CN112360712A - Axial plunger type hydraulic pump of hydraulic return stroke - Google Patents
Axial plunger type hydraulic pump of hydraulic return stroke Download PDFInfo
- Publication number
- CN112360712A CN112360712A CN202011192039.XA CN202011192039A CN112360712A CN 112360712 A CN112360712 A CN 112360712A CN 202011192039 A CN202011192039 A CN 202011192039A CN 112360712 A CN112360712 A CN 112360712A
- Authority
- CN
- China
- Prior art keywords
- pump body
- rod
- spring
- piston
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/26—Control
- F04B1/28—Control of machines or pumps with stationary cylinders
- F04B1/29—Control of machines or pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
- F04B1/295—Control of machines or pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the swash plate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/26—Control
- F04B1/30—Control of machines or pumps with rotary cylinder blocks
- F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
- F04B1/324—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the swash plate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/001—Noise damping
- F04B53/003—Noise damping by damping supports
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
- F16F15/0232—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means with at least one gas spring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/046—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means using combinations of springs of different kinds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
- F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M5/00—Engine beds, i.e. means for supporting engines or machines on foundations
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention discloses an axial plunger type hydraulic pump with a hydraulic return stroke, which comprises a pump body, wherein a variable piston is arranged in the pump body, a lead screw is arranged on the variable piston in a threaded manner, a locking seat is arranged on the pump body, a shell is arranged on the pump body through a locking screw, a limiting sliding chute is arranged on the inner side wall of the shell, a threaded sleeve is fixedly connected to the upper end of the lead screw, a sliding rod is fixedly connected to the side wall of the threaded sleeve, a threaded rod is connected to the threaded sleeve in a threaded manner, and a first bevel gear is arranged on the threaded rod; the motor is installed on the inner wall of the shell, a worm is installed on an output shaft of the motor, a horizontal rotating shaft is horizontally installed on the inner side wall of the shell, and a worm wheel and a second bevel gear are installed on the horizontal rotating shaft. The vibration-damping pump has the advantages of ingenious structure, reasonable design, lower manufacturing cost and simple and convenient daily maintenance, and meanwhile, the damping mechanism can effectively reduce the influence of vibration on the pump body.
Description
Technical Field
The invention relates to the technical field of hydraulic pumps, in particular to an axial plunger type hydraulic pump with a hydraulic return stroke.
Background
In a hydraulic system, a hydraulic pump is used as an energy conversion element to convert mechanical energy of an electric motor into pressure energy of oil, so as to provide a certain pressure and flow rate of liquid for the hydraulic system. The hydraulic pump is classified into a fixed displacement pump and a variable displacement pump according to whether the hydraulic fluid is input (or output) in a unit time or not, and the axial plunger type hydraulic pump belongs to one of the variable displacement pumps. In the conventional axial plunger type hydraulic pump, the flow rate is generally adjusted by changing the inclination angle of a swash plate, and the inclination angle of the swash plate is generally adjusted by using a manual servo valve.
Chinese patent 201420756143.0 discloses an axial plunger hydraulic pump, which comprises a pump body, a swash plate, a rotor and a plunger assembly rotating synchronously with the rotor, wherein the plunger assembly is abutted against the swash plate through a slipper; the hydraulic reversing device is used for controlling the inclination angle of the swash plate.
Although the device overcomes the defect of complex adjustment operation by using a manual servo valve, the cleanness of the working oil is ensured by using hydraulic transmission, the requirement on daily maintenance is higher, the requirement on manufacturing precision is higher, the cost is higher, a technician with higher technical level is required to maintain the device when a fault occurs, and the maintenance cost is higher.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, a manual servo valve is unchanged in operation, a hydraulic reversing device is high in maintenance and repair cost, and the manufacturing cost is high.
In order to achieve the purpose, the invention adopts the following technical scheme:
an axial plunger type hydraulic pump of a hydraulic return stroke comprises a pump body, wherein a variable piston is arranged in the pump body, a lead screw is arranged on the variable piston in a threaded mode, a locking seat is arranged on the pump body and is connected into the locking seat in a sliding mode, a shell is arranged on the pump body through a locking screw, a limiting sliding groove is formed in the inner side wall of the shell, a threaded sleeve is fixedly connected to the upper end of the lead screw, a sliding rod is fixedly connected to the side wall of the threaded sleeve and is connected into the limiting sliding groove in a sliding mode, a threaded rod is connected onto the threaded sleeve in a threaded mode, the upper end of the threaded rod is arranged on the shell through a bearing, and a;
a motor is mounted on the inner wall of the shell, a worm is mounted on an output shaft of the motor, a horizontal rotating shaft is horizontally mounted on the inner side wall of the shell, a worm wheel and a second bevel gear are mounted on the horizontal rotating shaft, the second bevel gear is meshed with the first bevel gear, and the worm wheel is meshed with the worm;
the lower end face of the pump body is provided with a base through a buffer mechanism;
when the hydraulic pump works, when the inclination angle of the swash plate in the hydraulic pump is adjusted, the motor is turned on, the output shaft of the motor drives the worm to rotate, the worm wheel rotates along with the worm and drives the horizontal rotating shaft to rotate, the second bevel gear rotates and drives the first bevel gear to rotate, the threaded rod rotates along with the worm, the threaded rod is in threaded connection with the threaded sleeve, and the threaded sleeve cannot rotate along with the threaded rod under the limitation of the sliding rod and the limiting sliding groove, so that the threaded sleeve drives the threaded rod to move in the vertical direction, and the variable piston moves along with the variable piston to adjust the inclination angle of the swash; the rotating speed of the motor is reduced through the worm and the worm wheel, the transmission is stable, the rotating speed of the motor can be effectively reduced due to the large transmission, and the problem that the angle adjusting precision is not easy to control due to the fact that the inclination angle of the swash plate is too fast due to the too fast rotating speed of the motor is solved; the buffer gear can buffer the influence of vibration to the pump body.
Preferably, the buffer mechanism comprises a piston buffer mechanism, the piston buffer mechanism comprises a hollow pipe, the hollow pipe is fixedly mounted on the upper end surface of the base, movable plates are fixedly mounted on two sides of the pump body, a plurality of piston rods are symmetrically mounted on the lower end surface of the movable plates, and the lower end of each piston rod extends into the hollow pipe and is fixedly mounted with a piston;
when the device works, when the hydraulic pump is vibrated (because the hydraulic pump needs to be attached to other objects and is inconvenient to mount if forces in the transverse direction and the vertical direction are not limited in the device), the base is attached to other objects, so that the vibration condition of the base is the same as that of the attachment, the base generates certain reciprocating motion in the vertical direction along with the vibration after being vibrated, the hollow pipe also moves in the vertical direction along with the motion of the base, when the hollow pipe moves, due to the sliding connection between the hollow pipe and the piston, due to the inertia of the force, when the hollow pipe moves, the piston stays at the initial position within a short time due to the inertia, the hollow pipe and the piston slide relatively, and after the vibration stops, the piston rod and the movable plate drive the pump body to return to the initial state relative to the base due to the air pressure (as shown in fig. 1), the impact of vibration on the pump body can be relieved through the piston buffer mechanism, the pump body can stay at an initial position due to inertia when vibration is generated, and the pump body is restored to an initial state relative to the base along with the piston after the impact force of the vibration is relieved or disappears;
preferably, the buffer mechanism further comprises a spring buffer mechanism, the spring buffer mechanism comprises a large mounting disc and a small mounting disc, the large mounting disc and the small mounting disc are both mounted on the side wall of the hollow tube, the small mounting disc is rotatably connected with a first connecting rod and a second connecting rod, the large mounting disc is rotatably connected with an L-shaped connecting rod, the tail end of the L-shaped connecting rod is rotatably connected to the first connecting rod, the L-shaped connecting rod and the first connecting rod are jointly mounted with a first spring, the second connecting rod and the movable plate are jointly mounted with a second spring, and the second railing and the base are jointly mounted with a third spring;
when the hydraulic pump works, when the hydraulic pump is vibrated, the base reciprocates in the vertical direction along with the attachment piece, the base continuously transmits the vibration force upwards, the third spring is compressed by upward extrusion force or extended by downward pulling force, the compression and extension conditions of the third spring are similar, so the compression of the third spring is taken as an example for explanation, after the third spring is compressed, the elastic force of the third spring which recovers the original length pushes the second connecting rod to rotate upwards, the second spring is compressed therewith, the influence of vibration on the pump body is reduced by utilizing the elastic force of the third spring and the second spring, the pump body is still at the initial position in a short time under the action of inertia, meanwhile, the base drives the hollow pipe to move upwards in the vertical direction when moving, so the small mounting plate and the large mounting plate also move upwards in the vertical direction, and the relative distance between the small mounting plate and the movable plate changes, when the vibration disappears, due to the balance of force, the elastic force of the spring which recovers the original length drives the pump body to recover to the initial state, when the pump body recovers to the initial state, due to the fixed position of the base, the elastic force of the third spring and the second spring which recover the original length drives the movable plate and the pump body to move upwards, and the elastic force of the first spring which recovers the original length pushes the L-shaped connecting rod to rotate downwards and simultaneously pushes the movable plate to move upwards until the distance between the pump body and the base recovers to the initial state (as shown in fig. 1);
preferably, a plurality of limiting rods are symmetrically arranged on the base, and the upper end of each limiting rod penetrates through the movable plate and is fixedly provided with a limiting block; when the vibration pump works, the distance between the base and the pump body can be changed to a certain extent, the pump body can be displaced to a certain extent relative to the base, when the position of the pump body is changed, the pump body drives the movable plate to slide on the limiting rod, the motion direction of the pump body is limited, the smooth sliding of the pump body is ensured, meanwhile, the situation that the first spring, the second spring and the third spring cannot be distorted when being compressed due to vibration can be ensured, and the failure of the springs is avoided; the limiting block can ensure that the movable plate cannot be separated from the limiting rod due to excessive movement, and can also avoid the situation that the spring is excessively extended and loses efficacy due to overlarge relative distance between the pump body and the base;
preferably, a plurality of threaded mounting holes are symmetrically formed in the base; when the locking device works, the base can be installed at a set position needing to be used through the threaded installation hole and the locking screw, the assembly and disassembly are simple and rapid, the application range is wide, the locking device can be installed on most objects through the locking screw, and meanwhile, the installation position and the installation direction are not limited;
compared with the prior art, the invention has the beneficial effects that:
1. the invention adjusts the inclination angle of the swash plate through the motor, the worm wheel, the first bevel gear, the second bevel gear, the threaded rod and the threaded sleeve, has simple and ingenious structure, lower manufacturing cost and simple and convenient daily maintenance, can inspect and replace internal parts only by general operators when a fault occurs, has lower maintenance cost, reduces the rotating speed of the motor through the worm and the worm wheel, has stable transmission and larger transmission, can effectively reduce the rotating speed of the motor, and avoids the problem that the angle adjusting precision is difficult to control because the inclination angle of the swash plate is too fast due to the too fast rotating speed of the motor.
2. According to the invention, the vibration is buffered by arranging two different buffer mechanisms, namely the piston buffer mechanism and the spring buffer mechanism, the influence of the vibration on the pump body is reduced by using different buffer principles of the different buffer mechanisms, the buffer effect can be ensured, and the pump body can be ensured not to be damaged by the vibration even if one buffer mechanism fails and the other buffer mechanism is supplemented.
In conclusion, the pump body structure is ingenious in structure, reasonable in design, low in manufacturing cost and simple and convenient in daily maintenance, and meanwhile, the buffer mechanism can effectively reduce the influence of vibration on the pump body.
Drawings
Fig. 1 is a schematic structural view of an axial plunger hydraulic pump of a hydraulic return stroke according to the present invention;
FIG. 2 is an enlarged view of a part of the structure of a buffer mechanism in an axial plunger hydraulic pump of a hydraulic return stroke according to the present invention;
fig. 3 is an enlarged view of the internal structure of the housing of the hydraulic return axial plunger hydraulic pump according to the present invention.
In the figure: the device comprises a pump body 1, a motor 2, a worm 3, a shell 4, a horizontal rotating shaft 5, a worm wheel 6, a second bevel gear 7, a threaded rod 8, a first bevel gear 9, a threaded sleeve 10, a sliding rod 11, a limiting sliding groove 12, a locking seat 13, a lead screw 14, a variable piston 15, a third spring 16, a hollow pipe 17, a base 18, a threaded mounting hole 19, a limiting rod 20, a movable plate 21, a limiting block 22, a piston 23, a piston rod 24, a small mounting disc 25, a first connecting rod 26, a first spring 27, a second spring 28, a second connecting rod 29, a large mounting disc 30 and a connecting rod 31L.
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. 1-3, an axial plunger type hydraulic pump with a hydraulic return stroke comprises a pump body 1, wherein a variable piston 15 is arranged inside the pump body 1, a screw rod 14 is arranged on the variable piston 15 in a threaded manner, a locking seat 13 is arranged on the pump body 1, the screw rod 14 is slidably connected into the locking seat 13, a housing 4 is arranged on the pump body 1 through a locking screw, a limiting chute 12 is arranged on the inner side wall of the housing 4, a threaded sleeve 10 is fixedly connected to the upper end of the screw rod 14, a sliding rod 11 is fixedly connected to the side wall of the threaded sleeve 10, the sliding rod 11 is slidably connected into the limiting chute 21, a threaded rod 8 is connected to the threaded sleeve 10 in a threaded manner, the upper end of the threaded rod 8 is arranged on the housing 4 through a bearing, and a first bevel;
a motor 2 is mounted on the inner wall of the shell 4, a worm 3 is mounted on an output shaft of the motor 2, a horizontal rotating shaft 5 is horizontally mounted on the inner side wall of the shell 4, a worm wheel 6 and a second bevel gear 7 are mounted on the horizontal rotating shaft 5, the second bevel gear 7 is meshed with a first bevel gear 9, and the worm wheel 6 is meshed with the worm 3;
the lower end face of the pump body 1 is provided with a base 18 through a buffer mechanism;
when the hydraulic pump works, when the inclination angle of the swash plate in the hydraulic pump is adjusted, the motor 2 is turned on, the output shaft of the motor 2 drives the worm 3 to rotate, the worm wheel 6 rotates along with the worm 3 and drives the horizontal rotating shaft 5 to rotate, the second bevel gear 7 rotates and drives the first bevel gear 9 to rotate, the threaded rod 8 rotates along with the worm wheel, the threaded rod 8 is in threaded connection with the threaded sleeve 10, the threaded sleeve 10 cannot rotate along with the threaded rod 8 under the limitation of the sliding rod 11 and the limiting sliding groove 12, so that the threaded sleeve 10 drives the screw rod 14 to move in the vertical direction, and the variable piston 15 moves along with the threaded sleeve to adjust the inclination angle of the swash plate; the rotating speed of the motor 2 is reduced through the worm 3 and the worm wheel 6, the transmission is stable, the rotating speed of the motor 2 can be effectively reduced due to the large transmission, and the problem that the angle adjusting precision is not easy to control due to the fact that the inclined angle of the swash plate is too fast caused by the too fast rotating speed of the motor 2 is solved; the damper mechanism can damp the influence of vibration on the pump body 1.
As an embodiment of the present invention, the buffering mechanism includes a piston buffering mechanism, the piston buffering mechanism includes a hollow tube 17, the hollow tube 17 is fixedly installed on the upper end surface of the base 18, movable plates 21 are fixedly installed on both sides of the pump body 1, a plurality of piston rods 24 are symmetrically installed on the lower end surface of the movable plates 21, the lower end of each piston rod 24 extends into the hollow tube 17 and is fixedly installed with a piston 23;
when the hydraulic pump works, when the hydraulic pump is vibrated (because the hydraulic pump needs to be attached to other objects and is inconvenient to mount if forces in the transverse direction and the vertical direction are not limited in the device, only the situation that more vertical vibration occurs is considered in the device), because the base 18 is attached to other objects, the vibration situation of the base 18 is the same as that of an accessory, the base 18 generates certain reciprocating motion in the vertical direction along with the vibration after being vibrated, the hollow pipe 17 also moves in the vertical direction along with the movement of the base 18, when the hollow pipe 17 moves, because the hollow pipe 17 is in sliding connection with the piston 23, because of the inertia of force, the piston 23 stays at the initial position due to the inertia in a short time when the hollow pipe 17 moves, relative sliding is generated between the hollow pipe 17 and the piston 23, and after the vibration stops, the piston 23 is in a short time due to air pressure, The piston rod 24 and the movable plate 21 drive the pump body 1 to return to the initial state (as shown in fig. 1) relative to the base 18, the impact of the vibration on the pump body 1 can be reduced through the piston buffering mechanism, the pump body 1 can stay at the initial position due to inertia when the vibration is generated, and the pump body 1 returns to the initial state relative to the base 18 along with the piston 23 after the impact force of the vibration is reduced or eliminated.
As an embodiment of the present invention, the buffer mechanism further includes a spring buffer mechanism, the spring buffer mechanism includes a large mounting plate 30 and a small mounting plate 25, and the large mounting plate 30 and the small mounting plate 25 are both mounted on the side wall of the hollow tube 27, the small mounting plate 25 is rotatably connected with a first link 26 and a second link 29, the large mounting plate 30 is rotatably connected with an L-shaped link 31, and the end of the L-shaped link 31 is rotatably connected to the first link 26, the L-shaped link 31 and the first link 26 are mounted with a first spring 27, the second link 29 and the movable plate 21 are mounted with a second spring 28, and the second rail 29 and the base 28 are mounted with a third spring 16;
in operation, when the hydraulic pump is vibrated, the base 18 reciprocates in the vertical direction along with the attachment, the base 18 continuously transmits the vibration force upwards, the third spring 16 is compressed by an upward extrusion force or extended by a downward pulling force, the third spring 16 is compressed and extended similarly, so the third spring 16 is compressed, the third spring 16 is compressed and then returns to the original length to push the second connecting rod 29 to rotate upwards, the second spring 28 is compressed, the influence of vibration on the pump body 1 is reduced by the elastic force of the third spring 16 and the second spring 28, the pump body 1 is still at the initial position in a short time due to inertia, and meanwhile, the small mounting plate 25 and the large mounting plate 30 also move upwards in the vertical direction due to the upward movement of the hollow pipe 17 in the vertical direction when the base 18 moves, therefore, the relative distance between the small mounting plate 25 and the movable plate 21 changes, the first link 26 rotates and the first spring 27 compresses, after the vibration disappears, due to the balance of forces, the elastic force of the spring returning to the original length will drive the pump body 1 to return to the original state, when the pump body 1 returns to the original state, due to the fixed position of the base 18, the elastic force of the third spring 16 and the second spring 28 returning to the original length drives the movable plate 21 and the pump body 1 to move upwards, and the elastic force of the first spring 27 returning to the original length pushes the L-shaped link 31 to rotate downwards and simultaneously push the movable plate 21 to move upwards, until the distance between the pump body 1 and the base 18 returns to the original state (as shown in fig. 1).
As an embodiment of the present invention, a plurality of limiting rods 20 are symmetrically installed on the base 18, and the upper end of each limiting rod 20 penetrates through the movable plate 21 and is fixedly installed with a limiting block 22; during working, during vibration, the distance between the base 18 and the pump body 1 changes to a certain extent, the pump body 1 displaces to a certain extent relative to the base 18, when the position of the pump body 1 changes, the pump body 1 drives the movable plate 21 to slide on the limiting rod 20, the motion direction of the pump body 1 is limited, the sliding of the pump body 1 is ensured to be stable, meanwhile, the situation that the first spring 27, the second spring 28 and the third spring 16 are not twisted when compressed due to vibration can be ensured, and the failure of the springs is avoided; the limiting block 22 can ensure that the movable plate 21 does not excessively move away from the limiting rod 20, and can also avoid the situation that the relative distance between the pump body 1 and the base 18 is too large to cause the failure of the excessive extension of the spring.
As an embodiment of the present invention, a plurality of threaded mounting holes 19 are symmetrically formed on the base 18; during operation, base 18 can be installed at the established position that needs to use through screw thread mounting hole 19 and locking screw, and the dismouting is simple swift, and application range is wider simultaneously, can all install through locking screw on most article, also do not restrict mounted position and installation direction simultaneously.
The specific working process is as follows:
when the hydraulic pump works, when the inclination angle of the swash plate in the hydraulic pump is adjusted, the motor 2 is turned on, the output shaft of the motor 2 drives the worm 3 to rotate, the worm wheel 6 rotates along with the worm 3 and drives the horizontal rotating shaft 5 to rotate, the second bevel gear 7 rotates and drives the first bevel gear 9 to rotate, the threaded rod 8 rotates along with the worm wheel, the threaded rod 8 is in threaded connection with the threaded sleeve 10, the threaded sleeve 10 cannot rotate along with the threaded rod 8 under the limitation of the sliding rod 11 and the limiting sliding groove 12, so that the threaded sleeve 10 drives the screw rod 14 to move in the vertical direction, and the variable piston 15 moves along with the threaded sleeve to adjust the inclination angle of the swash plate;
when the hydraulic pump is vibrated, the base 18 generates certain reciprocating motion in the vertical direction along with the vibration after being vibrated, the hollow pipe 17 also moves in the vertical direction along with the movement of the base 18, when the hollow pipe 17 moves, due to the sliding connection between the hollow pipe 17 and the piston 23, due to the inertia of force, the piston 23 stays at the initial position due to the inertia in a short time when the hollow pipe 17 moves, the relative sliding between the hollow pipe 17 and the piston 23 is generated, and after the vibration stops, the piston 23, the piston rod 24 and the movable plate 21 drive the pump body 1 to return to the initial state (as shown in fig. 1) relative to the base 18 due to the air pressure;
when the hydraulic pump is vibrated, the base 18 reciprocates in the vertical direction along with the attachment, the base 18 continuously transmits the vibration force upwards, the third spring 16 is compressed by an upward extrusion force or extended by a downward pulling force, the third spring 16 is compressed and extended similarly, so the third spring 16 is compressed, the third spring 16 is used as an example, after being compressed, the original long elastic force of the third spring 16 pushes the second connecting rod 29 to rotate upwards, the second spring 28 is compressed accordingly, the influence of the vibration on the pump body 1 is reduced by the elastic force of the third spring 16 and the second spring 28, the pump body 1 is still at the initial position for a short time due to inertia, and meanwhile, the small mounting plate 25 and the large mounting plate 30 move upwards in the vertical direction due to the fact that the hollow pipe 17 moves upwards in the vertical direction when the base 18 moves, and the relative distance between the small mounting plate 25 and the movable plate 21 changes, the first link 26 rotates and the first spring 27 compresses, after the vibration disappears, due to the balance of forces, the spring force of the spring returning to the original length will drive the pump body 1 to return to the original state, when the pump body 1 returns to the original state, due to the fixed position of the base 18, the third spring 16 and the second spring 28 return to the original length and drive the movable plate 21 and the pump body 1 to move upwards, and the spring force of the first spring 27 returning to the original length pushes the L-shaped link 31 to rotate downwards and simultaneously push the movable plate 21 to move upwards, until the distance between the pump body 1 and the base 18 returns to the original state (as shown in fig. 1).
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 to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. The axial plunger type hydraulic pump with the hydraulic return stroke comprises a pump body (1), wherein a variable piston (15) is arranged inside the pump body (1), a screw rod (14) is installed on the variable piston (15) in a threaded mode, and the axial plunger type hydraulic pump is characterized in that: the pump comprises a pump body (1), a locking seat (13) and a lead screw (14), wherein the pump body (1) is provided with the locking seat (13), the lead screw (14) is connected in the locking seat (13) in a sliding manner, the pump body (1) is provided with a shell (4) through a locking screw, the inner side wall of the shell (4) is provided with a limiting sliding groove (12), the upper end of the lead screw (14) is fixedly connected with a threaded sleeve (10), the side wall of the threaded sleeve (10) is fixedly connected with a sliding rod (11), the sliding rod (11) is connected in the limiting sliding groove (21) in a sliding manner, the threaded sleeve (10) is in threaded connection with a threaded rod (8), the upper end of the threaded rod (8) is arranged on the shell (;
the inner wall of the shell (4) is provided with a motor (2), an output shaft of the motor (2) is provided with a worm (3), the inner side wall of the shell (4) is horizontally provided with a horizontal rotating shaft (5), the horizontal rotating shaft (5) is provided with a worm gear (6) and a second bevel gear (7), the second bevel gear (7) is meshed with the first bevel gear (9), and the worm gear (6) is meshed with the worm (3);
the lower end face of the pump body (1) is provided with a base (18) through a buffer mechanism.
2. The hydraulically-backed axial plunger hydraulic pump of claim 1, wherein: buffer gear includes piston buffer gear, piston buffer gear includes hollow tube (17), and hollow tube (17) fixed mounting on the up end of base (18), the both sides fixed mounting of the pump body (1) has fly leaf (21), many piston rods (24) are installed to the lower terminal surface symmetry of fly leaf (21), every the lower extreme of piston rod (24) all extends to in hollow tube (17) and fixed mounting has piston (23).
3. The hydraulically-backed axial plunger hydraulic pump of claim 2, wherein: buffer gear still includes spring buffer gear, spring buffer gear includes big mounting disc (30) and little mounting disc (25), and on the lateral wall of hollow tube (17) was all installed to big mounting disc (30) and little mounting disc (25), it is connected with first connecting rod (26) and second connecting rod (29) to rotate on little mounting disc (25), it is connected with L type connecting rod (31) to rotate on big mounting disc (30), and the end of L type connecting rod (31) rotates and connects on first connecting rod (26), install first spring (27) jointly on L type connecting rod (31) and first connecting rod (26), install second spring (28) jointly on second connecting rod (29) and fly leaf (21), install third spring (16) jointly on second railing (29) and base (28).
4. The hydraulically-backed axial plunger hydraulic pump of claim 2, wherein: a plurality of limiting rods (20) are symmetrically arranged on the base (18), and the upper end of each limiting rod (20) penetrates through the movable plate (21) and is fixedly provided with a limiting block (22).
5. The hydraulically-backed axial plunger hydraulic pump of claim 1, wherein: the base (18) is symmetrically provided with a plurality of thread mounting holes (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011192039.XA CN112360712A (en) | 2020-10-30 | 2020-10-30 | Axial plunger type hydraulic pump of hydraulic return stroke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011192039.XA CN112360712A (en) | 2020-10-30 | 2020-10-30 | Axial plunger type hydraulic pump of hydraulic return stroke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112360712A true CN112360712A (en) | 2021-02-12 |
Family
ID=74513948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011192039.XA Pending CN112360712A (en) | 2020-10-30 | 2020-10-30 | Axial plunger type hydraulic pump of hydraulic return stroke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112360712A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115110755A (en) * | 2022-06-23 | 2022-09-27 | 贵阳市政建设有限责任公司 | Modular standardized easy-to-detach building plastic formwork and machining device thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204419479U (en) * | 2014-12-23 | 2015-06-24 | 河北欧耐机械模具有限公司 | A kind of servo variable pump |
| CN209152784U (en) * | 2018-07-07 | 2019-07-26 | 嘉兴群意家具有限公司 | A kind of sofa bracket with pooling feature |
| CN211456894U (en) * | 2020-01-02 | 2020-09-08 | 天津市礴金电机有限公司 | Double-shaft motor base based on multiple shockproof structure |
-
2020
- 2020-10-30 CN CN202011192039.XA patent/CN112360712A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204419479U (en) * | 2014-12-23 | 2015-06-24 | 河北欧耐机械模具有限公司 | A kind of servo variable pump |
| CN209152784U (en) * | 2018-07-07 | 2019-07-26 | 嘉兴群意家具有限公司 | A kind of sofa bracket with pooling feature |
| CN211456894U (en) * | 2020-01-02 | 2020-09-08 | 天津市礴金电机有限公司 | Double-shaft motor base based on multiple shockproof structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115110755A (en) * | 2022-06-23 | 2022-09-27 | 贵阳市政建设有限责任公司 | Modular standardized easy-to-detach building plastic formwork and machining device thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112360712A (en) | Axial plunger type hydraulic pump of hydraulic return stroke | |
| CN112628239A (en) | High-performance hydraulic oil cylinder with bidirectional buffering function and working method thereof | |
| KR20240000544U (en) | Damping shock absorber structure | |
| CN205331099U (en) | Platform hydraulic pressure removal buffering controlling means stereotypes in tubular product vacuum | |
| CN108952217B (en) | A soil bearing structure for green building | |
| CN212406953U (en) | Axial plunger pump variable device easy to adjust | |
| CN101307816B (en) | Screw axis reciprocating device buffering device | |
| CN213419274U (en) | L-shaped lever type power adjusting mechanism of plunger pump | |
| CN215673377U (en) | Electric grease pump shell damping equipment | |
| CN100561160C (en) | Closed circuit hydraulic lifting device of collision test table | |
| CN114135622A (en) | A intelligent hydraulic pressure damping device for new energy automobile marketing | |
| CN211288589U (en) | Hydraulic buffering electric push rod | |
| CN220302454U (en) | Buffering type hydraulic oil cylinder | |
| CN220378591U (en) | Hydraulic cylinder with screw rod support | |
| CN220706108U (en) | Hydraulic cylinder buffer device | |
| CN205774617U (en) | A kind of mechanical type buffer gear and clay gun | |
| CN202545417U (en) | Floating buffer plunger structure | |
| CN201170300Y (en) | Helical shaft reciprocate mechanism buffering device of sliding block two-side springs | |
| CN221742933U (en) | Hydraulic cylinder with buffer mechanism | |
| CN220816124U (en) | Hydraulic cylinder with buffering performance | |
| CN219035195U (en) | Adjustable buffering type hydraulic cylinder | |
| CN220286591U (en) | Pneumatic actuator with damping limiting device | |
| CN220999115U (en) | Double linkage elevator | |
| CN110410211B (en) | Engine system with adjustable stroke | |
| CN217234238U (en) | Damping device for gear pump convenient to equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |