A bi-directional gearbox input gear assembly

Abstract

The utility model provides a kind of two-way gear box input gear assembly, belong to mechanical technical field.It solves the problem of high maintenance cost of existing component.The utility model, gear box includes box, and positioning seat is shaped in the middle part of box inner cavity, input gear assembly includes bevel gear being set in box, and bevel gear is rotatably set on positioning seat by first bearing, and the opening that can be used for bevel gear to extend box is equipped in the top of box, and annular support seat is detachably fixed in opening, and input shaft is rotatably set in support seat, and both ends of input shaft are extended support seat;Input shaft is hollow and both ends are open setting;Bevel gear is equipped with the connecting hole for the lower end of input shaft insertion, and between the inner wall of connecting hole and input shaft is connected by spline;Bolt is equipped in input shaft, and thread hole one is opened on the bottom wall of connecting hole, and bolt head is pressed on the inner wall of input shaft, and bolt stem is rotated into corresponding thread hole one.This two-way gear box input gear assembly can reduce maintenance cost.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a bidirectional gearbox, particularly a bidirectional gearbox input gear assembly. Background Technology

[0002] A bidirectional gearbox is a mechanical device capable of transmitting power from a single power input to two directions or two outputs simultaneously. Its structure is illustrated in a bidirectional gearbox (CN205260733U) disclosed in the Chinese Patent Database. It includes a housing, a drive shaft and a first driven shaft vertically disposed within the housing, with meshing drive bevel gears mounted on the drive shaft and the first driven shaft, respectively. It also includes a second driven shaft coaxial with the drive shaft, on which a second driven bevel gear meshes with the first driven bevel gear. The transmission ratio between the drive shaft and the first driven shaft, and between the first driven shaft and the second driven shaft, is 1:1. All three gears—drive bevel gear, first driven bevel gear, and second driven bevel gear—are spiral bevel gears with a helix angle of 35 degrees.

[0003] In the aforementioned gearbox, one end of the drive shaft is connected to the power unit, and the other end is formed with a drive bevel gear for outputting power. The drive shaft and the drive bevel gear are an integral structure. Because the wear rates of the drive bevel gear and the drive shaft differ under actual operating conditions, when one component becomes excessively worn and needs replacement, the entire assembly must be replaced, resulting in high maintenance costs. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a bidirectional gearbox input gear assembly that can reduce maintenance costs.

[0005] The objective of this utility model can be achieved through the following technical solution: A bidirectional gearbox input gear assembly, the gearbox includes a housing, and a positioning seat is formed in the middle of the housing cavity. The input gear assembly includes a bevel gear disposed in the housing, and the bevel gear is rotatably disposed on the positioning seat through a first bearing. The top of the housing is provided with an opening for the bevel gear to extend out of the housing. A ring-shaped support seat is detachably fixed at the opening, and the support seat and the bevel gear are coaxially arranged. The characteristic is that an input shaft is rotatably disposed in the support seat, and both the upper and lower ends of the input shaft extend out of the support seat; the input shaft is hollow and both ends are open; the bevel gear is provided with a connecting hole for the lower end of the input shaft to be inserted, and the inner wall of the connecting hole and the input shaft are connected by a spline fit; a bolt is vertically disposed in the input shaft, and a threaded hole is vertically opened on the bottom wall of the connecting hole. The head of the bolt is pressed against the inner wall of the input shaft, and the shank of the bolt is screwed into the corresponding threaded hole.

[0006] During operation, the input shaft and bevel gear are connected by a spline joint, so that the input shaft can smoothly and accurately drive the bevel gear to output power.

[0007] The input shaft and bevel gear can be bolted together to form a single unit. This strengthens the connection between the input shaft and bevel gear, improving transmission stability and accuracy. The bevel gear can also be pulled out of the housing using the input shaft. Furthermore, after unscrewing the bolts, the input shaft and bevel gear can be made independent, facilitating individual replacement of the input shaft and bevel gear and reducing subsequent maintenance costs.

[0008] In the aforementioned bidirectional gearbox input gear assembly, the inner bore of the input shaft is a stepped bore, consisting of a large hole and a small hole that are connected and coaxially arranged, with the large hole positioned above the small hole. The bolt passes through the small hole, and the bolt head is pressed against the bottom wall of the large hole. This design offers advantages such as simple structure and convenient installation.

[0009] In the aforementioned bidirectional gearbox input gear assembly, a keyway is formed on the inner wall of the large bore. The length of the keyway extends along the axial direction of the input shaft, and the upper end of the keyway is open. The keyway facilitates connection with power equipment.

[0010] In the aforementioned bidirectional gearbox input gear assembly, the bottom of the input shaft features a guide ring coaxial with the input shaft. The guide ring has a conical ring structure, and its diameter gradually decreases from top to bottom. A conical surface matching the guide ring is formed on the upper inner wall of the threaded hole, and the outer surface of the guide ring rests against the conical surface. The fit between the guide ring and the conical surface forces the coaxiality of the input shaft and the bevel gear, further improving transmission accuracy.

[0011] In the aforementioned bidirectional gearbox input gear assembly, the support base has an annular shoulder that presses against the top wall of the gearbox body, and the shoulder is detachably fixed to the gearbox body by a ring of screws.

[0012] In the aforementioned bidirectional gearbox input gear assembly, an annular groove is provided on the bottom wall of the shoulder, and a sealing ring is provided in the annular groove. The two ends of the sealing ring are in contact with the top wall of the gearbox and the bottom wall of the annular groove, respectively, for sealing.

[0013] In the aforementioned bidirectional gearbox input gear assembly, a second threaded hole is vertically formed on the top wall of the support base. This second threaded hole is a blind hole. The second threaded hole is provided for connecting the support base to the power equipment, facilitating installation.

[0014] Compared with existing technologies, this bidirectional gearbox input gear assembly has the following advantages: 1. The input shaft and bevel gear can be connected by bolts to form a whole. This not only strengthens the connection between the input shaft and bevel gear, improving transmission stability and accuracy, but also allows the bevel gear to be pulled out of the housing with the help of the input shaft. At the same time, after unscrewing the bolts, the input shaft and bevel gear can be made independent of each other, so as to facilitate the replacement of the input shaft and bevel gear separately, thereby reducing subsequent maintenance costs.

[0015] 2. The guide ring and conical surface fit together to forcefully correct the coaxiality of the input shaft and bevel gear, further improving transmission accuracy. Attached Figure Description

[0016] Figure 1 This is a cross-sectional schematic diagram of a two-way gearbox.

[0017] Figure 2 yes Figure 1 Enlarged diagram of point A in the middle.

[0018] In the diagram, 1. Housing; 1a. Positioning seat; 1b. Opening; 2. Bevel gear; 2a. Shaft; 2b. Connecting hole; 3. First bearing; 4. Support seat; 4a. Shoulder; 4b. Threaded hole two; 5. Input shaft; 5a. Annular shoulder; 5b. Large hole; 5c. Keyway one; 5d. Guide ring; 6. Bolt; 7. Second bearing; 8. Screw; 9. Sealing ring. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] like Figure 1 As shown, in the input gear assembly of the bidirectional gearbox, the gearbox includes a housing 1, and a positioning seat 1a is formed in the center of the inner cavity of the housing 1. In the actual product, the positioning seat 1a and the housing 1 are an integral structure.

[0021] This input gear assembly includes a bevel gear 2 housed within a housing 1, and the bevel gear 2 is rotatably mounted on a positioning seat 1a via a first bearing 3. Specifically, a shaft 2a is vertically formed at the bottom of the bevel gear 2, and the positioning seat 1a has a mounting hole for inserting the shaft 2a. The first bearing 3 is disposed in the mounting hole, and the type of the first bearing 3 is a ball bearing, with its inner and outer rings fixedly connected to the shaft 2a and the positioning seat 1a, respectively. In actual products, both the inner and outer rings of the first bearing 3 are connected to the shaft 2a and the positioning seat 1a via an interference fit.

[0022] like Figure 1 and Figure 2As shown, the top of the housing 1 has an opening 1b for the bevel gear 2 to extend out of the housing 1, meaning that the size of the opening 1b is larger than the outer diameter of the bevel gear 2. A ring-shaped support 4 is detachably fixed at the opening 1b, and the support 4 and the bevel gear 2 are coaxially arranged. An input shaft 5 is rotatably mounted inside the support 4, with both its upper and lower ends extending out of the support 4. The input shaft 5 is hollow, with openings 1b at both ends. The bevel gear 2 has a connecting hole 2b for the lower end of the input shaft 5 to be inserted, and the inner wall of the connecting hole 2b is connected to the input shaft 5 via a spline fit. A bolt 6 is vertically mounted inside the input shaft 5, and a threaded hole matching the bolt 6 is vertically opened on the bottom wall of the connecting hole 2b. The head of the bolt 6 is pressed against the inner wall of the input shaft 5, and the shank of the bolt 6 is screwed into the corresponding threaded hole.

[0023] During operation, the input shaft 5 and the bevel gear 2 are connected by a spline joint, so that the input shaft 5 can smoothly and accurately drive the bevel gear 2 to output power.

[0024] The input shaft 5 and the bevel gear 2 can be connected as a whole by bolts 6. This not only strengthens the connection between the input shaft 5 and the bevel gear 2, improving transmission stability and accuracy, but also allows the bevel gear 2 to be pulled out of the housing 1 with the help of the input shaft 5. At the same time, after unscrewing the bolts 6, the input shaft 5 and the bevel gear 2 can be made independent of each other, so as to facilitate the replacement of the input shaft 5 and the bevel gear 2 separately, thereby reducing subsequent maintenance costs.

[0025] in, The connection between the support base 4 and the input shaft 5 is as follows: A second bearing 7 is coaxially mounted inside the support base 4. The second bearing 7 is also a ball bearing, and it includes an inner ring and an outer ring. The inner and outer rings of the second bearing 7 form an interference fit with the input shaft 5 and the support base 4, respectively. Further, an annular shoulder 5a is formed on the lower outer wall of the input shaft 5, and a retaining ring is mounted on the input shaft 5. The two end faces of the inner ring of the second bearing 7 press against the retaining ring and the annular shoulder 5a, respectively. An annular limiting seat is formed on the inner wall of the support base 4, and the bottom wall of the outer ring of the second bearing 7 presses against the limiting seat, thereby axially stabilizing and limiting the second bearing 7, ensuring smooth rotation of the input shaft 5.

[0026] The spline fit between the inner wall of the connecting hole 2b and the input shaft 5 is as follows: A ring of key blocks is formed on the outer wall of the lower end of the input shaft 5, and the length of the key blocks extends along the axial direction of the input shaft 5. A ring of keyways II, matching the key blocks, is formed on the inner wall of the connecting hole 2b. The number of key blocks and keyways II are the same, and their positions correspond one-to-one. Each key block is inserted into the corresponding keyway II, so that a stable circumferential fit is formed between the input shaft 5 and the bevel gear 2.

[0027] The positioning method for bolt head 6 is as follows: (e.g.) Figure 2As shown, the inner hole of the input shaft 5 is a stepped hole, consisting of a large hole 5b and a small hole that are connected and coaxially arranged, with the large hole 5b positioned above the small hole. A ring of keyways 5c is formed on the inner wall of the large hole 5b, and another ring of keyways 5c is evenly distributed circumferentially along the input shaft 5. The length of keyways 5c extends axially along the input shaft 5, and the upper end of keyways 5c is open. The keyways 5c facilitate connection to power equipment. The head of the bolt 6 is pressed against the bottom wall of the large hole 5b. This design offers advantages such as simple structure and convenient installation.

[0028] To further explain, the bottom of the input shaft 5 has a guide ring 5d coaxial with it, and the guide ring 5d and the input shaft 5 are an integral structure. The guide ring 5d has a conical ring structure, and its diameter gradually decreases from top to bottom. The upper inner wall of the threaded hole 1 is formed with a conical surface that matches the guide ring 5d, and the outer side of the guide ring 5d is attached to the conical surface. The cooperation between the guide ring 5d and the conical surface can forcibly correct the coaxiality of the input shaft 5 and the bevel gear 2, further improving the transmission accuracy.

[0029] In this embodiment, the support base 4 is installed as follows: The support base 4 is inserted into the opening 1b. The upper outer wall of the support base 4 has an annular shoulder 4a, and the shoulder 4a and the support base 4 are coaxially arranged. The shoulder 4a presses against the top wall of the housing 1, and is detachably fixed to the housing 1 by a ring of screws 8. The ring of screws 8 is distributed circumferentially along the input shaft 5 and is vertically arranged. Further, an annular groove is formed on the bottom wall of the shoulder 4a, and a sealing ring 9 is provided within the annular groove. The two end faces of the sealing ring 9 respectively contact and seal with the top wall of the housing 1 and the bottom wall of the annular groove. A ring of threaded holes 4b is also vertically formed on the top wall of the support base 4. The ring of threaded holes 4b is evenly distributed circumferentially along the input shaft 5, and the type of threaded holes 4b is blind holes. The threaded holes 4b are provided for connecting the support base 4 to the power equipment, facilitating installation.

[0030] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A bidirectional gearbox input gear assembly, the gearbox including a housing (1), and a positioning seat (1a) formed in the middle of the inner cavity of the housing (1), the input gear assembly including a bevel gear (2) disposed in the housing (1), and the bevel gear (2) being rotatably disposed on the positioning seat (1a) via a first bearing (3), the top of the housing (1) having an opening (1b) for the bevel gear (2) to extend out of the housing (1), and a ring-shaped support seat (4) detachably fixed at the opening (1b), and the support seat (4) and the bevel gear (2) being coaxially arranged, characterized in that, An input shaft (5) is rotatably installed inside the support base (4), and both the upper and lower ends of the input shaft (5) extend out of the support base (4); the input shaft (5) is hollow and both ends are open (1b); the bevel gear (2) is provided with a connecting hole (2b) for the lower end of the input shaft (5) to be inserted, and the inner wall of the connecting hole (2b) and the input shaft (5) are connected by a spline fit; a bolt (6) is vertically installed inside the input shaft (5), and a threaded hole is vertically opened on the bottom wall of the connecting hole (2b), the head of the bolt (6) is pressed against the inner wall of the input shaft (5), and the shank of the bolt (6) is screwed into the corresponding threaded hole.

2. The bidirectional gearbox input gear assembly according to claim 1, characterized in that, The inner hole of the input shaft (5) is a stepped hole, which consists of a large hole (5b) and a small hole that are connected and coaxially arranged. The large hole (5b) is located above the small hole. The bolt (6) is inserted into the small hole, and the head of the bolt (6) is pressed against the bottom wall of the large hole (5b).

3. The bidirectional gearbox input gear assembly according to claim 2, characterized in that, A keyway 1 (5c) is formed on the inner wall of the large hole (5b). The length of the keyway 1 (5c) extends along the axial direction of the input shaft (5), and the upper end of the keyway 1 (5c) is open.

4. The bidirectional gearbox input gear assembly according to claim 1, characterized in that, The bottom of the input shaft (5) is a guide ring (5d) coaxial with the input shaft (5). The guide ring (5d) is a conical ring structure, and the diameter of the guide ring (5d) gradually decreases from top to bottom. The upper inner wall of the threaded hole has a conical surface that matches the guide ring (5d), and the outer side of the guide ring (5d) is attached to the conical surface.

5. The bidirectional gearbox input gear assembly according to claim 1, characterized in that, The support base (4) has an annular shoulder (4a) that presses against the top wall of the box (1) and is detachably fixed to the box (1) by a ring of screws (8).

6. The bidirectional gearbox input gear assembly according to claim 5, characterized in that, An annular groove is provided on the bottom wall of the shoulder (4a), and a sealing ring (9) is provided in the annular groove. The two ends of the sealing ring (9) are in contact with the top wall of the box (1) and the bottom wall of the annular groove respectively to seal.

7. The bidirectional gearbox input gear assembly according to claim 6, characterized in that, The top wall of the support base (4) is also vertically provided with a ring of threaded holes (4b), and the type of threaded holes (4b) is blind holes.

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