Vacuum pump structure

Abstract

The utility model relates to the technical field of generators, in particular to a vacuum pump structure, a connecting part is convexly arranged on a pump shell in the direction towards a rear end cover of a motor, the connecting part is inwards recessed and is sequentially provided with a first cavity and a second cavity, an oil seal is arranged in the first cavity, and a rear bearing is arranged in the second cavity; the outer side of the connecting part is connected with the motor rear end cover through a connecting sleeve piece, the connecting sleeve piece comprises a connecting base and a supporting top plate, the supporting top plate is connected to the top of the connecting base, the connecting base is provided with an upward-concave central through hole and an annular connecting groove formed in the outer portion of the central through hole, and the annular connecting groove is connected with the motor rear end cover in a sleeving mode; the supporting top plate is provided with a first hole, the pump shell is provided with a second hole corresponding to the first hole, and the first hole and the second hole are connected through a bolt. The connecting base is provided with a third hole, and the third hole is connected with the rear end cover of the motor through a bolt. The motor rear end cover can be directly adapted to be used on the existing motor rear end cover, and has better adaptability.

Description

Technical Field

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

[0002] Generators are divided into generators with pumps and generators without pumps. In generators with pumps, the vacuum pump is one of the main components. The main function of the vacuum pump is to drive the pump core and blades to rotate through the rotating rotor when the generator is running. The inner cavity of the vacuum pump is an eccentric circle (relative to the center of rotation of the pump core). This allows the vacuum pump to draw air from the connected vacuum port and create negative pressure during operation. When certain vehicle functions (such as brake booster) require negative pressure assistance from the vacuum in the air tank, this can be achieved through appropriate control.

[0003] A vacuum pump generally consists of a pump body (pump casing), pump core, impeller, cover plate, and pipe fittings (including oil inlet, outlet, and suction pipes). Because the pump chamber is filled with oil during operation, an oil seal is typically added to prevent leakage. The oil seal is usually located inside the generator's rear cover. As a rubber component, the oil seal will inevitably age and fail over time. Replacing the oil seal requires disassembling the entire generator, which is complex and costly.

[0004] Furthermore, the pump core rotates during operation, typically driven by the generator rotor shaft, which is generally supported by front and rear bearings. The rear bearing is generally smaller and has a weaker load capacity. Over prolonged operation, the grease inside the bearing will be consumed, gradually aging and failing, resulting in higher replacement and maintenance costs.

[0005] Our company has applied for a related patent, application number CN202422954657.3, which discloses a generator with a vacuum pump and bearing structure, including a generator body and a vacuum pump. The pump housing has a protruding stop protruding towards the rear end cover, and a recessed stop is provided at the connection between the rear end cover and the protruding stop. The protruding stop and the recessed stop are connected by a positioning structure. A first cavity and a second cavity are sequentially provided at the connection between the protruding stop and the recessed stop. An oil seal is connected in the first cavity, and a rear bearing is connected in the second cavity. The rotor shaft passes through the recessed stop and the protruding stop in sequence and is then fixed in the pump housing by the oil seal and the rear bearing in sequence. This utility model, by transferring the oil seal and the rear bearing to the vacuum pump, continuously uses the oil in the pump body to lubricate and cool the rear bearing when the vacuum pump is working, thereby improving the service life of the generator bearing and the overall service life of the generator.

[0006] However, the above technology requires modifications to the existing motor rear end cover, making it incompatible with current motor rear end covers. Therefore, we aim to design a vacuum pump that incorporates a rear bearing and oil seal, while also being compatible with existing motor rear end covers. Utility Model Content

[0007] To address the shortcomings of the existing technology, the purpose of this utility model is to provide a vacuum pump structure that can be directly adapted to the existing motor rear end cover, thus achieving better compatibility.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A vacuum pump structure includes a pump casing, a pump core, blades, a cover plate, and a pipe joint;

[0010] The pump housing has a connecting part that protrudes towards the rear end cover of the motor. The connecting part is recessed inward and has a first cavity and a second cavity in sequence. The first cavity is equipped with an oil seal and the second cavity is equipped with a rear bearing.

[0011] The outer side of the connecting part is connected to the rear end cover of the motor via a connecting kit. The connecting kit includes a connecting base and a supporting top plate. The supporting top plate is connected to the top of the connecting base. The connecting base has an upwardly recessed central through hole and an annular connecting groove provided outside the central through hole. The annular connecting groove is sleeved with the rear end cover of the motor.

[0012] The supporting top plate is provided with a first hole, and the pump housing is provided with a second hole corresponding to the first hole. The first hole and the second hole are connected by bolts.

[0013] The connecting base is provided with a third hole, which is connected to the rear end cover of the motor by bolts.

[0014] As a preferred embodiment of the present invention, the supporting top plate includes a top plate and a heat dissipation part. The heat dissipation part is a hollow connecting sleeve. The heat dissipation part includes a central hole, a liquid cooling cavity, a liquid inlet hole, and a liquid outlet hole. The liquid cooling cavity is located outside the central hole. The liquid inlet hole and the liquid outlet hole are respectively connected to the liquid cooling cavity. The liquid inlet hole is connected to the liquid outlet pipe of the water cooling equipment, and the liquid outlet hole is connected to the liquid inlet pipe of the water cooling equipment.

[0015] As a preferred embodiment of the present invention, the connecting part includes a stepped connecting recess, and the heat dissipation part is provided with a matching recess corresponding to the stepped connecting recess.

[0016] As a preferred embodiment of the present invention, the lower end of the heat dissipation part is provided with a connecting hook ring protruding downwards, and the top of the connecting base is provided with a hooking member protruding towards the connecting hook ring, and the connecting hook ring and the hooking member are engaged with each other.

[0017] As a preferred embodiment of the present invention, the height of the highest point of the hook member is not higher than the height of the lowest point of the connecting part.

[0018] As a preferred embodiment of the present invention, a shock-absorbing sealing ring is further provided at the connection between the connecting part and the supporting top plate, and the shock-absorbing sealing ring is made of rubber.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] By designing a connection kit, the vacuum pump with rear bearing and oil seal can be well adapted to existing motors without special modifications to the structure of the motor's rear end cover. This improves compatibility and facilitates later disassembly and maintenance.

[0021] By optimizing the support top plate, the connecting kit is equipped with a heat dissipation section, which can be connected to an external water cooling device to dissipate heat from the vacuum pump, protect the vacuum pump, and extend its service life. Attached Figure Description

[0022] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0024] Figure 2 This is a bottom view of the present invention.

[0025] Figure 3 This utility model Figure 2 Cross-sectional view at point AA;

[0026] Figure 4 This is a cross-sectional view of the vacuum pump in this utility model, excluding the rear bearing and oil seal;

[0027] Figure 5 This is a cross-sectional view of the connecting kit in this utility model. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0029] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0030] See attached document Figure 1 To be continued Figure 5 As shown, a vacuum pump structure includes a pump housing 1, a pump core, blades, a cover plate, and a pipe joint.

[0031] The pump housing 1 protrudes towards the rear end cover of the motor and is provided with a connecting part 2. It should be noted that the rear end cover of the motor is not shown in the attached drawings of this application. The rear end cover of the motor here is a general specification rear end cover. The connecting part 2 is recessed inward and is provided with a first cavity 3 and a second cavity 4 in sequence. The first cavity 3 is provided with an oil seal 5, and the second cavity 4 is provided with a rear bearing 6.

[0032] The outer side of the connecting part 2 is connected to the rear end cover of the motor via the connecting kit 7. The connecting kit 7 includes a connecting base 8 and a supporting top plate 9. The supporting top plate 9 is connected to the top of the connecting base 8. The connecting base 8 has an upwardly recessed central through hole 10 and an annular connecting groove 11 provided outside the central through hole 10. The annular connecting groove 11 is sleeved with the rear end cover of the motor.

[0033] The top support plate 9 is provided with a first hole 901, and the pump housing 1 is provided with a second hole 101 corresponding to the first hole 901. The first hole 901 and the second hole 101 are connected by bolts.

[0034] The connecting base 8 is provided with a third hole 801, which is connected to the motor rear end cover by bolts. There are multiple third holes 801 to accommodate motor rear end covers of various specifications. The connection hole positions on different motor rear end covers are different. Multiple third holes 801 are provided so that the required third hole 801 can be selected to connect to the motor rear end cover according to the actual situation.

[0035] The supporting top plate 9 includes a top plate 12 and a heat dissipation part 13. The heat dissipation part 13 is a hollow connecting sleeve, including a central hole 1301, a liquid cooling cavity 1302, a liquid inlet hole 1303, and a liquid outlet hole 1304. The liquid cooling cavity 1302 is located outside the central hole 1301. The liquid inlet hole 1303 and the liquid outlet hole 1304 are respectively connected to the liquid cooling cavity 1302. The liquid inlet hole 1303 is connected to the liquid outlet pipe of the water cooling equipment, and the liquid outlet hole 1304 is connected to the liquid inlet pipe of the water cooling equipment. It should be noted that the external water cooling equipment is not shown in the accompanying drawings of this application. The water cooling equipment is an existing liquid cooling equipment, which can be adapted by those skilled in the art according to the specific motor specifications.

[0036] The connecting part 2 includes a stepped connecting recess 201, and the heat dissipation part 13 is provided with a matching recess 1305 corresponding to the stepped connecting recess 201. The interlocking connection between the stepped connecting recess 201 and the matching recess 1305 achieves a centered fit.

[0037] The lower end of the heat dissipation part 13 has a downward protruding connecting hook 14, and the top of the connecting base 8 has a hook 15 protruding towards the connecting hook 14. The connecting hook 14 and the hook 15 are engaged with each other.

[0038] The height of the highest point of the hook 15 is not higher than the height of the lowest point of the connecting part 2. By setting the highest point of the hook 15 to be no higher than the lowest point of the connecting part 2, it is ensured that after the connecting part 2 is inserted into the connecting kit 7, the lowest point is below the connection between the connecting base 8 and the supporting top plate 9. Since the connecting base 8 and the supporting top plate 9 are interconnected and have mutual forces, the stability at the connection point is the strongest. When the connecting part 2, which has an internal oil seal 5 and a rear bearing 6, is inserted, the most stable state can be achieved.

[0039] A shock-absorbing sealing ring is also provided at the connection between the connecting part 2 and the supporting top plate 9. The shock-absorbing sealing ring is made of rubber.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A vacuum pump structure, characterized by, It includes pump shell (1), pump core, blade, cover plate, pipe joint; The connecting part (2) is provided with a first cavity (3) and a second cavity (4) in sequence by being recessed inward, the oil seal (5) is arranged in the first cavity (3), and the rear bearing (6) is arranged in the second cavity (4). The connecting part (2) is connected with the motor rear end cover through the connecting sleeve (7), the connecting sleeve (7) comprises a connecting base (8) and a supporting top plate (9), the supporting top plate (9) is connected to the top of the connecting base (8), the connecting base (8) is provided with a central through hole (10) recessed upward and an annular connecting groove (11) arranged outside the central through hole (10), and the annular connecting groove (11) is sleeved with the motor rear end cover; The supporting top plate (9) is provided with a first hole (901), the pump shell (1) is provided with a second hole (101) corresponding to the first hole (901), and the first hole (901) and the second hole (101) are connected through bolts. The connecting base (8) is provided with a third hole (801), and the third hole (801) is connected with the motor rear end cover through bolts.

2. A vacuum pump according to claim 1, characterized in that The supporting top plate (9) comprises a top plate (12) and a heat dissipation part (13), the heat dissipation part (13) is a hollow connecting sleeve, the heat dissipation part (13) comprises a central hole (1301), a liquid cooling cavity (1302), an inlet hole (1303) and an outlet hole (1304), the liquid cooling cavity (1302) is arranged outside the central hole (1301), the inlet hole (1303) and the outlet hole (1304) are in communication with the liquid cooling cavity (1302), the inlet hole (1303) is connected with the outlet pipe of the water cooling equipment, and the outlet hole (1304) is connected with the inlet pipe of the water cooling equipment.

3. A vacuum pump arrangement according to claim 2, characterized in that The connecting part (2) comprises a stepped connecting recess (201), and the heat dissipation part (13) is provided with an adaptive recess (1305) corresponding to the stepped connecting recess (201).

4. A vacuum pump according to claim 3, wherein The heat dissipation part (13) is provided with a connecting hook ring (14) protruding downward at the lower end, the connecting base (8) is provided with a hooking piece (15) protruding toward the connecting hook ring (14) at the top, and the connecting hook ring (14) and the hooking piece (15) are engaged with each other.

5. A vacuum pump according to claim 4, wherein The height of the highest part of the hooking piece (15) is not higher than the height of the lowest part of the connecting part (2).

6. A vacuum pump according to claim 1, characterized in that The connecting part (2) and the supporting top plate (9) are further provided with a shock-absorbing sealing ring, and the shock-absorbing sealing ring is a shock-absorbing sealing ring made of rubber.

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