An integrated pulley

Abstract

The utility model relates to mechanical transmission technical field discloses an integral type belt wheel, including the main body mechanism for realizing transmission to power, the main body mechanism inner wall fixed mounting is used for driving main body synchronous rotation's transmission mechanism, the main body mechanism inner wall is provided with the fixed establishment for fixing integral assembly, the main body mechanism includes belt wheel, the belt wheel inner wall fixedly connected with positioning key. The utility model sets up the main body mechanism, and the belt wheel is integrally formed through powder metallurgy, and positioning key and key groove realize the double positioning of transmission shaft in cooperation, eliminate traditional split connection gap, greatly promote the connection stability of belt wheel and axle, avoid the slip deviation when power transmission, promote transmission efficiency and reliability, the slope design of positioning key is convenient for assembly guide positioning, reduces the installation resistance, and the integrated structure strengthens the overall strength and service life, and the power transmission performance is optimized.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission technology, specifically to an integrated pulley. Background Technology

[0002] In the automotive industry, efficient and stable power transmission is crucial. As automotive components that work in conjunction with synchronous belts or belts to transmit power, the performance of pulleys directly affects the operation of the automotive power system. Traditional pulleys suffer from assembly errors during assembly, leading to poor power transmission stability and affecting the reliability and service life of the vehicle. As automobiles develop towards lightweight and high-performance designs, higher requirements are placed on the weight, strength, wear resistance, and transmission efficiency of pulleys. In addition, the limited space in the automotive engine compartment also imposes strict standards on the compactness of the pulley structure. Therefore, reliable integrated pulleys have become an urgent need in the automotive component industry.

[0003] For example, CN221474768U discloses an integrated polishing machine pulley, comprising: a pulley body, a fixing key, a transmission seat, and a transmission shaft. A pad is provided in the center of the top surface of the pulley body, and a fixing post is provided on the top surface of the pulley body, with the fixing post positioned around the pad. An opening penetrating the pulley body is provided in the center of the pad, through which the transmission shaft passes and is connected to the pulley body via the fixing key. The fixing post has a fixing screw hole, and the transmission seat has a transmission screw hole matching the size of the fixing screw hole. Screws pass through both the fixing screw hole and the transmission screw hole to connect the pulley body and the transmission seat. This utility model not only has a simple structure, but its integrated structure also facilitates user installation, eliminating the need for repeated disassembly and alignment of the recess, thus simplifying the installation process. Furthermore, the integrated structure provides a more secure fixation after installation, preventing screw detachment and improving the overall stability and balance of the pulley.

[0004] However, in traditional mechanical transmission structures, pulleys, gears, and shafts are usually connected by separate flat keys and keyways. From a connection performance perspective, flat keys and keyways are separate components, making it difficult to achieve a perfectly precise fit during assembly. This results in weak overall connectivity and insufficient stability, directly causing significant power loss and poor transmission efficiency during transmission. Moreover, during equipment operation, due to the unstable connection, the entire assembly is prone to separation or displacement, requiring adjustments or even replacements. This not only involves cumbersome procedures but also consumes a lot of time, severely reducing equipment efficiency and causing numerous inconveniences to production operations. Therefore, those skilled in the art provide an integrated pulley to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to provide an integrated pulley, which solves the problem that in the existing technology, the traditional pulley, gear and shaft are connected by separate flat keys and keyways, which has weak connection and is not stable enough, resulting in poor power transmission. In addition, they are prone to separation and displacement during operation, which requires adjustment and replacement, which consumes time and reduces work efficiency.

[0006] This utility model provides the following technical solution: an integrated pulley, including a main body mechanism for transmitting power, a transmission mechanism for driving the main body to rotate synchronously is fixedly installed on the inner wall of the main body mechanism, and a fixing mechanism for fixing the overall component is provided on the inner wall of the main body mechanism.

[0007] As a preferred embodiment of the above technical solution, the main body includes a pulley, a positioning key is fixedly connected to the inner wall of the pulley, keyways are provided on both sides of the inner wall of the pulley near the positioning key, and the outer wall of the positioning key is provided with an inclined surface.

[0008] As a preferred embodiment of the above technical solution, the inner wall of the pulley is provided with an insertion hole, a fixing block is fixedly connected to the inner wall of the insertion hole, a locking pin is slidably connected to the inner wall of the fixing block, and a spring is sleeved on the outer wall of the locking pin.

[0009] As a preferred embodiment of the above technical solution, the inner wall of the pulley is rotatably connected to a pin, the outer wall of the pin is provided with a groove, the groove engages with a positioning key, and the inside of the pin is provided with a locking hole, the locking pin engages with the locking hole.

[0010] As a preferred embodiment of the above technical solution, a stop block is fixedly connected to the inner wall of the socket, one end of the spring is fixedly connected to the outer wall of the fixed block, and the other end of the spring is fixedly connected to the outer wall of the stop block.

[0011] As a preferred embodiment of the above technical solution, the pulley has an insertion hole inside, and the locking pin is slidably connected inside the insertion hole.

[0012] As a preferred embodiment of the above technical solution, a triangular mark is fixedly connected to the outer wall of the pulley.

[0013] As a preferred embodiment of the above technical solution, the top of the locking pin is provided with a cross groove, which is embedded in the inner wall of the pulley and flush with the outer wall surface of the pulley.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This utility model features a main structure with a pulley integrally formed by powder metallurgy. The positioning key and keyway work together to achieve dual positioning with the drive shaft, eliminating the gap of traditional separate connections, greatly improving the connection stability between the pulley and the shaft, avoiding slippage and offset during power transmission, and improving transmission efficiency and reliability. The beveled design of the positioning key facilitates assembly guidance and positioning, reduces installation resistance, and the integrated structure enhances overall strength and service life, optimizing power transmission performance.

[0015] Based on the above-mentioned beneficial effects, this utility model is equipped with a fixing mechanism. Through the elastic cooperation of the locking pin and the spring, the pulley and the drive shaft can be quickly locked and disassembled without the need for additional tools, which greatly improves the efficiency of disassembly and assembly. The limiting function of the insertion hole and the fixing block prevents the locking pin from falling off and shifting, ensuring the connection tightness and enhancing the stability of power transmission. The automatic reset function of the spring makes the operation convenient. The overall design optimizes the assembly process and improves the stability and reliability of use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an integrated pulley; Figure 2 A schematic diagram of a pin structure for an integrated pulley transmission mechanism; Figure 3 This is a schematic diagram of the pulley connection in the main structure of an integrated pulley system; Figure 4 A schematic diagram of the inclined plane section of the main body mechanism of an integrated pulley; Figure 5 This is a schematic diagram of a locking pin connection for a fixed mechanism of an integrated pulley.

[0017] In the diagram: 1. Main body; 2. Fixing mechanism; 3. Transmission mechanism; 4. Triangular marker; 11. Pulley; 12. Keyway; 13. Positioning key; 14. Insertion hole; 15. Angled surface; 21. Locking pin; 22. Fixing block; 23. Stop block; 24. Cross groove; 25. Spring; 31. Pin; 32. Slot; 33. Locking hole. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0019] Please see Figures 1-5 As shown, this utility model provides a technical solution: an integrated pulley, including a main body mechanism 1 for transmitting power, a transmission mechanism 3 for driving the main body to rotate synchronously fixedly installed on the inner wall of the main body mechanism 1, and a fixing mechanism 2 for fixing the overall component on the inner wall of the main body mechanism 1.

[0020] The main body 1 serves as the core power transmission component, achieving power transmission through cooperation with a synchronous belt or belt. The transmission mechanism 3 is fixedly installed on the inner wall of the main body 1, driving the main body 1 to rotate synchronously and ensuring efficient power transmission from the shaft system to the pulley 11. The fixing mechanism 2 is set on the inner wall of the main body 1, which can firmly fix the entire component to the transmission shaft, avoiding the loosening and misalignment problems that are prone to occur in traditional split connections. The fixing mechanism 2 ensures a reliable connection between the pulley 11 and the shaft. The transmission mechanism 3 achieves lossless power transmission. The main body 1 transmits power to subsequent components through the engagement of the pulley groove with the transmission belt. The integrated design of the overall structure eliminates the assembly gap of the split connection, improves the stability and efficiency of power transmission, reduces the risk of separation and misalignment during operation, and reduces the maintenance frequency.

[0021] As one implementation method in this embodiment, please refer to Figures 1-4 As shown, the main body 1 includes a pulley 11, a positioning key 13 is fixedly connected to the inner wall of the pulley 11, keyways 12 are provided on both sides of the inner wall of the pulley 11 near the positioning key 13, and an inclined surface 15 is provided on the outer wall of the positioning key 13.

[0022] The pulley 11 is produced by powder metallurgy. The locating key 13 on the inner wall of the pulley 11 works in conjunction with the keyways 12 on both sides to precisely mate with the drive shaft. The keyways 12 can accommodate the key structure on the drive shaft, while the locating key 13 is embedded in the corresponding slot on the shaft. Through this double cooperation, the relative rotation between the pulley and the shaft is restricted. The inclined surface 15 on the outer wall of the locating key 13 is designed to facilitate guidance during assembly, allowing the pulley 11 to engage with the drive shaft more smoothly and reducing installation resistance. This structure, through the integrated design of the pulley 11, locating key 13, and keyway 12, eliminates the gap of traditional separate connections, enhances the connection stability between the pulley 11 and the shaft, ensures no slippage or offset during power transmission, and improves the overall transmission efficiency and reliability.

[0023] As one implementation method in this embodiment, please refer to Figures 2-5 As shown, the inner wall of the pulley 11 has an insertion hole 14, the inner wall of the insertion hole 14 is fixedly connected to a fixing block 22, the inner wall of the fixing block 22 is slidably connected to a locking pin 21, and the outer wall of the locking pin 21 is fitted with a spring 25.

[0024] The insertion hole 14 on the inner wall of the pulley 11 is the core mounting position of the fixing mechanism 2. The internal fixing block 22 provides sliding support for the locking pin 21. When the pulley 11 is assembled with the drive shaft, the locking pin 21 is compressed by the shaft and compresses the spring 25. When the corresponding locking hole 33 on the shaft is aligned with the insertion hole 14, the spring 25 returns to its original position and pushes the locking pin 21 into the locking hole 33 of the shaft, realizing the quick locking of the pulley 11 and the shaft. By twisting the locking pin 21 in the opposite direction, the spring 25 releases its elastic potential energy, and the locking pin 21 and the locking hole 33 can be disassembled. This structure, through the elastic cooperation of the locking pin 21 and the spring 25, not only ensures the tightness of the connection between the pulley 11 and the drive shaft, but also prevents the locking pin 21 from falling off or shifting by the limiting effect of the insertion hole 14 and the fixing block 22. No additional tools are required during assembly. The locking and disassembly are automatically completed by the elastic force of the spring 25, which greatly improves the efficiency of assembly and disassembly, and enhances the stability during power transmission.

[0025] As one implementation method in this embodiment, please refer to Figures 2-4 As shown, a pin 31 is rotatably connected to the inner wall of the pulley 11. A groove 32 is provided on the outer wall of the pin 31. The groove 32 engages with the positioning key 13. A locking hole 33 is provided inside the pin 31. The locking pin 21 engages with the locking hole 33.

[0026] The pin 31 on the inner wall of the pulley 11 is a key component of the transmission mechanism 3. It can rotate synchronously with the pulley 11. The groove 32 on the outer wall of the pin 31 engages with the positioning key 13 on the inner wall of the pulley 11 to form a circumferential fixation. This ensures that when the pulley 11 rotates, it can drive the pin 31 to rotate synchronously through the positioning key 13, thus realizing the transmission of power from the pulley 11 to the pin 31. The locking hole 33 inside the pin 31 cooperates with the locking pin 21. When the pulley 11 and the shaft are assembled in place, the locking pin 21 is engaged in the locking hole 33 under the action of the spring 25, axially locking the pin 31 and the pulley 11 to prevent them from sliding relative to each other. This structure forms a double constraint through the circumferential limitation of the groove 32 and the positioning key 13, and the axial fixation of the locking pin 21 and the locking hole 33. This not only ensures the synchronicity of power transmission, but also enhances the stability of the overall connection, avoids loosening or deviation during operation, and improves transmission efficiency and reliability.

[0027] As one implementation method in this embodiment, please refer to Figure 5 As shown, a stop block 23 is fixedly connected to the inner wall of the socket 14, one end of the spring 25 is fixedly connected to the outer wall of the fixing block 22, and the other end of the spring 25 is fixedly connected to the outer wall of the stop block 23.

[0028] The stop 23 on the inner wall of the socket 14 cooperates with the fixing block 22 to provide fixed support for the spring 25 at both ends. In its natural state, the spring 25 pushes the locking pin 21 to extend. During assembly, the locking pin 21 is compressed, causing the spring 25 to contract. The stop 23 restricts the excessive deformation of the spring 25 and ensures the stability of the elastic force. This structure enhances the installation reliability of the spring 25 through double-point fixing and ensures that the locking and unlocking actions of the locking pin 21 are precise and controllable.

[0029] As one implementation method in this embodiment, please refer to Figure 5 As shown, the pulley 11 has an insertion hole 14 inside, and the locking pin 21 is slidably connected inside the insertion hole 14.

[0030] The insertion hole 14 inside the pulley 11 provides a sliding channel for the locking pin 21. During assembly, the locking pin 21 slides along the inner wall of the insertion hole 14 and retracts after being squeezed by external force. Once aligned with the corresponding structure of the shaft, the locking pin 21 resets and snaps into the shaft, thus fixing the pulley 11 to the shaft. The insertion hole 14 restricts the offset of the locking pin 21, ensuring the stability of the locking and helping the pulley 11 to transmit power stably.

[0031] As one implementation method in this embodiment, please refer to Figure 2 As shown, a triangular mark 4 is fixedly connected to the outer wall of pulley 11.

[0032] The triangular mark 4 on the outer wall of pulley 11 serves as the assembly reference. During installation, the relative position of pulley 11 with the shaft and drive belt can be quickly located through this mark to avoid misalignment. Subsequent maintenance can also use this to determine whether pulley 11 has shifted, ensuring the accuracy of power transmission.

[0033] As one implementation method in this embodiment, please refer to Figure 2 and Figure 5 As shown, the top of the locking pin 21 has a cross groove 24, which is embedded in the inner wall of the pulley 11 and flush with the outer wall surface of the pulley 11.

[0034] The cross groove 24 at the top of the locking pin 21 makes it easy to operate the locking pin 21 with tools. During assembly, the tool can be inserted into the cross groove 24 to press the locking pin 21 to retract. Its design is flush with the inner wall of the pulley 11 to avoid the protruding part from interfering with the operation of the pulley 11, which ensures both ease of operation and a compact and stable overall structure.

[0035] Working principle: The integrated pulley 11 achieves efficient power transmission through the main body mechanism 1, the fixing mechanism 2 and the transmission mechanism 3. In the main body mechanism 1, the pulley 11 is the core component. Its outer wall triangular mark 4 is used for quick positioning during assembly to ensure precise alignment with the transmission belt and shaft system. The inner wall keyway 12 cooperates with the positioning key 13. Guided by the inclined surface 15 of the positioning key 13, it achieves initial circumferential positioning with the transmission shaft.

[0036] The pin 31 engages with the positioning key 13 through the outer wall groove 32 and rotates synchronously with the pulley 11, transmitting power to the shaft system to form a stable transmission chain. The locking is achieved by the interaction force generated by the spring 25 fixed at both ends to the fixing block 22 and the stop block 23, which pushes the locking pin 21 into the locking hole 33 of the pin 31 to complete the axial locking. The cross groove 24 at the top of the locking pin 21 is convenient for tool operation during disassembly and assembly, and is flush with the surface of the pulley 11, so it does not affect its operation.

[0037] The overall design eliminates the gap problem of traditional split connections, achieving efficient power transmission while taking into account both ease of assembly and disassembly and operational stability.

[0038] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. An integrated pulley, characterized in that: It includes a main body mechanism (1) for transmitting power, a transmission mechanism (3) for driving the main body to rotate synchronously is fixedly installed on the inner wall of the main body mechanism (1), and a fixing mechanism (2) for fixing the overall components is provided on the inner wall of the main body mechanism (1). The main body (1) includes a pulley (11), a positioning key (13) is fixedly connected to the inner wall of the pulley (11), and keyways (12) are provided on both sides of the inner wall of the pulley (11) near the positioning key (13). An inclined surface (15) is provided on the outer wall of the positioning key (13).

2. The integrated pulley according to claim 1, characterized in that: The inner wall of the pulley (11) is provided with a socket (14), and a fixing block (22) is fixedly connected to the inner wall of the socket (14). A locking pin (21) is slidably connected to the inner wall of the fixing block (22), and a spring (25) is sleeved on the outer wall of the locking pin (21).

3. The integrated pulley according to claim 2, characterized in that: The inner wall of the pulley (11) is rotatably connected to a pin (31), and the outer wall of the pin (31) is provided with a slot (32). The slot (32) engages with the positioning key (13). The pin (31) is provided with a locking hole (33), and the locking pin (21) engages with the locking hole (33).

4. The integrated pulley according to claim 2, characterized in that: A stop block (23) is fixedly connected to the inner wall of the socket (14), one end of the spring (25) is fixedly connected to the outer wall of the fixing block (22), and the other end of the spring (25) is fixedly connected to the outer wall of the stop block (23).

5. The integrated pulley according to claim 3, characterized in that: The pulley (11) has an insertion hole (14) inside, and the locking pin (21) is slidably connected inside the insertion hole (14).

6. The integrated pulley according to claim 1, characterized in that: A triangular mark (4) is fixedly connected to the outer wall of the pulley (11).

7. The integrated pulley according to claim 2, characterized in that: The top of the locking pin (21) is provided with a cross groove (24), which is embedded in the inner wall of the pulley (11) and flush with the outer wall surface of the pulley (11).

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