TWI383862B - Hydraulic lever for manual tool - Google Patents

Description

Hydraulic rod device for manual power tool

This case is related to the hydraulic rod device of the manual power tool. In more detail, it refers to a hydraulic rod device which can prevent hydraulic leakage and insufficient output force due to poor adhesion, and can be easily assembled and produced.

Conventional power tools, such as disassembly and assembly tools for disassembling car calipers, etc., because the parts themselves require large power output and are affected by internal space limitations, most of them use manual drive hydraulic cylinders as the power source, as shown in the first figure. A conventional integrated hydraulic rod device is shown in the hydraulic cylinder main body 1 and is provided with a hydraulic oil tank 2 for storing oil, and the hydraulic cylinder main body 1 has a closed end and an open end. a closed end of the hydraulic cylinder body 2 is provided with a power screw hole 4 for an input shaft 3, and the input shaft 3 is disposed in the hydraulic oil tank and is provided with an input piston member 5; An output shaft 6 is disposed at the end, and the open end is sealed with the output shaft 6 by a fixing nut 7. The output shaft 6 is provided with an output piston member 8 at the hydraulic oil groove 2, and extends through the hydraulic rod. One end of the main body 2 is provided for a manual tool member (such as a caliper dismounting member); wherein the output shaft 6 is sleeved with a spring 9 for elastically restoring.

Thereby, when the user rotates the input shaft 3, the input shaft member 5 drives the input piston member 5 to push the hydraulic oil in the hydraulic oil tank 2 by the screwing action of the input shaft 3 to generate the output piston member 8 and the output shaft 6. As a driving force, 俾 to drive the manual tools to move the author.

However, since the hydraulic cylinder main body 2 is an integral type, the hydraulic oil groove 2 is a deep hole in the processing process, and when the deep hole is processed, the inner end portion (closed end) is easily inserted by the cutter. If it is too long, it is easy to produce machining marks on the wall surface of the hydraulic oil sump 2 due to vibration of the machine operation. When the hydraulic oil tank 2 is used for polishing and grinding, the closer to the wall surface of the hydraulic oil groove 2 at the closed end, the more difficult it is to grind, resulting in the input piston. When the hydraulic oil is pushed, it is easy to cause problems such as oil leakage and insufficient output force due to poor uniformity of the wall surface of the hydraulic oil sump 2, and even when the power screw hole 4 is drilled or threaded, it is also easy for the hydraulic oil sump. 2 The edge of the unevenness is formed at the boundary with the power screw hole 4, and it is difficult to trim because it is located inside the deep hole, which is more likely to cause the above problem. When the input shaft 3 is pumped back, external air is more likely to enter the hydraulic oil sump 2, resulting in insufficient back pumping force, and the spring 9 cannot be used to drive the output shaft 6 to be reset.

Furthermore, the hydraulic cylinder main body 2 is of an integrated design, so that the internal parts need to be assembled from the open end, which relatively makes the parts related to the input shaft 3 more difficult to assemble, and if the assembly fit accuracy is not good. It is also necessary to first remove all the parts on the output shaft 6 side in order to disassemble the parts on the input shaft 3 side, which increases the difficulty in production, manufacturing and quality inspection.

In view of the above problems, the present invention provides a hydraulic rod device for a manual power tool, which has the advantages of facilitating processing, preventing oil leakage of the piston member, deflation, and facilitating assembly and disassembly.

The utility model relates to a hydraulic rod device of a manual power tool, which mainly comprises: a hydraulic rod main body having a hydraulic oil groove penetrating therein, and two ends of the hydraulic rod main body are an input end and an output end respectively; An input shaft is disposed at the input end, and the input shaft is provided with an input piston member at one end of the hydraulic oil groove to be in close contact with the inner wall of the hydraulic oil groove, wherein the input shaft has an outer portion a threaded section; an input end cover, which is a cover body screwed to the input end, the center of which is provided with a power screw hole, the power screw hole 俾 is available for the external thread section to be screwed; and An output shaft is disposed at the output end, and the output end and the output shaft are sealed by a fixed nut, and the output shaft is provided with an output piston member at one end of the hydraulic oil groove to be closely adhered thereto. The inner wall of the hydraulic oil tank and one end of the main body of the hydraulic rod can be installed by a manual tool; thereby, the hydraulic oil tank can store hydraulic oil for input shaft to hydraulic oil tank The hydraulic pressure generated inside can drive the output shaft Manually moving parts of the tool.

One of the effects of the present invention is that the main body of the hydraulic pressure rod of the present invention is separated from the input end cover, and the hydraulic oil groove is formed in a through hole shape, and the flat surface can be surely produced in the case of drilling or polishing. Oil leakage and deflation may occur due to the tightness of the wall surface of the hydraulic oil sump.

In this case, the power screw hole is set on the input end cover. When the thread processing is completed, it is very easy to trim and remove the uneven edge, and does not affect the performance of the oil pressure rod.

In the third case of the present invention, the internal parts of the present invention can be installed separately from the input end and the output end, which simplifies assembly difficulty, and can be easily disassembled, repaired or replaced.

In the fourth case of the present invention, at least one oil seal is provided at the end of the input piston member and the output piston member, and at least one side of the input piston member and the output piston member is provided at the side of the input piston member and the output piston member. A sealing ring that is in close contact with the inner wall of the hydraulic oil sump to improve the adhesion between the input piston member, the output piston member and the wall surface of the hydraulic oil sump.

In the fifth aspect of the present invention, the outer edge of the input end of the hydraulic rod body is provided with a joint threaded portion for the input end cover to be screwed tightly, and the outer diameter of the joint thread portion is smaller than the hydraulic rod The outer diameter of the main body, such that the input end cover is screwed thereon, the outer surface of the input end cover forms a continuous surface with the outer surface of the hydraulic rod main body, thereby maintaining the integrity of the appearance of the present invention and avoiding dirty cards Secure or hook other objects during operation.

For the convenience of the description, the central idea expressed in the column of the above summary of the present invention is expressed by a specific embodiment. The various items in the embodiments are drawn to scale as illustrated and not to the actual proportions of the elements.

As shown in the second to fourth figures, the hydraulic lever device of the manual power tool of the present invention mainly comprises: a hydraulic rod main body 10 having a hydraulic oil groove 11 penetrating therein, the hydraulic oil groove 11 is for storing hydraulic oil, and the two ends of the hydraulic rod body 10 are respectively an input end 12 and an output end 13; the outer end of the input end 12 is provided with a joint thread segment 121; an input shaft 20 The input shaft 20 is provided with an input piston member 21 at one end of the hydraulic oil groove 11, and at least one oil seal member 211 is disposed at the end of the input piston member 21 to be tightly closed. At the inner wall of the hydraulic oil sump 11, and at the side of the input piston member 21, at least one sealing ring 212 is engageable with the inner wall of the hydraulic oil sump 11; wherein the input shaft 20 has an externally threaded section 201. The input shaft 20 is disposed at one end of the hydraulic rod main body 10 and is provided with a tool hole 202. The tool hole 202 is for a force applying rod 50. The input end cover 30 is a cover screwed to the input end 12 to engage the threaded section 121, and a power screw hole 31 is formed in the center thereof. The power screw hole 31 俾 can be used for the external thread segment 201 to be screwed; wherein the outer diameter of the joint thread segment 121 is smaller than the outer diameter of the hydraulic rod body 10, so that the input end cover 30 is screwed thereon The outer surface thereof forms a continuous surface with the outer surface of the hydraulic rod main body 10; and an output shaft 40 is disposed at the output end 13, and a fixed nut is coupled between the output end 13 and the output shaft 40. The sealing shaft 40 is provided with an output piston member 42 at one end of the output shaft 40, and at least one oil seal member 421 is disposed at the end of the output piston member 42 to be in close contact with the inner wall of the hydraulic oil tank 11. And at least one sealing ring 422 is formed on the side of the output piston member 42 to be in close contact with the inner wall of the hydraulic oil sump 11; wherein the output shaft 40 extends through one end of the hydraulic rod main body 10 A manual tooling member (not shown) is provided; further, the hydraulic oil groove 11 is provided with an internal thread segment 131 at the output end 13 , and the outer edge of the fixing nut 41 is correspondingly provided with a fixing thread 411, and The fixing nut 41 is provided with a sleeve hole 412 through which the output shaft 40 can be inserted, and the output shaft 40 is sleeved with a bullet. 43, 43 of the two ends of the spring are abutted against the retaining nut 41 and the output 42 of the piston member.

After clarifying the detailed structure of the above case, the following is a detailed explanation of the action principle of the case:

As shown in the fourth and fifth figures, when the user turns the input shaft 20 into the direction of the hydraulic oil groove 11, the external thread segment 201 cooperates with the power screw hole 31, along with the input shaft 20 In the screwing action, the input piston member 21 can gradually push the hydraulic oil in the hydraulic oil sump 11 to raise the hydraulic pressure in the hydraulic oil sump 11, thereby generating an extrapolating force to the output piston member 42 and the output shaft 40, so that the output shaft 40 Extending from the hydraulic rod main body 10, the cymbal is driven to drive the manual tool members, and by the setting of the urging rod 50, the length of the arm of the user to rotate the input shaft 20 can be increased, so as to achieve labor-saving driving and large The purpose of power output.

On the contrary, when the user rotates the input shaft 20 to the hydraulic oil groove 11 in the opposite direction, the input piston member 21 generates a suction force to the hydraulic oil in the hydraulic oil groove 11, and the hydraulic pressure in the hydraulic oil groove 11 is lowered. The output piston member 42 and the output shaft 40 are forced to pull inwardly, and when the output shaft 40 is extended, the spring 43 is compressed by force, and the elastic force of the spring 43 can be used to restore the force. The output shaft 40 is smoothly retracted into the hydraulic rod main body 10.

The hydraulic rod main body 10 of the present invention is separated from the input end cover 30. The hydraulic oil groove 11 is formed in a through hole shape, and can surely produce a flat surface regardless of drilling or polishing. The adhesion of the wall surface of the oil groove 11 causes problems such as oil leakage and air leakage, and the power screw hole 31 is provided on the input end cover 30. When the thread processing is completed, it is easy to trim and remove the uneven edge without affecting the oil. The performance of the pressure bar. Furthermore, the internal components of the present invention can be installed from the input end 12 and the output end 13, respectively, which simplifies assembly difficulty and facilitates disassembly, repair or replacement of parts.

The ends of the input piston member 21 and the output piston member 42 of the present invention are provided with oil seals 211 and 421 respectively for oil pressure actuation, and the side edges of the input piston member 21 and the output piston member 42 are loopable. The seal rings 212, 422 are adhered to the inner wall of the hydraulic oil sump 11 to improve the adhesion between the input piston member 21, the output piston member 42, and the wall surface of the hydraulic oil sump 11.

The outer end of the input end 12 of the hydraulic rod body 10 is provided with a joint threaded portion 121 for the input end cover 30 to be screwed tightly, and the outer diameter of the joint thread segment 121 is smaller than the hydraulic rod body. When the input end cover 30 is screwed thereon, the outer surface of the input end cover 30 forms a continuous surface with the outer surface of the hydraulic rod main body 10, whereby the appearance of the present invention can maintain integrity and avoid Dirty jamming or hooking other objects during operation, and can increase the aesthetics.

Although the present case is illustrated by a preferred embodiment, those skilled in the art can make various forms of changes without departing from the spirit and scope of the present invention. The above embodiments are only used to illustrate the present case and are not intended to limit the scope of the present invention. All kinds of modifications or changes that are not in violation of the spirit of the case are the scope of patent application in this case.

10. . . Hydraulic rod body

11. . . Hydraulic oil tank

12. . . Input

121. . . Joint thread segment

13. . . Output

131. . . Internal thread segment

20. . . Input shaft

201. . . External thread segment

202. . . Tool hole

twenty one. . . Input piston

211. . . Oil seal

212. . . Sealing ring

30. . . Input cover

31. . . Power screw hole

40. . . Output shaft

41. . . Fixed nut

411. . . Fixed thread

412. . . Socket hole

42. . . Output piston

421. . . Oil seal

422. . . Sealing ring

43. . . spring

50. . . Force rod

The first figure is a schematic cross-sectional view of a conventional hydraulic rod.

The second drawing is a schematic view of the stereoscopic appearance of the present invention.

The third figure is a schematic exploded view of the present invention.

The fourth figure is a schematic diagram of the cross-sectional action of the present invention (1).

The fifth figure is a schematic view of the cross-sectional action of the present invention (2).

10. . . Hydraulic rod body

20. . . Input shaft

30. . . Input cover

40. . . Output shaft

50. . . Force rod

Claims (10)

The utility model relates to a hydraulic rod device of a manual power tool, which mainly comprises: a hydraulic rod main body having a hydraulic oil groove penetrating therein, and two ends of the hydraulic rod main body are respectively an input end and an output end; An input shaft is disposed at the input end, and the input shaft is provided with an input piston member at one end of the hydraulic oil groove to be in close contact with the inner wall of the hydraulic oil tank, wherein the input shaft has an external thread segment An input end cover is a cover body screwed to the input end, and a power screw hole is formed in the center thereof, and the power screw hole is provided for the external thread segment to be screwed; and an output shaft The output end is connected to the output shaft by a fixing nut, and the output shaft is provided with an output piston member at one end of the hydraulic oil groove to be in close contact with the hydraulic oil groove. At the inner wall, and one end of the body of the hydraulic rod is provided for a manual tool assembly; thereby, the hydraulic oil tank can store hydraulic oil for input shaft to the hydraulic oil tank The resulting hydraulic pressure can drive the output shaft and manual With actor member. The hydraulic rod device of the manual power tool of claim 1, wherein the outer end of the input end of the hydraulic rod body is provided with a joint thread segment for the input end cover to be screwed tightly. Hehe. The hydraulic rod device of the manual power tool of claim 2, wherein the outer diameter of the engaging thread segment is smaller than the outer diameter of the hydraulic rod body, so that the input end cap is screwed thereto The outer surface of the input end cap forms a continuous surface with the outer surface of the hydraulic rod body. The hydraulic rod device of the manual power tool of claim 1, wherein at least one oil seal is disposed at an end of the input piston member. The hydraulic rod device of the manual power tool according to claim 1, wherein at least one oil seal is disposed at an end of the output piston member. The hydraulic rod device of the manual power tool according to claim 1, wherein the side of the input piston member is provided with at least one sealing ring which can be closely adhered to the inner wall of the hydraulic oil tank. The hydraulic rod device of the manual power tool according to claim 1, wherein the side of the output piston member is provided with at least one sealing ring which can be closely adhered to the inner wall of the hydraulic oil tank. The hydraulic lever device of the manual power tool of claim 1, wherein the input shaft extends through one of the outer ends of the hydraulic rod body to provide a tool hole, and the tool hole is adapted to apply a force Rod installer. The hydraulic rod device of the manual power tool according to the first aspect of the invention, wherein the hydraulic oil groove is provided with an internal thread segment at the output end, and the outer edge of the fixing nut is correspondingly provided with a fixed thread, and The fixing nut is provided with a fitting hole through which the output shaft can be passed. The hydraulic lever device of the manual power tool of claim 1, wherein the output shaft is sleeved with a spring, and the two ends of the spring are respectively abutted against the fixed nut and the output piston member.