A resistance-adjustable pull-up device

Abstract

The utility model discloses a kind of resistance-adjustable tensioners, including shell, drive shaft sleeve, winding wheel, pull rope and main clock spring, drive shaft sleeve is rotatably connected in shell, main clock spring is installed between drive shaft sleeve and shell, winding wheel is fixedly connected on drive shaft sleeve, shell is provided with rope outlet, pull rope one end is wound on winding wheel, the other end extends to shell outside through rope outlet, tensioner further includes transmission shaft, driver, and at least one driven shaft sleeve and secondary clock spring, driven shaft sleeve is rotatably connected in shell, and coaxially with drive shaft sleeve setting, driven shaft sleeve and shell are installed above-mentioned secondary clock spring between, drive shaft sleeve and driven shaft sleeve inside are not round, transmission shaft one end is slidably connected in drive shaft sleeve, driver can be driven transmission shaft axial motion by hand or electricity, to make transmission shaft other end insert or leave driven shaft sleeve.The utility model proposes a kind of resistance-adjustable tensioners, and resistance is more convenient and fast to adjust.

Description

Technical Field

[0001] This utility model relates to the field of fitness equipment technology, and in particular to resistance bands. Background Technology

[0002] Resistance bands are a common type of exercise equipment. Existing resistance bands, as shown in patent application number CN201420214087.8, include multiple resistance boxes and multiple screws corresponding to each resistance box. Rotating the screw engages the resistance box, causing it to participate in the force, thus increasing the resistance of the resistance band. Conversely, rotating the screw disengages the resistance box, causing it to stop participating in the force, thus decreasing the resistance of the resistance band. This method of adjusting the resistance of resistance bands requires rotating each screw individually, which is inefficient and cumbersome. Utility Model Content

[0003] To address the shortcomings of existing resistance adjustment methods in which are inefficient and cumbersome, this invention proposes an adjustable resistance device that makes resistance adjustment more convenient and faster.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An adjustable resistance tensioner includes a housing, a drive bushing, a winding wheel, a pull rope, and a main spring. The drive bushing is rotatably connected to the housing. The main spring is installed between the drive bushing and the housing. The winding wheel is fixedly connected to the drive bushing. The housing has a rope outlet. One end of the pull rope is wound around the winding wheel, and the other end extends out of the housing through the rope outlet. The tensioner also includes a drive shaft, a driver, and at least one driven bushing and an auxiliary main spring. The driven bushing is rotatably connected to the housing and coaxially arranged with the drive bushing. The auxiliary main spring is installed between the driven bushing and the housing. The inner sides of the drive bushing and the driven bushing are not circular. One end of the drive shaft is slidably connected to the drive bushing. The driver can manually or electrically drive the drive shaft axially to insert or disengage the other end of the drive shaft into or out of the driven bushing.

[0005] With the above settings, the tensioner of this application adjusts the number of auxiliary springs engaged by moving the drive shaft axially through the driver, thereby adjusting the tensioner resistance, making resistance adjustment more convenient and efficient.

[0006] Furthermore, the driver includes a power supply, a motor, and a lead screw. The power supply supplies power to the motor, which is fixedly connected in the housing and driven by the lead screw. The lead screw is threadedly connected to the drive shaft.

[0007] With the above settings, the resistance of the tensioner can be adjusted electrically, further improving adjustment efficiency and convenience.

[0008] Furthermore, a controller connected to the motor is installed inside the housing, and the outer end of the pull rope is connected to the handle. A remote control is built into the handle, and the remote control can be connected to the controller via wireless signal to control the operation of the motor.

[0009] The above settings further enhance the convenience of resistance adjustment.

[0010] Furthermore, the housing includes a main housing, a bottom housing, and at least one secondary housing. The main housing is open at at least one end. The drive bushing, winding wheel, and main spring are all disposed in the main housing. The secondary spring and driven bushing are installed in the secondary housing. The secondary housing is fixedly connected to one end of the main housing. The driver is installed in the bottom housing. The bottom housing is fixedly connected to the side of the secondary housing away from the main housing.

[0011] The above settings facilitate the assembly of the tensioner.

[0012] Furthermore, the tensioner also includes multiple rollers that are rotatably connected to the rope outlet, through which the tension rope passes.

[0013] The above settings prevent friction between the pull rope and the rope outlet.

[0014] Furthermore, the tensioner also includes a Velcro strap located on the side of the housing away from the rope outlet.

[0015] Furthermore, a groove is provided on the side of the housing away from the rope outlet, and the tensioner also includes a connecting plate, which is locked to the opposite sides of the groove.

[0016] Furthermore, the driver includes a connecting rod and a push rod. One end of the connecting rod is rotatably connected to the drive shaft on the same axis. The push rod is fixedly connected to the connecting rod. A groove is provided on one side of the housing, and the end of the push rod is slidably connected in the groove.

[0017] With the above settings, the resistance of the tensioner can be adjusted manually.

[0018] Furthermore, a T-slot is provided at the end of the drive shaft, extending through to the side of the drive shaft, and an anti-pull-out key is fixedly connected to the end of the connecting rod, which is rotatably connected in the T-slot.

[0019] The above configuration facilitates the connection between the connecting rod and the drive shaft.

[0020] Furthermore, the slide groove is provided with multiple elastic elements along its extension direction. The ends of the elastic elements are spherical and protrude from the surface of the slide groove. The push rod is provided with a limiting groove, and the end of one of the elastic elements is embedded in the limiting groove.

[0021] The above settings improve the stability of the drive shaft.

[0022] Furthermore, the motor is connected to the lead screw drive via a coupling or clutch. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a tensioner according to one embodiment.

[0024] Figure 2 This is a cross-sectional view of a tensioner according to one embodiment.

[0025] Figure 3 An exploded view of a tensioner according to one embodiment.

[0026] Figure 4 This is a schematic diagram of the connection between the connecting rod and the drive shaft in one embodiment.

[0027] Figure 5 This is a schematic diagram of a tensioner according to one embodiment.

[0028] Figure 6 This is a schematic diagram of the tensioner from another perspective, representing one embodiment.

[0029] Figure 7 This is a cross-sectional view of a tensioner according to one embodiment. Detailed Implementation

[0030] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0031] like Figures 1 to 7 An adjustable resistance tensioner includes a housing 3, a drive bushing 4, a winding wheel 5, a pull rope 6, and a main spring 7. The drive bushing 4 is rotatably connected to the housing 3. The main spring 7 is installed between the drive bushing 4 and the housing 3. The winding wheel 5 is fixedly connected to the drive bushing 4. The housing 3 is provided with a rope outlet 8. One end of the pull rope 6 is wound around the winding wheel 5, and the other end extends out of the housing 3 through the rope outlet 8. The tensioner also includes a drive shaft 9, a driver, and at least one driven bushing 10 and a secondary spring 11. The driven bushing 10 is rotatably connected to the housing 3 and is coaxially arranged with the drive bushing 4. The secondary spring 11 is installed between the driven bushing 10 and the housing 3. The inner sides of the drive bushing 4 and the driven bushing 10 are not circular. One end of the drive shaft 9 is slidably connected to the drive bushing 4. The driver can manually or electrically drive the drive shaft 9 to move axially, so that the other end of the drive shaft 9 can be inserted into or removed from the driven bushing 10.

[0032] With the above settings, the tensioner of this application adjusts the number of auxiliary springs 11 engaged by moving the drive shaft 9 axially through the driver, thereby adjusting the tensioner resistance, making resistance adjustment more convenient and efficient.

[0033] Specifically, this application Figure 1The front, back, left, and right sides of the tensioner are indicated by the label to describe the technical solution. The housing 3 of this application can be an integral structure or a split structure. The housing 3 of this application is basically a hollow polygonal prism structure extending left and right, used for other components. The rope outlet 8 is located on the rear left side of the housing 3. The drive shaft sleeve 4 is coaxially rotatably connected to the left side of the housing 3. The winding wheel 5 is coaxially fixedly connected to the drive shaft sleeve 4. The main spring 7 is sleeved on the drive shaft sleeve 4. The inner end of the main spring 7 is fixedly connected to the drive shaft sleeve 4, and the outer end is fixedly connected to the inner wall of the housing 3. The inner cross-section of the drive shaft sleeve 4 is polygonal. At least one driven shaft sleeve 10 is provided. In this application, three driven shaft sleeves 10 are specifically provided, arranged from left to right on the right side of the drive shaft sleeve 4. The inner shape of the driven shaft sleeve 10 is consistent with the inner shape of the drive shaft sleeve 4. The drive shaft 9 is polygonal, with the inner sides of the drive sleeve 4 and driven sleeve 10 aligned. One end of the drive shaft 9 is slidably connected in the drive sleeve 4, while the other end can freely enter and exit the driven sleeve 10. Each driven sleeve 10 is fitted with a secondary spring 11, the inner end of which is fixedly connected to the driven sleeve 10, and the outer end of which is fixedly connected to the inner wall of the housing 3. The length L1 of the drive shaft 9 is greater than the distance L2 between the left end of the leftmost driven sleeve 10 and the left end of the rightmost driven sleeve 10, and less than the length of the drive sleeve 4. When the drive shaft 9 moves to the leftmost position, the entire drive shaft 9 is located within the drive sleeve 4, and the drive shaft 9 is not engaged with the driven sleeve 10. Pulling the pull rope 6 drives the winding wheel 5 and drive sleeve 4 to rotate, and the deformation of the main spring 7 provides resistance. At this time, the resistance of the puller is minimal, and the driver drives the drive shaft 9 to move axially to the right. Figure 2 The right end of the drive shaft 9 is inserted into the driven bushing 10. The more driven bushings 10 inserted, the greater the resistance. When the pull rope 6 is pulled, the drive bushing 4 drives the driven bushings 10 that cooperate with the drive shaft 9 to rotate synchronously, thereby causing the corresponding auxiliary spring 11 to deform. Note that the pull rope 6 in this application can be replaced by other long strip objects such as a tension belt, as long as the object can pass through the rope outlet 8 and be wound on the winding wheel 5.

[0034] In one implementation, the housing 3 includes a main housing 31, a bottom housing 32, and at least one sub-housing 33. The main housing 31 is open at least one end. The drive bushing 4, the winding wheel 5, and the main spring 7 are all disposed in the main housing 31. The sub-spring 11 and the driven bushing 10 are installed in the sub-housing 33. The sub-housing 33 is fixedly connected to one end of the main housing 31. The driver is installed in the bottom housing 32. The bottom housing 32 is fixedly connected to the side of the sub-housing 33 away from the main housing 31.

[0035] The above settings facilitate the assembly of the tensioner.

[0036] like Figure 3The main housing 31 is open on both the left and right sides. The drive shaft sleeve 4 and the winding wheel 5 are inserted into the main housing 31 through the right side of the main housing 31. The main spring 7 is inserted into the main housing 31 through the left side of the main housing 31. The main housing 31 is sealed by the end cap. The driven shaft sleeve 10 and the auxiliary spring 11 are installed into the auxiliary housing 33 from the right side. Multiple auxiliary housings 33 are installed sequentially on the right side of the main housing 31. The right end of the drive shaft 9 is connected to the driver. The driver is installed in the bottom housing 32. The left end of the drive shaft 9 is inserted into the drive shaft sleeve 4 through the driven shaft sleeve 10, and the bottom housing 32 is installed on the auxiliary housing 33.

[0037] As one implementation, the tensioner also includes multiple rollers 12, which are rotatably connected to the rope outlet 8, and the tension rope 6 passes between the rollers 12.

[0038] The above settings prevent friction between the pull rope 6 and the rope outlet 8.

[0039] In one embodiment, the tensioner also includes a Velcro strap 13 disposed on the side of the housing 3 away from the rope outlet 8.

[0040] like Figure 2 The front of the resistance band is fitted with Velcro 13, which can be used to fix the housing 3 to the table leg or bed leg for resistance training.

[0041] In another embodiment, a groove 14 is provided on the side of the housing 3 away from the rope outlet 8, and the tensioner also includes a connecting plate 15, which is locked to opposite sides of the groove 14.

[0042] like Figure 6 The groove 14 extends vertically, and small steel bars and other objects can be embedded in the groove 14. Then, fasteners are used to lock the connecting plate 15 onto the housing 3. The connecting plate 15 seals the opening of the groove 14 to prevent objects from leaving the groove 14, thus locking the housing 3.

[0043] In another embodiment, such as Figures 1 to 4 The driver includes a connecting rod 16 and a push rod 17. One end of the connecting rod 16 is rotatably connected to the transmission shaft 9 on the same axis. The push rod 17 is fixedly connected to the connecting rod 16. A slide groove 18 is provided on one side of the housing 3. The end of the push rod 17 is slidably connected in the slide groove 18.

[0044] With the above settings, the resistance of the tensioner can be adjusted manually.

[0045] Specifically, the connecting rod 16 is coaxially arranged with the transmission shaft 9. The connecting rod 16 is slidably connected in the bottom housing 32. The connecting rod 16 can only move axially. The push rod 17 is vertically locked to the connecting rod 16 by fasteners. The end of the push rod 17 protrudes out of the slide groove 18. The slide groove 18 is parallel to the connecting rod 16. Pushing the push rod 17 drives the transmission shaft 9 to move axially through the connecting rod 16 to adjust the resistance of the tensioner.

[0046] As one implementation, a T-groove 19 is provided at the end of the drive shaft 9, the T-groove 19 extends through to the side of the drive shaft 9, and an anti-pull-out key 20 is fixedly connected to the end of the connecting rod 16, the anti-pull-out key 20 being rotatably connected in the T-groove 19.

[0047] The above configuration facilitates the connection between the connecting rod 16 and the drive shaft 9.

[0048] like Figure 4 A T-groove 19 is provided at the right end of the drive shaft 9. The anti-pull-out key 20 is cylindrical with an outer diameter larger than that of the connecting rod 16. The anti-pull-out key 20 is embedded in the T-groove 19, which can prevent the connecting rod 16 from being pulled out of the T-groove 19 without affecting the rotation of the drive shaft 9.

[0049] As one implementation, the slide 18 is provided with a plurality of elastic members 21 along the extension direction. The ends of the elastic members 21 are spherical and protrude from the surface of the slide 18. The push rod 17 is provided with a limiting groove 22, and the end of one of the elastic members 21 is embedded in the limiting groove 22.

[0050] The above settings improve the stability of drive shaft 9.

[0051] The elastic element 21 of this application is specifically set on the upper or lower side of the slide groove 18. Taking the lower side as an example, the upper end of the elastic element 21 protrudes from the surface of the slide groove 18 and can float up and down elastically. When the push rod 17 moves left and right, the push rod 17 can push the elastic element 21 downward. When the limiting groove 22 moves to the position of the elastic element 21, the elastic element 21 rebounds and is embedded in the limiting groove 22. Under the action of the elastic element 21, the push rod 17 cannot easily move left and right, preventing the resistance of the tensioner from changing during exercise.

[0052] In another embodiment, such as Figures 5 to 7 The driver includes a power supply 23, a motor 24 and a lead screw 25. The power supply 23 supplies power to the motor 24. The motor 24 is fixedly connected in the housing 3 and is connected to the lead screw 25 for transmission. The lead screw 25 is threadedly connected to the transmission shaft 9.

[0053] With the above settings, the resistance of the tensioner can be adjusted electrically, further improving adjustment efficiency and convenience.

[0054] The power source 23 of this application can be an external socket or a battery. When a battery is used, the battery is installed on the housing 3 and electrically connected to the motor 24. The motor 24 drives the lead screw 25 to rotate, and the lead screw 25 rotates relative to the transmission shaft 9, thereby driving the transmission shaft 9 to move left and right. As one implementation, during exercise, the transmission shaft 9 is driven by the drive bushing 4. Under the action of friction on the surface of the transmission shaft 9, the transmission shaft 9 will not move left and right. Therefore, the transmission shaft 9 will drive the motor 24 to rotate through the lead screw 25. Under the action of electromagnetic induction, the motor 24 charges the battery to improve the battery life.

[0055] In one implementation, the motor 24 is connected to the lead screw 25 via a coupling 26 or a clutch (not shown in the figure).

[0056] like Figure 7 When motor 24 is connected to lead screw 25 via coupling 26, the rotor of motor 24 rotates synchronously with lead screw 25. When motor 24 is connected to lead screw 25 via clutch, such as electromagnetic clutch, during exercise, the clutch disengages the connection between motor 24 and lead screw 25, allowing lead screw 25 to rotate freely without being affected by the resistance of motor 24. When drive shaft sleeve 4 drives transmission shaft 9 to rotate, transmission shaft 9 can drive lead screw 25 to rotate synchronously, and there will be no relative rotation between lead screw 25 and transmission shaft 9, thus preventing transmission shaft 9 from moving left and right during exercise. When it is necessary to adjust the resistance of the tensioner, the clutch is closed, and motor 24 can drive lead screw 25 to rotate, thereby driving transmission shaft 9 to move left and right to adjust the resistance of the tensioner.

[0057] As one implementation, a controller (not shown in the figure) connected to the motor is installed inside the housing, and the outer end of the pull rope is connected to the handle 37. The handle has a built-in remote control (not shown in the figure). The remote control can connect to the controller via wireless signal to control the operation of the motor.

[0058] like Figure 5 The handle is connected to the outer end of the pull rope via a nylon strap or other high-strength strap. The handle is made of high-strength plastic and has a built-in remote control with Bluetooth or infrared functionality. It connects to the controller wirelessly and is similar to a smart TV remote control. An indicator light is located at the end of the remote control. When the remote control is connected to the controller, the indicator light displays one color; when the remote control is disconnected, the indicator light displays another color, so that the user can know whether the remote control is properly connected. The remote control can be voice controlled. For example, when you say "increase resistance" to the remote control, the remote control sends a signal to the controller, which controls the motor. The motor drives the lead screw to increase the resistance of the puller.

[0059] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A tension device with adjustable resistance, characterized in that, The device includes a housing, a drive bushing, a winding wheel, a pull rope, and a main spring. The drive bushing is rotatably connected to the housing. The main spring is installed between the drive bushing and the housing. The winding wheel is fixedly connected to the drive bushing. The housing has a rope outlet. One end of the pull rope is wound around the winding wheel, and the other end extends out of the housing through the rope outlet. The device also includes a drive shaft, a driver, and at least one driven bushing and an auxiliary main spring. The driven bushing is rotatably connected to the housing and coaxially arranged with the drive bushing. The auxiliary main spring is installed between the driven bushing and the housing. The inner sides of the drive bushing and the driven bushing are not circular. One end of the drive shaft is slidably connected to the drive bushing. The driver can manually or electrically drive the drive shaft axially to insert or disengage the other end of the drive shaft into or out of the driven bushing.

2. The adjustable resistance tensioner according to claim 1, characterized in that, The driver includes a power supply, a motor, and a lead screw. The power supply supplies power to the motor, which is fixedly connected in the housing and driven by the lead screw. The lead screw is threadedly connected to the drive shaft.

3. The adjustable resistance tensioner according to claim 2, characterized in that, The housing contains a controller connected to the motor. The outer end of the pull rope is connected to a handle, and a remote control is built into the handle. The remote control can be connected to the controller via a wireless signal to control the operation of the motor.

4. The adjustable resistance tensioner according to claim 1, characterized in that, The housing includes a main housing, a bottom housing, and at least one sub-housing. The main housing is open at at least one end. The drive bushing, winding wheel, and main spring are all disposed in the main housing. The sub-spring and driven bushing are installed in the sub-housing. The sub-housing is fixedly connected to one end of the main housing. The driver is installed in the bottom housing. The bottom housing is fixedly connected to the side of the sub-housing away from the main housing.

5. The adjustable resistance tensioner according to claim 1, characterized in that, The tensioner also includes multiple rollers, which are rotatably connected to the rope outlet, and the tension rope passes between the rollers.

6. The adjustable resistance tensioner according to claim 1, characterized in that, The tensioner also includes a Velcro strap located on the side of the housing away from the rope outlet.

7. The adjustable resistance tensioner according to claim 1, characterized in that, The housing has a groove on the side away from the rope outlet, and the tensioner also includes a connecting plate, which is locked to the opposite sides of the groove.

8. The adjustable resistance tensioner according to claim 1, characterized in that, The driver includes a connecting rod and a push rod. One end of the connecting rod is rotatably connected to the transmission shaft on the same axis. The push rod is fixedly connected to the connecting rod. A sliding groove is provided on one side of the housing, and the end of the push rod is slidably connected in the sliding groove.

9. A tensioner with adjustable resistance according to claim 8, characterized in that, The end of the drive shaft is provided with a T-shaped groove that extends through to the side of the drive shaft. The end of the connecting rod is fixedly connected with an anti-pull-out key, which is rotatably connected in the T-shaped groove.

10. A tensioner with adjustable resistance according to claim 8, characterized in that, The slide groove is provided with multiple elastic elements along its extension direction. The ends of the elastic elements are spherical and protrude from the surface of the slide groove. The push rod is provided with a limiting groove, and the end of one of the elastic elements is embedded in the limiting groove.

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