One-way transmission assembly

Abstract

The invention relates to the technical field of bearings, in particular to a one-way transmission assembly. The assembly comprises a one-way locking bearing and a transmission belt wheel, the one-way locking bearing comprises a one-way rotating outer ring and a fixing shaft, the transmission belt wheel is connected with the one-way rotating outer ring, a plurality of locking grooves distributed at equal intervals are formed in the circumferential side of the fixing shaft, and elastic switching assemblies are arranged in the locking grooves. The locking groove comprises a transmission part, a transition part and a locking part which are sequentially arranged in the circumferential direction, the groove bottom of the locking part is obliquely arranged, and the included angle between the groove bottom of the locking part and the groove wall of the locking part is an acute angle, so that the groove bottom and the groove wall of the locking part lock and position a roller in the elastic switching assembly. By the adoption of the one-way transmission assembly, the included angle between the groove bottom of the locking part and the groove wall of the locking part is the acute angle, so that the groove bottom and the groove wall of the locking part lock and position the roller in the elastic switching assembly, the contact area and the contact pressure in the locking state are increased, and the locking performance is improved.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, and more particularly to a unidirectional transmission assembly. Background Technology

[0002] Belt drives are a very common and important type of mechanical transmission. They utilize a ring-shaped belt tensioned on pulleys to transmit power and motion through the friction between the belt and the pulley grooves. Current technology achieves unidirectional operation through one-way bearings. It also uses locking grooves and elastic elements to lock the belt when the outer ring rotates in the opposite direction. However, current locking groove designs result in a small contact area between the rollers in the locked state, leading to poor locking performance and failing to meet the requirements for safe production. Summary of the Invention

[0003] The purpose of this invention is to provide a unidirectional transmission component to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the present invention provides a one-way transmission assembly, including a one-way locking bearing and a transmission pulley. The one-way locking bearing includes a one-way rotating outer ring and a fixed shaft. The transmission pulley is connected to the one-way rotating outer ring. The circumferential side of the fixed shaft has a plurality of equally spaced locking grooves. An elastic switching assembly is disposed in the locking groove. The locking groove includes a transmission part, a transition part, and a locking part arranged sequentially along the circumferential direction. The bottom of the locking part is inclined, and the angle between the bottom of the locking part and the groove wall of the locking part is an acute angle, so that the bottom of the locking part and the groove wall lock and position the roller in the elastic switching assembly.

[0005] Preferably, the angle between the bottom of the locking part and the groove wall of the locking part is 82°-86°.

[0006] Preferably, the transition section is straight, the inclination angle of the transition section is 30°, and the connection points between the two ends of the transition section and the transmission section and the locking section are chamfered.

[0007] Preferably, the groove bottom inclination angle of the locking part is 4°, the groove bottom inclination angle of the transmission part is 3°, and the lower end of the groove bottom of the locking part and the lower end of the groove bottom of the transmission part are respectively connected to the two ends of the transition part.

[0008] Preferably, reinforced sealing bearings are provided on the fixed shafts on both sides of the locking groove, dustproof baffles are provided on the fixed shafts on the outer side of the reinforced sealing bearings, and adjusting baffles are provided on the fixed shafts on the inner side of the reinforced sealing bearings to limit the axial position of the reinforced sealing bearings.

[0009] Preferably, the locking groove is provided with baffles on both sides to achieve sealing of the locking groove.

[0010] Preferably, the outer side of the transmission pulley has a belt groove.

[0011] Preferably, the elastic switching assembly includes a roller and a spring, with one end of the spring mounted on the inner wall of the transmission part and the other end of the spring disposed opposite to the roller.

[0012] Preferably, the inner wall of the transmission part is provided with a mounting thread groove, and an adjusting bolt is provided in the mounting thread groove, with one end of the spring fixed to the top of the adjusting bolt.

[0013] Preferably, the inner wall of the locking groove and the outer side of the transmission pulley are provided with an anti-corrosion oxide film.

[0014] Therefore, the present invention employs the above-mentioned one-way transmission component, which has the following beneficial effects: the locking groove includes a transmission part, a transition part, and a locking part arranged sequentially along the circumferential direction. The bottom of the locking part is inclined, and the angle between the bottom of the locking part and the groove wall of the locking part is an acute angle, so that the bottom of the locking part and the groove wall lock and position the roller in the elastic switching component, thereby increasing the contact area and contact pressure in the locking state and improving the locking performance.

[0015] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a unidirectional transmission component structure according to the present invention; Figure 2 This is a schematic diagram of the locking groove structure of the present invention; Figure 3 This is a schematic diagram of the unidirectional rotating outer ring structure in both forward and reverse rotation states of the present invention; Figure 4 This is a schematic diagram of the adjusting bolt structure of the present invention.

[0017] Figure Labels 1. One-way locking bearing; 11. One-way rotating outer ring; 12. Fixed shaft; 13. Locking groove; 131. Transmission part; 132. Transition part; 133. Locking part; 14. Elastic switching assembly; 141. Roller; 142. Spring; 143. Adjusting bolt; 2. Transmission pulley; 3. Reinforced sealed bearing; 4. Dustproof baffle; 5. Adjusting baffle; 6. Side plate. Detailed Implementation

[0018] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing the invention 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 invention. In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0019] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0020] Example 1 like Figure 1 As shown, a one-way transmission assembly includes a one-way locking bearing 1 and a transmission pulley 2. The one-way locking bearing 1 allows free rotation in one direction, while locking in the opposite direction to transmit torque. The one-way locking bearing 1 includes a one-way rotating outer ring 11 and a fixed shaft 12. The transmission pulley 2 is interference-fitted with the one-way rotating outer ring 11. The circumferential side of the fixed shaft 12 has several equally spaced locking grooves 13. An elastic switching component 14 is provided within the locking grooves 13, such as... Figure 2 As shown, the locking groove 13 includes a transmission part 131, a transition part 132, and a locking part 133 arranged sequentially along the circumference. The bottom of the locking part 133 and the groove wall of the locking part 133 form an acute angle, so that the bottom of the locking part 133 and the groove wall of the locking part 133 lock and position the roller 141 in the elastic switching assembly 14. In this embodiment, the angle between the bottom of the locking part 133 and the groove wall of the locking part 133 is 84°. The elastic switching assembly 14 of this embodiment includes a roller 141 and a spring 142. One end of the spring 142 is installed on the inner wall of the transmission part 131, and the other end of the spring 142 is arranged opposite to the roller 141, continuously pushing the roller 141 towards the narrow part of the specially shaped groove to prepare for locking. The transition part 132 is straight, and the inclination angle of the transition part 132 is 30°. Chamfers are provided at the connection points of the two ends of the transition part 132 with the transmission part 131 and the locking part 133. The bottom of the groove of the locking part 133 and the bottom of the groove of the transmission part 131 are both inclined. The inclination angle of the bottom of the groove of the locking part 133 is 4° and the inclination angle of the bottom of the groove of the transmission part 131 is 3°. The lower end of the bottom of the groove of the locking part 133 and the lower end of the bottom of the groove of the transmission part 131 are respectively connected to the two ends of the transition part 132.

[0021] like Figure 3 As shown, the position of the roller 141 in the forward and reverse rotation of the unidirectional rotating outer ring 11 is such that, during forward rotation, the roller 141 is located in the transmission part 131 under the action of the spring 142, so that the unidirectional rotating outer ring 11 can rotate smoothly. The friction between the fixed shaft 12 and the unidirectional rotating outer ring 11 and the roller 141 is small, and the unidirectional rotating outer ring 11 can rotate freely relative to the fixed shaft 12, so that the power transmission is basically unimpeded.

[0022] During reverse rotation, or when the relative speed between the fixed shaft 12 and the unidirectional rotating outer ring 11 reaches a certain value, the roller 141 is pushed against the locking part 133 under the action of friction. The roller 141 is wedged between the fixed shaft 12 and the unidirectional rotating outer ring 11, thereby locking the fixed shaft 12 and the unidirectional rotating outer ring 11 into one unit, preventing relative movement, and realizing unidirectional power transmission, that is, only power can be transmitted in a specific direction, and reverse movement is prevented. In the locked state, the inner wall and bottom of the locking part 133 simultaneously apply pressure to the roller 141, increasing the contact area and contact pressure, and improving the locking performance.

[0023] Reinforced sealed bearings 3 (sealed deep groove ball bearings) are installed on the fixed shafts 12 on both sides of the locking groove 13. The two sealed deep groove ball bearings used together significantly increase the load-bearing capacity of the entire assembly. The deep groove ball bearings, located on both sides of the roller 141 one-way bearing and self-sealed, effectively protect the roller 141 one-way bearing from external environmental contamination, extending the overall service life of the assembly. Dustproof baffles 4 are installed on the outer fixed shaft 12 of the reinforced sealed bearing 3 to prevent dust from entering the assembly, while adjusting baffles 5 are installed on the inner fixed shaft 12 of the reinforced sealed bearing 3 to limit its axial position. Side flanges 6 are provided on both sides of the locking groove 13 to ensure a seal.

[0024] The transmission pulley 2 has a belt groove on its outer side, and an end cap is provided at one end of the transmission pulley 2. The inner wall of the locking groove 13 and the outer side of the transmission pulley 2 are both provided with an anti-corrosion oxide film, which improves the overall rust and corrosion resistance and improves the appearance. It also has the advantages of relatively low cost and almost no change to the workpiece size.

[0025] Example 2 The difference between this embodiment and Embodiment 1 is that the angle between the bottom of the groove of the locking part 133 and the groove wall of the locking part 133 is 82°.

[0026] Example 3 The difference between this embodiment and Embodiment 1 is that the angle between the bottom of the groove of the locking part 133 and the groove wall of the locking part 133 is 86°.

[0027] The above embodiment was tested by fixing the fixed shaft 12 on the test bench and connecting the transmission pulley 2 to the output shaft of the motor. The motor rotated in the reverse direction at a low speed of 5 rpm (triggering the locking direction), and the torque was gradually applied until the roller 141 was fully wedged (the motor speed dropped to 0). The initial locking torque at this time was recorded. The reverse rotation state was maintained, and the load was continuously applied to the design maximum load (radial load 3kN). The stable locking torque (maintained for 30s without slippage) was recorded. Multiple tests were conducted and the average value was calculated. The test results are shown in Table 1.

[0028] Table 1 Test results of three examples

[0029] When the included angle is 86°, roller 141 is prone to slippage due to insufficient contact pressure. When the included angle is 82°, although the contact pressure is large, the contact area between roller 141 and the groove wall is small, and the torque increase is limited. As can be seen from the table above, when the included angle is 84°, both the initial locking torque and the stable locking torque are higher than the values ​​of the other two included angles, and the locking performance reliability is optimal.

[0030] Example 4 The difference between this embodiment and Embodiment 1 is that: the inner wall of the transmission part 131 is provided with a mounting thread groove, and an adjusting bolt 143 is provided in the mounting thread groove, such as... Figure 4 As shown, one end of the spring 142 is fixed to the top of the adjusting bolt 143. This facilitates the adjustment of the spring 142's position when its performance deteriorates after prolonged use, and also facilitates the assembly and disassembly of the spring 142.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A unidirectional transmission assembly, characterized in that: It includes a one-way locking bearing and a drive pulley. The one-way locking bearing includes a one-way rotating outer ring and a fixed shaft. The drive pulley is connected to the one-way rotating outer ring. The circumferential side of the fixed shaft has several equally spaced locking grooves. An elastic switching component is installed in the locking groove. The locking groove includes a transmission part, a transition part and a locking part arranged sequentially along the circumferential direction. The bottom of the locking part is inclined, and the angle between the bottom of the locking part and the groove wall of the locking part is an acute angle, so that the bottom of the locking part and the groove wall lock and position the roller in the elastic switching component.

2. The unidirectional transmission assembly according to claim 1, characterized in that: The angle between the bottom of the locking part and the groove wall of the locking part is 82°-86°.

3. A unidirectional transmission assembly according to claim 2, characterized in that: The transition section is straight, with an inclination angle of 30°, and chamfers are provided at the connection points between the two ends of the transition section and the transmission and locking sections.

4. A unidirectional transmission assembly according to claim 3, characterized in that: The bottom of the locking part has an inclination angle of 4°, and the bottom of the transmission part has an inclination angle of 3°. The bottom of the locking part and the bottom of the transmission part are respectively connected to the two ends of the transition part.

5. A unidirectional transmission assembly according to claim 4, characterized in that: Reinforced sealed bearings are installed on the fixed shafts on both sides of the locking groove. Dustproof baffles are installed on the fixed shafts on the outer side of the reinforced sealed bearings, and adjusting baffles are installed on the fixed shafts on the inner side of the reinforced sealed bearings to limit the axial position of the reinforced sealed bearings.

6. A unidirectional transmission assembly according to claim 5, characterized in that: The locking groove is provided with baffles on both sides to achieve a seal.

7. A unidirectional transmission assembly according to claim 6, characterized in that: The outer side of the transmission pulley has a belt groove.

8. A unidirectional transmission assembly according to claim 7, characterized in that: The flexible switching assembly includes a roller and a spring. One end of the spring is mounted on the inner wall of the transmission part, and the other end of the spring is positioned opposite the roller.

9. A unidirectional transmission assembly according to claim 8, characterized in that: The inner wall of the transmission part is provided with a mounting thread groove, and an adjusting bolt is installed in the mounting thread groove. One end of the spring is fixed to the top of the adjusting bolt.

10. A unidirectional transmission assembly according to claim 9, characterized in that: The inner wall of the locking groove and the outer side of the transmission pulley are both covered with an anti-corrosion oxide film.

Images