Isolator with shell falling prevention structure

Abstract

The utility model relates to the technical field of isolators, in particular to an isolator with a shell falling prevention structure. The device comprises a shell, a gear is movably installed at one end of the shell, a star wheel is fixedly installed at the other end of the shell, a plurality of wedge-shaped pin roller grooves are formed in the inner wall of the star wheel, pin rollers and flat springs are installed in the pin roller grooves, and the peripheral face of one end of the gear can abut against the pin rollers. A plurality of positioning grooves are evenly distributed in the arc-shaped chamfer of the peripheral face of the end, away from the gear, of the star wheel, positioning protrusions matched with the positioning grooves are arranged on the inner wall of the shell, a shaft bush in interference fit with the inner wall of a shaft hole of the gear is arranged in the gear, and a plurality of oil storage grooves are evenly distributed in the inner wall of the shaft bush. According to the starter isolator, after the prior art is improved, the stability between the star wheel and the shell is improved when the starter isolator rotates at a high speed, abrasion among the pin rollers, the gear and the star wheel is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field, in particular to a one-way device with a shell-falling-off prevention structure. Background Art

[0002] The automobile starter is a machine that converts the electrical energy of the battery into mechanical energy to drive the engine flywheel to rotate, thereby starting the engine, and the one-way clutch is a transmission device on the starter that transfers the torque produced by the motor to the flywheel.

[0003] For example, a Chinese patent document with authorization number CN202756155U discloses a starter one-way device, including a gear, a housing, a star wheel and multiple ball bearings. One end of the gear is installed in the center hole of one end of the star wheel via multiple rollers. However, since the gear rotates continuously at high speed during operation, often even reaching more than 10,000 revolutions, the housing is fixed only by friction in this case, which will cause the star wheel and the housing to be unstable, resulting in displacement of the pressure ring and wear among the rollers, gears and star wheels. In the long run, it will seriously affect the service life and use effect of the starter one-way device, and it also has the disadvantages of high noise and high mass.

[0004] Therefore, it is necessary to improve the deficiencies in the above prior art. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a one-way device with an anti-shell falling-off structure in view of the above-mentioned deficiencies in the prior art, so as to enhance the connection stability between the star wheel and the shell, reduce the noise of the starter one-way device, and reduce the wear between the rollers, gears and star wheels.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a one-way device with an anti-housing falling-off structure, comprising a housing, a gear movably mounted on one end of the housing, and a star wheel fixedly mounted on the other end, a plurality of wedge-shaped roller grooves are opened on the inner wall of the star wheel, rollers and flat springs are installed in the roller grooves, the outer peripheral surface of one end of the gear can abut against the rollers, a plurality of positioning grooves are evenly distributed at the arc chamfered corners of the outer peripheral surface of one end of the star wheel away from the gear, a positioning protrusion matching the positioning groove is provided on the inner wall of the housing, a shaft bushing which is interference fit with the inner wall of its shaft hole is provided in the gear, and a plurality of oil storage grooves are evenly distributed on the inner wall of the shaft bushing.

[0007] By adopting the above technical solution, the positioning groove of the star wheel and the positioning protrusion of the outer shell cooperate with each other, so that the star wheel and the outer shell are firmly fixed, which greatly increases the stability of the starter one-way device during high-speed rotation, makes the structure more stable, and can effectively prevent the outer shell from loosening and falling off; through the shaft bushing arranged in the gear and the oil storage groove on its inner wall, the lubricating oil can be kept between the shaft bushing and the rotating shaft of the starter motor for a longer time, thereby reducing wear and extending the service life.

[0008] The above technical solution is further configured as follows: a receiving groove is provided on the end face of the star wheel close to the gear, a clamping ring is provided at the bottom of the receiving groove, a pressure ring is provided on the side of the clamping ring away from the star wheel, one side of the pressure ring is abutted against the outer shell, and an annular clamping groove is provided on the end of the gear close to the clamping ring to cooperate with the clamping ring.

[0009] By adopting the above technical solution, the clamping ring in the receiving groove is clamped between the shell and the star wheel through the pressure ring, and then the inner side of the clamping ring is clamped into the annular groove of the gear, thereby realizing axial limitation of the gear and improving the sealing inside the one-way device.

[0010] The above technical solution is further configured as follows: a convex ring facing the clamping ring is provided on the outer periphery of the pressure ring, the inner side wall of the convex ring abuts against the outer side wall of the clamping ring, and the end face of the convex ring close to the star wheel can abut against the end face of the star wheel.

[0011] By adopting the above technical solution, the clamping ring is positioned circumferentially by the convex ring, and the convex ring abuts against the end face of the outer periphery of the receiving groove of the star wheel, which can further improve the sealing performance.

[0012] The above technical solution is further configured as follows: a shift fork clamping groove for the shift fork to be clamped into is provided at one end of the star wheel away from the gear.

[0013] By adopting the above technical solution, the shift fork of the starter's suction-pull switch is inserted into the shift fork slot, so that the suction-pull switch can pull the shift fork to drive the star wheel and the one-way device to move axially back and forth as a whole.

[0014] The beneficial effects achieved by the utility model are: increasing the stability between the star wheel and the housing when the starter non-return device rotates at high speed, reducing the wear between the roller, the gear and the star wheel, and extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0016] Figure 2 It is an axial cross-sectional view in an embodiment of the utility model;

[0017] Figure 3 yes Figure 2 Partial view at position I in the middle;

[0018] Figure 4 It is a circumferential cross-sectional view in an embodiment of the utility model. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] like Figure 1-4 As shown in the figure, a one-way device with an anti-shell falling-off structure includes a shell 1, a gear 2 movably installed at one end of the shell 1, and a star wheel 3 fixedly installed at the other end. The inner wall of the star wheel 3 is provided with a plurality of wedge-shaped roller grooves 30, and rollers 31 and flat springs 32 are installed in the roller grooves 30. The outer peripheral surface of one end of the gear 2 can abut against the roller 31, and the arc chamfered part of the outer peripheral surface of the star wheel 3 away from the gear 2 is evenly provided with a plurality of positioning grooves 33. The inner wall of the shell 1 is provided with a positioning protrusion 11 matching the positioning groove 33, and the gear 2 is provided with a shaft bushing 4 with an interference fit with the inner wall of its shaft hole. A number of oil storage grooves 40 are evenly distributed on the inner wall, a receiving groove 34 is provided on the end face of the star wheel 3 close to the gear 2, a clamping ring 5 is provided at the bottom of the receiving groove 34, a pressure ring 6 is provided on the side of the clamping ring 5 away from the star wheel 3, one side of the pressure ring 6 is in contact with the outer shell 1, an annular groove 20 matching the clamping ring 5 is provided on the end of the gear 2 close to the clamping ring 5, a convex ring 61 facing the clamping ring 5 is provided on the outer periphery of the pressure ring 6, the inner side wall of the convex ring 61 is in contact with the outer side wall of the clamping ring 5, the end face of the convex ring 61 close to the star wheel 3 can be in contact with the end face of the star wheel 3, and a fork clamping groove 35 for the fork to be inserted is provided on the end of the star wheel 3 away from the gear 2.

[0021] In the above embodiment, the positioning groove of the star wheel and the positioning protrusion of the outer shell cooperate with each other, so that the star wheel and the outer shell are firmly fixed, which greatly increases the stability of the starter one-way device during high-speed rotation, makes the structure more stable, and can effectively prevent the outer shell from loosening and falling off; through the shaft bushing arranged in the gear and the oil storage groove on its inner wall, the lubricating oil can be kept between the shaft bushing and the rotating shaft of the starter motor for a longer time, thereby reducing wear and extending the service life.

Claims

1. A one-way gear with an anti-shell falling structure, comprising a shell, a gear movably mounted on one end of the shell, and a star wheel fixedly mounted on the other end, the inner wall of the star wheel is provided with a plurality of wedge-shaped roller grooves, rollers and flat springs are mounted in the roller grooves, and the outer peripheral surface of one end of the gear can abut against the roller, characterized in that: The arc chamfered portion of the outer peripheral surface of one end of the star wheel away from the gear is evenly provided with a plurality of positioning grooves, the inner wall of the outer shell is provided with a positioning protrusion matching the positioning groove, the gear is provided with a shaft bushing which is interference fit with the inner wall of its shaft hole, and the inner wall of the shaft bushing is evenly provided with a plurality of oil storage grooves.

2. The one-way device with a shell-proof structure according to claim 1, characterized in that: A receiving groove is provided on the end surface of the star wheel close to the gear, a clamping ring is provided at the bottom of the receiving groove, a pressure ring is provided on the side of the clamping ring away from the star wheel, one side of the pressure ring is in contact with the outer shell, and an annular clamping groove matching the clamping ring is provided at one end of the gear close to the clamping ring.

3. The one-way device with a shell-proof structure according to claim 2, characterized in that: The outer periphery of the pressure ring is provided with a convex ring facing the clamping ring, the inner side wall of the convex ring abuts against the outer side wall of the clamping ring, and the end face of the convex ring close to the star wheel can abut against the end face of the star wheel.

4. A one-way device with a shell-off prevention structure according to any one of claims 1 to 3, characterized in that: The star wheel is provided with a shift fork clamping groove for the shift fork to be clamped into at one end away from the gear.

Images