Vibration and noise reduction cycloid hydraulic motor

Abstract

The utility model relates to the technical field of hydraulic motors, in particular to a novel balance rotor structure which comprises a balance rotor, the balance rotor is connected between a cycloidal gear and an output shaft, a spline groove is formed in the middle of the balance rotor, six threaded holes are formed in the balance rotor, the threaded holes are adjacent to each other by 60 degrees, and the length of the threaded holes is about twice that of the balance rotor 2. The balance rotor is composed of six bolts, the bolts are matched with the threaded holes, the linkage shaft rotates to drive the balance rotor set to rotate, and vibration of the motor is reduced through centrifugal force generated by the structure. The vibration and noise reduction cycloid hydraulic motor has the advantages of being stable in work, simple and convenient in structure and low in noise.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic motors, in particular to a vibration-reducing and noise-reducing cycloid hydraulic motor. Background Art

[0002] Hydraulic motor, also known as oil motor, is a traditional device that converts liquid pressure energy into mechanical energy. Cycloidal hydraulic motor is a commonly used hydraulic motor. It is a low-speed, high-torque motor with the advantages of small size, high unit power density, high efficiency and wide speed range. It is widely used in plastic machinery, construction machinery, lifting and transportation machinery, fishery machinery, special machine tools and other equipment.

[0003] Due to the unique structure of the cycloidal hydraulic motor, the vibration generated by the cycloidal hydraulic motor mainly comes from the collision between the cycloidal wheel and the stator when it rotates. At present, the measures to alleviate the vibration of the cycloidal hydraulic motor are mostly concentrated on installing a vibration-damping base on the outside. The installation of the base is cumbersome and difficult to move after the base is installed; or a balancing rotor is installed on the other side of the cycloidal hydraulic motor. However, installing a balancing rotor on the outside of the motor has the following disadvantages: 1. The balancing rotor is far away from the vibration source of the motor, so the effect of balancing the vibration is poor, and it may even fail to achieve a vibration reduction effect; 2. When installing the balancing rotor externally, another output shaft needs to be opened on the other side of the motor output to connect the balancing rotor. The motor is large in size and has high installation precision, which increases the kinetic energy loss of the motor. Summary of the invention

[0004] The technical problem to be solved by the present invention is: the current cycloid motor will also cause pressure imbalance in the cycloid structure due to the pressure difference. Usually, a balance plate structure is set between the stator and the rear cover. Although this overcomes the imbalance problem, on the one hand, such a structure installed on the outside makes the structure of the motor itself have an additional output end compared with before, the volume of the motor is also greatly increased, and it causes a part of the output kinetic energy of the motor to be lost; on the other hand, such a structure requires the balance plate to be readjusted every time the motor moves, and also requires higher positioning accuracy.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a vibration-damping and noise-reducing cycloidal hydraulic motor, comprising an output shaft, a needle bearing, a first linkage shaft, a second linkage shaft and a cycloidal wheel, a balancing rotor group is arranged between the output shaft and the first linkage shaft, one end of the second linkage shaft is connected to the balancing rotor group, and the other end of the second linkage shaft is connected to the cycloidal wheel, and the balancing rotor group comprises a balancing rotor and bolts.

[0006] The balancing rotor is provided with six threaded holes matched with bolts.

[0007] The interior of the balancing rotor shell is matched with the balancing rotor, and a through hole larger than the threaded hole is opened at the same position of the bolts on the balancing rotor shell and the balancing rotor assembly.

[0008] A balancing rotor housing is arranged outside the balancing rotor assembly.

[0009] An auxiliary disk and a shell are sequentially arranged on the right side of the balancing rotor shell.

[0010] A linkage shaft driven by a cycloidal wheel is arranged inside the auxiliary disk, a distribution disk is arranged outside the linkage shaft and inside the shell, a damping groove is opened on the distribution window of the distribution disk, and the shape of the damping groove can be a circular arc groove or a triangular groove.

[0011] The beneficial effects of the present invention are:

[0012] (1) A vibration-reducing and noise-reducing cycloidal hydraulic motor of the present invention reduces the vibration caused by the unique movement of the cycloidal wheel by installing a balancing rotor group on one side of the cycloidal wheel, and reduces the vibration caused by the cycloidal wheel through the centrifugal force generated by the rotation of the balancing rotor group, and adds a damping groove on the distribution window of the distribution plate to reduce the vibration of the motor and reduce the noise, thereby effectively extending the service life of the motor;

[0013] (2) Through holes are opened on the outer shell of the balancing rotor, and the positions of the bolts can be adjusted through the through holes, so that the vibration reduction function is achieved while integrating it into the motor, making the motor structure simple and the operation very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 It is a schematic diagram of a bolt of the utility model.

[0017] Figure 3 It is a schematic diagram of a balanced rotor of the utility model.

[0018] Figure 4 It is a perspective view of the balanced rotor assembly of the utility model.

[0019] Figure 5 It is a schematic diagram of a balanced rotor housing of the utility model.

[0020] Figure 6 It is a schematic diagram of the distribution plate of the utility model.

[0021] Explanation of the reference numerals: 1-output shaft; 2-needle bearing; 3-first linkage shaft; 4-second linkage shaft; 5-cycloid wheel; 6-bolt; 7-balance rotor; 8-balance rotor housing; 9-linkage shaft; 10-distribution plate; 11-auxiliary plate; 12-housing; 13-triangular groove. DETAILED DESCRIPTION

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Figure 1 , Figure 2 and Figure 3 The cycloid wheel 5 shown drives the first linkage shaft 3 to rotate through movement, and the second linkage shaft 4 drives the balance rotor group to rotate, and then drives the first linkage shaft 3 to rotate, and finally transmits the kinetic energy to the output shaft 1, on which a needle bearing 2 is installed; on the other side, the cycloid wheel 5 drives the distribution plate 10 to rotate through the linkage shaft 9, thereby continuously changing the positions of the high and low pressure oil chambers to achieve continuous operation.

[0025] like Figure 2-5 As shown, the vibration-damping and noise-reducing cycloid hydraulic motor provided by the utility model includes a balanced rotor group and a balanced stator housing. A spline groove is opened in the middle of the balanced rotor group, and the spline groove is connected to the first linkage shaft 3 and the second linkage shaft 4. One end of the first linkage shaft 3 is connected to the balanced rotor, and the other end is connected to the output shaft 1; one end of the second linkage shaft 4 is connected to the balanced rotor group, and the other end is connected to the cycloid wheel 5. The cycloid wheel 5 rotates, thereby driving the balanced rotor group to rotate, and finally transferring the kinetic energy to the output shaft 1.

[0026] The balancing rotor assembly includes a balancing rotor 7 and a bolt 6. The balancing rotor 7 is as shown in FIG. Figure 3 As shown, six threaded holes are provided, and the bolts 6 are composed of six bolts. The balanced rotor assembly can be formed by matching the bolts 6 with the threaded holes. The balanced rotor housing 8 is matched with the balanced rotor 7 inside, and a through hole larger than the threaded hole is provided at the same position of the bolts 6 on the balanced rotor housing 8 and the balanced rotor assembly.

[0027] like Figure 2As shown, the bolt 6 cooperates with the balancing rotor 7, and a slot is provided on the top of the bolt 6. Then, the bolt 6 can be rotated by a screwdriver outside the balancing rotor housing 8 to achieve the up and down movement of the bolt 6 in the threaded hole.

[0028] like Figure 3 As shown, the balancing rotor 7 has a spline groove in the middle connected to the first linkage shaft 3 and the second linkage shaft 4, and six threaded holes are opened inside, with an interval of 60° between two adjacent threaded holes, and the depth of the threaded hole is approximately twice the length of the bolt, so that the bolt 6 can have a sufficient movement range in the threaded hole, giving it a larger adjustment range.

[0029] Specifically, Figure 4 The perspective view of the balanced rotor group is shown. Here, we use a screwdriver to rotate the bolts 6 in the balanced rotor housing 8 in a positive or reverse direction through the through holes. When the six bolts 6 are located at different positions, the center distance of the bolts 6 relative to the balanced rotor group changes, and the center of mass of the corresponding balanced rotor 7 also changes. At this time, the centrifugal force brought by the rotating balanced rotor 7 will also change. When the bolts 6 are adjusted to a certain position, the centrifugal force and the vibration of the motor are neutralized in an ideal situation, thereby reducing the vibration of the motor and improving the performance of the motor.

[0030] like Figure 6 As shown, the distribution disc 10 adds a damping groove 13 in the distribution window, thereby reducing the flow pulsation rate that increases instantaneously when the distribution disc 10 is connected to or disconnected from the working chamber. Such a design can effectively reduce vibration and noise similar to that of a motor. On the other hand, the distribution disc 10 of the original structure does not have the damping groove 13, so that the distribution disc 10 will always have an instantaneous increase or decrease in the speed and torque of the distribution disc 10 every time the distribution disc 10 fills or discharges oil from the working chamber. In comparison, the above problem can be alleviated by adding the damping groove 13.

[0031] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A vibration-reducing and noise-reducing cycloid hydraulic motor, comprising an output shaft (1), a needle bearing (2), a first linkage shaft (3), a second linkage shaft (4) and a cycloid wheel (5), wherein: A balancing rotor group is provided between the output shaft (1) and the first linkage shaft (3); one end of the second linkage shaft (4) is connected to the balancing rotor group; the other end of the second linkage shaft (4) is connected to the cycloid wheel (5); the balancing rotor group comprises a balancing rotor (7) and a bolt (6); A balancing rotor housing (8) is arranged outside the balancing rotor assembly.

2. The vibration and noise reduction cycloid hydraulic motor according to claim 1, characterized in that: The balancing rotor (7) is provided with six threaded holes which match the bolts (6).

3. The vibration and noise reduction cycloid hydraulic motor according to claim 1, characterized in that: The interior of the balancing rotor housing (8) matches the balancing rotor (7), and a through hole larger than the threaded hole is opened at the same position of the bolt (6) on the balancing rotor housing (8) and the balancing rotor (7).

4. The vibration-reducing and noise-reducing cycloid hydraulic motor according to claim 1 is characterized by: An auxiliary disk (11) and a housing (12) are sequentially arranged on the right side of the balancing rotor housing (8).

5. The vibration-reducing and noise-reducing cycloid hydraulic motor according to claim 4 is characterized in that: A linkage shaft (9) driven by a cycloidal wheel (5) is arranged inside the auxiliary disk (11); a distribution disk (10) is arranged outside the linkage shaft (9) and inside the housing (12); a damping groove (13) is opened on the distribution window of the distribution disk (10); the damping groove (13) may be in the shape of a circular arc groove or a triangular groove.

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