Buffering noise reduction type balance shaft gear of motorcycle engine

Abstract

The invention relates to the technical field of balance shaft gears of motorcycle engines, in particular to a buffering noise reduction type balance shaft gear of a motorcycle engine, which comprises a balance shaft, a driven gear assembly, a driving gear and a crankshaft assembly, the balance shaft and driven gear assembly is formed by assembling a balance shaft driven gear assembly, a balance shaft assembly, a balance shaft left balancing weight, a third bearing, a fourth bearing, a woodruff key, a balance shaft right balancing weight, a gasket and a nut. The driving gear and crankshaft assembly is formed by assembling a driving gear, a crankshaft assembly, a first bearing, a second bearing and a connecting rod. When in use, the cylindrical damping rubber block is arranged between the balance gear center sleeve piece and the balance shaft driven gear, so that the balance shaft driven gear can play a role in damping and buffering under the condition that the balance shaft driven gear is subjected to impact force during speed change (acceleration or deceleration) after rotation.

Description

Technical Field

[0001] The invention relates to the technical field of motorcycle engine balance shaft gears, in particular to a buffered and noise-reducing balance shaft gear of a motorcycle engine. Background Art

[0002] When the motorcycle engine is working, it provides power to the vehicle. While transmitting power, it also generates large vibrations to the frame and body parts. The driver feels the vibration when gripping the steering handle with his hands, so a balance shaft gear device is added to the design of the motorcycle engine. Its function is to reduce the transmission of engine vibration to the vehicle, increase the service life of the motorcycle and its parts, and improve the comfort of motorcycle driving for the rider or driver. A large number of gears are used in the engine for transmission. The gear transmission is accurate and reliable, but the gear transmission will produce certain noise.

[0003] The existing motorcycle engine design is composed of a driving gear and a driven gear, a balance shaft, and a counterweight assembly. The driving gear and the driven gear are usually integrated (as shown below). Figure 1 ), gears generally have gear teeth, tooth grooves, end faces, normal faces, tooth top circles, tooth root circles, base circles and pitch circles. When two gears are meshed, the tooth top of one gear always enters the tooth root of the other gear. In order to prevent thermal expansion and to have space for storing lubricating oil, small holes are opened on the main surface of the gear to reduce weight. The balance shaft gear device is installed in the engine and is driven and transmitted by the gears on the engine crankshaft. The driven teeth of the balance shaft of this design generate greater noise when receiving power transmission, which is mainly caused by vibration when the gears transmit torque. The gear side clearance is the main source of vibration. Gears are also easily damaged, and the cost of replacing parts during maintenance is high. Therefore, the present invention provides a buffered and noise-reducing balance shaft gear for a motorcycle engine to solve the above-mentioned problems. Summary of the invention

[0004] The object of the present invention is to provide a balance shaft gear of a motorcycle engine capable of buffering and reducing noise, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A buffered noise-reducing balancing shaft gear for a motorcycle engine comprises a balancing shaft and a driven gear assembly and a driving gear and a crankshaft assembly, wherein the balancing shaft and the driven gear assembly are assembled from a balancing shaft driven gear assembly, a balancing shaft assembly, a balancing shaft left counterweight, a third bearing, a fourth bearing, a semicircular key, a balancing shaft right counterweight, a gasket and a nut, wherein the driving gear and the crankshaft assembly are assembled from a driving gear, a crankshaft assembly, a first bearing, a second bearing and a connecting rod, wherein the balancing shaft right counterweight comprises a second square keyway, a third cylindrical hole, a semicircular block and a heat dissipation hole, wherein the balancing shaft right counterweight is provided with a third cylindrical hole corresponding to the cylindrical surface of the balancing shaft driven gear, and the inner wall of the third cylindrical hole is provided with a second square keyway, wherein the balancing shaft right counterweight is provided with a semicircular block, and the balancing shaft right counterweight is provided with a plurality of heat dissipation holes, and the balancing shaft right counterweight is provided with a plurality of heat dissipation holes, wherein the balancing shaft right counterweight is provided with a plurality of heat dissipation holes, and the gravity effect is conveniently provided.

[0006] As a further scheme of the present invention, the balancing shaft assembly includes an intermediate step shaft, a balancing shaft left counterweight, a thread, a first bearing supporting cylindrical surface, a second bearing supporting cylindrical surface, a balancing shaft driven gear cylindrical surface and a first square keyway. The left end of the intermediate step shaft is provided with a first bearing supporting cylindrical surface, the right end of the intermediate step shaft is provided with a second bearing supporting cylindrical surface, the second bearing supporting cylindrical surface is provided with a left counterweight of the balancing shaft, the first bearing supporting cylindrical surface is provided with a third bearing, the second bearing supporting cylindrical surface is provided with a fourth bearing, the left end of the first bearing supporting cylindrical surface is provided with a balancing shaft driven gear cylindrical surface, the balancing shaft driven gear cylindrical surface is provided with a first square keyway, and a threaded connecting nut is provided on the balancing shaft driven gear cylindrical surface, and a corresponding nut is provided on the balancing shaft driven gear cylindrical surface. The balancing shaft assembly is easily formed by setting the intermediate step shaft, the balancing shaft left counterweight, the thread, the first bearing supporting cylindrical surface, the second bearing supporting cylindrical surface, the balancing shaft driven gear cylindrical surface and the first square keyway.

[0007] As a further solution of the present invention, a semicircular key is provided in the first square keyway, and a balancing shaft driven gear assembly is sleeved on the cylindrical surface of the balancing shaft driven gear, a balancing shaft right counterweight is provided at the left end of the balancing shaft driven gear assembly, and a gasket is provided between the balancing shaft driven gear assembly and the nut. The coordinated use of the first square keyway and the semicircular key structure facilitates the installation of the balancing shaft driven gear assembly and the balancing shaft right counterweight.

[0008] As a further solution of the present invention, the balancing shaft driven gear assembly is composed of a balancing gear center kit, a balancing shaft driven gear, a cylindrical damping rubber block and a damping compression spring, the balancing gear center kit is sleeved with the balancing shaft driven gear, a cylindrical damping rubber block is arranged between the balancing gear center kit and the balancing shaft driven gear, and an elastic washer and a flat washer are sleeved between the balancing gear center kit and the balancing shaft driven gear, the balancing gear center kit includes a balancing gear center sleeve, the balancing gear center sleeve is provided with a first rectangular groove and a second rectangular groove, and a flat An axial hole is provided in the middle of the balance gear center sleeve, and a rectangular concave key groove is provided on the inner wall of the axial hole, and the balance gear center sleeve is symmetrically provided with a first cylindrical hole and a second cylindrical hole respectively, and the first cylindrical hole and the second cylindrical hole are both provided with a balance gear center sleeve positioning pin, and the balance gear center sleeve is provided with a first rectangular groove and a second rectangular groove, and the balance gear center sleeve is provided with a first semicircular concave surface and a second semicircular concave surface. The balance gear center kit, the balance shaft driven gear, the cylindrical damping rubber block and the damping compression spring structure are arranged to facilitate the formation of a balance shaft driven gear assembly.

[0009] As a further scheme of the present invention, the balance shaft driven gear includes a tooth surface, a first trapezoidal groove plane and a second trapezoidal groove plane are provided on the tooth surface, a third trapezoidal groove plane and a fourth trapezoidal groove plane are symmetrically provided on the tooth surface, a first U-shaped groove and a second U-shaped groove are symmetrically provided on the tooth surface from top to bottom, and a first semicircular groove and a second semicircular groove are symmetrically provided on the tooth surface from left to right. The tooth surface, the first trapezoidal groove plane, the second trapezoidal groove plane, the third trapezoidal groove plane, the fourth trapezoidal groove plane, the first semicircular groove, the second semicircular groove, the first U-shaped groove and the second U-shaped groove structure are convenient for forming the balance shaft driven gear.

[0010] As a further solution of the present invention, a first cylindrical groove, a first rectangular groove, a second cylindrical groove, a second rectangular groove, a first trapezoidal groove and a second trapezoidal groove are formed between the balance gear center kit and the balance shaft driven gear, and damping springs are provided in the first rectangular groove and the second rectangular groove, so that a buffering effect can be provided by cooperating with the set damping spring structure.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. When the present invention is used, the cylindrical damping rubber block is installed between the balancing gear center kit and the balancing shaft driven gear, and when the balancing shaft driven gear is rotated and changed in speed (accelerated or decelerated), it plays a shock absorbing and buffering role when it is subjected to impact force.

[0012] 2. The damping compression spring is installed between the balance gear center kit and the balance shaft driven gear to play a reaction force to push the balance shaft driven gear to reset, and the flexible meshing plays a role in noise reduction.

[0013] 3. The elastic washers and flat washers are installed between the balancing gear center kit and the balancing shaft driven gear to reduce the friction and hard collision between the two parts, and are used to prevent the balancing shaft and the driven gear assembly from loosening after being fastened to the balancing shaft right counterweight.

[0014] 4. The positioning pin of the center sleeve of the balance gear is rotated to a fixed angle in the trapezoidal groove of the driven gear of the balance shaft to play a limiting role.

[0015] 5. Reduce the cost of maintenance parts. If the tooth surface is damaged, only the driven gear of the balance shaft needs to be replaced. There is no need to replace the whole set of assembly parts such as the right counterweight of the balance shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a schematic diagram of the structure of a buffered and noise-reducing balance shaft gear of a motorcycle engine.

[0017] Figure 2 The present invention is a schematic diagram of the planar cross-sectional structure of a buffered and noise-reducing balance shaft gear of a motorcycle engine.

[0018] Figure 3 The present invention is a structural schematic diagram of the connection between a balance gear center kit and a balance shaft driven gear in a buffered and noise-reducing balance shaft gear of a motorcycle engine.

[0019] Figure 4 The present invention is a structural schematic diagram of a balance gear center kit in a buffered and noise-reducing balance shaft gear of a motorcycle engine.

[0020] Figure 5 The present invention is a schematic structural diagram of a balance shaft driven gear in a buffered and noise-reducing balance shaft gear of a motorcycle engine.

[0021] Figure 6 The present invention is a schematic structural diagram of a right counterweight block of a balance shaft in a buffered and noise-reducing balance shaft gear of a motorcycle engine.

[0022] Figure 7 The present invention is a curve diagram of torque and rotation angle in a buffered and noise-reducing balance shaft gear of a motorcycle engine.

[0023] In the figure: 1, nut; 100, balance shaft driven gear assembly; 101, tooth surface; 102, cylindrical damping rubber block; 103, damping compression spring; 104, first cylindrical groove; 105, first rectangular groove; 106, second cylindrical groove; 107, second rectangular groove; 108, first trapezoidal groove; 109, second trapezoidal groove; 110, balance gear center kit; 111, balance gear center sleeve; 112, first a rectangular groove; 113, a second rectangular groove; 114, a first cylindrical hole; 115, an axial hole; 116, a rectangular concave key groove; 117, a second cylindrical hole; 118, a first semicircular concave surface; 119, a second semicircular concave surface; 120, a balance shaft driven gear; 121, a first trapezoidal groove plane; 122, a second trapezoidal groove plane; 123, a third trapezoidal groove plane; 124, a fourth trapezoidal groove plane; 125, a first semicircular groove; 126 , second semicircular groove; 127, first U-shaped groove; 128, second U-shaped groove; 129, balancing gear center sleeve positioning pin; 130, elastic washer; 131, flat washer; 1000, balancing shaft and driven gear assembly; 2, gasket; 200, driving gear and crankshaft assembly; 201, driving gear; 202, connecting rod; 210, crankshaft assembly; 220, first bearing; 230, second bearing; 300, balancing shaft assembly; 301 , middle step shaft; 302, left counterweight of balancing shaft; 303, thread; 304, first bearing supporting cylindrical surface; 305, second bearing supporting cylindrical surface; 306, cylindrical surface of driven gear of balancing shaft; 307, first square keyway; 310, third bearing; 320, fourth bearing; 4, semicircular key; 400, right counterweight of balancing shaft; 401, second square keyway; 402, third cylindrical hole; 403, semicircular block; 404, heat dissipation hole. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0025] In the present invention, the word "exemplary" is used to mean "used as an example, illustration or description". Any embodiment described as "exemplary" in the present invention is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present invention.

[0026] Example See also Figures 1 to 7 In an embodiment of the present invention, a buffered noise reduction type balance shaft gear of a motorcycle engine includes a balance shaft and driven gear assembly 1000 and a driving gear and crankshaft assembly 200. The balance shaft and driven gear assembly 1000 is composed of a balance shaft driven gear assembly 100, a balance shaft assembly 300, a balance shaft left counterweight block 302, a third bearing 310, a fourth bearing 320, a semicircular key 4, a balance shaft right counterweight block 400, a gasket 2 and a nut 1. The driving gear and crankshaft assembly 200 is composed of a driving gear 201, a crankshaft assembly 210, a first bearing 220, a second bearing 230 and a connecting rod 202.

[0027] The balancing shaft assembly 300 includes an intermediate step shaft 301, a balancing shaft left counterweight 302, a thread 303, a first bearing support cylindrical surface 304, a second bearing support cylindrical surface 305, a balancing shaft driven gear cylindrical surface 306 and a first square keyway 307. The left end of the intermediate step shaft 301 is provided with a first bearing support cylindrical surface 304, the right end of the intermediate step shaft 301 is provided with a second bearing support cylindrical surface 305, and a balancing shaft left counterweight is provided on the second bearing support cylindrical surface 305. Block 302, a third bearing 310 is provided on the first bearing supporting cylindrical surface 304, a fourth bearing 320 is provided on the second bearing supporting cylindrical surface 305, a balancing shaft driven gear cylindrical surface 306 is provided at the left end of the first bearing supporting cylindrical surface 304, a first square keyway 307 is provided on the balancing shaft driven gear cylindrical surface 306, and a nut 1 is threadedly connected on the balancing shaft driven gear cylindrical surface 306, and a thread 303 is provided on the balancing shaft driven gear cylindrical surface 306 corresponding to the nut 1.

[0028] Specifically, the balancing shaft assembly 300 is conveniently formed by setting the intermediate step shaft 301, the balancing shaft left counterweight 302, the thread 303, the first bearing support cylindrical surface 304, the second bearing support cylindrical surface 305, the balancing shaft driven gear cylindrical surface 306 and the first square keyway 307.

[0029] A semicircular key 4 is provided in the first square keyway 307 , and a balancing shaft driven gear assembly 100 is sleeved on the cylindrical surface 306 of the balancing shaft driven gear. A balancing shaft right counterweight 400 is provided at the left end of the balancing shaft driven gear assembly 100 , and a gasket 2 is provided between the balancing shaft driven gear assembly 100 and the nut 1 .

[0030] Specifically, the first square keyway 307 and the semicircular key 4 are used in coordination to facilitate installation of the balancing shaft driven gear assembly 100 and the balancing shaft right counterweight 400 .

[0031] The balancing shaft driven gear assembly 100 is composed of a balancing gear center kit 110, a balancing shaft driven gear 120, a cylindrical damping rubber block 102 and a damping compression spring 103. The balancing gear center kit 110 is sleeved with the balancing shaft driven gear 120. A cylindrical damping rubber block 102 is arranged between the balancing gear center kit 110 and the balancing shaft driven gear 120. An elastic washer 130 and a flat washer 131 are sleeved between the balancing gear center kit 110 and the balancing shaft driven gear 120. The balancing gear center kit 110 includes a balancing gear center sleeve 111. The balancing gear center sleeve 111 A first rectangular groove 112 and a second rectangular groove 113 are provided on the balance gear center sleeve 111, an axial hole 115 is provided in the middle of the balance gear center sleeve 111, and a rectangular concave key groove 116 is provided on the inner wall of the axial hole 115, and the balance gear center sleeve 111 is symmetrically provided with a first cylindrical hole 114 and a second cylindrical hole 117 respectively, and a balance gear center sleeve positioning pin 129 is provided in the first cylindrical hole 114 and the second cylindrical hole 117, the balance gear center sleeve 111 is provided with a first rectangular groove 112 and a second rectangular groove 113, and the balance gear center sleeve 111 is provided with a first semicircular concave surface 118 and a second semicircular concave surface 119.

[0032] Specifically, the balancing gear center kit 110 , the balancing shaft driven gear 120 , the cylindrical damping rubber block 102 and the damping compression spring 103 are arranged to form the balancing shaft driven gear assembly 100 .

[0033] The balance shaft driven gear 120 includes a tooth surface 101, on which a first trapezoidal groove plane 121 and a second trapezoidal groove plane 122 are provided, a third trapezoidal groove plane 123 and a fourth trapezoidal groove plane 124 are symmetrically provided on the tooth surface 101, a first U-shaped groove 127 and a second U-shaped groove 128 are symmetrically provided on the tooth surface 101 from top to bottom, and a first semicircular groove 125 and a second semicircular groove 126 are symmetrically provided on the left and right.

[0034] Specifically, the tooth surface 101, the first trapezoidal groove plane 121, the second trapezoidal groove plane 122, the third trapezoidal groove plane 123, the fourth trapezoidal groove plane 124, the first semicircular groove 125, the second semicircular groove 126, the first U-shaped groove 127 and the second U-shaped groove 128 are arranged to facilitate the formation of the balance shaft driven gear 120.

[0035] A first cylindrical groove 104, a first rectangular groove 105, a second cylindrical groove 106, a second rectangular groove 107, a first trapezoidal groove 108 and a second trapezoidal groove 109 are formed between the balance gear center kit 110 and the balance shaft driven gear 120, and a damping compression spring 103 is provided in the first rectangular groove 105 and the second rectangular groove 107.

[0036] Specifically, the damping compression spring 103 structure is used in conjunction with the structure to provide a buffering effect.

[0037] The right counterweight block 400 of the balancing shaft includes a second square keyway 401, a third cylindrical hole 402, a semicircular block 403 and a heat dissipation hole 404. The right counterweight block 400 of the balancing shaft is provided with a third cylindrical hole 402 corresponding to the cylindrical surface 306 of the driven gear of the balancing shaft, and the inner wall of the third cylindrical hole 402 is provided with a second square keyway 401. The right counterweight block 400 of the balancing shaft is provided with a semicircular block 403, and the right counterweight block 400 of the balancing shaft is provided with a plurality of heat dissipation holes 404.

[0038] Specifically, the right counterweight 400 of the balancing shaft is provided to facilitate providing a gravity effect.

[0039] The crankshaft assembly 210 is provided with a connecting rod 202 , and the crankshaft assembly 210 is provided with a first bearing 220 and a second bearing 230 on both sides corresponding to the connecting rod 202 . The crankshaft assembly 210 is provided with a driving gear 201 , which is meshed with the balance shaft driven gear 120 .

[0040] Specifically, the connecting rod 202 is provided to drive the driving gear 201 to rotate.

[0041] The working principle of the present invention is: When the present invention is used, the first trapezoidal groove 108 and the second trapezoidal groove 109 of the balancing shaft driven gear 120 are aligned and installed with the balancing gear center sleeve positioning pin 129, and then the balancing gear center kit 110 is fitted with the elastic washer 130 and the flat washer 131, and then the damping compression spring 103 is installed in the first cylindrical groove 104, the second cylindrical groove 106, the first rectangular groove 105 and the second rectangular groove 107, and a cylindrical damping spring 103 is provided between the balancing gear center kit 110 and the balancing shaft driven gear 120. The rubber block 102, the balancing shaft and the driven gear assembly 1000 are assembled and installed by first pressing the fourth bearing 320 and the third bearing 310 of the balancing shaft assembly 300, respectively, inserting the semicircular key 4 into the first square key groove 307, and installing the balancing shaft driven gear assembly 100 with the rectangular concave key groove 116 aligned with the first square key groove 307, and then installing the balancing shaft right counterweight 400 with the second square key groove 401 aligned with the semicircular key 4, and the balancing shaft right counterweight 400 fits the balancing shaft driven gear assembly 100; Then install the gasket 2 and then install the nut 1 on the thread 303 of the balance shaft assembly 300 and tighten it, start the engine, the connecting rod 202 pushes the crankshaft assembly 210 to drive the driving gear 201 to rotate, and the driving gear 201 transmits power to the balance shaft driven gear 120. When the balance shaft driven gear 120 is subjected to impact force during acceleration, it is buffered by the cylindrical damping rubber block 102 when it rotates counterclockwise. When it rotates to the limited position, the cylindrical surface of the balancing gear center sleeve positioning pin 129 contacts the second trapezoidal groove plane 122 of the balancing shaft driven gear 120, and the cylindrical surface of the balancing gear center sleeve positioning pin 129 on the other side of the symmetrical structure contacts the third trapezoidal groove plane 123 of the balancing shaft driven gear 120; At the same time, the reaction force of the damping compression spring 103 pushes the balance shaft driven gear 120 to reset. When the balance shaft driven gear 120 is subjected to impact force during deceleration, it is buffered by the cylindrical damping rubber block 102 when it rotates clockwise. When it rotates to the limited position, the cylindrical surface of the balancing gear center sleeve positioning column pin 129 contacts the first trapezoidal groove plane 121 of the balance shaft driven gear 120, and the cylindrical surface of the balancing gear center sleeve positioning column pin 129 on the other side of the symmetrical structure contacts the fourth trapezoidal groove plane 124 of the balance shaft driven gear 120. At the same time, the reaction force of the damping compression spring 103 pushes the balance shaft driven gear 120 to reset, so as to achieve a buffering effect during the deceleration or acceleration process of the driving gear 201 of the engine. The cylindrical damping rubber block 102 is installed between the balance gear center kit 110 and the balance shaft driven gear 120. When the balance shaft driven gear 120 is rotated and the speed is changed (accelerated or decelerated), it will play a shock absorbing and buffering role. The damping compression spring 103 is installed between the balance gear center kit 110 and the balance shaft driven gear 120 to play a reaction force to push the balance shaft driven gear 120 to reset. The flexible meshing plays a noise reduction role. The elastic washer 130 and the flat washer 131 are installed on the balance gear The center kit 110 and the balancing shaft driven gear 120 reduce the friction and hard collision between the two parts, and are used to prevent the balancing shaft and driven gear assembly 1000 from loosening after being fastened to the balancing shaft right counterweight 400. The balancing gear center sleeve positioning pin 129 is rotated to a fixed angle in the trapezoidal groove of the balancing shaft driven gear 120 to play a limiting role, thereby reducing the cost of maintenance parts. If the tooth surface 101 is damaged, only the balancing shaft driven gear 120 needs to be replaced, without replacing the entire set of assembly parts such as the balancing shaft right counterweight 400.

[0042] Although the present invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the present invention. That is, the methods, systems or devices discussed above are all examples. Various configurations may appropriately omit, replace or add various processes or components. For example, in alternative configurations, the method may be performed in an order different from the order described, and / or various stages may be added, omitted and / or combined. Moreover, the features described with respect to certain configurations may be combined in various other configurations. Different aspects and elements of the configurations may be combined in a similar manner. In addition, with the development of technology, many elements are merely examples and do not limit the scope of the present disclosure or claims.

[0043] Specific details are given in the specification to provide a thorough understanding of the exemplary configurations including implementations. However, the configurations can be practiced without these specific details. For example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary details to avoid obscuring the configurations. This description provides only example configurations and does not limit the scope, applicability, or configurations of the claims. On the contrary, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made to the functions and arrangements of the elements without departing from the spirit or scope of the present disclosure.

[0044] In addition, although each operation may describe the operation as a sequential process, many operations may be performed in parallel or simultaneously. In addition, the order of the operations may be rearranged. A process may have additional steps. In addition, examples of methods may be implemented by hardware, software, firmware, middleware, code, hardware description language, or any combination thereof. When implemented in software, firmware, middleware, or code, program code or code segments for performing the necessary tasks may be stored in a non-transitory computer-readable medium such as a storage medium, and the described tasks are performed by a processor.

[0045] In summary, it is intended that the above detailed description is considered to be illustrative rather than restrictive, and it should be understood that the claims (including all equivalents) are intended to limit the spirit and scope of the present invention. The above embodiments should be understood to be only used to illustrate the present invention and not to limit the scope of protection of the present invention. After reading the content of the record of the present invention, the technician can make various changes or modifications to the present invention, and these equivalent changes and modifications also fall into the scope limited by the claims of the present invention.

Claims

1. A balance shaft gear capable of buffering and reducing noise of a motorcycle engine, comprising a balance shaft and a driven gear assembly (1000) and a driving gear and a crankshaft assembly (200), characterized in that: The balancing shaft and driven gear assembly (1000) is composed of a balancing shaft driven gear assembly (100), a balancing shaft assembly (300), a balancing shaft left counterweight (302), a third bearing (310), a fourth bearing (320), a semicircular key (4), a balancing shaft right counterweight (400), a gasket (2) and a nut (1), and the driving gear and crankshaft assembly (200) is composed of a driving gear (201), a crankshaft assembly (210), a first bearing (220), a second bearing (230) and a connecting rod (202). The balancing shaft right counterweight (400) comprises a second square keyway (401), a third cylindrical hole (402), a semicircular block (403) and a heat dissipation hole (404); the balancing shaft right counterweight (400) is provided with a third cylindrical hole (402) corresponding to the cylindrical surface (306) of the driven gear of the balancing shaft, and the inner wall of the third cylindrical hole (402) is provided with a second square keyway (401); the balancing shaft right counterweight (400) is provided with a semicircular block (403), and the balancing shaft right counterweight (400) is provided with a plurality of heat dissipation holes (404).

2. A motorcycle engine buffered noise reduction balance shaft gear according to claim 1, characterized in that: The balancing shaft assembly (300) comprises an intermediate step shaft (301), a balancing shaft left counterweight (302), a thread (303), a first bearing support cylindrical surface (304), a second bearing support cylindrical surface (305), a balancing shaft driven gear cylindrical surface (306) and a first square keyway (307); the first bearing support cylindrical surface (304) is provided at the left end of the intermediate step shaft (301), and the second bearing support cylindrical surface (305) is provided at the right end of the intermediate step shaft (301).

3. A motorcycle engine buffered noise reduction balance shaft gear according to claim 2, characterized in that: A left counterweight block (302) of the balancing shaft is arranged on the second bearing support cylindrical surface (305), a third bearing (310) is arranged on the first bearing support cylindrical surface (304), a fourth bearing (320) is arranged on the second bearing support cylindrical surface (305), a balancing shaft driven gear cylindrical surface (306) is arranged at the left end of the first bearing support cylindrical surface (304), a first square keyway (307) is arranged on the balancing shaft driven gear cylindrical surface (306), a nut (1) is threadedly connected on the balancing shaft driven gear cylindrical surface (306), and a thread (303) is arranged on the balancing shaft driven gear cylindrical surface (306) corresponding to the nut (1).

4. A motorcycle engine buffered noise reduction balance shaft gear according to claim 3, characterized in that: A semicircular key (4) is provided in the first square keyway (307), a balancing shaft driven gear assembly (100) is sleeved on the cylindrical surface (306) of the balancing shaft driven gear, a balancing shaft right counterweight (400) is provided at the left end of the balancing shaft driven gear assembly (100), and a gasket (2) is provided between the balancing shaft driven gear assembly (100) and the nut (1).

5. The bufferable noise-reducing balance shaft gear of a motorcycle engine according to claim 1, characterized in that: The balancing shaft driven gear assembly (100) is composed of a balancing gear center kit (110), a balancing shaft driven gear (120), a cylindrical damping rubber block (102) and a damping compression spring (103); the balancing shaft driven gear (120) is sleeved on the balancing gear center kit (110); a cylindrical damping rubber block (102) is provided between the balancing gear center kit (110) and the balancing shaft driven gear (120); and an elastic washer (130) and a flat washer (131) are sleeved between the balancing gear center kit (110) and the balancing shaft driven gear (120).

6. A motorcycle engine buffered noise reduction balance shaft gear according to claim 5, characterized in that: The balancing gear center kit (110) comprises a balancing gear center sleeve (111), the balancing gear center sleeve (111) being provided with a first rectangular groove (112) and a second rectangular groove (113), a shaft hole (115) being provided in the middle of the balancing gear center sleeve (111), a rectangular concave key groove (116) being provided on the inner wall of the shaft hole (115), and a first cylindrical hole (114) and a second cylindrical hole (117) being symmetrically provided on the upper and lower sides of the balancing gear center sleeve (111).

7. A motorcycle engine buffered noise reduction balance shaft gear according to claim 6, characterized in that: The first cylindrical hole (114) and the second cylindrical hole (117) are both provided with a balancing gear center sleeve positioning pin (129), the balancing gear center sleeve (111) is provided with a first rectangular groove (112) and a second rectangular groove (113), and the balancing gear center sleeve (111) is provided with a first semicircular concave surface (118) and a second semicircular concave surface (119).

8. The bufferable noise-reducing balance shaft gear of a motorcycle engine according to claim 7, characterized in that: The balance shaft driven gear (120) comprises a tooth surface (101), a first trapezoidal groove plane (121) and a second trapezoidal groove plane (122) are provided on the tooth surface (101), a third trapezoidal groove plane (123) and a fourth trapezoidal groove plane (124) are symmetrically provided on the tooth surface (101), a first U-shaped groove (127) and a second U-shaped groove (128) are symmetrically provided on the tooth surface (101) in upper and lower directions, and a first semicircular groove (125) and a second semicircular groove (126) are symmetrically provided on the tooth surface (101) in left and right directions.

9. The bufferable noise-reducing balance shaft gear of a motorcycle engine according to claim 8, characterized in that: A first cylindrical groove (104), a first rectangular groove (105), a second cylindrical groove (106), a second rectangular groove (107), a first trapezoidal groove (108) and a second trapezoidal groove (109) are formed between the balancing gear center kit (110) and the balancing shaft driven gear (120).

10. A motorcycle engine buffered noise reduction balance shaft gear according to claim 9, characterized in that: Damping compression springs (103) are provided in both the first rectangular parallelepiped groove (105) and the second rectangular parallelepiped groove (107).

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