CN222025951U

CN222025951U - Manual hydraulic tool and machine body thereof

Info

Publication number: CN222025951U
Application number: CN202420454928.6U
Authority: CN
Inventors: 何挺伟; 文礼; 张银根
Original assignee: Taizhou Juli Tools Co ltd
Current assignee: Taizhou Juli Tools Co ltd
Filing date: 2024-03-08
Publication date: 2024-11-19
Anticipated expiration: 2034-03-08

Abstract

The utility model belongs to the technical field of manual tools, and particularly relates to a manual hydraulic tool and a machine body thereof. The machine body comprises a pump body, a wear-resistant sleeve, a clamp head, a piston assembly and a clamp head, wherein the pump body is fixedly arranged on the wear-resistant sleeve; wherein, be formed with the piston chamber between the pump body, wear-resisting cover and the binding clip, the piston subassembly has: the piston rod comprises a piston extending part extending into the piston cavity, a piston arranged on the piston extending part and movably arranged in the wear-resistant sleeve, and a piston spring arranged between the periphery of the piston extending part and the inner wall of the wear-resistant sleeve. Because the wear-resistant sleeve and the pump body are arranged in a split way, the wear-resistant sleeve is only required to be replaced even if the wear-resistant sleeve is worn and failed, and the use of the pump body is not affected.

Description

Manual hydraulic tool and machine body thereof

Technical Field

The utility model belongs to the technical field of manual tools, and particularly relates to a manual hydraulic tool and a machine body thereof.

Background

The manual hydraulic tool is a tool which is driven by a user manually and drives a working part to work through an internal oil transmission mechanism, and has wide application in construction operations such as pipelines, electric power, buildings, decoration and the like. Manual hydraulic tools are generally composed of a body part and working parts, which have various classifications depending on actual working requirements, such as press joints, shear joints, pipe expanding joints, etc.

The existing manual hydraulic tool body part is generally mainly composed of a plunger pump and a clamp head, such as a plunger pump proposed by the applicant's previously disclosed patent CN02612062U, and a cable shearing tool (also a manual hydraulic tool) with a plunger pump is also proposed, an oil cavity is arranged in a pump body of the tool, an oil bag is connected with the tool, a shearing head (i.e. a working part) is arranged on the clamp head, the clamp head is directly arranged on the pump body through screw thread rotation, a piston rod is arranged between the pump body and the clamp head, and the piston rod is pushed by controlling the flow of oil in the pump body through the plunger pump so as to realize the working of the working part on the clamp head. Because the piston rod is directly installed on the pump body, parts such as a piston spring sleeved on the piston rod in the moving process are easy to generate friction with the inner wall of the pump body, the inner wall of the pump body is easy to wear after the service time is long, the whole pump body is easy to fail, the whole pump body needs to be replaced, and the cost is high and troublesome.

Disclosure of Invention

In order to solve the problems, the utility model provides a manual hydraulic tool with high wear resistance and a machine body thereof.

The utility model adopts the following technical scheme:

the utility model proposes a manual hydraulic tool body having the following features: the wear-resistant sleeve is fixedly arranged on the pump body, the clamp head is rotatably arranged at one end, far away from the pump body, of the wear-resistant sleeve, and the piston assembly is arranged on the clamp head; wherein, be formed with the piston chamber between the pump body, wear-resisting cover and the binding clip, the piston subassembly has: the piston rod comprises a piston extending part extending into the piston cavity, a piston arranged on the piston extending part and movably arranged in the wear-resistant sleeve, and a piston spring arranged between the periphery of the piston extending part and the inner wall of the wear-resistant sleeve.

In the manual hydraulic tool body according to the utility model, the wear sleeve may have a material hardness that is greater than the material hardness of the pump body.

In the manual hydraulic tool body provided by the utility model, the wear-resistant sleeve can be made of steel, and the pump body can be made of aluminum.

In the manual hydraulic tool body provided by the utility model, the manual hydraulic tool body can further have the characteristics that: the movable handle is rotationally arranged on the pump body, the fixed handle is fixedly arranged on the pump body, the oil storage component is arranged in the fixed handle and is fixed with the pump body, and the movable handle is provided with an oil storage cavity for storing hydraulic oil and a plunger assembly which is arranged on the pump body; wherein, set up the plunger chamber that one end was sealed one end open-ended on the pump body, the plunger subassembly has: the plunger rod comprises a plunger extending part extending into the plunger cavity and a plunger exposing part exposing out of the plunger cavity, a plunger sleeve is arranged between the periphery of the extending part and the inner wall of the plunger cavity, and the plunger exposing part is arranged on the movable handle.

In the manual hydraulic tool body according to the utility model, the plunger rod, the plunger sleeve and the movable handle may be made of steel.

The manual hydraulic tool body provided by the utility model can also have the characteristics that the pump body is internally provided with: the oil inlet channel is communicated with the oil storage cavity and the plunger cavity, is provided with an oil inlet one-way valve, an oil outlet channel is communicated with the plunger cavity and the piston cavity, is provided with an oil outlet one-way valve, and an oil return channel is communicated with the piston cavity and the oil storage cavity, and is provided with: the main oil return channel, open to the piston chamber, first oil return channel, one end is opened to main oil return channel, the other end is opened to the oil storage chamber, and be close to the one end in oil storage chamber is provided with automatic oil return valve, and the second oil return channel contains: the transverse oil duct is communicated with the oil storage cavity and the longitudinal oil duct is communicated with the main oil return channel, and oil return steel balls and oil return switches used for limiting the oil return steel balls at the staggered positions are arranged at the staggered positions of the transverse oil duct and the longitudinal oil duct.

The hand-operated hydraulic tool machine body provided by the utility model can be characterized in that the wear-resistant sleeve and the pump body are connected through threads and fixed through an adhesive, the wear-resistant sleeve and the clamp head are connected through threads in a rotating manner, a limiting piece for limiting the rotating angle between the wear-resistant sleeve and the clamp head is arranged on the clamp head, a limiting hole is formed in the clamp head, an arc-shaped limiting groove is formed in the wear-resistant sleeve, corresponding to the limiting hole in the circumferential direction, and the inner end of the limiting piece penetrates through the limiting hole and stretches into the limiting groove.

In the manual hydraulic tool body according to the utility model, the piston assembly may further have the feature that: the piston check ring is arranged at one end, away from the piston, in the piston cavity, the spring check ring is fixed at one end, close to the piston, of the piston rod, one end of the piston spring is propped against the spring check ring, the other end of the piston spring extends into and props against the piston check ring, and the piston is fixed at the periphery of the spring check ring.

The hand-operated hydraulic tool body provided by the utility model can also have the characteristic that the periphery of the clamp head is provided with a sheath, and the sheath is provided with an avoiding hole for avoiding the limiting piece.

The utility model also provides a manual hydraulic tool, which is characterized by comprising a machine body and a working part, wherein the working part is arranged on the machine body, and the machine body is the manual hydraulic tool machine body.

In the manual hydraulic tool set forth in the present utility model, there may be further provided a feature in which the head has an arcuate surface, the working member being detachably mounted to the head by a dismounting assembly comprising: the clamp head pin is detachably inserted on the clamp head; the handle is fixed at one end of the clamp head pin; the positioning pin is movably arranged in the positioning hole on the clamp head; the positioning spring is arranged in the positioning hole, and one end of the positioning spring acts on the positioning pin; the clamp head pin is provided with a positioning groove for the outer end of the positioning pin to be inserted, and one side of the handle, facing the clamp head, is provided with an arc positioning surface which is attached to the arc surface.

The actions and effects of the utility model

According to the manual hydraulic tool and the machine body thereof, firstly, as the pump body and the clamp head are connected through the wear-resistant sleeve, and the piston is arranged in the wear-resistant sleeve, the piston rod, the piston spring, the piston and other piston components can move along the inner wall of the wear-resistant sleeve, the wear resistance of a contact part is enhanced, and the wear-resistant sleeve and the pump body are arranged in a split manner, so that the wear-resistant sleeve is only required to be replaced even if the wear-resistant sleeve is worn out and loses efficacy, and the use of the pump body is not affected. Meanwhile, the wear-resistant sleeve and the pump body are arranged in a split mode, the wear-resistant sleeve and the pump body are made of two different materials, if the pump body is made of aluminum materials with light weight, low hardness and low wear resistance, the wear-resistant sleeve is made of steel materials with high hardness and high wear resistance, on one hand, the wear resistance is guaranteed, on the other hand, the quality of the whole tool can be reduced, and the light weight of the tool is realized.

Drawings

Fig. 1 is a structural view of a manual hydraulic tool of the present utility model.

Fig. 2 is a cross-sectional view of the manual hydraulic tool body of the present utility model at a plunger pump.

Fig. 3 is a partial enlarged view at a of fig. 2.

Fig. 4 is a cross-sectional view of the structure of the utility model for connecting the binding clip with the wear sleeve.

Fig. 5 is a structural cross-sectional view of the pump body of the present utility model.

Fig. 6 is a cross-sectional view of the pump body of the present utility model at the oil return passage.

Fig. 7 is a partial enlarged view at B of fig. 6.

Figure 8 is a cross-sectional view of the attachment of the detachment assembly of the present utility model to a jaw.

Fig. 9 is a partial block diagram of a disassembly assembly of the present utility model.

Reference numerals: the manual hydraulic tool 100, the working part 10, the machine body 20, the disassembly assembly 30, the clamp head pin 31, the radial groove 311a, the axial groove 311b, the handle 32, the arc-shaped positioning surface 321, the positioning pin 34, the positioning spring 35, the pump body 40, the mounting groove 41, the plunger cavity 42, the mounting end 43, the oil inlet passage 44, the oil inlet check valve 441, the oil outlet passage 45, the oil outlet check valve 451, the main oil return passage 46, the first oil return passage 47, the automatic oil return valve 471, the lateral oil passage 481, the longitudinal oil passage 482, the oil return steel ball 491, the oil return switch 492, the wear sleeve 50, the limiting piece 51, the limiting groove 52, the clamp head 60, the mounting groove 61, the space 62, the plastic sheath 63, the avoidance hole 64, the roller 65, the piston assembly 70, the piston rod 71, the piston 72, the piston spring 73, the piston retainer ring 74, the spring 75, the screw 76, the plunger assembly 80, the plunger rod 81, the plunger sleeve 82, the movable handle 91, the fixed handle 92, the oil storage part 93, and the oil storage cavity 931.

Detailed Description

In order to make the technical means, creation features, achievement of objects and effects of the present utility model easy to understand, the manual hydraulic tool and the machine body thereof of the present utility model are specifically described below with reference to the embodiments and the accompanying drawings.

< Example >

The present embodiment proposes a manual hydraulic tool 100, as shown in fig. 1, the manual hydraulic tool 100 including a working member 10, a body 20, and a dismounting assembly 30 for detachably mounting the working member 10 on the body 20.

Fig. 3 is a partial enlarged view at a of fig. 2.

As shown in fig. 2 and 3, the body 20 includes a pump body 40, a wear-resistant sleeve 50, a clamp head 60, a piston assembly 70, a plunger assembly 80, a movable handle 91, a fixed handle 92, and an oil storage member 93, wherein the fixed handle 92 is fixed on one side of the pump body 40, and the movable handle 91 is rotatably connected to one side of the pump body 40, so that the movable handle 91 can rotate within a certain range relative to the pump body 40. One end of the wear-resistant sleeve 50 is fixedly arranged on one side of the pump body 40, and the other end of the wear-resistant sleeve 50 is rotationally connected with the clamp head 60 through threads, wherein in the embodiment, the wear-resistant sleeve 50 is sleeved, and one end of the wear-resistant sleeve and the pump body 40 are integrally fixed in a threaded bonding adhesive mode. Specifically, an installation groove 41 is formed on one side of the pump body 40, a piston groove 61 is formed on one side of the clamp head 60 facing the pump body 40, the piston groove 41 is opposite to the installation groove 61, one end of the wear-resistant sleeve 50 extends into and is fixed in the installation groove 41, and the other end of the wear-resistant sleeve is in threaded rotation connection with the inner wall of the piston groove 61, so that a piston cavity for installing the piston assembly 70 is formed between the pump body 40 and the clamp head 60. In this embodiment, there is no direct connection between the pump body 40 and the clamp head 60, which are connected together by the wear sleeve 50, and a certain gap 62 is provided between the end of the pump body 40 and the end of the clamp head 60.

In order to avoid that the jaw 60 falls off due to an excessive rotation angle of the jaw 60 relative to the wear sleeve 50, as shown in fig. 4, a limiting member 51 for limiting the rotation angle is provided on the jaw 60 and the wear sleeve 50. Specifically, an inner thread section is disposed on an inner wall of the piston groove 61 of the clamp head 60, an outer thread section matched with the inner thread section is disposed on an outer periphery of the wear-resistant sleeve 50, a limiting hole is formed at a certain distance on an outer end of the clamp head 60 located on the inner thread section, a limiting piece 51 is inserted into the limiting hole, an arc-shaped limiting groove 52 is formed on one side of the wear-resistant sleeve 50, which corresponds to the limiting hole, at a certain distance along a circumferential direction of the wear-resistant sleeve 50 (the length of the arc-shaped limiting groove 52 in the circumferential direction only occupies a part of the circumferential direction of the wear-resistant sleeve 50), an inner end of the limiting piece penetrates through the limiting hole on the clamp head 60 and stretches into the arc-shaped limiting groove 52, and in a rotation process, two ends of the arc-shaped limiting groove 52 can block the limiting piece 51 so as to prevent the clamp head 60 from continuing to rotate. In this embodiment, the limiting member 51 is a screw, the outer periphery of the clamp head 60 is further provided with a plastic sheath 63, and a avoiding hole 64 is formed in the position of the plastic sheath 63 corresponding to the screw.

As shown in fig. 3, a piston assembly 70 is mounted on the clamp head 60, the piston assembly 70 has a piston rod 71, a piston 72, a piston spring 73, a piston retainer 74 and a spring retainer 75, one end of the piston rod 71 extends into the piston cavity to form a piston extending portion, and the other end extends out of the piston cavity to be provided with a roller 65 for pushing the working member 10 to work. One end of the piston extending portion is fixed with a spring retainer ring 75 through a screw 76, the piston 72 is fixed on the periphery of the spring retainer ring 75, so that the piston 72 can be fixedly installed on the piston extending portion, and the piston 72 can move in a piston cavity along the inner wall of the wear-resistant sleeve 50 under the pushing of oil, so that the piston rod 71 is driven to move. The piston retainer 74 is sleeved at one end of the piston cavity far away from the piston 72, the piston spring 73 is sleeved between the periphery of the piston extending part and the inner wall of the wear-resistant sleeve 50, one end of the piston spring is propped against the spring retainer 75, the other end of the piston spring extends into and is propped against the piston retainer 74, and the piston retainer 74 can limit the stroke of the piston 72 in the piston cavity so as to prevent the piston assembly from being separated from the piston cavity. As shown in fig. 3, the piston retainer 74 is located in the piston groove 61, the middle portion of the piston retainer is provided with a through hole for the piston rod 71 to pass through, the cross section of the piston retainer is in a shape of a convex, a gap for the wear-resistant sleeve 50 to be inserted is formed between the outer side of the convex portion and the inner wall of the piston groove 61, and the structure in the shape can enable the installation among the wear-resistant sleeve 50, the clamp head 60 and the piston assembly 70 to be more compact and stable.

As shown in fig. 5, the pump body 10 is provided with a plunger chamber 42 having one end closed and one end open at a position opposite to the middle, and is provided with a mounting end 43 for fixedly mounting a fixing handle 92 and an oil storage member 93 at an opposite side to the mounting groove 41, the fixing handle 92 is provided with a hollow inside for accommodating the oil storage member 93, and the oil storage member 93 is provided with an oil storage chamber 931 for storing hydraulic oil inside. The pump body 10 is also provided with an oil inlet channel 44 for communicating the oil storage cavity 931 with the plunger cavity 42, an oil outlet channel 45 for communicating the plunger cavity 42 with the piston cavity (or the mounting groove 41), and an oil return channel for communicating the piston cavity (or the mounting groove 41) with the oil storage cavity 931. As shown in fig. 2, the oil inlet passage 44 and the oil outlet passage 45 are provided with an oil inlet check valve 441 and an oil outlet check valve 451, respectively. The plunger cavity 42 is used for installing the plunger assembly 80, the plunger assembly 80 comprises a plunger rod 81 and a plunger sleeve 82, one end of the plunger rod 81 extends into the plunger cavity 42 to form a plunger extending part, the other end extends from the opening end of the plunger cavity 42 and is exposed out of the plunger cavity 42 to form an exposed part, the exposed part is arranged on a movable handle 91 through a rotating shaft, the plunger sleeve 82 is sleeved between the periphery of the plunger extending part and the inner wall of the plunger cavity 42, the plunger sleeve 82 enables the plunger cavity 42 to form a relatively airtight containing cavity, the inner end of the plunger rod 81 is driven to move in the plunger cavity 42 by pulling the movable handle 91, and the plunger rod 81 changes the volume of the airtight containing cavity in the moving process, so that oil is driven to be transported.

Because the plunger rod 81 is easy to generate friction with the plunger sleeve 82 in the moving process, the piston assembly 70 is also easy to generate friction with the wear-resistant sleeve 50 in the moving process, so that the hardness of the wear-resistant sleeve 50, the plunger rod 81 and the plunger sleeve 82 is set to be larger than that of the pump body 40 in order to enhance the wear resistance, for example, steel materials can be selected for the materials of the wear-resistant sleeve 50, the plunger rod 81 and the plunger sleeve 82, the pump body 40 is preferably made of aluminum materials, the wear resistance can be ensured on one hand, the service life of a tool can be prolonged, the quality of the pump body can be greatly reduced on the other hand, and the weight of the tool can be reduced. Meanwhile, the movable handle 91 can also be made of steel materials, so that the hardness is ensured.

Fig. 7 is a partial enlarged view at B of fig. 6.

As shown in fig. 6 and 7, the oil return passage has a main oil return passage 46, a first oil return passage 47, and a second oil return passage, the main oil return passage 46 opens into the piston chamber, one end of the first oil return passage 47 opens into the main oil return passage 46, the other end opens into the oil reservoir 931, and an automatic oil return valve 471 is provided at one end near the oil reservoir 931. When the oil pressure in the piston cavity reaches the preset value, the oil in the piston cavity can flow to the first oil return channel 47 through the main oil return channel 46, and the automatic oil return valve 471 is gradually opened to enable the oil to flow back to the oil storage component 93 to complete automatic pressure relief and oil return.

As shown in fig. 7, the second oil return passage is T-shaped or L-shaped, and has a transverse oil passage 481 leading to the oil storage cavity 931 and a longitudinal oil passage 482 leading to the main oil return passage 46, and the transverse oil passage 481 and the longitudinal oil passage 482 intersect, and a manual oil return assembly is provided at the intersection, and the manual oil return assembly has an oil return steel ball 491 and an oil return switch 492 for limiting the oil return steel ball 491 at the intersection. When manual pressure relief oil return is needed, a user can separate the oil return switch 492 from the oil return steel ball 491 by outwards pulling the oil return switch 492, and the oil return steel ball 491 can move under the pushing of the oil in the longitudinal oil passage 482, so that the transverse oil passage 481 is communicated with the longitudinal oil passage 482, and the oil flows back to the oil storage part 93 through the transverse oil passage 481 to finish pressure relief oil return. By adopting the manual oil return assembly, on one hand, the structure is simple, on the other hand, the manual operation is convenient, and the pressure relief oil return can be rapidly completed.

As shown in fig. 1, the head 60 has an arcuate surface and the working member 10 is removably mounted to the head 60 by the removal assembly 30. As shown in fig. 8, the removal assembly 30 includes a binding clip pin 31, a handle 32, a locating pin 34, and a locating spring 35. The clamp head 60 is provided with a pair of through holes, one end of the clamp head pin 31 passes through the pair of through holes, the other end of the clamp head pin 31 is fixedly provided with the handle 32 through the fixing pin 33, a positioning hole (which is a blind hole) is formed in the clamp head 60 corresponding to the through hole on one side, the positioning pin 34 and the positioning spring 35 are arranged in the blind hole, one end of the positioning spring 35 is propped against the bottom of the blind hole, the other end of the positioning spring 35 acts on the positioning pin 34, the positioning pin 34 can move in the blind hole under the action of the positioning spring 35, the clamp head pin 31 is provided with a positioning groove which is matched with the positioning pin 34 (namely, the outer end of the positioning pin 34 is inserted), and the positioning groove comprises a radial groove 311a and an axial groove 311b which are mutually communicated. As shown in fig. 9, the side of the handle 32 facing the binding clip 60 is provided with an arcuate locating surface 321 which abuts the arcuate surface of the binding clip 60.

When the working part is installed, the binding clip pin 31 is firstly taken out, then the working part is clamped into the straight-shaped opening in the middle of the binding clip 60, the installation hole on the working part is aligned with the through hole, at the moment, the positioning pin 34 is ejected out due to the action of the positioning spring 35, the upper end of the positioning pin 34 protrudes out of the positioning hole, the notch of the axial groove 311b is rotated to be inserted in the direction of the positioning pin 34, when one end of the binding clip pin 31 is clamped into the through hole positioned on the outer side, the upper end of the positioning pin 34 is just positioned in the radial groove 311a, in order to prevent the binding clip pin 31 from sliding out in the working process, the handle 32 can be rotated, the notch of the axial groove 311b faces the direction except the positioning pin 34, at the moment, the upper end of the positioning pin 34 can be guaranteed to be stably abutted in the axial groove 311b, and the axial movement of the binding clip pin 31 cannot be performed (in order to facilitate the confirmation of the orientation of the axial groove 311b by an operator, the notch direction of the axial groove 311b is opposite to the orientation of the handle 32 at the moment, as shown in fig. 9, when the handle 32 faces downwards, namely the notch of the axial groove 311b faces upwards, namely faces upwards, and faces downwards, and faces upwards, 34, namely faces upwards, and faces downwards, and faces the notch 311, and faces upwards, and faces downwards, and is opposite, and is shown as shown in the notch, 311, and is shown in the notch, 311). In addition, when the handle 32 is fixed, the arc locating surface 321 on the inner side of the handle 32 is gradually attached to the arc surface of the clamp head 60 in the process of rotating the handle 32 by a user, and when the arc locating surface is completely attached, feedback can be given to the user to prompt the user that the working part is installed in place.

When the working part is dismounted, the handle 32 is rotated firstly, so that the notch of the axial groove 311b faces the direction of the positioning pin 34, and the handle 32 can be pulled to take out the clamp head pin 31, and then the working part is taken down, so that the dismounting is very convenient. Therefore, in order to aim at some application scenes which need to be carried out in various ways, a user only needs to carry a hydraulic tool main body and then to match with working components with different functions to replace according to actual needs, and each working component does not need to be matched with a hydraulic tool, so that the hydraulic tool is labor-saving and convenient.

Example operation and Effect

According to the manual hydraulic tool and the machine body thereof of the above-mentioned embodiment, firstly, since the pump body 40 and the clamp head 60 are connected through the wear-resistant sleeve 50, and the piston 72 is disposed in the wear-resistant sleeve 50, the piston assembly 70 such as the piston rod 71, the piston 72 and the piston spring 73 can move along the inner wall of the wear-resistant sleeve 50, the wear resistance of the contact position is enhanced, and the wear-resistant sleeve 50 and the pump body 40 are separately disposed, even if the wear-resistant sleeve 50 is worn out and failed, only the wear-resistant sleeve 50 needs to be replaced, and the use of the pump body 40 is not affected.

Further, in the above embodiment, the wear-resistant sleeve 50 and the pump body 40 are separately arranged, so that the wear-resistant sleeve 50 and the pump body 40 can be made of two different materials, for example, the pump body 40 is made of aluminum materials with light weight, relatively low hardness and relatively low wear resistance, and the wear-resistant sleeve 50 is made of steel materials with high hardness and high wear resistance, so that on one hand, the wear resistance is ensured, and on the other hand, the quality of the whole tool can be reduced, and the light weight of the tool is realized.

The above examples are only for illustrating the specific embodiments of the present utility model, and the present utility model is not limited to the description scope of the above examples.

Claims

1. Manual hydraulic tool organism, its characterized in that includes:

The pump body is provided with a plurality of air inlets,

The wear-resistant sleeve is fixedly arranged on the pump body,

A clamp head rotatably mounted at one end of the wear-resistant sleeve away from the pump body, and

A piston assembly mounted on the jaw;

Wherein a piston cavity is formed among the pump body, the wear-resistant sleeve and the clamp head,

The piston assembly has:

a piston rod having a piston-extending portion extending into the piston chamber,

A piston mounted on the piston extension and movably disposed within the wear sleeve, an

And the piston spring is arranged between the periphery of the piston extending part and the inner wall of the wear-resistant sleeve.

2. The manual hydraulic tool body according to claim 1, wherein,

Wherein, the material hardness of wear-resisting cover is greater than the material hardness of the pump body.

3. The hand-operated hydraulic tool body of claim 2 wherein,

The wear-resistant sleeve is made of steel, and the pump body is made of aluminum.

4. A hand operated hydraulic tool body according to any one of claims 1-3, further comprising:

A movable handle rotatably arranged on the pump body,

A fixed handle fixedly arranged on the pump body,

An oil storage part arranged in the fixed handle and fixed with the pump body, an oil storage cavity for storing hydraulic oil, and

The plunger assembly is arranged on the pump body;

wherein, set up the plunger chamber that one end was sealed one end open-ended on the pump body, the plunger subassembly has:

a plunger rod having a plunger insertion portion inserted into the plunger chamber and a plunger exposure portion exposed from the plunger chamber,

A plunger sleeve arranged between the periphery of the extending part and the inner wall of the plunger cavity,

The plunger exposed portion is mounted on the movable handle.

5. The manual hydraulic tool body according to claim 4, wherein,

Wherein the plunger rod, the plunger sleeve and the movable handle are made of steel.

6. The manual hydraulic tool body according to claim 5, wherein,

Wherein, set up in the pump body:

an oil inlet channel which is communicated with the oil storage cavity and the plunger cavity and is provided with an oil inlet one-way valve,

An oil outlet passage which is communicated with the plunger cavity and the piston cavity and is provided with an oil outlet one-way valve, and

An oil return passage communicating the piston chamber with the oil reservoir chamber, and having:

A main oil return passage leading to the piston chamber,

A first oil return passage, one end of which is communicated with the main oil return passage, the other end of which is communicated with the oil storage cavity, and an automatic oil return valve is arranged at one end close to the oil storage cavity, and

A second oil return passage including:

A transverse oil duct leading to the oil storage cavity, and

A longitudinal oil passage leading to the main oil return passage,

And the staggered positions of the transverse oil duct and the longitudinal oil duct are provided with oil return steel balls and oil return switches for limiting the oil return steel balls at the staggered positions.

7. A hand-operated hydraulic tool body as claimed in any one of claims 1 to 3, wherein,

Wherein the wear-resistant sleeve is connected with the pump body through threads and fixed through an adhesive, the wear-resistant sleeve is connected with the clamp head through threads in a rotating way and is provided with a limiting piece for limiting the rotating angle between the wear-resistant sleeve and the clamp head,

The clamp head is provided with a limiting hole, the wear-resistant sleeve is provided with an arc-shaped limiting groove corresponding to the limiting hole in the circumferential direction, and the inner end of the limiting piece penetrates through the limiting hole and stretches into the limiting groove.

8. The manual hydraulic tool body according to claim 7, wherein,

Wherein the piston assembly further has:

A piston check ring arranged at one end of the piston cavity away from the piston,

A spring retainer ring fixed at one end of the piston rod close to the piston,

One end of the piston spring is propped against the spring retainer ring, the other end of the piston spring stretches into and is propped against the piston retainer ring, and the piston is fixed on the periphery of the spring retainer ring.

9. A manual hydraulic tool comprising

The machine body is provided with a machine body,

A working part which is arranged on the machine body,

Wherein the body is a manual hydraulic tool body as claimed in any one of claims 1 to 8.

10. The hand operated hydraulic tool of claim 9 wherein the hand operated hydraulic tool comprises,

Wherein, the binding clip has the arc surface, the working piece is through dismantling the subassembly demountable installation on the binding clip, it includes to dismantle the subassembly:

the clamp head pin is detachably inserted on the clamp head;

The handle is fixed at one end of the clamp head pin;

the positioning pin is movably arranged in the positioning hole on the clamp head; and

The positioning spring is arranged in the positioning hole, and one end of the positioning spring acts on the positioning pin;

The clamp head pin is provided with a positioning groove for the outer end of the positioning pin to be inserted, and one side of the handle, facing the clamp head, is provided with an arc positioning surface which is attached to the arc surface.