CN108357181B - Laminating device - Google Patents

Laminating device Download PDF

Info

Publication number
CN108357181B
CN108357181B CN201810090140.0A CN201810090140A CN108357181B CN 108357181 B CN108357181 B CN 108357181B CN 201810090140 A CN201810090140 A CN 201810090140A CN 108357181 B CN108357181 B CN 108357181B
Authority
CN
China
Prior art keywords
side wall
cylinder
guide hole
oil cylinder
cylinder shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810090140.0A
Other languages
Chinese (zh)
Other versions
CN108357181A (en
Inventor
王刘阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Interface Optoelectronics Shenzhen Co Ltd
Interface Technology Chengdu Co Ltd
General Interface Solution Ltd
Original Assignee
Interface Optoelectronics Shenzhen Co Ltd
Interface Technology Chengdu Co Ltd
General Interface Solution Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Interface Optoelectronics Shenzhen Co Ltd, Interface Technology Chengdu Co Ltd, General Interface Solution Ltd filed Critical Interface Optoelectronics Shenzhen Co Ltd
Priority to CN201810090140.0A priority Critical patent/CN108357181B/en
Publication of CN108357181A publication Critical patent/CN108357181A/en
Application granted granted Critical
Publication of CN108357181B publication Critical patent/CN108357181B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Actuator (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

The invention relates to a laminating device which comprises a driving mechanism, an oil cylinder, a cylinder shaft and an extrusion plate, wherein the oil cylinder comprises a first side wall and a second side wall which are oppositely arranged, hydraulic oil is stored in the oil cylinder, a guide hole penetrating through the first side wall is further formed in the oil cylinder, and the axis of the guide hole extends along the direction from the first side wall to the second side wall. The cylinder shaft is in transmission connection with the driving mechanism and penetrates through the guide hole. The extrusion board is arranged on one side of the second side wall far away from the first side wall. Under actuating mechanism's drive effect, the cylinder shaft can be close to the second lateral wall along the axial of guide hole for the hydro-cylinder to extrude hydraulic oil, according to the even characteristic of fluid biography power, hydraulic oil can evenly exert pressure to the inner wall of hydro-cylinder, the hydro-cylinder transmits pressure for the stripper plate evenly again, thereby when the hydro-cylinder drives two intermediate product of stripper plate pressfitting, not only can reduce the impact force to the intermediate product greatly, can also make intermediate product atress balanced, thereby can prevent that the intermediate product from warping or even damaging, improve the yields of electronic product.

Description

Laminating device
Technical Field
The invention relates to the technical field of product fitting, in particular to a fitting device.
Background
When electronic products such as mobile phones and flat panels are produced, a laminating device is often used to laminate one intermediate product with another intermediate product to form a hierarchical structure. Traditional laminating device uses the cylinder as the power supply usually, directly drives the laminating platform and goes up and down to realize the laminating of two intermediate products. However, in this way, when the pressing platform drives one intermediate product to contact another intermediate product, the impact force on another intermediate product is large, and the other intermediate product is easily deformed or even damaged, thereby reducing the yield of the electronic product.
Disclosure of Invention
Therefore, it is necessary to provide a bonding apparatus capable of improving the yield of electronic products in order to solve the problem that the yield of electronic products is reduced by the conventional bonding apparatus.
A laminating device, comprising:
a drive mechanism;
the hydraulic oil cylinder comprises a first side wall and a second side wall which are oppositely arranged, a cavity for storing hydraulic oil is arranged in the hydraulic oil cylinder, a guide hole is further formed in the hydraulic oil cylinder, the guide hole is communicated with the cavity and penetrates through the first side wall, and the axis of the guide hole extends along the direction from the first side wall to the second side wall;
the cylinder shaft is in transmission connection with the driving mechanism and penetrates through the guide hole, under the driving action of the driving mechanism, the cylinder shaft can be close to or far away from the second side wall relative to the oil cylinder along the axial direction of the guide hole, and the cylinder shaft and the oil cylinder can move together along the axial direction of the guide hole; and
the extrusion plate is arranged on one side, far away from the cavity, of the second side wall.
In one embodiment, the driving mechanism further comprises a transmission assembly, and the driving mechanism is connected with the cylinder shaft through the transmission assembly.
In one embodiment, a groove is formed in one end, away from the second side wall, of the cylinder shaft, the transmission assembly includes a lead screw and a nut, one end of the lead screw is connected with the driving mechanism, the other end of the lead screw penetrates through the groove, and the nut is sleeved on the lead screw and connected with one end, away from the second side wall, of the cylinder shaft.
In one embodiment, the transmission assembly further comprises a coupling for connecting the driving mechanism and the lead screw.
In one embodiment, the projection of the guide hole on the second side wall falls within the projection of the nut on the second side wall.
In one embodiment, the cylinder further includes a buffer member, the cylinder further includes a guide tube, the guide tube is connected to the first side wall, the guide tube is provided with the guide hole, the guide tube includes a first end and a second end which are oppositely arranged, the guide hole penetrates through the first end and the second end, the first end is accommodated in the cavity, the first side wall is located between the first end and the second end, and the buffer member is located at the second end.
In one embodiment, the hydraulic oil cylinder device further comprises a pressure tester, wherein the pressure tester is connected with the oil cylinder and can detect the pressure value of the hydraulic oil.
In one embodiment, the pressure tester further comprises a controller, the controller is connected with the pressure tester and the driving mechanism, and the controller can control the stroke of the driving mechanism according to the detection result fed back by the pressure tester.
In one embodiment, the area of the side of the pressing plate away from the second side wall is smaller than the area of the side of the second side wall away from the cavity.
In one embodiment, the automatic telescopic mechanism is further included, a guide sleeve is further arranged on the oil cylinder, the guide sleeve is connected with the automatic telescopic mechanism, and after the oil cylinder moves along the direction from the first side wall to the second side wall along with the cylinder shaft, the automatic telescopic mechanism can enable the oil cylinder to reset.
Foretell laminating device, under actuating mechanism's drive effect, the cylinder shaft can be close to the second lateral wall for the hydro-cylinder along the axial of guide hole to the hydraulic oil in the extrusion hydro-cylinder, according to the even characteristic of fluid biography power, hydraulic oil can evenly exert pressure to the inner wall of hydro-cylinder, the hydro-cylinder transmits pressure for the stripper plate evenly again, thereby when the hydro-cylinder drives two intermediate product of stripper plate pressfitting, not only can reduce the impact force to the intermediate product greatly, can also make intermediate product atress balanced, thereby can prevent that the intermediate product from warping or even damaging, improve the yields of electronic product.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings of the embodiments can be obtained according to the drawings without creative efforts.
FIG. 1 is a cross-sectional view of a bonding apparatus according to an embodiment;
fig. 2 is a block diagram of a partial structure of the bonding apparatus shown in fig. 1.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a bonding apparatus 10 according to an embodiment is mainly used for bonding two intermediate products of an electronic product, for example, a mobile phone, and the bonding apparatus 10 can bond a protective cover and a touch module. The attaching device 10 includes a driving mechanism 100, a transmission assembly 200, a hydraulic assembly 300, and a squeeze plate 400, the driving mechanism 100 is used as a power source, the installation position is fixed, the transmission assembly 200 is connected to the hydraulic assembly 300, and the hydraulic assembly 300 can uniformly transmit the thrust generated by the transmission assembly 200 to the squeeze plate 400. The pressing plate 400 attracts one of the intermediate products by magnetic attraction or vacuum attraction, and moves toward the other intermediate product positioned on the worktable under the driving action of the driving mechanism 100, so that the two intermediate products are attached to each other.
Specifically, the drive mechanism 100 is a motor having an output shaft 110.
The transmission assembly 200 includes a lead screw 210 and a nut 220, one end of the lead screw 210 is connected to the driving mechanism 100, and the nut 220 is disposed on the lead screw 210 and connected to the hydraulic assembly 300. When the output shaft 110 of the driving mechanism 100 rotates, the lead screw 210 is driven to rotate together, so that the nut 220 moves along the lead screw 210, and thus the hydraulic assembly 300 and the compression plate 400 can move linearly. That is, transmission assembly 200 is capable of converting rotational motion of drive mechanism 100 into linear motion of hydraulic assembly 300.
In the present embodiment, the transmission assembly 200 further includes a coupling 230, and the coupling 230 is used for connecting the driving mechanism 100 and the lead screw 210, and specifically, the coupling 230 is used for connecting the output shaft 110 and the lead screw 210. The coupling 230 can not only transmit the rotation motion of the output shaft 110 to the lead screw 210 to realize the synchronous rotation of the output shaft 110 and the lead screw 210, but also protect the lead screw 210 and prevent the lead screw 210 from bearing an excessive load. It will be appreciated that in other embodiments, the lead screw 210 may be rigidly connected directly to the output shaft 110, and the coupling 230 may be omitted.
The hydraulic assembly 300 includes a cylinder 310 and a cylinder shaft 320, the cylinder 310 includes a first side wall 312 and a second side wall 314 disposed opposite to each other, and a direction from the first side wall 312 to the second side wall 314 is parallel to an axial direction of the lead screw 210. A cavity for storing hydraulic oil 330 is arranged in the oil cylinder 310, a guide hole 302 is further formed in the oil cylinder 310, the guide hole 302 is communicated with the cavity and penetrates through the first side wall 312, and an axis of the guide hole 302 extends along a direction from the first side wall 312 to the second side wall 314. The side of the second sidewall 314 remote from the cavity is connected to the stripper plate 400.
The end of the cylinder shaft 320 remote from the second side wall 314 is connected to the nut 220 and extends through the guide hole 302. The end of the cylinder shaft 320 away from the second side wall 314 is formed with a groove 322, and the end of the screw 210 away from the driving mechanism 100 is formed through the groove 322. Under the driving action of the driving mechanism 100, the nut 220 moves along the lead screw 210, when the nut 220 moves towards the second side wall 314, the length of the lead screw 210 accommodated in the groove 322 becomes smaller, and when the nut 220 moves away from the second side wall 314, the length of the lead screw 210 accommodated in the groove 322 becomes larger.
The cylinder shaft 320 is coupled to the nut 220 such that the cylinder shaft 320 can move toward or away from the second sidewall 314 along the axial direction of the guide hole 302 with respect to the cylinder 310 along with the nut 220. Furthermore, in the present embodiment, the projection of the guide hole 302 on the second sidewall 314 falls within the projection of the nut 220 on the second sidewall 314. Therefore, when the cylinder shaft 320 moves a certain distance toward the second side wall 314 along with the nut 220, the nut 220 abuts against the oil cylinder 310, and at this time, the oil cylinder 310 and the cylinder shaft 320 move together along with the nut 220 toward a workbench carrying another intermediate product.
The oil cylinder 310 is filled with hydraulic oil 330, when the cylinder shaft 320 is close to the second side wall 314 along the axial direction of the guide hole 302 relative to the oil cylinder 310 along with the nut 220, the cylinder shaft 320 can extrude the hydraulic oil 330, according to the characteristic that the force transmission of the oil is uniform, the hydraulic oil 330 can uniformly apply pressure to the inner wall of the oil cylinder 310, the oil cylinder 310 transmits the pressure to the extrusion plate 400 uniformly, and the extrusion plate 400 is uniform in stress and not easy to distort. Moreover, when the oil cylinder 310 drives the extrusion plate 400 to press two intermediate products, not only the impact force on the intermediate products can be greatly reduced, but also the stress on the intermediate products can be balanced, thereby preventing the intermediate products from being deformed or even damaged, and improving the yield of electronic products.
When the two intermediate products are attached, the output shaft 110 of the driving mechanism 100 rotates in the opposite direction, the nut 220 moves away from the second side wall 314 along the lead screw 210, and the cylinder shaft 320 moves away from the second side wall 314 along with the nut 220. When the nut 220 is separated from the cylinder 310, the cylinder 310 is automatically reset.
Specifically, laminating device 10 still includes automatic telescopic machanism 500, still is equipped with guide pin bushing 340 on the hydro-cylinder 310, and guide pin bushing 340 is connected with automatic telescopic machanism 500, and when nut 220 drove hydro-cylinder 310 and moved towards the workstation that bears another intermediate product, automatic telescopic machanism 500 can be compressed, and after nut 220 and hydro-cylinder 310 separated, automatic telescopic machanism 500 can rebound hydro-cylinder 310 automatically to make hydro-cylinder 310 reset. The automatic retracting mechanism 500 may be a nitrogen spring or a general tension spring.
It should be noted that, in addition to the transmission assembly 200 of the present embodiment, other transmission forms may also be adopted, such as a slide guide, and the driving mechanism 100 may be an air cylinder or a push rod motor, and directly drives the slide to slide along the guide, so as to drive the cylinder shaft 320 connected with the slide to move. Of course, in other embodiments, transmission assembly 200 may be omitted such that drive mechanism 100 directly drives cylinder shaft 320 to move linearly.
As shown in fig. 1, in the present embodiment, the cylinder 310 further includes a guide pipe 350, the guide pipe 350 is connected to the first sidewall 312, and the guide hole 302 is opened on the guide pipe 350. The guide tube 350 includes a first end and a second end opposite to each other, the guide hole 302 penetrates the first end and the second end, the first end is accommodated in the cavity, and the first sidewall 312 is located between the first end and the second end. The design of the conduit 350 not only can increase the contact area between the cylinder shaft 320 and the cylinder 310 to improve the stability of the movement of the cylinder shaft 320 when the cylinder shaft 320 moves relative to the cylinder 310 toward the second side wall 314, but also can prevent the hydraulic oil 330 from overflowing the cylinder 310. In other embodiments, the guide tube 350 can be omitted and the guide hole 302 can be directly formed on the first sidewall 312.
In addition, the nut 220 abuts against the cylinder 310, that is, the nut 220 abuts against the guide pipe 350, and besides the manner can drive the cylinder 310 and the cylinder shaft 320 to move together, a baffle plate can be disposed on the inner wall of the guide hole 302 or on the first end of the guide pipe 350, when the cylinder shaft 320 moves a certain distance along the axial direction of the guide hole 302 towards the second side wall 314, the cylinder shaft 320 abuts against the baffle plate, and thus the cylinder shaft 320 also drives the cylinder 310 to move together.
Further, the hydraulic assembly 300 further includes a buffer member 360, the buffer member 360 is disposed at the second end, and the buffer member 360 is made of a flexible material and can absorb a portion of the impact force of the nut 220 on the guide tube 350 to protect the guide tube 350.
In the present embodiment, the area of the side of the pressing plate 400 away from the second sidewall 314 is smaller than the area of the side of the second sidewall 314 away from the cavity. Thus, the oil cylinder 310 with a large area transmits pressure to the compression plate 400 with a small area, so that the compression plate 400 can be uniformly stressed, and the compression plate 400 is prevented from being distorted due to large stress in the middle and small stress at two ends of the compression plate 400.
In this embodiment, the bonding apparatus 10 further includes a pressure tester 600, and the pressure tester 600 is connected to the oil cylinder 310 and can detect the pressure value of the hydraulic oil 330.
Further, as shown in fig. 1 and 2, the attaching device 10 further includes a controller 700, the controller 700 is connected to the pressure tester 600 and the driving mechanism 100, and the controller 700 can control the stroke of the driving mechanism 100 according to the detection result fed back by the pressure tester 600, for example, if the pressure value of the hydraulic oil 330 detected by the pressure tester 600 is too large, the controller 700 will control the driving mechanism 100 to reduce the rotation speed, so that the thrust of the cylinder shaft 320 on the hydraulic oil 330 is more stable, and the gradient performance is better. The Controller 700 may be a PLC (Programmable Logic Controller), an MCU (Micro Control Unit), or other Controller capable of performing coordination and command operations.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A laminating device, comprising:
a drive mechanism;
the hydraulic oil cylinder comprises a first side wall and a second side wall which are oppositely arranged, a cavity for storing hydraulic oil is arranged in the hydraulic oil cylinder, a guide hole is further formed in the hydraulic oil cylinder, the guide hole is communicated with the cavity and penetrates through the first side wall, and the axis of the guide hole extends along the direction from the first side wall to the second side wall;
the cylinder shaft is in transmission connection with the driving mechanism and penetrates through the guide hole, under the driving action of the driving mechanism, the cylinder shaft can be close to or far away from the second side wall relative to the oil cylinder along the axial direction of the guide hole, the cylinder shaft can also move along the axial direction of the guide hole together with the oil cylinder, and the cylinder shaft and the second side wall are spaced in the process of moving along the axial direction of the guide hole together with the oil cylinder; and
the extrusion plate is arranged on one side, far away from the cavity, of the second side wall.
2. The laminating device of claim 1, further comprising a transmission assembly through which the drive mechanism is coupled to the cylinder shaft.
3. The attaching device according to claim 2, wherein a groove is formed in an end of the cylinder shaft away from the second side wall, the transmission assembly includes a lead screw and a nut, one end of the lead screw is connected to the driving mechanism, the other end of the lead screw penetrates through the groove, and the nut is disposed on the lead screw and connected to an end of the cylinder shaft away from the second side wall.
4. The laminating device of claim 3, wherein the transmission assembly further comprises a coupling for connecting the drive mechanism to the lead screw.
5. The laminating device of claim 3 wherein a projection of the guide hole on the second sidewall falls within a projection of the nut on the second sidewall.
6. The bonding apparatus according to claim 1, further comprising a buffer member, wherein the cylinder further comprises a guide tube, the guide tube is connected to the first sidewall, the guide tube has the guide hole, the guide tube comprises a first end and a second end opposite to each other, the guide hole penetrates the first end and the second end, the first end is accommodated in the cavity, the first sidewall is located between the first end and the second end, and the buffer member is disposed at the second end.
7. The laminating device of claim 1, further comprising a pressure tester, wherein the pressure tester is connected to the cylinder and is capable of detecting a pressure value of the hydraulic oil.
8. The laminating device of claim 7, further comprising a controller, wherein the controller is connected to the pressure tester and the driving mechanism, and the controller can control the stroke of the driving mechanism according to a detection result fed back by the pressure tester.
9. The laminating device of claim 1, wherein an area of a side of the compression plate remote from the second sidewall is less than an area of a side of the second sidewall remote from the cavity.
10. The laminating device according to claim 1, further comprising an automatic telescoping mechanism, wherein the oil cylinder is further provided with a guide sleeve, the guide sleeve is connected with the automatic telescoping mechanism, and the oil cylinder can be reset by the automatic telescoping mechanism after moving along the direction from the first side wall to the second side wall along the cylinder shaft.
CN201810090140.0A 2018-01-30 2018-01-30 Laminating device Active CN108357181B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810090140.0A CN108357181B (en) 2018-01-30 2018-01-30 Laminating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810090140.0A CN108357181B (en) 2018-01-30 2018-01-30 Laminating device

Publications (2)

Publication Number Publication Date
CN108357181A CN108357181A (en) 2018-08-03
CN108357181B true CN108357181B (en) 2020-04-14

Family

ID=63007273

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810090140.0A Active CN108357181B (en) 2018-01-30 2018-01-30 Laminating device

Country Status (1)

Country Link
CN (1) CN108357181B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2504420Y (en) * 2001-11-09 2002-08-07 中国科学院武汉岩土力学研究所 High pressure flexible oil pressure loading appts.
CN102764808A (en) * 2012-07-24 2012-11-07 哈尔滨工业大学 Hydraulic forming device and method of reducing cylindrical part
CN103302944A (en) * 2013-06-08 2013-09-18 上海朗华科贸有限公司 Laminating system and laminating method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2504420Y (en) * 2001-11-09 2002-08-07 中国科学院武汉岩土力学研究所 High pressure flexible oil pressure loading appts.
CN102764808A (en) * 2012-07-24 2012-11-07 哈尔滨工业大学 Hydraulic forming device and method of reducing cylindrical part
CN103302944A (en) * 2013-06-08 2013-09-18 上海朗华科贸有限公司 Laminating system and laminating method thereof

Also Published As

Publication number Publication date
CN108357181A (en) 2018-08-03

Similar Documents

Publication Publication Date Title
CN1951630B (en) Abutment module
WO2006104697A3 (en) Panel bending machine
CN102913509A (en) Electrohydraulic pressurizing cylinder and pressing machine equipment with same
TR201415218T1 (en) Servo-staple main transfer device for rotary controlled punch presses with numerical control.
CN207059273U (en) A kind of novel environment friendly case scissor compression set
CN210412377U (en) Double-servo rivet pulling device with torsion monitoring function
CN108357181B (en) Laminating device
CN101973695B (en) Automatic air inflation mechanism in laminated segmented plate of hollow glass production line
CN206598073U (en) A kind of easy-to-dismount pressure riveting mechanism
CN103867524B (en) A kind of double-action two-stage hydraulic cylinder
CN210164717U (en) Oil cylinder capable of preventing piston rod from being damaged
CN102818697B (en) Device for evaluating performances of window opening machine
CN202216756U (en) Temperature compensation type limit device
CN207806281U (en) A kind of rolling window frame roller-head component
CN102641931A (en) Pipe-fitting groove rolling device
CN202628680U (en) Compensation valve structure
CN107514438A (en) A kind of two-way hydraulic buffer
CN201538060U (en) Power source of connecting rod type ballscrew pairs
CN209041439U (en) A kind of novel damping pull rod
CN203009445U (en) Electro-hydraulic pressure cylinder
CN112517981A (en) Hydraulic punching device
CN211901364U (en) Overload protection coupling
CN201241887Y (en) Low-abrasion air cylinder with novel straight-line bearing
CN206048831U (en) A kind of pressure bar of pressure controllable
CN110829712A (en) Novel guide rail device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant