Pullback device assembly for rowing machine

Abstract

The utility model discloses a pullback device assembly for a rowing machine, which belongs to the technical field of rowing machines, and comprises a volute spiral spring, a belt, an accommodating box and a shell, the shell is integrally provided with a belt winding groove and an inner cylinder, the belt winding groove is used for accommodating the belt to be wound inside the belt winding groove, and the inner cylinder is rotatably connected with the accommodating box. The inner end and the outer end of the volute spiral spring are connected with the inner barrel and the containing box respectively, the winding direction of the belt is opposite to the winding direction of the volute spiral spring, the containing box is fixedly connected with a water tank of the rowing machine, and a safety baffle is integrally formed on the periphery, surrounding the containing box, of the shell and used for surrounding to form a spring containing groove embedded with the containing box. When the inner cylinder and the containing box rotate relatively, the volute spiral spring generates bending elastic deformation. According to the pullback device assembly for the rowing machine, the shell forms a safety baffle structure arranged outside the containing box in a sleeving mode, so that the shell and the containing box form multi-layer protection on the volute spiral spring, and the safety of a product is high.

Description

Technical Field

[0001] This utility model relates to the field of rowing machine technology, specifically to a rowing machine pullback assembly. Background Technology

[0002] A rowing machine is a full-body aerobic training device that simulates rowing on water. The main structure of a rowing machine includes a return mechanism. Its core principle is to use a mechanical structure or elastic element to reset the paddles in the water tank, and to keep the user's seat back to its original position along the slide rail by maintaining a grip on the belt. The elastic element can be a spiral spring.

[0003] The method used to store energy in a spiral spring is for the athlete to pull the belt wound on the puller with both hands to unwind it. This causes the spiral spring to be pulled by the belt, causing its inner and outer ends to twist relative to each other, thus storing energy in the spiral spring.

[0004] However, existing pullback devices require the belt tension to be indirectly transmitted to the spiral spring through multiple independent components. This causes the spiral spring to wear out easily over long-term use. When the spiral spring is no longer rigidly connected to the transmission structure, it can easily detach from the pullback device, posing a safety hazard to the athlete.

[0005] To address the aforementioned issues, a technical solution for a rowing machine pullback assembly is proposed. Utility Model Content

[0006] The purpose of this utility model is to solve the problems in the prior art by proposing a pullback assembly for rowing machines.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a rowing machine pull-back assembly, comprising a spiral spring, a belt, a receiving box, and a housing. The housing is integrally formed with a winding groove for accommodating the belt wound inside, and an inner cylinder rotatably connected to the receiving box. The inner end of the belt is fixedly connected to the housing. The inner and outer ends of the spiral spring are respectively connected to the inner cylinder and the receiving box. The winding direction of the belt is opposite to the winding direction of the spiral spring. The receiving box is fixedly connected to the water tank of the rowing machine. The housing is integrally formed with a safety baffle around the periphery of the receiving box to form a spring groove that fits into the receiving box.

[0008] When the inner cylinder rotates relative to the container, the spiral spring undergoes bending elastic deformation.

[0009] The present invention is further configured such that: the cross-section of the safety baffle is L-shaped, and the opening of the spring groove faces the water tank.

[0010] The present invention is further configured to include a main shaft, the housing being sleeved on the main shaft, a sleeve fixedly connected to the housing being provided between the housing and the main shaft, a one-way bearing being sleeved on the main shaft, and the two end faces of the one-way bearing being fixedly connected to the main shaft and the sleeve, respectively.

[0011] When the outer end of the belt is pulled away from the main shaft, the housing rotates synchronously with the main shaft.

[0012] The present invention is further configured such that: the receiving box has an integrally formed card interface, the inner cylinder has an integrally formed embedded part on its periphery, and the inner end and outer end of the spiral spring are respectively hook-shaped and engaged with the embedded part and the card interface.

[0013] The present invention is further configured such that: two partition plates are provided inside the receiving box, the two partition plates are respectively attached to both sides of the spiral spring and are in contact with the inner surface of the receiving box, the cross-section of the partition plates is smaller than the cross-section of the internal space of the receiving box in the same plane, and the cross-section of both is circular.

[0014] The present invention is further configured such that: the housing has an integrally formed inner groove at the bottom of the winding groove, and the inner groove has through holes at both ends along the axis of the main shaft; the inner end of the belt is a ring structure embedded in the inner groove, and is positioned on the housing by a limiting rod that passes through the two through holes in sequence.

[0015] The present invention is further configured to include a shaft retaining ring and a spring washer. The sleeve and the receiving box are in contact with the main shaft through rolling bearings. A circular groove is formed on the circumference of one end of the main shaft. The shaft retaining ring is engaged in the circular groove. The two ends of the spring washer abut against the shaft retaining ring and the rolling bearing, respectively.

[0016] The present invention is further configured such that: the receiving box comprises a box body and a box cover fixedly connected by several bolts, and the several bolts are evenly arranged around the axis of the main shaft.

[0017] In summary, this utility model has the following beneficial effects: by making the shell form a safety baffle structure that is sleeved outside the receiving box, the shell and the receiving box form a multi-layer protection for the spiral spring, thus making the product safer. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the shell of this utility model. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of the shell of this utility model. Figure 2 ;

[0020] Figure 3This is a schematic diagram of the structure of the housing and the spiral spring of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the main shaft, one-way bearing, rolling bearing, shaft retaining ring, and spring washer of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0023] Figure 6 This is an exploded view of the structure of this utility model;

[0024] Figure 7 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0025] Figure 8 This is a cross-sectional view of the present invention.

[0026] In the diagram: 1. Box body; 101. Snap-fit ​​interface; 2. Main shaft; 3. Divider plate; 4. Scroll spring; 5. Box cover; 6. Housing; 601. Belt winding groove; 602. Inner groove; 603. Spring groove; 604. Inner cylinder; 605. Embedded part; 606. Safety baffle; 7. Belt; 8. One-way bearing; 9. Rolling bearing; 10. Sleeve; 11. Spring washer; 12. Shaft retaining ring; 13. Limiting rod. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] Rowing machine pullback assembly, such as Figures 1 to 8 As shown, it includes a spiral spring 4, a belt 7, a housing 6, and a receiving box. The housing 6 is sleeved on the main shaft 2. The lower end of the main shaft 2 can be fixed coaxially with the paddle blade by a shaft pin. When the main shaft 2 can rotate, it can drive the paddle blade that extends into the water tank of the rowing machine to stir the water inside.

[0029] In this embodiment, the upper periphery of the housing 6 is integrally formed with a winding groove 601 for accommodating the belt 7 wound inside it, and the lower periphery of the housing 6 is integrally formed with an inner cylinder 604 rotatably connected to the receiving box. The inner end of the belt 7 is fixedly connected to the housing 6. Specifically, the housing 6 is integrally formed with an inner groove 602 at the bottom of the winding groove 601. The inner groove 602 has through holes at both ends along the axis of the main shaft 2. The inner end of the belt 7 is a ring structure embedded in the inner groove 602 and is positioned on the housing 6 by a limiting rod 13 that passes through the two through holes in sequence.

[0030] The inner and outer ends of the spiral spring 4 are connected to the inner cylinder 604 and the receiving box, respectively. Specifically, the receiving box has an integrally formed snap-fit ​​interface 101, and the inner cylinder 604 has an integrally formed inner part 605 on its periphery. The inner and outer ends of the spiral spring 4 are hook-shaped and snap-fitted into the inner part 605 and the snap-fit ​​interface 101, respectively. In order to facilitate the installation of the spiral spring 4 in the receiving box, the receiving box consists of a box body 1 and a box cover 5, which are fixedly connected by several bolts. The bolts are evenly arranged around the axis of the main shaft 2.

[0031] To ensure that the spiral spring 4 can undergo bending elastic deformation when the inner cylinder 604 rotates relative to the receiving box, the winding direction of the belt 7 is opposite to that of the spiral spring 4. The receiving box and the water tank of the rowing machine are fixedly connected by several screws evenly surrounding the main shaft 2. At this time, the spiral spring 4 is protected by the receiving box. To further improve the safety of the product during use, a safety baffle 606 is integrally formed around the periphery of the receiving box to form a spring groove 603 that fits into the receiving box. Considering the lightweight design of the product, the cross-section of the safety baffle 606 is L-shaped, and the opening of the spring groove 603 faces the water tank. That is, by forming a safety baffle 606 structure that is sleeved on the outside of the receiving box, the housing 6 and the receiving box form a multi-layer protection for the spiral spring 4, making the product safer.

[0032] like Figures 4 to 8 As shown, in order to enable the belt 7, which is being pulled away from the main shaft 2, to be reset by the traction of the spiral spring 4, and at the same time to prevent the blade from rotating again during the reset, a sleeve 10 is provided between the housing 6 and the main shaft 2 and is fixedly connected to the housing 6. A one-way bearing 8 is sleeved on the main shaft 2. The two end faces of the one-way bearing 8 are fixedly connected to the main shaft 2 and the sleeve 10 respectively. That is, when the outer end of the belt 7 is pulled away from the main shaft 2, the housing 6 and the main shaft 2 rotate synchronously due to the action of the one-way bearing 8, which drives the blade to rotate in the water. At this time, the spiral spring 4 stores energy.

[0033] When the traction on the belt 7 is released, the main shaft 2 does not rotate synchronously with the housing 6. At this time, the blades are stationary, while the housing 6 rotates. The belt 7 is then rewound due to the rotational traction of the housing 6.

[0034] To minimize vibration and noise caused by the elastic deformation of the spiral spring 4, two partition plates 3 are installed inside the container. The two partition plates 3 are respectively attached to both sides of the spiral spring 4 and are in contact with the inner surface of the container. The cross-section of the partition plates 3 is smaller than the cross-section of the internal space of the container in the same plane. Both of them are circular, that is, when the spiral spring 4 deforms, the side edge can push the partition plates 3 to roll along the container.

[0035] like Figure 8 As shown, considering the convenience of production on the assembly line, it also includes a shaft retaining ring 12 and a spring washer 11. The sleeve 10 and the receiving box are in contact with the main shaft 2 through the rolling bearing 9. A circular groove is formed on the circumference of one end of the main shaft 2. The shaft retaining ring 12 is snapped into the circular groove. The two ends of the spring washer 11 abut against the shaft retaining ring 12 and the rolling bearing 9 respectively. That is, the shaft retaining ring 12 and the spring washer 11 can keep the relevant structure sleeved on the main shaft 2 on the main shaft 2.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A rowing machine pullback assembly, characterized in that: The system includes a spiral spring (4), a belt (7), a receiving box, and a housing (6). The housing (6) is integrally formed with a winding groove (601) for receiving the belt (7) wound inside, and an inner cylinder (604) rotatably connected to the receiving box. The inner end of the belt (7) is fixedly connected to the housing (6). The inner end and outer end of the spiral spring (4) are respectively connected to the inner cylinder (604) and the receiving box. The winding direction of the belt (7) is opposite to the winding direction of the spiral spring (4). The receiving box is fixedly connected to the water tank of the rowing machine. The housing (6) is integrally formed with a safety baffle (606) around the periphery of the receiving box to form a spring groove (603) that fits into the receiving box. When the inner cylinder (604) rotates relative to the container, the spiral spring (4) undergoes bending elastic deformation.

2. The rowing machine pullback assembly according to claim 1, characterized in that: The safety baffle (606) has an L-shaped cross-section, and the opening of the spring groove (603) faces the water tank.

3. The rowing machine pullback assembly according to claim 1, characterized in that: It also includes a main shaft (2), the housing (6) is sleeved on the main shaft (2), a sleeve (10) fixedly connected to the housing (6) is provided between the housing (6) and the main shaft (2), a one-way bearing (8) is sleeved on the main shaft (2), and the two end faces of the one-way bearing (8) are fixedly connected to the main shaft (2) and the sleeve (10) respectively. When the outer end of the belt (7) is pulled away from the main shaft (2), the housing (6) rotates synchronously with the main shaft (2).

4. The rowing machine pullback assembly according to claim 3, characterized in that: The receiving box has an integrally formed card interface (101), and the inner cylinder (604) has an integrally formed inner part (605) on its periphery. The inner end and outer end of the spiral spring (4) are respectively hook-shaped and engaged with the inner part (605) and the card interface (101).

5. The rowing machine pullback assembly according to claim 1, characterized in that: The container is provided with two partition plates (3) inside. The two partition plates (3) are respectively attached to both sides of the spiral spring (4) and are in contact with the inner surface of the container. The cross-section of the partition plate (3) is smaller than the cross-section of the internal space of the container in the same plane. Both of them are circular.

6. The rowing machine pullback assembly according to claim 3, characterized in that: The housing (6) has an integrally formed inner groove (602) at the bottom of the winding groove (601). Both ends of the inner groove (602) along the axis of the main shaft (2) are provided with through holes. The inner end of the belt (7) is a ring structure embedded in the inner groove (602) and is positioned on the housing (6) by a limiting rod (13) that passes through the two through holes in sequence.

7. The rowing machine pullback assembly according to claim 3, characterized in that: It also includes a shaft retaining ring (12) and a spring washer (11). The sleeve (10) and the receiving box are in contact with the main shaft (2) through the rolling bearing (9). A circular groove is formed on the circumference of one end of the main shaft (2). The shaft retaining ring (12) is engaged in the circular groove. The two ends of the spring washer (11) abut against the shaft retaining ring (12) and the rolling bearing (9) respectively.

8. The rowing machine pullback assembly according to claim 3, characterized in that: The container box comprises a box body (1) and a box cover (5) that are fixedly connected by several bolts, and the bolts are evenly arranged around the axis of the main shaft (2).

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