CN220353989U - Radial plunger motor - Google Patents

Abstract

The utility model discloses a radial plunger motor, comprising: the brake device comprises a first shell, a brake ring, a piston and a plunger cylinder; the brake ring is installed in first casing, is equipped with first elastic component between brake ring's one end and the first casing, and the brake ring is located between first elastic component and the plunger jar, and the other end of brake ring sets up first braking portion, and the plunger jar is close to the one end of brake ring and is equipped with second braking portion, and the piston cover is established the other end of brake ring, forms sealed chamber between brake ring, piston and the first casing inner wall. According to the utility model, the braking can be realized through the mutual matching of the first elastic piece, the first braking part and the second braking part, so that the volume and the size of the radial plunger motor can be obviously reduced, and the motor structure is more compact.

Description

Radial plunger motor

Technical Field

The utility model relates to the technical field of motor equipment, in particular to a radial plunger motor.

Background

A hydraulic motor is an actuator in a hydraulic system for converting the hydraulic pressure provided by a hydraulic pump into mechanical energy (torque and rotational speed) of an output shaft. The inner curve hydraulic motor is a multi-function radial plunger motor, which is mainly characterized by large output torque and good low-speed stability and can be directly connected with a working mechanism.

The existing radial plunger motor is generally provided with a braking structure to realize the braking of the motor, and the conventional commonly used braking structure is that a friction plate group (generally composed of friction plates and steel plates) is arranged in the plunger motor, and the braking of a main shaft is realized by virtue of friction force. The number of friction plates and steel plates adopted by the braking structure is large, so that the overall size and the axial size of the plunger motor are large, and the plunger motor is not suitable for being applied to working conditions with small installation space.

Disclosure of Invention

The utility model aims to solve the technical problems that: the existing braking structure causes the technical problem of larger size of the plunger motor. To this end, the present utility model provides a radial plunger motor that can be downsized while realizing a braking function.

The technical scheme adopted for solving the technical problems is as follows: a radial plunger motor, comprising: the brake device comprises a first shell, a brake ring, a piston and a plunger cylinder; the brake ring is installed in the first casing, one end of the brake ring with be equipped with first elastic component between the first casing, the brake ring is located first elastic component with between the plunger jar, the other end of brake ring sets up first braking portion, the plunger jar is close to the one end of brake ring is equipped with the second braking portion, the piston cover is established the other end of brake ring, form sealed chamber between brake ring, piston and the first shells inner wall.

Further, the first braking portion comprises a plurality of first braking blocks, the plurality of first braking blocks are uniformly distributed on the end face of the braking ring, and a first clamping groove is formed between two adjacent first braking blocks.

Further, the second braking portion comprises a plurality of second braking blocks, the plurality of second braking blocks are uniformly distributed on the end face of the plunger cylinder, and a second clamping groove is formed between two adjacent second braking blocks.

Further, the method further comprises the following steps: and a positioning element for limiting rotation of the brake ring relative to the first housing.

Further, a first mounting groove is formed in the first shell, a second mounting groove is formed in one end of the brake ring, one end of the first elastic piece is located in the first mounting groove, and the other end of the first elastic piece is located in the second mounting groove.

Further, the first shell is further provided with a third mounting groove, one end of the brake ring is further provided with a fourth mounting groove, one part of the positioning element is located in the third mounting groove, and the other part of the positioning element is located in the fourth mounting groove.

Further, the method further comprises the following steps: one end of the main shaft penetrates through the first shell, and the main shaft is connected with the first shell through a bearing; and one end of the main shaft is connected with the plunger cylinder through spline fit.

Further, the method further comprises the following steps: the second shell is connected with the first shell, and a stator is further arranged between the first shell and the second shell.

Further, a flow distribution valve is arranged in the second shell, and one end face of the flow distribution valve is abutted to the plunger cylinder.

Further, a low-pressure cavity and a high-pressure cavity are formed between the outer peripheral surface of the distributing valve and the inner wall of the second shell.

Further, a second elastic piece is arranged between the right end of the distributing valve and the second shell.

Further, the main shaft is connected with the first shell through a bearing.

The utility model has the beneficial effects that the braking mode can realize braking by mutually matching the sealing cavity, the first elastic piece, the first braking part and the second braking part without arranging a friction plate group with larger volume, and the volume and the size of the radial plunger motor can be obviously reduced; the positioning element can prevent the brake ring from rotating relative to the first shell, so that the reliability of braking is improved; the two ends of the first elastic piece are respectively arranged in the first mounting groove and the second mounting groove, so that the axial size of the radial plunger motor can be further reduced, and the motor structure is more compact.

Drawings

The utility model will be further described with reference to the drawings and examples.

Fig. 1 is a schematic partial structure of a radial plunger motor of the present utility model.

Fig. 2 is a schematic structural view of the first brake portion of the present utility model.

Fig. 3 is a schematic structural view of the second brake portion of the present utility model.

Fig. 4 is a schematic view of a mounting structure of the positioning element of the present utility model.

Fig. 5 is a schematic view of a third mounting groove and a fourth mounting groove of the present utility model.

Fig. 6 is a schematic view of another mounting structure of the positioning element of the present utility model.

Fig. 7 is a schematic structural view of the brake ring of the present utility model.

Fig. 8 is a cross-sectional view of a radial plunger motor of the present utility model.

Fig. 9 is a schematic structural view of the plunger cylinder of the present utility model.

In the figure: 1. a first housing; 2. a brake ring; 3. a first elastic member; 4. a plunger cylinder; 5. a positioning element; 6. a piston; 7. sealing the cavity; 8. a main shaft; 9. a second housing; 10. a stator; 11. a flow distribution valve; 12. a low pressure chamber; 13. a high pressure chamber; 14. a bearing; 15. a second elastic member; 101. a first mounting groove; 102. a third mounting groove; 201. a second mounting groove; 202. a first braking section; 203. a fourth mounting groove; 401. a second braking section; 402. a first plunger cavity; 403. a plunger; 404. a roller; 405. a second plunger chamber; 2021. a first brake pad; 2022. a first clamping groove; 4011. a second brake pad; 4012. and a second clamping groove.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 8, the radial plunger motor of the present utility model includes: the novel brake device comprises a first shell 1, a brake ring 2, a first elastic piece 3, a piston 6 and a plunger cylinder 4, wherein the brake ring 2 is arranged in the first shell 1, the first elastic piece 3 is arranged between one end of the brake ring 2 and the first shell 1, the brake ring 2 is arranged between the first elastic piece 3 and the plunger cylinder 4, a first braking part 202 is arranged at the other end of the brake ring 2, a second braking part 401 is arranged at one end, close to the brake ring 2, of the plunger cylinder 4, the other end of the brake ring 2 is sleeved with the piston 6, and a sealing cavity 7 is formed among the brake ring 2, the piston 6 and the inner wall of the first shell 1. That is, the first elastic member 3 is located at the left end of the brake ring 2, the plunger cylinder 4 is located at the right end of the brake ring 2, the seal chamber 7 is located at the right end of the brake ring 2, and the first brake portion 202 and the second brake portion 401 are disposed opposite to each other.

It should be noted that, when the motor is running, the sealing cavity 7 is communicated with the brake release oil port, and hydraulic oil is introduced into the sealing cavity 7, at this time, the hydraulic oil can push the brake ring 2 to move leftwards, the distance between the first brake portion 202 and the second brake portion 401 gradually increases, and finally, the first brake portion and the second brake portion are released, and at this time, the plunger cylinder 4 is released. When braking is needed, the pressure oil is stopped from being introduced into the sealing cavity 7, the brake ring 2 moves rightwards under the action of the first elastic piece 3, the first braking part 202 gradually approaches the second braking part 401, and when the first braking part 202 is meshed with the second braking part 401, the braking of the plunger cylinder 4 can be realized.

The braking mode of the utility model does not need to arrange a friction plate group with larger volume, and can realize the braking of the motor through the mutual matching of the sealing cavity 7, the first elastic piece 3, the first braking part 202 and the second braking part 401, thus the volume and the size of the radial plunger motor can be obviously reduced, and the utility model is suitable for being applied to working conditions with smaller installation space.

For example, the first brake portion 202 includes a plurality of first brake pads 2021, the plurality of first brake pads 2021 are uniformly distributed on the end face of the brake ring 2, and a first clamping groove 2022 is formed between two adjacent first brake pads 2021. The second brake portion 401 includes a plurality of second brake pads 4011, the plurality of second brake pads 4011 are uniformly distributed on the end surface of the plunger cylinder 4, and a second clamping groove 4012 is formed between two adjacent second brake pads 4011. When braking is needed, the first braking part 202 moves rightwards under the thrust of the first elastic piece 3, and when the first braking block 2021 is clamped into the second clamping groove 4012 and the second braking block 4011 is clamped into the first clamping groove 2022 (i.e. the first braking part 202 and the second braking part 401 are in staggered engagement), the plunger cylinder 4 can be prevented from continuing to rotate, and braking is achieved. The braking mode is simpler in structure and smaller in occupied space.

For example, the first housing 1 is provided with a first mounting groove 101, one end of the brake ring 2 is provided with a second mounting groove 201, the second mounting groove 201 is opposite to the first mounting groove 101, one end of the first elastic member 3 is located in the first mounting groove 101, and the other end of the first elastic member 3 is located in the second mounting groove 201. The two ends of the first elastic piece 3 are respectively arranged in the first mounting groove 101 and the second mounting groove 201, so that the axial size of the radial plunger motor can be further reduced, the motor structure is more compact, the positioning of the first elastic piece 3 is facilitated, and the force direction of the first elastic piece 3 to the brake ring 2 is more stable.

For example, the radial plunger motor further includes: a positioning element 5 for limiting the rotation of the brake ring 2 relative to the first housing 1. Since the present utility model implements the braking of the plunger cylinder 4 by the staggered engagement between the first braking portion 202 and the second braking portion 401, it is necessary to ensure that the brake ring 2 does not rotate together with the plunger cylinder 4. On the one hand, as the first shell 1 is stationary, the positioning element 5 can prevent the brake ring 2 from rotating relative to the first shell 1, thereby achieving the purpose of braking and being beneficial to improving the reliability of braking; on the other hand, the brake ring 2 can slide left and right along the positioning element 5 during the braking and releasing processes, and the positioning element 5 can prevent the brake ring 2 from tilting when sliding left and right.

For example, the first housing 1 is further provided with a third mounting groove 102, one end of the brake ring 2 is further provided with a fourth mounting groove 203, a part of the positioning element 5 is located in the third mounting groove 102, and another part of the positioning element 5 is located in the fourth mounting groove 203. It should be noted that the positioning element 5 may be mounted in various manners. For example, as shown in fig. 4, the third mounting groove 102 and the fourth mounting groove 203 are disposed opposite to each other and have the same diameter, the left end of the positioning member 5 is located in the third mounting groove 102, and the right end of the positioning member 5 is located in the fourth mounting groove 203. For example, as shown in fig. 6, the diameter of the third mounting groove 102 is larger than the diameter of the fourth mounting groove 203, the upper left end and the lower end of the positioning member 5 are located in the third mounting groove 102, and the upper right end of the positioning member 5 is located in the fourth mounting groove 203.

Compared with the prior art adopting a blank surface positioning braking mode, the utility model has the advantages that after the mounting groove is arranged, the positioning of the braking ring 2 can be more accurate, the rotation angle of the braking ring 2 relative to the positioning element 5 during braking is small, the damage to the stress surface is small, the distance of the front and back movement of a motor control object during stopping can be correspondingly small, the blank surface braking is adopted, the positioning of the braking ring 2 is not accurate enough, and the distance of the front and back movement of the motor control object during stopping is still large.

The number of the first mounting grooves 101 and the third mounting grooves 102 on the brake ring 2 is plural, and the first elastic member 3 and the positioning element 5 may be disposed at intervals. The positioning element 5 is arranged at intervals with the first elastic piece 3, so that the positioning element 5 can position the first mounting groove 101, the relative positions of the first shell 1 and the elastic piece mounting groove on the brake ring 2 are accurate, and the first elastic piece 3 is prevented from being damaged; meanwhile, the first elastic piece 3 is arranged at intervals to enable the pressure of the first elastic piece on the brake ring 2 to be uniform, so that the brake ring 2 is prevented from being damaged by the positioning element 5 caused by the deflection force generated by the single-side bearing of the elastic pressure, and the service life of the brake device can be prolonged through the arrangement of the first elastic piece.

Specifically, the radial plunger motor further includes: the main shaft 8 and the second casing 9, the one end of main shaft 8 runs through first casing 1, and the one end of main shaft 8 passes through spline fit connection with plunger jar 4. The second housing 9 is connected to the first housing 1, and a stator 10 is further provided between the first housing 1 and the second housing 9. The second housing 9 is provided with a flow distribution valve 11, and one end surface of the flow distribution valve 11 abuts against the plunger cylinder 4. A low pressure chamber 12 and a high pressure chamber 13 are formed between the outer peripheral surface of the distributing valve 11 and the inner wall of the second housing 9. The main shaft 8 is rotatably connected to the first housing 1 via a bearing 14. The stator 10 may limit the moving stroke of the piston 6.

The low-pressure cavity 12 and the high-pressure cavity 13 are respectively communicated with two oil ports, oil in the high-pressure cavity 13 is distributed to the first plunger cavity 402 of the plunger cylinder 4 through the distributing valve 11, at the moment, the plunger 403 of the plunger cylinder 4 is pressed to move outwards, the roller 404 of the plunger cylinder 4 rolls along the inner curve of the stator 10 to form the rotating force of the plunger cylinder 4, the low-pressure cavity 12 is communicated with the second plunger cavity 405, the roller 404 rolls along the inner curve of the stator 10, the plunger 403 moves inwards, and hydraulic oil in the second plunger cavity 405 is discharged. The hydraulic oil continuously converts hydraulic energy into mechanical energy for the rotation of the plunger pair through the plunger pair, the plunger cylinder 4 is connected with the main shaft 8 through a spline, and the synchronous rotation of the plunger cylinder and the main shaft 8 is kept, so that the motor works.

When the motor needs to be stopped, the brake release oil port is not filled with pressure oil, and the brake ring 2 is subjected to rightward thrust by at least one first elastic piece 3, so that the first brake part 202 and the second brake part 401 are in staggered engagement, and relative rotation cannot be generated between the brake ring 2 and the plunger cylinder 4. Since the brake ring 2 is connected to the first housing 1 via the positioning element 5, it cannot rotate relative to the first housing 1, and at this time the plunger cylinder 4 cannot rotate, i.e. the spindle 8 cannot rotate, and the motor is in a braked state.

For example, a second elastic member 15 is provided between the right end of the distributing valve 11 and the second housing 9. For example, a mounting groove is formed at the right end of the distributing valve 11, and the left end of the second elastic member 15 is located in the mounting groove. The second elastic member 15 can generate a leftward pushing force so that the left end of the distributing valve 11 closely fits with the right end of the plunger cylinder 4. The second elastic member 15 has a leftward thrust force greater than the total force applied to the plunger cylinder 4 on the brake ring 2 side, so that the left end of the plunger cylinder 4 is brought into close contact with the bearing 14. Since the side of the distributing valve 11 and the side of the piston 6 are provided with the oil passages, if the distributing valve 11 is not closely attached to the plunger cylinder 4, the plunger cylinder 4 is not closely attached to the bearing 14, which may cause the motor to drain, and thus the volumetric efficiency of the motor may be reduced.

In summary, in the radial plunger motor of the present utility model, the first elastic member 3, the first braking portion 202, and the second braking portion 401 are mutually matched to realize the braking of the motor, which is beneficial to reducing the volume and size of the motor; the two ends of the first elastic member 3 are respectively arranged in the first mounting groove 101 and the second mounting groove 201, which is beneficial to further reducing the axial size of the motor, and the positioning element 5 can prevent the brake ring 2 from rotating relative to the first shell 1, so that the reliability of braking is improved. The utility model has compact structure and small volume, and is suitable for the working condition with smaller installation space.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined as the scope of the claims.

Claims (11)

1. A radial plunger motor, comprising:

a first housing (1), a brake ring (2), a piston (6) and a plunger cylinder (4);

the novel brake device is characterized in that the brake ring (2) is arranged in the first shell (1), a first elastic piece (3) is arranged between one end of the brake ring (2) and the first shell (1), the brake ring (2) is arranged between the first elastic piece (3) and the plunger cylinder (4), a first brake part (202) is arranged at the other end of the brake ring (2), a second brake part (401) is arranged at one end, close to the brake ring (2), of the plunger cylinder (4), and a sealing cavity (7) is formed among the other end of the brake ring (2), the piston (6) and the inner wall of the first shell (1) in a sleeved mode.

2. The radial piston motor according to claim 1, wherein the first braking portion (202) comprises a plurality of first braking blocks (2021), the plurality of first braking blocks (2021) being uniformly distributed on the end face of the braking ring (2), and a first clamping groove (2022) being formed between two adjacent first braking blocks (2021).

3. The radial plunger motor according to claim 2, wherein the second braking portion (401) comprises a plurality of second braking blocks (4011), the plurality of second braking blocks (4011) are uniformly distributed on the end surface of the plunger cylinder (4), and a second clamping groove (4012) is formed between two adjacent second braking blocks (4011).

4. The radial plunger motor as set forth in claim 1, further comprising: a positioning element (5) for limiting the rotation of the brake ring (2) relative to the first housing (1).

5. The radial plunger motor according to claim 1, wherein the first housing (1) is provided with a first mounting groove (101), one end of the brake ring (2) is provided with a second mounting groove (201), one end of the first elastic member (3) is located in the first mounting groove (101), and the other end of the first elastic member (3) is located in the second mounting groove (201).

6. Radial piston motor according to claim 4, wherein the first housing (1) is further provided with a third mounting groove (102), wherein one end of the brake ring (2) is further provided with a fourth mounting groove (203), wherein a part of the positioning element (5) is located in the third mounting groove (102), and wherein another part of the positioning element (5) is located in the fourth mounting groove (203).

7. The radial plunger motor as set forth in claim 1, further comprising: a main shaft (8), wherein one end of the main shaft (8) penetrates through the first shell (1), and the main shaft (8) is connected with the first shell (1) through a bearing (14); and one end of the main shaft (8) is connected with the plunger cylinder (4) through spline fit.

8. The radial plunger motor as set forth in claim 1, further comprising: the second shell (9), second shell (9) with first casing (1) is connected, still be equipped with stator (10) between first casing (1) and second shell (9).

9. Radial piston motor according to claim 8, characterized in that a flow distribution valve (11) is provided in the second housing (9), an end surface of the flow distribution valve (11) being in abutment with the piston cylinder (4).

10. Radial piston motor according to claim 9, characterized in that a low pressure chamber (12) and a high pressure chamber (13) are formed between the outer circumferential surface of the distribution valve (11) and the inner wall of the second housing (9).

11. Radial piston motor according to claim 9, characterized in that a second elastic element (15) is provided between the right end of the distribution valve (11) and the second housing (9).