CN112594124B

CN112594124B - Integrated motor with automatic overload unloading function

Info

Publication number: CN112594124B
Application number: CN202110109975.8A
Authority: CN
Inventors: 汪龙; 黄日; 王标; 李亮; 徐志驰; 金琦
Original assignee: Hefei Wanye Hydraulic Component Co ltd
Current assignee: Hefei Wanye Hydraulic Component Co ltd
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2022-10-21
Anticipated expiration: 2041-01-27
Also published as: CN112594124A

Abstract

The invention discloses an integrated motor with an automatic overload unloading function, which comprises a shell, a sealing cover, an electromagnetic valve and a one-way overflow valve, wherein the shell is provided with a driving oil cavity, an oil inlet hole groove, an oil outlet hole groove, a sealing groove I, a pin hole, a long screw hole, an oil inlet, an overflow valve mounting hole, an electromagnetic valve mounting hole, a transition cavity, an overflow hole, a test port and an oil outlet; the output shaft and the slave shaft are mutually connected through two groups of double-hole shaft sleeves, and the double-hole shaft sleeves are provided with a sealing groove II, an oil discharging port, an oil discharging straight groove, a sealing ring II and a tetrafluoroethylene gasket; the invention also provides corresponding processing, mounting and using processes. The invention forms an integrated motor with a novel structure, can realize the dual functions of motor driving and control, has the effect of pressure-relieving soft start when starting up, realizes the functions of automatic unloading of overload and temperature control start and stop, can reduce the stop time of an output shaft when stopping, and eliminates the phenomenon of vacuum air columns which possibly occur.

Description

Integrated motor with automatic overload unloading function

Technical Field

The invention relates to the technical field of gear motors of hydraulic systems, in particular to an integrated motor with an automatic overload unloading function.

Background

The modern engineering machinery generally adopts hydraulic transmission, and due to the characteristics of the hydraulic transmission and the relatively severe working environment and working condition of the engineering machinery, the heat generated by the system is not enough to be dissipated only by the surfaces of an oil tank, elements and pipe fittings. The hydraulic oil may deteriorate when working at an excessively high temperature, and oil residue and a coating of an oil tank are peeled off, so that a throttling port is blocked. At high temperature, the viscosity and lubricity of the oil are reduced, so that the service life of elements is greatly shortened, and the aging of components such as sealing elements, fillers, hoses, oil filters and the like is accelerated. The heat dissipation function of the engineering machinery is realized by driving a cooling medium through a cooling device and absorbing or dissipating waste heat generated by a heat source of the engineering machinery, and a fan hydraulic motor is a common air cooling mode.

In the existing hydraulic system of the engineering machinery, a hydraulically driven gear motor is used as an executing element of the hydraulic system, oil supply required by the gear motor is often directly provided by the hydraulic system, and in many cases, the oil pressure of the oil supply of the hydraulic system greatly exceeds the oil pressure required by the rotation of the gear motor, so that the defects of gear shaft overload, excessive wear of a friction pair and the like are caused.

In addition, in order to make the gear motor better cooperate with the heat dissipation control of the hydraulic system, some control valve elements, such as a temperature control valve, an overflow valve, a check valve, an overload prevention valve, etc., are often required to be added, and these control valve elements and the gear motor together form a servo control system of the hydraulic system.

Based on this, the invention tries to integrate the control valve element into a gear motor at the same time, and provides a corresponding installation structure and a corresponding processing process, so as to realize the integration of control and drive and realize the automatic unloading function of overload.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides an integrated motor with an automatic overload unloading function.

In order to achieve the purpose, the invention adopts the following technical scheme:

an integrated motor with an overload automatic unloading function comprises a shell, a sealing cover arranged at the front end of the shell, and an electromagnetic valve and a one-way overflow valve which are inserted in the shell, wherein a driving oil cavity body which is hermetically sleeved with an output gear and a slave gear is arranged on the front end face of the shell, the driving oil cavity body is specifically an 8-shaped spindle cavity structure which is horizontally arranged, an oil inlet hole groove is communicated above the central part of the driving oil cavity body, an oil outlet hole groove is communicated below the central part of the driving oil cavity body, the oil inlet hole groove and the oil outlet hole groove are symmetrically distributed along the driving oil cavity body, and the oil inlet hole groove, the oil outlet hole groove and the driving oil cavity body form a cavity structure with a four-petal-shaped cross section;

the sealing structure comprises a shell, a front end face of the shell, four petal-shaped cavity structures, a sealing groove I, a sealing ring I, pin holes and long screw holes, wherein the front end face of the shell is positioned outside the four petal-shaped cavity structures;

the output gear is meshed with the slave gear, the outer contours of the output gear and the slave gear are respectively sealed with the inner side wall of the driving oil cavity through an oil film of hydraulic oil, the output gear is fixedly sleeved in the middle of the output shaft, the slave gear is fixedly sleeved in the middle of the slave shaft, the driving oil cavity is provided with a circular groove which is movably clamped with the output shaft and the slave shaft respectively, one side, close to the shell, of the sealing cover is provided with a circular groove which is movably clamped with the slave shaft, the middle of the sealing cover is provided with a bearing hole, the bearing hole is in interference clamping connection with the outer ring wall of the bearing, the inner ring wall of the bearing is in transition fit clamping connection with the output shaft, one side, far away from the shell, of the sealing cover is fixedly connected with a mounting lug plate, and two sides of the mounting lug plate are provided with symmetrical U-shaped positioning grooves for fixedly mounting the sealing cover and the shell;

the output shaft and the slave shaft are connected with each other through two groups of double-hole shaft sleeves, the output gear and the slave gear are both positioned between the two groups of double-hole shaft sleeves, the double-hole shaft sleeves are of 8-shaped shaft sleeve structures with two shaft holes, the outer wall of each double-hole shaft sleeve is in sliding fit with the inner wall of the driving oil cavity, one side, away from the output gear, of each double-hole shaft sleeve is provided with a sealing groove II, four oil discharging ports are arranged on the periphery of each sealing groove II, two symmetrical oil discharging straight grooves are formed in the outer arc surfaces of the double-hole shaft sleeves, the oil discharging straight grooves are arranged on the bisection plane of the upper height and the lower height of the driving oil cavity, one end of each oil discharging straight groove is communicated with the sealing groove II, the other end of each oil discharging straight groove is communicated with a space between the two groups of double-hole shaft sleeves, the sealing grooves II and the oil discharging ports are internally clamped with a sealing ring II and a tetrafluoroethylene gasket, and the tetrafluoroethylene gasket covers the sealing ring II;

the shaft shoulders with the diameter of 1-2mm are arranged at the orifices on the two sides of the double-hole shaft sleeve, so that small gaps are respectively reserved between the double-hole shaft sleeve and the output gear and the slave gear, the output shaft and the slave shaft are not blocked by friction of the end surface of the double-hole shaft sleeve and can smoothly rotate, when the driving oil cavity has certain oil pressure, hydraulic oil near the output gear or the slave gear can be guided into the sealing groove II and the oil discharge straight groove through the oil discharge port, the sealing ring II can be promoted to expand by being guided into the sealing groove II, thereby applying tetrafluoroethylene gasket expansion thrust, ensuring that the two groups of double-hole shaft sleeves respectively carry out abutting sealing on the inner walls of the shell and the sealing cover, and further improving the sealing performance of the cavity structure of the whole hydraulic driving gear;

the top surface of the shell is sequentially provided with an oil inlet, an overflow valve mounting hole and a solenoid valve mounting hole from front to back, the solenoid valve is sleeved in the solenoid valve mounting hole, the bottom end of the oil inlet is communicated with the side part of the oil inlet hole groove, one end of the oil inlet hole groove is communicated with the side part of the solenoid valve mounting hole through a round hole, the rear end surface of the shell is also provided with a transition cavity, the bottom end of the solenoid valve mounting hole is communicated with one side of the transition cavity, the bottom end of the overflow valve mounting hole is communicated with the side part of the oil inlet hole groove, an overflow hole is arranged between the oil inlet hole groove and the transition cavity, the bottom end of a one-way overflow valve penetrates through the overflow valve mounting hole and extends into the overflow hole, the opening part of the transition cavity is provided with a first plug, one end of the transition cavity, far away from the first plug is communicated with one end of the oil outlet hole groove, a throttling column is arranged at the communication part of the transition cavity and the oil outlet hole groove, the bottom surface of the shell is sequentially provided with a test port and an oil outlet hole groove from front to back, the top end of the test port is communicated with the oil outlet groove side part, the opening is provided with a second plug, the oil outlet and the transition cavity, the oil outlet and the oil inlet are respectively provided with a pipe joint, the oil inlet pipe joint, the high-pressure oil inlet pipe, and the low-pressure oil outlet pipe are connected with the low-pressure oil outlet pipe;

the oil inlet, the overflow valve mounting hole, the solenoid valve mounting hole, the transition cavity, the test port and the port part of the oil outlet are all provided with threaded inner walls, the solenoid valve, the one-way overflow valve, the pipe joint, the first plug and the second plug are respectively sleeved and mounted in place through threads, and the solenoid valve, the one-way overflow valve, the pipe joint, the first plug and the second plug are all sleeved with rubber gaskets for sealing the positions of the port parts and keeping the integral sealing performance of the shell;

the outer wall of the throttling column is a threaded wall, a screw hole in threaded fit with the throttling column is formed in the communication position of the transition cavity and the oil outlet hole groove, a throttling hole is formed in the throttling column and comprises a hexagonal prism hole section connected with the transition cavity and a cylindrical hole section connected with the oil outlet hole groove, the inner diameter of the hexagonal prism hole section is larger than that of the cylindrical hole section, the opening of the hexagonal prism hole section is located in the position close to the opening of one end of the overflow hole, so that the outlet pressure value of the throttling column is close to the pressure value of one end of the overflow hole, the hexagonal prism hole section is used for placing a screwdriver to screw the throttling column tightly, the cylindrical hole section is used for limiting current to control the pressure difference of two ends of the overflow hole, overload is prevented, the normal work of the motor is guaranteed, the starting hydraulic pressure of an output shaft can be improved, the starting stability is improved, and the downtime is reduced;

the electromagnetic valve is specifically a temperature control electromagnetic valve and comprises a main valve body, the main valve body is sleeved in an electromagnetic valve mounting hole, the outer end face of the main valve body is fixedly connected with a connecting column, the connecting column is fixedly sleeved with an electromagnetic coil, one end of the connecting column is sealed by a nut, and the electromagnetic coil controls the opening or closing of the electromagnetic valve according to the oil temperature; the specific model of the temperature control electromagnetic valve is preferably a DASV08-28 threaded cartridge type small electromagnetic valve, wherein an electromagnetic coil is electrically connected with a temperature control unit of the hydraulic system, the temperature of oil in the hydraulic system is measured according to a temperature sensor, and a temperature control target temperature range is set as follows: the optimal working temperature of the hydraulic oil is between 60 and 80 ℃, when the optimal working temperature is higher than the range, the electromagnetic valve needs to be closed to start the output shaft to rotate, and one end of the output shaft is fixedly provided with the fan, so that the temperature of the hydraulic system is reduced, when the temperature reaches or is lower than the working temperature, the electromagnetic valve needs to be opened to stop the output shaft to rotate, and the effect of controlling the temperature to start and stop is realized through the electromagnetic valve;

the one-way overflow valve comprises an external thread pipe section sleeved in an overflow valve mounting hole, one end of the external thread pipe section is fixedly connected with a positioning sheet, a connecting part of the external thread pipe section and the positioning sheet is provided with an annular groove, a circular rubber ring is sleeved in the annular groove, one side of the positioning sheet far away from the external thread pipe section is fixedly connected with an outer hexagon nut, the device is used for tightly mounting an external thread pipe section, the inner wall of the external thread pipe section is smooth and is sleeved with a round block, one port part of the external thread pipe section, which is far away from a positioning sheet, is subjected to diameter reduction treatment through pressure riveting, the inner diameter of one port part of the external thread pipe section, which is far away from the positioning sheet, is smaller than the outer diameter of the round block, the clamping effect is achieved, a spring clamping column is fixedly connected to the center of one side, which is close to the positioning sheet, of the round block, a low-pressure soft spring is sleeved on the spring clamping column, the compression and extension triggering pressure of the low-pressure soft spring is 0.1-0.2MPa, the device is used for controlling and buffering the sliding of a round block, a connecting rod is fixedly connected to the center of one side, away from a positioning sheet, of the round block, an inverted conical cap head is fixedly connected to one end, away from the round block, of the connecting rod, a high-pressure hard spring and an oil unloading block are sleeved on the connecting rod, the compression and stretching trigger pressure of the high-pressure hard spring is 4-10MPa, the high-pressure hard spring is arranged between the round block and the oil unloading block, the oil unloading block consists of a hexagonal prism section and a spherical section, the outer wall of the hexagonal prism section is internally tangent to the inner wall of an overflow hole, one end face of the spherical section is fixedly connected with the hexagonal prism section and forms a circular connecting edge, the circular connecting edge is hermetically sealed and connected in the overflow hole, the inner cavity aperture of the oil unloading block is larger than the outer diameter of the connecting rod, and an inner cavity hole of the oil unloading block and the connecting rod form an oil unloading channel, the other end surface of the spherical section is in sealing contact with the back surface of the inverted conical cap head, one end of the oil unloading channel is blocked by the end closure of the back surface of the inverted conical cap head, and the outer wall of the hexagonal prism section is provided with an oil unloading hole communicated with the oil unloading channel.

Preferably, the nut part of the long screw is provided with an inner hexagonal prism groove, and an anti-slip gasket is arranged between the nut part of the long screw and the rear end face of the shell.

Preferably, an oil seal gasket is arranged on the outer side of the bearing, and the sealing performance of the output shaft is guaranteed.

The machining and installation process of the integrated motor with the overload automatic unloading function comprises the following steps:

a. processing the shell: finishing the whole body of the shell, machining a driving oil cavity, an oil inlet hole groove, an oil outlet hole groove, a sealing groove I and a pin hole on the front end surface of the shell, drilling a long screw hole, and forming circular grooves which are movably clamped with the output shaft and the slave shaft respectively on the inner plane of the driving oil cavity;

an oil inlet, an overflow valve mounting hole and a solenoid valve mounting hole are formed in the top surface of the shell, the overflow hole is milled by feeding from the overflow valve mounting hole, an oil inlet hole groove is extended to the position close to the solenoid valve mounting hole, and the oil outlet hole groove and the solenoid valve mounting hole are drilled from a feed milling round hole of the oil inlet hole groove;

a transition cavity is formed in the rear end face of the shell, the thickness of the throttling column is reserved between the transition cavity and the oil outlet groove, and a screw hole matched with the throttling column is formed by feeding and tapping from the transition cavity;

a test port and an oil outlet are formed in the bottom surface of the shell;

b. processing the sealing cover: finely processing the whole sealing cover, milling a pin hole on the inner side surface of the sealing cover, tapping a short screw hole, and mounting a bearing;

c. processing and mounting the throttling column: selecting a cast iron plug with external threads, punching a hexagonal prism hole section on one end surface of the cast iron plug through die punching, milling a cylindrical hole section on the other end surface of the cast iron plug, punching the cylindrical hole section and the hexagonal prism hole section, adding a throttling column from a transition cavity, and screwing the throttling column into a corresponding screw hole by adopting a hexagonal screw head;

d. the total installation process: the output shaft, the slave shaft and the double-hole shaft sleeve are sequentially installed and placed in the driving oil cavity, the sealing cover is installed, the electromagnetic valve with the rubber gasket, the one-way overflow valve, the pipe joint, the first plug and the second plug are sequentially installed, and finally the sealing cover and the shell are fixedly installed in place through the installation lug plate and the bolt.

The use process of the integrated motor with the overload automatic unloading function is as follows:

a. when the electromagnetic valve is opened, the path of the hydraulic oil is as follows: the output shaft does not work at the moment;

b. in the test stage, an oil inlet and a test port are opened, a pipe joint is arranged at the test port, the oil inlet is connected with the high-pressure side of a hydraulic system, the test port is connected with the low-pressure side, and the rotation condition of an output shaft and the sealing performance of a shell are detected;

c. when the electromagnetic valve is closed, the electromagnetic valve is in an open state, hydraulic oil pushes the output gear and the slave gear to rotate from the high-pressure side of the oil inlet hole groove and gradually enters the low-pressure side of the oil outlet hole groove, the pressure difference between the oil inlet hole groove and the oil outlet hole groove at the initial stage drives the output shaft to rotate, the compression yield force of a high-pressure hard spring cannot be overcome, and the rotating speed of the output shaft is kept in a normal range;

d. the electromagnetic valve is kept closed, along with the increase of flow, the electromagnetic valve is influenced by the reducing throttling of the throttling column, when the pressure difference at two ends generated by the rotation of the gear is greater than the compressive yield force of the high-pressure hard spring, the gear is in an overload state at the moment, when the hydraulic pressure in the oil inlet hole groove overcomes the compressive yield force of the high-pressure hard spring, an overhigh positive pressure is generated to push the inverted conical cap head and the oil discharging block to be separated from the overflow hole and reach a transition cavity, so that the pressure oil for pushing the output gear and the slave gear to rotate is relatively reduced, the rotation speed of the output shaft is reduced, and the purpose of limiting the speed by overload is achieved; when the hydraulic pressure force after the oil inlet groove is decompressed is smaller than the compression yield force of the high-pressure hard spring, the inverted cone-shaped circular cap head is combined with the oil unloading block and returns to the overflow hole, the one-way overflow valve is closed at the moment, and the path of the hydraulic oil is changed again: the output shaft returns to a normal rotating speed running state, so that the functions of overload speed reduction and normal rotating speed recovery after pressure relief are realized;

e. the electromagnetic valve is kept closed, the oil inlet and the oil outlet are in a forced closed state, the output shaft still rotates in inertia, oil in the oil inlet hole groove is continuously and directly led into the oil outlet hole groove, the vacuum air column phenomenon of the oil inlet hole groove can be caused if the oil is not processed, the pressure of the oil outlet hole groove is gradually increased, the output shaft is gradually decelerated through the blocking effect of the throttling column, the oil is influenced by the reducing throttling of the throttling column, the hydraulic pressure in the transition cavity is larger than the pressure in the oil inlet hole groove, the reverse pressure difference pushes the inverted cone-shaped round cap head and the oil unloading block, the low-pressure soft spring is highly compressed, the oil unloading block is leaked out of the overflow hole, the oil in the transition cavity returns to the oil inlet hole groove under the driving of the reverse pressure difference, the oil is supplemented, a feedback route is formed until the pressure in the whole shell tends to be balanced, the output shaft does not run any more, the shutdown time of the output shaft is reduced, and the vacuum air column phenomenon which can occur is eliminated.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention adopts a shell which is easy to process and convenient to install as a carrier, and adopts a simple plug-in mounting mode to mount a control valve element, a gear pump element and an output shaft structure into the shell to form an integrated motor with a novel structure, which not only bears the function of the motor in the common sense, but also converts the kinetic energy of high-pressure oil into the mechanical energy of the rotation of a rotating shaft and can bear the control function of a system executive element;

2. the invention designs a throttling column and a one-way overflow valve structure with characteristics by locally optimizing the existing one-way overflow valve, throttling hole, electromagnetic valve and other structures, plays a role of pressure-relieving soft start when starting up, realizes the functions of automatic unloading of overload and temperature control start and stop when overload occurs, can reduce the stop time of an output shaft when stopping, and eliminates the phenomenon of a vacuum air column which may occur.

3. The invention also optimizes the sealing of the output shaft through the double-hole shaft sleeve and the sealing structure thereof, and leads oil at the joint to generate a relatively coherent oil film, thereby further improving the sealing property and avoiding oil leakage and power loss.

Drawings

Fig. 1 is a perspective view of an integrated motor with an overload automatic unloading function according to the present invention;

fig. 2 is an assembly structure view of a perspective view of an integrated motor with an overload automatic unloading function according to the present invention;

fig. 3 is a mounting structure diagram of an electromagnetic valve in an integrated motor with an overload automatic unloading function according to the present invention;

fig. 4 is a perspective view of a one-way overflow valve in an integrated motor with an overload automatic unloading function according to the present invention;

FIG. 5 is an internal structure view of a one-way relief valve in an integrated motor with automatic overload unloading function according to the present invention;

fig. 6 is a cross-sectional view of a throttle column in an integrated motor with an automatic overload unloading function according to the present invention;

FIG. 7 is a sealing structure diagram of a double-hole shaft sleeve in an integrated motor with an overload automatic unloading function according to the present invention;

fig. 8 is a machined hole structure of a shell in an integrated motor with an overload automatic unloading function according to the present invention;

fig. 9 is a schematic view illustrating installation of a machining hole of a housing in an integrated motor with an automatic overload unloading function according to the present invention;

FIG. 10 is a first hydraulic schematic diagram (solenoid valve normally closed state) of the present invention;

FIG. 11 is a second hydraulic schematic diagram (solenoid valve normally open) of the present invention;

in the figure: the hydraulic control device comprises a shell 1, a driving oil cavity 101, an oil inlet hole groove 102, an oil outlet hole groove 103, a sealing groove I104, a pin hole 105, a long screw hole 106, an oil inlet 107, an overflow valve mounting hole 108, a solenoid valve mounting hole 109, a transition cavity 110, an overflow hole 111, a test hole 112, an oil outlet 113, a sealing cover 2, a solenoid valve 3, a one-way overflow valve 4, an externally threaded pipe section 401, a positioning sheet 402, a circular rubber ring 403, an outer hexagon nut 404, a round block 405, a spring clamping column 406, a low-pressure soft spring 407, a connecting rod 408, an inverted conical round cap head 409, a high-pressure hard spring 410, an oil discharging block 411, an oil discharging channel 412, an oil discharging hole 413, an output gear 5, a slave gear 6, a sealing ring I7, a positioning pin 8, a long screw 9, a short screw hole 10, an output shaft 11, a slave shaft 12, a bearing hole 13, a bearing 14, a mounting lug plate 15, a double-hole shaft sleeve 16, a sealing groove II17, an oil discharging port 18, an oil discharging straight oil discharging groove 19, a sealing ring II20, a tetrafluoroethylene gasket 21, a first plug 22, a throttling column 23 and a second sealing ring 24.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-9, an integrated motor with an overload automatic unloading function comprises a shell 1, a sealing cover 2 installed at the front end of the shell 1, and an electromagnetic valve 3 and a one-way overflow valve 4 inserted in the shell 1, wherein a driving oil cavity 101 hermetically sleeved with an output gear 5 and a slave gear 6 is formed in the front end face of the shell 1, the driving oil cavity 101 is specifically a horizontally-placed 8-shaped spindle cavity structure, an oil inlet hole groove 102 is communicated above the central part of the driving oil cavity 101, an oil outlet hole groove 103 is communicated below the central part of the driving oil cavity 101, the oil inlet hole groove 102 and the oil outlet hole groove 103 are symmetrically distributed along the driving oil cavity 101, and the oil inlet hole groove 102, the oil outlet hole groove 103 and the driving oil cavity 101 form a cavity structure with a four-petal-shaped cross section; the front end face of the shell 1 is positioned outside the four-petal-shaped cavity structure and is provided with a sealing groove I104, a sealing ring I7 is clamped in the sealing groove I104, the front end face of the shell 1 is positioned outside the sealing groove I104 and is provided with pin holes 105 and long screw holes 106, the two groups of pin holes 105 are centrosymmetric, one side, close to the shell 1, of the sealing cover 2 is also provided with corresponding pin holes 105, the two groups of corresponding pin holes 105 are clamped with positioning pins 8, the four groups of long screw holes 106 are distributed in a rectangular shape, the long screw holes 106 penetrate through the front end face and the rear end face of the shell 1, long screws 9 are matched in the long screw holes 106, one side, close to the shell 1, of the sealing cover 2 is provided with short screw holes 10 in threaded fit with one ends of the long screws 9, and the other ends of the long screws 9 extend to the rear end face of the shell 1 and are fixedly provided with screw cap parts; the output gear 5 and the slave gear 6 are meshed with each other, the outer contours of the output gear 5 and the slave gear 6 are respectively sealed with the inner side wall of the driving oil cavity 101 through an oil film of hydraulic oil, the output gear 5 is fixedly sleeved in the middle of the output shaft 11, the slave gear 6 is fixedly sleeved in the middle of the slave shaft 12, the driving oil cavity 101 is provided with circular grooves movably clamped with the output shaft 11 and the slave shaft 12 respectively, one side, close to the shell 1, of the sealing cover 2 is provided with a circular groove movably clamped with the slave shaft 12, the middle of the sealing cover 2 is provided with a bearing hole 13, the bearing hole 13 is in interference clamping connection with the outer ring wall of the bearing 14, the inner ring wall of the bearing 14 is in transition fit clamping connection with the output shaft 11, one side, far away from the shell 1, of the sealing cover 2 is fixedly connected with an installation lug plate 15, and two sides of the installation lug plate 15 are provided with symmetrical U-shaped positioning grooves for fixedly installing the sealing cover 2 and the shell 1; the output shaft 11 and the slave shaft 12 are connected with each other through two groups of double-hole shaft sleeves 16, the output gear 5 and the slave gear 6 are both positioned between the two groups of double-hole shaft sleeves 16, the double-hole shaft sleeves 16 are specifically of 8-shaped shaft sleeve structures with two shaft holes, the outer wall of each double-hole shaft sleeve 16 is in sliding fit with the inner side wall of the driving oil cavity 101, one side, away from the output gear 5, of each double-hole shaft sleeve 16 is provided with a sealing groove II17, four oil discharge ports 18 are formed in the periphery of each sealing groove II17, the outer arc surface of each double-hole shaft sleeve 16 is provided with two symmetrical oil discharge straight grooves 19, each oil discharge straight groove 19 is arranged on a bisection plane of the upper height and the lower height of the driving oil cavity 101, one end of each oil discharge straight groove 19 is communicated with the corresponding sealing groove II17, the other end of each oil discharge straight groove 19 is communicated with a space between the two groups of double-hole shaft sleeves 16, a sealing ring II20 and a tetrafluoroethylene gasket 21 are clamped in each sealing groove II17 and each oil discharge port 18, and the tetrafluoroethylene gasket 21 covers the outside the sealing ring II 20; the orifices on the two sides of the double-hole shaft sleeve 16 are provided with shaft shoulders of 1-2mm, so that small gaps are respectively reserved between the double-hole shaft sleeve 16 and the output gear 5 and the slave gear 6, the output shaft 11 and the slave shaft 12 are not blocked by friction of the end surface of the double-hole shaft sleeve 16 and can smoothly rotate, when the driving oil cavity 101 has certain oil pressure, hydraulic oil near the output gear 5 or the slave gear 6 can be guided into the seal groove II17 and the oil discharge straight groove 19 through the oil discharge port 18, the seal groove II20 can be expanded by guiding the hydraulic oil into the seal groove II17, and then the expansion thrust of the tetrafluoroethylene gasket 21 is applied, so that the two groups of double-hole shaft sleeves 16 are respectively abutted and sealed against the inner walls of the shell 1 and the seal cover 2, and the sealing performance of the cavity structure of the whole hydraulic driving gear is further improved; an oil inlet 107, an overflow valve mounting hole 108 and an electromagnetic valve mounting hole 109 are sequentially formed in the top surface of the shell 1 from front to back, the electromagnetic valve 3 is sleeved in the electromagnetic valve mounting hole 109, the bottom end of the oil inlet 107 is communicated with the side portion of the oil inlet hole 102, one end of the oil inlet hole 102 is communicated with the side portion of the electromagnetic valve mounting hole 109 through a circular hole, a transition cavity 110 is further formed in the back end surface of the shell 1, the bottom end of the electromagnetic valve mounting hole 109 is communicated with one side of the transition cavity 110, the bottom end of the overflow valve mounting hole 108 is communicated with the side portion of the oil inlet hole 102, an overflow hole 111 is formed between the oil inlet hole 102 and the transition cavity 110, the bottom end of the one-way overflow valve 4 penetrates through the overflow valve mounting hole 108 and extends into the overflow hole 111, a first plug 22 is arranged at the opening of the transition cavity 110, one end, far away from the first plug 22, of the transition cavity 110 is communicated with one end of the oil outlet hole 103, a throttling column 23 is arranged at the communication position of the transition cavity 110 and the oil outlet hole 103, a test port 112 and an oil outlet 113 are sequentially formed in the bottom surface of the shell 1 from front to back, the bottom surface of the test port 112 is communicated with the oil outlet hole 103, a second plug 24 is arranged at the side portion of the test port 112, the top end 113 of the oil outlet port 113 is communicated with the transition cavity 110, the transition cavity 107, a high-pressure oil pipe joint 107 and a low-pressure pipe joint 113 is arranged at the oil inlet pipe joint 107, the oil inlet pipe joint 113, the oil inlet pipe joint 107, and the oil inlet 113, and the oil outlet 107, and the low pressure pipe joint 113, and the oil pipe joint 113, the oil inlet pipe joint 107; the mouth parts of the oil inlet 107, the overflow valve mounting hole 108, the electromagnetic valve mounting hole 109, the transition cavity 110, the test port 112 and the oil outlet 113 are all provided with threaded inner walls, the electromagnetic valve 3, the one-way overflow valve 4, the pipe joint, the first plug 22 and the second plug 24 are respectively sleeved and mounted in place through threads, and the electromagnetic valve 3, the one-way overflow valve 4, the pipe joint, the first plug 22 and the second plug 24 are all sleeved and connected with rubber gaskets for sealing the positions of the mouth parts and keeping the overall sealing performance of the shell 1; the outer wall of the throttling column 23 is a threaded wall, a screw hole in threaded fit with the throttling column 23 is formed in the communication position of the transition cavity 110 and the oil outlet groove 103, a throttling hole is formed in the throttling column 23 and comprises a hexagonal prism hole section connected with the transition cavity 110 and a cylindrical hole section connected with the oil outlet groove 103, the inner diameter of the hexagonal prism hole section is larger than that of the cylindrical hole section, the opening part of the hexagonal prism hole section is located near the opening part of one end of the overflow hole 111, so that the pressure value of the outlet of the throttling column 23 is close to that of one end of the overflow hole 111, the hexagonal prism hole section is used for placing a screwdriver to screw the throttling column 23 tightly, the cylindrical hole section is used for limiting current to control the pressure difference of the two ends of the overflow hole 111, overload is prevented, the normal work of the motor is guaranteed, the starting liquid pressure of the output shaft 11 can be improved, the opening stability is improved, and the downtime is reduced; the electromagnetic valve 3 is specifically a temperature control electromagnetic valve, the electromagnetic valve 3 comprises a main valve body, the main valve body is sleeved in an electromagnetic valve mounting hole 109, a connecting column is fixedly connected to the outer end face of the main valve body, an electromagnetic coil is fixedly sleeved on the connecting column, one end of the connecting column is sealed by a nut, and the electromagnetic coil controls the opening or closing of the electromagnetic valve 3 according to the oil temperature; the one-way overflow valve 4 comprises an external thread pipe section 401 sleeved in an overflow valve mounting hole 108, one end of the external thread pipe section 401 is fixedly connected with a positioning sheet 402, an annular groove is arranged at the joint of the external thread pipe section 401 and the positioning sheet 402, a circular rubber ring 403 is sleeved in the annular groove, one side of the positioning sheet 402 far away from the external thread pipe section 401 is fixedly connected with an outer hexagonal nut 404 for tightly fixing and mounting the external thread pipe section 401, the inner wall of the external thread pipe section 401 is smooth and sleeved with a round block 405, one end opening part of the external thread pipe section 401 far away from the positioning sheet 402 is subjected to diameter reduction treatment through riveting, the inner diameter of one end opening part of the external thread pipe section 401 far away from the positioning sheet 402 is smaller than the outer diameter of the round block 405 for clamping, a spring clamping column 406 is fixedly connected to the center of one side of the round block 405 close to the positioning sheet 402, a low-pressure soft spring 407 is sleeved on the spring clamping column 406, the compression and extension triggering pressure of the low-pressure soft spring 407 is 0.1-0.2MPa, used for controlling and buffering the sliding of the round block 405, a connecting rod 408 is fixedly connected with the center of one side of the round block 405 far away from the positioning sheet 402, an inverted cone-shaped cap head 409 is fixedly connected with one end of the connecting rod 408 far away from the round block 405, the connecting rod 408 is sleeved with a high-pressure hard spring 410 and an oil discharging block 411, the compression and tension triggering pressure of the high-pressure hard spring 410 is 4-10MPa, the high-pressure hard spring 410 is arranged between the round block 405 and the oil discharging block 411, the oil discharging block 411 is composed of a hexagonal prism section and a spherical section, the outer wall of the hexagonal prism section is internally tangent to the inner wall of the overflow hole 111, one end face of the spherical section is fixedly connected with the hexagonal prism section and forms a circular connecting edge, the circular connecting edge is hermetically sleeved in the overflow hole 111, the aperture of the inner cavity of the oil discharging block 411 is larger than the outer diameter of the connecting rod 408, the inner cavity of the oil discharging block 411 and the connecting rod 408 form an oil discharging channel 412, the other end face of the spherical section is in sealing contact with the back face of the inverted cone-shaped cap head 409, one end of the oil discharge passage 412 is blocked by the end sealing of the back of the inverted conical cap head 409, and the outer wall of the hexagonal prism section is provided with an oil discharge hole 413 communicated with the oil discharge passage 412.

Referring to fig. 2, the cap portion of the long screw 9 is provided with a hexagonal socket, and an anti-slip washer is provided between the cap portion of the long screw 9 and the rear end surface of the case 1.

Referring to fig. 2, an oil seal gasket is provided outside the bearing 14 to ensure the sealing performance of the output shaft 11.

a. processing of the shell 1: finishing the whole body of the shell 1, machining a driving oil cavity 101, an oil inlet hole groove 102, an oil outlet hole groove 103, a sealing groove I104 and a pin hole 105 on the front end surface of the shell, drilling a long screw hole 106, and forming circular grooves which are movably clamped with the output shaft 11 and the slave shaft 12 respectively in the driving oil cavity 101;

an oil inlet 107, an overflow valve mounting hole 108 and an electromagnetic valve mounting hole 109 are formed in the top surface of the shell 1, an overflow hole 111 is milled from the overflow valve mounting hole 108 by feeding, the oil inlet hole groove 102 is extended to the position near the electromagnetic valve mounting hole 109, and the oil outlet hole groove 103 and the electromagnetic valve mounting hole 109 are drilled from a circular hole milled from the oil inlet hole groove 102 by feeding;

a transition cavity 110 is formed in the rear end face of the shell 1, the thickness of the throttling column 23 is reserved between the transition cavity 110 and the oil outlet hole 103, and a screw hole matched with the throttling column 23 is formed by feeding and tapping from the transition cavity 110;

a test port 112 and an oil outlet 113 are arranged on the bottom surface of the shell 1;

b. processing of the sealing cover 2: finishing the whole sealing cover 2, milling a pin hole 105 on the inner side surface of the sealing cover, tapping a short screw hole 10, and installing a bearing 14;

c. machining and installing the throttling column 23: selecting a cast iron plug with external threads, punching a hexagonal prism hole section on one end surface of the cast iron plug through die punching, milling a cylindrical hole section on the other end surface of the cast iron plug, punching the cylindrical hole section and the hexagonal prism hole section, adding the throttling column 23 from the transition cavity 110, and screwing the throttling column 23 into a corresponding screw hole by adopting a hexagonal screw head;

d. the total installation process: the output shaft 11, the slave shaft 12 and the double-hole shaft sleeve 16 are sequentially installed and placed in the driving oil cavity 101, the sealing cover 2 is installed, the electromagnetic valve 3 with a rubber gasket, the one-way overflow valve 4, the pipe joint, the first plug 22 and the second plug 24 are sequentially installed, and finally the sealing cover 2 and the shell 1 are fixedly installed in place through the installation lug plate 15 and the bolts.

a. when the electromagnetic valve 3 is opened, the path of the hydraulic oil is as follows: an oil inlet 107, an oil inlet hole groove 102, an electromagnetic valve 3, a transition cavity 110 and an oil outlet 113, wherein the output shaft 11 does not work at the moment;

b. in the test stage, the oil inlet 107 and the test port 112 are opened, a pipe joint is arranged at the test port 112, the oil inlet 107 is connected with the high-pressure side of the hydraulic system, the test port 112 is connected with the low-pressure side, and the rotation condition of the output shaft 11 and the sealing performance of the shell 1 are detected;

c. when the electromagnetic valve 3 is closed, in an open state, hydraulic oil pushes the output gear 5 and the slave gear 6 to rotate from the high-pressure side of the oil inlet hole groove 102 and gradually enters the low-pressure side of the oil outlet hole groove 103, the pressure difference between the oil inlet hole groove 102 and the oil outlet hole groove 103 at the initial stage drives the output shaft to rotate, the compression yield force of the high-pressure hard spring 410 is not enough to overcome, and the rotating speed of the output shaft 11 is kept in a normal range;

d. keeping the electromagnetic valve 3 closed, along with the increase of the flow, under the influence of the reducing throttling of the throttling column 23, when the pressure difference at two ends generated by the rotation of the gear is greater than the compressive yield force of the high-pressure hard spring 410, at the moment, the gear is in an overload state, when the hydraulic pressure in the oil inlet hole groove 102 overcomes the compressive yield force of the high-pressure hard spring 410, an over-high positive pressure is generated to push the inverted conical cap head 409 and the oil discharge block 411 to be separated from the overflow hole 111 and reach the transition cavity 110, so that the pressure oil for pushing the output gear 5 and the slave gear 6 to rotate is relatively reduced, the rotating speed of the output shaft 11 is reduced, and the purpose of overload speed limitation is achieved; when the hydraulic pressure of the oil inlet hole groove 102 after pressure relief is smaller than the compression yield force of the high-pressure hard spring 410, the inverted cone-shaped cap head 409 is jointed with the oil discharging block 411 and returns to the overflow hole 111, at the moment, the one-way overflow valve 4 is closed, and the path of the hydraulic oil is changed again: the output shaft 11 recovers to a normal rotating speed running state through the oil inlet hole groove 102, the driving oil cavity 101, the oil outlet hole groove 103, the throttling hole and the transition cavity 110, so that the functions of overload speed reduction and normal rotating speed recovery after pressure relief are realized;

e. keeping the electromagnetic valve 3 closed, closing the oil inlet 107 and the oil outlet 113, entering a forced closed state, the output shaft 11 still inertially rotates, continuously and directly guiding the oil in the oil inlet hole groove 102 into the oil outlet hole groove 103, at this time, if the oil is not processed, causing a vacuum air column phenomenon of the oil inlet hole groove 102, gradually increasing the pressure of the oil outlet hole groove 103, gradually decelerating the output shaft 11 through the blocking effect of the throttling column 23, and being influenced by the reducing throttling of the throttling column 23, the hydraulic pressure in the transition cavity 110 is greater than the pressure in the oil inlet hole groove 102, the back pressure difference pushes the inverted cone-shaped round cap head 409 and the oil unloading block 411, and the low-pressure soft spring 407 is highly compressed, so that the oil unloading block 411 leaks out of the overflow hole 111, the oil in the transition cavity 110 returns to the oil inlet hole groove 102 under the back pressure difference driving, completing oil supplement, forming a feedback route, until the pressure in the whole shell 1 tends to be balanced, and the output shaft 11 does not run again, thereby reducing the downtime of the output shaft 11 and eliminating the vacuum air column phenomenon which may occur.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.

Claims

1. An integrated motor with an overload automatic unloading function comprises a shell (1), a sealing cover (2) installed at the front end of the shell (1), and an electromagnetic valve (3) and a one-way overflow valve (4) which are inserted in the shell (1), and is characterized in that a driving oil cavity (101) which is hermetically sleeved with an output gear (5) and a slave gear (6) is formed in the front end face of the shell (1), the driving oil cavity (101) is specifically of a horizontally-placed 8-shaped spindle cavity structure, an oil inlet hole groove (102) is communicated above the central part of the driving oil cavity (101), an oil outlet hole groove (103) is communicated below the central part of the driving oil cavity (101), the oil inlet hole groove (102) and the oil outlet hole groove (103) are symmetrically distributed along the driving oil cavity (101), and the oil inlet hole groove (102), the oil outlet hole groove (103) and the driving oil cavity (101) form a cavity structure with a four-petal-shaped cross section;

the sealing structure is characterized in that a sealing groove I (104) is formed in the position, located outside a four-petal-shaped cavity structure, of the front end face of the shell (1), a sealing ring I (7) is connected in a clamping mode in the sealing groove I (104), pin holes (105) and long screw holes (106) are formed in the position, located outside the sealing groove I (104), of the front end face of the shell (1), two groups of pin holes (105) are centrosymmetric, one side, close to the shell (1), of the sealing cover (2) is also provided with corresponding pin holes (105), two groups of corresponding pin holes (105) are connected with positioning pins (8) in a clamping mode, four groups of long screw holes (106) are distributed in a rectangular mode, the long screw holes (106) penetrate through the front end face and the rear end face of the shell (1), long screws (9) are matched in the long screw holes (106), one side, close to the shell (1), of the sealing cover (2) is provided with short screw holes (10) in threaded fit with one ends of the long screws (9), and the other ends of the long screws (9) extend to the rear end face of the shell (1) and are fixedly provided with screw caps;

the output gear (5) and the slave gear (6) are meshed with each other, the outer contours of the output gear (5) and the slave gear (6) are respectively sealed with the inner side wall of the driving oil cavity (101) through an oil film of hydraulic oil, the output gear (5) is fixedly sleeved in the middle of the output shaft (11), the slave gear (6) is fixedly sleeved in the middle of the slave shaft (12), the driving oil cavity (101) is provided with a circular groove which is movably clamped with the output shaft (11) and the slave shaft (12) respectively, one side, close to the shell (1), of the sealing cover (2) is provided with a circular groove which is movably clamped with the slave shaft (12), the middle of the sealing cover (2) is provided with a bearing hole (13), the bearing hole (13) is in interference clamped connection with the outer ring wall of the bearing (14), the inner ring wall of the bearing (14) is in transition fit clamping connection with the output shaft (11), one side, far away from the shell (1), of the sealing cover (2) is fixedly connected with an installation lug plate (15), and two sides of the installation lug plates (15) are provided with symmetrical U-shaped positioning grooves for fixedly installing the sealing cover (2) and the shell (1);

the output shaft (11) and the slave shaft (12) are connected with each other through two groups of double-hole shaft sleeves (16), the output gear (5) and the slave gear (6) are located between the two groups of double-hole shaft sleeves (16), the double-hole shaft sleeves (16) are of 8-shaped shaft sleeve structures with two shaft holes, the outer wall of each double-hole shaft sleeve (16) is in sliding fit with the inner side wall of the driving oil cavity (101), one side, far away from the output gear (5), of each double-hole shaft sleeve (16) is provided with a sealing groove II (17), four oil discharging ports (18) are formed in the periphery of each sealing groove II (17), two symmetrical oil discharging straight grooves (19) are formed in the outer arc surface of each double-hole shaft sleeve (16), the oil discharging straight grooves (19) are formed in the plane of the upper height and the lower height of the driving oil cavity (101), one end of each oil discharging straight groove (19) is communicated with a sealing groove II (17), the other end of each oil discharging straight groove (19) is communicated with a space between the two groups of double-hole shaft sleeves (16), the oil discharging straight grooves II (17) and a sealing ring (18) and a tetrafluoroethylene gasket (21) is connected with a tetrafluoroethylene gasket (20) and a tetrafluoroethylene gasket (ethylene gasket (20);

the sealing structure is characterized in that shaft shoulder parts of 1-2mm are arranged at orifices on two sides of the double-hole shaft sleeve (16), so that small gaps are formed among the double-hole shaft sleeve (16), the output gear (5) and the slave gear (6) respectively, the output shaft (11) and the slave shaft (12) are not blocked by friction of the end face of the double-hole shaft sleeve (16) and can rotate smoothly, when the driving oil cavity (101) has certain oil pressure, hydraulic oil near the output gear (5) or the slave gear (6) can be guided into the sealing groove II (17) and the oil discharging straight groove (19) through the oil discharging port (18), the sealing ring II (20) can be expanded by guiding the sealing groove II (17), expansion thrust of a tetrafluoroethylene gasket (21) is applied, the two groups of double-hole shaft sleeves (16) are guaranteed to respectively abut against the inner walls of the shell (1) and the sealing cover (2) tightly for sealing, and the sealing performance of the whole hydraulic driving gear cavity structure is further improved;

an oil inlet (107), an overflow valve mounting hole (108) and an electromagnetic valve mounting hole (109) are sequentially formed in the top surface of the shell (1) from front to back, the electromagnetic valve (3) is sleeved in the electromagnetic valve mounting hole (109), the bottom end of the oil inlet (107) is communicated with the side portion of the oil inlet hole groove (102), one end of the oil inlet hole groove (102) is communicated with the side portion of the electromagnetic valve mounting hole (109) through a circular hole, a transition cavity (110) is further formed in the rear end surface of the shell (1), the bottom end of the electromagnetic valve mounting hole (109) is communicated with one side of the transition cavity (110), the bottom end of the overflow valve mounting hole (108) is communicated with the side portion of the oil inlet hole groove (102), an overflow hole (111) is formed between the oil inlet hole groove (102) and the transition cavity (110), the bottom end of the one-way overflow valve (4) penetrates through the overflow valve mounting hole (108) and extends into the overflow hole (111), a first plug (22) is arranged at the opening of the transition cavity (110), one end of the transition cavity (110) is communicated with one end of the oil outlet hole (103), a self-flow-column (110) is sequentially formed at the bottom surface of the transition cavity (110), and the bottom surface (113) of the shell (1), the top end of the test port (112) is communicated with the side part of the oil outlet hole groove (103), a second plug (24) is arranged at the opening part of the test port (112), the top end of the oil outlet (113) is communicated with the side part of the transition cavity (110), pipe joints are respectively arranged on the oil outlet (113) and the oil inlet (107), the pipe joint of the oil inlet (107) is connected with a high-pressure oil inlet pipe, and the pipe joint of the oil outlet (113) is connected with a low-pressure oil outlet pipe;

the oil inlet (107), the overflow valve mounting hole (108), the electromagnetic valve mounting hole (109), the transition cavity (110), the test port (112) and the oil outlet (113) are provided with threaded inner walls at the ports, the electromagnetic valve (3), the one-way overflow valve (4), the pipe joint, the first plug (22) and the second plug (24) are respectively installed in place through threaded sleeves, and the electromagnetic valve (3), the one-way overflow valve (4), the pipe joint, the first plug (22) and the second plug (24) are respectively sleeved with rubber gaskets for sealing the ports and keeping the overall sealing performance of the shell (1);

the outer wall of the throttling column (23) is a threaded wall, a screw hole in threaded fit with the throttling column (23) is formed in the communication position of the transition cavity (110) and the oil outlet groove (103), a throttling hole is formed in the throttling column (23), the throttling hole comprises a hexagonal prism hole section connected with the transition cavity (110) and a cylindrical hole section connected with the oil outlet groove (103), the inner diameter of the hexagonal prism hole section is larger than that of the cylindrical hole section, the opening part of the hexagonal prism hole section is located near the opening part of one end of the overflow hole (111), so that the outlet pressure value of the throttling column (23) is close to the pressure value of one end of the overflow hole (111), the hexagonal prism hole section is used for placing a screwdriver to screw down the throttling column (23), the cylindrical hole section is used for limiting current to control the pressure difference of two ends of the overflow hole (111), overload is prevented, the normal work of the motor is guaranteed, the hydraulic pressure of the output shaft (11) can be improved, the opening stability is improved, and the downtime is reduced;

the electromagnetic valve (3) is specifically a temperature control electromagnetic valve, the electromagnetic valve (3) comprises a main valve body, the main valve body is sleeved in an electromagnetic valve mounting hole (109), a connecting column is fixedly connected to the outer end face of the main valve body, an electromagnetic coil is fixedly sleeved on the connecting column, one end of the connecting column is sealed through a nut, and the electromagnetic coil controls the opening or closing of the electromagnetic valve (3) according to the oil temperature;

the one-way overflow valve (4) comprises an external thread pipe section (401) sleeved in an overflow valve mounting hole (108), a positioning sheet (402) is fixedly connected to one end of the external thread pipe section (401), an annular groove is formed in the joint of the external thread pipe section (401) and the positioning sheet (402), a circular rubber ring (403) is sleeved in the annular groove, an outer hexagon nut (404) is fixedly connected to one side, away from the external thread pipe section (401), of the positioning sheet (402) and used for tightly mounting the external thread pipe section (401), the inner wall of the external thread pipe section (401) is smooth and sleeved with a round block (405), an end opening portion, away from the positioning sheet (402), of the external thread pipe section (401) is riveted through pressing, the inner diameter of the end opening portion, away from the positioning sheet (402), of the external thread pipe section (401) is smaller than the outer diameter of the round block (405), a clamping effect is achieved, the round block (405) is fixedly connected to one side center, close to the positioning sheet (402), a spring clamping column (406) is fixedly connected to the end opening portion, the spring clamping column (406) is connected to one side, a low-pressure soft spring (407) is sleeved to the low-pressure soft spring (407), the compression and the tensile pressure of the soft spring (407) is 0.1-0.2.1 MPa, the connection rod (408), the connection rod (409) is used for controlling the slip connection of the reverse-0.2, the reverse-connection of the round block (409), the round block (409) and the sliding head (408), and the connecting rod (408) for controlling the round block (409) is fixedly connected to control the round block (405), the high-pressure hard spring (410) and the oil unloading block (411) are sleeved on the connecting rod (408), the compression and tensile triggering pressure of the high-pressure hard spring (410) is 4-10MPa, the high-pressure hard spring (410) is arranged between the round block (405) and the oil unloading block (411), the oil unloading block (411) is composed of a hexagonal prism section and a spherical section, the outer wall of the hexagonal prism section is internally tangent to the inner wall of the overflow hole (111), one end face of the spherical section is fixedly connected with the hexagonal prism section and forms a circular connecting edge, the circular connecting edge is hermetically connected in the overflow hole (111), the aperture of an inner cavity of the oil unloading block (411) is larger than the outer diameter of the connecting rod (408), the inner cavity of the oil unloading block (411) and the connecting rod (408) form an oil unloading channel (412), the other end face of the spherical section is in sealing contact with the back face of the inverted cone-shaped cap head (409), one end of the oil unloading channel (412) is blocked by the back face of the inverted cone-shaped cap head (409), and the outer wall of the hexagonal prism section is provided with an oil unloading hole (413) communicated with the oil unloading channel (412).

2. The integrated motor with the automatic unloading function during overload according to claim 1, wherein the nut portion of the long screw (9) is provided with an inner hexagonal prism groove, and an anti-skid gasket is arranged between the nut portion of the long screw (9) and the rear end face of the shell (1).

3. The integrated motor with the automatic overload unloading function according to claim 1, wherein an oil seal gasket is arranged on the outer side of the bearing (14) to ensure the sealing performance of the output shaft (11).

4. The integrated motor with the automatic unloading function during overload according to claim 1, is characterized in that the processing and installation processes are as follows:

a. processing of the shell (1): finishing to manufacture the whole body of the shell (1), machining a driving oil cavity (101), an oil inlet hole groove (102), an oil outlet hole groove (103), a sealing groove I (104) and a pin hole (105) on the front end surface of the shell, drilling a long screw hole (106), and forming circular grooves which are movably clamped with the output shaft (11) and the slave shaft (12) respectively in a plane in the driving oil cavity (101);

an oil inlet (107), an overflow valve mounting hole (108) and an electromagnetic valve mounting hole (109) are formed in the top surface of the shell (1), an overflow hole (111) is milled by feeding from the overflow valve mounting hole (108), an oil inlet hole groove (102) is extended to the position near the electromagnetic valve mounting hole (109), and an oil outlet hole groove (103) and the electromagnetic valve mounting hole (109) are drilled by feeding and milling a round hole from the oil inlet hole groove (102);

a transition cavity (110) is formed in the rear end face of the shell (1), the thickness of the throttling column (23) is reserved between the transition cavity (110) and the oil outlet groove (103), and a screw hole matched with the throttling column (23) is formed by feeding and tapping from the transition cavity (110);

a test port (112) and an oil outlet (113) are formed in the bottom surface of the shell (1);

b. processing of the sealing cover (2): finishing the whole sealing cover (2), milling a pin hole (105) on the inner side surface of the sealing cover, tapping a short screw hole (10), and installing a bearing (14);

c. machining and installing the throttling column (23): selecting a cast iron plug with external threads, punching a hexagonal prism hole section on one end surface of the cast iron plug through die punching, milling a cylindrical hole section on the other end surface of the cast iron plug, punching the cylindrical hole section and the hexagonal prism hole section, adding a throttling column (23) from a transition cavity (110), and screwing the throttling column (23) into a corresponding screw hole by adopting a hexagonal screw head;

d. the total installation process: the output shaft (11), the slave shaft (12) and the double-hole shaft sleeve (16) are sequentially installed and placed in the driving oil cavity (101), the sealing cover (2) is installed, the electromagnetic valve (3) with the rubber gasket, the one-way overflow valve (4), the pipe joint, the first plug (22) and the second plug (24) are sequentially installed, and finally the sealing cover (2) and the shell (1) are fixedly installed in place through the installation lug plate (15) and the bolts.

5. The integrated motor with the automatic overload unloading function according to claim 1 is characterized by comprising the following use processes:

a. when the electromagnetic valve (3) is opened, the path of the hydraulic oil is as follows: an oil inlet (107), an oil inlet hole groove (102), an electromagnetic valve (3), a transition cavity (110) and an oil outlet (113), and at the moment, an output shaft (11) does not work;

b. in the test stage, an oil inlet (107) and a test port (112) are opened, a pipe joint is installed at the test port (112), the oil inlet (107) is connected with the high-pressure side of a hydraulic system, the test port (112) is connected with the low-pressure side, and the rotation condition of an output shaft (11) and the sealing performance of a shell (1) are detected;

c. when the electromagnetic valve (3) is closed, in an open state, hydraulic oil pushes the output gear (5) and the slave gear (6) to rotate from the high-pressure side of the oil inlet hole groove (102) and gradually enters the low-pressure side of the oil outlet hole groove (103), the pressure difference between the oil inlet hole groove (102) and the oil outlet hole groove (103) in the initial stage drives the output shaft to rotate, the compression yield force of a high-pressure hard spring (410) is not enough overcome, and the rotating speed of the output shaft (11) is kept in a normal range;

d. keeping the electromagnetic valve (3) closed, along with the increase of flow, under the influence of the reducing throttling of the throttling column (23), when the pressure difference at two ends generated by the rotation of the gear is larger than the compression yield force of the high-pressure hard spring (410), the gear is in an overload state at the moment, when the hydraulic pressure in the oil inlet hole groove (102) overcomes the compression yield force of the high-pressure hard spring (410), and an overhigh positive pressure is generated to push the inverted cone-shaped cap head (409) and the oil discharging block (411) to be separated from the overflow hole (111) and reach the transition cavity (110), so that the pressure oil for pushing the output gear (5) and the slave gear (6) to rotate is relatively reduced, the rotating speed of the output shaft (11) is reduced, and the purpose of overload speed limiting is achieved; when the hydraulic pressure of the oil inlet hole groove (102) after pressure relief is smaller than the compression yield force of the high-pressure hard spring (410), the inverted cone-shaped circular cap head (409) is jointed with the oil unloading block (411) and returns to the overflow hole (111), at the moment, the one-way overflow valve (4) is closed, and the path of the hydraulic oil is changed again: the output shaft (11) recovers to a normal rotating speed running state through the oil inlet hole groove (102), the driving oil cavity (101), the oil outlet hole groove (103), the throttling hole and the transition cavity (110), so that the functions of overload speed reduction and normal rotating speed recovery after pressure relief are realized;

e. keeping the electromagnetic valve (3) closed, closing the oil inlet (107) and the oil outlet (113), entering a forced closing state, enabling the output shaft (11) to still rotate inertially, continuously and directly guiding oil in the oil inlet hole groove (102) into the oil outlet hole groove (103), causing a vacuum air column phenomenon of the oil inlet hole groove (102) if the oil is not processed, gradually increasing the pressure of the oil outlet hole groove (103), gradually reducing the speed of the output shaft (11) through the blocking effect of the throttling column (23), and being influenced by the reducing throttling of the throttling column (23), enabling the hydraulic pressure in the transition cavity (110) to be larger than the pressure in the oil inlet hole groove (102), pushing the inverted cone-shaped round cap head (411) and the oil unloading block (411) through a back pressure difference, enabling the low-pressure soft spring (407) to be highly compressed, enabling the oil unloading block (411) to leak out of the overflow hole (111), enabling the oil in the transition cavity (110) to return to the oil inlet hole groove (102) under the driving of the back pressure difference, completing oil supplementing, forming a feedback route until the pressure in the whole shell (1) is balanced, and the output shaft (11) is not prone to run, and the phenomenon of the output shaft (11) is eliminated, and the air column (409) possibly occurring in a shutdown time.