Permanent magnet synchronous driving and hydraulic pressure integrated power system

Abstract

The invention discloses a permanent magnet synchronous drive and hydraulic pressure integrated power system which comprises an integrated shell, two motor cavities are formed in one side of the integrated shell, and permanent magnet synchronous motors are detachably installed in the motor cavities; the positioning groove is formed in the inner side wall of the motor cavity; the permanent magnet synchronous motor is sleeved with the fixing ring, the fixing ring is elastically provided with a plurality of positioning blocks extending out of the surface of the fixing ring, the ends, close to the fixing ring, of the positioning blocks are provided with connecting rods, the other ends of the connecting rods penetrate through the fixing ring and extend to the inner side of the fixing ring, and the ends of the connecting rods are further sequentially provided with connecting plates and elastic sound insulation cotton. According to the invention, the fixed ring and the plurality of positioning blocks are arranged, and a multi-point supporting structure is adopted, so that vibration of the permanent magnet synchronous motor can be dispersed more uniformly, local stress concentration is reduced, and noise is reduced; and elastic sound insulation cotton is arranged, so that the effects of absorbing vibration and reducing noise can be achieved under the effect of assisting installation of the positioning blocks.

Description

Technical Field

[0001] The present invention belongs to the technical field of permanent magnet motors, and in particular relates to a permanent magnet synchronous drive and hydraulic integrated power system. Background Art

[0002] The drive system of new energy engineering machinery vehicles includes the drive motor and control system as the power source. This part is more critical and its performance directly affects the performance and economic performance of the whole vehicle. The drive and hydraulic integrated power system refers to the integrated design of traction motor, working motor and electric drive control system to reduce the loss in energy conversion and improve the efficiency of the whole vehicle.

[0003] The Chinese patent application document with prior art announcement number CN218498915U discloses an integrated housing, an electric drive system and a vehicle, wherein the integrated housing includes a housing body, a reducer housing, a dual motor end cover and a controller end cover, and the housing body is provided with a reducer installation cavity, a controller installation cavity and a dual motor installation cavity, and the housing body is formed in one piece. The integrated housing of the application simplifies the assembly process and reduces costs.

[0004] The above-mentioned prior art directly installs the motor in its cavity. The vibration generated when the motor is running will be directly transmitted to the cavity wall, causing structural sound transmission and increasing the overall noise in the system. Summary of the invention

[0005] The present invention aims at solving the problems in the prior art and proposes the following technical solutions:

[0006] The present invention provides a permanent magnet synchronous drive and hydraulic integrated power system, comprising:

[0007] An integrated housing, wherein two motor cavities are provided on one side of the integrated housing, and a permanent magnet synchronous motor is detachably installed in the motor cavity;

[0008] A positioning groove, wherein the positioning groove is arranged on the inner side wall of the motor cavity;

[0009] A fixing ring, which is sleeved on the outside of the permanent magnet synchronous motor, and a plurality of positioning blocks extending out of the surface of the fixing ring are elastically arranged on the fixing ring, and a connecting rod is arranged at one end of the positioning block close to the fixing ring, and the other end of the connecting rod passes through the fixing ring and extends to the inside of the fixing ring, and a connecting plate and elastic sound insulation cotton are sequentially arranged on this end of the connecting rod, and the elastic sound insulation cotton is adhered to the surface of the permanent magnet synchronous motor, and a spring is also sleeved on a section of the connecting rod outside and located between the connecting plate and the inner wall of the fixing ring.

[0010] As a preferred embodiment of the above technical solution, a front cover for closing the open end of the motor cavity is provided on the integrated shell, the output shaft of the permanent magnet synchronous motor passes through the front cover and extends to the outside, a positioning cylinder is provided inside the motor cavity and at one end away from the front cover, and the end of the permanent magnet synchronous motor away from the output shaft is inserted in the positioning cylinder.

[0011] As a preferred embodiment of the above technical solution, a step surface is provided at the opening end of the motor cavity, a sound insulation pad 1 is provided on the step surface, and a sound insulation pad 2 is provided at the junction of the edge of the front cover and the step surface.

[0012] As a preferred embodiment of the above technical solution, a fixing frame is symmetrically arranged on the inner side of the fixing ring, and a sound insulation pad four is arranged at one end of the fixing frame close to the permanent magnet synchronous motor, and the sound insulation pad four fits and contacts the outer wall of the permanent magnet synchronous motor.

[0013] As a preferred embodiment of the above technical solution, the outside of the positioning block is covered with a sound insulation pad three.

[0014] As a preferred embodiment of the above technical solution, a plurality of through holes are spaced apart on the connecting plate.

[0015] The beneficial effects of the present invention are:

[0016] (1) The present invention adopts a multi-point support structure by setting a fixing ring and multiple positioning blocks, which can more evenly disperse the vibration of the permanent magnet synchronous motor, reduce local stress concentration, and reduce noise; and the elastic sound insulation cotton can not only play a role in assisting the installation of the positioning blocks, but also play a role in absorbing vibration and reducing noise.

[0017] (2) The present invention can buffer the vibration generated by the output shaft of the permanent magnet synchronous motor by providing sound insulation pad 1 and sound insulation pad 2, thereby reducing working noise; and the stability of the front cover installation can be increased by the cooperative extrusion between rubber and rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 What is shown is a front schematic diagram of the integrated housing in the embodiment;

[0019] Figure 2 What is shown is a schematic diagram of the reverse side of the integrated housing in the embodiment;

[0020] Figure 3 What is shown is a top schematic diagram of the integrated housing in the embodiment (top view);

[0021] Figure 4 What is shown is a schematic diagram of the main structure of the permanent magnet synchronous motor installation in the embodiment;

[0022] Figure 5 What is shown is a side view structural diagram of the permanent magnet synchronous motor installation in the embodiment;

[0023] Figure 6 It is shown that Figure 5 A schematic diagram of the structure enlargement in the middle;

[0024] Figure 7 Shown is a schematic diagram of a connecting plate in an embodiment;

[0025] Figure 8 Shown is a schematic diagram of a fixing frame and a second sound insulation cotton in an embodiment;

[0026] Fig. 9 It is shown that Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0027] Fig.10 is a schematic structural diagram of the positioning block 43;

[0028] Figure numerals: 10. integrated housing; 11. motor cavity; 12. reducer module; 13. control module; 20. permanent magnet synchronous motor; 31. positioning cylinder; 32. front cover; 33. step surface; 34. sound insulation pad one; 35. sound insulation pad two; 41. fixing ring; 42. positioning groove; 43. positioning block; 431. sound insulation pad three; 44. connecting rod; 45. connecting plate; 451. through hole; 46. spring; 47. elastic sound insulation cotton; 48. fixing bracket; 49. sound insulation pad four. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0030] Example

[0031] like Figure 1 , Figure 2 , Figure 3 As shown, Figure 1 What is shown is a front schematic diagram of the integrated housing in the embodiment; Figure 2 What is shown is a schematic diagram of the reverse side of the integrated housing in the embodiment; Figure 3 What is shown is a top schematic diagram of the integrated housing in the embodiment (top view);

[0032] The device includes:

[0033] An integrated housing 10, wherein two motor cavities 11 are disposed on one side of the integrated housing 10, a reducer module 12 is disposed on the other side, and a control module 13 is disposed on the top of the integrated housing 10;

[0034] A permanent magnet synchronous motor 20 is detachably mounted in the motor cavity 11 .

[0035] The permanent magnet synchronous motor 20 provided has lower vibration and noise during operation compared to ordinary motors; it can also provide higher power output at the same volume and weight, and is particularly suitable for applications with limited space; and due to the presence of permanent magnets, the motor can maintain a higher efficiency under low speed and light load conditions, and is suitable for energy-saving applications.

[0036] The motor cavity 11 is a cylindrical cavity. The motor module, the reducer module, the control module 13 and the electrical connections between the modules are all prior art.

[0037] like Figure 4 , Fig. 9 As shown, Figure 4 What is shown is a schematic diagram of the main structure of the permanent magnet synchronous motor installation in the embodiment; Fig. 9 It is shown that Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0038] The integrated housing 10 is provided with a front cover 32 that closes the open end of the motor cavity 11, and the output shaft of the permanent magnet synchronous motor 20 extends to the outside through the front cover 32; a positioning cylinder 31 is provided inside the motor cavity 11 and at one end away from the front cover 32, and the end of the permanent magnet synchronous motor 20 away from the output shaft is inserted into the positioning cylinder 31;

[0039] The opening end of the motor cavity 11 is provided with a step surface 33 , a sound insulation pad 1 34 is provided on the step surface 33 , and a sound insulation pad 2 35 is provided at the junction of the edge of the front cover 32 and the step surface 33 .

[0040] The front cover 32 not only seals the motor cavity 11 , but also assists in supporting the permanent magnet synchronous motor 20 . The front cover 32 and the positioning tube 31 support and position the two ends of the permanent magnet synchronous motor 20 , facilitating the installation and fixation of the permanent magnet synchronous motor 20 .

[0041] The sound insulation pad 1 34 and the sound insulation pad 2 35 are both made of rubber. The step surface 33 facilitates the clamping installation of the front cover 32. The front cover 32 is detachably installed on the integrated housing 10 by bolts.

[0042] By providing the sound insulation pad 1 34 and the sound insulation pad 2 35, the vibration generated by the output shaft of the permanent magnet synchronous motor 20 can be buffered, thereby reducing the working noise; and the stability of the installation of the front cover 32 can be increased through the cooperation and extrusion between rubber and rubber.

[0043] like Figure 4 , Figure 5 , Figure 6 As shown, Figure 4 What is shown is a schematic diagram of the main structure of the permanent magnet synchronous motor installation in the embodiment; Figure 5 What is shown is a side view structural diagram of the permanent magnet synchronous motor installation in the embodiment; Figure 6It is shown that Figure 5 A schematic diagram of the structure enlargement in the middle;

[0044] A positioning groove 42 is provided on the inner wall of the motor cavity 11;

[0045] It also includes a fixing ring 41 sleeved on the outside of the permanent magnet synchronous motor 20 , and a positioning block 43 extending out of the surface of the fixing ring 41 is elastically provided. The positioning block 43 is embedded in the positioning groove 42 when the permanent magnet synchronous motor 20 is installed.

[0046] In this embodiment, there are four positioning grooves 42, two at the upper end and two at the lower end, and the number and position of the positioning blocks 43 correspond to the positioning grooves 42;

[0047] The fixing ring 41 is sleeved on the outside of the permanent magnet synchronous motor 20 , and the positioning block 43 is elastically arranged on the fixing ring 41 . The arrangement of the positioning block 43 and the positioning groove 42 makes the installation of the permanent magnet synchronous motor 20 in the motor cavity 11 more stable.

[0048] By providing a fixing ring 41 and a plurality of positioning blocks 43 and adopting a multi-point support structure, the vibration of the permanent magnet synchronous motor 20 can be more evenly dispersed, local stress concentration can be reduced, and the noise can be further reduced.

[0049] During installation, before placing the permanent magnet synchronous motor 20 with the fixing ring 41 into the motor cavity 11, the positioning block 43 is compressed by external force to move it close to the fixing ring 41 until it can smoothly enter the motor cavity 11, and then the positioning block 43 is made to correspond to the position of the positioning groove 42 in the motor cavity 11. The external force is removed and the positioning block 43 is reset. At this time, the positioning block 43 is embedded in the positioning groove 42.

[0050] like Fig.10 As shown, Fig.10 is a schematic structural diagram of the positioning block 43;

[0051] The exterior of the positioning block 43 is covered with a sound insulation pad 431 .

[0052] By means of the sound insulation pad 3 431 arranged outside the positioning block, the noise is further reduced on the basis of the multi-point support structure.

[0053] A connecting rod 44 is provided at one end of the positioning block 43 close to the fixed ring 41, and the other end of the connecting rod 44 passes through the fixed ring 41 and extends to the inner side of the fixed ring 41, and a connecting plate 45 and elastic sound insulation cotton 47 are also provided at this end in sequence, and the elastic sound insulation cotton 47 is attached to the surface of the permanent magnet synchronous motor 20, and a spring 46 is also sleeved on a section outside the connecting rod 44 and located between the connecting plate 45 and the inner wall of the fixed ring 41; the two ends of the spring 46 are respectively connected to the connecting plate 45 and the inner wall of the fixed ring 41.

[0054] The elastic sound-insulating cotton 47 is a memory foam with high elasticity, which can be deformed when squeezed by external force and quickly return to its original shape after the external force is removed, and has excellent sound-absorbing performance.

[0055] The elastic setting of the positioning block 43 is realized by setting the connecting rod 44, the connecting plate 45, the elastic sound insulation cotton 47 and the spring 46; during installation, an external force is applied to the connecting plate 45, so that the connecting plate 45 drives the positioning block 43 to move toward one end close to the permanent magnet synchronous motor 20 through the connecting rod 44. At this time, the spring 46 is stretched and the elastic sound insulation cotton 47 is compressed on the outer wall of the permanent magnet synchronous motor 20 until the permanent magnet synchronous motor 20 and the fixing ring 41 can smoothly enter the motor cavity 11. After entering, when the positioning block 43 corresponds to the positioning groove 42, the external force is removed. At this time, the elastic sound insulation cotton 47 and the spring 46 are reset, and the positioning block 43 is stably embedded in the positioning groove 42.

[0056] The elastic sound-insulating cotton 47 can not only assist in installing the positioning block 43, but also absorb vibration and reduce noise.

[0057] like Figure 7 As shown, Figure 7 Shown is a schematic diagram of a connecting plate in an embodiment;

[0058] The connecting plate 45 is provided with a plurality of through holes 451 spaced apart from each other;

[0059] The through hole 451 reduces weight and saves cost.

[0060] like Figure 5 , Figure 8 As shown, Figure 5 What is shown is a side view structural diagram of the permanent magnet synchronous motor installation in the embodiment; Figure 8 Shown is a schematic diagram of a fixing frame and a second sound insulation cotton in an embodiment;

[0061] A fixing frame 48 is symmetrically arranged on the inner side of the fixing ring 41 , and a sound insulation pad 49 is arranged at one end of the fixing frame 48 close to the permanent magnet synchronous motor 20 ; the sound insulation pad 49 is in contact with the outer wall of the permanent magnet synchronous motor 20 .

[0062] The fixing frame 48 serves to install the sound insulation pad 49. The sound insulation pad 49 is not easy to deform. It is arranged in a close contact with the outer wall of the permanent magnet synchronous motor 20. On the one hand, it plays a role in buffering vibration and reducing noise; on the other hand, it supports the permanent magnet synchronous motor 20, so that the fixing ring 41 can be stably mounted on the outside of the permanent magnet synchronous motor 20.

[0063] Working principle: The fixing ring 41 is sleeved on the outside of the permanent magnet synchronous motor 20, and then the permanent magnet synchronous motor 20 and the fixing ring 41 are installed together into the motor cavity 11. During installation, an external force is applied to the connecting plate 45, so that the connecting plate 45 drives the positioning block 43 to move toward one end close to the permanent magnet synchronous motor 20 through the connecting rod 44. At this time, the spring 46 is stretched, and the elastic sound insulation cotton 47 is compressed on the outer wall of the permanent magnet synchronous motor 20 until the permanent magnet synchronous motor 20 and the fixing ring 41 can smoothly enter the motor cavity 11. After entering, after the positioning block 43 corresponds to the positioning groove 42, the external force is removed. At this time, the elastic sound insulation cotton 47 and the spring 46 are reset, and the positioning block 43 is stably embedded in the positioning groove 42. In addition, the rear end of the permanent magnet synchronous motor 20 is inserted into the positioning cylinder 31 at the same time, and finally the front cover 32 is installed by bolts.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. Permanent magnet synchronous drive and hydraulic integrated power system, characterized in that: include: An integrated housing (10), wherein two motor cavities (11) are provided on one side of the integrated housing (10), and a permanent magnet synchronous motor (20) is detachably installed in the motor cavity (11); A positioning groove (42), wherein the positioning groove (42) is arranged on the inner wall of the motor cavity (11); A fixing ring (41), wherein the fixing ring (41) is sleeved on the outside of the permanent magnet synchronous motor (20), and a plurality of positioning blocks (43) extending out of the surface of the fixing ring (41) are elastically provided on the fixing ring (41), and a connecting rod (44) is provided at one end of the positioning block (43) close to the fixing ring (41), and the other end of the connecting rod (44) passes through the fixing ring (41) and extends to the inside of the fixing ring (41), and the end of the connecting rod (44) is also sequentially provided with a connecting plate (45) and elastic sound insulation cotton (47), and the elastic sound insulation cotton (47) is attached to the surface of the permanent magnet synchronous motor (20), and a spring (46) is also sleeved on a section of the outside of the connecting rod (44) and located between the connecting plate (45) and the inner wall of the fixing ring (41).

2. The permanent magnet synchronous drive and hydraulic integrated power system according to claim 1 is characterized in that: The integrated housing (10) is provided with a front cover (32) for sealing the open end of the motor cavity (11); the output shaft of the permanent magnet synchronous motor (20) passes through the front cover (32) and extends to the outside; a positioning cylinder (31) is provided inside the motor cavity (11) and at one end away from the front cover (32); and the end of the permanent magnet synchronous motor (20) away from the output shaft is inserted into the positioning cylinder (31).

3. The permanent magnet synchronous drive and hydraulic integrated power system according to claim 2 is characterized in that: The opening end of the motor cavity (11) is provided with a step surface (33), a sound insulation pad (34) is provided on the step surface (33), and a sound insulation pad (35) is provided at the junction of the edge of the front cover (32) and the step surface (33).

4. The permanent magnet synchronous drive and hydraulic integrated power system according to claim 1 is characterized in that: A fixing frame (48) is symmetrically arranged on the inner side of the fixing ring (41), and a sound insulation pad (49) is arranged at one end of the fixing frame (48) close to the permanent magnet synchronous motor (20), and the sound insulation pad (49) is in contact with the outer wall of the permanent magnet synchronous motor (20).

5. The permanent magnet synchronous drive and hydraulic integrated power system according to claim 1 is characterized in that: The exterior of the positioning block (43) is coated with a sound insulation pad three (431).

6. The permanent magnet synchronous drive and hydraulic integrated power system according to claim 1, characterized in that: The connecting plate (45) is provided with a plurality of through holes (451) spaced apart from each other.

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