CN220407862U - Frock clamp and eccentric part processing equipment - Google Patents

Abstract

The embodiment of the application relates to the technical field of fixtures and discloses a fixture and eccentric part processing equipment. This frock clamp includes: a chassis; a rotating mechanism assembled on the chassis; the positioning disc is provided with a first mounting surface and a second mounting surface which are away from each other; a plurality of fixed claws are arranged on the first mounting surface; the second mounting surface is connected to the rotation mechanism. The rotating mechanism can drive the positioning plate to rotate relative to the chassis. The rotary mechanism is additionally arranged, so that the rotary position of the positioning disc relative to the chassis is changed, secondary clamping is not required to be carried out again in the eccentric part machining process, and the production efficiency is effectively improved.

Description

Frock clamp and eccentric part processing equipment

Technical Field

The application relates to the technical field of fixtures, in particular to a fixture and eccentric part machining equipment.

Background

The tool clamp is a device which is widely applied to clamping a workpiece or an object to be processed during production operation, so that the workpiece or the object to be processed can rotate or move along with the workpiece or the object to be processed, and thus corresponding processing procedures are completed. Some typical tool clamps exist, such as three-jaw self-centering chucks.

However, such a work jig has a certain inconvenience in performing eccentric work on a work. The eccentric workpiece processing refers to the process of processing at a plurality of different circle centers of the same workpiece.

Because the traditional three-jaw self-centering chuck cannot change the rotating circle center position of the workpiece after clamping and fixing are completed. Therefore, when machining an eccentric workpiece, it is necessary to disassemble the workpiece after the machining of the first center position is completed and to perform the machining of the other center position after the repositioning.

The defect of such secondary clamping is avoided to suitable frock clamp that needs to provide urgently to effectual promotion production efficiency.

Disclosure of Invention

The application provides a frock clamp and eccentric parts processing equipment can solve current frock clamp and need the defect of secondary clamping when carrying out eccentric work piece processing.

In a first aspect, the present application provides a tool clamp. The tool clamp comprises a chassis; a rotation mechanism mounted to the chassis; the positioning disc is provided with a first mounting surface and a second mounting surface which are away from each other; the first mounting surface is provided with a plurality of fixed claws, the second mounting surface is connected with the rotating mechanism, and the rotating mechanism can drive the positioning disc to rotate relative to the chassis.

In some embodiments, the rotation mechanism comprises: the mechanism shell is connected with the chassis, and the mechanism shell and the chassis are enclosed to form an accommodating space; a gear; the gear is rotatably connected with the mechanism shell; a rack engaged with the gear; the driving assembly is connected with the rack and can drive the rack to move relative to the gear so as to drive the gear to rotate relative to the mechanism shell.

In some embodiments, the rack comprises: the cylinder body is provided with a tooth-shaped surface on one side; the drive assembly includes: the two sleeves are respectively sleeved at two ends of the cylindrical main body, and are of a size matched with the cylindrical main body and form a guide mechanism in a matched mode; the two plugs are connected with the two sleeves in a one-to-one correspondence manner, and a cavity is formed between each plug and the corresponding sleeve; the cavity is provided with an oil inlet.

In some embodiments, the rack comprises a first rack and a second rack, the gear is connected between the first rack and the second rack, and the first rack and the second rack are arranged in parallel; the drive assembly includes: the first driving assembly and the second driving assembly are respectively provided with the two sleeves and the two plugs, and are connected with the first rack, and the second driving assembly is connected with the second rack; the two ends of the first rack are provided with a first cavity and a second cavity, and the two ends of the second rack are provided with a third cavity and a fourth cavity; wherein the first cavity is communicated with the fourth cavity, and the second cavity is communicated with the third cavity.

In some embodiments, the first cavity and the third cavity are on the same side along the length of the first rack, and the second cavity and the fourth cavity are on the same side, such that the first rack and the second rack move in opposite directions.

In some embodiments, a positioning plate connecting portion is disposed at one end of the gear facing away from the chassis, the positioning plate connecting portion extends out of the accommodating space, and the positioning plate connecting portion is connected with the positioning plate.

In some embodiments, the rotation mechanism further comprises: a rotating member accommodated in the accommodation space to rotate following the gear; the frock clamp still includes: and a holding assembly provided in the mechanism housing for applying a force in an axial direction of the chassis to the rotating member when the gear is rotated to a predetermined rotational position.

In some embodiments, the retention assembly comprises: the accommodating cavity is arranged in the mechanism shell along the axis direction and is provided with a top end opening and a bottom end opening which are mutually far away from each other, and the top end opening is an opening deviating from the chassis; the cover body is fixedly connected with the top opening of the accommodating cavity; a piston accommodated in the accommodation chamber and slidable in the axial direction, wherein a portion of the piston protruding from the bottom end opening abuts against the rotating member when the piston moves in a direction approaching the chassis; wherein a fifth cavity is formed between the piston and the cover body; the fifth cavity is provided with an oil filling hole; an elastic element; the elastic element is connected between the piston and the rotating part and applies elastic force to the piston; the elastic force is used for driving the piston to move in a direction away from the chassis.

In some embodiments, at least one of the fixed jaw surfaces is provided with a clamping indication feature; the clamping indicating component is used for determining the clamping direction of the workpiece.

In a second aspect, embodiments of the present application provide an eccentric part processing apparatus. The eccentric part processing apparatus includes: the tool clamp and the equipment host machine are as described above; the chassis of the tool clamp is fixedly connected to a mechanical main shaft of the equipment host.

The frock clamp and at least one advantageous aspect of eccentric part processing equipment thereof that this application embodiment provided is: the rotating mechanism is additionally arranged, so that the rotating position of the positioning disc relative to the chassis can be changed. Therefore, after one of the circle center positions of the workpiece is processed, the circle center processing position of the workpiece can be changed correspondingly directly through the rotating mechanism, and secondary clamping is not needed again, so that the production efficiency is effectively improved.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to scale, unless expressly stated otherwise.

Fig. 1 is a schematic structural diagram of a tooling fixture provided in an embodiment of the present application;

fig. 2 is an exploded structure schematic view of a tooling fixture provided in an embodiment of the present application;

FIG. 3 is a cross-sectional view of a tooling fixture provided in an embodiment of the present application, showing the first through fourth cavities;

FIG. 4 is a schematic view of a part of a mechanism housing of a work fixture provided in an embodiment of the present application, showing a combination of a rotating mechanism and a chassis;

fig. 5 is a schematic diagram of an operating principle of the tooling fixture provided in the embodiment of the present application, which illustrates a situation in a first rotation position;

fig. 6 is a schematic diagram of an operating principle of the tooling fixture provided in the embodiment of the present application, which illustrates a situation in a second rotation position;

fig. 7 is a schematic diagram of the working principle of the tool fixture provided in the embodiment of the application, and shows the situation after the center of mass is adjusted.

Reference numerals illustrate:

10. a chassis;

20. a rotation mechanism; 21. a mechanism housing; 211. a housing chamber; 212. a cover body; 213. a step; 22. a rotating member; 221. a tooth-like structure; 222. a positioning disk connecting part; 23. a rack; 23a, a first rack; 23b, a second rack; 24. a drive assembly; 24a, a first drive assembly; 24. a second drive assembly; 241. a sleeve; 242. a plug; 25. a bearing;

30. a positioning plate; 31. a fixed claw; 311. clamping the indicating component;

40. a retention assembly; 41. a piston; 42. an elastic element;

51. a limit protrusion;

52. and (5) rotating the disc.

Detailed Description

The following detailed description of the present application in conjunction with specific embodiments, it should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the present application and its applications.

It is noted that unless explicitly specified and limited otherwise, the terms "center", "longitudinal", "transverse", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc., as used in this specification are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. The terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated; thus, a feature defining "a first", "a second" may include one or more such features, either explicitly or implicitly; the meaning of "plurality" is two or more; "and/or" includes any and all combinations of one or more of the associated listed items. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

Fig. 1 is a schematic structural diagram of a tooling fixture according to an embodiment of the present application. As shown in fig. 1, the tool fixture includes: chassis 10, rotation mechanism 20, and puck 30.

The chassis 10 is fixedly mounted on a machine spindle of a processing apparatus such as a machine tool, and the machine spindle is a shaft for driving a workpiece or a tool to rotate on the machine tool. Which may be specifically designed to any suitable type of size or configuration, as desired for the application, and is not specifically limited herein.

The rotation mechanism 20 is provided on the chassis 10. Which has a portion rotatable relative to the chassis. For ease of description, this may also be referred to herein as a "rotating portion". The rotating portion of the rotary mechanism 20 may be rotated between two or more rotational positions to meet the need for machining a workpiece at a plurality of different centers. The "rotational position" refers to a position where the rotating portion is rotated to a certain angle and can be locked and fixed during the processing of the workpiece. In the present embodiment, the rotational position may be set to two or more, and may be exemplarily named as "first", "second", and the like, respectively, for distinction.

The positioning disk 30 is provided on the rotation mechanism 20. Herein, the "first mounting surface" and the "second mounting surface" are used for convenience of description to refer to two end surfaces of the puck 30 that face away from each other in the axial direction, respectively.

On the one hand, a plurality of fixing claws 31 are provided on the first mounting surface of the puck 30. The fixing claws 31 can be matched with each other to form a clamping station for clamping and fixing a workpiece. Illustratively, three fixed jaws 31 are shown in FIG. 1. Specifically, a clamping indication member 311 may be disposed on a surface of at least one of the fixing claws 31 to help determine a clamping direction of the workpiece. For example, the clamping indicator 311 may be diamond pins that mate with process holes in the workpiece. Alternatively, other types, sizes or shapes of protruding structures that can be matched with the workpiece can be adopted, and only the requirement of indicating the clamping direction needs to be met, which is not limited in detail herein.

On the other hand, the second mounting surface of the puck 30 is rigidly connected to the aforementioned rotating portion 22. In this context, "rigidly connected" means that no relative rotation or movement between the two components takes place, and that torques or torques can be transmitted smoothly between each other.

In actual use, the workpiece to be machined may first be clamped and secured to the clamping station by the securing jaw 31 (e.g., the securing jaw is manually controlled to tighten the workpiece by a four-room wrench). At this time, the rotation mechanism 20 is locked and held at the first rotation position.

Then, after one of the circle centers of the work piece to be processed is processed, the rotation mechanism 20 may be unlocked and locked again after the rotation member 22 is driven to rotate from the first rotation position to the second rotation position. At this time, the position of the positioning disk 30 is correspondingly moved along with the rotation of the rotating member 22, so that the center of rotation of the workpiece to be processed is changed.

Finally, the workpiece to be processed continues to be processed at the other circle center position, and is detached from the clamping station after the processing is completed.

It can be seen from the above description that when the workpiece to be machined needs to be machined at two circle center positions (in other embodiments, the workpiece can be machined by the aid of the eccentric workpiece), the workpiece is not required to be clamped secondarily, and only the rotating mechanism is required to be controlled to rotate, so that the production efficiency of the workpiece is greatly improved.

Fig. 2 is a schematic structural diagram of a rotating mechanism 20 according to an embodiment of the present application. As shown in fig. 2, the rotation mechanism 20 includes: a mechanism housing 21, a rotating member 22, a rack 23, and a drive assembly 24.

The mechanism housing 21 is covered on the chassis 10, and forms a housing space with the chassis 10. The mechanism housing 21 may be selected from any suitable type of size or shape as desired in practice, and is not specifically limited herein.

The rotating member 22 is rotatably connected to the mechanism housing 21, and the rotating member 22 is at least partially accommodated in the accommodating space. "rotatably" means a connection between two components that permits relative rotation. Specifically, as shown in fig. 2, the mechanism housing 21 and the rotating member 22 are connected by a bearing 25, so that the rotating member 22 can rotate relative to the mechanism housing 21.

With continued reference to fig. 2, the rotating member 22 includes a gear 221, the gear 221 is disposed in the accommodating space, and external teeth are disposed on an outer side surface of the gear 221.

The rack 23 is provided in the housing space, and the rack 23 is movable with respect to the aforementioned rotating member 22. In the present embodiment, "movement" means linear motion in a certain direction. The rack 23 may be intermeshed with the gear 221 of the rotating member 22 to cooperatively form a transmission mechanism, and the circumferential rotation of the gear 221 is driven by the linear movement of the rack 23.

The driving assembly 24 is a device for providing driving force to the rack 23 in cooperation with the rack 23. Which may be based on any suitable type of drive principle, the drive assembly 24 may drive the rack 23 to move relative to the mechanism housing 21.

In some embodiments, as shown in fig. 3, the racks 23 may be provided in pairs, including a first rack 23a and a second rack 23b. The gear 221 is located between the first rack 23a and the second rack 23b. The first rack 23a and the second rack 23b are movable in opposite directions to drive rotation of the gear 221.

Specifically, the aforementioned drive assembly 24 includes a first drive assembly 24a and a second drive assembly 24b. Wherein, the first driving assembly 24a forms a first cavity Q1 and a second cavity Q2 at both ends of the first rack 23a, respectively. The second driving assembly 24b forms a third cavity Q3 and a fourth cavity Q4 at both ends of the second rack 23b, respectively. The first cavity Q1 and the fourth cavity Q4 are communicated, and the second cavity Q2 and the third cavity Q3 are communicated. Thus, the aforementioned effect of driving the first rack 23a and the second rack 23b to move in opposite directions can be achieved by filling the first cavity Q1 or the fourth cavity Q4 with oil.

It should be noted that the rack 23 is not limited to a specific shape or structure of the member, and may have a tooth surface capable of being engaged with the tooth structure and having a certain length. As shown in fig. 2 and 4, the body of the rack 23 may be generally cylindrical, with a toothed surface on one side of the cylinder that engages the rotating member, for example. Correspondingly, the drive assembly 24 includes a sleeve 241 and a plug 242. The sleeve 241 is sleeved at the tail end of the cylindrical rack 23 and has a size matched with that of the cylindrical main body, so that the sleeve 241 is matched with the cylindrical main body to form a guide mechanism, and the guide mechanism plays a guide role. A plug 242 is fixedly connected to the other end of the sleeve 241, which can close the sleeve 241 to form the aforementioned cavity for oil injection and pressure application. Alternatively, the sleeve 241 and the plug 242 may be integrally formed, or the sleeve 241 having one end opened and the other end closed may be directly used instead of the plug 242.

Fig. 4 is a schematic structural diagram of a rotating member according to an embodiment of the present application. As shown in fig. 4, the end of the gear 221 facing away from the chassis 10 is further provided with a positioning plate connecting portion 222, and the positioning plate connecting portion 222 extends out of the accommodating space. Alternatively, the positioning plate connecting portion 222 may be connected to the second mounting surface of the positioning plate 30 by a key, so that the rotating member 22 drives the positioning plate 30 to rotate.

In other embodiments, with continued reference to fig. 2 and 4, the tool clamp may include additional retention assemblies 40 in addition to the structural components previously described. The holding assembly 40 is disposed in the mechanism housing 21 and is capable of applying a force to the rotating member 22 in the axial direction of the chassis 10, thereby enabling the rotatable portion of the tool clamp to be more firmly held on the chassis 10 without unnecessary movement during machining. Herein, "hold" means: a force is applied that causes the two components to be tightly bound together to counter the external force. In particular, the holding assembly 40 may also be provided in plural numbers to apply a sufficient pressure. For example two as shown in fig. 4.

Specifically, with continued reference to fig. 2 and 4, the retention assembly 40 includes: a housing cavity 211, a cover 212, a piston 41 and an elastic element 42.

Wherein, the accommodating cavity 211 is arranged in the mechanism shell along the axial direction. The two end openings thereof located away from each other may be named "top end opening" and "bottom end opening", respectively. Wherein the top opening refers to the opening facing away from the chassis 10. The bottom opening is the opening at the end near the bottom plate. The cover 212 may be fixedly coupled to the top opening by means of a fixing bolt or the like, thereby closing the top opening.

The piston 41 is accommodated in the accommodation chamber 211. The inner wall shape of the entire housing chamber 211 is adapted to the outer side wall shape of the piston 41, and the piston 41 is movable in the axial direction thereof with respect to the mechanism housing 21. In some embodiments, the bottom end opening is provided with a step 213. The step 213 abuts the piston 41 when the piston 41 is moved into position, thereby restricting the piston from being disengaged from the bottom end opening.

A fifth cavity Q5 is formed between the piston 41 and the cover 212 for oil injection. Alternatively, the cover 212 may be any other suitable type of closure structure, so long as the top opening is closed and the fifth cavity Q5 is formed.

Alternatively, the first to fifth cavities may be provided with associated oil control components, including but not limited to oil filling holes, oil drain holes, pressure relief valves, pressure sensors, and the like. The specific setting positions of the oil control related components, the pipeline setting mode and the like can be set according to the actual situation, and only the actual oil pressure driving use needs need to be met, and the detailed description is omitted.

A resilient element 42 is connected between the piston 41 and the rotating part 22, the resilient element 42 being able to exert a resilient force to urge the piston 41 in a direction away from the chassis. The elastic element 42 may in particular be any suitable type of elastic member. The elastic member 42 may be, for example, a belleville spring, and is fitted over the piston 41.

In actual use, the piston 41 is subjected to elastic force in the initial state, and does not exert pressure on the rotating member 22. When the positioning plate is rotated in place, the piston 41 is driven to move in a direction approaching the chassis 10 by injecting oil into the fifth cavity Q5, and after the piston 41 moves in place, the piston 41 can abut against a part of the structure of the rotating member 22 (the rotating plate 52 is taken as an example in fig. 2), so that pressure is applied to the rotating member 22 and the rotating member is held on the chassis 10.

Another embodiment of the present application also provides an eccentric part processing apparatus. The eccentric part machining device can be a machine tool or other similar machining devices, and comprises the tool fixture and the device host machine. The chassis of the tool clamp is fixedly connected to a mechanical main shaft of the equipment host machine, and can rotate around two or more different circle centers under the drive of the mechanical main shaft, so that eccentric part machining is realized.

In order to fully explain the inventive concept of the tool clamp in the embodiment of the present application, a specific process of machining an eccentric part is described in detail below by taking a first rotation position and a second rotation position as examples.

First, oil is injected into the first cavity Q1 and the fourth cavity Q4 through the oil injection port, and the positioning disk 30 is driven to rotate to the first rotation position by the rack gear formed by the rack 23 and the rotating member 22.

The puck 30 that has been rotated to the first rotational position can stop from continuing to rotate under the influence of a stop such as a block or other similar stop structure. At this time, the injection of oil into the first and fourth cavities Q1 and Q4 is continued until a preset pressure value is reached, ensuring that the puck 30 can be locked in the first rotational position.

Next, the oil is injected into the fifth cavity Q5 through the additional oil injection port, and the piston 41 moves in a direction approaching the chassis 10 against the elastic force applied by the elastic member 42 as the oil pressure increases, thereby applying pressure to the rotating disc 52, and thus the entire positioning disc can be tightly held on the chassis 10. Then, the equipment host machine completes the processing of the first circle center position of the workpiece to be processed by controlling the rotation of the mechanical main shaft.

And thirdly, after the processing of the first circle center position is completed, the oil in the fifth cavity Q5 is released through the oil drain port. The piston 41 returns by the elastic member 42 as the oil pressure decreases, and no pressure is applied.

Subsequently, oil is injected into the second cavity Q2 and the third cavity Q3 through the oil injection port, and the positioning disk 30 is rotated to the second rotation position by the rack gear formed by the rack 23 and the rotating member 22. Similarly, the puck 30 that rotates to the second rotational position can also stop continuing to rotate under the influence of a stop such as a block or other similar stop structure. At this time, the injection of oil into the second and third cavities Q2 and Q3 is continued until a preset pressure value is reached, ensuring that the puck 30 can be locked in the second rotational position.

Finally, after the second cavity Q2 and the third cavity Q3 reach the preset pressure value, the oil is injected into the fifth cavity Q5 through the oil injection port, and the piston 41 overcomes the elastic force exerted by the elastic element 42 along with the increase of the oil pressure and moves towards the direction approaching to the chassis 10, so that the pressure is exerted on the rotating disc 52, and the whole positioning disc can be tightly kept on the chassis 10. Then, the equipment host machine completes the processing of the second circle center position of the workpiece to be processed by controlling the rotation of the mechanical main shaft.

For example, with continued reference to fig. 2 and 4, the aforementioned limiting structure may be specifically formed by the cooperation of the limiting protrusion 51 and the rotating disc 52. The limit projection 51 may be provided with two, respectively designated as 51a and 52b, corresponding to the aforementioned first rotational position and second rotational position. The rotary disk 52 is suitably provided with two arcuate projections 52a and 52b at its circumferential edge. The rotary disk 52, as part of the rotary member 20, can move with the gear 221. The limit projection 51 is fixed to the chassis 10.

In actual use, when in the first rotation position, the limiting protrusion 51a will abut against the arc-shaped protrusion 52a of the rotating disc 52, so as to prevent the rotating disc 52 from continuing to rotate, and further limit the rotating member 22 from continuing to rotate in the same direction. Vice versa, when rotating reversely to the second rotation position, the limit projection 51b will abut against the arc-shaped projection 52b of the rotating disk to prevent the rotating member 22 from continuing to rotate in the same direction.

Taking fig. 5 and 6 as an example, a detailed description will be given of a corresponding rotation process of the workpiece to be processed and the puck 30. As shown in fig. 5 and 6, O1 and O3 are two machining centers in the workpiece to be machined.

The center of rotation of the first rotational position of the positioning disk 30 of the fixture, the center of rotation of the machine spindle, and O1 coincide, and the center of rotation of the second rotational position of the positioning disk 30 of the fixture coincides with O3.

After the machining of the part to be machined of the machining center O1 is completed, the positioning disc 30 can rotate the workpiece with O2 as the center and a as the radius counterclockwise by b degrees and then coincide with the rotating center of the main shaft of the machine tool, and the machining of the other part to be machined is continued.

Preferably, the method of adjusting the integral mass center of the fixture tool and the workpiece to be processed can be further increased to reduce the influence of the centrifugal force of the workpiece to be processed on the cutting of the cutter as far as possible when the mechanical main shaft rotates. Illustratively, as shown in fig. 7, the mass center of the whole of the fixture clamping the workpiece to be machined can be moved to the center of the circle O4 by adjusting the mass of one or more structural members in the fixture. Wherein the O4O2 line segment coincides with the midpoint of the O3O1 line segment.

It should be noted that one or more of the structural components disclosed in the above embodiments may be omitted or added as needed in actual situations to provide corresponding functions or technical effects. The above structural components are not mutually exclusive or interrelated and may be used in any combination to form a plurality of different embodiments.

The foregoing is a further detailed description of the present application in connection with specific/preferred embodiments, and it is not intended that the specific implementation of the present application be limited to such description. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model, and these are all within the scope of the utility model.

Claims (10)

1. A kind of frock clamp; characterized by comprising the following steps:

a chassis;

a rotation mechanism mounted to the chassis;

the positioning disc is provided with a first mounting surface and a second mounting surface which are away from each other; the first mounting surface is provided with a plurality of fixed claws, the second mounting surface is connected with the rotating mechanism, and the rotating mechanism can drive the positioning disc to rotate relative to the chassis.

2. The tool clamp according to claim 1, wherein the rotation mechanism comprises:

the mechanism shell is connected with the chassis, and the mechanism shell and the chassis are enclosed to form an accommodating space;

a gear; the gear is rotatably connected with the mechanism shell;

a rack engaged with the gear;

the driving assembly is connected with the rack and can drive the rack to move relative to the gear so as to drive the gear to rotate relative to the mechanism shell.

3. The tool clamp of claim 2, wherein the rack comprises: a cylindrical body and a toothed surface; the tooth-shaped surface is arranged on one side of the cylindrical main body;

the drive assembly includes:

the two sleeves are respectively sleeved at two ends of the cylindrical main body, and are of a size matched with the cylindrical main body and form a guide mechanism in a matched mode;

the two plugs are connected with the two sleeves in a one-to-one correspondence manner, and a cavity is formed between each plug and the corresponding sleeve; the cavity is provided with an oil inlet.

4. The tool clamp according to claim 3, wherein the racks comprise a first rack and a second rack, the gear is connected between the first rack and the second rack, and the first rack and the second rack are arranged in parallel;

the drive assembly includes: the first driving assembly and the second driving assembly are respectively provided with the two sleeves and the two plugs, and are connected with the first rack, and the second driving assembly is connected with the second rack;

the two ends of the first rack are provided with a first cavity and a second cavity, and the two ends of the second rack are provided with a third cavity and a fourth cavity;

wherein the first cavity is communicated with the fourth cavity, and the second cavity is communicated with the third cavity.

5. The tool clamp according to claim 4, wherein,

along the length direction of the first rack, the first cavity and the third cavity are positioned on the same side, and the second cavity and the fourth cavity are positioned on the same side, so that the first rack and the second rack move in opposite directions.

6. The tool clamp according to claim 2, wherein a positioning disc connecting portion is arranged at one end of the gear, which is away from the chassis, and extends out of the accommodating space, and the positioning disc connecting portion is connected with the positioning disc.

7. The tool clamp of claim 2, wherein the rotation mechanism further comprises: a rotating member accommodated in the accommodation space to rotate following the gear;

the frock clamp still includes:

and a holding assembly provided in the mechanism housing for applying a force in an axial direction of the chassis to the rotating member when the gear is rotated to a predetermined rotational position.

8. The tool clamp of claim 7, wherein the retaining assembly comprises:

the accommodating cavity is arranged in the mechanism shell along the axis direction and is provided with a top end opening and a bottom end opening which are mutually far away from each other, and the top end opening is an opening deviating from the chassis;

the cover body is fixedly connected with the top opening of the accommodating cavity;

a piston accommodated in the accommodation chamber and slidable in the axial direction, wherein a portion of the piston protruding from the bottom end opening abuts against the rotating member when the piston moves in a direction approaching the chassis;

wherein a fifth cavity is formed between the piston and the cover body; the fifth cavity is provided with an oil filling hole;

an elastic element; the elastic element is connected between the piston and the rotating part and applies elastic force to the piston; the elastic force is used for driving the piston to move in a direction away from the chassis.

9. The tool clamp according to claim 1, wherein at least one of the fixed jaw surfaces is provided with a clamping indication member; the clamping indicating component is used for determining the clamping direction of the workpiece.

10. An eccentric part machining device, which is characterized by comprising the tool clamp as claimed in any one of claims 1-9 and a device host;

the chassis of the tool clamp is fixedly connected to a mechanical main shaft of the equipment host.