Inclined shaft motor and vehicle
By setting a limit structure in the servo cavity to define the position of the control plunger and the distribution plate, the problems of poor stability of the existing oblique shaft hydraulic motor when adjusting the minimum displacement and the screws are easily broken, achieving the minimum displacement The stability limitation and the reliability of the motor are improved.
Patent Information
- Application Number
- CN202421172700.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-05-27
AI Technical Summary
When adjusting the minimum displacement, existing inclined shaft hydraulic motors have poor stability and easy breakage of displacement adjustment screws, resulting in damage to the rotating components and huge losses.
By setting a limit structure in the servo cavity, when the variable displacement of the control plunger is driven by high-pressure oil, the limit structure defines the stroke of the control plunger, thereby limiting the position of the distributor plate, and thus limiting the minimum clamp between the spindle and the cylinder block The angle and the stroke of the transmission plunger achieve stable limitations of minimum displacement.
It effectively solves the problems of poor stability during minimum displacement adjustment and the prone to breaking screws, and improves the reliability and service life of the motor.
Smart Images
Figure CN222513552U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of machinery, and in particular to a bent-axis motor and a vehicle. Background Art
[0002] Compared with swash plate hydraulic motors, the bent axis hydraulic motors have obvious advantages in terms of maximum speed, power density, size, resistance to sudden load shocks, and maximum efficiency. As power actuators, they are widely used in industry, engineering, military industry, and marine engineering.
[0003] In the existing helical axis hydraulic motor, the position of the valve plate is limited by the minimum displacement adjustment screw. The minimum displacement of the motor is set by adjusting the minimum displacement adjustment screw. When the minimum displacement adjustment screw is turned in, the minimum displacement of the motor increases, and when the minimum displacement adjustment screw is turned out, the minimum displacement of the motor decreases. Utility Model Content
[0004] The utility model discloses a bent-axis motor and a vehicle, which are used to limit the minimum displacement of the motor in another way.
[0005] In order to achieve the above object, the utility model provides the following technical solutions:
[0006] In a first aspect, a bevel axis motor is provided, which comprises: a rear cover, a cylinder body, a main shaft, a transmission plunger, a distribution plate, a finger and a control plunger; the axis of the main shaft is set at an angle with the axis of the cylinder body, and is connected by a plurality of transmission plungers; the rear cover is located on the side of the cylinder body away from the main shaft, and the distribution plate is clamped between the rear cover and the cylinder body; a servo cavity is provided in the rear cover, and the control plunger is located in the servo cavity and slides along the inner wall of the servo cavity, and is used to drive the distribution plate to swing along the surface of the rear cover by the finger; a limiting structure is provided on one axial side of the control plunger in the servo cavity, and when the angle between the axis of the main shaft and the axis of the cylinder body is the smallest, the control plunger abuts against the limiting structure.
[0007] In the above-mentioned bent-axis motor, when the high-pressure oil pushes the control plunger to change the displacement, the limiting structure in the servo chamber limits the stroke of the control plunger, and thus limits the position of the distribution plate, thereby limiting the minimum angle between the axis of the main shaft and the axis of the cylinder body, and thus limiting the stroke of the transmission plunger, and further limiting the minimum displacement.
[0008] Optionally, the limiting structure and the back cover are split structures.
[0009] Optionally, the limiting structure is made of stainless steel.
[0010] Optionally, the limiting structure comprises a cylinder coaxial with the control plunger.
[0011] Optionally, the cylinder contacts and has an interference fit with the inner wall of the servo cavity.
[0012] Optionally, the axial length of the cylinder is one third to one half of the axial length of the control plunger.
[0013] Optionally, the wall thickness of the cylinder is between 3 mm and 5 mm.
[0014] Optionally, it also includes an elastic return member arranged between the control plunger and the bottom surface of the servo cavity, and the elastic return member is used to provide an elastic return force for the control plunger to move away from the cylinder along the axial direction; the elastic return member is located in the space surrounded by the cylinder.
[0015] Optionally, the limiting structure includes a support rod, which is fixedly connected to the bottom surface of the servo cavity; the bevel axis motor also includes a coil spring arranged between the control plunger and the bottom surface of the servo cavity, and the coil spring is used to provide an elastic reset force for the control plunger away from the cylinder along the axial direction; the support rod is located in the space enclosed by the coil spring.
[0016] Optionally, the limiting structure and the back cover are an integrated structure.
[0017] Optionally, the limiting structure includes a boss formed on an inner wall of the servo cavity.
[0018] In a second aspect, a vehicle is provided, the vehicle comprising the bent-axis motor described in any of the above technical solutions.
[0019] The advantages of the vehicle described above and the above-mentioned bent-axis motor over the prior art are the same and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A schematic diagram of the structure of a bent-axis motor provided in an embodiment of the present application. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] refer to Figure 1The helical axis motor provided by the embodiment of the present application includes: a rear cover 3, a cylinder body 9, a main shaft 4, a transmission plunger, a distribution plate 6, a finger 7 and a control plunger 5; the axis of the main shaft 4 is set at an angle with the axis of the cylinder body 9, and is connected by a plurality of transmission plungers, for example, the transmission plunger is connected to the main shaft 4 by spherical rotation, and is connected to the plunger groove of the cylinder body 9 by sliding, and the matching mode here is similar to the conventional common helical axis motor; the rear cover 3 is located on the side of the cylinder body 9 away from the main shaft 4, and the distribution plate 6 is clamped between the rear cover 3 and the cylinder body 9; the rear cover 3 has a servo cavity 12, the control plunger 5 is located in the servo cavity 12, and slides along the inner wall of the servo cavity 12, and is used to drive the distribution plate 6 to swing along the surface of the rear cover 3 through the finger 7; a limiting structure 8 is provided on one side of the axial direction of the control plunger 5 in the servo cavity 12, and when the angle between the axis of the main shaft 4 and the axis of the cylinder body 9 is the smallest, the control plunger 5 abuts against the limiting structure 8. Both ends of the control plunger 5 in the axial direction are connected to the hydraulic oil cavity.
[0023] In the above-mentioned bent-axis motor, when the high-pressure oil pushes the control plunger 5 to change the displacement, the limiting structure 8 in the servo chamber 12 limits the stroke of the control plunger 5, and thus limits the position of the distribution plate 6, thereby limiting the minimum angle between the axis of the main shaft 4 and the axis of the cylinder body 9, and thus limiting the stroke of the transmission plunger, and further limiting the minimum displacement.
[0024] The bent axis motor further comprises a cylindrical housing 1, in which the main shaft 4 and the cylinder body 9 are both located. The end of the housing 1 away from the rear cover 3 is provided with a front cover 2, and the main shaft 4 extends out of the front cover 2. The limiting structure 8 can abut against the bottom surface of the servo cavity 12.
[0025] In a specific embodiment, the limiting structure 8 and the rear cover 3 are split structures, so that the limiting structure 8 can be assembled into the servo cavity 12 after the limiting structure 8 and the rear cover 3 are processed separately, which has a simple process and low cost.
[0026] When the minimum displacement adjustment exceeds 70%, the displacement adjustment screw 10 will have the risk of breaking. Once the displacement adjustment screw 10 breaks, the entire rotating assembly will be damaged, resulting in huge losses. Therefore, the stability is relatively poor.
[0027] In a specific embodiment, the limiting structure 8 is made of stainless steel, such as 45 steel, which has a relatively strong structure and can stably limit the limiting structure 8 .
[0028] In a specific embodiment, the limiting structure 8 includes a cylinder coaxial with the control plunger 5. The cylinder may be a valve sleeve. Since the valve sleeve has high strength, it is not prone to breakage and has high reliability.
[0029] In a specific embodiment, the cylinder contacts and has an interference fit with the inner wall of the servo cavity 12 to prevent the cylinder from shaking. After the cylinder has an interference fit, the control plunger 5 can be limited more stably.
[0030] In a specific embodiment, the axial length of the cylinder is one third to one half of the axial length of the control plunger 5 to avoid too large a minimum displacement due to too large a length, or too small a length resulting in a minimum displacement close to zero.
[0031] In a specific embodiment, the wall thickness of the cylinder is between 3 mm and 5 mm, such as 3 mm, 4 mm and 5 mm, etc. It is avoided that the wall thickness is too small, resulting in insufficient strength and failure to stably limit the control plunger 5, or the wall thickness is too large, resulting in no space in the cylinder to accommodate structures such as the elastic reset member 11 such as the coil spring.
[0032] In a specific embodiment, an elastic reset member 11 is further included between the control plunger 5 and the bottom surface of the servo cavity 12. The elastic reset member 11 is used to provide an elastic reset force for the control plunger 5 to move away from the cylinder in the axial direction. The elastic reset member 11 is located in the space surrounded by the cylinder. The arrangement of the elastic reset member 11 enables the control plunger 5 to be reset in time after being driven by the hydraulic oil.
[0033] In a specific embodiment, the limiting structure 8 includes a support rod, which is fixedly connected to the bottom surface of the servo cavity 12; the bent axis motor also includes a coil spring disposed between the control plunger 5 and the bottom surface of the servo cavity 12, and the coil spring is used to provide an elastic reset force for the control plunger 5 to move away from the cylinder in the axial direction; the support rod is located in the space surrounded by the coil spring. The support rod and the coil spring realize spatial reuse and provide stable limiting in a limited space.
[0034] In a specific embodiment, the limiting structure 8 and the rear cover 3 are an integrated structure, which is beneficial for the limiting structure 8 to provide more stable support and limiting.
[0035] In a specific embodiment, the limiting structure 8 includes a boss formed on the inner wall of the servo cavity 12, and the boss is used to limit the control plunger 5, which has a simple and stable structure.
[0036] Based on the same inventive concept, an embodiment of the present application further provides a vehicle, which includes the bent-axis motor provided in the above embodiment, and the effect can refer to the bent-axis motor.
[0037] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
Claims
1. A bent axis motor, characterized in that: include: Rear cover, cylinder body, main shaft, transmission plunger, valve plate, dial finger and control plunger; The axis of the main shaft is arranged at an angle to the axis of the cylinder body, and is connected by transmission through a plurality of transmission plungers; The rear cover is located at a side of the cylinder body away from the main shaft, and the valve plate is clamped between the rear cover and the cylinder body; The rear cover has a servo cavity in it, the control plunger is located in the servo cavity and slides along the inner wall of the servo cavity, and is used to drive the distribution plate to swing along the surface of the rear cover by the finger; A limiting structure is provided on one axial side of the control plunger in the servo cavity, and when the angle between the axis of the main shaft and the axis of the cylinder body is the smallest, the control plunger abuts against the limiting structure.
2. The bent axis motor according to claim 1, characterized in that: The limiting structure and the rear cover are separate structures.
3. The bent axis motor according to claim 2, characterized in that: The material of the limiting structure is stainless steel.
4. The bent-axis motor according to claim 2 or 3, characterized in that: The limiting structure comprises a cylinder coaxial with the control plunger.
5. The bent-axis motor according to claim 4, characterized in that: The cylinder contacts and is interference-fitted with the inner wall of the servo cavity.
6. The bent-axis motor according to claim 4, characterized in that: The axial length of the cylinder is one third to one half of the axial length of the control plunger.
7. The bent-axis motor according to claim 4, characterized in that: The wall thickness of the cylinder is between 3 mm and 5 mm.
8. The bent-axis motor according to claim 4, characterized in that: It also includes an elastic reset member disposed between the control plunger and the bottom surface of the servo cavity, the elastic reset member being used to provide an elastic reset force for the control plunger to move away from the cylinder along the axial direction; The elastic reset member is located in the space surrounded by the cylinder.
9. The bent-axis motor according to claim 4, characterized in that: The limiting structure includes a support rod, and the support rod is fixedly connected to the bottom surface of the servo cavity; The bent axis motor further comprises a coil spring disposed between the control plunger and the bottom surface of the servo chamber, the coil spring being used to provide an elastic restoring force for the control plunger to move away from the cylinder along the axial direction; The support rod is located in the space surrounded by the coil spring.
10. The bent-axis motor according to claim 1, characterized in that: The limiting structure and the rear cover are an integrated structure.
11. The bent-axis motor according to claim 9, characterized in that: The limiting structure includes a boss formed on the inner wall of the servo cavity.
12. A means of transport, characterized in that: A bent-axis motor comprising the one of claims 1 to 11.