CN213116540U

CN213116540U - Gear type hydraulic motor

Info

Publication number: CN213116540U
Application number: CN202021412446.2U
Authority: CN
Inventors: 邵星
Original assignee: Wuxi Dongye Machinery Manufacturing Co ltd
Current assignee: Wuxi Dongye Machinery Manufacturing Co ltd
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2021-05-04
Anticipated expiration: 2030-07-16

Abstract

The utility model discloses a gear formula hydraulic motor belongs to hydraulic motor technical field. The bearing device mainly comprises a radial sealing plate arranged on the inner wall of a shell, disk bodies and side plates, wherein the disk bodies and the side plates are arranged at two ends of a first gear and a second gear, the side surface of each disk body comprises a first conical surface and a second conical surface which are obliquely arranged, a first ball groove is formed in the second conical surface of each disk body, a bearing groove is formed in one side of each side plate facing the corresponding gear, a conical side wall parallel to the second conical surface is formed in the second conical surface corresponding to the disk bodies in the bearing groove, a second ball groove is formed in the first ball groove corresponding to the second conical surface in the conical side wall, and a ball assembly is clamped between the first ball groove and the second ball groove. The utility model discloses gear formula hydraulic motor has solved the problem of axial load aggravation gear end face friction to frictional resistance that receives when further reducing hydraulic motor operation.

Description

Gear type hydraulic motor

Technical Field

The utility model relates to a hydraulic motor technical field, concretely relates to gear formula hydraulic motor.

Background

The gear type hydraulic motor is an actuator in a hydraulic transmission system and is used for converting hydraulic energy into mechanical energy of rotary motion so as to drive a load to work. For a gear motor, the larger the friction is, the larger the torque loss is, so that a common gear type hydraulic motor is provided with a ball bearing or a needle bearing sleeved on a gear shaft for reducing the friction resistance borne by the gear during rotation; however, in the conventional gear type hydraulic motor, the ball bearings or needle roller bearings cannot be used for bearing axial loads, so that the axial loads are mostly applied to two ends of the gear, the end face friction of the gear is increased, and the output of torque is influenced.

There is a need to provide a gear type hydraulic motor to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem who solves: the gear type hydraulic motor is provided, so that the problem that the friction of the end face of the gear is aggravated by axial load is solved, and the friction resistance borne by the hydraulic motor during operation is further reduced.

In order to solve the technical problem, the utility model discloses a as follows technical scheme be: a gear type hydraulic motor comprises a shell, a front end cover and a rear end cover which are arranged at two ends of the shell, and a first gear and a second gear which are rotatably arranged in the shell and are meshed with each other, wherein the meshing point of the first gear and the second gear divides an inner cavity of the shell into a first chamber and a second chamber; the shell is provided with a first liquid hole communicated with the first chamber and a second liquid hole communicated with the second chamber, the inner side wall of the shell is provided with a radial sealing plate, an elastic layer is clamped between the shell and the radial sealing plate, the gear type hydraulic motor also comprises disc bodies arranged at two ends of the first gear and the second gear, the side surface of each disc body comprises a first conical surface and a second conical surface which are obliquely arranged, the second conical surface of the disk body is provided with a first ball groove, the gear type hydraulic motor also comprises a side plate arranged in the shell, a bearing groove is arranged on one side of the side plate facing the gear, a conical side wall which is flush with the second conical surface is arranged in the bearing groove corresponding to the second conical surface of the disc body, and a second ball groove is formed in the conical side wall corresponding to the first ball groove of the second conical surface, and a ball assembly is clamped between the first ball groove and the second ball groove.

Furthermore, the gear type hydraulic motor also comprises a transmission shaft arranged on the disc body at one end of the first gear.

Furthermore, a first shaft hole is formed in the position, corresponding to the transmission shaft, of the front end cover.

Furthermore, the side plates are provided with two side plates which are respectively positioned at two ends of the first gear and the second gear, and the bearing grooves on each side plate are provided with two disc bodies which respectively correspond to the end parts of the first gear and the second gear.

Furthermore, a second shaft hole in clearance fit with the transmission shaft is formed in the position, corresponding to the transmission shaft, of the side plate close to the front end cover.

Furthermore, the radial sealing plate is provided with a second through hole at a position corresponding to the first liquid hole and the second liquid hole, and the elastic layer is provided with a first through hole at a position corresponding to the first liquid hole and the second liquid hole.

Furthermore, the first gear and the second gear are symmetrically arranged in the shell, the other side of the first gear, which is back to the second gear, abuts against the arc-shaped surface of the radial closing plate, and the other side of the second gear, which is back to the first gear, also abuts against the arc-shaped surface of the radial closing plate.

The utility model has the beneficial technical effects that: the utility model relates to a gear formula hydraulic motor is equipped with the elastic layer between radial closing plate and casing inner wall, can offset a part of effort through elastic layer atress deformation when first gear and second gear receive the effect of the unbalanced pressure difference in both sides and take place the swing, reduce the radial frictional resistance of first gear and second gear, namely reduce the torque loss of hydraulic motor; the disc body is arranged at two ends of the first gear and the second gear, the side face of the disc body comprises a first conical surface and a second conical surface which are obliquely arranged, the end face of the gear is provided with a side plate, a bearing groove is formed in one side of the side plate facing the gear, a conical side wall which is parallel to the second conical surface is arranged in the bearing groove and corresponds to the second conical surface of the disc body, and radial and axial combined loads can be borne between the side plate and the disc body through the oblique matching mode of the conical side wall and the second conical surface on the side plate and the disc body, so that the end face friction force of the first gear and the second gear is reduced.

Drawings

The present invention will be further explained with reference to the drawings and examples.

In the figure: fig. 1 is a perspective view of a gear type hydraulic motor according to the present invention;

FIG. 2 is a right side view of the geared hydraulic motor of FIG. 1;

FIG. 3 is a cross-sectional view taken along the line A-A in FIG. 2;

FIG. 4 is a cross-sectional view taken along the line B-B in FIG. 2;

FIG. 5 is an enlarged schematic view of region E of FIG. 1;

fig. 6 is a schematic structural view of a housing 1 portion in a gear type hydraulic motor according to the present invention;

fig. 7 is an exploded view of a part of the internal structure of the gear type hydraulic motor of the present invention;

in the figure:

1. a housing; 101. a first liquid hole; 102. a second liquid hole; 103. an elastic layer; 1031. a first through hole; 104. a radial closing plate; 1041. a second through hole; 105. a first chamber; 106. a second chamber; 2. a front end cover; 201. a shaft hole; 3. a rear end cap; 4. a first gear; 5. a second gear; 6. a tray body; 601. a first conical surface; 602. a second conical surface; 6021. a first ball groove; 8. a side plate; 801. a bearing groove; 8011. a tapered sidewall; 8012. a second ball groove; 802. a ball assembly; 803. a second shaft hole; 9. a drive shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present application, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 and 3, a gear type hydraulic motor includes a housing 1, and a front end cover 2 and a rear end cover 3 covering both ends of the housing 1, and referring to fig. 3, the hollow housing 1 is rotatably provided therein with two first gears 4 and second gears 5 engaged with each other, a tooth surface contact line at a meshing point of the first gears 4 and the second gears 5 symmetrically divides an inner cavity of the housing 1 into a first chamber 105 and a second chamber 106, when in use, a high-pressure medium (such as hydraulic oil) is injected into one of the chambers, so that a pressure difference is formed between the two chambers, the first gears 4 and the second gears 5 are driven by the pressure difference to rotate to output torque, and conversion of hydraulic energy into mechanical energy is completed.

As shown in fig. 3, a first liquid hole 101 leading to the first chamber 105 and a second liquid hole 102 leading to the second chamber 106 are respectively formed in positions corresponding to the first chamber 105 and the second chamber 106 on the housing 1, a radial sealing plate 104 is disposed in the housing 1 and adjacent to a side wall of the housing 1, a second through hole 1041 is respectively formed in the radial sealing plate 104 corresponding to the first liquid hole 101 and the second liquid hole 102, an elastic layer 103 is interposed between the housing 1 and the radial sealing plate 104, in this embodiment, the elastic layer 103 is fixedly connected by adhesion, and a first through hole 1031 is respectively formed in the elastic layer 103 corresponding to the first liquid hole 101 and the second liquid hole 102, so that the radial sealing plate 104 and the housing 1 are flexibly connected by the elastic layer 103.

Referring to fig. 3, the first gear 4 and the second gear 5 are symmetrically disposed in the housing 1, the other side of the first gear 4 facing away from the second gear 5 abuts against the arc-shaped surface of the radial sealing plate 104, and the other side of the second gear 5 facing away from the first gear 4 also abuts against the arc-shaped surface of the radial sealing plate 104, referring to fig. 4 and 7, a disc body 6 is fixedly connected to both ends of the first gear 4 and the second gear 5, further referring to fig. 5, a side surface of each disc body 6 includes a first conical surface 601 facing the gear and a second conical surface 602 facing away from the gear, a first ball groove 6021 is formed in the second conical surface 602 of each disc body 6, the hydraulic motor of the present embodiment further includes a transmission shaft 9, and the transmission shaft 9 is fixedly connected to a center position of the disc body 6 at one end of the first gear 4.

Referring to fig. 4 and 7, the gear type hydraulic motor of the present embodiment further includes two side plates 8 disposed inside the housing 1, and each side plate 8 is respectively installed between the gear and the end cover, each side plate 8 is symmetrically provided with two bearing grooves 801 on one side thereof facing the gear, and the bearing grooves 801 have a contour shape similar to that of the disc body 6, so that the disc body 6 can be received in the bearing grooves 801 of the side plates 8, in order to enable the first gear 4 and the second gear 5 to rotate smoothly, a tapered side wall 8011 flush with the second tapered side surface 602 is provided in each bearing groove 801 corresponding to the second tapered surface 602 of the disc body 8, and a second ball groove 8012 is provided in each tapered side wall 8011 corresponding to the first ball groove 6021 of the second tapered surface 602, a ball assembly 802 is installed between each corresponding first ball groove 6021 and second ball groove 8012, the resistance force applied when the first gear 4 and the second gear 5 rotate is reduced through the contact mode of rolling friction, meanwhile, the side plates 8 and the disc body 6 can bear radial and axial combined load through the inclined contact of the tapered side walls 8011 and the second conical surfaces 602, and the friction force of the end surfaces of the first gear 4 and the second gear 5 is reduced.

Meanwhile, in order to ensure the end face sealing performance of the first gear 4 and the second gear 5, the end face position of each side plate 8 facing to the gear, namely the end face position provided with the bearing groove 801, is abutted against the tooth-shaped faces of the first gear 4 and the second gear 5, and in order to ensure that the radial directions of the first gear 4 and the second gear 5 have good sealing performance, the arc side faces of the two side plates 8 are flush with the addendum circles of the first gear 4 and the second gear 5; furthermore, in the present embodiment, the side plate 8, which is located adjacent to the front cover 2, has a second shaft hole 803 that is in clearance fit with the transmission shaft 9 at a position corresponding to the transmission shaft 9.

A first shaft hole 201 is formed on the front end cover 2 at a position corresponding to the transmission shaft 9, so that the transmission shaft 9 extends to the outside of the housing 1.

The working process of the gear type hydraulic motor of the present invention is described below with reference to the accompanying drawings:

one end of the transmission shaft 9 extending out of the housing 1 can be connected with a load through a key connection or a coupling, as shown in fig. 3, when the load is required to be driven to rotate by the gear-type hydraulic motor of the present embodiment, a high-pressure medium is introduced from the first fluid hole 101 or the second fluid hole 102, a return line is connected to the second port 102 or the first port 101, and it is assumed that the high-pressure medium enters the first chamber 105 from the first port 101, and the first chamber 105 is a high-pressure chamber, due to the unbalanced stress on the tooth parts of the first chamber 105 and the second chamber 106, the first gear 4 is forced to rotate clockwise while the second gear 5 rotates counterclockwise, the first gear 4 and the second gear 5 rotate and continuously convey the liquid medium in the first chamber 105 to the second chamber 106 through the closed space formed by the adjacent two teeth and the radial closing plate 104, and the liquid medium is recovered through the second liquid hole 102, so that the hydraulic energy of the high-pressure medium is converted into the mechanical energy of the rotary motion.

The gear type hydraulic motor of the utility model is provided with the elastic layer 103 between the radial closing plate 104 and the inner wall of the shell 1, when the first gear 4 and the second gear 5 are subjected to unbalanced pressure difference action on two sides and swing, a part of acting force can be offset by the stressed deformation of the elastic layer 103, and the radial friction resistance of the first gear 4 and the second gear 5 is reduced, namely the torque loss of the hydraulic motor is reduced; the two ends of the first gear 4 and the second gear 5 are provided with the disc body 6, the side surface of the disc body 6 comprises a first conical surface 601 and a second conical surface 602 which are obliquely arranged, the end surface of the gear is provided with a side plate 8, one side of the side plate 8 facing the gear is provided with a bearing groove 801, the bearing groove 801 is internally provided with a conical side wall 8011 which is flush with the second conical surface 602 and corresponds to the second conical surface 602 of the disc body 6, and radial and axial combined load can be borne between the side plate 8 and the disc body 6 through the oblique matching mode of the conical side wall 8011 and the second conical surface 602 on the side plate 8 and the disc body 6, so that the end surface friction force of the first gear 4 and the second gear 5 is reduced.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A gear type hydraulic motor includes a housing (1), a front end cover (2) and a rear end cover (3) provided at both ends of the housing (1), and a first gear (4) and a second gear (5) rotatably provided in the housing (1) and engaged with each other, an inner cavity of the housing (1) is partitioned into a first chamber (105) and a second chamber (106) at an engagement point of the first gear (4) and the second gear (5), characterized in that: the hydraulic motor is characterized in that a first liquid hole (101) communicated with a first chamber (105) and a second liquid hole (102) communicated with a second chamber (106) are formed in the shell (1), a radial sealing plate (104) is arranged on the inner side wall of the shell (1), an elastic layer (103) is arranged between the shell (1) and the radial sealing plate (104), the hydraulic motor further comprises a disc body (6) arranged at two ends of the first gear (4) and the second gear (5), the side surface of each disc body (6) comprises a first conical surface (601) and a second conical surface (602) which are obliquely arranged, a first ball groove (6021) is formed in the second conical surface (602) of each disc body (6), the hydraulic motor further comprises a side plate (8) arranged in the shell (1), and a bearing groove (801) is formed in one side of each side plate (8) facing the gear, a second conical surface (602) corresponding to the disc body (6) in the bearing groove (801) is provided with a conical side wall (8011) which is flush with the second conical surface (602), a first ball groove (6021) corresponding to the second conical surface (602) on the conical side wall (8011) is provided with a second ball groove (8012), and a ball assembly (802) is clamped between the first ball groove (6021) and the second ball groove (8012).

2. The geared hydraulic motor of claim 1, wherein: the gear type hydraulic motor also comprises a transmission shaft (9) arranged on the disc body (6) at one end of the first gear (4).

3. The gear type hydraulic motor according to claim 2, wherein: a first shaft hole (201) is formed in the position, corresponding to the transmission shaft (9), of the front end cover (2).

4. The geared hydraulic motor of claim 1, wherein: the side plates (8) are provided with two ends which are respectively positioned at the first gear (4) and the second gear (5), and the bearing groove (801) on each side plate (8) is provided with two disc bodies (6) which respectively correspond to the ends of the first gear (4) and the second gear (5).

5. The gear type hydraulic motor according to any one of claims 1 to 4, wherein: and a second shaft hole (803) which is in clearance fit with the transmission shaft (9) is formed in the position, corresponding to the transmission shaft (9), of the side plate (8) close to the front end cover (2).

6. The geared hydraulic motor of claim 1, wherein: and the positions of the radial closing plate (104) corresponding to the first liquid hole (101) and the second liquid hole (102) are respectively provided with a second through hole (1041), and the positions of the elastic layer (103) corresponding to the first liquid hole (101) and the second liquid hole (102) are respectively provided with a first through hole (1031).

7. The geared hydraulic motor of claim 1, wherein: the first gear (4) and the second gear (5) are symmetrically arranged in the shell (1), the other side, back to the second gear (5), of the first gear (4) abuts against the arc-shaped surface of the radial closing plate (104), and the other side, back to the first gear (4), of the second gear (5) also abuts against the arc-shaped surface of the radial closing plate (104).