CN214698159U

CN214698159U - High-speed and high-back-pressure-resistant gear motor

Info

Publication number: CN214698159U
Application number: CN202120872404.5U
Authority: CN
Inventors: 许可; 邓玉; 王少洋
Original assignee: Hefei Changyuan Hydraulics Co Ltd
Current assignee: Hefei Changyuan Hydraulics Co Ltd
Priority date: 2021-04-26
Filing date: 2021-04-26
Publication date: 2021-11-12
Anticipated expiration: 2031-04-26

Abstract

The utility model discloses a high-speed high-backpressure-resistant gear motor, which comprises a front cover, a shell, a transmission gear and a rear cover, wherein the front cover is in a cylindrical shape, a cylindrical surface of the front cover is provided with a planar groove, the planar groove is provided with an oil inlet and an oil outlet, and the front cover is internally provided with a high-pressure oil cavity channel and a low-pressure oil cavity channel; the high-pressure oil cavity channel is communicated with the oil inlet, and the low-pressure oil cavity channel is communicated with the oil outlet; the central axis of the oil inlet is parallel to the central axis of the oil outlet and is perpendicular to the plane of the plane groove. The gear motor is cylindrical in shape, the volume of the shape is more round and compact, the oil inlet and the oil outlet are integrated on the same plane and are directly communicated with the high pressure and the low pressure of the motor respectively, the oil inlet and the oil outlet are more compact, and the problems that the conventional gear motor is large in occupied size, not compact in structure and overlarge in distribution of the oil outlets are solved.

Description

High-speed and high-back-pressure-resistant gear motor

Technical Field

The utility model relates to a gear motor field, concretely relates to resistant gear motor of high back pressure of high rotational speed.

Background

The gear motor generally refers to a gear hydraulic motor, and due to poor sealing performance and low volumetric efficiency, the input oil pressure cannot be too high, and large torque cannot be generated. And the instantaneous rotating speed and the torque change along with the position change of the meshing point, so the gear hydraulic motor is only suitable for the occasions of high speed and small torque. The torque converter is generally used for engineering machinery, agricultural machinery and mechanical equipment with low requirement on torque uniformity.

As shown in figure 1, a conventional gear motor in the prior art has a spigot, a mounting hole and an irregular shape, and adopts a threaded oil port or a flange oil port, and has the defects of large occupied volume, non-compact shape structure and overlarge oil port distribution in mounting.

In addition, as shown in fig. 2 to 3, in the conventional gear motor in the prior art, the sealing seat is mostly sealed by the conventional rotating shaft lip-shaped sealing ring, and the sealing performance of the conventional gear motor can only meet the performance requirement of the gear motor with the ordinary rotating speed, but cannot meet the performance index of the gear motor with the high back pressure.

SUMMERY OF THE UTILITY MODEL

For overcoming prior art's defect, the utility model aims to provide a high back pressure resistant gear motor of high rotational speed to overcome conventional gear motor installation and occupy bulky, the hydraulic fluid port distributes too big problem.

Therefore, the utility model provides a high-speed and high-backpressure resistant gear motor, which comprises a front cover, a shell, a transmission gear and a rear cover, wherein the front cover is in a cylindrical shape, a cylindrical surface of the front cover is provided with a plane groove, the plane groove is provided with an oil inlet and an oil outlet, and the inside of the front cover is also provided with a high-pressure oil cavity channel and a low-pressure oil cavity channel; the high-pressure oil cavity channel is communicated with the oil inlet, and the low-pressure oil cavity channel is communicated with the oil outlet.

The central axis of the oil inlet is parallel to the central axis of the oil outlet and is perpendicular to the plane of the plane groove.

Preferably, an oil seal seat is arranged in the front cover, a star-shaped sealing ring is arranged in the oil seal seat, and the star-shaped sealing ring is in sealing fit with the transmission gear.

Preferably, the front cover is provided with a pair of mounting holes, and the central axis of the mounting holes is perpendicular to the central axis of the front cover.

The utility model provides a high back pressure resistant gear motor of high rotational speed has following beneficial effect:

1. the oil inlet and outlet are integrated on the same plane and are directly communicated with the high pressure and the low pressure of the motor respectively, so that the oil inlet and outlet are more compact, and the problems of large occupied volume, non-compact appearance structure and overlarge oil port distribution of the conventional gear motor are solved;

2. compared with a traditional sealing structure which can bear 0.6MPa, the oil seal seat structure can bear 3MPa of back pressure, and the star ring surrounding the inside of the oil seal seat is of a winding structure and has certain interference fit, so that the gear motor is fully ensured to have better ductility under pressure impact, bear higher back pressure and be difficult to cause the oil seal to be broken down by high-pressure oil;

3. the cylindrical surface of the front cover is provided with a pair of mounting holes which are internal thread holes, so that the mounting space is greatly saved in the axial direction and the radial direction compared with a motor with the same specification.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic side view of a conventional gear motor according to the prior art;

FIG. 2 is a cross-sectional view of a conventional gear motor of the prior art;

FIG. 3 is a schematic diagram of an oil seal structure of a conventional gear motor in the prior art;

fig. 4 is a schematic side view of the high-speed and high-back-pressure resistant gear motor of the present invention;

fig. 5 is a cross-sectional view of the high speed, high back pressure resistant gear motor of the present invention;

fig. 6 is a schematic structural diagram of a star-shaped seal ring in the high-speed high-back-pressure resistant gear motor of the present invention;

fig. 7 is a schematic structural view of a front cover of the high-speed high-back-pressure resistant gear motor of the present invention;

fig. 8 is a schematic structural view of the direction a of the front cover of the high-speed high-back-pressure resistant gear motor of the present invention;

fig. 9 is a schematic structural view of the front cover in the direction B of the high-speed and high-back-pressure resistant gear motor of the present invention; and

fig. 10 is a C-C sectional view of the front cover of the high-speed high-back-pressure resistant gear motor according to the present invention.

Description of the reference numerals

1. A front cover; 2. an oil seal seat; 3. a star-shaped sealing ring; 4. a housing; 5. an oil seal structure; 11. mounting holes; 12. an oil outlet; 13. an oil inlet; 14. a low pressure oil cavity channel; 15. a high pressure oil cavity channel; 16. a planar groove.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 4 and 5, the utility model discloses a high-speed high-back-pressure resistant gear motor, include: the oil seal structure comprises a front cover 1, an oil seal seat 2, a shell 4 and a rear cover, wherein the front cover 1 is cylindrical.

Specifically, as shown in fig. 5 and 6, the front cover 1 has a gear mounting hole, a transmission gear is mounted in the gear mounting hole, the transmission gear and the gear mounting hole are sealed by an oil seal seat 2, and a star-shaped seal ring 3 is arranged between the oil seal seat 2 and the transmission gear, so as to achieve a sealing effect.

Wherein, require high rotational speed because of gear motor, the unique seal structure that the performance index of high backpressure adopted, its sealed mode is for using the oil blanket seat as the skeleton, star type circle is the integrated configuration of sealing material, compare the traditional 0.6MPa that can bear, the oil blanket seat structure can bear 3 MPa's backpressure, the inside star type circle that encircles of oil blanket seat is for winding the structure, there is certain interference fit, abundant assurance gear motor has better ductility under receiving pressure shock, bear higher backpressure, be difficult to lead to the oil blanket to be washed down by high-pressure oil.

Specifically, as shown in fig. 4, a pair of mounting holes 11 are provided on a cylindrical surface of the front cover 1, the mounting holes 11 are perpendicular to a central axis of the front cover 1, and the central axis of the mounting holes 11 intersects the central axis of the front cover 1, and the mounting holes 11 have an embedded thread inside for connection with other hydraulic components. Wherein, mounting hole 11 is two M8's internal thread holes, compares in the motor of the same specification all great saving installation space in axial and footpath.

As shown in fig. 7 to 10, a planar groove 16 perpendicular to the central axis is further formed on the cylindrical surface of the front cover 1, an oil inlet and an oil outlet are formed in the planar groove 16, and a high-pressure oil cavity channel 15 and a low-pressure oil cavity channel 14 are further formed in the front cover 1. One end of the high-pressure oil cavity channel 15 is communicated with the oil inlet 13, and the other end is communicated with a high-pressure area in the shell; one end of the low pressure oil channel 14 is communicated with the oil outlet 12, and the other end is communicated with the low pressure area in the shell, thereby forming a hydraulic circulation.

The utility model discloses a gear motor, appearance structure are different with conventional gear pump, and the appearance volume is more round, compact, and the business turn over hydraulic fluid port is integrated on the coplanar, respectively in the high-low pressure direct switch-on with the motor, the business turn over hydraulic fluid port is compacter, practices thrift whole material, has overcome conventional gear motor installation and has taken bulky, and appearance structure is not compact, and the hydraulic fluid port distributes too big problem.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-speed, high-backpressure resistant gear motor, comprising: a front cover (1), a shell (4), a transmission gear and a rear cover,

the front cover (1) is in a cylindrical shape, a plane groove (16) is formed in the cylindrical surface of the front cover (1), an oil inlet (13) and an oil outlet (12) are formed in the plane groove (16), and a high-pressure oil cavity channel (15) and a low-pressure oil cavity channel (14) are formed in the front cover (1); the high-pressure oil cavity channel (15) is communicated with the oil inlet (13), the low-pressure oil cavity channel (14) is communicated with the oil outlet (12),

the central axis of the oil inlet (13) is parallel to the central axis of the oil outlet (12), and the central axes are respectively vertical to the plane of the plane groove (16).

2. The high-speed high-backpressure-resistant gear motor as claimed in claim 1, wherein an oil seal seat (2) is arranged in the front cover (1), a star-shaped sealing ring (3) is arranged in the oil seal seat (2), and the star-shaped sealing ring (3) is in sealing fit with the transmission gear.

3. The high-speed high-back-pressure resistant gear motor according to claim 1, wherein the front cover (1) is provided with a pair of mounting holes (11), and the central axes of the mounting holes (11) are perpendicular to the central axis of the front cover (1).