Normally closed hydraulic motor with built-in brake cycloid

Abstract

The utility model discloses a normally closed type built-in brake cycloid hydraulic motor, which relates to the technical field of cycloid hydraulic motors, and comprises a linkage shaft, a brake seat is arranged outside the rear end of the linkage shaft, the rear side of the brake seat is connected with a brake shell, the rear side of the brake shell is connected with a rear cover, and the rear cover is connected with a motor. A piston is slidably connected into the brake shell, a spring is jointly connected between the piston and the side face of the rear cover, a rear steel sheet is connected to the position, located in the brake base, of the front end of the piston, and a plurality of sets of front steel sheets are connected to the outer surface of the rear end of the linkage shaft. Compared with a traditional structure, the structure has the advantages that the multiple sets of brake pads make contact with the multiple sets of front steel sheets, the brake area is increased, and therefore instant brake is achieved; and direct contact between the piston and the transmission shaft is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cycloid hydraulic motors, in particular to a normally closed built-in brake cycloid hydraulic motor. Background Art

[0002] Cycloid hydraulic motor is a device that converts hydraulic energy into mechanical energy. Due to its simple structure, wide speed range and high torque, it is widely used in engineering machinery, agricultural machinery, fishery machinery and other fields.

[0003] After searching, a cycloidal hydraulic motor with integrated built-in shuttle valve and non-plate self-locking is disclosed (publication number: CN209671132U). In this patent, the braking effect is achieved by the interference between the eccentric extended transmission shaft and the inner hole of the brake piston. However, the contact area between the transmission shaft and the inner hole of the brake piston is limited, and it is difficult to achieve the effect of instantaneous braking. In addition, when braking, the transmission shaft will squeeze the brake piston, affecting the sealing effect of the piston and the cylinder. For this reason, we propose a normally closed built-in brake cycloidal hydraulic motor. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a normally closed cycloid hydraulic motor with built-in brake, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a normally closed internal brake cycloidal hydraulic motor, comprising a linkage shaft, a brake seat is arranged on the outside of the rear end of the linkage shaft, a brake housing is connected to the rear side of the brake seat, a rear cover is connected to the rear side of the brake housing, a piston is slidably connected to the inside of the brake housing, a spring is commonly connected between the piston and the side of the rear cover, a rear steel plate is connected to the front end of the piston and located inside the brake seat, multiple groups of front steel plates are connected to the outer surface of the rear end of the linkage shaft, brake plates are connected between two adjacent groups of the front steel plates, and the edges of the multiple groups of brake plates are connected to the front end of the rear steel plate, a flow channel is opened on the top of the brake housing, and the brake seat and the inner cavity of the brake housing form a connecting structure through the flow channel, and a valve seat is installed on the top of the brake housing and located inside the flow channel.

[0006] As a further technical solution of the utility model, a rotor-stator pair is arranged outside the middle section of the linkage shaft, the front side of the rotor-stator pair is connected to a partition plate, the front side of the partition plate is connected to a body shell, and the front side of the body shell is connected to a front cover.

[0007] As a further technical solution of the utility model, the edges of the body shell, the spacer, the rotor-stator pair, the brake seat, the brake housing and the rear cover are fixedly connected by bolts, and the edges of the front cover and the body shell are fixedly connected by bolts.

[0008] As a further technical solution of the utility model, an output shaft is rotatably connected inside the body shell and the front cover via a bearing, and the rear end of the output shaft is connected to the front end of the linkage shaft.

[0009] As a further technical solution of the utility model, an oil inlet and an oil outlet are arranged on the top of the body shell, and an oil outlet one-way valve connected to the oil outlet is installed on the top of the body shell.

[0010] Beneficial Effects

[0011] The utility model provides a normally closed internal brake cycloid hydraulic motor. Compared with the prior art, it has the following beneficial effects:

[0012] 1. A normally closed built-in brake cycloidal hydraulic motor, by stopping the input of oil, the spring stretches to push the piston, rear steel plate and multiple sets of brake plates to move forward, then the multiple sets of brake plates contact with multiple sets of front steel plates to generate friction, so that the output shaft is quickly braked. Compared with the traditional structure, this structure has multiple sets of brake plates in contact with multiple sets of front steel plates, which increases the braking area, thereby achieving instant braking and avoiding direct contact between the piston and the drive shaft.

[0013] 2. A normally closed cycloidal hydraulic motor with built-in brake pushes the piston, rear steel plate and multiple sets of brake plates forward by extending the spring. The multiple sets of brake plates contact the multiple sets of front steel plates to generate friction, so that the motor is in a normally closed locking structure before and after use. This structure can keep the motor in a locked state when not in use, preventing the output shaft from connecting the device to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view of a normally closed internal brake cycloid hydraulic motor;

[0015] Figure 2 A cross-sectional view of a normally closed, internally braked cycloidal hydraulic motor.

[0016] In the figure: 1. linkage shaft; 2. brake seat; 3. brake housing; 4. rear cover; 5. piston; 6. spring; 7. rear steel plate; 8. front steel plate; 9. brake pad; 10. flow channel; 11. valve seat; 12. rotor-stator pair; 13. partition plate; 14. body shell; 15. front cover; 16. output shaft; 17. oil inlet; 18. oil outlet; 20. oil outlet check valve. DETAILED DESCRIPTION

[0017] 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.

[0018] See also Figure 1-2 The utility model provides a technical solution for a normally closed built-in brake cycloidal hydraulic motor: a normally closed built-in brake cycloidal hydraulic motor, comprising a linkage shaft 1, a brake seat 2 is arranged on the outside of the rear end of the linkage shaft 1, a brake housing 3 is connected to the rear side of the brake seat 2, a rear cover 4 is connected to the rear side of the brake housing 3, a piston 5 is slidably connected to the inside of the brake housing 3, a spring 6 is commonly connected between the piston 5 and the side of the rear cover 4, a rear steel plate 7 is connected to the front end of the piston 5 and is located inside the brake seat 2, a plurality of groups of front steel plates 8 are connected to the outer surface of the rear end of the linkage shaft 1, brake plates 9 are connected between two adjacent groups of front steel plates 8, and the edges of the plurality of groups of brake plates 9 are connected to the front end of the rear steel plate 7, a flow channel 10 is opened on the top of the brake housing 3, and the inner cavity of the brake seat 2 and the brake housing 3 is connected through the flow channel 10 The valve seat 11 is installed on the top of the brake housing 3 and inside the flow channel 10, and a rotor-stator pair 12 is arranged outside the middle section of the linkage shaft 1, and a spacer 13 is connected to the front side of the rotor-stator pair 12, and the front side of the spacer 13 is connected to the body shell 14, and the front side of the body shell 14 is connected to the front cover 15. The edges of the body shell 14, the spacer 13, the rotor-stator pair 12, the brake seat 2, the brake housing 3 and the rear cover 4 are fixedly connected by bolts, and the edges of the front cover 15 and the body shell 14 are fixedly connected by bolts. The body shell 14 and the front cover 15 are rotatably connected with an output shaft 16 inside through a bearing, and the rear end of the output shaft 16 is connected to the front end of the linkage shaft 1, and an oil inlet 17 and an oil outlet 18 are arranged on the top of the body shell 14, and an oil outlet check valve 20 connected to the oil outlet 18 is installed on the top of the body shell 14.

[0019] It should be noted that the front and rear ends of the output shaft 16 are both provided with flow distribution grooves, and the front flow distribution groove is connected to the oil inlet 17, and the rear flow distribution groove is connected to the oil outlet 18. The top and bottom of the partition plate 13 are respectively provided with oil holes, and the lower oil hole is connected to the oil port, and the upper oil hole is connected to the oil outlet 18.

[0020] The edges of the body shell 14, the spacer 13, the rotor-stator pair 12, the brake seat 2, the brake housing 3 and the rear cover 4 are fixedly connected by bolts, and the edges of the front cover 15 and the body shell 14 are fixedly connected by bolts. This structure facilitates the assembly of the motor housing.

[0021] The working principle of the utility model is as follows: when in use, in the normal state of the motor, the spring 6 stretches to push the piston 5, the rear steel plate 7 and the multiple sets of brake plates 9 to move forward, and the multiple sets of brake plates 9 contact and generate friction with the multiple sets of front steel plates 8, so that the motor is in a normally closed locking structure;

[0022] Before the motor is used, the oil continuously flows from the oil inlet 17 of the body shell 14 to the distribution groove in front of the output shaft 16, and then to the rotor-stator pair 12 through the oil hole under the partition plate 13. Part of the oil enters the inner cavity of the brake housing 3 through the flow channel 10, so that the oil pushes the piston 5 to move backward and squeezes the spring 6. At the same time, the rear steel plate 7 and the multiple groups of brake plates 9 move backward, and the multiple groups of brake plates 9 release the friction with the multiple groups of front steel plates 8, so that the motor is in a normal working state. Part of the oil flows from the rotor-stator pair 12 to the oil hole on the partition plate 13, and then to the distribution groove behind the output shaft 16, through the oil outlet check valve 20, and is continuously discharged to the oil outlet 18 of the body shell 14;

[0023] When the motor stops working and the output shaft 16 is braked quickly, the oil input is stopped, and the spring 6 stretches to push the piston 5, the rear steel plate 7 and the multiple groups of brake pads 9 to move forward. The multiple groups of brake pads 9 contact the multiple groups of front steel plates 8 to generate friction, so that the output shaft 16 is braked quickly.

Claims

1. A normally closed internal brake cycloid hydraulic motor, characterized in that: The invention comprises a linkage shaft (1), a brake seat (2) is arranged outside the rear end of the linkage shaft (1), a brake housing (3) is connected to the rear side of the brake housing (2), a rear cover (4) is connected to the rear side of the brake housing (3), a piston (5) is slidably connected inside the brake housing (3), a spring (6) is commonly connected between the side surfaces of the piston (5) and the rear cover (4), a rear steel plate (7) is connected to the front end of the piston (5) and located inside the brake seat (2), and the linkage shaft (1) is provided with a brake seat (2) and a brake housing (3) is connected to the rear side of the brake housing (3). The rear end outer surface of the moving shaft (1) is connected to a plurality of front steel plates (8), and brake plates (9) are connected between two adjacent groups of the front steel plates (8), and the edges of the plurality of brake plates (9) are connected to the front end of the rear steel plate (7). A flow channel (10) is provided at the top of the brake housing (3), and the inner cavities of the brake seat (2) and the brake housing (3) form a connecting structure through the flow channel (10), and a valve seat (11) is installed at the top of the brake housing (3) and inside the flow channel (10).

2. A normally closed internal brake cycloid hydraulic motor according to claim 1, characterized in that: A rotor-stator pair (12) is arranged outside the middle section of the linkage shaft (1), the front side of the rotor-stator pair (12) is connected to a partition plate (13), the front side of the partition plate (13) is connected to a body shell (14), and the front side of the body shell (14) is connected to a front cover (15).

3. A normally closed internal brake cycloid hydraulic motor according to claim 2, characterized in that: The edges of the body shell (14), the spacer (13), the rotor-stator pair (12), the brake seat (2), the brake housing (3) and the rear cover (4) are fixedly connected by bolts, and the edges of the front cover (15) and the body shell (14) are fixedly connected by bolts.

4. A normally closed internal brake cycloid hydraulic motor according to claim 2, characterized in that: An output shaft (16) is rotatably connected inside the body shell (14) and the front cover (15) via a bearing, and the rear end of the output shaft (16) is connected to the front end of the linkage shaft (1).

5. A normally closed internal brake cycloid hydraulic motor according to claim 2, characterized in that: An oil inlet (17) and an oil outlet (18) are provided on the top of the body shell (14), and an oil outlet one-way valve (20) connected to the oil outlet (18) is installed on the top of the body shell (14).

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