Transmission gear assembly

Abstract

The utility model provides a transmission gear assembly, and belongs to the technical field of machinery. The problem that an existing transmission mechanism is poor in precision is solved. The transmission gear assembly comprises two coaxially-arranged cylinders, the adjacent end faces of the two cylinders are attached together, gear rings are formed on the inner sides of the ends, away from each other, of the two cylinders, gear shafts are inserted into the two cylinders, the two gear shafts are meshed with the two gear rings respectively, the two cylinders are fixed together through a circle of bolt and nut assembly, and the bolt and nut assembly comprises a bolt. Through holes allowing the rod parts of the bolts to penetrate through are formed in the cylinders, the number of the through holes in each cylinder is the same as that of the bolts, the through holes are stepped holes, the through holes are composed of large holes and small holes which are communicated with each other, and the two large holes are located between the two small holes; the large holes are round holes, the same circular ring body is clamped in the two large holes corresponding in position, and the circular ring body is arranged outside the corresponding bolt rod part in a sleeving mode. The transmission gear assembly is high in precision.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to a gear, in particular to a transmission gear assembly. Background Art

[0002] Gear transmission is a widely used mechanical transmission method that transmits motion and power through the mutual meshing of one or more pairs of gears.

[0003] Existing gear transmission, such as a gear coupling structure for a crane disclosed in the China Patent Library (application number: 201220214741.6), includes a coupling, on which are provided two groups of internal gears and external gears, the internal gears are provided with a sealing mechanism, and the sealing mechanism is composed of a sealing ring, a retaining ring, a retaining ring and an expansion ring, an oil cup is provided on the left external gear, and a paper pad is provided between the left internal gear and the right internal gear; the left internal gear and the right internal gear are connected by bolts and nuts.

[0004] In the above coupling, the two internal gears are connected by bolts and nuts, and the coaxiality between the two is not very high, which affects the transmission accuracy and stability. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a transmission gear assembly with high transmission accuracy.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a transmission gear assembly, including two coaxially arranged cylinders, the adjacent end faces of the two cylinders are attached together, the inner sides of the ends of the two cylinders that are far away from each other are formed with gear rings, gear shafts are inserted into the two cylinders, and the two gear shafts are respectively meshed with the two gear rings, and the two cylinders are fixed together by a circle of bolt and nut assemblies, the bolt and nut assembly includes bolts, and the cylinders are provided with through holes for the bolt rods to pass through, the number of through holes on each cylinder is the same as the bolts and the positions correspond one to one, and it is characterized in that the type of the through hole is a step hole, and the two through holes corresponding to the positions on the two cylinders are symmetrically arranged; the through hole is composed of a large hole and a small hole connected to each other, and the two large holes are located between the two small holes; the type of the large hole is a circular hole, and the same annular body is clamped in the two large corresponding holes, the shape and size of the annular body match the large hole, and the annular body is sleeved outside the corresponding bolt rod.

[0007] The same annular body is arranged in the two corresponding holes, and the outer circumference of the annular body is completely fitted with the inner circumference of the large hole to forcibly correct the positions of the two cylinders, greatly improve the coaxiality of the two cylinders, and make the entire transmission more stable and accurate.

[0008] In the above transmission gear assembly, arc bars are provided between two adjacent torus bodies, the arc bars and the cylinder are coaxially arranged, and the two ends of the arc bars are connected to the corresponding two torus bodies respectively; an arc groove for accommodating the arc bars is provided on the end face of one of the cylinder bodies, the arc bars and the arc grooves are the same in number and have one-to-one corresponding positions, and the two ends of the arc grooves are connected to the corresponding two large holes respectively. The arc bars are used to connect multiple torus bodies to form a whole, so that multiple torus bodies can be inserted at one time during assembly, so as to simplify the assembly steps and facilitate assembly.

[0009] In the above-mentioned transmission gear assembly, the arc strip and the annular body are an integrated structure to effectively enhance the connection strength between the two.

[0010] In the above-mentioned transmission gear assembly, the arc strip and the annular body are both made of plastic material and are integrally formed by injection molding to facilitate processing and molding.

[0011] In the above-mentioned transmission gear assembly, the cross section of the arc bar is T-shaped to enhance the strength of the arc bar itself, so that the whole formed by the arc bar and the annular body has a certain strength, which is convenient for assembly.

[0012] In the above-mentioned transmission gear assembly, the arc strip is pressed on the bottom surface of the corresponding arc groove.

[0013] In the above transmission gear assembly, the inner side surfaces of the annular body at the two ends are both conical surfaces, and the two conical surfaces on the same annular body are symmetrically arranged. The design of the conical surface allows the bolts to pass through the annular body smoothly regardless of the direction in which they are installed, which is convenient for assembly.

[0014] In the above-mentioned transmission gear assembly, an annular groove coaxial with the cylinder is opened on the end face of one of the cylinders, an annular sealing gasket is arranged in the annular groove, and the two end faces of the annular sealing gasket are respectively pressed on the bottom face of the annular groove and the end face of the other cylinder to enhance the sealing performance formed between the two cylinders.

[0015] In the above-mentioned transmission gear assembly, the annular body is located outside the annular sealing gasket.

[0016] In the above transmission gear assembly, the ends of the two gear shafts that are far away from each other extend out of the corresponding two cylinders respectively, and the two gear shafts are sealed with the inner walls of the two cylinders respectively through annular oil seals, and the two gear rings are located between the two annular oil seals.

[0017] With the cooperation of the annular sealing gasket and the annular oil seal, the meshing position of the gear ring and the gear shaft is in a closed space, which not only delays the wear of the gear ring and the gear shaft and extends the service life of the gear assembly, but also improves the operating stability of the gear assembly.

[0018] Compared with the prior art, the transmission gear assembly has the following advantages:

[0019] 1. The same annular body is installed in the two corresponding holes, and the outer circumference of the annular body is completely fitted with the inner circumference of the large hole to force the position of the two cylinders to be corrected, greatly improving the coaxiality of the two cylinders and making the entire transmission more stable and accurate.

[0020] 2. Use arc bars to connect multiple circular rings to form a whole, so that multiple circular rings can be inserted at one time during assembly to simplify the assembly steps and facilitate assembly.

[0021] 3. With the cooperation of the annular sealing gasket and the annular oil seal, the meshing position of the gear ring and the gear shaft is in a closed space, which not only delays the wear of the gear ring and the gear shaft, prolongs the life of the gear assembly, but also improves the operating stability of the gear assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of the transmission gear assembly.

[0023] Figure 2 : is a cross-sectional schematic diagram of the transmission gear assembly.

[0024] Figure 3 It is a schematic diagram of the connection between the arc bar and the torus.

[0025] Figure 4 It is a three-dimensional schematic diagram of the cylinder.

[0026] In the figure, 1, cylinder; 1a, gear ring; 1b, through hole; 1b1, large hole; 1b2, small hole; 1c, arc groove; 2, gear shaft; 3, bolt; 4, annular body; 5, arc strip; 6, annular sealing gasket; 7, annular oil seal. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0028] like Figure 1 and Figure 2 As shown, the transmission gear assembly includes a coaxially arranged cylinder 1 and a gear shaft 2, and there are two cylinders 1 and two gear shafts 2. In actual products, the two cylinders 1 are symmetrically arranged; the two gear shafts 2 are also symmetrically arranged.

[0029] Specifically,

[0030] The adjacent end faces of the two cylinders 1 are attached together, and the inner sides of the ends of the two cylinders 1 that are far away from each other are integrally formed with a gear ring 1a. The two cylinders 1 are fixed together by a circle of bolt and nut assemblies, which are prior art and will not be described in detail here. The bolt and nut assembly includes a bolt 3, and a through hole 1b is provided on the cylinder 1 for the rod of the bolt 3 to pass through. The number of through holes 1b on each cylinder 1 is the same as that of the bolt 3 and the positions correspond one to one.

[0031] One end of the two gear shafts 2 is inserted into the two cylinders 1 respectively, and the ends of the two gear shafts 2 that are far away from each other extend out of the corresponding cylinders 1. The gear shaft 2 has a gear that matches the gear ring 1a, and the two gears are meshed with the two gear rings 1a respectively.

[0032] like Figure 2 and Figure 4 As shown, the through hole 1b is a stepped hole, and the two through holes 1b corresponding to each other on the two cylinders 1 are symmetrically arranged. The through hole 1b is composed of a large hole 1b1 and a small hole 1b2 connected to each other, and the two large holes 1b1 are located between the two small holes 1b2. The large hole 1b1 is a circular hole, and the same annular body 4 is provided inside the two large holes 1b1 corresponding to each other. The shape and size of the annular body 4 match the large hole 1b1, and the annular body 4 is sleeved on the outside of the corresponding bolt 3 rod. Further explanation: the inner side surfaces of the annular body 4 at the two ports are both conical surfaces, and the two conical surfaces on the same annular body 4 are symmetrically arranged. The design of the conical surface enables the bolt 3 to pass through the annular body 4 smoothly regardless of the direction in which it is installed, which is convenient for assembly.

[0033] The same annular body 4 is clamped in the two corresponding large holes 1b1, and the outer circumference of the annular body 4 is completely fitted with the inner circumference of the large hole 1b1 to force the position of the two cylinders 1 to be corrected, greatly improving the coaxiality of the two cylinders 1 and making the entire transmission more stable and accurate.

[0034] like Figure 3 and Figure 4 As shown, arc bars 5 are provided between two adjacent torus bodies 4, the arc bars 5 and the cylinder body 1 are coaxially arranged, and the two ends of the arc bars 5 are respectively connected to the corresponding two torus bodies 4. An arc groove 1c for accommodating the arc bars 5 is provided on the end face of one of the cylinder bodies 1, the arc bars 5 and the arc grooves 1c are the same in number and have one-to-one corresponding positions, and the two ends of the arc groove 1c are respectively connected to the corresponding two large holes 1b1. The arc bars 5 are used to connect multiple torus bodies 4 to form a whole, so that multiple torus bodies 4 can be inserted at one time during assembly to simplify the assembly steps and facilitate assembly. Preferably, the arc bars 5 are pressed on the bottom surface of the corresponding arc groove 1c.

[0035] In this embodiment, the arc bar 5 and the annular body 4 are an integrated structure to effectively enhance the connection strength between the two. Preferably, the arc bar 5 and the annular body 4 are both made of plastic material and are integrally formed by injection molding, and the cross section of the arc bar 5 is T-shaped to enhance the strength of the arc bar 5 itself, so that the whole formed by the arc bar 5 and the annular body 4 has a certain strength, which is convenient for assembly.

[0036] like Figure 2 As shown, an annular groove coaxial with the cylinder 1 is provided on the end face of one of the cylinders 1, and an annular sealing gasket 6 is provided in the annular groove, and the two end faces of the annular sealing gasket 6 are respectively pressed on the bottom face of the annular groove and the end face of the other cylinder 1 to enhance the sealing performance formed between the two cylinders 1. The two gear shafts 2 are respectively sealed with the inner walls of the two cylinders 1 through annular oil seals 7, and the two gear rings 1a are located between the two annular oil seals 7. With the cooperation of the annular sealing gasket 6 and the annular oil seal 7, the meshing position of the gear ring 1a and the gear shaft 2 is in a closed space, which not only delays the wear of the gear ring 1a and the gear shaft 2, prolongs the service life of the gear assembly, but also improves the running stability of the gear assembly.

[0037] Preferably, the annular body 4 is located outside the annular sealing gasket 6 .

[0038] In actual products, the gear shaft 2 is hollow, and a keyway is axially penetrated on the inner wall of the gear shaft 2 to facilitate the connection between the gear shaft 2 and the equipment for transmission.

[0039] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A transmission gear assembly, comprising two coaxially arranged cylinders (1), the adjacent end surfaces of the two cylinders (1) being attached together, the inner sides of the ends of the two cylinders (1) being separated from each other are both formed with gear rings (1a), the two cylinders (1) are both inserted with gear shafts (2), and the two gear shafts (2) are respectively meshed with the two gear rings (1a), the two cylinders (1) are fixed together by a circle of bolt and nut assemblies, the bolt and nut assemblies include bolts (3), the cylinders (1) are provided with through holes (1b) for the rods of the bolts (3) to pass through, the number of through holes (1b) on each cylinder (1) is the same as the number of bolts (3) and the positions are one-to-one corresponding, and the characteristics are as follows: The through hole (1b) is a stepped hole, and the two through holes (1b) at corresponding positions on the two cylinders (1) are symmetrically arranged; the through hole (1b) is composed of a large hole (1b1) and a small hole (1b2) that are connected, and the large holes (1b1) are located between the two small holes (1b2); the large hole (1b1) is a circular hole, and the same annular body (4) is disposed inside the two large holes (1b1) at corresponding positions, the shape and size of the annular body (4) are matched with the large hole (1b1), and the annular body (4) is sleeved outside the rod of the corresponding bolt (3).

2. The transmission gear assembly according to claim 1, characterized in that: An arc bar (5) is provided between two adjacent circular ring bodies (4), the arc bar (5) and the cylinder (1) are coaxially arranged, and the two ends of the arc bar (5) are respectively connected to the corresponding two circular ring bodies (4); an arc groove (1c) for accommodating the arc bar (5) is provided on the end surface of one of the cylinders (1), the arc bars (5) and the arc grooves (1c) are the same in number and have one-to-one corresponding positions, and the two ends of the arc groove (1c) are respectively connected to the corresponding two large holes (1b1).

3. The transmission gear assembly according to claim 2, characterized in that: The arc strip (5) and the annular body (4) are an integrated structure.

4. The transmission gear assembly according to claim 3, characterized in that: The arc strip (5) and the annular body (4) are both made of plastic material and are integrally formed by injection molding.

5. The transmission gear assembly according to claim 3 or 4, characterized in that: The cross section of the arc strip (5) is T-shaped.

6. The transmission gear assembly according to claim 2, 3 or 4, characterized in that: The arc strip (5) is pressed onto the bottom surface of the corresponding arc groove (1c).

7. The transmission gear assembly according to claim 1, characterized in that: The inner side surfaces of the annular body (4) at the two ends are both conical surfaces, and the two conical surfaces on the same annular body (4) are symmetrically arranged.

8. The transmission gear assembly according to claim 1, characterized in that: An annular groove coaxial with the cylinder (1) is provided on the end surface of one of the cylinders (1), an annular sealing gasket (6) is provided in the annular groove, and both end surfaces of the annular sealing gasket (6) are pressed against the bottom surface of the annular groove and the end surface of the other cylinder (1) respectively.

9. The transmission gear assembly according to claim 8, characterized in that: The annular body (4) is located outside the annular sealing gasket (6).

10. The transmission gear assembly according to claim 8 or 9, characterized in that: The ends of the two gear shafts (2) that are separated from each other extend out of the corresponding two cylinders (1), and the two gear shafts (2) are sealed with the inner walls of the two cylinders (1) through annular oil seals (7).

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