Buffer pulley and buffer wheel system mechanism having the same

Abstract

The present invention discloses a buffer pulley and a buffer wheel system mechanism with a buffer pulley, comprising a buffer wheel seat and a buffer wheel outer ring coaxially arranged inside and outside, two cylinders are arranged in the annular gap between the outer ring of the buffer wheel seat and the inner ring of the buffer wheel outer ring, the cylinder bodies of the two cylinders are respectively fixed to the buffer wheel outer ring, a piston is slidably arranged in the arc-shaped cavity of the cylinder body of each cylinder, an arc-shaped piston rod is arranged at one end of the piston, the end of the arc-shaped piston rod extends outward from the cylinder body end of the cylinder and is located in the annular gap, the center line of the arc-shaped piston rod and the center line of the arc-shaped cavity are both concentric with the buffer pulley, two lugs are arranged on both sides of the buffer wheel seat, the arc-shaped piston rod and the lugs are hinged by the pins on the lugs, and a circumferential buffer spring is arranged in the gap between the outer end of the arc-shaped piston rod of each cylinder and the cylinder body of another cylinder. The advantages of the present invention are: it can quickly release and decompose transient impact force, and the buffering effect is significant.

Description

Technical Field

[0001] The invention relates to the technical field of transmission mechanisms, and in particular to a buffer pulley and a buffer wheel train mechanism having the buffer pulley. Background Art

[0002] The existing transmission system usually uses an ordinary pulley device, and the pulley is also an ordinary pulley without a buffer mechanism. This structure has the following defects:

[0003] 1. When using an ordinary pulley device, the transmission belt will receive a large impact force when the driving wheel applies transient force, the transmission belt will slip and make abnormal noises, or even age and break, posing a great safety hazard.

[0004] 2. Using ordinary pulley devices cannot eliminate vibration, which will affect the reliability of gear train components. Long-term vibration will cause component failure. At the same time, it will also reduce the shock absorption ability of the power system, increase the vibration amplitude, and reduce durability and reliability.

[0005] 3. The use of ordinary pulley devices requires too high alignment between the wheel systems, which is more prone to abnormal noise and abnormal wear of the belt, and the service life of the belt and accessory bearings is greatly reduced.

[0006] 4. When using ordinary pulley devices, the transient load effect of the impact force on the accessories cannot be quickly eliminated, the service life of the accessories is significantly reduced, and the cost of use will increase a lot. Summary of the invention

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a buffer pulley and a buffer wheel train mechanism having the buffer pulley.

[0008] The present invention is achieved through the following technical solutions:

[0009] A buffer pulley comprises a buffer wheel seat and a buffer wheel outer ring which are coaxially arranged inside and outside, an annular gap is formed between the outer ring of the buffer wheel seat and the inner ring of the buffer wheel outer ring, two cylinders are arranged in the annular gap, the two cylinders are centrally symmetrically distributed relative to the center point of the buffer pulley, the cylinder bodies of the two cylinders are respectively fixed to the buffer wheel outer ring, an arc-shaped cavity is arranged inside the cylinder body of each cylinder, a piston is slidably arranged in the arc-shaped cavity, an arc-shaped piston rod is arranged at one end of the piston, the end of the arc-shaped piston rod protrudes outward from the cylinder body end of the cylinder and is located in the annular gap, the center line of the arc-shaped piston rod, the arc The center lines of the shaped cavities are concentric with the buffer pulleys, two lugs are provided on both sides of the buffer wheel seat, the two lugs are centrally symmetrically distributed relative to the center point of the buffer pulley, the outer ends of the two arc-shaped piston rods corresponding to the two cylinders pass through the two lugs respectively, and the arc-shaped piston rods and the lugs are hinged by the pins on the lugs, the axis lines of the two pins are parallel to the axis line of the buffer pulley, and a circumferential buffer spring is provided in the gap between the outer end of the arc-shaped piston rod of each cylinder and the cylinder body of another cylinder, and the two ends of the circumferential buffer spring are limited by the end of the arc-shaped piston rod and the cylinder body of the cylinder respectively.

[0010] Furthermore, the lugs are respectively provided with limit baffles at both ends of the corresponding pin shaft, the distance between the two limit baffles is greater than the diameter of the arc piston rod, the arc piston rod can slide along the pin shaft, and axial buffer springs are respectively mounted on both sides of the corresponding arc piston rod on the pin shaft, and the two ends of the axial buffer springs are respectively limited by the arc piston rod and the limit baffles.

[0011] Furthermore, a pressure relief channel is formed on the side wall of the cylinder body at an end extending away from the arc-shaped piston rod, and the pressure relief channel is communicated with the arc-shaped cavity of the cylinder. The pressure relief channel is a stepped hole which is larger on the outside and smaller on the inside. A pressure relief valve is arranged in the large hole end of the pressure relief channel. The pressure relief valve includes a pressure relief spring, a pressure relief valve plate, and a pressure relief valve cover. The pressure relief valve cover is arranged outside the large hole end of the pressure relief channel. A pressure relief valve plate is placed between the pressure relief valve cover and the pressure relief spring. A pressure relief hole is formed on the pressure relief valve cover. The pressure relief spring presses the pressure relief valve plate against the pressure relief valve cover so that the pressure relief valve plate seals the pressure relief hole on the pressure relief valve cover.

[0012] Furthermore, the pressure relief valve cover is threadedly connected to the pressure relief channel.

[0013] Furthermore, the buffer wheel seat includes a wheel seat body, a buffer ring, and a mounting ring which are coaxially mounted in sequence from the inside to the outside. The buffer ring is provided with a plurality of buffer holes which penetrate axially, and two lugs are arranged on the outer ring of the mounting ring.

[0014] Furthermore, a protruding elastic positioning pin is provided on the end surface of the buffer wheel seat.

[0015] Furthermore, a mounting hole is provided on the buffer wheel seat.

[0016] The present invention also provides a buffer wheel system mechanism with a buffer pulley, wherein the buffer wheel system mechanism includes a buffer pulley and multiple driven pulleys, wherein the buffer pulley and the multiple driven pulleys are connected by a transmission belt, and a tensioner is arranged between the buffer pulley and the adjacent driven pulley, and the tensioner is used to tension the transmission belt, and is characterized in that the buffer pulley is a buffer pulley as described above.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. The buffer pulley provided by the present invention is provided with two arc-shaped cylinders in the annular gap between the buffer wheel seat and the outer ring of the buffer wheel. The cylinder body of the cylinder is connected to the outer ring of the buffer wheel, and the arc-shaped piston rod of the cylinder is connected to the buffer wheel seat. The arc-shaped cylinder and the arc-shaped piston rod have large stroke and space. When applied to the buffer wheel system mechanism, it is more convenient to transmit the impact force during transient force, and can quickly release and decompose the transient impact force. The buffering effect is significant, so that each component in the transmission system has good reliability, low component failure rate, and good stability of the transmission system.

[0019] 2. The buffer pulley provided by the present invention is provided with a circumferential buffer spring in the gap between the outer end of the arc-shaped piston rod of each cylinder and the cylinder body of another cylinder. When the arc-shaped piston rod rebounds quickly, the circumferential buffer spring will quickly buffer and eliminate the impact force, thereby realizing the circumferential shock absorption of the buffer pulley and improving the service life of the arc-shaped piston rod.

[0020] 3. The buffer pulley provided by the present invention has axial buffer springs respectively mounted on its pin shaft on both sides of the corresponding arc-shaped piston rod, so that the axial position between the buffer wheel seat and the buffer wheel outer ring can be elastically adjusted, thereby realizing axial buffering of the buffer pulley. Even if the buffer pulley is not aligned with other driven wheels and the transmission belt, the buffer wheel system can still work normally, and under stress, it compensates for the alignment error caused by the installation of components, avoids abnormal cutting noise, and ensures the service life of the transmission belt and various components.

[0021] 4. The buffer pulley provided by the present invention has a buffer ring on its buffer wheel seat. When the lateral vibration of the buffer pulley is too large, the buffer ring can effectively provide buffering.

[0022] 5. The buffer pulley provided by the present invention has a pressure relief valve cover and a cylinder body of the cylinder in threaded connection. The preload force of the pressure relief spring can be adjusted by rotating the pressure relief valve cover, thereby adjusting the opening pressure of the pressure relief valve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional view of a buffer pulley of the present invention.

[0024] Figure 2 It is a top view of the buffer pulley of the present invention.

[0025] Figure 3 It is a longitudinal sectional view of the buffer pulley of the present invention cut from the axial buffer spring.

[0026] Figure 4 It is a longitudinal sectional view of the buffer pulley of the present invention cut away from the pressure relief valve.

[0027] Figure 5 yes Figure 4 Enlarged view of point A.

[0028] Figure 6 It is a cross-sectional view of the buffer pulley of the present invention.

[0029] Figure 7 It is a structural schematic diagram of the buffer gear train mechanism of the present invention.

[0030] Numbers in the figure: 1 buffer pulley, 2 buffer wheel seat, 3 buffer wheel outer ring, 4 cylinder, 5 arc-shaped cavity, 6 piston, 7 arc-shaped piston rod, 8 wheel seat body, 9 buffer ring, 10 mounting ring, 11 buffer hole, 12 lug, 13 pin shaft, 14 circumferential buffer spring, 15 limit baffle, 16 axial buffer spring, 17 pressure relief channel, 18 pressure relief valve, 19 pressure relief spring, 20 pressure relief valve plate, 21 pressure relief valve cover, 22 pressure relief hole, 23 mounting hole, 24 elastic locating pin, 25 driven pulley, 26 transmission belt, 27 tensioner. DETAILED DESCRIPTION

[0031] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0032] See also Figures 1 to 6The present embodiment discloses a buffer pulley, comprising a buffer wheel seat 2 and a buffer wheel outer ring 3 which are coaxially arranged inside and outside. An annular gap is formed between the outer ring of the buffer wheel seat 2 and the inner ring of the buffer wheel outer ring 3. Two cylinders 4 are arranged in the annular gap. The two cylinders 4 are centrally symmetrically distributed relative to the center point of the buffer pulley 1. The cylinder bodies of the two cylinders 4 are respectively fixed to the buffer wheel outer ring 3. An arc-shaped cavity 5 is arranged inside the cylinder body of each cylinder 4. A piston 6 is slidably arranged in the arc-shaped cavity 5. An arc-shaped piston rod 7 is arranged at one end of the piston 6. The end of the arc-shaped piston rod 7 extends outward from the end of the cylinder body of the cylinder 4 and is located in the annular gap. The center line of the arc-shaped piston rod 7 and the center line of the arc-shaped cavity 5 are both concentric with the buffer pulley 1. The buffer wheel seat 2 includes a wheel seat body 8, a buffer ring 9, and a mounting ring 10 which are coaxially mounted from the inside to the outside. The buffer ring 9 is tightly fitted with the wheel seat body 8 and the mounting ring 10 respectively. The wheel seat body 8 and the buffer ring 9, and the buffer ring 9 and the mounting ring 10 can be connected by keyways to achieve anti-rotation design. The buffer ring 9 can be a rubber buffer ring 9. The buffer ring 9 is provided with a plurality of buffer holes 11 that penetrate along the axial direction. Two lugs 12 are provided on both sides of the outer ring of the mounting ring 10. The two lugs 12 are relative to the buffer pulley 1. The center points are distributed symmetrically, the outer ends of the two arc-shaped piston rods 7 corresponding to the two cylinders 4 pass through two lugs 12 respectively, and the arc-shaped piston rod 7 and the lug 12 are hinged by the pin shaft 13 on the lug 12, the axis lines of the two pin shafts 13 are parallel to the axis line of the buffer pulley 1, and a circumferential buffer spring 14 is provided in the gap between the outer end of the arc-shaped piston rod 7 of each cylinder 4 and the cylinder body of another cylinder 4, and the two ends of the circumferential buffer spring 14 are limited by the end of the arc-shaped piston rod 7 and the cylinder body of the cylinder 4 respectively.

[0033] Specifically, the lug 12 is provided with limit baffles 15 at both ends of the corresponding pin shaft 13, the distance between the two limit baffles 15 is greater than the diameter of the arc-shaped piston rod 7, the arc-shaped piston rod 7 can slide along the pin shaft 13, and the pin shaft 13 is respectively provided with axial buffer springs 16 on both sides of the corresponding arc-shaped piston rod 7, and the two ends of the axial buffer spring 16 are respectively limited by the arc-shaped piston rod 7 and the limit baffles 15.

[0034] Specifically, a pressure relief channel 17 is formed on the side wall of the cylinder body of the cylinder 4 at one end extending away from the arc-shaped piston rod 7. The pressure relief channel 17 is connected to the arc-shaped cavity 5 of the cylinder 4. The pressure relief channel 17 is a stepped hole that is large outside and small inside. A pressure relief valve 18 is arranged in the large hole end of the pressure relief channel 17. The pressure relief valve 18 includes a pressure relief spring 19, a pressure relief valve plate 20, and a pressure relief valve cover 21. The pressure relief valve cover 21 is arranged outside the large hole end of the pressure relief channel 17, and the pressure relief valve cover 21 is threadedly connected to the pressure relief channel 17. A pressure relief valve plate 20 is placed between the pressure relief valve cover 21 and the pressure relief spring 19. A pressure relief hole 22 is formed on the pressure relief valve cover 21. The pressure relief spring 19 presses the pressure relief valve plate 20 against the pressure relief valve cover 21, so that the pressure relief valve plate 20 seals the pressure relief hole 22 on the pressure relief valve cover 21. The pressure relief valve 18 can be opened or closed according to the pressure difference between the air pressure in the arc-shaped cavity 5 of the cylinder 4 and the external atmospheric pressure.

[0035] The buffer wheel seat 2 is provided with a mounting hole 23, and is connected with other components through the mounting hole 23. A protruding elastic positioning pin 24 is provided on the end surface of the buffer wheel seat 2 to improve the installation positioning accuracy between the buffer wheel and other components during installation, thereby improving assembly efficiency.

[0036] When the buffer pulley 1 is subjected to an instantaneous, high-load impact force in the circumferential direction, the buffer wheel seat 2 and the buffer wheel outer ring 3 will have a tendency to rotate relative to each other. At this time, the arc piston rod 7 of the cylinder 4 will quickly expand and contract, and the arc piston rod 7 will slide back and forth along the arc cavity 5. In this process, the two circumferential buffer springs 14 will buffer and eliminate the impact force, reduce the impact on the arc piston rod 7, and increase the service life of the arc piston rod 7. After the impact force is released, under the action of the two circumferential buffer springs 14, the pistons 6 of the two cylinders 4 return to their original positions, and the buffer wheel seat 2 and the buffer wheel outer ring 3 are reset.

[0037] When the buffer pulley 1 is subjected to an instantaneous, high-load impact force along the axial direction, the arc-shaped piston rod 7 of the cylinder 4 will slide on the pin 13, and during this process, the two axial buffer springs 16 will buffer and eliminate the impact force. After the impact force is released, the arc-shaped piston rod 7 is reset under the action of the two axial buffer springs 16, and the buffer wheel seat 2 and the buffer wheel outer ring 3 are reset.

[0038] See also Figure 7 The present embodiment also discloses a buffer wheel train mechanism having a buffer pulley, wherein the buffer wheel train mechanism comprises a buffer pulley 1 and a plurality of driven pulleys 25, wherein the buffer pulley 1 and the plurality of driven pulleys 25 are connected by a transmission belt 26, and a tensioner 27 is arranged between the buffer pulley 1 and the adjacent driven pulley 25, and the tensioner 27 is used for tensioning the transmission belt 26, and the buffer pulley 1 is the buffer pulley 1 of the above-mentioned structure.

[0039] In specific application, the buffer wheel train mechanism is applied in the transmission system, the buffer wheel seat 2 of the buffer pulley 1 is installed together with the driving wheel of the transmission system, and the driven pulley 25 is installed together with the working part, and the power of the driving wheel is transmitted to the working part through the buffer wheel train mechanism. The buffer pulley 1 in the buffer wheel train mechanism can achieve circumferential buffering and axial buffering, which can solve the force buffering of the buffer wheel train mechanism in transient and high load conditions, and avoid abnormal damage to the transmission belt 26 and various components due to excessive force. This buffer pulley 1 can solve and eliminate the angular vibration and inertial force in the wheel train, as well as the problems such as the high alignment requirements of the wheel train increasing the matching difficulty of the wheel train and the high processing accuracy requirements of the components. At the same time, the response speed of the entire wheel train can also be rapidly improved.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A buffer pulley, characterized in that: The invention comprises a buffer wheel seat (2) and a buffer wheel outer ring (3) which are coaxially arranged inside and outside. An annular gap is formed between the outer ring of the buffer wheel seat (2) and the inner ring of the buffer wheel outer ring (3). Two cylinders (4) are arranged in the annular gap. The two cylinders (4) are centrally symmetrically distributed relative to the center point of the buffer pulley (1). The cylinder bodies of the two cylinders (4) are respectively fixed to the buffer wheel outer ring (3). An arc-shaped cavity (5) is arranged inside the cylinder body of each cylinder (4). A piston (6) is slidably arranged in the arc-shaped cavity (5). An arc-shaped piston rod (7) is arranged at one end of the piston (6). The end of the arc-shaped piston rod (7) protrudes outward from the cylinder body end of the cylinder (4) and is located in the annular gap. The center line of the arc-shaped piston rod (7) and the center line of the arc-shaped cavity (5) are both aligned with the buffer wheel outer ring (3). The pulley (1) is concentric with the center of the buffer wheel seat (2), and two lugs (12) are arranged on both sides of the buffer wheel seat (2). The two lugs (12) are centrally symmetrically distributed relative to the center point of the buffer pulley (1). The outer ends of the two arc-shaped piston rods (7) corresponding to the two cylinders (4) pass through the two lugs (12) respectively, and the arc-shaped piston rods (7) and the lugs (12) are hinged by the pins (13) on the lugs (12). The axis lines of the two pins (13) are parallel to the axis line of the buffer pulley (1). A circumferential buffer spring (14) is arranged in the gap between the outer end of the arc-shaped piston rod (7) of each cylinder (4) and the cylinder body of another cylinder (4). The two ends of the circumferential buffer spring (14) are respectively limited by the ends of the arc-shaped piston rod (7) and the cylinder body of the cylinder (4).

2. A buffer pulley according to claim 1, characterized in that: The lug (12) is provided with limit baffles (15) at both ends of the corresponding pin shaft (13), the distance between the two limit baffles (15) is greater than the diameter of the arc-shaped piston rod (7), the arc-shaped piston rod (7) can slide along the pin shaft (13), and the pin shaft (13) is provided with axial buffer springs (16) at both sides of the corresponding arc-shaped piston rod (7), and the two ends of the axial buffer spring (16) are limited by the arc-shaped piston rod (7) and the limit baffles (15).

3. A buffer pulley according to claim 1, characterized in that: A pressure relief hole (17) is formed on the cylinder body side wall of the cylinder (4) at one end extending away from the arc-shaped piston rod (7). The pressure relief hole (17) is connected to the arc-shaped cavity (5) of the cylinder (4). The pressure relief hole (17) is a stepped hole that is larger on the outside and smaller on the inside. A pressure relief valve (18) is arranged in the large hole end of the pressure relief hole (17). The pressure relief valve (18) includes a pressure relief spring (19), a pressure relief valve plate (20), and a pressure relief valve cover. (21), the pressure relief valve cover (21) is arranged outside the large hole end of the pressure relief channel (17), a pressure relief valve plate (20) is placed between the pressure relief valve cover (21) and the pressure relief spring (19), a pressure relief hole (22) is opened on the pressure relief valve cover (21), and the pressure relief spring (19) presses the pressure relief valve plate (20) against the pressure relief valve cover (21), so that the pressure relief valve plate (20) seals the pressure relief hole (22) on the pressure relief valve cover (21).

4. A buffer pulley according to claim 3, characterized in that: The pressure relief valve cover (21) is threadedly connected to the pressure relief channel (17).

5. A buffer pulley according to claim 1, characterized in that: The buffer wheel seat (2) comprises a wheel seat body (8), a buffer ring (9), and a mounting ring (10) which are coaxially mounted in sequence from the inside to the outside. The buffer ring (9) is provided with a plurality of buffer holes (11) which penetrate in the axial direction, and two lugs (12) are arranged on the outer ring of the mounting ring (10).

6. A buffer pulley according to claim 1, characterized in that: A protruding elastic positioning pin (24) is provided on the end surface of the buffer wheel seat (2).

7. The buffer pulley according to claim 1, characterized in that: The buffer wheel seat (2) is provided with a mounting hole (23).

8. A buffer wheel train mechanism with a buffer pulley, the buffer wheel train mechanism comprising a buffer pulley (1) and a plurality of driven pulleys (25), the buffer pulley (1) and the plurality of driven pulleys (25) being connected by a transmission belt (26), a tensioner (27) being arranged between the buffer pulley (1) and the adjacent driven pulley (25), the tensioner (27) being used to tension the transmission belt (26), characterized in that: The buffer pulley (1) is a buffer pulley as claimed in any one of claims 1 to 7.

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