Double-cylinder ejection device

Abstract

The utility model belongs to the technical field of cylinder ejection mechanisms, and discloses a double-cylinder ejection device. The double-air-cylinder ejection device comprises a base, two air cylinder assemblies, a knockout rod and an ejection plate. The two air cylinder assemblies are located on the two opposite sides of the base in the first direction correspondingly. Each air cylinder assembly comprises an air cylinder body, a push rod, a fixing base and a guide sleeve, the two axial ends of the push rod are connected with the output end of the air cylinder body and the fixing base respectively, and the push rod and the fixing base are sleeved with the guide sleeve. A clamping groove is formed in the surface of the end, deviating from the air cylinder body, of the fixing base, and receding grooves are formed in the surfaces of the sides, facing each other, of the two guide sleeves. The two axial ends of the knockout rod are clamped in the clamping grooves and the avoiding grooves in the corresponding sides correspondingly. The pin penetrates through the side wall of the clamping groove and the knockout rod to connect the fixed seat and the knockout rod; one end of the top plate is connected with the knockout rod, and the other end can abut against workpieces. The double-cylinder ejection device is good in stability and high in structural strength.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cylinder ejection mechanism technical field especially relates to a double cylinder ejection device. BACKGROUND

[0002] The cylinder ejection mechanism is a device for pushing, lifting or pushing out workpieces, wherein the double cylinder ejection mechanism is usually synchronized or alternately worked by two cylinders to improve stability or greater thrust. Generally, the double cylinder ejection mechanism includes two synchronous cylinders, two push rods, two connecting seats, a material removing rod and a top plate, the two cylinders drive the respective push rods and connecting seats, and the material removing rod is pushed by the two push rods, and the top plate on the material removing rod directly contacts the workpiece to act on the workpiece. However, in the working process of the double cylinder ejection mechanism, especially when the top plate lifts the workpiece in the vertical direction, the push rod is prone to shaking due to the gravity of the workpiece and other loads, and the workpiece is unstable during ejection; and the material removing plate also shakes due to the gravity of the workpiece and other loads, which causes the connecting screw rod of the material removing rod and the fixed seat to be prone to breaking.

[0003] Therefore, it is urgent to provide a double cylinder ejection device to solve the above problems. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a double cylinder ejection device, which has good stability and high structural strength.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The double cylinder ejection device comprises:

[0007] a base;

[0008] two groups of cylinder assemblies, each group of the cylinder assemblies is located on the opposite sides of the base along a first direction, each group of the cylinder assemblies comprises a cylinder body, a push rod, a fixed seat and a guide sleeve, the axial ends of the push rod are connected with the output end of the cylinder body and the fixed seat respectively, the guide sleeve is sleeved on the push rod and the fixed seat, the cylinder body can drive the push rod to slide the fixed seat in the guide sleeve, the surface of the end of the fixed seat away from the cylinder body is provided with a clamping groove, and the side surfaces of the two guide sleeves facing each other are both provided with an avoiding groove;

[0009] a material removing rod, the axial ends of the material removing rod are clamped in the clamping grooves and the avoiding grooves on the corresponding sides respectively, and a pin is inserted through the side wall of the clamping groove and the material removing rod to connect the fixed seat and the material removing rod;

[0010] a top plate, one end of the top plate is connected with the material removing rod, and the other end can abut against a workpiece;

[0011] The first direction is an axial direction of the ramming rod.

[0012] As an optional technical scheme of the double-cylinder ejection device, a gap between the inner side wall of the guide sleeve and the outer side wall of the fixed seat is n1, and n1≤0.1 mm.

[0013] As an optional technical scheme of the double-cylinder ejection device, a gap between the inner side wall of the clamping groove and the side wall of the ramming rod is n2, and n2≤0.1 mm; and a gap between the inner bottom wall of the clamping groove and the ramming rod is n3, and n3≤0.1 mm.

[0014] As an optional technical scheme of the double-cylinder ejection device, a strip-shaped hole is arranged on the ramming rod, a size of the strip-shaped hole along the first direction is greater than a size of the strip-shaped hole along an axial direction of the push rod, and the pin is connected to the fixed seat and the ramming rod by penetrating the corresponding strip-shaped hole.

[0015] As an optional technical scheme of the double-cylinder ejection device, two outer side walls of the clamping groove opposite in a second direction are respectively provided with counterbores, two ends of the pin are respectively clamped in the counterbores, and the second direction is perpendicular to the first direction.

[0016] As an optional technical scheme of the double-cylinder ejection device, the ramming rod penetrates the top plate along the first direction.

[0017] As an optional technical scheme of the double-cylinder ejection device, the double-cylinder ejection device further comprises a connecting piece, and the connecting piece penetrates and connects the ramming rod and the top plate.

[0018] As an optional technical scheme of the double-cylinder ejection device, the connecting piece is a screw, a plurality of the screws are arranged at intervals along the first direction, and the screw penetrates and connects the ramming rod and the top plate.

[0019] As an optional technical scheme of the double-cylinder ejection device, one side of two guide sleeves facing each other along the first direction is respectively provided with a folded edge, and the folded edge is connected to the base.

[0020] As an optional technical scheme of the double-cylinder ejection device, one side of two guide sleeves away from each other along the first direction is arranged in an open manner.

[0021] The double-cylinder ejection device has the following beneficial effects:

[0022] This utility model provides a dual-cylinder ejection device comprising a base, cylinder assemblies, ejector rods, and a top plate. Two sets of cylinder assemblies are located on opposite sides of the base, working together to drive and lift the device, resulting in high efficiency. Each cylinder assembly includes a cylinder body, a push rod, a fixed seat, and a guide sleeve. The two ends of the push rod are connected to the output end of the cylinder body and the fixed seat, respectively. The guide sleeve is fitted onto the push rod and the fixed seat. The cylinder body drives the push rod to slide within the guide sleeve, which provides support and guidance, preventing the push rod from wobbling during sliding and improving the stability of the dual-cylinder ejection device during operation. A slot is provided on one end surface of the fixed seat, and both guide sleeves have clearance slots. The two ends of the ejector rod are respectively engaged in the corresponding slot and clearance slot. The clearance slots allow the ejector rod to pass through, ensuring it is engaged within the slots and increasing the connection strength between the fixed seat and the ejector rod. The pin passes through the side wall of the slot and the ejector rod to connect the fixed seat and the ejector rod. One end of the top plate is connected to the ejector rod, and the other end can abut the workpiece. Since pins are usually designed to withstand radial shear force, their strength is usually higher than that of the screw when subjected to lateral force. Therefore, this double-cylinder ejector device uses pins to connect the fixed seat and the ejector rod, which can solve the problem of easy breakage of the screw, increase the connection strength between the fixed seat and the ejector rod, and thus improve the structural strength of the double-cylinder ejector device. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the dual-cylinder ejection device provided in this embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the fixing base provided in an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the guide sleeve provided in an embodiment of the present utility model;

[0026] Figure 4 This is an assembly drawing of the feeding rod, pin, and top plate provided in an embodiment of this utility model;

[0027] Figure 5 yes Figure 1 A magnified view of a portion at point A.

[0028] In the picture:

[0029] 100, Base; 200, Cylinder assembly; 210, Cylinder body; 220, Push rod; 230, Fixing seat; 231, Slot; 232, Countersunk hole; 233, Connecting column; 240, Guide sleeve; 241, Clearance groove; 242, Folded edge; 300, Feed rod; 310, Strip hole; 400, Top plate; 500, Pin. Detailed Implementation

[0030] The utility model will be described in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are merely intended to explain the utility model and not to limit the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for ease of description, not all the structures.

[0031] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0033] In the description of the embodiment, the terms "upper", "lower", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0034] The embodiment provides a double-cylinder ejection device, which is good in stability and high in structural strength.

[0035] Specifically, as Figures 1 to 5As shown, the double-cylinder ejection device comprises a base 100, two sets of cylinder assemblies 200, a ramming rod 300 and a top plate 400. The base 100 can be square, circular or rectangular in shape, and the specific shape is not limited. The two sets of cylinder assemblies 200 are respectively located on the opposite sides of the base 100 along a first direction (x direction in the figure), and the installation positions of the two sets of cylinder assemblies 200 on the sides of the base 100 are the same. Each set of cylinder assemblies 200 comprises a cylinder body 210, a push rod 220, a fixed seat 230 and a guide sleeve 240, the axial (z direction in the figure) ends of the push rod 220 are respectively connected with the output end of the cylinder body 210 and the fixed seat 230, the guide sleeve 240 is sleeved on the push rod 220 and the fixed seat 230, and the cylinder body 210 can drive the push rod 220 to drive the fixed seat 230 to slide in the guide sleeve 240 along the axial direction of the push rod 220. The end surface of the fixed seat 230 away from the cylinder body 210 is provided with a clamping groove 231, and the side surface of each of the two guide sleeves 240 facing each other is provided with an avoiding groove 241; the axial (first direction) ends of the ramming rod 300 are respectively clamped in the clamping groove 231 and the avoiding groove 241 on the corresponding side. A pin 500 is inserted through the side wall of the clamping groove 231 and the ramming rod 300 to connect the fixed seat 230 and the ramming rod 300; the top plate 400 is located between the two fixed seats 230 and at the middle of the ramming rod 300 along the first direction, and one end of the top plate 400 (the end facing the base 100 along the axial direction of the push rod 220) is connected with the ramming rod 300, and the other end (the end away from the base 100 along the axial direction of the push rod 220) can abut against the workpiece.

[0036] The first direction is the axial direction of the ramming rod 300, i.e. the x direction in the figure.

[0037] Based on the above design, two groups of cylinder assemblies 200 are located on opposite sides of the base 100, and jointly play a driving jacking role, with high work efficiency. Each group of cylinder assemblies 200 includes a cylinder body 210, a push rod 220, a fixed seat 230, and a guide sleeve 240. The two ends of the push rod 220 are respectively connected with the output end of the cylinder body 210 and the fixed seat 230. The guide sleeve 240 is sleeved on the push rod 220 and the fixed seat 230. The cylinder body 210 can drive the push rod 220 to drive the fixed seat 230 to slide in the guide sleeve 240. The guide sleeve 240 plays a supporting and guiding role, avoiding shaking of the push rod 220 during sliding, and improving the stability of the double-cylinder ejection device during operation. One end surface of the fixed seat 230 is provided with a clamping groove 231. Two guide sleeves 240 are each provided with an avoiding groove 241. Two ends of the ramming rod 300 are respectively clamped in the clamping groove 231 and the avoiding groove 241 on the corresponding side. The avoiding groove 241 avoids the ramming rod 300 to be clamped in the clamping groove 231, thereby increasing the connection strength between the fixed seat 230 and the ramming rod 300. The pin 500 is inserted through the side wall of the clamping groove 231 and the ramming rod 300 to connect the fixed seat 230 and the ramming rod 300. One end of the top plate 400 is connected with the ramming rod 300, and the other end can abut against the workpiece. Since the pin 500 is usually designed to bear radial shear force, the strength is usually higher than that of the screw rod when subjected to transverse force. Therefore, the double-cylinder ejection device uses the pin 500 to connect the fixed seat 230 and the ramming rod 300, which can solve the problem of easy breakage of the screw rod, increase the connection strength between the fixed seat 230 and the ramming rod 300, and further improve the structural strength of the double-cylinder ejection device.

[0038] In the embodiment, a high-hardness pin 500 is used, for example, the hardness specification of the pin 500 used is HRC58; and a high-wear-resistant pin 500 is used, for example, the wear-resistant specification of the pin 500 used is SKD11.

[0039] Optionally, the side of the fixed seat 230 facing the push rod 220 is provided with a connecting column 233, and the push rod 220 is inserted into the connecting column 233, which facilitates the connection of the push rod 220 and improves the connection strength between the push rod 220 and the fixed seat 230.

[0040] Optionally, the cylinder body 210 further includes a cylinder cover, which is arranged on the opening of the cylinder body 210. The push rod 220 is connected with the output end of the cylinder body 210 through the cylinder cover.

[0041] It should be pointed out that, due to the arrangement of the guide sleeve 240, the length of the push rod 220 can be moderately increased, and the length of the push rod 220 can be extended to 100mm.

[0042] Optionally, the two guide sleeves 240 are respectively provided with a folded edge 242 on the side facing each other in the first direction. The folded edge 242 is connected with the base 100, which is simple in connection operation, low in cost, and high in connection strength.

[0043] Specifically, the folding edge 242 is perpendicular to the side wall of the guide sleeve 240 and is attached to one side of the base 100 facing the top plate 400, and the bolt is arranged to connect the folding edge 242 and the base 100.

[0044] Optionally, the two guide sleeves 240 are open on the sides facing away from each other in the first direction, saving the manufacturing material of the guide sleeve 240.

[0045] In this embodiment, the guide sleeve 240 is rectangular, formed by three strip-shaped plates connected end to end in sequence, and the fixing seat 230 is clamped between two strip-shaped plates, and the avoiding groove 241 is located on the third strip-shaped plate between the two opposite strip-shaped plates.

[0046] Optionally, the gap between the inner side wall of the guide sleeve 240 and the outer side wall of the fixing seat 230 is n1, and n1≤0.1mm, and exemplarily, n1 can be 0.02mm, 0.04mm, 0.06mm or 0.1mm. The gap between the inner side wall of the guide sleeve 240 and the outer side wall of the fixing seat 230 is to ensure that the guide sleeve 240 and the fixing seat 230 can be assembled, but the gap between the inner side wall of the guide sleeve 240 and the outer side wall of the fixing seat 230 is reduced to avoid the fixing seat 230 from shaking in the guide sleeve 240, thereby avoiding the push rod 220 from shaking in the guide sleeve 240 to improve the working stability of the double-cylinder ejection device.

[0047] In this embodiment, the gap between the inner side wall of the guide sleeve 240 and the outer side wall of the fixing seat 230 mainly refers to the gap between the inner side wall of the guide sleeve 240 and the outer side wall of the fixing seat 230 on both sides in the second direction (perpendicular to the first direction, y direction in the figure), to avoid the fixing seat 230 from shaking in the second direction, so that the workpiece swings in the second direction.

[0048] Optionally, the gap between the inner side wall of the clamping groove 231 and the side wall of the material striking rod 300 is n2, and n2≤0.1mm, and exemplarily, n2 can be 0.02mm, 0.04mm, 0.08mm or 0.1mm. In this embodiment, the gap between the inner side wall of the clamping groove 231 and the side wall of the material striking rod 300 mainly refers to the gap between the opposite inner side walls and the opposite side walls of the material striking rod 300 in the second direction (y direction), and reducing the gap is also to avoid the fixing seat 230 from shaking in the second direction.

[0049] Optionally, the gap between the inner bottom wall of the clamping groove 231 and the ramming rod 300 is n3, and n3≤0.1 mm. For example, n3 can be 0.02 mm, 0.06 mm, 0.08 mm or 0.1 mm. In this embodiment, the gap between the inner bottom wall of the clamping groove 231 and the ramming rod 300 mainly refers to the gap between the inner wall of the clamping groove 231 on one side of the axial direction (z direction in the figure) of the push rod 220 and the side wall of the ramming rod 300. Reducing the gap here increases the connection strength of the ramming rod 300 and the fixed seat 230 and makes the structure more compact.

[0050] In this embodiment, the clamping groove 231 is a square groove, and the ramming rod 300 is a rectangular rod. In order to facilitate the assembly of the ramming rod 300 in the clamping groove 231, the axial ends of the ramming rod 300 are both provided with a corner missing towards the base 100 side.

[0051] Optionally, the ramming rod 300 is provided with a strip-shaped hole 310, the size of the strip-shaped hole 310 along the first direction is greater than the size of the strip-shaped hole 310 along the axial direction of the push rod 220, and the pin 500 is connected and fixed to the fixed seat 230 and the ramming rod 300 by penetrating the corresponding strip-shaped hole 310. The strip-shaped hole 310 can reduce the risk of the pin 500 being broken after being blocked under unbalanced stress.

[0052] Optionally, the two outer side walls of the clamping groove 231 opposite in the second direction are respectively provided with a countersunk hole 232, and the two ends of the pin 500 are respectively clamped in the countersunk hole 232. The second direction is perpendicular to the first direction. The pin 500 can be embedded in the outer side wall of the fixed seat 230 to avoid interference with the guide sleeve 240.

[0053] Optionally, the ramming rod 300 penetrates the top plate 400 along the first direction, that is, the top plate 400 is sleeved on the ramming rod 300. Compared with the end of the top plate 400 embedded in one side surface of the ramming rod 300, the sleeved connection can increase the contact area of the ramming rod 300 and the top plate 400, thereby improving the connection strength of the two.

[0054] In this embodiment, the machining of the top plate 400 and the ramming rod 300 adopts a guide pillar and guide sleeve through type structure, and both adopt an integral wire cutting process for machining to match the penetration of the ramming rod 300 to the top plate 400.

[0055] It should be noted that the gap n3 between the ramming rod 300 and the penetration contact wall of the top plate 400 should be as small as possible, and 0.03 mm≤n3≤0.05 mm. For example, n3 can be 0.03 mm, 0.04 mm or 0.05 mm, etc.

[0056] Further, the double-cylinder ejection device further comprises a connecting piece for connecting the ramming rod 300 and the top plate 400 to fix the ramming rod 300 and the top plate 400.

[0057] Further, the connecting pieces are screws, and the plurality of screws are arranged at intervals along the first direction, and the screws are arranged to connect the ramming rod 300 and the top plate 400.

[0058] In the embodiment, the screws are of M10*60, 12.9 grade.

[0059] Obviously, the above embodiments of the utility model are only for clear illustration of the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, all the embodiments need not and cannot be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A dual cylinder ejection device characterized by, The utility model relates to a double-cylinder ejection device, which comprises a base (100), two sets of cylinder assemblies (200) respectively located on opposite sides of the base (100) along a first direction, each set of cylinder assemblies (200) comprising a cylinder body (210), a push rod (220), a fixed seat (230), and a guide sleeve (240), the axial ends of the push rod (220) being connected to the output end of the cylinder body (210) and the fixed seat (230) respectively, the guide sleeve (240) being sleeved on the push rod (220) and the fixed seat (230), the cylinder body (210) being capable of driving the push rod (220) to slide the fixed seat (230) in the guide sleeve (240), the end surface of the fixed seat (230) away from the cylinder body (210) being provided with a clamping groove (231), and the side surfaces of the two guide sleeves (240) facing each other being provided with avoiding grooves (241). A material ejecting rod (300) is clamped in the clamping grooves (231) and the avoiding grooves (241) on the corresponding sides, and a pin (500) is inserted through the side wall of the clamping groove (231) and the material ejecting rod (300) to connect the fixed seat (230) and the material ejecting rod (300). A top plate (400) is connected to one end of the material ejecting rod (300) and capable of abutting against a workpiece at the other end. The first direction is the axial direction of the material ejecting rod (300). The gap between the inner side wall of the guide sleeve (240) and the outer side wall of the fixed seat (230) is n1, and n1 is less than or equal to 0.1 mm. The gap between the inner side wall of the clamping groove (231) and the side wall of the material ejecting rod (300) is n2, and n2 is less than or equal to 0.1 mm; the gap between the inner bottom wall of the clamping groove (231) and the material ejecting rod (300) is n3, and n3 is less than or equal to 0.1 mm.

2. The dual cylinder ejection device of claim 1, wherein, A strip-shaped hole (310) is arranged on the material ejecting rod (300), the size of the strip-shaped hole (310) along the first direction is greater than the size of the strip-shaped hole (310) along the axial direction of the push rod (220), and the pin (500) is inserted through the corresponding strip-shaped hole (310) to connect the fixed seat (230) and the material ejecting rod (300).

3. The dual cylinder ejection device of claim 1, wherein, Counterposed outer side walls of the clamping groove (231) along a second direction are respectively provided with counterbores (232), the two ends of the pin (500) are clamped in the counterbores (232), and the second direction is perpendicular to the first direction.

4. The dual cylinder ejection device of claim 1, wherein, The material ejecting rod (300) is inserted through the top plate (400) along the first direction.

5. The dual cylinder ejection device of claim 1, wherein, The double-cylinder ejection device further comprises a connecting piece inserted through the material ejecting rod (300) and the top plate (400).

6. The dual cylinder ejection device of claim 1, wherein, The connecting piece is a screw, a plurality of screws are arranged at intervals along the first direction, and the screws are inserted through the material ejecting rod (300) and the top plate (400).

7. The dual cylinder ejection device of claim 6, wherein, ​ 8. The dual cylinder ejection device of claim 7, wherein, ​ 9. The dual cylinder ejection apparatus of any of claims 1-8, wherein, Two said guide sleeves (240) are respectively provided with a folded edge (242) on the side facing each other along the first direction, and the folded edge (242) is connected with the base (100).

10. The dual cylinder ejection apparatus according to any one of claims 1 to 8, characterized by Two said guide sleeves (240) are open on the side facing away from each other along the first direction.

Images