End face distribution motor

Abstract

This application provides an end-face distribution motor, comprising: a housing; an output shaft inserted into the housing; a distribution plate disposed within the housing; a drive shaft disposed within the housing, one end of which is connected to the output shaft, and the other end of which has an axially extending connecting hole; a rotor-stator assembly disposed within the housing and sleeved on the drive shaft; and a linkage shaft disposed within the housing, a first end of which is inserted into the connecting hole of the drive shaft and connected to it, and a second end of which is connected to the distribution plate. The end-face distribution motor provided by this application simultaneously possesses the characteristics of high rotational speed and high torque, and also exhibits stable rotation and long service life.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to an end-face distribution motor. Background Technology

[0002] The end-face distribution motor is a hydraulic motor that adopts an end-face distribution structure. It mainly achieves oil circuit control through the cooperation of the distribution plate and connecting components. It has the characteristics of bidirectional output torque balance and compact structure. At present, the structure of end-face distribution motors is similar, and they cannot simultaneously meet the characteristics of high rotational speed, high torque and rotational stability. They are inefficient and have a short service life. Utility Model Content

[0003] In order to overcome the defects in the prior art, this utility model provides an end face distribution motor that can simultaneously have the characteristics of high rotational speed, large torque, stable rotation and long service life.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] This utility model discloses an end-face distribution motor, comprising:

[0006] case;

[0007] An output shaft is inserted into the housing.

[0008] A distribution plate, wherein the distribution plate is disposed within the housing;

[0009] A drive shaft is disposed inside the housing. One end of the drive shaft is connected to the output shaft, and the other end face of the drive shaft is provided with an axially extending connecting hole.

[0010] A rotor-stator pair is disposed within the housing and sleeved on the drive shaft;

[0011] A linkage shaft is disposed inside the housing. The first end of the linkage shaft is inserted into the connecting hole of the transmission shaft and connected to the transmission shaft, and the second end of the linkage shaft is connected to the distribution plate.

[0012] The motor provided in this application optimizes the thickness and eccentricity of the rotor-stator pair by inserting one end of the linkage shaft into the transmission shaft and connecting the other end to the distribution plate. This reduces the motor's no-load displacement, resulting in a higher rotational speed. The assembly process is simple, the manufacturing cost is low, the efficiency is high, and the overall structure is relatively compact, occupying little space. It is easy to install in various equipment and machinery and has a wide range of applications.

[0013] Furthermore, the linkage shaft is connected to the drive shaft and the distribution plate via splines. This spline connection allows for higher precision in the fit between the distribution plate and the linkage and drive shafts, ensuring stable transmission and enabling the switching of high and low pressure chambers, thus ensuring more accurate distribution of hydraulic oil to each working chamber.

[0014] Furthermore, both the first and second ends of the linkage shaft are provided with splines, and the positional tolerance of the spline teeth at the first and second ends is less than or equal to 0.01 mm. Controlling the spline tooth positional tolerance within 0.01 mm effectively reduces transmission instability caused by assembly errors, enabling the motor to maintain high volumetric efficiency even at high speeds. This ensures stable output and low noise during high-speed rotation. If the spline tooth positional tolerance exceeds this range, the motor's volumetric efficiency will decrease.

[0015] Furthermore, the second end of the drive shaft is connected to the rotor-stator pair via a spline, with the spline length of the rotor-stator pair being 7–11 mm and the spline length of the drive shaft being 6–8 mm. This spline length design ensures a stable connection between the drive shaft and the rotor-stator pair, guaranteeing sufficient contact area to withstand larger torques and effectively distribute forces during transmission. The spline length setting of the drive shaft also makes the motor run more smoothly, reducing vibration and noise caused by transmission instability.

[0016] Furthermore, the splines of the rotor-stator pair include internal splines and external splines, and the positional tolerance of the tooth profiles of the internal and external splines is less than or equal to 0.03 mm. When the positional tolerance of the tooth profiles of the internal and external splines is less than this range, the rotor-stator pair can reduce friction and wear caused by tooth profile deviation during torque transmission, enabling more precise hydraulic oil distribution, thereby reducing hydraulic oil leakage and energy loss, and allowing the motor to maintain high volumetric efficiency and mechanical efficiency even at high speeds.

[0017] Furthermore, the housing includes a first housing and a second housing. The output shaft is inserted into the first housing, and the distributor plate is disposed in the second housing. The first housing is used to fix the output shaft and ensure its stability, while the second housing is used to install the distributor plate to realize the hydraulic oil distribution function. The arrangement of the first and second housings allows the motor structure to be more compact, facilitating installation and maintenance.

[0018] Furthermore, a rotor-stator assembly is disposed between the first housing and the second housing, with a spacer between the first housing and the rotor-stator assembly, and a valve plate between the rotor-stator assembly and the second housing. The spacer and valve plate effectively support the rotor-stator assembly, ensuring its stability during high-speed rotation. They also provide a seal, preventing hydraulic oil leakage from the gap between the rotor-stator assembly and the housing, thus improving the motor's volumetric and mechanical efficiency.

[0019] Furthermore, the eccentricity of the rotor-stator pair is 2.1 to 2.5. By presetting the size of the eccentricity, this application can reduce the rotational amplitude of the motor while it is rotating at high speed, thereby maintaining rotational stability. When the eccentricity of the rotor-stator pair is set within this range, the wetted area of ​​the rotor-stator pair can be reduced. While maintaining the current thickness of the rotor-stator pair, the no-load displacement of the motor can be reduced, thereby increasing the motor speed.

[0020] Furthermore, a seal and a bearing are installed between the first housing and the drive shaft. The seal improves the motor's sealing performance, and the bearing is tightly fitted and fixed to the output shaft and the first housing, further ensuring stable operation of the motor at high speeds, thus making the motor's rotation smoother and more reliable.

[0021] Furthermore, a dustproof ring is installed between the first housing and the output shaft. The dustproof ring effectively prevents external dust and impurities from entering the motor, protecting critical motor components from contamination and wear, thereby extending the motor's service life.

[0022] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0023] 1. The motor provided in this application optimizes the thickness and eccentricity of the rotor-stator pair by inserting one end of the linkage shaft into the transmission shaft and connecting the other end to the distribution plate. This reduces the motor's no-load displacement, resulting in a higher rotational speed. Furthermore, the optimized eccentricity of the rotor-stator pair reduces the motor's rotation amplitude, ensuring stability even at high speeds. The assembly process is simple, the manufacturing cost is low, the efficiency is high, and the overall structure is compact, occupying little space. This makes it easy to install in various equipment and machinery, and it has a wide range of applications.

[0024] 2. By setting the length of the spline inside the drive shaft and the spline inside the rotor-stator pair, this application ensures that the motor can still bear a large torque when rotating at high speed. Compared with motors of the same type, the spline length of the rotor-stator pair and the drive shaft of the motor in this application is longer and more wear-resistant, which can make the motor have a longer service life.

[0025] To make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a cross-sectional view of an end-face distribution motor provided in an embodiment of the present utility model;

[0028] Figure 2 This is a spline front view of a rotor-stator pair provided in an embodiment of this utility model;

[0029] Figure 3 This is a top view of a stator-rotor pair provided in an embodiment of this utility model;

[0030] Figure 4 This is a structural diagram of a transmission shaft provided in an embodiment of the present utility model;

[0031] Figure 5 This is a structural diagram of an end-face distribution motor provided in an embodiment of this utility model.

[0032] The reference numerals in the above figures are as follows: 1. First housing; 2. Second housing; 3. Stator pair; 4. Output shaft; 5. Distribution plate; 6. Drive shaft; 7. Linkage shaft; 8. Internal spline; 9. External spline; 10. Partition plate; 11. Valve plate; 12. Seal; 13. Bearing; 14. Dust ring. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. In addition, the accompanying drawings of the present invention are only simple schematic illustrations and are not depictions based on actual dimensions, as stated in advance.

[0034] In this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "forward," "backward," "between," "nearer," and "farthest" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.

[0036] Reference Figures 1-5 This application provides an end-face distribution motor, including a housing and a rotor-stator pair 3, an output shaft 4, a distribution plate 5, a drive shaft 6, and a linkage shaft 7 disposed inside the housing. The housing includes a first housing 1 and a second housing 2. The output shaft 4 is inserted into the first housing 1. One end of the drive shaft 6 is connected to the output shaft 4, and the other end has an axially extending connecting hole. The rotor-stator pair 3 is sleeved on the drive shaft 6. The first end of the linkage shaft 7 is inserted into the connecting hole of the drive shaft 6 and connected to it, and the second end of the linkage shaft 7 is connected to the distribution plate 5.

[0037] like Figure 1 and Figure 5 As shown, the rotor-stator pair 3 is located between the first housing 1 and the second housing 2. A partition 10 is provided between the first housing 1 and the rotor-stator pair 3, and a valve plate 11 is provided between the rotor-stator pair 3 and the second housing 2. Optionally, the first housing 1, the partition 10, the rotor-stator pair 3, the valve plate 11, and the second housing 2 are fastened together by bolts, which makes the connection and installation simple and easy to disassemble and assemble.

[0038] The second housing 2 has three oil holes that communicate with the distribution plate 5 and are connected to the oil supply circuit through oil pipes. The three oil holes are the oil inlet, oil outlet and oil drain.

[0039] To improve the overall sealing performance of the motor, a seal 12 is installed between the first housing 1 and the drive shaft 6, and a dustproof ring 14 is installed between the first housing 1 and the output shaft 4.

[0040] A bearing 13 is also provided between the first housing 1 and the drive shaft 6. Optionally, the bearing 13 is a double-row deep groove ball bearing. Deep groove ball bearings are suitable for high-speed or even extremely high-speed operation, are durable, and require little maintenance. Figure 1 As shown, the double-row deep groove ball bearing is tightly connected and fixed to the output shaft 4 and the first housing 1, which can ensure the stability of the motor when rotating at high speed.

[0041] In this embodiment, both the first and second ends of the linkage shaft 7 are provided with splines, so that the linkage shaft 7 is connected to the transmission shaft 6 and the distribution plate 5 through splines. Thus, the rotor-stator pair 3 and the distribution plate 5 are connected by a dual-module tooth profile machining method, so that they form a positional relationship for switching between high and low pressure chambers, thereby distributing hydraulic oil to each chamber.

[0042] Specifically, the positional tolerance of the spline teeth at the first and second ends of the linkage shaft 7 must be maintained within a preset range to ensure the smooth operation of the motor. Optionally, the positional tolerance of the spline teeth at the first and second ends of the linkage shaft 7 is less than or equal to 0.01 mm. The positional tolerance of the spline teeth refers to the alignment of the spline teeth at the first and second ends.

[0043] In this embodiment, both ends of the drive shaft 6 have splines, the rotor-stator pair 3 includes splines, and the drive shaft 6 and the rotor-stator pair 3 are connected by splines.

[0044] In this embodiment, the length of the spline inside the rotor-stator pair 3 is 7-11 mm to ensure that the drive shaft 6 and the rotor-stator pair 3 can withstand a large torque while having a high rotational speed. The length of the spline is the length of the spline teeth along a first direction, which is the direction from the first housing 1 to the second housing 2, specifically as follows... Figure 3 W1 is shown in the figure.

[0045] In this embodiment, the length of the spline inside the drive shaft 6 is 6-8 mm, specifically as follows: Figure 4 W2 is shown.

[0046] like Figure 2 As shown, the splines of the rotor-stator pair 3 include an internal spline 8 and an external spline 9. In this embodiment, the positional tolerance of the tooth profiles of the internal spline 8 and the external spline 9 is less than or equal to 0.03 mm. The drive shaft 6 is inserted into the internal spline of the rotor-stator pair 3. The positional tolerance of the spline tooth profile refers to the alignment of the spline teeth of the internal spline 8 and the external spline 9.

[0047] The rotor-stator assembly 3 includes a rotor assembly and a stator assembly, and has a preset eccentricity. Optionally, the eccentricity of the rotor-stator assembly is 2.1 to 2.5 to minimize the wetted area of ​​the rotor-stator assembly, thereby reducing the no-load displacement of the motor and increasing the motor speed. Here, eccentricity refers to the distance between the outer circle of the rotor and the inner circle of the stator, and wetted area is the contact area between the hydraulic oil and the rotor-stator assembly 3 as the hydraulic oil passes through the inner cavity of the rotor-stator assembly 3.

[0048] Working principle:

[0049] The motor in this application has an end-face distribution structure. One end of the linkage shaft 7 is inserted into the transmission shaft 6, and the other end is connected to the distribution plate 5. This reduces the thickness of the rotor-stator pair 3. By setting the eccentricity to 2.1 to 2.5, the no-load displacement of the motor can be reduced, thereby enabling the motor to have a higher rotational speed and maintain stability at high speed. Furthermore, while reducing the thickness of the rotor-stator pair 3, the length of the spline inside the transmission shaft 6 is set to 6 to 8 mm, and the length of the spline inside the rotor-stator pair 3 is set to 7 to 11 mm. This allows the motor to maintain a large torque even at high speed and enables the motor to have a longer service life.

[0050] This utility model uses specific embodiments to illustrate the principle and implementation of the utility model. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the utility model. Therefore, the content of this specification should not be construed as a limitation of the utility model.

Claims

1. A face-mounted current distribution motor, characterized in that, include: case; An output shaft is inserted into the housing. A distribution plate, wherein the distribution plate is disposed within the housing; A drive shaft is disposed inside the housing. One end of the drive shaft is connected to the output shaft, and the other end face of the drive shaft is provided with an axially extending connecting hole. A rotor-stator pair is disposed within the housing and sleeved on the drive shaft; A linkage shaft is disposed inside the housing. The first end of the linkage shaft is inserted into the connecting hole of the transmission shaft and connected to the transmission shaft, and the second end of the linkage shaft is connected to the distribution plate.

2. The end-face distribution motor according to claim 1, characterized in that, The linkage shaft is connected to the drive shaft and the distribution plate via splines.

3. The end-face distribution motor according to claim 2, characterized in that, Both the first and second ends of the linkage shaft are provided with splines, and the positional tolerance of the tooth profile of the splines at the first and second ends is less than or equal to 0.01 mm.

4. The end-face distribution motor according to claim 1, characterized in that, The second end of the drive shaft is connected to the rotor-stator pair via a spline, and the spline length of the rotor-stator pair is 7-11 mm, while the spline length of the drive shaft is 6-8 mm.

5. The end-face distribution motor according to claim 4, characterized in that, The splines of the rotor-stator pair include internal splines and external splines, and the positional tolerance of the tooth profiles of the internal splines and the external splines is less than or equal to 0.03 mm.

6. The end-face distribution motor according to claim 1, characterized in that, The housing includes a first housing and a second housing, the output shaft is inserted into the first housing, and the distribution plate is disposed in the second housing.

7. The end-face distribution motor according to claim 6, characterized in that, The rotor-stator assembly is disposed between the first housing and the second housing, a partition is provided between the first housing and the rotor-stator assembly, and a valve plate is provided between the rotor-stator assembly and the second housing.

8. The end-face distribution motor according to claim 1, characterized in that, The eccentricity of the rotor-stator pair is 2.1 to 2.

5.

9. The end-face distribution motor according to claim 6, characterized in that, A seal and a bearing are installed between the first housing and the drive shaft.

10. The end-face distribution motor according to claim 6, characterized in that, A dustproof ring is installed between the first housing and the output shaft.

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