Gear press fitting tool

Abstract

The utility model discloses a gear press-fitting tool which is used for assembling a gear on a transmission shaft and comprises a shaft base, a gear base and a guide column. A transmission shaft accommodating cavity is formed in the shaft base, the transmission shaft accommodating cavity is used for placing the transmission shaft, at least two groups of guide columns are arranged on the shaft base, one end of each guide column is arranged on the shaft base, and the other end of each guide column is connected with the gear base; the gear base is used for placing a gear to be assembled; and a spring is arranged between the gear base and the shaft base. The gear can be rapidly installed on the transmission shaft, the press-fitting speed is high, meanwhile, the size is reduced, and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of gear fuel pumps, and particularly relates to a gear pressing tooling. Background Art

[0002] The gear fuel pump uses the mutual rotation of two gears to suck fuel from the inlet and discharge it from the outlet after compression. It has the advantages of simple structure, reliable operation and convenient maintenance, and is widely used in large trucks, buses and industrial oil pumps.

[0003] In the existing press-fitting of shafts and gears using interference fit, a tooling base is mostly used for support and guidance, but it is not applicable to the driving gear and the transmission shaft of the gear pump, and is not suitable for fast-paced automatic press-fitting. It often has a large volume, inaccurate positioning and is not easy to operate. Content of the Utility Model

[0004] To solve the above problems, the utility model provides a gear pressing tooling, which can quickly install the gear and the transmission shaft, has a fast press-fitting speed, reduces the volume at the same time and is easy to operate.

[0005] To achieve the above object, the technical solution adopted by the utility model is: a gear pressing tooling for assembling a gear onto a transmission shaft, the gear pressing tooling includes a shaft base, a gear base and guide columns; a transmission shaft receiving cavity is arranged on the shaft base, the transmission shaft receiving cavity is used for placing the transmission shaft, at least two groups of the guide columns are arranged on the shaft base, one end of the guide column is arranged on the shaft base, and the other end is connected with the gear base; the gear base is used for placing the gear to be assembled; a spring is arranged between the gear base and the shaft base.

[0006] As a preferred technical solution of the utility model: there are two groups of the guide columns.

[0007] As a preferred technical solution of the utility model: a first mounting hole is arranged on the gear base, a second mounting hole is arranged on the shaft base, one end of the guide column is movably arranged on the first mounting hole, and the other end is slidably connected in the second mounting hole.

[0008] As a preferred technical solution of the utility model: there are two groups of the springs, and two ends of the spring are respectively arranged in the first mounting hole and the second mounting hole.

[0009] As a preferred technical solution of the utility model: a positioning groove is arranged on the gear base, and the positioning groove is used for positioning the gear to be assembled.

[0010] As a preferred technical solution of the utility model: the positioning groove is a conical surface with a large end opening.

[0011] As a preferred technical solution of the present utility model: a plurality of bolt mounting holes are provided on the shaft base.

[0012] The present utility model has the following beneficial effects:

[0013] 1. The gear can be quickly mounted on the transmission shaft, with a fast press-fitting speed, while reducing the volume and facilitating operation.

[0014] 2. The setting of the positioning groove ensures automatic centering during press-fitting. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is Figure 1 the front view of

[0017] Figure 3 is Figure 2 the sectional view taken along the B-B direction of

[0018] Figure 4 is Figure 1 the top view of

[0019] Figure 5 is Figure 4 the sectional view taken along the C-C direction of

[0020] Figures 1-5 In DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the purpose and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0022] As Figures 1-5 shown, the embodiment of the present utility model provides a gear press-fitting tooling for assembling the gear 8 onto the transmission shaft 4. During use, the gear press-fitting tooling is placed on a press in the prior art and under the press head 1 of the press.

[0023] The gear press-fitting tooling includes a shaft base 2, a gear base 6 and guide columns 5. A transmission shaft receiving cavity 3 is provided on the shaft base 2, and the transmission shaft receiving cavity 3 is used for placing a transmission shaft 4; at least two groups of guide columns 5 are provided on the shaft base 2. In this embodiment, preferably two groups of guide columns 5 are provided. One end of the guide column 5 is provided on the shaft base 2, and the other end is connected to a gear base 6; the gear base 6 is used for placing a gear 8 to be assembled; a spring 7 is provided between the gear base 6 and the shaft base 2. On the one hand, the spring 7 prevents the gear base 6 from sliding down along the guide column 5 onto the shaft base 2; on the other hand, it can rebound after press-fitting, facilitating the removal of the press-fitted transmission shaft and gear assembly. The press head 1 of the press is used to press down the gear 8 to be assembled, and the gear 8 to be assembled is press-fitted onto the transmission shaft 4. After the pressing action of the press head 1 ends, the transmission shaft and gear assembly are lifted under the spring force of the spring 7 and can be directly removed. The press-fitting speed is fast, and at the same time, the volume is reduced, which is convenient for operation.

[0024] A first mounting hole 9 is provided on the gear base 6, a second mounting hole 10 is provided on the shaft base 2, one end of the guide column 5 is movably provided on the first mounting hole 9, and the other end is slidably connected in the second mounting hole 10. In this embodiment, preferably, the shapes of the first mounting hole 9 and the second mounting hole 10 are stepped holes. A baffle 15 is provided at the base of the guide column 5. The diameter of the upper part of the first mounting hole 9 is smaller than that of the lower part, and the diameter of the upper part of the second mounting hole 10 is smaller than that of the lower part. The top of the guide column 5 extends into the lower part of the first mounting hole 9, and a fixing bolt 11 is used for installation in the upper part of the first mounting hole 9, and the fixing bolt 11 connects the guide column 5 and the gear base 6 together. The bottom of the guide column 5 extends into the lower part of the second mounting hole 10, and the baffle 15 prevents the bottom of the guide column 5 from entering the upper part of the second mounting hole 10. The combined cooperation of the baffle 15 and the fixing bolt 11 ensures that the relative positions of the gear 8 to be assembled and the shaft to be assembled do not change with the change of the spring force of the spring 7. The length of the lower part of the second mounting hole 10 is matched with the depth of the gear 8 to be assembled pressed onto the transmission shaft 4 to be assembled, so that the assembled gear will not be over-assembled or not assembled in place.

[0025] To facilitate the installation of the spring 7, the number of springs 7 is the same as the number of guide columns 5, that is, preferably two groups of springs 7 are provided. The two ends of each group of springs 7 are respectively provided in the first mounting hole 9 and the second mounting hole 10, and the spring 7 is sleeved outside the guide column 5. The diameter of the upper part of the second mounting hole 10 is the same as the diameter of the lower part of the first mounting hole 9, and the two ends of the spring 7 are respectively provided in the lower part of the first mounting hole 9 and the upper part of the second mounting hole 10.

[0026] A positioning groove 12 is provided on the gear base 6, and the positioning groove 12 is used to position the gear 8 to be assembled. The positioning groove 12 is a conical surface with a large end opening, and a chamfer can also be provided on the conical surface. The shape inside the positioning groove 12 is conical and has a chamfer, ensuring that the gear 8 to be assembled can be quickly positioned. To prevent jamming of the drive shaft and the gear assembly or non-return of the spring 7 after press-fitting, a maintenance groove 13 is provided on the shaft base 2. The drive shaft receiving cavity 3 is located above the maintenance groove 13 and is hollow. The drive shaft 4 to be assembled extends into the maintenance groove 13 through the drive shaft receiving cavity 3. When jamming or non-return of the spring 7 occurs, the drive shaft can be taken out from bottom to top through the maintenance groove 13. A plurality of bolt mounting holes 14 are provided on the shaft base 2, and the plurality of bolt mounting holes 14 facilitate the connection of the shaft base 2 with other devices, such as for mounting nameplates, etc. The preferred external dimensions of this embodiment are 90*40*90 mm, with a small volume and easy replacement and maintenance.

[0027] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0028] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A gear press fitting, used for assembling a gear (8) onto a transmission shaft (4), characterized in that: The gear press-fitting tool comprises a shaft base (2), a gear base (6) and a guide column (5); a transmission shaft accommodating cavity (3) is provided on the shaft base (2), and the transmission shaft accommodating cavity (3) is used to place the transmission shaft (4); at least two groups of guide columns (5) are provided on the shaft base (2), one end of the guide column (5) is provided on the shaft base (2), and the other end is connected to the gear base (6); the gear base (6) is used to place the gear (8) to be assembled; a spring (7) is provided between the gear base (6) and the shaft base (2).

2. The gear press fitting according to claim 1, characterized in that: The guide posts (5) are provided in two groups.

3. The gear press-fitting tool according to claim 1, characterized in that: The gear base (6) is provided with a first mounting hole (9), the shaft base (2) is provided with a second mounting hole (10), one end of the guide column (5) is movably provided on the first mounting hole (9), and the other end thereof is slidably connected in the second mounting hole (10).

4. The gear press-fitting tool according to claim 3, characterized in that: There are two groups of springs (7), and two ends of each group of springs (7) are respectively arranged in the first mounting hole (9) and the second mounting hole (10).

5. The gear press-fitting tool according to claim 1, characterized in that: The gear base (6) is provided with a positioning groove (12), and the positioning groove (12) is used to position the gear (8) to be assembled.

6. The gear press-fitting tool according to claim 5, characterized in that: The positioning groove (12) is a conical surface with the opening at the larger end.

7. The gear press fitting according to any one of claims 1 to 6, characterized in that: The shaft base (2) is provided with a plurality of bolt mounting holes (14).

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