Dual-purpose hydraulic motor capable of being used for hollow output shaft of special equipment

Abstract

The dual-purpose hydraulic motor comprises a stator, a rotor assembly, a motor front cover and a motor rear cover, the rotor assembly is connected with the output shaft, the output shaft is of a hollow structure, the inner wall of the output shaft surrounds to form a channel for an object to penetrate through, the output shaft comprises a front shaft and a rear shaft, and the front shaft and the rear shaft are connected with the rotor assembly. The front shaft and the rear shaft are arranged in a separable mode, the motor rear cover, the stator, the rotor assembly and the rear shaft form a driving assembly, the motor front cover and the front shaft form a transmission assembly, and the driving assembly and the transmission assembly are arranged in a separable mode. In the first use state, the driving assembly and the transmission assembly are used after being assembled and folded; according to the second use state, the driving assembly and the transmission assembly are separated, and the driving assembly is independently matched with an external component for use, and the transmission device has the advantages that on the basis that a hollow structure is additionally arranged on each output shaft, the driving assembly and the transmission assembly can be arranged in a separable mode according to needs, and different application scenes of a combined state and a separated state are achieved.

Description

Technical Field

[0001] The invention relates to the field of hydraulic motors, in particular to a dual-purpose hydraulic motor with a hollow output shaft which can be used for special equipment. Background Art

[0002] In the field of industrial equipment, hydraulic motors are widely used in many scenarios as an extremely important power supply device. They are usually composed of core components such as stator, rotor assembly, motor front cover and motor rear cover. The rotor assembly is connected to the output shaft, which passes through the motor front cover to achieve connection with external equipment, and a distribution shaft is set in the motor rear cover to coordinate the operation of various components to ensure that hydraulic energy is effectively converted into mechanical energy and output power.

[0003] However, in some specific special equipment application scenarios, the limitations of the existing hydraulic motor structure have been exposed. Taking the cable reel as an example, under current technical conditions, in order to achieve the design goal of reducing the overall volume of the cable reel, it is expected that the cables can be directly passed through the hydraulic motor for layout. Unfortunately, the traditional hydraulic motor structure design is extremely compact, and the internal space is tightly filled with various components, and there is no channel for the cables to pass smoothly. This structural characteristic makes it difficult for traditional hydraulic motors to meet the needs in applications that require both equipment miniaturization and special cable layout, which seriously limits its effective application range in this type of special equipment field.

[0004] With the continuous development and progress of industrial technology, special equipment has increasingly higher requirements for the compactness and multifunctional integration of the overall structure of the equipment. Especially in some working environments with limited space and requiring flexible cable layout, such as underwater equipment cable retracting devices in marine engineering, cable winding systems for mobile working platforms, etc., the existing hydraulic motor structure has become a key bottleneck restricting equipment innovation and performance improvement. Therefore, it is urgent to innovatively design and improve the structure of hydraulic motors to break through the existing technical difficulties and expand the application possibilities of hydraulic motors in the field of special equipment and other related industries, so as to better adapt to the diversified and increasingly stringent use needs of modern industry. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a dual-purpose hydraulic motor with a hollow output shaft that can be used for special equipment. The output shaft of the hydraulic motor is hollow in the present invention, and the cables of the special equipment can pass through the output shaft. On the one hand, the weight of the hydraulic motor is reduced, and on the other hand, a special function for the cables to pass through is added to meet the needs of special equipment.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a dual-purpose hydraulic motor with a hollow output shaft that can be used for special equipment, comprising a stator, a rotor assembly, a motor front cover and a motor rear cover, wherein the rotor assembly is connected to the output shaft, a distribution shaft is arranged in the motor rear cover, the output shaft transversely penetrates the motor front cover and the motor rear cover, the front end and the rear end of the output shaft are both connected to the outside world, the output shaft is a hollow structure, the inner wall of the output shaft is surrounded by a channel for objects to pass through, the output shaft comprises a front shaft and a rear shaft, the front shaft and the rear shaft are detachably arranged, and a distribution shaft is sleeved in the middle of the rear shaft The front part of the rear axle is sleeved with a rotor assembly, and the rear part of the rear axle is sleeved with a rear cover plate; the rotor assembly is connected to the front part of the rear axle and drives the rear axle to rotate, the rotor assembly is connected to the rear end of the front axle, the front axle rotates and rotates synchronously with the rear axle; the motor rear cover, stator, rotor assembly and rear axle constitute a drive assembly, the motor front cover and front axle constitute a transmission assembly, and the drive assembly and the transmission assembly can be arranged detachably; the first use state: the drive assembly and the transmission assembly are assembled and used; the second use state: the drive assembly and the transmission assembly are separated, and the drive assembly is adapted to external components for use alone.

[0007] A further preselected solution of the present invention is that the inner wall is cylindrical.

[0008] A further preselected solution of the present invention is: the rotor assembly includes a plunger and a rotor, and the rotor and the front shaft are connected via a flange.

[0009] A further preselected solution of the present invention is that a concave cavity is arranged on the side wall on the front side of the rotor, the side wall portion of the front shaft facing the rotor is in contact with the side wall of the rotor and is partially separated by the concave cavity, and the front shaft and the rear shaft are not in contact and are separated by the concave cavity.

[0010] A further preselected solution of the present invention is that a first sealing assembly is provided on the side wall where the front shaft and the rotor are in contact.

[0011] A further preselected solution of the present invention is that the rear axle and the rotor are connected by a pin, and a second sealing assembly is provided between the rear axle and the rotor.

[0012] A further preselected solution of the present invention is that the front cover, stator and rear cover are connected by screws, a third sealing component is arranged between the stator and the front cover, and a fourth sealing component is arranged between the stator and the rear cover.

[0013] A further preselected scheme of the present invention is: a first tapered roller bearing and a second tapered roller bearing are arranged between the front axle and the front cover, a first skeleton oil seal and a fifth sealing assembly are arranged between the first tapered roller bearing and the second tapered roller bearing, and a second skeleton oil seal is arranged on the front side of the first tapered roller bearing.

[0014] A further preselected solution of the present invention is that the cross-sections of the first skeleton oil seal and the second skeleton oil seal are U-shaped.

[0015] A further preselected solution of the present invention is: a bearing is arranged between the rear cover plate and the rear axle, a sixth sealing assembly and a third skeleton oil seal are arranged on the rear side of the bearing, and a seventh sealing assembly is arranged between the rear cover plate and the rear cover.

[0016] Compared with the prior art, the output shaft of the hydraulic motor of the present invention adopts a hollow setting, and the cables of special equipment can pass through the output shaft. The output shaft adopts a detachable design of the front axle and the rear axle. The motor rear cover, stator, rotor assembly and rear axle constitute the drive assembly, and the motor front cover and front axle constitute the transmission assembly. The drive assembly and the transmission assembly are detachably arranged. When in normal use, the drive assembly and the transmission assembly are normally assembled together to form a hydraulic motor through which cables can pass. At this time, the hydraulic motor reduces the weight of the hydraulic motor on the one hand, and adds a special function for the cables to pass through on the other hand, meeting the needs of special equipment. When disassembled for use, only the drive assembly is used, because the drive assembly already has the core components of the hydraulic motor, and can be connected to the external structure and used directly as a drive component. The dual-purpose characteristics of the hydraulic motor increase the application range of the hydraulic motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the hydraulic motor of the present invention; Figure 2 for Figure 1 The enlarged view of point A in the middle; Figure 3 Schematic diagram of the front axle and the rear axle; Figure 4 Schematic diagram of the hydraulic motor housing.

[0018] Reference numerals: Stator 1; rotor assembly 2; motor front cover 3; motor rear cover 4; output shaft 5; distribution shaft 6; channel 7; front shaft 8; rear shaft 9; rear cover plate 10; rotor 11; cavity 12; first sealing assembly 13; second sealing assembly 14; screw 15; third sealing assembly 16; fourth sealing assembly 17; first tapered roller bearing 18; second tapered roller bearing 19; first skeleton oil seal 20; fifth sealing assembly 21; second skeleton oil seal 22; bearing 23; sixth sealing assembly 24; third skeleton oil seal 25; seventh sealing assembly 26. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below with reference to the accompanying drawings.

[0020] A dual-purpose hydraulic motor with a hollow output shaft 5 that can be used for special equipment comprises a stator 1, a rotor assembly 2, a motor front cover 3 and a motor rear cover 4, wherein the rotor assembly 2 is connected to the output shaft 5, a distribution shaft 6 is arranged in the motor rear cover 4, the output shaft 5 transversely penetrates the motor front cover 3 and the motor rear cover 4, the front end and the rear end of the output shaft 5 are both connected to the outside, the output shaft 5 is a hollow structure, and the inner wall of the output shaft 5 forms a channel 7 for objects to pass through, wherein the objects here can be long strip components such as cables or water pipes of special equipment.

[0021] The output shaft 5 includes a front shaft 8 and a rear shaft 9, which are detachable. A distribution shaft 6 is sleeved in the middle of the rear shaft 9, a rotor assembly 2 is sleeved in the front of the rear shaft 9, and a rear cover plate 10 is sleeved in the rear of the rear shaft 9; the rotor assembly 2 is connected to the front of the rear shaft 9 and drives the rear shaft 9 to rotate, and the rotor assembly is connected to the rear end of the front shaft 8, and the front shaft 8 rotates and rotates synchronously with the rear shaft 9; the motor rear cover 4, the stator 1, the rotor assembly 2 and the rear shaft 9 constitute a drive assembly, which is the main structure inside the hydraulic motor and has the function of driving the rear shaft 9 to rotate. The motor front cover 3 and the front shaft 8 constitute a transmission assembly, which is an auxiliary component of the hydraulic motor, and its function is to form the hydraulic motor into a complete device so that the hydraulic motor outputs power to the outside through the output shaft 5. The drive assembly and the transmission assembly are detachably arranged; the first use state: the drive assembly and the transmission assembly are assembled and used to form a hollow hydraulic motor in the output shaft 5, and the cable passes through the output shaft 5. The second use state: the drive assembly and the transmission assembly are separated, and the drive assembly is used alone with external components. The external component can be the attachment surface of the component to be driven. After the drive assembly is installed in the attachment surface, it can drive the external component to rotate, and it also has the characteristic of the output shaft 5 being hollow, so that it can pass through strip objects such as cables. Both use modes reduce the weight of the hydraulic motor on the one hand, and on the other hand, add a special function for the cable to pass through, which meets the needs of special equipment and provides different application scenarios in the two use states.

[0022] The inner wall is cylindrical, and the output shaft 5 is generally also cylindrical, and the two are adapted to each other. The rotor assembly includes a plunger and a rotor, and the rotor 11 and the front shaft 8 are connected by a flange. The conventional segmented output shaft 5 generally adopts a spline fit, but the output shaft 5 of the present invention has a hollow structure, which is difficult to adopt a spline fit, so a method of fixing the rotor and the front shaft 8 by flange connection has been developed. Subsequent maintenance is convenient and the service life is long. When repairing, you only need to replace the screws and spring washers. Conventional motors use spline fit, which is difficult to repair. When the spline is worn, the motor noise becomes louder and the drive shaft needs to be replaced, which is costly.

[0023] A concave cavity 12 is provided on the side wall of the front side of the rotor 11, and the side wall portion of the front shaft 8 facing the rotor 11 is in contact with the side wall of the rotor 11, and is partially separated by the concave cavity 12. This avoids large-area contact between the rotor and the front shaft 8, and reduces the difficulty of processing the flatness of the side wall. The front shaft 8 and the rear shaft 9 do not contact and are separated by the concave cavity 12, so that the front shaft 8 and the rear shaft 9 do not collide with each other due to manufacturing tolerances.

[0024] The sealing components all adopt the structure of sealing groove, O-ring and Gley ring. A first sealing component 13 is arranged on the side wall where the front shaft 8 and the rotor 11 are in contact. Prevent hydraulic oil from entering the hollow cavity inside the output shaft 5. The rear shaft 9 and the rotor 11 are connected by pins, and a second sealing component 14 is arranged between the rear shaft 9 and the rotor. Prevent hydraulic oil from entering the hollow cavity inside the output shaft 5. The motor front cover 3, the stator 1 and the motor rear cover 4 are connected by screws 15, a third sealing component 16 is arranged between the stator 1 and the front cover, and a fourth sealing component 17 is arranged between the stator 1 and the motor rear cover 4. Prevent hydraulic oil from leaking to the outside. A first tapered roller bearing 18 and a second tapered roller bearing 19 are arranged between the front shaft 8 and the motor front cover 3, a first skeleton oil seal 20 and a fifth sealing component 21 are arranged between the first tapered roller bearing 18 and the second tapered roller bearing 19, and a second skeleton oil seal 22 is arranged on the front side of the first tapered roller bearing 18. The double sealing structure prevents the hydraulic oil from flowing out to the outside. The cross-section of the first skeleton oil seal 20 and the second skeleton oil seal 22 is U-shaped to enhance the sealing effect. A bearing 23 is arranged between the rear cover plate 10 and the rear axle 9, and a sixth sealing assembly 24 and a third skeleton oil seal 25 are arranged on the rear side of the bearing 23. A seventh sealing assembly 26 is arranged between the rear cover plate 10 and the motor rear cover 4 to prevent the hydraulic oil from flowing out to the outside.

[0025] The above is a detailed introduction to a dual-purpose hydraulic motor with a hollow output shaft that can be used for special equipment provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A dual-purpose hydraulic motor with a hollow output shaft that can be used for special equipment, comprising a stator, a rotor assembly, a motor front cover and a motor rear cover, wherein the rotor assembly is connected to the output shaft, and a distribution shaft is arranged in the motor rear cover, characterized in that: The output shaft transversely penetrates the motor front cover and the motor rear cover, the front end and the rear end of the output shaft are both connected to the outside world, the output shaft is a hollow structure, the inner wall of the output shaft is surrounded by a passage for objects to pass through, the output shaft includes a front shaft and a rear shaft, the front shaft and the rear shaft are detachably arranged, the middle part of the rear shaft is sleeved with a distribution shaft, the front part of the rear shaft is sleeved with the rotor assembly, and the rear part of the rear shaft is sleeved with a rear cover plate; the rotor assembly is connected to the front part of the rear shaft and drives the rear shaft to rotate, the rotor assembly is connected to the rear end of the front shaft, the front shaft rotates and rotates synchronously with the rear shaft; the motor rear cover, stator, rotor assembly and rear shaft constitute a drive assembly, the motor front cover and the front shaft constitute a transmission assembly, and the drive assembly and the transmission assembly are detachably arranged; the first use state: the drive assembly and the transmission assembly are assembled and used; the second use state: the drive assembly and the transmission assembly are separated, and the drive assembly is used alone with external components.

2. A dual-purpose hydraulic motor with a hollow output shaft that can be used for special equipment according to claim 1, characterized in that: The inner wall is cylindrical.

3. A dual-purpose hydraulic motor with a hollow output shaft that can be used for special equipment according to claim 1, characterized in that: The rotor assembly comprises a plunger and a rotor, and the rotor is connected to the front shaft via a flange.

4. A dual-purpose hydraulic motor with a hollow output shaft that can be used for special equipment according to claim 1, characterized in that: A concave cavity is arranged on the side wall of the front side of the rotor, and the front shaft faces the side wall of the rotor, partially fits with the side wall of the rotor and is partially separated by the concave cavity; the front shaft and the rear shaft are not in contact and are separated by the concave cavity.

5. A dual-purpose hydraulic motor with a hollow output shaft that can be used for special equipment according to claim 4, characterized in that: A first sealing assembly is arranged on the side wall where the front shaft and the rotor are in contact.

6. A dual-purpose hydraulic motor with a hollow output shaft that can be used for special equipment according to claim 1, characterized in that: The rear axle and the rotor are connected via a pin, and a second sealing assembly is arranged between the rear axle and the rotor.

7. A dual-purpose hydraulic motor with a hollow output shaft that can be used for special equipment according to claim 1, characterized in that: The motor front cover, the stator and the motor rear cover are connected by screws, a third sealing component is arranged between the stator and the motor front cover, and a fourth sealing component is arranged between the stator and the motor rear cover.

8. A dual-purpose hydraulic motor with a hollow output shaft that can be used for special equipment according to claim 1, characterized in that: A first tapered roller bearing and a second tapered roller bearing are arranged between the front axle and the motor front cover, a first skeleton oil seal and a fifth sealing assembly are arranged between the first tapered roller bearing and the second tapered roller bearing, and a second skeleton oil seal is arranged on the front side of the first tapered roller bearing.

9. A dual-purpose hydraulic motor with a hollow output shaft that can be used for special equipment according to claim 8, characterized in that: The cross sections of the first skeleton oil seal and the second skeleton oil seal are U-shaped.

10. A dual-purpose hydraulic motor with a hollow output shaft that can be used for special equipment according to claim 1, characterized in that: A bearing is arranged between the rear cover plate and the rear axle, a sixth sealing assembly and a third skeleton oil seal are arranged on the rear side of the bearing, and a seventh sealing assembly is arranged between the rear cover plate and the motor rear cover.

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