A spliced combination type gearbox gear

Abstract

This invention discloses a modular gearbox gear, comprising a gear, wherein the front end face of the gear has a plurality of conical front pin holes that penetrate the rear end face of the gear, and the rear end face of the gear has a plurality of conical rear pin holes that penetrate the front end face of the gear. The gear has an annular groove that communicates with the front and rear pin holes, and the annular groove divides the gear into an inner ring and an outer gear ring. Conical front and rear locating pins are respectively inserted into the front and rear pin holes of the gear. The rear end face of the front locating pin and the front end face of the rear locating pin are respectively formed with a front stud and a rear stud. The rear stud and the front stud extend out of the front and rear end faces of the gear and pass through a retaining washer to be screwed with a fastening nut. The retaining washer is clamped between the fastening nut and the end face of the gear.

Description

Technical Field

[0001] This invention relates to the technical field of gearbox gears, and more specifically to a spliced ​​and combined gearbox gear. Background Technology

[0002] Currently, gearboxes are gearboxes that change the transmission ratio and direction of motion. They are devices that change the speed ratio and direction of motion, and are widely used in automobiles, tractors, ships, machine tools, and various machines to change the torque, speed, and direction of motion transmitted from the drive shaft to the driven shaft according to different working conditions. The change of speed within a gearbox is mainly achieved through gear transmission of different specifications. Gears are generally mounted and fixed on the drive shaft, input shaft, or output shaft. Some gears are fixed to the aforementioned shafts through keyway structures, but the keyway fit is not tight, which can lead to the gear detaching from the shaft. Therefore, some gears are manufactured as an integral part of the shaft, i.e., gears with a shaft. However, when the gear wears out and needs to be replaced, the shaft also needs to be replaced, resulting in high replacement costs. Therefore, it has been proposed to heat-fit the gear onto the shaft, which would prevent detachment, and when the gear needs to be replaced, only the gear needs to be replaced. However, replacing heat-fitted gears also presents its own problems: disassembling heat-fitted gears from the shaft is relatively difficult. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a modular gearbox gear composed of a heat-fitted inner ring and a transmission-connected outer gear ring. When the teeth on the gear wear out and need to be replaced, only the outer gear ring needs to be replaced, and the disassembly and assembly of the outer gear ring is relatively convenient and quick.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A modular gearbox gear includes a gear with several conical front pin holes formed on its front end face and several conical rear pin holes formed on its rear end face. The gear has an annular groove connected to the front and rear pin holes, dividing it into an inner ring a and an outer gear ring b. Conical front and rear locating pins are inserted into the front and rear pin holes, respectively. A front stud and a rear stud are formed on the rear and front ends of the front and rear locating pins, respectively. A front stud and a rear stud are formed on the rear and front ends of the gear, respectively. The rear and front studs extend from the front and rear ends of the gear and pass through a retaining washer, respectively, to be screwed onto a fastening nut. The retaining washer is clamped between the fastening nut and the end face of the gear.

[0006] Preferably, the central axis of the front pin hole and the central axis of the rear pin hole on the gear are both located within the annular groove of the gear, and the central axis of the annular groove and the central axis of the gear are on the same straight line; at least two front pin holes and two rear pin holes are provided, the number of front pin holes and the number of rear pin holes are equal, and the front pin holes and rear pin holes are evenly distributed in a ring around the central axis of the gear.

[0007] Preferably, the cone angle of the inner wall of the front pin hole on the gear is equal to the cone angle of the outer wall of the front locating pin, the cone angle of the inner wall of the rear pin hole is equal to the cone angle of the outer wall of the rear locating pin, and the lengths of both the rear locating pin and the front locating pin are less than the thickness of the gear.

[0008] Preferably, the rear end face of the rear positioning pin and the front end face of the front positioning pin are respectively formed with a regular hexagonal rear limiting hole and a front limiting hole.

[0009] Preferably, the length of the rear locating pin is equal to the length of the front locating pin.

[0010] Preferably, the diameter of the inner wall at the front end of the front pin hole is greater than the diameter of the inner wall at the rear end; the diameter of the inner wall at the front end of the rear pin hole is smaller than the diameter of the inner wall at the rear end.

[0011] Preferably, the locking washer includes a "mountain"-shaped main washer, the middle of which is inserted into the front or rear stud, and the two ends of the main washer are bent into arc-shaped inserts, which are inserted into the annular grooves on both sides of the front or rear stud; the middle of the main washer is formed with several locking lugs, and the fastening nut is an external hexagonal nut, with the locking lugs bent and abutting against the outer side wall of the fastening nut.

[0012] The beneficial effects of this invention are as follows: its gearbox gear is composed of an inner ring for heat fitting and an outer gear ring for transmission connection. When the teeth on the gear are worn and need to be replaced, only the outer gear ring needs to be replaced. The disassembly and assembly of the outer gear ring is relatively convenient and quick. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0014] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another angle;

[0015] Figure 3 This is a frontal structural diagram of the present invention;

[0016] Figure 4 This is a half-sectional view of the present invention from the side.

[0017] In the diagram: 1. Gear; 11. Front pin hole; 12. Rear pin hole; 13. Annular groove; a. Inner ring; b. Outer gear ring; 2. Front locating pin; 21. Front stud; 22. Front limit insertion hole; 3. Rear locating pin; 31. Rear stud; 32. Rear limit insertion hole; 4. Fastening nut; 5. Stop washer; 51. Main washer; 511. Insert plate; 512. Stop lug. Detailed Implementation

[0018] Example: See Figures 1 to 4 As shown, a modular gearbox gear includes a gear 1. The front end face of the gear 1 has several conical front pin holes 11 that penetrate the rear end face of the gear 1. The rear end face of the gear 1 has several conical rear pin holes 12 that penetrate the front end face of the gear 1. The gear 1 has an annular groove 13 that communicates with the front pin holes 11 and the rear pin holes 12, dividing the gear 1 into an inner ring a and an outer ring b. Conical front locating pins 2 and 3 are respectively inserted into the front pin holes 11 and 12 of the gear 1. A front stud 21 and a rear stud 31 are respectively formed on the rear end face of the front locating pin 2 and the front end face of the rear locating pin 3. The rear stud 31 and the front stud 21 extend out of the front and rear end faces of the gear 1 and pass through a retaining washer 5, where a fastening nut 4 is screwed in. The retaining washer 5 is clamped between the fastening nut 4 and the end face of the gear 1.

[0019] The central axis of the front pin hole 11 and the central axis of the rear pin hole 12 on the gear 1 are both located within the annular groove 13 of the gear 1, and the central axis of the annular groove 13 and the central axis of the gear 1 are on the same straight line; at least two front pin holes 11 and two rear pin holes 12 are provided, and the number of front pin holes 11 and the number of rear pin holes 12 are equal, and the front pin holes 11 and the rear pin holes 12 are evenly distributed in a ring around the central axis of the gear 1.

[0020] The conical angle of the inner wall of the front pin hole 11 on the gear 1 is equal to the conical angle of the outer wall of the front positioning pin 2, and the conical angle of the inner wall of the rear pin hole 12 is equal to the conical angle of the outer wall of the rear positioning pin 3. The lengths of the rear positioning pin 3 and the front positioning pin 2 are both less than the thickness of the gear 1.

[0021] The rear end face of the rear positioning pin 3 and the front end face of the front positioning pin 2 are respectively formed with a regular hexagonal rear limiting insertion hole 32 and a front limiting insertion hole 22.

[0022] The length of the rear positioning pin 3 is equal to the length of the front positioning pin 2.

[0023] The diameter of the inner wall at the front end of the front pin hole 11 is larger than the diameter of the inner wall at the rear end; the diameter of the inner wall at the front end of the rear pin hole 12 is smaller than the diameter of the inner wall at the rear end.

[0024] The locking washer 5 includes a "mountain"-shaped main washer 51, the middle of which is inserted into the front stud 21 or the rear stud 31. The two ends of the main washer 51 are bent into arc-shaped inserts 511, which are inserted into the annular grooves 13 on both sides of the front stud 21 or the rear stud 31. The middle of the main washer 51 has a plurality of locking lugs 512. The fastening nut 4 is an external hexagonal nut. The locking lugs 512 are bent and abut against the outer side wall of the fastening nut 4.

[0025] Working principle: This invention is a spliced ​​and combined gearbox gear. The main components of the gearbox gear are the inner ring a and the outer gear ring b. The outer gear ring b is used for transmission connection, and the inner ring a is used for heat fitting and fixing on the rotating shaft. The main wear part of the gearbox gear 1 is the teeth of gear 1, or the main part of gear 1 that breaks is the teeth of gear 1. When replacing, only the outer gear ring b needs to be replaced. The outer gear ring b and the inner ring a are fixed together by two sets of conical and oppositely oriented locating pins (front locating pin 2 and rear locating pin 3) with a threaded structure. When disassembling the outer gear ring b, simply remove the fastening nut 4 and take off the front locating pin 2 and the rear locating pin 3 to remove the outer gear ring b from the inner ring a. Disassembling and replacing the outer gear ring b is convenient and easy.

[0026] The embodiments described are illustrative of the invention and are not intended to limit the invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the invention; therefore, the scope of protection of the invention should be as set forth in the claims.

Claims

1. A modular gearbox gear, comprising gear (1), characterized in that: The front end face of the gear (1) is formed with several conical front pin holes (11) that penetrate the rear end face of the gear (1), and the rear end face of the gear (1) is formed with several conical rear pin holes (12) that penetrate the front end face of the gear (1). The gear (1) is formed with an annular groove (13) that communicates with the front pin holes (11) and the rear pin holes (12). The annular groove (13) divides the gear (1) into an inner ring (a) and an outer gear ring (b). The front pin holes of the gear (1) are formed with several conical front pin holes (11) that penetrate the rear end face of the gear (1). 11) and rear pin hole (12) are respectively inserted into conical front positioning pin (2) and rear positioning pin (3). The rear end face of the front positioning pin (2) and the front end face of the rear positioning pin (3) are respectively formed with front stud (21) and rear stud (31). The rear stud (31) and front stud (21) extend out of the front and rear end faces of the gear (1) and pass through the stop washer (5) to be screwed with fastening nut (4). The stop washer (5) is clamped between the fastening nut (4) and the end face of the gear (1). The central axis of the front pin hole (11) and the central axis of the rear pin hole (12) on the gear (1) are both located in the annular groove (13) of the gear (1), and the central axis of the annular groove (13) and the central axis of the gear (1) are on the same straight line; at least two front pin holes (11) and two rear pin holes (12) are provided, and the number of front pin holes (11) and the number of rear pin holes (12) are equal. The front pin holes (11) and the rear pin holes (12) are evenly distributed in a ring around the central axis of the gear (1); The cone angle of the inner wall of the front pin hole (11) on the gear (1) is equal to the cone angle of the outer wall of the front positioning pin (2), and the cone angle of the inner wall of the rear pin hole (12) is equal to the cone angle of the outer wall of the rear positioning pin (3). The lengths of the rear positioning pin (3) and the front positioning pin (2) are both less than the thickness of the gear (1). The rear end face of the rear positioning pin (3) and the front end face of the front positioning pin (2) are respectively formed with a regular hexagonal rear limiting insertion hole (32) and a front limiting insertion hole (22); The length of the rear positioning pin (3) is equal to the length of the front positioning pin (2); The diameter of the inner wall of the front end of the front pin hole (11) is greater than the diameter of the inner wall of the rear end; the diameter of the inner wall of the front end of the rear pin hole (12) is smaller than the diameter of the inner wall of the rear end. The stop washer (5) includes a "mountain" shaped main washer (51), the middle part of which is inserted into the front stud (21) or the rear stud (31), and the two ends of the main washer (51) are bent into arc-shaped inserts (511), which are inserted into the annular grooves (13) on both sides of the front stud (21) or the rear stud (31); the middle part of the main washer (51) is formed with several stop ears (512), and the fastening nut (4) is an external hexagonal nut, and the stop ears (512) are bent and abut against the outer side wall of the fastening nut (4).

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