the limit rod is engaged in the second radial groove, the seat is in an unlocked state.

2. The pull pin assembly according to claim 1, characterized in that: The angle between the orthogonal projections of the first radial groove and the second radial groove along the axial direction of the hollow seat is 30° to 90°.

3. The pull pin assembly according to claim 1, characterized in that: There are two symmetrically arranged first radial grooves and two symmetrically arranged second radial grooves.

4. The pull pin assembly according to claim 1, characterized in that: The first radial groove and the second radial groove are U-shaped with round bottoms.

5. The pull pin assembly according to any one of claims 1 to 4, characterized in that: The movable pin is a spring pin, which includes a pin rod and a reset member. The reset member is sleeved on the pin rod and acts on the pin rod to displace it outward toward the axial hole.

6. The pull pin assembly according to claim 5, characterized in that: The pin rod has a stepped shaft structure, and a limiting ring is provided at the position of the axial hole near the first radial groove. One end of the reset member abuts against the stepped surface of the pin rod, and the other end abuts against the limiting ring.

7. The pull pin assembly according to any one of claims 1 to 4, characterized in that: The movable pin is a pin rod, and magnetic attraction components are respectively provided between the limiting rod and the bottom of the first radial groove and between the limiting rod and the bottom of the second radial groove.

8. A rowing machine seat mounting structure for mounting a seat on a rowing machine's slide rail, characterized in that: The seat cushion mounting structure includes a seat cushion traveling frame fixedly installed at the bottom of the seat cushion, a traveling mechanism provided on the seat cushion traveling frame for cooperating with a slide rail frame to limit the direction of movement of the seat cushion, and a pull pin assembly as described in any one of claims 1 to 7. The hollow seat is fixedly installed on the seat cushion traveling frame, and the slide rail frame is provided with insertion holes spaced apart to engage with the movable pin.

9. The rowing machine seat mounting structure according to claim 8, characterized in that: The walking mechanism includes a long roller assembly disposed on the upper part of the seat cushion walking frame and a short roller assembly disposed on the lower part of the seat cushion walking frame, wherein the long roller assembly and the short roller assembly roll to clamp the slide rail of the slide rail frame.

10. The rowing machine seat mounting structure according to claim 8, characterized in that: The walking mechanism includes multiple wheel sets arranged side by side on the seat cushion walking frame. The slide rail frame is provided with a slide groove extending in a straight line in the front-back direction. The wheel sets are adapted to be embedded in the slide groove and roll in cooperation with the slide groove.

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