Hydraulic motor

Abstract

The utility model discloses a hydraulic motor which comprises a motor shell, a motor main shaft is rotatably connected in the motor shell, one end of the motor main shaft is provided with a cooling shaft, the outer wall of the cooling shaft is tightly attached to the inner wall of the motor shell, and the outer wall of the cooling shaft is provided with a first annular groove, a second annular groove and a third annular groove; a first flow guide counter bore is formed in the front end of the cooling shaft and communicated with the first annular groove and the second annular groove, a first plug is arranged at an orifice of the first flow guide counter bore, a second flow guide counter bore is formed in the rear end of the cooling shaft and communicated with the first annular groove and the third annular groove, and a second plug is arranged at an orifice of the second flow guide counter bore. The motor housing is provided with a cooling liquid inlet and a cooling liquid outlet. According to the hydraulic motor, the cooling liquid inlet and the cooling liquid outlet are matched with the first annular groove, the second annular groove and the third annular groove which are communicated with one another, so that cooling liquid flowing through the cooling shaft can take away a large amount of heat, and the interior of the hydraulic motor is cooled.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic equipment, and more specifically, to a hydraulic motor. Background Art

[0002] Traditional hydraulic motors have a positive correlation between torque and size. When the required torque is met, the installed dimensions are larger, while when the required dimensions are met, the torque is insufficient. This application scenario places even more stringent requirements on the hydraulic motor, requiring it to be more adaptable to tight spaces and high torque conditions.

[0003] A compact hydraulic motor that is kept in use for a long time generates a large amount of heat. If the heat is only dissipated by an external rib plate, the heat dissipation is limited and the overall effect is poor. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a hydraulic motor which has good heat dissipation effect and can be used for a long time.

[0005] In order to solve the above technical problems, the purpose of the present invention is achieved as follows: A hydraulic motor involved in the present invention includes a motor housing, one end of the motor housing is provided with a motor front end cover, and the other end is provided with a motor rear end cover, a motor main shaft with one end extending out of the motor front end cover is rotatably connected in the motor housing, the other end of the motor main shaft is provided with a cooling shaft arranged inside the motor housing and acting as a follower, the diameter of the cooling shaft is larger than the diameter of the motor main shaft, the outer wall of the cooling shaft is tightly attached to the inner wall of the motor housing, the outer wall of the cooling shaft is provided with a first annular groove, a second annular groove and a third annular groove, the second annular groove is provided on the front side of the first annular groove, and the third annular groove is provided on the rear side of the first annular groove;

[0006] A first guide countersunk hole extending in the axial direction is formed on the front end surface of the cooling shaft, the first guide countersunk hole communicating with the first annular groove and the second annular groove, a first plug is provided at the opening of the first guide countersunk hole, and a second guide countersunk hole extending in the axial direction is formed on the rear end surface of the cooling shaft, the second guide countersunk hole communicating with the first annular groove and the third annular groove, a second plug is provided at the opening of the second guide countersunk hole;

[0007] The motor housing is provided with a coolant inlet and a coolant outlet extending in the radial direction. One end of the coolant inlet is connected to the outside world and the other end is connected to the inside of the second annular groove. One end of the coolant outlet is connected to the outside world and the other end is connected to the inside of the third annular groove.

[0008] The utility model is further configured as follows: a first sealing ring, a second sealing ring, a third sealing ring and a fourth sealing ring are provided between the motor housing and the cooling shaft, the second annular groove is provided between the first sealing ring and the second sealing ring, the first annular groove is provided between the second sealing ring and the third sealing ring, and the third annular groove is provided between the third sealing ring and the fourth sealing ring.

[0009] The utility model is further configured as follows: the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are all arranged on the cooling shaft.

[0010] The present invention is further configured such that the interval angle between the first guide countersunk hole and the second guide countersunk hole is 180°.

[0011] The utility model is further configured such that the interval angle between the coolant inlet and the coolant outlet is 180°.

[0012] The present invention is further configured such that the distance between the first annular groove and the second annular groove is equal to the distance between the first annular groove and the third annular groove.

[0013] To sum up, the utility model has the following beneficial effects: the hydraulic motor involved in the utility model, through the coolant inlet and outlet, is equipped with the first annular groove, the second annular groove and the third annular groove that are interconnected, so that the coolant flowing through the cooling shaft can take away a large amount of heat, dissipate heat inside the hydraulic motor, and ensure that the motor can be used normally and for a long time in high-speed and high-torque usage scenarios, with complete overall functions and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the preferred embodiments of the present invention are described below in conjunction with specific examples. However, it should be understood that these descriptions are only for the purpose of further illustrating the features and advantages of the present invention, and are not intended to limit the patent claims of the present invention. Based on the examples in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0016] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0017] Example 1

[0018] See also Figure 1As shown, a hydraulic motor involved in this embodiment includes a motor housing 1, one end of the motor housing 1 is provided with a motor front end cover (not shown), and the other end is provided with a motor rear end cover 2, a motor main shaft 3 with one end extending out of the motor front end cover is rotatably connected in the motor housing 1, and the other end of the motor main shaft 3 is provided with a cooling shaft 4 arranged inside the motor housing and acting as a follower, the diameter of the cooling shaft 4 is larger than the diameter of the motor main shaft 3, the outer wall of the cooling shaft 4 is tightly attached to the inner wall of the motor housing 1, and the outer wall of the cooling shaft 4 is provided with a first annular groove 5, a second annular groove 6 and a third annular groove 7, the second annular groove 6 is provided on the front side of the first annular groove 5, and the third annular groove 7 is provided on the rear side of the first annular groove 5;

[0019] A first guide countersunk hole 8 extending in the axial direction is formed on the front end surface of the cooling shaft 4. The first guide countersunk hole 8 communicates with the first annular groove 5 and the second annular groove 6. A first plug 9 is provided at the opening of the first guide countersunk hole 8. A second guide countersunk hole 10 extending in the axial direction is formed on the rear end surface of the cooling shaft 4. The second guide countersunk hole 10 communicates with the first annular groove 5 and the third annular groove 7. A second plug 11 is provided at the opening of the second guide countersunk hole 10.

[0020] The motor housing 1 is provided with a coolant inlet 12 and a coolant outlet 13 extending radially. One end of the coolant inlet 12 is connected to the outside world and the other end is connected to the inside of the second annular groove 6. One end of the coolant outlet 13 is connected to the outside world and the other end is connected to the inside of the third annular groove 7.

[0021] Furthermore, the interval angle between the first guide countersunk hole 8 and the second guide countersunk hole 10 is 180°.

[0022] Furthermore, the coolant inlet 12 and the coolant outlet 13 are spaced at an angle of 180°.

[0023] Furthermore, the distance between the first annular groove 5 and the second annular groove 6 is equal to the distance between the first annular groove 5 and the third annular groove 7 .

[0024] In this embodiment, the circulating coolant is introduced into the interior of the second annular groove 6 along the coolant inlet 12, and is guided through the first guide countersunk hole 8 to flow into the interior of the first annular groove 5. Then, it is guided through the second guide countersunk hole 10 to flow into the third annular groove 7, and finally discharged along the coolant outlet 13, taking away a large amount of heat for heat dissipation.

[0025] Example 2

[0026] See also Figure 1As shown, the hydraulic motor involved in this embodiment is further configured on the basis of Example 1, wherein a first sealing ring 14, a second sealing ring 15, a third sealing ring 16 and a fourth sealing ring 17 are provided between the motor housing 1 and the cooling shaft 4, the second annular groove is provided between the first sealing ring and the second sealing ring, the first annular groove is provided between the second sealing ring and the third sealing ring, and the third annular groove is provided between the third sealing ring and the fourth sealing ring.

[0027] Furthermore, the first sealing ring 14 , the second sealing ring 15 , the third sealing ring 16 and the fourth sealing ring 17 are all arranged on the cooling shaft 4 .

[0028] In this embodiment, the provision of the first sealing ring 14 , the second sealing ring 15 , the third sealing ring 16 and the fourth sealing ring 17 enhances the sealing.

[0029] The hydraulic motor involved in the present utility model uses a coolant inlet and outlet to match the first annular groove, the second annular groove and the third annular groove that are interconnected, so that the coolant flowing through the cooling shaft can take away a large amount of heat, dissipate heat inside the hydraulic motor, and ensure that the motor can be used normally and for a long time in high-speed and high-torque usage scenarios. The overall function is complete and the practicality is strong.

[0030] Unless otherwise specified, in the present invention, if there are terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicating orientation or positional relationship, they are based on the orientation or positional relationship actually shown and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, they can combine the embodiments and understand the specific meanings of the above terms according to specific circumstances.

[0031] Unless otherwise specified or limited, the terms "disposed," "connected," and "connected" in this utility model should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0032] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art based on the concepts of the present invention through logical analysis, reasoning, or limited experimentation based on the existing technology should be within the scope of protection defined by the claims.

Claims

1. A hydraulic motor comprising a motor housing, wherein one end of the motor housing is provided with a motor front cover and the other end is provided with a motor rear cover, and a motor main shaft having one end extending out of the motor front cover is rotatably connected to the motor housing, wherein: The other end of the motor main shaft is provided with a cooling shaft arranged inside the motor housing and acting as a follower, the diameter of the cooling shaft is larger than the diameter of the motor main shaft, the outer wall of the cooling shaft is tightly attached to the inner wall of the motor housing, and the outer wall of the cooling shaft is provided with a first annular groove, a second annular groove and a third annular groove, the second annular groove is arranged on the front side of the first annular groove, and the third annular groove is arranged on the rear side of the first annular groove; A first guide countersunk hole extending in the axial direction is formed on the front end surface of the cooling shaft, the first guide countersunk hole communicating with the first annular groove and the second annular groove, a first plug is provided at the opening of the first guide countersunk hole, and a second guide countersunk hole extending in the axial direction is formed on the rear end surface of the cooling shaft, the second guide countersunk hole communicating with the first annular groove and the third annular groove, a second plug is provided at the opening of the second guide countersunk hole; The motor housing is provided with a coolant inlet and a coolant outlet extending in the radial direction. One end of the coolant inlet is connected to the outside world and the other end is connected to the inside of the second annular groove. One end of the coolant outlet is connected to the outside world and the other end is connected to the inside of the third annular groove.

2. The hydraulic motor according to claim 1, wherein: A first sealing ring, a second sealing ring, a third sealing ring and a fourth sealing ring are provided between the motor housing and the cooling shaft, the second annular groove is provided between the first sealing ring and the second sealing ring, the first annular groove is provided between the second sealing ring and the third sealing ring, and the third annular groove is provided between the third sealing ring and the fourth sealing ring.

3. The hydraulic motor according to claim 2, characterized in that: The first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are all arranged on the cooling shaft.

4. The hydraulic motor according to any one of claims 1 to 3, characterized in that: The first guide countersunk hole and the second guide countersunk hole are spaced at an angle of 180°.

5. The hydraulic motor according to claim 4, characterized in that: The coolant inlet and the coolant outlet are spaced at an angle of 180°.

6. The hydraulic motor according to claim 1, characterized in that: The distance between the first annular groove and the second annular groove is equal to the distance between the first annular groove and the third annular groove.

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