A motorcycle drive wheel assembly

Abstract

The utility model belongs to the technical field of motorcycle gear shifting device, especially point to a kind of motorcycle driving wheel assembly;The side surface of platen is distributed with several plie pearl grooves extending along plie pearl grooves radially, and plie pearl is movably arranged in plie pearl groove, and can reciprocate along plie pearl groove to drive platen to produce axial displacement, the middle part of plie plate is provided with sleeve shaft part, the middle part of platen is provided with sleeve hole, the outer ring of plie plate is distributed with several slide bar holes, the axis of slide bar hole is parallel with sleeve shaft part, first bearing is arranged in slide bar hole, the side surface adjacent to plie plate on platen is circumferentially provided with several slide bars corresponding with the number and position of slide bar hole, and slide bar is slidably connected with first bearing;The utility model is slidably connected between plie plate and platen by first bearing and slide bar, so as to reduce frictional resistance, so that platen can more smoothly carry out axial displacement, and the service life of component is prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of motorcycle transmission devices, and specifically refers to a motorcycle drive wheel assembly. Background Technology

[0002] A continuously variable transmission (CVT) for motorcycles refers to a transmission where the gear ratio changes continuously without levels. It changes the gear ratio by altering the diameters of the front and rear pulleys. This type of transmission has no steps and is entirely controlled by the throttle, engine speed, and changes in the pulley diameters.

[0003] Chinese utility model patent (publication number CN 209743423U, publication date 2019.12.06) discloses a clutch drive wheel assembly for a motorcycle, including a friction disc, rollers, and a ramp plate. The friction disc has several radially extending inclined roller grooves on its side facing the ramp plate. The rollers can reciprocate within the inclined roller grooves along the extension direction of the grooves. Friction blocks are embedded in the inner walls of the inclined roller grooves, and the rollers can always abut against the friction blocks during movement. The outer edge of the friction disc has an annular retaining edge extending circumferentially. The inner edge of the annular retaining edge has several guide ribs extending axially along the friction disc. A sliding sleeve is provided at the edge of the ramp plate. The sliding sleeve slides axially with the guide ribs and is circumferentially limited. As can be seen from the above, when the ramp plate of the clutch drive wheel assembly of the above motorcycle moves axially, the sliding sleeve and the guide rib shaft move and guide through sliding friction. This has the problems of high frictional resistance, easy wear, slow response, and risk of jamming due to thermal expansion under high load, resulting in poor reliability. Summary of the Invention

[0004] The purpose of this invention is to provide a motorcycle drive wheel assembly that transforms sliding friction into rolling friction, thereby reducing frictional resistance and making the gear shifting process smoother.

[0005] This utility model is implemented as follows: A motorcycle drive wheel assembly includes a jacking disc, jacking balls, and a pressure plate. A plurality of jacking ball grooves extending radially along one side of the jacking disc are circumferentially distributed. The jacking balls are movably disposed within the jacking ball grooves and can reciprocate along the grooves, thereby driving the pressure plate to generate axial displacement. A sleeve shaft portion is provided in the middle of the jacking disc, and a sleeve shaft hole is provided in the middle of the pressure plate. A plurality of sliding rod holes are circumferentially distributed on the outer ring of the jacking disc. The axis of the sliding rod holes is parallel to the sleeve shaft portion, and a first bearing is disposed within the sliding rod holes. A plurality of sliding rods corresponding one-to-one in number and position to the sliding rod holes are circumferentially arranged on the side of the pressure plate adjacent to the jacking disc, and the sliding rods slide in engagement with the first bearing.

[0006] In the aforementioned motorcycle drive wheel assembly, a second bearing is provided inside the bushing portion.

[0007] In the aforementioned motorcycle drive wheel assembly, the slide rod and the pressure plate are fixedly connected by means of threading, pressing, riveting, or welding.

[0008] In the aforementioned motorcycle drive wheel assembly, the outer circumference of the pulley has several bosses distributed thereon, and the slide bar hole is disposed on the bosses.

[0009] In the aforementioned motorcycle drive wheel assembly, the pulley is provided with a plurality of partition groups along the radial direction, each partition group including two spaced-apart partitions, with a pulley groove formed between the two partitions.

[0010] In the aforementioned motorcycle drive wheel assembly, the bottom of the pulverized bead groove is inclined or arc-shaped, and the bottom of the groove gradually rises from the inside of the pulverized bead towards the outside.

[0011] In the aforementioned motorcycle drive wheel assembly, the pressure plate includes a high-position area and a low-position area, which are distributed circumferentially. The slide rod is disposed on the side of the high-position area adjacent to the jacking plate. When the jacking ball moves in the jacking ball groove, it directly acts on the side of the low-position area adjacent to the jacking plate to drive the pressure plate to generate axial displacement.

[0012] In one of the aforementioned motorcycle drive wheel assemblies, the plenum grooves are provided with 4 to 8.

[0013] The outstanding advantages of this utility model compared to the prior art are: 1. In this utility model, the pressure plate and the pressure plate are connected by a first bearing and a sliding rod, which transforms the traditional sliding friction into rolling friction, thereby reducing frictional resistance, enabling the pressure plate to make axial displacement more smoothly, making the speed change process smoother and quieter, and extending the service life of the components.

[0014] 2. This utility model replaces the traditional sliding sleeve connection between the main shaft and the pressure plate with a second bearing, which also transforms sliding friction into rolling friction, further reducing frictional resistance and making the speed change process smoother.

[0015] 3. The first bearing of this utility model is set on the boss. The setting of the boss greatly enhances the rigidity and strength of this local area, enabling it to more reliably withstand long-term, alternating loads and prevent the pulley from deforming or cracking. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a schematic diagram of the pleuri beads arranged in the pleuri bead groove of this utility model; Figure 3This is one of the schematic diagrams of the pressure plate of this utility model; Figure 4 This is the second schematic diagram of the pressure plate of this utility model; Figure 5 This is a schematic diagram of the pulley of this utility model.

[0017] In the diagram: 1. Plug plate; 2. Plug beads; 3. Pressure plate; 4. Plug bead groove; 5. Sleeve shaft part; 6. Sleeve shaft hole; 7. First bearing; 8. Slide rod; 9. Second bearing; 10. Boss; 11. Partition plate; 12. High position area; 13. Low position area. Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —5: This utility model provides a motorcycle drive wheel assembly, which includes a jacking disc 1, jacking balls 2, and a pressure plate 3. A plurality of jacking ball grooves 4 extending radially along one side of the jacking disc 1 are distributed circumferentially. The jacking balls 2 are movably disposed within the jacking ball grooves 4 and can reciprocate along the jacking ball grooves 4, thereby driving the pressure plate 3 to generate axial displacement. A sleeve shaft portion 5 is provided in the middle of the jacking disc 1, and a sleeve shaft hole 6 is provided in the middle of the pressure plate 3. A plurality of sliding rod holes are distributed circumferentially on the outer ring of the jacking disc 1. The axis of the sliding rod holes is parallel to the sleeve shaft portion 5, and a first bearing 7 is provided within the sliding rod holes. A plurality of sliding rods 8, corresponding one-to-one in number and position to the sliding rod holes, are arranged circumferentially on the side of the pressure plate 3 adjacent to the jacking disc 1. The sliding rods 8 are slidably engaged with the first bearing 7.

[0019] In use, the main shaft passes through the sleeve shaft portion 5 and the sleeve shaft hole 6. A fixed wheel that rotates with the main shaft is also installed on the main shaft on one side of the drive wheel assembly. A transmission belt is installed between the drive wheel assembly and the fixed wheel. When the main shaft rotates, it drives the fixed wheel and the drive wheel assembly to rotate. Under the action of centrifugal force, the plenum beads 2 in the plenum groove 4 move outwards, acting on the pressure plate 3 to cause axial displacement, reducing the distance between them and the fixed wheel. Correspondingly, the transmission belt installed between the fixed wheel and the pressure plate is displaced, gradually moving closer to the outer ring of the plenum plate, and the corresponding rotational speed gradually increases, resulting in stepless speed regulation.

[0020] This invention transforms sliding friction into rolling friction through the sliding engagement of the slide rod 8 and the first bearing 7, thereby reducing frictional resistance and enabling the pressure plate 3 to move axially more smoothly. The speed change process is smoother and quieter, while also extending the service life of the components.

[0021] Furthermore, this invention also includes a second bearing 9 within the sleeve shaft portion 5. The main shaft passes through the second bearing 9, which also converts sliding friction into rolling friction, further reducing frictional resistance and making the speed change process smoother. The first bearing 7 and the second bearing 9 can be linear bearings or ball bearings, etc.

[0022] It should be noted that the slide bar 8 and the pressure plate 3 can be fixedly connected by threading, pressing, riveting, or welding.

[0023] This invention features a plurality of bosses 10 distributed circumferentially on the outer ring of the pulley 1, with the slide rod holes disposed on the bosses 10. An annular retaining rim 14 is provided on the outer ring of the pulley 1, and the outer end faces of the bosses 10 are flush with the outer ends of the annular retaining rim 14. The presence of the bosses 10 significantly enhances the rigidity and strength of this local area, enabling it to more reliably withstand long-term, alternating loads and preventing deformation or cracking of the pulley. In this embodiment, four bosses 10 are provided, corresponding to four first bearings 7 and four slide rods 8.

[0024] The plenum disc 1 of this invention has a plurality of partition groups arranged radially, each partition group including two spaced-apart partitions 11, with a plenum groove 4 formed between the two partitions 11. There are 4 to 8 plenum grooves 4. In this embodiment, there are 8 plenum grooves 4.

[0025] The bottom of the bead groove 4 is inclined or arc-shaped, and the bottom of the groove gradually rises from the inside of the bead plate 1 towards the outside.

[0026] Furthermore, the pressure plate 3 of this invention includes a high-position area 12 and a low-position area 13, which are distributed circumferentially at intervals. The slide rod 8 is disposed on the side of the high-position area 12 adjacent to the jacking plate 1. When the jacking beads 2 move within the jacking bead groove 4, they directly act on the side of the low-position area 13 adjacent to the jacking plate 1 to drive the pressure plate 3 to generate axial displacement. In this embodiment, four high-position areas 12 and eight low-position areas are provided.

[0027] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A motorcycle drive wheel assembly, comprising a pulley disc (1), pulley balls (2), and a pressure plate (3), wherein a plurality of pulley ball grooves (4) extending radially along the pulley disc (1) are distributed circumferentially on one side of the pulley disc (1), the pulley balls (2) are movably disposed within the pulley ball grooves (4) and can reciprocate along the pulley ball grooves (4) to drive the pressure plate (3) to generate axial displacement, a sleeve shaft portion (5) is provided in the middle of the pulley disc (1), and a sleeve shaft hole (6) is provided in the middle of the pressure plate (3), characterized in that: The outer ring of the pulley (1) is circumferentially distributed with several sliding rod holes. The axis of the sliding rod holes is parallel to the sleeve shaft (5). A first bearing (7) is provided in the sliding rod holes. On the side of the pressure plate (3) adjacent to the pulley (1), several sliding rods (8) are circumferentially arranged, corresponding one-to-one with the number and position of the sliding rod holes. The sliding rods (8) are slidably engaged with the first bearing (7).

2. A motorcycle idler wheel assembly as claimed in claim 1 wherein: A second bearing (9) is provided inside the sleeve shaft part (5).

3. A motorcycle driving wheel assembly according to claim 1 or 2, wherein: The slide bar (8) and the pressure plate (3) are fixedly connected by thread, press-fitting, riveting and welding.

4. A motorcycle drive wheel assembly as claimed in claim 1 or 2, wherein: The outer circumference of the pulley (1) has several bosses (10), and the slide hole is provided on the bosses (10).

5. A motorcycle drive wheel assembly as claimed in claim 1 or 2, wherein: The pulley disc (1) is provided with several partition groups along the radial direction. Each partition group includes two partitions (11) spaced apart, and a pulley groove (4) is formed between the two partitions (11).

6. A motorcycle idler wheel assembly as claimed in claim 5 wherein: The bottom of the plethysmoid groove (4) is inclined or arc-shaped, and the bottom of the groove gradually rises from the inside of the plethysmoid disc (1) toward the outside.

7. A motorcycle drive wheel assembly according to claim 1, characterized in that: The pressure plate (3) includes a high position area (12) and a low position area (13). The high position area (12) and the low position area (13) are distributed circumferentially. The slide rod is set on the side of the high position area (12) adjacent to the pulverized plate (1). When the pulverized ball moves in the pulverized ball groove (4), it directly acts on the side of the low position area (13) adjacent to the pulverized plate (1) to drive the pressure plate (3) to generate axial displacement.

8. A motorcycle idler wheel assembly as defined in claim 1 wherein: The plethysmoid groove (4) is provided with 4 to 8.

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