Transmission structure for vacuum pump

Abstract

The utility model discloses a transmission structure for a vacuum pump, which comprises a gear made of a plastic material, and the gear is provided with a first end face and a second end face which are oppositely arranged; the fixed disc is coaxially arranged on the first end face of the gear; the connecting seat is coaxially arranged on the second end surface of the gear and is used for connecting a transmission shaft; wherein the second end face is provided with a connecting groove, the connecting groove is provided with a plurality of corners, and the connecting base is arranged in the connecting groove in an embedded mode. Through the adaptive polygonal structure of the connecting groove and the connecting seat, the stability and tightness of connection between the connecting groove and the connecting seat can be improved, and meanwhile, the service life of the connecting seat is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum pump technology, and specifically relates to a transmission structure for a vacuum pump. Background Technology

[0002] A vacuum pump is a device or equipment that uses mechanical, physical, chemical, or physicochemical methods to evacuate a container to obtain a vacuum. For example, the Roots vacuum pump with a composite rotor structure disclosed in patent number CN114458599A includes: a pump body having a housing, a front end cover and a rear end plate located at both ends of the housing, and a gearbox mounted on the front end cover; a rotor assembly having a driven rotor and a driving rotor, with the Roots blades of the driving rotor and the driven rotor located in the housing, and the two end shafts of the driving rotor and the two end shafts of the driven rotor respectively mounted on the front end cover and the rear end plate; a gear set located in the gearbox and mounted on the shafts of the driving rotor and the driven rotor, linking the driving rotor and the driven rotor to rotate synchronously; and a motor, the motor being mounted on the gearbox.

[0003] This type of vacuum pump structure uses a gear set for transmission. Currently, the gears use a traditional cast iron gear structure, which has a limited service life and is not stable enough. It is prone to loosening during transmission, which is a drawback. Utility Model Content

[0004] This invention aims to overcome the shortcomings of existing technologies by providing a transmission structure for vacuum pumps that offers stable connection and long service life.

[0005] The present invention solves the technical problem by adopting the following technical solution: a transmission structure for a vacuum pump, comprising:

[0006] A gear made of plastic, the gear having a first end face and a second end face disposed opposite to each other;

[0007] A fixed disc coaxially mounted on the first end face of the gear;

[0008] A connecting seat coaxially disposed on the second end face of the gear, the connecting seat being used to connect to the drive shaft;

[0009] The second end face is provided with a connecting groove, the connecting groove has multiple corners, and the connecting seat is embedded in the connecting groove.

[0010] In several embodiments, the connector includes a base plate, with a first connecting ring and a second connecting ring disposed on opposite sides of the base plate. The connector has a shaft hole that penetrates the base plate, the first connecting ring, and the second connecting ring. The shape of the base plate matches the connecting groove and can be embedded in the connecting groove.

[0011] In several embodiments, the first connecting ring passes through the gear and into the fixed disk.

[0012] In several embodiments, the second connecting ring protrudes to the outside of the second end face.

[0013] In several embodiments, the substrate and the connecting groove are polygonal in shape.

[0014] In several embodiments, the gear, the fixed disk, and the base plate are all provided with multiple threaded holes, which are used for bolts to pass through and connect and fix the gear, the fixed disk, and the base plate.

[0015] In several embodiments, a positioning block is provided protruding on the side wall of the connecting groove, and an inwardly recessed positioning groove is provided on the outer wall of the substrate, wherein the positioning block and the positioning groove are inserted into each other.

[0016] In several embodiments, a second positioning block is provided protruding from the bottom surface of the connecting groove, and a first positioning hole is provided on the substrate, with the second positioning block and the first positioning hole being inserted into each other.

[0017] This utility model has the following beneficial effects:

[0018] This invention improves the stability and tightness of the connection between the connecting groove and the connecting seat through a polygonal structure that allows for compatibility, while also extending their service life.

[0019] This invention improves wear resistance and high-temperature resistance through a gear structure made of plastic.

[0020] This invention avoids assembly misalignment caused by machining errors by using the matching of positioning holes and slots. Attached Figure Description

[0021] The accompanying drawings described herein are for illustrative purposes only and do not represent all possible implementations, nor should they be considered as limiting the scope of this invention.

[0022] Figure 1 The overall structure of the transmission structure for the vacuum pump in Embodiment 1 is schematically shown;

[0023] Figure 2 schematically shown Figure 1 Side view structure;

[0024] Figure 3 schematically shown Figure 1 The explosive structure;

[0025] Figure 4 The front view of the gear in Embodiment 2 is schematically shown;

[0026] Figure 5 The front view of the connector in Embodiment 2 is schematically shown;

[0027] Figure 6 The front view of the gear in Embodiment 3 is schematically shown;

[0028] Figure 7 The front view of the connector in Embodiment 3 is shown schematically. Detailed Implementation

[0029] The embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present utility model, but not all embodiments.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in conjunction with the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] Example 1

[0032] like Figures 1-3 As shown, the transmission structure for the vacuum pump provided in this embodiment mainly includes a gear 10 made of plastic. The gear 10 has a first end face 101 and a second end face 102 that are arranged opposite to each other, as well as a fixed plate 20 coaxially arranged on the first end face 101 of the gear 10 and a connecting seat 30 coaxially arranged on the second end face 102 of the gear 10. The connecting seat 30 is used to connect to the transmission shaft and is configured in the gearbox of the vacuum pump for use.

[0033] Among them, gear 10 can be made of PEEK material, which can effectively reduce the high temperature heat generated during the high-speed operation of the gear, and also allow the pump body temperature to be well controlled, reducing the pump noise, making it suitable for the high-requirement food industry.

[0034] Additionally, a connecting groove 11 is provided on the second end face 102. The connecting groove 11 has multiple corners, and the connecting seat 30 is embedded in the connecting groove 11. That is, the connecting groove 11 can be a polygonal shape such as a regular hexagon.

[0035] Specifically, the connector 30 includes a base plate 31. A first connecting ring 32 and a second connecting ring 33 are provided on each of the opposite sides of the base plate 31. The connector 30 has a shaft hole that passes through the base plate 31, the first connecting ring 32, and the second connecting ring 33. The shape of the base plate 31 matches the connecting groove 11 and can be embedded in the connecting groove 11. That is, the base plate 31 is also a regular hexagon. The polygonal structure can improve the tightness and stability of the connection and prevent loosening and slippage.

[0036] The first connecting ring 32 passes through the gear 10 and enters the fixed disk 20, while the second connecting ring 33 protrudes to the outside of the second end face 102.

[0037] Furthermore, the gear 10, the fixed disk 20, and the base plate 31 are all provided with multiple threaded holes, which are used for the bolt 41 to pass through and connect and fix the gear 10, the fixed disk 20, and the base plate 31.

[0038] Example 2

[0039] In this embodiment, the difference from Embodiment 1 is that a protruding positioning block 111 is added to the side wall of the connecting groove 11, and an inwardly recessed positioning groove 311 is also added to the outer wall of the base plate 31. The positioning block 111 and the positioning groove 311 are inserted and matched. The positioning block 111 and the positioning groove 311 are matched in shape and can adopt a semi-cylindrical structure. Two of each are provided to provide a positioning effect and ensure that the positions of multiple threaded holes correspond to each other, so as to facilitate the insertion of bolts 41.

[0040] Example 3

[0041] In this embodiment, the difference from embodiment 2 is that a second positioning block 112 is provided protruding on the bottom surface of the connecting groove 11. Correspondingly, a first positioning hole 312 is provided on the substrate 31. The second positioning block 112 and the first positioning hole 312 are inserted and engaged. The second positioning block 112 and the first positioning hole 312 can adopt a cylindrical structure, which also provides the positioning effect.

[0042] The scope of this utility model is not limited by the embodiments described above, but by the appended claims and their equivalents.

[0043] The terminology used herein is intended to explain the embodiments and is not intended to limit and / or restrict the present invention. It should be understood that the terms "front," "rear," "left," "right," "head," "tail," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing the present invention and for simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

Claims

1. A transmission structure for a vacuum pump, characterized in that, include: A gear (10) made of plastic, the gear (10) having a first end face (101) and a second end face (102) disposed opposite to each other; A fixed disk (20) is coaxially mounted on the first end face (101) of the gear (10); A connecting seat (30) is coaxially disposed on the second end face (102) of the gear (10), the connecting seat (30) being used to connect to the drive shaft; The second end face (102) is provided with a connecting groove (11), the connecting groove (11) has multiple corners, and the connecting seat (30) is embedded in the connecting groove (11).

2. The transmission structure for a vacuum pump according to claim 1, characterized in that, The connecting seat (30) includes a base plate (31), and a first connecting ring (32) and a second connecting ring (33) are provided on each of the opposite sides of the base plate (31). A shaft hole is provided in the connecting seat (30), and the shaft hole passes through the base plate (31), the first connecting ring (32) and the second connecting ring (33). The shape of the base plate (31) matches the connecting groove (11) and can be embedded in the connecting groove (11).

3. The transmission structure for a vacuum pump according to claim 2, characterized in that, The first connecting ring (32) passes through the gear (10) and enters the fixed disk (20).

4. The transmission structure for a vacuum pump according to claim 3, characterized in that, The second connecting ring (33) protrudes to the outside of the second end face (102).

5. The transmission structure for a vacuum pump according to claim 2, characterized in that, The substrate (31) and the connecting groove (11) are polygonal in shape.

6. The transmission structure for a vacuum pump according to claim 2, characterized in that, The gear (10), the fixed disk (20) and the base plate (31) are all provided with multiple threaded holes, which are used for bolts (41) to pass through and connect and fix the gear (10), the fixed disk (20) and the base plate (31).

7. The transmission structure for a vacuum pump according to claim 2, characterized in that, A positioning block (111) is provided on the side wall of the connecting groove (11), and a positioning groove (311) is provided on the outer wall of the substrate (31). The positioning block (111) and the positioning groove (311) are inserted into each other.

8. The transmission structure for a vacuum pump according to claim 2, characterized in that, A second positioning block (112) is provided on the bottom surface of the connecting groove (11), and a first positioning hole (312) is provided on the base plate (31). The second positioning block (112) is inserted into the first positioning hole (312).

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