A multi-functional gear

Abstract

A multifunctional gear relates to the technical field of gear, including a wheel hub and a rim, the rim is inserted into the wheel hub, the rim and the wheel hub are interference fit or transition fit, and a plurality of rolling ball ramps are arranged in an annular array on the wheel hub. The rolling ball ramps gradually increase in depth in the counterclockwise direction or the clockwise direction. The utility model optimizes the structure of the transmission gear, realizes the requirements of the transmission gear, such as external hardness and internal toughness, to meet the high service life, and improves the hardness of the wheel hub structure and the bearing capacity of the axial direction or the gear shaft hole of the gear.

Description

Technical Field

[0001] This utility model relates to the field of gear technology, and more specifically, to a multifunctional gear. Background Technology

[0002] Gears are widely used in various fields such as industrial machinery, agricultural machinery, construction machinery, and electronic equipment, and are indispensable components in mechanical transmission systems. Due to their widespread use, gears are typically required to have a very high lifespan, reaching millions or even tens of millions of cycles. Therefore, gear design usually employs a hard outer layer and a tough inner layer, with high hardness and wear resistance on the gear contact surface, while the gear core uses a material with relatively lower hardness than the contact surface to improve the gear's toughness and thus extend its overall lifespan.

[0003] However, in certain special applications, it is necessary to have high hardness on the gear contact surface to improve wear resistance and service life, and also high hardness in the middle part of the gear to meet special operating conditions. For example, Chinese patent CN118977687A discloses a ball ramp structure, which relates to the field of brake technology. The ball can move along the driven side ramp groove under the relative rotation drive of the driving side rotor and the driven side rotor, thereby driving the driving side rotor and the driven side rotor to move relative to each other axially.

[0004] The device requires high hardness in the middle part of the gear to achieve the conversion function, but in actual use it was found that the middle part of the gear was severely worn and needed to be replaced frequently. Utility Model Content

[0005] The purpose of this invention is to solve the problems mentioned in the background art, and to propose a multifunctional gear that not only improves the overall service life of the gear, but also solves the special application scenarios of the gear core.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A multifunctional gear includes a hub and a rim, wherein the hub is inserted into the rim, and the rim and hub are in an interference fit or a transition fit. The hub has a plurality of rolling ball ramps arranged in an annular array.

[0008] Furthermore, an outer groove is formed on the inner ring of the wheel rim, and an inner groove is formed on the outer ring of the wheel hub. The inner groove and the outer groove cooperate with each other, and a positioning pin is installed in the outer groove and the inner groove.

[0009] Furthermore, an outer groove is formed on the inner ring of the wheel rim, and a locking block is formed on the outer ring of the wheel hub to cooperate with the outer groove. The wheel hub and the wheel rim are joined together by the outer groove and the locking block through an interference fit or a transition fit.

[0010] Furthermore, the outer wall of the wheel hub is polygonal, and the inner rim of the wheel hub matches the shape of the outer wall of the wheel hub.

[0011] Furthermore, the hub includes an outer hub and an inner hub, and each of the outer hub and the inner hub is provided with three sets of rolling ball ramps to form a double row of rolling tracks.

[0012] Furthermore, the depth of the ball-rolling ramp gradually increases in either a counterclockwise or clockwise direction.

[0013] Furthermore, adjacent rolling ramps are not connected.

[0014] Furthermore, the ball ramp is provided in three or four parts, and the ball ramp is equipped with balls.

[0015] Furthermore, the hub has a gear shaft hole in the middle, and gear teeth are formed on the outer side of the rim.

[0016] Compared with existing technologies, the beneficial effects of this utility model are as follows: By optimizing the transmission gear structure, this utility model not only achieves the requirements of hardness on the outside and toughness on the inside for high service life of the transmission gear, but also improves the hardness of the hub structure and increases the axial load-bearing capacity of the gear or the gear shaft hole. The hub and rim adopt a separate structure, and different materials are selected from the gear according to the usage conditions to meet the service life under high strength; the hub and rim are connected by interference fit or transition fit, realizing two different functional applications of gears and special scenarios within a limited space. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the usage state of this utility model;

[0018] Figure 2 This is a cross-sectional view of the present invention in use.

[0019] Figure 3 This is a schematic diagram of the structure of the first embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the third embodiment of the present utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the fourth embodiment of the present utility model;

[0023] Figure 7 This is a schematic diagram of the rim structure in the fifth embodiment of this utility model;

[0024] Figure 8 This is a schematic diagram of the wheel hub in the fifth embodiment of the present invention;

[0025] Among them: 100-multifunctional gear, 101-hub, 1011-inner hub, 1012-outer hub, 102-gear shaft hole, 103-ball bearing ramp, 104-rim, 105-tooth, 106-outer groove, 107-inner groove, 108-locating pin, 109-block, 2-rotating shaft, 200-translation component. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments:

[0027] First Embodiment

[0028] A multifunctional gear 100 includes a hub 101 and a rim 104, wherein the hub is inserted into the rim, and the rim and the hub are in an interference fit or a transition fit. The hub has a plurality of rolling ball ramps 103 arranged in an annular array.

[0029] Specifically, in this embodiment, three ball-rolling ramps are provided, and balls can be installed on the ball-rolling ramps. Two multi-functional gears work together, and balls are installed between two mating ball-rolling ramps, allowing the balls to move along the ramps.

[0030] To prevent the rim and hub from rotating relative to each other, an outer groove 106 is formed on the inner ring of the rim, and an inner groove 107 is formed on the outer ring of the hub. The inner groove and the outer groove cooperate with each other, and a positioning pin 108 is installed in the outer groove and the inner groove.

[0031] Furthermore, the hub has a gear shaft hole 102 in the middle and gear teeth 105 are formed on the outer side of the rim.

[0032] The gear teeth primarily function to transmit torque, and are typically made from common gear materials such as 45 steel, 20CrMnTi, 20CrMo, 40Cr, 18Cr2Ni4WA, copper alloys, aluminum alloys, powder metallurgy, and specialty plastics. The hub, on the other hand, uses different high-strength materials than the gear teeth, including high-carbon chromium bearing steels GCr15SiMn and GCr15, high-temperature bearing steels Cr4Mo4V and G13Cr4Mo4Ni4V, and ceramic materials. Its main function is to increase the load-bearing capacity of the gear's central area, thereby improving the gear's axial load capacity.

[0033] Furthermore, such as Figure 3 As shown, the depth of the ball-rolling ramp gradually increases in either a counterclockwise or clockwise direction.

[0034] Furthermore, adjacent rolling ramps are not connected.

[0035] Work method: such as Figure 1 and Figure 2 As shown, the multi-functional gear 100 is mounted on a rotating shaft 2, and an axially movable translation member 200 is also mounted on the rotating shaft. The translation member has a ball bearing ramp that mates with the ball bearing ramp of the hub, and the balls are held between the translation member and the multi-functional gear. When an external power source drives the multi-functional gear to rotate, a relative rotation occurs between the multi-functional gear and the translation member, and the position of the balls changes. Through the mutual movement between the balls and the ball bearing ramp, the rotation of the multi-functional gear is converted into the linear motion of the translation member.

[0036] Second Embodiment

[0037] like Figure 4 As shown, this embodiment is basically the same as the first embodiment, except that, in order to improve the axial bearing capacity of the raceway and the ball, four ball ramps are provided.

[0038] Third Embodiment

[0039] like Figure 5 As shown, this embodiment is basically the same as the first embodiment, except that the hub includes an outer hub 1012 and an inner hub 1011. Each of the outer hub and the inner hub is provided with three sets of rolling ball ramps to form a double row of raceways, so as to improve the axial load-bearing capacity of the raceways and the rolling balls.

[0040] Fourth embodiment

[0041] like Figure 6 As shown, this embodiment is basically the same as the first embodiment, except that the outer wall of the wheel hub is polygonal, specifically hexagonal in this embodiment. The inner ring of the wheel rim matches the shape of the outer wall of the wheel hub, so that the relative rotation between the wheel rim and the wheel hub can be avoided without the need for a locating pin.

[0042] Fifth Embodiment

[0043] like Figure 7 and Figure 8 As shown, this embodiment is basically the same as the first embodiment, except that, in order to avoid relative rotation between the wheel rim and the wheel hub, an outer groove 106 is formed on the inner ring of the wheel rim, and a locking block 109 that cooperates with the outer groove is formed on the outer ring of the wheel hub. The wheel hub and the wheel rim are joined together by the outer groove and the locking block through interference fit or transition fit.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions in the above embodiments and specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model.

Claims

1. A multifunctional gear, characterized in that, It includes a hub and a rim, with the hub inserted into the rim. The rim and hub are either interference fit or transition fit. The hub has multiple rolling ball ramps arranged in a ring, with the depth of the rolling ball ramps gradually increasing in either a counterclockwise or clockwise direction.

2. The multifunctional gear according to claim 1, characterized in that, An outer groove is formed on the inner ring of the wheel rim, and an inner groove is formed on the outer ring of the wheel hub. The inner groove and the outer groove cooperate with each other, and a positioning pin is installed in the outer groove and the inner groove.

3. The multifunctional gear according to claim 1, characterized in that, An outer groove is formed on the inner ring of the wheel rim, and a locking block is formed on the outer ring of the wheel hub to cooperate with the outer groove. The wheel hub and the wheel rim are joined together by the outer groove and the locking block through an interference fit or a transition fit.

4. The multifunctional gear according to claim 1, characterized in that, The outer wall of the wheel hub is polygonal, and the inner rim of the wheel hub matches the shape of the outer wall.

5. The multifunctional gear according to any one of claims 1 to 4, characterized in that, The hub includes an outer hub and an inner hub, and each of the outer hub and the inner hub is provided with three sets of rolling ball ramps to form a double row of rolling tracks.

6. The multifunctional gear according to claim 1, characterized in that, Adjacent rolling ramps are not connected.

7. The multifunctional gear according to claim 1, characterized in that, The ball-rolling ramps are provided in at least three or four manner, and the ball-rolling ramps are equipped with balls.

8. The multifunctional gear according to claim 1, characterized in that, The hub has a gear shaft hole in the middle, and the outer side of the rim has gear teeth.

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