An eccentric gear chamber structure, gear train and engine

Abstract

The present application relates to gear transmission technical field, especially a kind of eccentric gear chamber structure, gear train and engine, including power machine body shell, with circular chamber;Transmission gear, for meshing with the other gear of power machine body, and through the configuration gear shaft, power output is carried out, the gear shaft is eccentric in the circular chamber, the transmission gear is detachably connected with the gear shaft;End cover, with the power machine body shell rotation cooperation and can be positioned in set angle, the gear shaft follows the end cover rotation and revolves around the central axis of the circular chamber;The interface angle and eccentric amount and eccentric position of the present application can be adjusted by the requirement of speed ratio change, solve the problem of gear transmission system redesign caused by speed ratio change.

Description

Technical Field

[0001] This invention relates to the field of gear transmission technology, and in particular to an eccentric gear chamber structure, a gear system, and an engine. Background Technology

[0002] Gear transmission refers to a device that transmits motion and power through a pair of gears. Specifically, a pair of gears with the same module mesh to transmit power from shaft A to shaft B, thus completing the power transmission. It is one of the most widely used mechanical transmission methods in modern equipment. Power is generally output through gear transmission, and the gears are related to the functional interface.

[0003] In existing design schemes, when the functional interface has insufficient or excessive capabilities, the speed ratio of the gear transmission pair is generally adjusted. However, changes in the speed ratio will cause changes in the center distance of the gear pair. In this case, if the speed ratio needs to be changed, the traditional design scheme requires a complete redesign of the gear system. This necessitates redesigning the gear chamber and gear chamber cover, redeveloping the mold, extending the product cycle, and increasing the investment costs. Summary of the Invention

[0004] The purpose of this invention is to provide an eccentric gear chamber structure, gear train, and engine to solve the problem of redesigning gear transmission systems due to speed ratio changes in the prior art. To achieve the above objective, this invention provides the following technical solution:

[0005] In a first aspect, the present invention provides an eccentric gear chamber structure, comprising:

[0006] The outer casing of the power unit has a circular chamber;

[0007] A transmission gear is used to mesh with other gears of the power unit and to output power through a gear shaft. The gear shaft is eccentrically located in the circular cavity, and the transmission gear is detachably connected to the gear shaft.

[0008] The end cap rotates with the outer shell of the power unit and can be positioned at a set angle. The gear shaft rotates with the end cap and revolves around the central axis of the circular chamber.

[0009] As a further technical solution, the input end of the gear shaft is provided with a fastening bolt that mates with its internal thread, and the transmission gear is mounted on the gear shaft by means of the fastening bolt.

[0010] As a further technical solution, the output end of the gear shaft is provided with an internal spline.

[0011] As a further technical solution, the end cover is provided with a positioning stop, the positioning stop having a first annular mating surface and a second annular mating surface, the power body shell having a third annular mating surface that mates with the first annular mating surface, and a fourth annular mating surface that mates with the second annular mating surface.

[0012] As a further technical solution, the positioning stop and the outer shell of the power unit are provided with a sealing structure.

[0013] As a further technical solution, the sealing structure is an O-ring.

[0014] As a further technical solution, the end cover is provided with a number of holes evenly spaced around its circumference, and the power unit housing is provided with positioning holes that mate with different of the holes, and the holes are bolted to the positioning holes.

[0015] As a further technical solution, the gear shaft is engaged with the end cover by a bearing and rotates by the bearing.

[0016] In a second aspect, the present invention provides a gear system comprising a plurality of shafts located on a plurality of axes that are different from each other and a plurality of gears respectively arranged on the plurality of said shafts, at least one of said gears being an internal gear, wherein the gear at the power transmission end is configured with an eccentric gear chamber structure as in the first aspect.

[0017] Thirdly, the present invention provides an engine that uses the gear system as described in the second aspect.

[0018] The beneficial effects of the present invention are as follows:

[0019] (1) The transmission gear, gear shaft, and circular chamber of this invention form an eccentric structure, which can modularly integrate the functional requirements of gear transmission and hydraulic pump, solve the interface conversion problem, and adjust the center distance of the gear pair through the eccentric structure, thereby achieving the purpose of increasing or decreasing the gear ratio. It improves the versatility of gear structure and interface function. The interface angle, eccentricity, and eccentricity position can be adjusted according to the requirements of speed ratio changes, solving the problem of redesigning the gear transmission system due to speed ratio changes.

[0020] (2) This invention improves the structural compactness and manufacturability of components through the modularization and integration of gear structure and eccentric gear chamber. By separating complex dimensional fits and precise transmission requirements into a single structure, the processing difficulty of components is reduced and the fitting accuracy is improved.

[0021] (3) The present invention can achieve the stopping and rotation of the end cover by the cooperation of the positioning stop and the power body shell, and at the same time, the positioning of the end cover after rotation can be achieved by the cooperation of the hole on the end cover and the positioning hole on the power body shell. Attached Figure Description

[0022] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute a limitation thereof. It should also be understood that these drawings are for simplicity and clarity and are not necessarily drawn to scale. The invention will now be described and explained with additional features and details using the drawings, wherein:

[0023] Figure 1 A schematic cross-sectional view of the eccentric gear chamber structure in an embodiment of the present invention is shown;

[0024] Figure 2 This shows a cross-sectional view of the eccentric gear chamber structure and the power unit housing assembly in an embodiment of the present invention;

[0025] Figure 3 This shows a front view schematic diagram of a power unit equipped with an eccentric gear chamber structure in an embodiment of the present invention;

[0026] Figure 4 A rear view schematic diagram of a power unit equipped with an eccentric gear chamber structure is shown in an embodiment of the present invention.

[0027] In the figure: 1. Transmission gear; 2. Gear shaft; 3. Fastening bolt; 4. Locating stop; 5. Bearing; 6. Snap ring; 7. End cover; 8. Gasket; 9. Power unit housing; 10. Circular chamber; 11. Gear; 12. Hole; 13. Internal spline of shaft; 14. First annular mating surface; 15. Second annular mating surface. Detailed Implementation

[0028] The technical solutions in typical embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0029] Example 1

[0030] like Figure 1 and Figure 2 As shown, this embodiment provides an eccentric gear chamber structure, including:

[0031] The outer casing of the power unit 9 has a circular chamber 10;

[0032] The transmission gear 1 is used to mesh with other gears 1 of the power unit and to output power through the gear shaft 2. The gear shaft 2 is eccentrically located in the circular cavity 10. The transmission gear 1 and the gear shaft 2 are detachably connected.

[0033] The end cover 7 rotates with the outer shell 9 of the power unit and can be positioned at a set angle. The gear shaft 2 rotates with the end cover 7 and revolves around the central axis of the circular chamber 10.

[0034] It should be noted that the output end of gear shaft 2 is connected to a hydraulic pump, etc.

[0035] The transmission gear 1, gear shaft 2, and circular chamber 10 form an eccentric structure, which modularly integrates the functional requirements of gear transmission and hydraulic pump, solves interface conversion problems, and allows adjustment of the center distance of the gear pair through the eccentric structure, thereby achieving the purpose of increasing or decreasing the gear ratio. This improves the versatility of the gear structure and interface function; the interface angle, eccentricity, and eccentric position can be adjusted according to the requirements of speed ratio changes, solving the problem of redesigning the gear transmission system due to speed ratio variations.

[0036] It can be applied to different machine models, different structural positions, or different functional interfaces. The modular structure can be reused as a whole simply by changing the eccentricity of the eccentric gear chamber structure.

[0037] Multiple components can be integrated into an eccentric gear chamber structure, which effectively reduces the difficulty of design and development, makes better use of limited space, and makes it more compact in the power unit (such as an engine), with higher space utilization. The eccentricity of the eccentric structure can be used to adjust the center distance of the gear pair.

[0038] The end cap 7 rotates and engages with the outer casing 9 of the power unit and can be positioned at a set angle.

[0039] like Figure 1 and Figure 2 As shown, the end cover 7 is provided with a positioning stop 4, which has a first annular mating surface 14 and a second annular mating surface 15. The power body shell 9 has a third annular mating surface that mates with the first annular mating surface 14 and a fourth annular mating surface that mates with the second annular mating surface 15.

[0040] In essence, the cross-section of the positioning stop 4 is a right-angled notch. In order to achieve limiting and rotation, the power unit housing 9 is provided with a right-angled cross-section that cooperates with the positioning stop 4. This not only achieves the stopping and limiting, but also enables the relative rotation of the eccentric gear chamber and the power unit housing 9 through the fixed position of the screw hole of the power unit housing 9.

[0041] like Figure 1 and Figure 2 As shown, the positioning stop 4 and the power unit housing 9 are provided with a sealing structure. The sealing structure is an O-ring seal.

[0042] A plurality of holes 12 are evenly spaced on the circumference of the end cover 7 (the circumferential direction of the assembly surface). The power unit housing 9 is provided with positioning holes that mate with different holes 12, and the holes 12 are bolted to the positioning holes. In this embodiment, for example... Figure 4 As shown, three holes are provided for hole 12, and three positioning holes are also provided for the outer shell 9 of the power unit.

[0043] When the center distance needs to be adjusted, rotate the end cap 7 so that the hole 12 mates with the positioning hole for positioning. In some other embodiments, the number of holes 12 and positioning holes does not necessarily have to be the same, nor is it limited to the three in this embodiment.

[0044] By calculating the change in the transmission ratio of the entire gear transmission system, the change in the center distance of the gear pair is determined. Based on the change in the center distance, the eccentricity and eccentric position of the gear shaft 2 are determined. The center distance requirement of the gear pair is met by rotating and positioning the end cover 7.

[0045] The input end of the gear shaft 2 is provided with a fastening bolt 3 that mates with its internal thread. The transmission gear 1 is installed on the gear shaft 2 by fastening bolt 3, which can realize the detachable connection between the transmission gear 1 and the gear shaft 2. After the center distance is adjusted, the gear with the corresponding parameters can be replaced.

[0046] The external gear tooth profile parameters of the gear transmission can be designed and adjusted according to the parameters of different gear trains. It is highly interchangeable, and different external gear parameters can be matched and adjusted with this structure.

[0047] The output end of gear shaft 2 is provided with an internal spline 13. The internal spline 13 adopts the SAE standard spline matched with the hydraulic pump, which improves the market versatility and interchangeability.

[0048] The gear shaft 2 and end cover 7 are fitted together by bearings 5, and the gear shaft rotates on its own axis via bearings 5. Specifically, after assembly, the gear structure is fastened to the eccentric gear chamber structure by a pair of bearings 5. Two parallel bearings 5 ​​are provided at the support end of the gear shaft 2 to increase the reliability of the support and improve the bearing's radial force bearing capacity. The inner diameter of the gear shaft 2 and bearing 5 are fitted together, and the outer diameter of the bearing 5 is fitted together with the internal structure of the end cover 7. The internal structure of the end cover 7 provides a fixed support function.

[0049] To ensure that the axial movement is limited on the outside by circlip 6 installed through the circlip groove.

[0050] Example 2

[0051] This embodiment provides a gear system including multiple shafts located on multiple axes that are different from each other and multiple gears arranged on the multiple shafts respectively. At least one of the multiple gears is an internal gear, wherein the gear at the end of the power transmission is configured with an eccentric gear chamber structure as in Embodiment 1.

[0052] like Figure 3 As shown, a gear train including the eccentric gear chamber structure of Embodiment 1 is illustrated, including two meshing gears 11 and a transmission gear 1 meshing with the gears 11.

[0053] Example 3

[0054] This embodiment provides an engine that uses a gear system as shown in Embodiment 2.

[0055] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. An eccentric gear chamber structure, characterized in that, include: The outer casing of the power unit has a circular chamber; A transmission gear is used to mesh with other gears of the power unit and to output power through a gear shaft. The gear shaft is eccentrically located in the circular cavity, and the transmission gear is detachably connected to the gear shaft. The end cap rotates with the outer shell of the power unit and can be positioned at a set angle. The gear shaft rotates with the end cap and revolves around the central axis of the circular chamber. The end cap is provided with a positioning stop, the positioning stop has a first annular mating surface and a second annular mating surface, the power body shell has a third annular mating surface that mates with the first annular mating surface and a fourth annular mating surface that mates with the second annular mating surface; By changing the transmission ratio of the entire gear transmission system, the change in the center distance of the gear pair is calculated. Based on the change in the center distance, the eccentricity and eccentric position of the gear shaft are determined. The center distance requirement of the gear pair is met by rotating and positioning the end cover. The end cover has several holes arranged at equal intervals around its circumference, and the outer shell of the power unit is provided with positioning holes that mate with different of the holes. The holes are bolted to the positioning holes.

2. The eccentric gear chamber structure as described in claim 1, characterized in that, The input end of the gear shaft is provided with a fastening bolt that engages with its internal thread, and the transmission gear is mounted on the gear shaft by means of the fastening bolt.

3. The eccentric gear chamber structure as described in claim 1, characterized in that, The output end of the gear shaft is provided with an internal spline.

4. The eccentric gear chamber structure as described in claim 1, characterized in that, The positioning stop and the outer shell of the power unit are provided with a sealing structure.

5. The eccentric gear chamber structure as described in claim 4, characterized in that, The sealing structure is an O-ring.

6. The eccentric gear chamber structure as described in claim 1, characterized in that, The gear shaft is engaged with the end cover by a bearing and rotates by the bearing.

7. A gear train, characterized in that, It includes multiple shafts located on multiple axes that are different from each other and multiple gears respectively arranged on the multiple shafts, at least one of the multiple gears being an internal gear, wherein the gear at the end of the power transmission is configured with an eccentric gear chamber structure as described in any one of claims 1-6.

8. An engine, characterized in that, Use the gear system as described in claim 7.

Images