Tension-adjustable spinning pulley

Abstract

The utility model relates to the field of spinning pulley, concretely relates to a tension adjustable spinning pulley, including the wheel body, the inner wall fixed connection of wheel body has the fixed cylinder, support subassembly, support subassembly sets up the outside of fixed cylinder, support subassembly includes two groups of ball bearings, two groups ball bearings interference fit in the outside of fixed cylinder, the outer ring surface of ball bearing all fixedly connected with the connecting cylinder, the outside fixed connection of connecting cylinder has support arm a, the outside rotatory connection of connecting cylinder has support arm b. Through support arm a and support arm b constitute V-shaped structure, cooperate the spring elasticity connection design of pressure subassembly, can be according to the belt tension change self -adaptation adjustment, when the belt long -term use stretch relaxation, the pre -tightening force of tension spring pulls support arm a and support arm b, drive the roller assembly's cylinder always close to the belt, automatic compensation relaxation, avoid the belt slip, guarantee power transmission efficiency stable.

Description

Technical Field

[0001] This utility model relates to the field of spun pulleys, specifically to a spun pulley with adjustable tension. Background Technology

[0002] Spin-formed pulleys, with their core advantages of lightweight, high strength, and high material utilization brought by the spin forming process, have been widely used in various belt drive systems such as electric motors, diesel engines, conveyors, and lifting equipment, becoming a key component for power transmission. They apply pressure to a rotating metal blank using a spinning wheel, causing the material to flow radially and take shape. They can be manufactured in different specifications, such as single-groove and multi-groove, to suit diverse transmission scenarios.

[0003] In belt drive systems, belt tension directly determines transmission efficiency, operational stability, and component lifespan. If the belt is too loose, slippage and tooth skipping are likely to occur, leading to power transmission loss and abnormal noise during equipment operation. If the belt is too tight, it will accelerate bearing wear, increase motor load, and shorten the lifespan of the belt and pulleys. Especially under long-term continuous operation conditions, the belt will gradually lengthen due to tensile fatigue, resulting in a continuous decrease in tension.

[0004] Most traditional spinning pulleys are integrated and fixed, lacking self-adjusting tension. When the belt slacks, external tensioning pulleys, adjusting screws, and other additional components are required for tensioning. This not only increases the overall size of the equipment, installation complexity, and production costs, but also suffers from low adjustment accuracy and large space occupation. Therefore, it is necessary to invent a tension-adjustable spinning pulley to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a tension-adjustable spinning pulley that replaces the traditional external tensioning component with a built-in elastic support adjustment structure. This solves the problems of traditional spinning pulleys lacking self-adjusting tension function and relying on external components, resulting in large equipment size, complex installation, and high cost.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a tension-adjustable spinning pulley, comprising... A wheel body, wherein a fixed cylinder is fixedly connected to the inner wall of the wheel body; A support assembly is disposed on the outside of a fixed cylinder. The support assembly includes two sets of ball bearings, which are interference-fitted on the outside of the fixed cylinder. A connecting cylinder is fixedly connected to the outer ring surface of each ball bearing. A support arm a is fixedly connected to the outside of the connecting cylinder, and a support arm b is rotatably connected to the outside of the connecting cylinder. Two adjacent sets of support arms a and two adjacent sets of support arms b are fixedly connected by a roller assembly. The pressure assembly is provided in two sets. The pressure assembly includes a fixing frame, which is fixedly connected to the outside of support arm a and support arm b. The multiple sets of fixing frames provided on the outside of support arm a and support arm b are elastically connected by tension springs.

[0007] Preferably, the roller assembly includes a mounting groove, which is formed at the ends of support arms a and b away from the fixed cylinder. A fixing member is fixedly installed at the ends of support arms a and b away from the fixed cylinder by bolts. The fixing member is inserted into the inner wall of the mounting groove. A support shaft is provided on the inner wall of the mounting groove. A slot is formed on the outer side of the support shaft. A locking block is fixedly connected to one end of the fixing member near the mounting groove. The locking block is inserted into the inner wall of the slot. A bearing A is provided on the outer side of the support shaft. A roller for contacting the belt is fixedly connected to the outer side of the bearing A.

[0008] Preferably, the cross-section of the fixing frame is T-shaped.

[0009] Preferably, the support arm a and the support arm b form a V shape.

[0010] Preferably, the portion of the mounting groove that contacts the support shaft of the fixing member is an arc surface, and the locking block is disposed on the arc surface portion of the fixing member.

[0011] The technical effects and advantages provided by this utility model in the above technical solution are as follows: This utility model uses a V-shaped structure composed of support arm a and support arm b, combined with the elastic connection design of the tension spring of the pressure component, which can adaptively adjust according to the changes in belt tension. When the belt stretches and loosens after long-term use, the preload of the tension spring pulls support arm a and support arm b, driving the roller of the roller assembly to always keep in close contact with the belt, automatically compensating for the slack, avoiding belt slippage, and ensuring stable power transmission efficiency. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0013] Figure 1 This is a three-dimensional structural diagram of the overall device in this utility model; Figure 2 This is a three-dimensional structural disassembly diagram of the support component in this utility model; Figure 3 This is a three-dimensional structural diagram of the support component and the pressure component in this utility model; Figure 4This is a three-dimensional structural disassembly diagram of the roller assembly in this utility model; Figure 5 This is a three-dimensional structural installation diagram of the overall device in this utility model.

[0014] Legend: 1. Wheel body; 2. Fixed cylinder; 3. Support assembly; 31. Ball bearing; 32. Connecting cylinder; 33. Support arm a; 34. Support arm b; 4. Pressure assembly; 41. Fixing frame; 42. Tension spring; 5. Roller assembly; 51. Mounting groove; 52. Fixing element; 53. Locking block; 54. Support shaft; 55. Bearing A; 56. Roller; 57. Locking groove. Detailed Implementation

[0015] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0016] This utility model provides, for example Figure 1 - Figure 3 The tension-adjustable spinning pulley shown includes a pulley body 1, a support assembly 3, and a pressure assembly 4; The inner wall of the wheel body 1 is fixedly connected to the fixing cylinder 2. The wheel body 1 is spun to ensure structural strength and lightweight characteristics. The fixing cylinder 2 is used to fix the support component 3, provide an installation reference for the ball bearing 31, and ensure the coaxiality of the support component 3 and the wheel body 1. Support component 3 is located on the outside of fixed cylinder 2. Support component 3 is used to build the support frame of roller 56. Support component 3 includes two sets of ball bearings 31 to realize the relative rotation of connecting cylinder 32 and fixed cylinder 2, reducing frictional resistance during adjustment. The two sets of ball bearings 31 are interference-fitted on the outside of fixed cylinder 2. Connecting cylinder 32 is fixedly connected to the outer ring surface of ball bearing 31, connecting ball bearing 31 with support arm a33 and support arm b34, transmitting the force and rotation of support arm a33 and support arm b34. Support arm a33 is fixedly connected to the outside of connecting cylinder 32, and forms a V-shaped support structure with support arm b34, providing a stable mounting carrier for roller assembly 5. Support arm b34 is rotatably connected to the outside of connecting cylinder 32, and can rotate around connecting cylinder 32. With the help of tension spring 42, the tension angle can be flexibly adjusted. Two adjacent sets of support arms a33 and two adjacent sets of support arms b34 are fixedly connected through roller assembly 5. Roller assembly 5 is in direct contact with belt to realize tension transmission and adaptive tensioning. The pressure assembly 4 is provided in two sets. The pressure assembly 4 includes a fixing frame 41 for fixing the tension spring 42. Its T-shaped cross-section design prevents the tension spring 42 from detaching. The fixing frame 41 is fixedly connected to the outside of the support arm a33 and the support arm b34. The multiple sets of fixing frames 41 provided on the outside of the support arm a33 and the support arm b34 are elastically connected by the tension spring 42 to provide continuous pretension force, drive the support arm a33 and the support arm b34 to drive the roller 56 to press against the belt, automatically compensate for the belt slack, and adjust the pretension force by replacing the tension spring 42 with different elastic coefficients.

[0017] like Figure 2 - Figure 4 As shown, the roller assembly 5 includes a mounting groove 51 for accommodating the support shaft 54 ​​and the fixing member 52, providing installation space for the various components of the roller assembly 5. The mounting groove 51 is located at the ends of the support arms a33 and b34 away from the fixed cylinder 2. The fixing member 52 is bolted to the ends of the support arms a33 and b34 away from the fixed cylinder 2, pressing and fixing the support shaft 54. Its arc surface design fits the support shaft 54 ​​to improve the fixing stability. The fixing member 52 is inserted into the inner wall of the mounting groove 51. The inner wall of the mounting groove 51 is provided with the support shaft 54, providing rotational support for the bearing A55 and the roller 56, ensuring the smooth rotation of the roller 56. A slot 57 is provided on the outer side, which cooperates with the locking block 53 to achieve precise positioning of the support shaft 54 ​​and prevent the support shaft 54 ​​from moving axially. The end of the fixing member 52 near the mounting groove 51 is fixedly connected to the locking block 53, which is inserted into the slot 57 to lock the support shaft 54 ​​and enhance the structural stability of the roller assembly 5. The locking block 53 is inserted into the inner wall of the slot 57. A bearing A55 is provided on the outer side of the support shaft 54 ​​to reduce the friction between the roller 56 and the support shaft 54, reduce the rotation resistance, and extend the service life of the component. A roller 56 for contacting the belt is fixedly connected on the outer side of the bearing A55, which directly contacts the belt to transmit tension force, and at the same time reduces friction loss with the belt through rotation.

[0018] like Figure 3 - Figure 5 As shown, the cross-section of the fixing frame 41 is T-shaped, and the support arm a33 and the support arm b34 form a V-shape, so that the tension of the tension spring 42 is more efficiently converted into the tension force of the roller 56 on the belt, improving the tension adjustment sensitivity. The part of the mounting groove 51 that contacts the support shaft 54 ​​with the fixing part 52 is set as an arc surface to increase the fit with the support shaft 54. The locking block 53 is set on the arc surface part of the fixing part 52 to ensure that the locking block 53 and the locking groove 57 are precisely aligned, improving the locking reliability.

[0019] The working principle of this utility model is as follows: When the device is installed, the belt is wrapped around the working surface of the wheel body 1. The roller 56 of the roller assembly 5 is in close contact with the outer side of the belt. In the pressure assembly 4, multiple sets of fixing frames 41 are elastically connected by tension springs 42. In the initial state, the tension springs 42 are in a pre-stretched state, generating an inward pulling force, which is transmitted to the roller 56 through the support arm a33 and the support arm b34, so that the roller 56 applies an initial tension force to the belt.

[0020] During equipment operation, the belt will gradually stretch and loosen due to long-term stress, resulting in a decrease in tension. At this time, the preload of the tension spring 42 is greater than the reaction force of the belt on the roller 56. The tension spring 42 contracts and pulls the support arm a33 and the support arm b34. The support arm b34 rotates inward around the connecting cylinder 32, and the support arm a33 moves synchronously with the connecting cylinder 32 to automatically compensate for the belt slack and maintain a stable belt tension.

[0021] During transmission, the roller 56 rotates flexibly around the support shaft 54 ​​via the bearing A55, converting the sliding friction between the belt and the roller 56 into rolling friction, significantly reducing friction loss and extending the service life of the belt and the roller 56. The support shaft 54 ​​is precisely positioned by the slot 57 and the locking block 53 of the fixing part 52. The arc-shaped fit design of the mounting groove 51 and the fixing part 52 ensures that the support shaft 54 ​​is stable and does not move, ensuring the stability of the contact between the roller 56 and the belt and preventing transmission deviation.

[0022] If the initial tension needs to be adjusted according to the belt specifications or operating conditions, this can be achieved by replacing the tension spring 42 with one of different elastic coefficients. The larger the elastic coefficient, the stronger the initial tension, suitable for heavy-duty, high-load transmission scenarios; the smaller the elastic coefficient, the gentler the initial tension, suitable for lightweight, high-precision transmission scenarios. When replacing the tension spring 42, simply remove the tension spring 42 from the mounting bracket 41. The operation is convenient and does not require complete disassembly of the device.

[0023] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A tension-adjustable spinning pulley, characterized in that: include Wheel body (1), the inner wall of which is fixedly connected to a fixed cylinder (2); Support assembly (3) is located on the outside of fixed cylinder (2). The support assembly (3) includes two sets of ball bearings (31). The two sets of ball bearings (31) are interference-fitted on the outside of fixed cylinder (2). Connecting cylinders (32) are fixedly connected to the outer ring surface of each ball bearing (31). Support arm a (33) is fixedly connected to the outside of the connecting cylinder (32). Support arm b (34) is rotatably connected to the outside of the connecting cylinder (32). Adjacent sets of support arms a (33) and adjacent sets of support arms b (34) are fixedly connected by roller assembly (5). Pressure assembly (4), the pressure assembly (4) is provided in two sets, the pressure assembly (4) includes a fixing frame (41), the fixing frame (41) is fixedly connected to the outside of the support arm a (33) and the support arm b (34), and the multiple sets of fixing frames (41) provided on the outside of the support arm a (33) and the support arm b (34) are elastically connected by tension springs (42).

2. The adjustable tension spinning pulley according to claim 1, characterized in that: The roller assembly (5) includes a mounting groove (51), which is located at the ends of the support arm a (33) and support arm b (34) away from the fixed cylinder (2). The ends of the support arm a (33) and support arm b (34) away from the fixed cylinder (2) are fixedly mounted with fasteners (52) by bolts. The fasteners (52) are inserted into the inner wall of the mounting groove (51). The inner wall of the mounting groove (51) is provided with a support shaft (54). The outer side of the support shaft (54) is provided with a slot (57). The end of the fastener (52) near the mounting groove (51) is fixedly connected with a locking block (53). The locking block (53) is inserted into the inner wall of the slot (57). The outer side of the support shaft (54) is provided with a bearing A (55). The outer side of the bearing A (55) is fixedly connected with a roller (56) for contacting the belt.

3. The adjustable tension spinning pulley according to claim 2, characterized in that: The cross-section of the fixing frame (41) is T-shaped.

4. The adjustable tension spinning pulley according to claim 1, characterized in that: The support arm a (33) and the support arm b (34) form a V shape.

5. The adjustable tension spinning pulley according to claim 2, characterized in that: The part of the mounting groove (51) that contacts the support shaft (54) of the fixing member (52) is set as an arc surface, and the locking block (53) is set on the arc surface part of the fixing member (52).

Images