Vacuum pump generator with bearing structure

Abstract

The utility model relates to the technical field of generators, in particular to a generator with a vacuum pump with a bearing structure, which comprises a generator body and a vacuum pump, a convex stop piece is arranged on a pump shell in a protruding manner towards the direction of a rear end cover, and a concave stop piece is arranged at the joint of the rear end cover and the convex stop piece. The convex stop piece and the concave stop piece are connected through a positioning structure, a first cavity and a second cavity are sequentially formed in the connecting position of the convex stop piece and the concave stop piece, an oil seal is connected in the first cavity, and a rear bearing is connected in the second cavity. The rotor shaft sequentially penetrates through the concave stopping piece and the convex opening and then is fixed in the pump shell through the oil seal and the rear bearing in sequence. The oil seal is transferred to the vacuum pump, the rear bearing is transferred to the vacuum pump, when the vacuum pump works, oil in the pump body is continuously used for lubricating and cooling the rear bearing, the service life of the bearing of the generator with the pump is prolonged, and the overall service life of the generator is prolonged.

Description

Technical Field

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

[0002] Gasoline engines typically use spark-ignition combustion, controlling the intake air volume through a throttle valve. This creates a negative pressure (vacuum) in the intake manifold, which can be directly used in systems requiring a vacuum, such as brake boosters. Diesel engines, however, use compression-ignition combustion. They lack a throttle valve, and their intake process relies on turbocharging or natural aspiration. Therefore, they cannot create sufficient negative pressure in the intake manifold like gasoline engines.

[0003] Because diesel engines cannot directly obtain a vacuum from the intake system, they require additional equipment to provide the necessary vacuum source for systems such as brake boosters. A pump-driven generator integrates a vacuum pump connected to the generator's rotor shaft, allowing them to rotate synchronously and thus providing a vacuum source for the vacuum cylinders in the vehicle's braking system. This design enables diesel vehicles to ensure the proper functioning of the braking system and other vacuum-requiring systems, even in the absence of conventional intake manifold negative pressure.

[0004] Patent application CN201110189943.X discloses an oil return structure for a generator with a vacuum pump, which promptly returns lubricating oil that has entered the generator's sealing cavity to the oil pan, preventing lubricating oil from leaking from the vacuum pump into the generator and causing damage. The oil return structure of this invention includes a generator and a vacuum pump. The rotor shafts of the generator and the vacuum pump are coaxial or connected via a spline structure. An oil seal is provided at the rotor shaft of the generator, and the vacuum pump has a vacuum pump oil return pipe. A cavity is provided outside the oil seal on the generator rotor shaft, and the bottom of the cavity is connected to an oil return port leading to the outside of the generator housing. The oil return port is connected to a generator oil return pipe. This invention, by providing a cavity and oil return port inside the generator, allows lubricating oil that has entered the generator from the vacuum pump to be discharged promptly, thereby reducing the impact force of the lubricating oil on the oil seal and improving the generator's sealing ability, preventing damage to the generator due to lubricating oil ingress. However, because the pump chamber of a vacuum pump is filled with oil during operation, an oil seal is generally required to prevent oil leakage. The oil seal is typically located inside the generator's rear cover. Being a rubber component, the oil seal will inevitably age and fail over time. Furthermore, the pump core rotates during operation, usually driven by the generator rotor shaft, which is typically supported by front and rear bearings. The rear bearing is generally smaller and has a weaker load capacity. Over extended periods of operation, the grease inside the bearing will be consumed, gradually aging and failing, ultimately causing generator malfunction and rendering the generator unusable. Utility Model Content

[0005] To address the shortcomings of the existing technology, the purpose of this utility model is to provide a generator with a vacuum pump and bearing structure. By transferring the oil seal originally designed to be installed on the rear cover to the vacuum pump, and transferring the rear bearing originally designed to be installed on the rotor shaft to the vacuum pump, the bearing is continuously lubricated by the oil in the pump body when the vacuum pump is working, thereby improving the overall service life of the generator.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A vacuum pump-bearing generator includes a generator body and a vacuum pump. The generator body includes a stator, a rotor, a rotor shaft, a front end cover, and a rear end cover.

[0008] The vacuum pump includes a pump casing, a pump core, blades, a cover plate, and pipe fittings.

[0009] 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 provided sequentially at the connection between the protruding stop and the recessed stop. An oil seal is provided in the first cavity, and a rear bearing is provided in the second cavity. The rotor shaft passes through the recessed stop and the protruding outlet in sequence and is then fixed in the pump housing by the oil seal and the rear bearing in sequence.

[0010] As a preferred embodiment of the present invention, the positioning structure includes a first positioning element and a second positioning element. The first positioning element is disposed on the rear end cover and has a connecting blind hole recessed inward. The recessed stop is fitted with the first positioning element and has a second positioning element. The second positioning element has a connecting through hole corresponding to the connecting blind hole. The connecting blind hole and the connecting through hole are connected by bolts.

[0011] As a preferred embodiment of the present invention, the first positioning member is provided with a positioning notch, the positioning notch includes an abutting arc surface, the second positioning member is provided with a protruding protrusion corresponding to the abutting arc surface, the protrusion is provided with an abutting surface that contacts the abutting arc surface, and the abutting arc surface is connected to the abutting surface.

[0012] As a preferred embodiment of the present invention, one of the first positioning components is provided with an indicator notch, and the pump housing is provided with a mating notch corresponding to the indicator notch. When the generator body and the vacuum pump are assembled, the projection of the indicator notch on the horizontal plane coincides with the projection of the mating notch on the horizontal plane.

[0013] As a preferred embodiment of this utility model, the number of the first positioning members is three, and the first positioning members are arranged in a circular array on the rear end cover with the center of the concave stop member as the center.

[0014] The number of the second positioning members is adapted to the number of the first positioning members, and the second positioning members are arranged in a circular array on the pump casing with the center of the protruding stop member as the center.

[0015] As a preferred embodiment of the present invention, the protruding stop includes a first boss and a second boss that protrude sequentially toward the concave stop, and the concave stop is provided with a first connecting surface and a second connecting surface corresponding to the first boss and the second boss, respectively.

[0016] As a preferred embodiment of this utility model, the first positioning member is connected to the recessed member via a connecting rib.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] By transferring the oil seal originally designed to be installed on the rear end cover to the vacuum pump, and transferring the rear bearing originally designed to be installed on the rotor shaft to the vacuum pump, the oil in the pump body is continuously used 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.

[0019] By designing convex and concave stop parts and connecting them with a positioning structure, the sealing structure of the pump generator can be easily replaced, reducing maintenance difficulty and cost. Attached Figure Description

[0020] 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:

[0021] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0022] Figure 2 This is an exploded view of the structure of this utility model;

[0023] Figure 3 This is a cross-sectional view of the present invention;

[0024] Figure 4 This is a structural diagram of the generator body of this utility model;

[0025] Figure 5 This is a structural diagram of the vacuum pump of this utility model. Detailed Implementation

[0026] 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.

[0027] See attached document Figure 1 As shown in the attached figure, a vacuum pump-bearing structure generator includes a generator body 1 and a vacuum pump 4.

[0028] The generator body 1 includes a stator, a rotor, a rotor shaft 2, a front cover, and a rear cover 3. In this technical solution, compared with the traditional technology, the oil seal chamber and bearing chamber structure on the rear cover 3 are eliminated, reducing the processing difficulty of the rear cover. The rear bearing 11 that needs to be installed on the rotor shaft 3 is also eliminated, reducing the processing difficulty of the generator assembly.

[0029] Vacuum pump 4 includes pump casing 5, pump core, blades, cover plate, and pipe joint.

[0030] The pump casing 5 has a protruding stop 6 protruding towards the rear end cover 3. The rear end cover 3 and the protruding stop 6 are connected by a recessed stop 7. The protruding stop 6 and the recessed stop 7 are connected by a positioning structure. The connection between the protruding stop 6 and the recessed stop 7 is provided with a first cavity 8 and a second cavity 9 in sequence. The first cavity 8 is provided with an oil seal 10, and the second cavity 9 is provided with a rear bearing 11. The rotor shaft 2 passes through the recessed stop 7 and the protruding outlet in sequence and is supported by the oil seal 10 and the rear bearing 11 in sequence, forming a support and fixing it in the pump casing 5.

[0031] Because the rear bearing 11 is located within the oil seal and the second chamber 9, the oil in the pump body will continuously soak the bearing and provide lubrication, thus extending the lifespan of the rear bearing 11. When the rear bearing 11 or the oil seal 10 is nearing or has failed, it is only necessary to remove the vacuum pump 4 and replace the corresponding parts or replace it with a new vacuum pump 4. There is no need to disassemble the entire generator, which greatly reduces maintenance costs and significantly improves maintenance efficiency.

[0032] By transferring the oil seal 10, originally designed to be installed on the rear end cover 3, to the vacuum pump 4, and the rear bearing 11, originally designed to be installed on the rotor shaft 2, to the vacuum pump 4, the oil in the pump body is continuously used to lubricate and cool the rear bearing 11 when the vacuum pump 4 is working, thereby improving the service life of the generator bearing and the overall service life of the generator.

[0033] The positioning structure includes a first positioning element 12 and a second positioning element 13. The first positioning element 12 is located on the rear end cover 3 and has a recessed connecting blind hole 14. The second positioning element 13 is adapted to the first positioning element 12 on the recessed stop 7. The second positioning element 13 has a connecting through hole 15 corresponding to the connecting blind hole 14. The connecting blind hole 14 and the connecting through hole 15 are connected by bolts. The positioning structure enables rapid positioning between the generator body 1 and the vacuum pump 4, followed by bolt connection, improving the maintenance convenience of the generator with pump and facilitating disassembly and repair.

[0034] The first positioning component 12 is provided with a positioning notch 16, which includes a contact arc surface 17. The second positioning component 13 corresponds to the contact arc surface 17 and is provided with a protruding protrusion 18. The protrusion 18 is provided with a contact surface 19 that contacts the contact arc surface 17. The contact arc surface 17 and the contact surface 19 are connected for quick and accurate positioning.

[0035] One of the first positioning components 12 is provided with an indicator notch 20, and the pump housing 5 is provided with a mating notch 21 corresponding to the indicator notch 20. When the generator body 1 and the vacuum pump 4 are assembled, the projection of the indicator notch 20 on the horizontal plane coincides with the projection of the mating notch 21 on the horizontal plane, so as to quickly and accurately position the components.

[0036] There are three first positioning components 12, which are arranged in a circular pattern around the center of the recessed stop 7 on the rear end cover 3. The spatial structure of the first positioning components 12 ensures the stability of the connection between the generator body 1 and the vacuum pump 4.

[0037] The number of the second positioning members 13 is matched with the number of the first positioning members 12. The second positioning members 13 are arranged in a circular array on the pump casing 5 with the center of the protruding stop member 6 as the center.

[0038] The protruding stop 6 includes a first protrusion 22 and a second protrusion 23 that protrude sequentially toward the recessed stop 7. The recessed stop 7 has a first connecting surface 24 and a second connecting surface 25 corresponding to the first protrusion 22 and the second protrusion 23, respectively. The first positioning member 12 is connected to the recessed stop 7 through a connecting rib 26.

[0039] 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-bearing structure generator, comprising a generator body (1) and a vacuum pump (4), wherein the generator body (1) comprises a stator, a rotor, a rotor shaft (2), a front end cover, and a rear end cover (3), characterized in that, The vacuum pump (4) includes a pump casing (5), a pump core, blades, a cover plate, and a pipe joint; The pump housing (5) has a protruding stop (6) protruding towards the rear end cover (3). The rear end cover (3) and the protruding stop (6) are connected by a recessed stop (7). The protruding stop (6) and the recessed stop (7) are connected by a positioning structure. The connection between the protruding stop (6) and the recessed stop (7) is provided with a first cavity (8) and a second cavity (9) in sequence. The first cavity (8) is provided with an oil seal (10). The second cavity (9) is connected to a rear bearing (11). The rotor shaft (2) passes through the recessed stop (7) and the protruding outlet in sequence and is fixed in the pump housing (5) by the oil seal (10) and the rear bearing (11) in sequence.

2. The vacuum pump-bearing generator according to claim 1, characterized in that, The positioning structure includes a first positioning element (12) and a second positioning element (13). The first positioning element (12) is disposed on the rear end cover (3). The first positioning element (12) is recessed inward and has a connecting blind hole (14). The recessed stop (7) is adapted to the first positioning element (12) and has a second positioning element (13). The second positioning element (13) is provided with a connecting through hole (15) corresponding to the connecting blind hole (14). The connecting blind hole (14) and the connecting through hole (15) are connected by bolts.

3. A vacuum pump-bearing generator according to claim 2, characterized in that, The first positioning member (12) is provided with a positioning notch (16), the positioning notch (16) includes an abutting arc surface (17), the second positioning member (13) is provided with a protruding protrusion (18) corresponding to the abutting arc surface (17), the protrusion (18) is provided with an abutting surface (19) that contacts the abutting arc surface (17), and the abutting arc surface (17) is connected to the abutting surface (19).

4. A vacuum pump-bearing generator according to claim 3, characterized in that, One of the first positioning parts (12) is provided with an indicator notch (20), and the pump housing (5) is provided with a mating notch (21) corresponding to the indicator notch (20). When the generator body (1) and the vacuum pump (4) are assembled, the projection of the indicator notch (20) on the horizontal plane coincides with the projection of the mating notch (21) on the horizontal plane.

5. A vacuum pump-bearing generator according to claim 2, characterized in that, The number of the first positioning member (12) is 3. The first positioning member (12) is arranged in a circle around the center of the concave stop member (7) on the rear end cover (3). The number of the second positioning member (13) is adapted to the number of the first positioning member (12). The second positioning member (13) is arranged in a circle around the center of the protruding stop member (6) on the pump housing (5).

6. A vacuum pump-bearing generator according to claim 1, characterized in that, The protruding stop (6) includes a first protrusion (22) and a second protrusion (23) that protrude sequentially toward the concave stop (7). The concave stop (7) is provided with a first connecting surface (24) and a second connecting surface (25) corresponding to the first protrusion (22) and the second protrusion (23).

7. A vacuum pump-bearing generator according to claim 2, characterized in that, The first positioning member (12) is connected to the recessed member (7) via a connecting rib (26).

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