CN211840196U - Hydraulic expansion sleeve type clamp - Google Patents

Abstract

A hydraulic expansion sleeve type clamp comprises an interface base, wherein an oil cylinder piston, a clamping oil duct and a loosening oil duct are arranged in the interface base; the outer ends of the clamping oil duct and the loosening oil duct are communicated with the outside, the inner end of the clamping oil duct is communicated with the front space of the oil cylinder piston, the inner end of the loosening oil duct is communicated with the rear space of the oil cylinder piston, and the oil cylinder piston can slide back and forth in the interface base under the action of oil pressure by supplying oil to the clamping oil duct and the loosening oil duct; the front end of the oil cylinder piston is fixedly connected with the expansion sleeve blind rivet, a connecting cone body is sleeved on the periphery of the expansion sleeve blind rivet, an end face supporting seat is sleeved outside the connecting cone body, the expansion sleeve blind rivet penetrates through the middle of the connecting cone body, an annular clamping groove is formed in the end portion of the expansion sleeve blind rivet, a trapezoidal expansion sleeve is clamped in the annular clamping groove, the slope face of the expansion sleeve is attached to the slope face of the connecting cone body, and the expansion sleeve can slide on the slope face of the cone body under the action of the expansion sleeve blind rivet; the clamp has high precision; the air tightness detection function is provided, so that the air tightness detection device has a good error-proofing function.

Description

A hydraulic expansion sleeve clamp

technical field

The utility model relates to a clamp, in particular to a hydraulic expansion sleeve type clamp.

Background technique

Conventional hydraulic fixtures can only move through the machine tool peripheral hydraulic mechanism by pushing the fixture through the pull rod. The fixture accuracy of this method is easily affected by the external force of the peripheral hydraulic mechanism. On the other hand, ordinary hydraulic fixtures also have no air tightness detection. Disadvantages of functionality.

Utility model content

The purpose of the utility model is to solve the problems that the accuracy of the current conventional hydraulic clamp is easily affected by the external force of the peripheral hydraulic mechanism and does not have the function of airtightness detection.

The technical scheme adopted by the utility model is: a hydraulic expansion sleeve type clamp, comprising an interface base, wherein an oil cylinder piston, a clamping oil passage and a loosening oil passage are arranged in the interface base; the clamping oil passage and the The outer end of the loosening oil passage is connected to the outside, the inner end of the clamping oil passage leads to the front space of the cylinder piston, and the inner end of the loosening oil passage leads to the rear space of the cylinder piston. The oil cylinder piston can slide back and forth inside the interface base under the action of oil pressure; the front end of the oil cylinder piston is fixedly connected with the expansion sleeve pull nail, and the outer sleeve of the expansion sleeve pull nail is sleeved with a connecting vertebral body , the outer part of the connecting vertebral body is sleeved with an end face support seat, the expansion sleeve pull screw runs through the middle part of the connecting vertebral body, the end of the expansion sleeve pull nail is provided with an annular groove, and a trapezoidal expansion sleeve is clamped in the annular clamping groove. The sloping surface is fitted with the vertebral body sloping surface connecting the vertebral bodies, and the expanding sleeve can slide on the vertebral body sloping surface under the action of the expanding sleeve pulling screw.

Further, an airtight detection channel is also included, and the airtight detection channel penetrates through the interface base, the connecting vertebral body and the end surface support seat.

Further, a No. 1 positioning pin is arranged between the expanding sleeve and the connecting vertebral body.

Further, there are multiple expansion sleeves, which are circumferentially arranged on the outer surface of the expansion sleeve pull stud.

Further, the front end of the oil cylinder piston is provided with a piston clamping groove, and the rear end of the expandable pull stud is clamped into the piston clamping groove.

Further, a No. 2 locating pin is arranged between the piston of the oil cylinder and the connecting vertebral body.

Further, the expansion sleeve is made of a mixed material of metal and plastic.

The beneficial effects and characteristics of the utility model are as follows: (1) the accuracy of the fixture is not easily affected by the external force of the peripheral hydraulic mechanism; (2) it has the function of airtight detection, so it has a good function of preventing errors.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the preferred embodiment of the present utility model;

Fig. 2 is the three-dimensional structure diagram in Fig. 1;

The symbols in the figure represent: 1- interface base, 2- oil cylinder piston, 3- clamping oil channel, 4- loosening oil channel, 5- expanding sleeve pulling screw, 6- connecting vertebral body, 61- vertebral body slope surface , 7-ring groove, 8-expansion sleeve, 81-expansion sleeve slope surface, 9-end face support seat, 10-airtight detection channel, 11-No.1 locating pin, 12-No.2 locating pin, 13-plug .

Detailed ways

The utility model is further described below in conjunction with the accompanying drawings:

Example 1:

Please refer to FIG. 1 and FIG. 2 , a hydraulic expansion-sleeve clamp includes an interface base 1, and the interface base 1 is provided with an oil cylinder piston 2 (this clamp has its own oil cylinder piston, so it avoids the problem of external force affecting the accuracy of the clamp , to ensure the stability, accuracy, and consistency of the processed parts), clamping oil passage 3 and loosening oil passage 4; the outer ends of the clamping oil passage 3 and the loosening oil passage 4 are connected to the outside, The inner end of the clamping oil passage 3 leads to the front space of the oil cylinder piston 2, and the inner end of the loosening oil passage 4 leads to the rear space of the oil cylinder piston 2. Oil, the oil cylinder piston 2 can slide back and forth inside the interface base 1 under the action of oil pressure; specifically, the clamping oil passage 3 and the loosening oil passage 4 can be connected to the hydraulic oil pipe in the main shaft of the machine tool, and the in and out oil passage of the hydraulic oil pipe To push to achieve power, the clamp body is equipped with a hydraulic cylinder to tighten or expand the parts.

The front end of the cylinder piston 2 is fixedly connected with the expansion sleeve pull stud 5. Specifically, the front end of the cylinder piston 2 is provided with a piston clamping groove 21, and the rear end of the expansion sleeve pull nail 5 is clamped into the piston clamping groove 21. . A connecting vertebral body 6 is sleeved on the periphery of the expanding sleeve pulling nail 5, an end face support seat 9 is sleeved outside the connecting vertebral body 6, the expanding sleeve pulling nail 5 is connected through the middle of the connecting vertebral body 6, and the end of the expanding sleeve pulling nail 5 is provided with a ring shape. The clamping groove 7, the annular clamping groove 7 is clamped with a trapezoidal expansion sleeve 8, the expansion sleeve slope surface 81 of the expansion sleeve 8 and the vertebral body slope surface 61 connecting the vertebral body 6 fit together, and the expansion sleeve 8 is in the expansion sleeve pull nail 5. Under the action, it can slide on the slope surface 61 of the vertebral body. When the expansion sleeve 8 slides backward, the expansion sleeve 8 rises in the diameter direction ("downhill" state), which can support the parts to be processed. When the expansion sleeve 8 moves forward When sliding, the expansion sleeve 8 contracts in the diametrical direction ("downhill" state), and the machined parts are removed from the expansion sleeve 8.

Example 2:

In order to prevent the expansion sleeve 8 from sliding in the circumferential direction, a No. 1 positioning pin 11 is provided between the expansion sleeve 8 and the connecting vertebral body 6; ; The expanding sleeve 8 is made of a mixed material of metal and plastic to ensure that the expanding sleeve 8 not only has a certain rigidity, but also has a certain elasticity.

In order to prevent the cylinder piston 2 from rotating in the circumferential direction, a No. 2 positioning pin 12 is provided between the cylinder piston 2 and the connecting cone 6 .

The fixture also includes an airtight detection channel 10 , and the airtight detection channel 10 penetrates through the interface base 1 , the connecting vertebral body 6 and the end surface support seat 9 . If the machine tool itself has its own air tightness detection, the pneumatic port can be opened on the fixture, and the air blowing function can be realized on the right side of the end face support seat 9. If the air pressure of the product is flat against the support seat, it means that the installation is in place. If the air pressure of the installed product drops, the machine tool automatically alarms and requires manual intervention, so it has a good error-proofing function.

This fixture can be customized according to different equipment. If it is a common equipment, the holes in the base can be drilled through, and the power output can be completed by connecting the external pull rod to the right expansion stud.

The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. Those skilled in the art should understand that the present utility model is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and the description are only to illustrate the structural relationship and principle of the present utility model, without departing from the spirit and scope of the present utility model. , the utility model will also have various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. A hydraulic expansion sleeve type clamp, comprising an interface base (1), characterized in that: the interface base (1) is provided with an oil cylinder piston (2), a clamping oil passage (3) and a loosening oil channel (4); the outer ends of the clamping oil channel (3) and the loosening oil channel (4) are connected to the outside, and the inner end of the clamping oil channel (3) leads to the front of the cylinder piston (2). The inner end of the loosening oil passage (4) leads to the rear space of the cylinder piston (2). By supplying oil to the clamping oil passage (3) and the loosening oil passage (4), the cylinder piston (2) It can slide back and forth inside the interface base (1) under the action of oil pressure; the front end of the cylinder piston (2) is fixedly connected with the expansion sleeve pull screw (5), and the outer sleeve of the expansion sleeve pull nail (5) is sleeved with a connecting cone The body (6) is connected to the outer part of the vertebral body (6) with an end surface support seat (9); An annular clamping groove (7), a trapezoidal expansion sleeve (8) is clamped in the annular clamping groove (7), an expansion sleeve slope surface (81) of the expansion sleeve (8) and a vertebral body slope surface (61) connecting the vertebral body (6) ), the expansion sleeve (8) can slide on the vertebral body slope surface (61) under the action of the expansion sleeve pull screw (5). 2. The hydraulic expansion sleeve type clamp according to claim 1, characterized in that: it further comprises an airtight detection channel (10), and the airtight detection channel (10) penetrates through the interface base (1) and connects the vertebral body (10). 6) and the end face support seat (9). 3 . The hydraulic expansion sleeve type clamp according to claim 1 , wherein a No. 1 positioning pin ( 11 ) is arranged between the expansion sleeve ( 8 ) and the connecting vertebral body ( 6 ). 4 . 4. The hydraulic expansion sleeve clamp according to claim 1, characterized in that: there are a plurality of expansion sleeves (8), which are circumferentially arranged on the outer surface of the expansion sleeve pull stud (5). 5. The hydraulic expansion sleeve clamp according to claim 1, characterized in that: the front end of the cylinder piston (2) is provided with a piston clamping groove (21), and the rear end of the expansion sleeve pull stud (5) is clamped into the piston groove (21). 6 . The hydraulic expansion sleeve type clamp according to claim 1 , wherein a No. 2 positioning pin ( 12 ) is arranged between the cylinder piston ( 2 ) and the connecting vertebral body ( 6 ). 7 . 7 . The hydraulic expansion sleeve type clamp according to claim 1 , wherein the expansion sleeve ( 8 ) is made of a mixed material of metal and plastic. 8 .

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