Quick-release pulley block and training device

Abstract

The utility model belongs to the field of body -building equipment technology especially relates to a quick release pulley block and training device. A quick release pulley block, include: fixed part, it is used for fixedly connected on training device, the fixed part is equipped with the installation slot along the first direction extension, the lateral opening lock hole is set up on the lateral wall of installation slot, movable part, it is detachably assembled in fixed part, movable part includes: pulley block, lock department, along the first direction and installation slot slidingly fits in, drive cavity, it is equipped with pressing lever and elastic part, and elastic part exerts the axial elasticity of outward movement to pressing lever, the avoidance slot is communicated with drive cavity and laterally through lock department, lock block, it is rotatably connected in avoidance slot, one end of lock block is transmission connection with pressing lever, when pressing lever is in natural state, the other end of lock block projects to the outside of avoidance slot and is matched with lock hole to limit the sliding of lock department. The utility model has the advantages of can realize quick assembly and disassembly.

Description

Technical Field

[0001] This utility model belongs to the field of fitness equipment technology, and in particular relates to a quick-release pulley system and training device. Background Technology

[0002] In the field of fitness equipment, detachable pulley systems are widely used in training devices such as gantry cranes and lat pulldown machines to enable quick switching between training modes. Currently, most detachable pulley systems employ a rotating pin locking structure. This structure requires both hands to operate during installation and removal—both must maintain the pulley assembly's positioning and the pin must be manually rotated to a specific angle to lock or release, which is inconvenient. Utility Model Content

[0003] To address the shortcomings of existing technologies, a quick-release pulley block that allows for rapid assembly and disassembly is provided.

[0004] This utility model is achieved using the following technical solution: a quick-release pulley system, comprising:

[0005] A fastener for fixing to a trainer, the fastener having a mounting groove extending in a first direction, and a locking hole with a lateral opening on the side wall of the mounting groove;

[0006] A movable component, detachably assembled to the fixed component, the movable component comprising:

[0007] Pulley system;

[0008] The locking part has a mating structure that is complementary to the shape of the mounting groove, for slidingly engaging with the mounting groove along a first direction;

[0009] A driving cavity extends along a first direction and is disposed adjacent to a locking portion. The driving cavity is provided with a pressing rod and an elastic element. The elastic element applies a spring force to the pressing rod to move it outward from the driving cavity.

[0010] The clearance groove communicates with the drive cavity and extends laterally through the locking part;

[0011] A locking block is rotatably connected in a clearance groove. One end of the locking block is connected to a pressing rod. When the pressing rod is in its natural state, the other end of the locking block extends out to the outside of the clearance groove and engages with the lock hole to limit the sliding of the locking part.

[0012] When the pressing rod is pressed, it can drive the locking block to rotate until it is fully retracted into the clearance groove, thus disengaging from the lock hole.

[0013] During use, the user can directly press the push rod to retract the locking block into the clearance groove, then insert the locking part into the mounting groove. Alternatively, the user can directly insert the locking part of the movable component into the mounting groove, and the locking block will automatically retract into the clearance groove under pressure. When the locking block passes through the keyhole area, it will automatically pop out and enter the keyhole under the action of the elastic element. At this point, the locking part cannot slide in the mounting groove, thus securing the fixed and movable components. Therefore, installation is very simple; a simple insertion is all it takes to lock the two components. When disassembly is required, the user only needs to press the push rod and then pull the movable component upwards, which is very convenient.

[0014] The elastic element can be a tension spring or a compression spring.

[0015] Preferably, the pressing rod has a reduced diameter section with a diameter smaller than that of the pressing rod body, creating a stepped surface between the reduced diameter section and the pressing rod body. The reduced diameter section moves within the area where the driving cavity and the clearance groove communicate. One end of the locking block that is connected to the pressing rod abuts against the stepped surface and has an engaging notch for the reduced diameter section to pass through, thereby realizing the transmission connection between the locking block and the pressing rod.

[0016] The engagement notch and the reduced-diameter section work together to allow the locking block to rotate when the pressing rod moves axially. This causes the other end of the locking block to extend or retract into the clearance groove, thus locking or unlocking the moving part and the fixed part. Furthermore, the engagement notch can adaptively rotate at an angle without requiring an additional pivot shaft.

[0017] Preferably, the inner side of the engagement notch is provided with a limiting surface that can abut against the reduced diameter section. When the pressing rod moves to the outside of the drive cavity, the limiting surface moves toward the reduced diameter section and abuts against the reduced diameter section to limit the extreme position of the pressing rod's outward movement.

[0018] When the pressing rod is pulled outward, the locking block will also rotate, and the limiting surface will move towards the reduced diameter section. When the pressing rod is pulled to a certain position, the limiting surface will eventually abut against the reduced diameter section, making it impossible for the pressing rod to be pulled out.

[0019] Preferably, the bottom end of the pressing rod is always located in the driving cavity and is in clearance fit with the driving cavity. The elastic element is a compression spring and is coaxially arranged with the pressing rod. One end of the compression spring abuts against the bottom end of the pressing rod, and the other end abuts against the bottom of the driving cavity.

[0020] Since the clearance groove and the drive cavity are connected, there is a common area between the drive cavity and the clearance groove. This area does not restrict the pressing rod or the elastic element. Therefore, in order to ensure the stability of the pressing rod and the spring during movement, it is necessary to ensure that the lower end of the pressing rod is always located in the drive cavity, and the compression spring is also always located in the drive cavity. The drive cavity can axially limit the deformation direction of the compression spring to ensure the stability of the compression spring.

[0021] Preferably, the mounting groove includes a wide section and a narrow section from the inside out, and the locking part is provided with a thick section adapted to the wide section and a thin section adapted to the narrow section; when the mounting groove and the locking part are engaged, they form a circumferential limit on the fixed part and the moving part.

[0022] The above settings can achieve circumferential limiting of fixed and moving parts.

[0023] Preferably, the top end of the movable part is provided with an abutting portion that abuts against the top end of the fixed part; when the locking part is fully embedded in the mounting groove, the abutting portion abuts against the top end of the fixed part to limit the axial sliding of the movable part.

[0024] The abutting part and the top of the fixing part abut against each other, thereby preventing the moving part from continuing to slide and move along the insertion direction, causing the locking block to retract back into the clearance groove after being squeezed against the wall of the lock hole.

[0025] Preferably, the bottom of the locking block is provided with a guide curved surface or a guide inclined surface. When the locking part is inserted into the mounting groove, the guide curved surface or guide inclined surface of the locking block contacts the fixing member, so that the locking block can automatically retract into the clearance groove.

[0026] By setting a guide ramp or guide curve at the bottom of the locking block, it is easier for the locking block to rotate, allowing it to automatically retract into the clearance groove. This facilitates the installation of the moving and fixed parts by the user.

[0027] Preferably, the fastener is used for rigid fixation to the frame of the trainer; or

[0028] The fixing component is provided with a sliding sleeve, which is used to be fitted onto the frame of the trainer and slides in cooperation with the frame. The wall of the sliding sleeve is provided with an elastic pin lock to lock the fixing component and the frame at a certain height. The end of the pin of the elastic pin lock is provided with a rolling or rotating part to prevent scratching and damage to the frame.

[0029] The rigid fixing can be achieved through welding, screw fixing, etc. The trainer's frame is actually a rod with position holes. By setting a rolling or rotating component at the end of the elastic pin lock, scratching of the frame can be avoided when adjusting the position along the vertical direction of the sliding sleeve.

[0030] Preferably, the pulley assembly includes a frame rotatably connected to a movable component, and the frame contains rotatable pulleys.

[0031] A training device having the above-mentioned quick-release pulley system includes a frame on which the fixing member is fixedly or movably connected.

[0032] Compared with the prior art, the advantages of this utility model are: it can quickly assemble and disassemble the moving parts with pulley blocks from the fixed parts, which is convenient for users and saves installation time. Attached Figure Description

[0033] Figure 1 This is a structural diagram of the trainer and the quick-release pulley system located on the trainer.

[0034] Figure 2 for Figure 1 A sectional view at point A;

[0035] Figure 3 for Figure 1 A schematic diagram of the quick-release pulley block at point A;

[0036] Figure 4 This is a structural diagram showing the fixed and moving parts when separated.

[0037] Figure 5 This is a structural diagram of the moving part;

[0038] Figure 6 This is a structural diagram of the components inside the moving part;

[0039] Figure 7 This is a schematic diagram of the locking block and the pressing rod.

[0040] Figure 8 for Figure 5 A sectional view;

[0041] Figure 9 for Figure 8 A cross-sectional view after removing the locking block, pressing rod, and elastic element;

[0042] Figure 10 This is a schematic diagram of the structure after the movable part is fixed to another fixed part.

[0043] Reference numerals: 1. Trainer; 100. First frame; 200. Second frame; 2. Fixing component; 21. Mounting slot; 211. Wide section; 212. Narrow section; 22. Sleeve hole; 23. Sliding sleeve; 231. Elastic pin lock; 2311. Rotating component; 24. Locking hole; 3. Moving component; 31. Locking part; 311. Thick section; 312. Thin section; 32. Drive cavity; 33. Clearance groove; 34. Abutment part; 4. Locking block; 41. Rotating shaft; 42. Engaging notch; 421. Limiting surface; 43. Guide curved surface or guide inclined surface; 5. Pressing rod; 51. Reduced diameter section; 52. Stepped surface; 6. Frame; 61. Pulley; 7. Screw; 8. Elastic component. Detailed Implementation

[0044] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0045] This embodiment discloses a quick-release pulley system and a training device 1. Figure 1 and Figure 10 The trainer 1 is equipped with a quick-release pulley system. The trainer 1 has a frame, which includes a vertically arranged first frame 100 and a horizontally arranged second frame 200. The fasteners 2 of the quick-release pulley system are fixed to the first frame 100 and the second frame 200 respectively and can be detachably fixed to the movable parts 3.

[0046] like Figures 1 to 4 as well as Figure 10 As shown, the fixing member 2 is rigidly fixed to the second frame 200 by screws 7 threadedly engaging. The first frame 100 is an existing stop bar with vertically evenly spaced slots. The fixing member 2 is provided with a sliding sleeve 23, which has a vertically penetrating sleeve hole 22. The sliding sleeve 23 is used to fit onto the first frame 100 of the trainer and slide in engagement with the first frame 100. The wall of the sliding sleeve 23 is provided with an elastic pin lock 231 to achieve a high-level locking between the fixing member 2 and the first frame 100. The pin end of the elastic pin lock 231 is provided with a rotating part 2311, which is a pulley. The rotation avoids scratching the first frame 100. The rotating part 2311 can also be replaced with a rolling part (not shown in the figure). For example, the rolling part can be a ball, and a ball groove is provided at the pin end of the elastic pin lock 231, with a ball placed in the groove.

[0047] like Figures 2 to 9 As shown, the fastener 2 has a mounting groove 21 extending in the vertical direction (first direction), and both the upper and lower ends of the mounting groove 21 penetrate the fastener 2. A locking hole 24 with a lateral opening is provided on the side wall of the mounting groove 21. The mounting groove 21 is a T-shaped groove, which includes a wide section 211 and a narrow section 212 that are interconnected from the inside to the outside. The width of the wide section 211 is greater than the width of the narrow section 212, thus forming a T-shaped structure.

[0048] The movable component 3 includes a pulley system and a locking part 31. The pulley system includes a frame 6 rotatably connected to the movable component 3, and two rotatable pulleys 61 are provided inside the frame 6. The locking part 31 has a matching structure that complements the shape of the mounting groove 21, that is, the locking part 31 is also T-shaped. The locking part 31 has a thick section 311 adapted to the wide section 211 and a thin section 312 adapted to the narrow section 212. When the mounting groove 21 and the locking part 31 are engaged, they form a circumferential limit on the fixed component 2 and the movable component 3.

[0049] The movable component 3 also includes a driving cavity 32 extending vertically (in the first direction) and adjacent to the locking part 31. The middle region of the driving cavity 32 communicates with a clearance groove 33, dividing the driving cavity 32 into upper and lower parts. The driving cavity 32 contains a pressing rod 5 and an elastic element 8. The bottom end of the pressing rod 5 is always located within the lower driving cavity 32 and is in clearance fit with it. The elastic element 8 is located below the pressing rod 5. The elastic element 8 is a compression spring and is coaxially arranged with the pressing rod 5. The upper end of the elastic element 8 abuts against the bottom end of the pressing rod 5, and the lower end abuts against the bottom of the driving cavity 32.

[0050] The clearance groove 33 in the movable part 3 extends laterally through the locking part 31. A locking block 4 is rotatably connected within the clearance groove 33 via a rotating shaft 41. One end of the locking block 4 is connected to the pressing rod 5. When the pressing rod 5 is in its natural state, the other end of the locking block 4 extends out of the clearance groove 33 and engages with the lock hole 24 to limit the sliding of the locking part 31. When the pressing rod 5 is pressed, it can drive the locking block 4 to rotate until it is fully retracted into the clearance groove 33, releasing the engagement with the lock hole 24. The bottom of the locking block 4 is provided with a guide surface or guide slope 43. When the locking part 31 is inserted into the mounting groove 21, the guide surface or guide slope 43 of the locking block 4 contacts the wall at the opening of the mounting groove 21 of the fixing part 2, allowing the locking block 4 to automatically retract into the clearance groove 33.

[0051] The middle region of the pressing rod 5 has a reduced diameter section 51, the diameter of which is smaller than the diameter of the pressing rod 5 body. This creates two stepped surfaces 52 between the reduced diameter section 51 and the pressing rod 5 body. The reduced diameter section 51 moves within the area connecting the driving cavity 32 and the clearance groove 33. One end of the locking block 4, which is connected to the pressing rod 5, abuts against the stepped surface 52 and has a locking notch 42 through which the reduced diameter section 51 passes, thus achieving the transmission connection between the locking block 4 and the pressing rod 5. This allows the locking block 4 to rotate when the pressing rod 5 moves axially. A limiting surface 421, which abuts against the reduced diameter section 51, is provided inside the locking notch 42. When the pressing rod 5 moves outward from the driving cavity 32, the limiting surface 421 moves toward the reduced diameter section 51 and abuts against it, limiting the extreme position of the pressing rod 5's outward movement.

[0052] The top of the movable part 3 is provided with an abutment portion 34 that abuts against the top of the fixed part 2. The abutment portion 34 is an iron plate, which is fixed to the top of the movable part 3 by screws. When the locking part 31 is fully embedded in the mounting groove 21, the abutment portion 34 abuts against the top of the fixed part 2 to limit the axial sliding of the movable part 3.

[0053] During the installation of the movable part 3 and the fixed part 2, the locking part 31 is aligned with the mounting groove 21 and inserted into the mounting groove 21. During insertion, the locking block 4 abuts against the fixed part 2 and automatically retracts into the clearance groove 33, allowing the locking part 31 to be smoothly inserted into the mounting groove 21. When the abutting part 34 abuts against the top of the fixed part 2, the locking part 31 and the mounting groove 21 are fully engaged, and the locking block 4 moves to the area of ​​the lock hole 24. Under the action of the elastic member 8, the pressing rod 5 moves, causing the locking block 4 to protrude from the clearance groove 33 and extend into the lock hole 24, thereby limiting the sliding of the locking part 31.

[0054] When disassembly is required, the user presses the pressing rod 5, causing the locking block 4 to retract into the clearance groove 33. At this time, the movable part 3 can be directly pulled out from the fixed part 2.

Claims

1. A quick-release pulley system, characterized in that, include: A fastener for fixing to a trainer, the fastener having a mounting groove extending in a first direction, and a locking hole with a lateral opening on the side wall of the mounting groove; A movable component, detachably assembled to the fixed component, the movable component comprising: Pulley system; The locking part has a mating structure that is complementary to the shape of the mounting groove, for slidingly engaging with the mounting groove along a first direction; A driving cavity extends along a first direction and is disposed adjacent to a locking portion. The driving cavity is provided with a pressing rod and an elastic element. The elastic element applies a spring force to the pressing rod to move outward from the driving cavity. The clearance groove communicates with the drive cavity and extends laterally through the locking part; A locking block is rotatably connected in a clearance groove. One end of the locking block is connected to a pressing rod. When the pressing rod is in its natural state, the other end of the locking block extends out to the outside of the clearance groove and engages with the lock hole to limit the sliding of the locking part. When the pressing rod is pressed, it can drive the locking block to rotate until it is fully retracted into the clearance groove, thus disengaging from the lock hole.

2. The quick-release pulley block according to claim 1, characterized in that: The pressing rod has a reduced diameter section, the diameter of which is smaller than the diameter of the pressing rod body, so that a stepped surface is created between the reduced diameter section and the pressing rod body. The reduced diameter section moves in the area where the driving cavity and the clearance groove are connected. One end of the locking block that is connected to the pressing rod abuts against the stepped surface and has a locking notch for the reduced diameter section to pass through, so as to realize the transmission connection between the locking block and the pressing rod.

3. The quick-release pulley block according to claim 2, characterized in that: The inner side of the engagement notch is provided with a limiting surface that can abut against the reduced diameter section. When the pressing rod moves to the outside of the drive cavity, the limiting surface moves toward the reduced diameter section and abuts against the reduced diameter section to limit the extreme position of the pressing rod's outward movement.

4. The quick-release pulley block according to claim 1, characterized in that: The bottom end of the pressing rod is always located in the driving cavity and is in clearance fit with the driving cavity. The elastic element is a compression spring and is coaxially arranged with the pressing rod. One end of the compression spring abuts against the bottom end of the pressing rod, and the other end abuts against the bottom of the driving cavity.

5. The quick-release pulley block according to claim 1, characterized in that: The mounting groove includes a wide section and a narrow section from the inside out. The locking part is provided with a thick section that matches the wide section and a thin section that matches the narrow section. When the mounting groove and the locking part are engaged, they form a circumferential limit on the fixed part and the moving part.

6. The quick-release pulley block according to claim 1, characterized in that: The top of the movable part is provided with an abutting part that abuts against the top of the fixed part; when the locking part is fully embedded in the mounting groove, the abutting part abuts against the top of the fixed part to limit the axial sliding of the movable part.

7. The quick-release pulley block according to claim 1, characterized in that: The bottom of the locking block is provided with a guide curved surface or a guide inclined surface. When the locking part is inserted into the mounting groove, the guide curved surface or guide inclined surface of the locking block contacts the fixing part, so that the locking block can automatically retract into the clearance groove.

8. The quick-release pulley block according to any one of claims 1 to 7, characterized in that: The fastener is used for rigid fixation to the frame of the trainer; or The fixing component is provided with a sliding sleeve, which is used to be fitted onto the frame of the trainer and slides in cooperation with the frame. The wall of the sliding sleeve is provided with an elastic pin lock to lock the fixing component and the frame at a certain height. The end of the pin of the elastic pin lock is provided with a rolling or rotating part to prevent scratching and damage to the frame.

9. The quick-release pulley block according to any one of claims 1 to 7, characterized in that: The pulley assembly includes a frame rotatably connected to a movable component, and the frame contains rotatable pulleys.

10. A training device having the quick-release pulley system according to any one of claims 1 to 9, characterized in that: It includes a frame, on which the fasteners are fixedly or movably connected.

Images