CN211009366U

CN211009366U - Hydraulic device for electric hydraulic tool

Info

Publication number: CN211009366U
Application number: CN201921953257.3U
Authority: CN
Inventors: 叶招土
Original assignee: Taizhou Arnott Hydraulic Tools Co ltd
Current assignee: Taizhou Arnott Hydraulic Tools Co ltd
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2020-07-14
Anticipated expiration: 2029-11-13

Abstract

The utility model provides a hydraulic means for electro-hydraulic tool belongs to mechanical technical field. It has solved the heavy scheduling problem of current hydraulic means for electronic hydraulic tool. The hydraulic device for the electric hydraulic tool comprises an oil cylinder, wherein the bottom of the oil cylinder is fixedly connected with a clamp seat, a piston for dividing an inner cavity of the oil cylinder into an upper cavity and a lower cavity is arranged in the oil cylinder, a spring for supporting the piston to enable the piston to always keep moving trend towards the upper cavity side is arranged in the lower cavity, a sealed oil storage tank is fixedly connected to the top of the oil cylinder, the oil cylinder is provided with an oil inlet channel for communicating the inner cavity of the oil storage tank with the upper cavity and an oil return channel for communicating the inner cavity of the oil storage tank with the lower cavity, the oil storage tank is connected with a driving structure, hydraulic oil in the oil storage tank is pressed into the oil inlet channel when the driving structure works, a buffer cavity is further arranged in the oil storage. The utility model has the advantages of compact structure, small volume, light weight and the like.

Description

Hydraulic device for electric hydraulic tool

Technical Field

The utility model belongs to the technical field of machinery, a electric tool, in particular to hydraulic means for electronic hydraulic tool is related to.

Background

The hydraulic tool organically combines a hydraulic system and a common tool into a whole, and the current electric hydraulic tool with a battery has more application occasions and has the characteristics of small volume, light weight, large output force, convenient operation and the like.

For example, chinese patent literature discloses a steel bar cutting machine with stable oil delivery [ application number: 201420709593.4, respectively; authorization notice number: CN204276750U ], which consists of a cutting part, a hydraulic part and a power part which are axially arranged, wherein the cutting part comprises a clamp seat, a fixed knife and a movable knife, the fixed knife is fixedly arranged on the clamp seat, the movable knife is movably arranged on the clamp seat, the movable knife and the fixed knife cut off the steel bar after relative movement, the hydraulic part comprises a pump body, the plunger pump assembly is arranged in a plurality of plunger holes in the radial direction in the pump body, the oil pumping action of the plunger pump assembly is pushed by rollers arranged on an eccentric shaft head at the front end of the pump shaft, the pump shaft is rotatably supported by the pump body, the rotation of the pump shaft is driven by a motor of a power part, a first spring is arranged at the front end of the pump body, an oil inlet cavity is formed in the rear end of the pump body, a second piston is movably arranged in the oil inlet cavity, a second spring is arranged at the rear end of the second piston, and a cavity A of the oil outlet cavity in front of the first piston is communicated with a cavity B of the oil inlet cavity in front of the second piston through a built-in oil way of the pump body.

The stable bar cutter of foretell oil transportation can improve oil transportation stability, but the setting of first piston, second piston, first spring and second spring makes overall structure's axial length longer, and manufacturing cost is high to make whole volume great, still increased whole weight.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a compact structure, small in size, light in weight's hydraulic means for electro-hydraulic tool.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a hydraulic means for electric hydraulic tool, includes the hydro-cylinder that bottom and pincers seat linked firmly, the hydro-cylinder in be equipped with the piston that separates the hydro-cylinder inner chamber for epicoele and cavity of resorption, the cavity of resorption in be equipped with supporting piston and make the piston remain the spring that makes the trend of upper chamber side shift all the time, a serial communication port, the hydro-cylinder top linked firmly sealed batch oil tank, the hydro-cylinder have with the oil feed passageway that batch oil tank inner chamber and epicoele are linked together, with the oil return passageway that batch oil tank inner chamber and cavity of resorption are linked together, the batch oil tank be connected with drive structure and drive structure during operation with the hydraulic oil pressure oil in the batch oil tank and impress the oil feed passageway, the batch oil tank in still be equipped with cushion chamber and be linked together through oilhole and batch oil tank inner chamber.

The hydraulic device for the electric tool is provided with the elastic structure in the oil storage tank, so that the whole axial length cannot be increased, and the hydraulic device for the electric tool is compact in structure, small in size and light in weight; during operation, the drive structure is impressed the hydraulic oil of batch oil tank inner chamber into the epicoele through the oil feed passageway, promote the piston to pincers seat side displacement work, the hydraulic oil of cavity of resorption passes through oil return passage and gets into the batch oil tank inner chamber, because the piston rod of piston occupies the cavity of resorption space, so make the hydraulic oil mass that gets into the epicoele be less than the oil mass that cavity of resorption returned to the batch oil tank inner chamber, elastic construction provides the hydraulic oil of compensation with the cushion chamber and impresses the batch oil tank inner chamber this moment, make the batch oil tank inner chamber can not lack hydraulic oil, guarantee that the oil feed passageway carries hydraulic oil to the cavity of resorption all the time, the piston displacement is smooth and steady, after the work is accomplished, the spring promotes the piston.

In the hydraulic apparatus for an electro-hydraulic tool described above, the cushion chamber is disposed on a side portion of the oil reservoir, and the axis of the cushion chamber is perpendicular to the axis of the oil reservoir when the axis of the cushion chamber is moved to intersect the axis of the oil reservoir. The buffer cavity is convenient to set, the axial length of the oil storage tank cannot be prolonged, and the structure is compact.

In the hydraulic device for the electric hydraulic tool, the number of the buffer cavities is two and the two buffer cavities are symmetrically arranged, and the two buffer cavities are internally provided with the elastic structures. The structure is symmetrical, the oil storage tank is convenient to manufacture and process, and enough elastic structures can be ensured to buffer and compensate hydraulic oil, so that the working stability is good.

In the hydraulic apparatus for an electro-hydraulic tool described above, the elastic structure includes an oil bladder fixed in the cushion chamber and having elasticity. The oil bag initial state is the shrink state that is extruded by hydraulic oil, during operation, the drive structure is pressed the hydraulic oil of batch oil tank inner chamber into the epicoele through oil feed passageway, promote the piston to the work of pincers seat side displacement, the hydraulic oil of cavity of resorption passes through the oil return passageway and gets into the batch oil tank inner chamber, the compensation effect is played in the oil bag inflation this moment, press the hydraulic oil in the buffer chamber into the oil storage tank, ensure that the oil feed passageway fuel feeding is normal, after the work is accomplished, the spring promotes the piston and resets, the oil bag plays the cushioning effect and the oil bag resumes to the shrink state again to the hydraulic oil that gets into the buffer.

In foretell hydraulic means for electric hydraulic tool, the one end of cushion chamber be the opening, the oil pocket be rubber oil pocket, the one end of rubber oil pocket be the blind end, the other end of rubber oil pocket is the open end, the open end of rubber oil pocket link firmly in the opening part of cushion chamber and the opening of rubber oil pocket and external world are linked together. The rubber oil bag is convenient to manufacture and assemble, and can exhaust air to the outside through the opening when the rubber oil bag contracts, so that the rubber oil bag can work smoothly.

In foretell hydraulic means for electric hydraulic tool, the inner wall of cushion chamber inlay and be equipped with the jump ring, the open end of jump ring and rubber oil bag between be equipped with the gasket, gasket and cushion chamber inner wall between be equipped with O type circle, rubber oil bag in be equipped with the nut, the open end of rubber oil bag flange that the radial turn-over inwards blockked the nut has, a bolt pass the gasket and with nut threaded connection, the bolt axial the through hole has. The open end of the rubber oil bag is communicated with the outside through the through hole, the O-shaped ring is embedded in the inner wall of the buffer cavity to ensure the sealing property between the gasket and the inner wall of the buffer cavity, hydraulic oil leakage in the buffer cavity is avoided, the bolt is screwed up to enable the flange to be limited between the gasket and the nut, and the open end of the rubber oil bag is limited and stable.

As another kind of condition, in foretell hydraulic means for electric hydraulic tool, elastic construction include that the batch oil tank links firmly the fixing base that stretches into in the cushion chamber, the cushion chamber in be equipped with buffer piston and buffer spring, buffer spring one end contradict in the fixing base, buffer spring's the other end contradicts in buffer piston, buffer piston top and cushion chamber between reserve and have a liquid chamber, cross the liquid chamber and cross the oilhole and be linked together, the fixing base have the intercommunicating pore that the axial runs through, buffer piston's outer wall inlays and is equipped with the sealing washer. The intercommunicating pore avoids air blockage, the buffer piston works smoothly, the sealing ring ensures the sealing property between the buffer piston and the buffer cavity, hydraulic oil leakage is avoided, and the buffer piston and the buffer spring are small pieces, so that the whole weight is light.

In the hydraulic device for the electric hydraulic tool, the buffer piston is provided with a piston rod for sleeving the buffer spring, and the fixed seat is provided with a fixed column for sleeving the buffer spring. Thus, the buffer spring works stably.

In the hydraulic apparatus for an electro-hydraulic tool, the driving structure includes an eccentric shaft driven by the motor and axially penetrating the oil storage tank, and the eccentric shaft drives the plurality of plungers located in the oil storage tank to operate.

Compared with the prior art, the hydraulic device for the electric hydraulic tool has the advantages of compact structure, small size, light weight, buffer compensation function, good working stability, long service life and high working efficiency.

Drawings

Fig. 1 is a sectional view of the hydraulic device for an electro-hydraulic tool.

Fig. 2 is an enlarged sectional view of the hydraulic device for an electric hydraulic tool.

Fig. 3 is a schematic cross-sectional view of the cushion structure in the hydraulic apparatus for an electro-hydraulic tool according to embodiment 1.

Fig. 4 is a schematic cross-sectional view of the cushion structure in the hydraulic apparatus for an electro-hydraulic tool according to embodiment 2.

In the figure, 1, a clamp base; 2. an oil cylinder; 3. an upper chamber; 4. a lower cavity; 5. a piston; 6. a spring; 7. an oil storage tank; 8. an oil inlet channel; 9. an oil return passage; 10. a buffer chamber; 11. a rubber oil bladder; 12. a clamp spring; 13. a gasket; 14. an O-shaped ring; 15. a nut; 16. blocking edges; 17. a bolt; 18. a through hole; 19. a fixed seat; 20. a cushion piston; 21. a buffer spring; 22. a liquid passing cavity; 23. a communicating hole; 24. a seal ring; 25. a piston rod; 26. fixing a column; 27. an eccentric shaft; 28. and an oil passing hole.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example 1

As shown in fig. 1, 2 and 3, the hydraulic device for the electric hydraulic tool comprises an oil cylinder 2, the bottom of which is fixedly connected with a clamp seat 1, a piston 5 which divides the inner cavity of the oil cylinder 2 into an upper cavity 3 and a lower cavity 4 is arranged in the oil cylinder 2, a spring 6 which supports the piston 5 and enables the piston 5 to always move towards the upper cavity 3 is arranged in the lower cavity 4, a sealed oil storage tank 7 is fixedly connected with the top of the oil cylinder 2, the oil cylinder 2 is provided with an oil inlet channel 8 which communicates the inner cavity of the oil storage tank 7 with the upper cavity 3 and an oil return channel 9 which communicates the inner cavity of the oil storage tank 7 with the lower cavity 4, the oil storage tank 7 is connected with a driving structure, when the driving structure works, hydraulic oil in the oil storage tank 7 is pressed into the oil inlet channel 8, the driving structure comprises an eccentric shaft 27 which is driven by a motor and axially penetrates through the oil storage tank 7, an eccentric shaft 27 drives three plungers in the oil storage tank 7 to, an elastic structure which plays a role of buffering and compensating the hydraulic oil is arranged in the buffering cavity 10.

In order to achieve compact structure and ensure working stability, the buffer chambers 10 are arranged at the side part of the oil storage tank 7 in the embodiment, the axial lines of the buffer chambers 10 are moved and intersected with the axial line of the oil storage tank 7, then the axial lines of the buffer chambers 10 are perpendicular to the axial line of the oil storage tank 7, the number of the buffer chambers 10 is two, the buffer chambers 10 are symmetrically arranged, and elastic structures are arranged in the two buffer chambers 10.

The elastic structure includes an elastic oil bag fixed in the buffer chamber 10, and the oil bag is a rubber oil bag 11 in this embodiment. One end of the buffer cavity 10 is an opening, one end of the rubber oil bag 11 is a closed end, the other end of the rubber oil bag 11 is an open end, the open end of the rubber oil bag 11 is fixedly connected with the opening of the buffer cavity 10, and the opening of the rubber oil bag 11 is communicated with the outside. In this embodiment, a clamp spring 12 is embedded in the inner wall of the buffer cavity 10, a gasket 13 is arranged between the clamp spring 12 and the open end of the rubber oil bag 11, an O-ring 14 is arranged between the gasket 13 and the inner wall of the buffer cavity 10, a nut 15 is arranged in the rubber oil bag 11, a flange 16 which is turned inwards in the radial direction and blocks the nut 15 is arranged at the open end of the rubber oil bag 11, a bolt 17 penetrates through the gasket 13 and is in threaded connection with the nut 15, and a through hole 18 is axially formed in the bolt 17.

The hydraulic device for the electric tool has a compact structure, can reduce the weight by 8 kilograms, is convenient to carry and is easy to operate; the rubber oil bag 11 is in the initial state of being in the contraction state extruded by the hydraulic oil, when in work, the motor drives the eccentric shaft 27 to rotate, the eccentric shaft 27 enables the plunger piston to work to press the hydraulic oil in the oil storage tank 7 into the upper cavity 3 through the oil inlet channel 8, the piston 5 is pushed to move towards the side of the clamp seat 1 to work, the hydraulic oil in the lower cavity 4 enters the inner cavity of the oil storage tank 7 through the oil return channel 9, because the piston rod of the piston 5 occupies the space of the lower cavity 4, therefore, the oil quantity of the hydraulic oil entering the upper cavity 3 is less than the oil quantity of the hydraulic oil returned from the lower cavity 4 to the inner cavity of the oil storage tank 7, at the moment, the rubber oil bag 11 expands to play a compensation role, the hydraulic oil in the buffer cavity 10 is pressed into the oil storage tank 7, the oil feeding channel 8 is ensured to supply oil normally, after work is finished, the spring 6 pushes the piston 5 to reset, the rubber oil bag 11 plays a role in buffering hydraulic oil entering the buffer cavity 10, and the rubber oil bag 11 is restored to a contraction state again.

Example 2

As shown in fig. 4, the structure and principle of the present embodiment are substantially the same as those of embodiment 1, and the different place is that in the present embodiment, the elastic structure includes a fixing seat 19 fixedly connected to the oil storage tank 7 and extending into the buffer cavity 10, a buffer piston 20 and a buffer spring 21 are disposed in the buffer cavity 10, one end of the buffer spring 21 abuts against the fixing seat 19, the other end of the buffer spring 21 abuts against the buffer piston 20, a liquid passing cavity 22 is reserved between the top end of the buffer piston 20 and the buffer cavity 10, the liquid passing cavity 22 is communicated with the oil passing hole 28, the fixing seat 19 has a communication hole 23 axially penetrating through, two sealing rings 24 are embedded in the outer wall of the buffer piston 20, the buffer piston 20 has a piston rod 25 for the buffer spring 21 to be sleeved, and the fixing seat 19 has a fixing post 26 for the buffer spring.

In an initial state, the buffer piston 20 is pushed by hydraulic oil to overcome the elasticity of the buffer spring 21, so that the buffer spring 21 is in a contraction state, when the hydraulic oil hydraulic; after the work is finished, the spring 6 pushes the piston 5 to reset, and the buffer spring 21 is in a compressed state again.

Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a hydraulic means for electronic hydraulic tool, includes bottom hydro-cylinder (2) that link firmly with pincers seat (1), hydro-cylinder (2) in be equipped with piston (5) for epicoele (3) and cavity of resorption (4) with hydro-cylinder (2) inner chamber separation, cavity of resorption (4) in be equipped with supporting piston (5) and make piston (5) remain throughout to epicoele (3) side spring (6) of moving trend, its characterized in that, hydro-cylinder (2) top link firmly sealed batch oil tank (7), hydro-cylinder (2) have oil feed passageway (8) that are linked together batch oil tank (7) inner chamber and epicoele (3), oil return passageway (9) that are linked together batch oil tank (7) inner chamber and cavity of resorption (4), batch oil tank (7) be connected with drive structure and drive structure during operation with oil feed passageway (8) of impressing in batch oil tank (7), the hydraulic oil storage tank is characterized in that a buffer cavity (10) is further arranged in the oil storage tank (7), the buffer cavity (10) is communicated with an inner cavity of the oil storage tank (7) through an oil passing hole (28), and an elastic structure playing a role in buffering and compensating hydraulic oil is arranged in the buffer cavity (10).

2. The hydraulic apparatus for an electro-hydraulic tool according to claim 1, wherein the cushion chamber (10) is disposed at a side of the reservoir (7), and an axis of the cushion chamber (10) is perpendicular to an axis of the reservoir (7) by moving the axis of the cushion chamber (10) to intersect the axis of the reservoir (7).

3. The hydraulic device for an electro-hydraulic tool according to claim 2, characterized in that the number of the buffer chambers (10) is two and arranged symmetrically, and an elastic structure is arranged in each of the two buffer chambers (10).

4. The hydraulic apparatus for an electro-hydraulic tool according to claim 1, 2 or 3, wherein the elastic structure includes an oil bladder fixed in the buffer chamber (10) and having elasticity.

5. The hydraulic apparatus for an electro-hydraulic tool according to claim 4, wherein one end of the cushion chamber (10) is an opening, the oil bag is a rubber oil bag (11), one end of the rubber oil bag (11) is a closed end, the other end of the rubber oil bag (11) is an open end, the open end of the rubber oil bag (11) is fixedly connected to the opening of the cushion chamber (10) and the opening of the rubber oil bag (11) is communicated with the outside.

6. The hydraulic device for the electro-hydraulic tool according to claim 5, wherein a snap spring (12) is embedded in the inner wall of the buffer cavity (10), a gasket (13) is arranged between the snap spring (12) and the open end of the rubber oil bag (11), an O-shaped ring (14) is arranged between the gasket (13) and the inner wall of the buffer cavity (10), a nut (15) is arranged in the rubber oil bag (11), a flange (16) which is turned inwards in the radial direction to block the nut (15) is arranged at the open end of the rubber oil bag (11), a bolt (17) penetrates through the gasket (13) and is in threaded connection with the nut (15), and a through hole (18) is axially formed in the bolt (17).

7. The hydraulic device of claim 1, 2 or 3 for the electro-hydraulic tool, characterized in that the elastic structure includes a fixing seat (19) extending into the buffer chamber (10) and fixedly connected with the oil storage tank (7), the buffer chamber (10) is provided with a buffer piston (20) and a buffer spring (21), one end of the buffer spring (21) is abutted against the fixing seat (19), the other end of the buffer spring (21) is abutted against the buffer piston (20), a liquid passing chamber (22) is reserved between the top end of the buffer piston (20) and the buffer chamber (10), the liquid passing chamber (22) is communicated with the oil passing hole (28), the fixing seat (19) is provided with a communication hole (23) axially penetrating through, and a sealing ring (24) is embedded in the outer wall of the buffer piston (20).

8. The hydraulic apparatus of claim 7, wherein the damping piston (20) has a piston rod (25) for engaging with the damping spring (21), and the fixing seat (19) has a fixing post (26) for engaging with the damping spring (21).

9. The hydraulic device for an electro-hydraulic tool according to claim 1, 2 or 3, characterized in that the driving structure comprises an eccentric shaft (27) driven by a motor and axially penetrating the oil reservoir (7), wherein the eccentric shaft (27) drives a plurality of plungers located in the oil reservoir (7) to operate.