CN210686497U

CN210686497U - Hydraulic motor with high climbing performance and engineering transport vehicle

Info

Publication number: CN210686497U
Application number: CN201921591808.6U
Authority: CN
Inventors: 李长民; 徐玮
Original assignee: Ningbo Hengtong Nuoda Hydraulic Co ltd
Current assignee: Ningbo Hengtong Nuoda Hydraulic Co ltd
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-06-05
Anticipated expiration: 2029-09-23

Abstract

The utility model discloses a hydraulic motor and engineering haulage vehicle with high climbing performance, hydraulic motor with high climbing performance includes motor housing, but axial displacement's variable speed stator and the rotor assembly that links to each other with the axletree, the rotor assembly periphery be provided with but radial displacement's a plurality of plunger subassemblies, variable speed stator's inner circle has takes tapering inner curve raceway, the motor housing outside is provided with control valve subassembly, one side of variable speed stator is provided with the elasticity piece that resets, be provided with the pressure chamber between motor housing and the variable speed stator, control valve subassembly control hydraulic oil enters into the pressure intracavity, elasticity resets and resets hydraulic pressure change makes variable speed stator do axial displacement in the cooperation pressure intracavity, its advantage is that switching efficiency between the high low moment of torsion has been improved.

Description

Hydraulic motor with high climbing performance and engineering transport vehicle

Technical Field

The utility model belongs to the technical field of the hydraulic motor and specifically relates to a hydraulic motor and engineering haulage vehicle with high climbing performance is related to.

Background

In the mining, underground mining, transportation and related construction processes of mines, because the working environment is severe, the road surface has large gradient and is rugged, heavy-duty loading vehicles are required to have high-performance climbing capability and high trafficability of the rugged road surface, so that the safety of drivers and passengers and vehicles is ensured.

The conventional heavy transport vehicle mostly adopts a constant power pump hydraulic system, and supplies hydraulic energy to a hydraulic motor for driving the vehicle so as to drive the vehicle to move. The disadvantages of heavy vehicles employing constant power pumps are: because the hydraulic system pipeline is complicated, and the oil pipe is longer from the hydraulic pump to the hydraulic motor pipeline of drive, and hydraulic pump hydraulic system's feedback time is longer, meets road surface resistance increase if the vehicle travel process, and the constant power hydraulic pump can not timely for hydraulic motor self-regulation time to cause hydraulic motor to damage even burn the machine and scrap.

In order to overcome the defects, the utility model with the Chinese patent number 201721070960.0 discloses a hydraulic motor with a stepless speed change function and an engineering transport vehicle, which comprises a motor front cover, a motor rear cover, a stator and a rotor assembly connected with a wheel shaft, wherein the periphery of the rotor assembly is provided with a plurality of plunger assemblies capable of moving radially, an oil cylinder is fixedly arranged between the motor front cover and the motor rear cover, the stator is a speed change stator capable of moving axially, the oil cylinder can drive the stator to move axially back and forth, and the inner ring of the speed change stator is provided with a tapered inner curve raceway; when the variable speed stator is driven by the oil cylinder to linearly move back and forth along the axial direction, the stroke of the plunger assembly gradually changes along with the linear change of the large and small inner diameter height drop of the tapered inner curve track of the variable speed stator, and the variable speed stator moves through the speed increasing oil hole and the speed reducing oil hole. The utility model discloses a stepless speed change has been realized on the one hand in the creation, and on the other hand has realized the change of moment of torsion at stepless speed change's in-process.

The prior art has the following disadvantages: in the prior art, the speed-increasing oil hole and the speed-reducing oil hole are adopted to realize speed change, the speed-changing efficiency is low, two additional hydraulic input systems are needed to convey oil to the speed-increasing oil hole and the speed-reducing oil hole, and the structure is complex.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a hydraulic motor and engineering haulage vehicle that have high climbing performance that can realize quick adjustment hydraulic motor's output torque is provided.

The utility model provides a technical scheme that above-mentioned technical problem adopted is for having hydraulic motor of high climbing performance, including motor housing, but axial displacement's variable speed stator and the rotor assembly that links to each other with the axletree, rotor assembly periphery be provided with a plurality of plunger subassemblies that can radial movement, the inner circle of variable speed stator has takes tapering inner curve raceway, the motor housing outside is provided with control valve subassembly, one side of variable speed stator is provided with the elasticity piece that resets, is provided with the pressure chamber between motor housing and the variable speed stator, control valve subassembly control hydraulic oil enters into the pressure chamber, elasticity resets the hydraulic pressure change in the cooperation pressure chamber and makes variable speed stator do axial displacement.

The utility model discloses further preferred scheme does: the control valve assembly comprises a valve body, a valve core capable of moving axially and a hydraulic channel communicated with a pressure cavity are arranged in the valve body, and the valve core comprises an oil inlet part and an oil outlet part; when the oil inlet part is filled with hydraulic oil, the valve core moves to enable the oil inlet part to be aligned to the hydraulic channel, and hydraulic pressure is provided for the pressure cavity; when the oil inlet part stops injecting hydraulic pressure, the valve core moves and resets to enable the oil outlet part to be aligned to the hydraulic channel, and hydraulic oil in the pressure cavity flows out of the oil outlet part.

The utility model discloses further preferred scheme does: the oil inlet part comprises an oil inlet channel and an oil inlet ring groove which are communicated, the oil outlet part comprises an oil outlet channel and an oil outlet ring groove which are communicated, and the oil inlet ring groove and the oil outlet ring groove are both surrounded on the side wall of the valve core; the hydraulic channel is respectively aligned to the oil outlet ring groove and the oil inlet ring groove along with the movement of the valve core.

The utility model discloses further preferred scheme does: a first reset cavity is arranged on one side of the oil outlet part, and a reset spring is arranged in the first reset cavity; when hydraulic oil is introduced, the valve core moves towards the return spring and extrudes the return spring, and the oil inlet part is aligned to the hydraulic channel; when the hydraulic oil stops, the valve core returns to the initial position under the action of the return spring, and the oil outlet part is aligned to the hydraulic channel.

The utility model discloses further preferred scheme does: the side wall of the valve core facing the first reset cavity is provided with a fixed groove, and one end of the reset spring is arranged in the fixed groove.

The utility model discloses further preferred scheme does: and an oil drainage channel is also arranged in the valve body and communicated with the first reset cavity.

The utility model discloses further preferred scheme does: the elastic reset piece is a reset spring.

The utility model discloses further preferred scheme does: one side of the pressure cavity towards the spring reset piece is the inner wall of the variable speed stator, and the inner wall moves towards the elastic reset piece under the extrusion of hydraulic oil.

The utility model discloses further preferred scheme does: one side of variable speed stator towards the elasticity piece that resets be the second chamber that resets, the elasticity piece that resets holds in the second intracavity that resets, the second resets the draining passageway that the chamber connects the casing.

The utility model discloses further preferred scheme does: the variable speed stator is characterized in that a plurality of limiting lugs are arranged on one side of the variable speed stator in a surrounding mode, a plurality of limiting grooves are arranged on the corresponding motor shell in a surrounding mode, and the variable speed stator moves to drive the limiting lugs and the limiting grooves to do piston motion.

The utility model discloses further preferred scheme does: the motor shell comprises a motor front cover and a motor rear cover, the limiting groove is formed in the motor front cover, and the control valve assembly is arranged on the motor rear cover.

The utility model discloses further preferred scheme does: the outer wall of the valve core is also surrounded with a first balance groove, a second balance groove and a third balance groove, the first balance groove and the second balance groove are arranged between the oil inlet ring groove and the oil outlet ring groove, and the third balance groove is arranged on the oil outlet part.

An industrial truck characterized by a hydraulic motor with high climbing performance of the above character.

The working principle is as follows:

1. hydraulic oil of the control valve assembly comes from the hydraulic pump, enters an oil inlet and an oil outlet of the motor and drives the motor to rotate; when a vehicle encounters a steep slope and needs to increase power, a driver and passengers step on an accelerator suddenly, the output pressure of a hydraulic pump is increased, the oil pressure supplied to a hydraulic motor driven by the vehicle is also increased simultaneously, the hydraulic pressure of the control valve assembly is synchronously increased at the moment, the valve core in the control valve is pushed by the hydraulic pressure to overcome the elastic force of a return spring to move rightwards, when the valve core is moved rightwards to be communicated with a pressure cavity, the hydraulic oil enters the pressure cavity, and a speed change stator is pushed by the hydraulic pressure to overcome the elastic force of an elastic return part of the hydraulic motor to move rightwards rapidly; because the inner curved surface of the variable speed stator has a conical fall, the moving stroke of the plunger assembly is increased; when the variable speed stator is displaced to the rightmost end, the height drop of the curved surface of the variable speed stator is maximized, so that the stroke of the plunger assembly in the motor rotor assembly is also maximized.

Calculating a torque formula and a motor rotating speed formula according to the theoretical output of the motor:

n (motor torque) × Q × (motor displacement) × Δ P (differential pressure) × 0.159

V (motor rotation speed) ↓ ═ L (pump flow)/Q (motor displacement) ×

At this time, the motor displacement Q rapidly increases, and the hydraulic oil pressure difference Δ P entering the motor increases. The output torque N of the motor is synchronously and rapidly increased, the driving force of the vehicle is simultaneously increased, and the climbing performance of the vehicle and the traffic capacity of a concave-convex road surface are greatly improved.

Because the flow L of hydraulic pump output keeps invariable, motor speed reduces this moment, lets you be more suitable for vehicle climbing and the unsmooth road surface is current, can avoid the vehicle to pitch simultaneously, and the impact of traveling improves driver and crew travelling comfort and security.

2. When climbing the end, the throttle reduces the back, reduce along with hydraulic pump output pressure delta P, the case moves to the right under the reset spring effect and resets, oil outlet portion and pressure chamber switch-on through the case, the oil pressure of pressure intracavity passes through oil outlet portion and motor housing draining port switch-on, the pressure of pressure intracavity releases rapidly, the variable speed stator moves to the right under the elasticity effect that the elasticity resets and resets, variable speed stator curved surface height drop diminishes, the plunger stroke in the rotor assembly diminishes in step, the motor discharge capacity diminishes, according to motor theory output torque formula and motor output rotational speed computational formula:

n (motor torque) ↓ (Q ↓ (displacement) × (Δ P (differential pressure) ↓0.159)

V (motor rotation speed) × L (pump flow rate)/Q (motor displacement) ↓

The output torque of the motor is synchronously reduced, and the flow L of the hydraulic pump is constant, so that after the displacement of the motor is reduced, the rotating speed of the motor is increased, the speed of the vehicle is increased, the vehicle recovers the high-speed running state on a flat road, and the economic performance and the transportation efficiency of the vehicle are greatly improved.

The utility model arranges the control valve component outside the motor shell, and controls the opening and closing of the high-pressure hydraulic pressure in the pressure cavity through the control valve component; when the control valve assembly is introduced with high-pressure hydraulic pressure, the high-pressure hydraulic pressure pushes the variable speed stator to move and extrudes the elastic reset piece, so that the stroke of the plunger assembly is enlarged, and the output torque is enhanced; when the control valve assembly closes the introduced high-pressure hydraulic pressure, the variable speed stator resets under the action of the elastic resetting piece, the stroke of the plunger assembly is shortened, and therefore the output torque is restored to a normal level. The step that the original hydraulic motor needs to be fed with high-pressure hydraulic pressure twice to adjust the torque is omitted, and the switching efficiency between high torque and low torque is improved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is a schematic structural diagram of the oil outlet portion of the control valve assembly communicating with the hydraulic passage;

FIG. 4 is a schematic structural diagram of a hydraulic passage communicated with an oil inlet of the control valve assembly;

fig. 5 is a sectional view of the valve cartridge of the present invention;

FIG. 6 is a perspective view of the valve core of the present invention;

fig. 7 is a first perspective view of the variable speed stator of the present invention;

fig. 8 is a second perspective view of the variable speed stator of the present invention;

fig. 9 is a first perspective view of the rear cover of the motor of the present invention;

fig. 10 is a second perspective view of the rear cover of the motor of the present invention;

fig. 11 is a perspective view of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 11, a hydraulic motor with high climbing performance includes a motor housing 1, the motor housing 1 is located outside the hydraulic motor, a variable speed stator 2 capable of moving axially and a rotor assembly 4 connected to a wheel axle 3, the rotor assembly 4 drives the wheel axle 3 to rotate, a plurality of plunger assemblies 5 capable of moving radially are arranged on the periphery of the rotor assembly 4, an inner ring of the variable speed stator 2 has a tapered inner curved raceway 6, a control valve assembly 7 is arranged outside the motor housing 1, an elastic reset member 8 is arranged on one side of the variable speed stator 2, a pressure chamber 9 is arranged between the motor housing 1 and the variable speed stator 2, the control valve assembly 7 controls hydraulic oil to enter the pressure chamber 9, and the elastic reset member 8 cooperates with hydraulic pressure change in the pressure chamber 9 to move the variable speed stator 2 axially. Because the variable speed stator is provided with the tapered inner curve raceway 6, the variable speed stator shaft 2 moves to cause the stroke of the plunger assembly 5 to change. On the premise of constant oil supply quantity, the stroke is changed to cause the change of the rotating speed, and the torque output outwards is changed after the change of the rotating speed, so that the device is suitable for different working environments. In a severe working environment, the torque can be greatly improved only by increasing the stroke of the plunger assembly 5. Under the combined action of a plurality of components such as the control valve component 7, the elastic reset piece 8, the pressure cavity 9 and the like, the variable speed stator 2 is quickly moved and reset, so that the change of the torque is quickly controlled. The control valve assembly 7 controls whether hydraulic pressure enters the pressure chamber 9, and the pressure chamber 9 and the elastic resetting piece 8 interact to realize the movement of the variable speed stator 2.

As shown in fig. 3 and 4, the control valve assembly 7 includes a valve body 10, an axially movable valve spool 11 and a hydraulic passage 12 communicating with the pressure chamber 9 are provided in the valve body 10, and the hydraulic passage 12 includes two portions, one portion being provided in the valve spool 10 and one portion being provided in the motor housing 1. The valve core 11 comprises an oil inlet part 13 and an oil outlet part 14; when the oil inlet part 13 is filled with hydraulic oil, the valve core 11 moves to enable the oil inlet part 14 to be aligned with the hydraulic channel 12, and hydraulic pressure is provided for the pressure cavity 9; when the oil inlet portion 13 stops injecting hydraulic pressure, the valve core 11 moves and resets, so that the oil outlet portion 14 is aligned with the hydraulic passage 12, and hydraulic oil in the pressure chamber 9 flows out from the oil outlet portion 14. The valve core 11 moves back and forth to realize the back and forth switching of oil inlet and oil outlet. The elastic reset piece 8 is a reset spring.

As shown in fig. 5 and 6, the oil inlet portion 13 includes an oil inlet passage 131 and an oil inlet ring groove 132 which are communicated with each other, the oil outlet portion 14 includes an oil outlet passage 141 and an oil outlet ring groove 142 which are communicated with each other, and both the oil inlet ring groove 132 and the oil outlet ring groove 142 surround the side wall of the valve core 11; the hydraulic passages align with the oil outlet groove 142 and the oil inlet groove 132, respectively, as the spool 11 moves. The oil outlet ring groove 142 and the oil inlet ring groove 132 are annular, so that the valve element 11 does not need to be rotated to a specific position, and the oil outlet ring groove 142 and the oil inlet ring groove 132 can be aligned with the hydraulic passage 12 only by being pushed to a preset position.

As shown in fig. 3 to 6, a first return chamber 15 is provided at one side of the oil outlet portion 14, and a return spring 16 is provided in the first return chamber 15; when hydraulic oil is introduced, the valve core 11 moves towards the return spring 16 and extrudes the return spring 16, the oil inlet part 13 is aligned with the hydraulic channel 12, and the pressure cavity 9 is filled with high-pressure hydraulic oil; when the hydraulic oil stops, the valve core 11 returns to the initial position under the action of the return spring 16, the oil outlet part 13 is aligned with the hydraulic channel 12, and the high-pressure hydraulic oil in the pressure chamber 9 stops being supplied and moves to the left under the action of the elastic return element 8. A fixing groove 17 is formed in the side wall, facing the first reset cavity 15, of the valve core 11, and one end of the reset spring 16 is arranged in the fixing groove 17, so that the reset spring 16 is prevented from shaking in the valve core 11. An oil drainage channel 18 is further arranged in the valve body 10, the oil drainage channel 18 is communicated with the first reset cavity 15, and the oil drainage channel 18 is connected with an oil drainage gap in the shell 1, so that redundant hydraulic oil is guided out of the hydraulic motor and enters the hydraulic oil recovery device. The outer wall of the valve core 2 is surrounded by a first balance groove 25, a second balance groove 26 and a third balance groove 27, the first balance groove 25 and the second balance groove 26 are arranged between the oil inlet ring groove 132 and the oil outlet ring groove 142, and the third balance groove 27 is arranged on the oil outlet portion.

As shown in fig. 1 and 2, the side of the pressure chamber 9 facing the spring return element 8 is an inner wall 19 of the shifting stator 2, and the hydraulic oil presses the inner wall 19 to move toward the elastic return element 8. One side of variable speed stator 2 towards elasticity piece 8 resets is the second chamber 20 that resets, and elasticity piece 8 that resets holds in second chamber 20 that resets, and second chamber 20 that resets connects the draining passageway of casing 1. As shown in fig. 7-10, the other side of the variable speed stator 2 is surrounded by a plurality of limiting protrusions 21, the corresponding motor housing is surrounded by a plurality of limiting grooves 22, and the variable speed stator 2 moves to drive the limiting protrusions 21 and the limiting grooves 22 to perform piston movement. The motor housing 1 includes a motor front cover 23 and a motor rear cover 24, the limit groove 22 is provided on the motor front cover 23, and the control valve assembly 7 is provided on the motor rear cover 24.

An engineering transportation vehicle comprises the hydraulic motor with high climbing performance.

It is right above the utility model provides a hydraulic motor and engineering haulage vehicle with high climbing performance have carried out detailed introduction, and it is right to have used specific individual example herein the utility model discloses a principle and implementation mode have been elucidated, and the description of above embodiment is only used for helping understanding the utility model discloses and core thought. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The hydraulic motor with high climbing performance comprises a motor shell, a variable speed stator capable of moving axially and a rotor assembly connected with a wheel shaft, wherein a plurality of plunger assemblies capable of moving radially are arranged on the periphery of the rotor assembly, an inner ring of the variable speed stator is provided with a tapered inner curve raceway, and the hydraulic motor is characterized in that a control valve assembly is arranged on the outer side of the motor shell, an elastic reset piece is arranged on one side of the variable speed stator, a pressure cavity is arranged between the motor shell and the variable speed stator, the control valve assembly controls hydraulic oil to enter the pressure cavity, and the elastic reset piece is matched with hydraulic change in the pressure cavity to enable the variable speed stator to move axially.

2. The hydraulic motor with high climbing performance as claimed in claim 1, wherein the control valve assembly includes a valve body, in which a valve core is disposed to be axially movable and a hydraulic passage communicating with the pressure chamber, the valve core including an oil inlet portion and an oil outlet portion; when the oil inlet part is filled with hydraulic oil, the valve core moves to enable the oil inlet part to be aligned to the hydraulic channel, and hydraulic pressure is provided for the pressure cavity; when the oil inlet part stops injecting hydraulic pressure, the valve core moves and resets to enable the oil outlet part to be aligned to the hydraulic channel, and hydraulic oil in the pressure cavity flows out of the oil outlet part.

3. The hydraulic motor with high climbing performance according to claim 2, wherein the oil inlet portion includes an oil inlet passage and an oil inlet ring groove which are communicated with each other, the oil outlet portion includes an oil outlet passage and an oil outlet ring groove which are communicated with each other, and the oil inlet ring groove and the oil outlet ring groove are both surrounded on the side wall of the valve core; the hydraulic channel is respectively aligned to the oil outlet ring groove and the oil inlet ring groove along with the movement of the valve core.

4. The hydraulic motor with high climbing performance according to claim 2, wherein a first return chamber is provided at one side of the oil outlet portion, and a return spring is provided in the first return chamber; when hydraulic oil is introduced, the valve core moves towards the return spring and extrudes the return spring, and the oil inlet part is aligned to the hydraulic channel; when the hydraulic oil stops, the valve core returns to the initial position under the action of the return spring, and the oil outlet part is aligned to the hydraulic channel.

5. The hydraulic motor with high climbing performance according to claim 4, wherein a fixing groove is provided on a side wall of the valve core facing the first return chamber, and one end of the return spring is disposed in the fixing groove.

6. The hydraulic motor with high climbing performance according to claim 4, wherein a drain passage is further arranged in the valve body, and the drain passage is communicated with the first reset cavity.

7. The hydraulic motor with high climbing performance according to claim 1, wherein the elastic return member is a return spring.

8. The hydraulic motor with high climbing performance as claimed in claim 1, wherein the side of the pressure chamber facing the spring return member is an inner wall of the variable speed stator, and the hydraulic oil presses the inner wall to move toward the elastic return member.

9. The hydraulic motor with high climbing performance as set forth in claim 1, wherein the side of the variable speed stator facing the elastic restoring member is a second restoring chamber, the elastic restoring member is accommodated in the second restoring chamber, and the second restoring chamber is connected to the oil drainage passage of the housing.

10. The hydraulic motor with high climbing performance as claimed in claim 1, wherein the variable speed stator has a plurality of limiting protrusions around one side thereof and a plurality of limiting grooves around the corresponding motor housing, and the variable speed stator moves to drive the limiting protrusions and the limiting grooves to perform a piston motion.

11. The hydraulic motor with high climbing performance according to claim 10, wherein the motor housing includes a motor front cover and a motor rear cover, the limiting recess is provided on the motor front cover, and the control valve assembly is provided on the motor rear cover.

12. The hydraulic motor with high climbing performance as claimed in claim 3, wherein the outer wall of the spool further surrounds first, second and third balance grooves, the first and second balance grooves are provided between the oil inlet ring groove and the oil outlet ring groove, and the third balance groove is provided on the oil outlet portion.

13. A construction vehicle, characterized by comprising a hydraulic motor with high climbing performance according to any one of claims 1 to 12.