Integrated motor assembly and mechanical equipment

Abstract

The present invention provides an integrated motor assembly and mechanical equipment, belonging to the technical field of hydraulic motors, wherein the integrated motor assembly comprises: a housing, a hydraulic motor is arranged in the housing, and the displacement of the hydraulic motor is controlled by a swash plate; a variable control mechanism is also arranged in the housing, and the variable control mechanism is used to control the movement of the swash plate to change the swing angle; the integrated motor assembly of the present invention adopts a swash plate to control the displacement of the hydraulic motor, and the swash plate is driven by the variable control mechanism. The variable control mechanism and the hydraulic motor are integrated inside the housing. During installation, there is no need to separately assemble a proportional valve, which can improve the convenience and economy of the installation of the hydraulic motor.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic motors, and in particular to an integrated motor assembly and mechanical equipment. Background Art

[0002] The hydraulic motor is an actuator of the hydraulic system, which converts the liquid pressure energy provided by the hydraulic pump into the mechanical energy (torque and speed) of the output shaft. Among them, the liquid is the medium for transmitting force and motion.

[0003] In the prior art, hydraulic motors generally use an external specific pressure-stabilizing oil source to drive the variable piston of the motor, and adjust the active position of the variable piston by controlling the inclination angle of the swash plate, thereby controlling the displacement of the motor.

[0004] However, in the existing hydraulic motor, the proportional valve for controlling the inclination angle of the swash plate is arranged outside the motor. When installing the hydraulic motor, the proportional valve needs to be assembled separately, thereby increasing the use cost of the hydraulic motor. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of the hydraulic motor in the prior art that the proportional valve needs to be assembled separately during installation, thereby providing an integrated motor assembly and a mechanical device equipped with the integrated motor assembly.

[0006] In order to solve the above technical problems, the present invention provides an integrated motor assembly, comprising: a housing, a hydraulic motor is arranged in the housing, and the displacement of the hydraulic motor is controlled by a swash plate;

[0007] A variable control mechanism is also provided in the housing, and the variable control mechanism is used to control the movement of the swash plate to change the swing angle.

[0008] Optionally, the variable control mechanism includes a variable cylinder, a proportional valve and a feedback member;

[0009] The variable cylinder is used to control the swash plate angle;

[0010] The proportional valve is connected to the variable cylinder, and oil is supplied to the variable cylinder through the proportional valve to change the swash plate angle of the hydraulic motor; the feedback member is used to feed back the action of the variable cylinder to the proportional valve.

[0011] Optionally, the feedback member is a feedback rod, and the valve core of the proportional valve is elastically connected to the plunger rod of the variable cylinder via the feedback rod.

[0012] Optionally, a reducer is further disposed in the housing, and the reducer and the hydraulic motor are sequentially disposed in the housing along the axial direction, and a main shaft of the reducer is coaxially disposed with a motor shaft of the hydraulic motor.

[0013] Optionally, the hydraulic motor and the shaft seat of the reducer are fixedly connected via a pin shaft, and the main shaft of the reducer is indirectly connected to the motor shaft of the hydraulic motor via gears.

[0014] Optionally, the proportional valve is suitable for communicating with a control oil port on the housing, and the pressure of the control oil port is 4±0.5 MPa.

[0015] Optionally, one end of the feedback rod is fixedly connected to the plunger rod of the variable cylinder, and the other end of the feedback rod is elastically connected to the valve core of the proportional valve via an elastic member.

[0016] Optionally, a brake disc is provided in the hydraulic motor, and the brake disc is controlled by a hydraulic control valve, and oil is supplied to the brake disc through the hydraulic control valve to change the position of the brake disc.

[0017] Optionally, the hydraulic control valve is arranged in the housing, and the oil circuit inlet of the hydraulic control valve is arranged on the housing; an oil drain port is provided on the housing, and the hydraulic control valve and the brake disc are respectively connected to the oil drain port through oil pipelines; and / or the proportional valve and the swash plate are respectively connected to the oil drain port through oil pipelines.

[0018] The present invention also provides a mechanical device, comprising the integrated motor assembly described in any one of the above schemes.

[0019] The technical solution of the present invention has the following advantages:

[0020] 1. The integrated motor assembly provided by the present invention adopts a swash plate to control the displacement of the hydraulic motor. The swash plate is driven by a variable control mechanism. The variable control mechanism and the hydraulic motor are integrated inside the housing. During installation, there is no need to assemble a proportional valve separately, which can improve the convenience and economy of the installation of the hydraulic motor.

[0021] 2. In the housing of the integrated motor assembly, the present invention elastically connects the variable cylinder and the proportional valve through a feedback rod, so that the response speed of the plunger rod of the variable cylinder can be improved through the feedback rod. When the valve core of the proportional valve moves, the friction of the plunger rod in the variable cylinder can be reduced through the feedback rod, so that the control oil can drive the plunger rod more easily, thereby realizing rapid adjustment of the speed of the hydraulic motor.

[0022] 3. The integrated motor assembly provided by the present invention is provided with a brake system on the hydraulic motor. Before starting the hydraulic motor, the brake of the hydraulic motor by the brake system must be released first. During operation, the hydraulic motor can also be decelerated and braked in time through the brake system.

[0023] 4. The integrated motor assembly provided by the present invention integrates a hydraulic motor and a reducer in a shell, and the hydraulic motor is controlled by a swash plate, thereby effectively shortening the axial dimension of the equipment, saving installation space, facilitating the installation of the equipment, and having a cost advantage compared to a split motor structure.

[0024] 5. The mechanical equipment provided by the present invention includes the integrated motor assembly described in any one of the above schemes. The mechanical equipment can be a vehicle, such as a dump truck, a mixer truck, a pump truck, a car, or a construction machine, such as a roller, a paver, a milling machine, a grader, an excavator, a front loader, or a fixed device, such as a machine tool. Since the mechanical equipment includes the integrated motor assembly described in any embodiment of the present invention, it has all the beneficial effects of the integrated motor assembly described in any embodiment of the present invention, which will not be repeated here.

[0025] Additional aspects and advantages of the present invention will become apparent from the following description or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A front cross-sectional view provided in one embodiment of an integrated motor assembly of the present invention.

[0028] Figure 2 for Figure 1 The control system schematic diagram of the integrated motor assembly shown in .

[0029] Description of reference numerals:

[0030] 1. Housing; 2. Hydraulic motor; 3. Reducer; 4. Pin shaft; 5. Motor shaft; 6. Main shaft; 7. Swash plate; 8. Variable cylinder; 9. Proportional valve; 10. Plunger chamber; 11. Plunger rod; 12. Valve core; 13. Feedback rod; 14. Brake disc; 15. Hydraulic control valve; 16. Gear. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] like Figure 1As shown, this embodiment provides an integrated motor assembly, including: a housing 1, in which a hydraulic motor 2 and a reducer 3 are sequentially arranged along the axial direction, and the shaft seats of the hydraulic motor 2 and the reducer 3 are fixedly connected as a whole through a pin 4. The reducer 3 has a main shaft 6, and the main shaft 6 of the reducer 3 and the motor shaft 5 of the hydraulic motor 2 are coaxially arranged. Specifically, the motor shaft 5 of the hydraulic motor 2 and the main shaft 6 of the reducer 3 can be indirectly connected through a gear 16. Among them, the reducer 3 can be any one of a single-stage, two-stage or three-stage reducer. In addition, the motor shaft 5 of the hydraulic motor 2 and the main shaft 6 of the reducer 3 can also be connected through other coupling structures, such as a sleeve. The end of the housing 1 close to the reducer 3 is a closed structure, and the inner wall of the closed structure is used to cooperate with the reducer 3. Specifically, the end of the main shaft 6 of the reducer 3 is connected to the inner wall of the housing 1 through a ball. The inner wall of the housing 1 has a bearing platform for cooperating with the ball. The main shaft 6 of the reducer 3 is opposite to the bearing platform and is provided with a receiving groove. The ball is rotatably arranged in the receiving groove. Through the ball structure, the axial position of the main shaft 6 can be limited at the end to avoid large axial movement of the reducer 3 and improve the stability of the operation of the reducer 3.

[0036] In addition, if Figure 1 As shown, the reducer 3 is installed in the housing 1 through the hydraulic motor 2. Specifically, the shaft seat of the reducer 3 and the shaft seat of the hydraulic motor 2 are first connected as one through bolts and pin shafts 4, and the main shaft 6 of the reducer 3 and the motor shaft 5 of the hydraulic motor 2 are connected through gears 16. Then, the integrated structure is installed in the housing 1, and the main shaft 6 of the reducer 3 is placed on the bearing platform in the housing 1. Then, the hydraulic motor 2 is connected to the housing through fasteners, so that the reducer 3 is set in the housing 1. This setting method connects the reducer 3 and the hydraulic motor 2 from the outside of the housing 1, which is convenient for operation and can improve the matching accuracy of the reducer 3 and the hydraulic motor 2.

[0037] The integrated motor assembly provided in this embodiment, wherein the hydraulic motor 2 uses a swash plate 7 to control the displacement, and the variable cylinder for controlling the swash plate angle and the proportional valve for supplying oil to the variable cylinder are both arranged in the housing of the integrated motor assembly. Compared with the split structure, the integrated motor assembly provided in this embodiment not only has cost advantages, but also because the proportional valve and the variable cylinder are both arranged in the housing, the control oil pipeline can be shorter, thereby improving the speed and accuracy of the control. Specifically, the variable cylinder 8 is accommodated in the accommodating cavity formed on the shaft seat of the hydraulic motor 2, and the proportional valve 9 is arranged on the periphery of the shaft seat of the hydraulic motor 2, and can be connected to the shaft seat by means of clamping, welding or fastener fixing. This arrangement method can facilitate the maintenance of the proportional valve 9 and protect the variable cylinder 8 to avoid the influence of the working medium on the operation of the variable cylinder. In addition, on the shaft seat of the hydraulic motor 2, the accommodating cavity for arranging the variable cylinder 8 is connected to the installation position for arranging the proportional valve 9. When the proportional valve 9 is removed, the working condition of the variable cylinder 8 in the accommodating cavity can be seen, thereby maintaining the variable cylinder 8.

[0038] like Figure 2 As shown, the variable cylinder 8 has a plunger cavity 10 and a plunger rod 11, and the plunger rod 11 is rotatably connected to the swash plate 7, so as to drive the swash plate 7 to swing. The outlet of the proportional valve 9 is connected to the plunger cavity 10 of the variable cylinder 8, and the length of the plunger rod 11 extending or retracting is controlled by the proportional valve 9, so as to control the change of the inclination angle of the swash plate 7. The proportional valve 9 includes: a valve core 12 for adjustment, and the flow and direction of the control oil passing through the proportional valve 9 are adjusted by the movement of the valve core. In addition, a feedback rod 13 is also connected to the valve core 12 of the proportional valve 9, and the valve core 12 is elastically connected to the plunger rod 11 of the variable cylinder 8 through the feedback rod 13. Specifically, one end of the feedback rod 13 is fixedly connected to the plunger rod 11 of the variable cylinder 8, and the other end of the feedback rod 13 is elastically connected to the valve core 12 of the proportional valve 9 through an elastic member. By setting the feedback rod 13, when the valve core 12 of the proportional valve 9 moves, the plunger rod 11 of the variable cylinder 8 can be directly driven, and then the control speed of the swash plate can be improved by cooperating with the drive of the control oil. In addition, the valve core 12 and the plunger rod 11 are elastically connected by the feedback rod 13, which can improve the stability of the position of the valve core 12, thereby ensuring the stability of the swash plate 7 and realizing stable control of the displacement of the hydraulic motor 2.

[0039] In the housing of the integrated motor assembly of this embodiment, the proportional valve 9 can be any one of an electrically controlled proportional valve, a hydraulic displacement control proportional valve, a position feedback control proportional valve, and a force feedback control proportional valve. Among them, an electrically controlled proportional valve is preferred, and the electrically controlled proportional valve includes a proportional solenoid in the valve and a valve core 12. The electrically controlled proportional valve generates a corresponding action according to the input voltage signal, so that the valve core 12 is displaced, the valve port size changes, and thereby completes the flow output proportional to the input voltage.

[0040] In the integrated motor assembly of this embodiment, the control oil inlet of the proportional valve 9 can be communicated with the working oil inside the housing 1, and can also be communicated with the control oil outside the housing 1. Figure 2 As shown, when an open system is used, that is, the control oil of the proportional valve 9 adopts an external oil source, the pressure of the control oil applied at the control oil port Ps is close to 4 MPa, and its fluctuation range is controlled within 0.5 MPa.

[0041] As a preferred embodiment, Figure 2 As shown, the hydraulic motor of this embodiment also has a brake disc 14, and the brake disc 14 is connected to the hydraulic motor through a spring, and the position of the brake disc 14 is controlled by a hydraulic control valve 15 to brake or decelerate the hydraulic motor. Specifically, under normal circumstances, the brake disc 14 maintains contact with the motor shaft 5 of the hydraulic motor 2 under the action of the spring, thereby forming a braking state for the motor shaft 5 of the hydraulic motor 2. When oil is supplied in the direction of the brake disc 14, the position of the brake disc 14 is changed to release the braking state of the motor shaft 5 by the brake disc 14, so that the motor shaft 5 can operate. Among them, the hydraulic control valve 15 is arranged in the housing of the integrated motor assembly, and the oil circuit inlet of the hydraulic control valve 15 is arranged on the housing 1, as shown in FIG. Figure 2 The brake oil port K is shown in the figure. Before starting the hydraulic motor 2, the brake of the hydraulic motor 2 by the brake disc 14 must be released through the hydraulic control valve 15. In addition, during the operation of the hydraulic motor 2, the brake disc 14 can be controlled by the hydraulic control valve 15 to decelerate and brake the hydraulic motor 2 in time.

[0042] The working principle of the integrated motor assembly of this embodiment is as follows.

[0043] like Figure 2As shown, the proportional valve 9 generates displacement through the electronically driven valve core 12, so that the control oil enters the plunger cavity 10 of the variable cylinder 8 from the outside through the proportional valve 9; in addition, since the valve core 12 of the proportional valve 9 and the plunger rod 11 of the variable cylinder 8 are elastically connected through the feedback rod 13, the elastic force that moves the plunger rod 11 can be generated under the direct drive of the valve core 12. After the control oil enters the plunger cavity 10 of the variable cylinder 8, the plunger rod 11 is displaced under the action of the control oil, and the top end of the plunger rod 11 drives the swash plate 7 to change the inclination angle, thereby changing the flow and speed of the hydraulic motor 2. In addition, when the swing angle of the swash plate 7 is in place, the feedback rod 13 connected to the plunger rod 11 feeds back the position information to the valve core 12 through the elastic member. Under the balancing effect of the elastic force and the driving force on the valve core 12, the valve core 12 is kept in a certain position. Through the position feedback of the valve core 12, the swing angle adjustment of the swash plate 7 can be directly fed back, so that the pressure of the control oil entering the plunger chamber 10 is kept in a stable state, and finally the stable control of the swash plate 7 is achieved.

[0044] like Figure 2 As shown in , A and B are the inlet and outlet of the working oil of the hydraulic motor 2, and the working oil is used to drive the rotation of the hydraulic motor 2. T1 is an oil drain port, which is used to drain the excess working oil. Among them, the brake oil discharged from the hydraulic control valve 15 and the brake oil discharged from the brake disc 14 can both be connected to the oil drain port and discharged through the oil drain port. In addition, the control oil discharged from the proportional valve 9 and the control oil discharged from the swash plate 7 can both be connected to the oil drain port and discharged through the oil drain port.

[0045] like Figure 2 As shown, the integrated motor assembly provided in this embodiment only needs to connect five oil ports (working oil inlet A, working oil outlet B, control oil port Ps, brake oil port K and oil drain port T1) when working to complete the installation, wherein the oil drain port T1 does not need to be connected, so the on-site installation is very convenient, which is conducive to improving construction efficiency and installation quality.

[0046] On the other hand, the present invention provides a mechanical device, the mechanical device includes the integrated motor assembly described in any one of the above schemes. The mechanical device can be a vehicle, such as a dump truck, a mixer truck, a pump truck, a car, or a construction machine, such as a roller, a paver, a milling machine, a grader, an excavator, a front loader, or a fixed device, such as a machine tool. Since the mechanical device includes the integrated motor assembly described in any embodiment of the present invention, it has all the beneficial effects of the integrated motor assembly described in any embodiment of the present invention, which will not be repeated here.

[0047] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, the obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. An integrated motor assembly, characterized in that: include: A housing (1), wherein a hydraulic motor (2) is arranged in the housing (1), and the displacement of the hydraulic motor (2) is controlled by a swash plate (7); A variable control mechanism is also provided in the housing (1), the variable control mechanism is used to control the movement of the swash plate (7) to change the swing angle, the variable control mechanism comprises a variable cylinder (8), a proportional valve (9) and a feedback member, the variable cylinder (8) is used to control the swing angle of the swash plate (7), the proportional valve (9) is connected to the variable cylinder (8), and oil is supplied to the variable cylinder (8) through the proportional valve (9) to change the swing angle of the swash plate (7) of the hydraulic motor (2); The feedback member is used to feed back the action of the variable cylinder (8) to the proportional valve, and the feedback member is a feedback rod (13). The valve core (12) of the proportional valve (9) is elastically connected to the plunger rod (11) of the variable cylinder (8) via the feedback rod (13); One end of the feedback rod (13) is fixedly connected to the plunger rod (11) of the variable cylinder (8), and the other end of the feedback rod (13) is elastically connected to the valve core (12) of the proportional valve (9) via an elastic member; On the shaft seat of the hydraulic motor (2), a receiving chamber for arranging the variable cylinder (8) is communicated with a mounting position for arranging the proportional valve (9).

2. The integrated motor assembly according to claim 1, characterized in that: A reducer (3) is also arranged in the housing (1); the reducer (3) and the hydraulic motor (2) are arranged in sequence along the axial direction in the housing (1); the main shaft (6) of the reducer (3) is coaxially arranged with the motor shaft (5) of the hydraulic motor (2).

3. The integrated motor assembly according to claim 2, characterized in that: The hydraulic motor (2) and the shaft seat of the reducer (3) are fixedly connected via a pin shaft (4); the main shaft (6) of the reducer (3) and the motor shaft (5) of the hydraulic motor (2) are indirectly connected via a gear (16).

4. The integrated motor assembly according to claim 1, characterized in that: The proportional valve (9) is suitable for being connected to a control oil port on the housing (1), and the pressure of the control oil port is 4±0.5 MPa.

5. The integrated motor assembly according to any one of claims 1 to 4, characterized in that: A brake disc (14) is arranged inside the hydraulic motor (2). The brake disc (14) is controlled by a hydraulic control valve (15). Oil is supplied to the brake disc (14) through the hydraulic control valve (15) to change the position of the brake disc (14).

6. The integrated motor assembly according to claim 5, characterized in that: The hydraulic control valve (15) is arranged in the housing (1), and the oil circuit inlet of the hydraulic control valve (15) is arranged on the housing (1); The housing (1) is provided with an oil drain port; The hydraulic control valve (15) and the brake disc (14) are respectively connected to the oil drain port through oil pipelines; and / or the proportional valve (9) and the swash plate (7) are respectively connected to the oil drain port through oil pipelines.

7. A mechanical device, characterized in that: Comprising an integrated motor assembly as described in any one of claims 1-6.

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