CN110039328B

CN110039328B - Hydraulic clamp holder

Info

Publication number: CN110039328B
Application number: CN201910493385.2A
Authority: CN
Inventors: 汪传宏
Original assignee: Chongqing Honggang CNC Machine Tool Co Ltd
Current assignee: Chongqing Honggang CNC Machine Tool Co Ltd
Priority date: 2019-06-06
Filing date: 2019-06-06
Publication date: 2020-05-08
Anticipated expiration: 2039-06-06
Also published as: CN110039328A

Abstract

The invention discloses a hydraulic clamp holder in the field of machine tool clamp holders, which comprises a base, wherein a chute is arranged on the base, grooves are respectively arranged on the side walls of the chute, an electromagnet is embedded at the bottom of each groove, a clamping block which is connected to the base in a sliding mode is arranged in each groove, the sliding direction of each clamping block is perpendicular to the length direction of the chute, a permanent magnet is embedded in one surface, facing the electromagnet, of each clamping block, the base is also connected with a double-pole double-throw switch which is connected in series in a power supply circuit of the electromagnet, and a hydraulic mechanism for driving the clamping blocks to slide and driving the double-pole double-throw switch. The hydraulic clamp provided by the invention can solve the problem that the existing hydraulic clamp has low response speed and cannot meet the use requirement of a machine tool.

Description

Hydraulic clamp holder

Technical Field

The invention relates to the field of machine tool holders, in particular to a hydraulic holder.

Background

The numerical control machine tool is a flexible and high-efficiency automatic machine tool, represents the development direction of the modern machine tool control technology, and comprises a plurality of sliding components, such as a tailstock, a saddle, a tool rest and the like, wherein the components are connected on a guide rail in a sliding manner, and the components are required to be accurately positioned to ensure the accurate processing of a workpiece while sliding. The hydraulic driving mode has the problems of low response speed, frictional wear, high maintenance cost, poor high-speed clamping effect and the like, can not well adapt to the use requirements of machine tools which are gradually developed, and particularly for machine tools with high requirements on part of machining precision and high production cost, the traditional hydraulic clamp can not meet the requirements.

Disclosure of Invention

The invention aims to provide a hydraulic clamp holder to solve the problem that the existing hydraulic clamp holder is slow in response speed and cannot meet the use requirement of a machine tool.

In order to achieve the purpose, the basic technical scheme of the invention is as follows: the utility model provides a hydraulic clamp holder, which comprises a base, be equipped with the spout on the base, all be equipped with the recess on the lateral wall of spout, the bottom of recess is inlayed and is equipped with the electro-magnet, be equipped with the grip block of sliding connection on the base in the recess, the length direction of the slip direction perpendicular to spout of grip block, the grip block inlays towards the one side of electro-magnet and is equipped with the permanent magnet, the base still is connected with the double-pole double-throw switch of establishing ties in the electro-magnet power return circuit, still be equipped with the hydraulic pressure mechanism that is used for driving the grip block and slides and.

The principle and the advantages of the scheme are as follows: the base is the main part of holder, and the spout is the mounting structure who corresponds the lathe guide rail on the holder, and the base is detained and is covered on the guide rail during the use, and the guide rail passes through from the spout. The groove is used for accommodating the clamping block and the electromagnet, the clamping block is used for clamping the guide rail to complete the positioning of the machine tool assembly, the electromagnet and the permanent magnet are used for driving the clamping block to move as electromagnetic power, the double-pole double-throw switch is used for changing the current direction as the power control of the electromagnet, further the magnetic pole direction of the electromagnet is changed, so that the electromagnet and the permanent magnet are matched to generate the pushing and pulling actions on the clamping block, the hydraulic mechanism is used for driving the clamping block as hydraulic power, meanwhile, the hydraulic mechanism is used for driving the double-pole double-throw switch, the double-pole double-throw switch is operated in the driving process of the clamping block through the hydraulic mechanism, further the electromagnetic power is controlled, and thus the clamping block is driven by combining the hydraulic power and the electromagnetic power, the action response speed of the clamp is improved, the stable and reliable clamping action of the clamp is ensured, and the positioning effect, compared with the traditional hydraulic clamp holder, the hydraulic clamp holder has the advantages of high positioning precision and more accurate positioning precision after long-time use, can meet the requirement of high-precision positioning of a machine tool, and is more suitable for market requirements.

Furthermore, the hydraulic mechanism comprises a control cavity and a driving cavity, a control piece for controlling the double-pole double-throw switch is arranged in the control cavity, a driving piece for driving the clamping block is arranged in the driving cavity, the control cavity and the driving cavity are communicated through an oil way, and oil inlets of the control cavity and the driving cavity are larger than oil outlets. The hydraulic power split control device is used as an optimal control cavity for accommodating a control piece and dividing hydraulic power for controlling the double-pole double-throw switch, the driving cavity is used for accommodating a driving piece and converting the hydraulic power for driving the clamping block, and the oil inlet is larger than the oil outlet, so that the control cavity and the driving cavity can keep a positive pressure state in a hydraulic pressurization process, the control piece and the driving piece can effectively act, and the stable and reliable action of the control piece and the driving piece is ensured.

Furthermore, the control part is a push plate sliding in the control cavity, a sealing part is arranged between the side end of the push plate and the side wall of the control cavity, the push plate is fixedly connected with a push rod, the push rod penetrates through the base to be connected with a knife switch of the double-pole double-throw switch, a spring is sleeved on the push rod positioned between the push plate and the side wall of the control cavity, and an oil inlet and an oil outlet of the control cavity are both positioned at the end part of the control cavity, away from the push. As preferred push pedal, convert hydraulic pressure into the displacement and then drive the plug-in strip action as power transmission spare, the sealing member is used for guaranteeing the pressure stability that the push pedal received, and the push rod transmits the displacement for the plug-in strip as transmission structure, and the spring can order about the push pedal after removing hydraulic pressure and reset and then let the plug-in strip reset as the power spare that resets of push pedal, and the position setting of oil inlet and oil-out makes control intracavity space divide rationally, and the push pedal can effectual action.

Further, an extension handle is fixed on the knife switch, a long circular hole is formed in the extension handle, a pin rod penetrating through the long circular hole is integrally formed on the push rod, and the swing angle of the knife switch is 90 degrees. Preferably, the linear displacement of the push rod acts on the long round hole through the pin rod, and further force transmission is completed through movement of the pin rod relative to the extension handle in the long round hole, so that the extension handle can swing to drive the switch blade to complete switching of the double-pole double-throw switch.

Further, the driving piece is a top plate which slides in the driving cavity, a sealing piece is also arranged between the side end of the top plate and the side wall of the driving cavity, at least two ejector rods are fixedly connected to the top plate, the ejector rods penetrate through the grooves and are fixedly connected with the clamping blocks, and the oil inlet and the oil outlet of the driving cavity are arranged at the end portion, deviating from the ejector rods, of the driving cavity. As the optimized top plate is used as a hydraulic power transmission piece, hydraulic power is transmitted to the ejector rods to form displacement, the ejector rods are used for driving the clamping blocks, and the stability and the accurate guiding of the actions of the clamping blocks can be effectively guaranteed due to the design of the plurality of ejector rods.

Furthermore, the ejector rods are uniformly distributed on the outer side of the permanent magnet along the circumferential direction. Preferably, the clamping block can stably act under the action of electromagnetism or hydraulic pressure, the clamping block cannot deflect in the action process, good surface contact can be performed between the clamping block and the guide rail, and the clamping block is prevented from deflecting to cause accelerated abrasion.

Furthermore, the sealing element is a rubber sealing ring embedded on the push plate and the top plate. Preferably, such a seal has a good sealing effect and is low in cost.

Furthermore, the ejector rod is detachably and fixedly connected with the clamping block. The clamping block is convenient to replace or maintain as an optimal selection, the whole clamping block does not need to be replaced, and the maintenance and the replacement are convenient.

Furthermore, a buffer spring is movably sleeved on the ejector rod between the bottom wall of the groove and the clamping block. Preferably, the buffer spring can buffer the impact between the clamping block and the electromagnet in the process that the clamping block is attracted by the electromagnet, so that the acting force on the clamping block and the electromagnet is reduced, and the collision noise and the collision damage existing in the long-time use process are avoided.

Furthermore, detachable fixed connection sets up radial through-hole for on the ejector pin, and the ladder screw hole has been seted up to the side of grip block, and the threaded hole of ladder is equipped with hexagon socket head cap screw, sets up the jack that corresponds with the ejector pin on the lateral wall of grip block orientation electro-magnet, jack and ladder screw hole intercommunication, and the side of grip block is equipped with along the scale of thickness direction. Can effectually accomplish the ejector pin and be connected of grip block under the complete condition of assurance grip block and guide rail contact surface like this as the preferred, and connect the operation of being convenient for from the side, can not receive the impact and produce not hard up, the scale of side can be used to the contrast monitoring to grip block degree of wear.

Drawings

FIG. 1 is a bottom sectional view of a susceptor in embodiment 1 of the present invention;

fig. 2 is a circuit diagram of the connection between the electromagnet and the double-pole double-throw switch in embodiment 1 of the present invention;

fig. 3 is a schematic view of a connection structure of the carrier rod and the clamping block in embodiment 2 of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a base 1, a control cavity 2, a push plate 3, a push rod 4, a spring 5, a knife switch 6, a driving cavity 7, a top plate 8, a push rod 9, a buffer spring 10, a groove 11, a clamping block 12, a permanent magnet 13, a sealing element 14, a long round hole 15, an extension handle 16, an electromagnet 17, a sliding groove 18, a stepped threaded hole 19, an inner hexagonal bolt 20 and an insertion hole 21.

Example 1, substantially as shown in figure 1: the utility model provides a hydraulic clamp holder, includes base 1, is equipped with spout 18 on the base 1, all is equipped with recess 11 on the lateral wall of spout 18, and the bottom of recess 11 is inlayed and is equipped with electro-magnet 17, is equipped with clamping block 12 of sliding connection on base 1 in the recess 11, and the sliding direction of clamping block 12 is perpendicular to the length direction of spout 18. A permanent magnet 13 is embedded on one surface of the clamping block 12 facing the electromagnet 17, and the base 1 is further connected with a double-pole double-throw switch which is connected in series in a power circuit of the electromagnet 17 through screws, and a circuit diagram is shown in fig. 2. A hydraulic mechanism for driving the clamping block 12 to slide and driving the double-pole double-throw switch to switch is also arranged in the base 1.

The hydraulic mechanism comprises a control cavity 2 and a driving cavity 7, a control piece for controlling the double-pole double-throw switch is arranged in the control cavity 2, a driving piece for driving the clamping block 12 is arranged in the driving cavity 7, the control cavity 2 and the driving cavity 7 are communicated through an oil way, and oil inlets of the control cavity 2 and the driving cavity 7 are larger than oil outlets.

The control piece is a push plate 3 sliding in the control cavity 2, a sealing piece 14 is arranged between the side end of the push plate 3 and the side wall of the control cavity 2, a push rod 4 is integrally formed on the push plate 3, the push rod 4 penetrates through the base 1 to be connected with a switch blade 6 of the double-pole double-throw switch, an extension handle 16 is fixed on the switch blade 6, an oblong hole 15 is formed in the extension handle 16, and a pin rod penetrating in the oblong hole 15 is integrally formed on the push rod 4. The spring 5 is sleeved on the push rod 4 between the push plate 3 and the side wall of the control cavity 2, and the oil inlet and the oil outlet of the control cavity 2 are both located at the end part of the control cavity 2 departing from the push rod 4. The swinging angle of the knife switch 6 is 90 degrees.

The driving piece is a top plate 8 sliding in the driving cavity 7, a sealing piece 14 is also arranged between the side end of the top plate 8 and the side wall of the driving cavity 7, and the sealing piece 14 is a rubber sealing ring embedded on the push plate 3 and the top plate 8. Two ejector rods 9 are integrally formed on the top plate 8, the ejector rods 9 are uniformly distributed on the outer side of the permanent magnet 13 along the circumferential direction, and the ejector rods 9 penetrate into the grooves 11 and are fixedly bonded with the clamping blocks 12. An oil inlet and an oil outlet of the driving cavity 7 are both arranged at the end part of the driving cavity 7 departing from the ejector rod 9. The clamping block 12 is connected with the base 1 in a sliding way, and the mandril 9 penetrates into the groove 11 and is fixedly connected with the clamping block 12.

The specific implementation process is as follows: when not carrying out the centre gripping, do not provide hydraulic pressure, control chamber 2, all there is not the malleation in oil circuit and the drive chamber 7, push pedal 3 in the control chamber 2 is located the middle part of control chamber 2 under spring 5's effect, push pedal 3 drives push rod 4 and accomodates in control chamber 2, push rod 4 drives double-pole double-throw switch's plug-in strip 6 is located one end all the time and makes electro-magnet 17 circular telegram, the magnetic pole direction after electro-magnet 17 circular telegram and the permanent magnet 13 on the grip block 12 inhale mutually this moment, electro-magnet 17 adsorbs permanent magnet 13, and then make grip block 12 accomodate in recess 11.

When carrying out the centre gripping, provide hydraulic pressure, hydraulic medium gets into control chamber 2 earlier, because the oil-out of control chamber 2 is less than the oil inlet, hydraulic medium piles up in control chamber 2, and accumulational hydraulic medium forms positive pressure to push pedal 3, and push pedal 3 overcomes the elasticity of spring 5 along with hydraulic pressure increase and pushes away push rod 4 outside control chamber 2. The outward movement of the push rod 4 is transmitted to the pin rod, the pin rod drives the extension handle 16 and the switch blade 6 to swing under the limitation of the long round hole 15 on the extension handle 16, the switch blade 6 is guided from one end of the switch to the other end due to the increase of hydraulic pressure, the direction change of current in a loop of the electromagnet 17 is further completed, the magnetic pole direction of the electromagnet 17 is changed, and repulsive force is generated between the electromagnet 17 and the permanent magnet 13. Since the electromagnet 17 is fixed on the base 1, the permanent magnet 13 is mounted on the sliding clamping block 12, and then the electromagnet 17 pushes the clamping block 12 to the guide rail, so that the clamping block 12 clamps the guide rail. After hydraulic medium gets into drive chamber 7 from control chamber 2, because the oil-out of drive chamber 7 is less than the oil inlet equally, hydraulic medium piles up in drive chamber 7, accumulational hydraulic medium forms positive pressure to roof 8, roof 8 passes through ejector pin 9 and transmits hydraulic pressure for grip block 12, it strengthens to supply to the tight centre gripping of propping between grip block 12 and the guide rail, the grip block 12 action of electromagnetic force drive is quick, the grip block 12 action of hydraulic pressure drive is stable, form the dual function of electromagnetic force and hydraulic pressure like this, realize the stable and reliable centre gripping of holder to the guide rail.

In embodiment 2, as shown in fig. 3, in this embodiment, the ejector rod 9 and the clamping block 12 are detachably and fixedly connected, the detachable and fixed connection is that a radial through hole is formed in the ejector rod 9, a stepped threaded hole 19 is formed in a side end of the clamping block 12, an inner hexagonal bolt 20 is arranged in the stepped threaded hole 19, an insertion hole 21 corresponding to the ejector rod 9 is formed in a side wall of the clamping block 12 facing the electromagnet 17, the insertion hole 21 is communicated with the stepped threaded hole 19, and a scale is arranged on a side end of the clamping block 12 along a thickness direction. A buffer spring 10 is movably sleeved on the mandril 9 between the bottom wall of the groove 11 and the clamping block 12. The dismounting replacement or the maintenance of the clamping block 12 are convenient for, the connection between the ejector rod 9 and the clamping block 12 can be effectively completed under the condition that the clamping block 12 and the contact surface of the guide rail are complete, the operation is convenient to connect from the side end, the looseness caused by impact cannot be generated, and the scale of the side end can be used for comparing and monitoring the abrasion degree of the clamping block 12. The buffer spring 10 can buffer the impact between the clamping block 12 and the electromagnet 17 in the process that the clamping block 12 is attracted by the electromagnet 17, reduce the acting force on the clamping block 12 and the electromagnet 17, and avoid collision noise and collision damage in the long-time use process.

Claims

1. The utility model provides a hydraulic clamp holder, includes the base, is equipped with the spout on the base, all is equipped with the recess on the lateral wall of spout, and the bottom of recess is inlayed and is equipped with electro-magnet, its characterized in that: the groove is internally provided with a clamping block which is connected to the base in a sliding manner, the sliding direction of the clamping block is perpendicular to the length direction of the sliding groove, a permanent magnet is embedded in one surface of the clamping block facing the electromagnet, the base is further connected with a double-pole double-throw switch which is connected in series in a power supply loop of the electromagnet, and a hydraulic mechanism which is used for driving the clamping block to slide and driving the double-pole double-throw switch to switch is further arranged in the base.

2. A hydraulic clamp according to claim 1 wherein: the hydraulic mechanism comprises a control cavity and a driving cavity, a control piece for controlling the double-pole double-throw switch is arranged in the control cavity, a driving piece for driving the clamping block is arranged in the driving cavity, the control cavity and the driving cavity are communicated through an oil way, and oil inlets of the control cavity and the driving cavity are larger than oil outlets.

3. A hydraulic clamp according to claim 2 wherein: the control piece is a push plate sliding in the control cavity, a sealing piece is arranged between the side end of the push plate and the side wall of the control cavity, the push plate is fixedly connected with a push rod, the push rod penetrates through the base to be connected with a knife switch of the double-pole double-throw switch, a spring is sleeved on the push rod located between the push plate and the side wall of the control cavity, and an oil inlet and an oil outlet of the control cavity are both located at the end, away from the push rod, of the control.

4. A hydraulic clamp according to claim 3 wherein: an extension handle is fixed on the knife switch, a long circular hole is formed in the extension handle, a pin rod penetrating through the long circular hole is integrally formed on the push rod, and the swing angle of the knife switch is 90 degrees.

5. A hydraulic clamp according to claim 4 wherein: the driving piece is a top plate which slides in the driving cavity, a sealing piece is also arranged between the side end of the top plate and the side wall of the driving cavity, at least two ejector rods are fixedly connected to the top plate, the ejector rods penetrate through the grooves and are fixedly connected with the clamping blocks, and the oil inlet and the oil outlet of the driving cavity are arranged at the end part of the driving cavity, which is far away from the ejector rods.

6. A hydraulic clamp according to claim 5 wherein: the ejector rods are uniformly distributed on the outer side of the permanent magnet along the circumferential direction.

7. A hydraulic clamp according to claim 6 wherein: the sealing element is a rubber sealing ring embedded on the push plate and the top plate.

8. A hydraulic clamp according to claim 7 wherein: the ejector rod is detachably and fixedly connected with the clamping block.

9. A hydraulic clamp according to claim 8 wherein: a buffer spring is movably sleeved on the mandril between the bottom wall of the groove and the clamping block.

10. A hydraulic clamp according to claim 9 wherein: the detachable fixed connection is provided with radial through-hole for on the ejector pin, and the side of grip block has seted up the ladder screw hole, and the ladder threaded hole is equipped with hexagon socket head cap screw, sets up the jack that corresponds with the ejector pin on the lateral wall of grip block orientation electro-magnet, jack and ladder screw hole intercommunication, and the side of grip block is equipped with along the scale of thickness direction.