Columnar self-locking oil cylinder

Abstract

The utility model provides a columnar self-locking oil cylinder which comprises a cylinder barrel, a cylinder head, a cylinder cover, a flange plate, a guide sleeve mounting hole, a guide sleeve, a piston rod, a hydraulic self-locking piston, a piston buffer device, a self-locking device check ring, an annular groove, a mechanical self-locking device, a first chamfer angle and a second chamfer angle. The rear end of the mechanical self-locking device makes contact with the inclined face of the second chamfer angle, a cylinder head hole is formed in the middle of the cylinder head and penetrates through the cylinder head front and back, a blind hole is formed in the front end face of the cylinder cover, and an oil inlet hole communicated with the blind hole is formed in the outer wall of the cylinder cover. And an oil outlet hole communicated with the cylinder head hole is formed in the outer wall of the cylinder head. The self-locking device check ring and the hydraulic self-locking piston are matched with the mechanical self-locking device, so that hydraulic oil can only flow in one direction and cannot flow back, and normal working and using effects of the columnar oil cylinder are guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of die-casting die accessories, in particular to a column-type self-locking oil cylinder. Background Art

[0002] The oil cylinder is also a hydraulic cylinder. Oil cylinders are often used on die-casting molds to control the opening and closing of die-casting molds. During the operation of the die-casting machine, hydraulic oil is pressed into the oil cylinder to move the piston of the oil cylinder, thereby driving the opening and closing of the die-casting mold. By controlling the flow of hydraulic oil in the oil cylinder, the opening and closing speed and position of the die-casting mold can be accurately controlled. In the die-casting process, the role of the die-casting mold oil cylinder is very important. It can not only ensure the opening and closing action of the die-casting mold, but also realize automatic exhaust, automatic adjustment of mold temperature and control of casting quality during the die-casting process. Therefore, in the operation of the die-casting machine, the die-casting mold oil cylinder is an indispensable component.

[0003] Column type oil cylinder is also a commonly used oil cylinder now. Some existing column type oil cylinders have the defect of reflux oil, which will affect the use effect of the column type oil cylinder.

[0004] Therefore, improvements must be made to address the above-mentioned defects. Utility Model Content

[0005] The purpose of the utility model is to solve at least part of the above existing problems and bring corresponding beneficial effects.

[0006] In order to solve the above technical problems, the utility model provides a column-type self-locking oil cylinder, comprising a cylinder barrel, a cylinder head matched with the cylinder barrel is provided at the front end of the cylinder barrel, a cylinder cover matched with the cylinder barrel is provided at the rear end of the cylinder barrel, a flange plate is connected to the front end of the cylinder head, a guide sleeve mounting hole is provided in the middle of the flange plate, a guide sleeve is provided on the guide sleeve mounting hole, a piston rod is provided in the guide sleeve, the rear end of the piston rod is provided in the cylinder barrel, a hydraulic self-locking piston is provided at the rear end of the piston rod, a piston buffer device is provided on the piston rod on the rear side of the hydraulic self-locking piston, a self-locking device retaining ring is provided on the piston rod on the front side of the hydraulic self-locking piston, and a There is an annular groove, in which a mechanical self-locking device is arranged, a first chamfered right angle is arranged at the connection between the rear end face of the self-locking device retaining ring and the outer surface of the self-locking device retaining ring, the front end of the mechanical self-locking device contacts the inclined surface of the first chamfered right angle, a second chamfered right angle is arranged at the connection between the front end face of the hydraulic self-locking piston and the outer surface of the hydraulic self-locking piston, the rear end of the mechanical self-locking device contacts the inclined surface of the second chamfered right angle, a cylinder head hole is arranged in the middle of the cylinder head, the cylinder head hole passes through the cylinder head front and back, a blind hole is arranged on the front end face of the cylinder cover, an oil inlet hole connected with the blind hole is arranged on the outer wall of the cylinder cover, and an oil outlet hole connected with the cylinder head hole is arranged on the outer wall of the cylinder head.

[0007] Furthermore, the piston buffer device is an anti-collision piston.

[0008] Furthermore, a fastening sleeve for fastening to the piston rod is provided at the front end of the self-locking device retaining ring, and the fastening sleeve is arranged in the cylinder head hole. The outer diameter of the self-locking device retaining ring is smaller than the diameter of the annular groove, and the outer diameter of the fastening sleeve is smaller than the diameter of the cylinder head hole.

[0009] Furthermore, the rear end of the cylinder head is provided with a first inner convex ring matched with the front end of the annular groove, and the front end of the cylinder cover is provided with a second inner convex ring matched with the inner wall of the cylinder barrel.

[0010] Furthermore, the mechanical self-locking device is a circular ring, and the circular ring includes two elastic semicircular rings.

[0011] Furthermore, a third chamfered right angle corresponding to the first chamfered right angle is provided at the front end of the semicircular ring, and a fourth chamfered right angle corresponding to the second chamfered right angle is provided at the rear end of the semicircular ring.

[0012] Furthermore, the flange plate is provided with four bolt holes, each of the bolt holes is provided with a bolt, each of the bolts is provided on the outside of the cylinder barrel, and through holes corresponding to the four bolt holes are provided at the four corners of the cylinder head, the rear end of the bolt passes through the through hole, and a locking nut is provided on the bolt on the rear side of the through hole.

[0013] Beneficial effects:

[0014] The utility model can achieve that the hydraulic oil can only flow in one direction and cannot flow back through the self-locking device retaining ring, the hydraulic self-locking piston and the mechanical self-locking device, thereby ensuring the normal operation and use effect of the column type oil cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the plane structure of the utility model.

[0016] In the figure: 1, piston rod; 2, guide sleeve; 3, flange plate; 4, oil outlet hole; 5, first inner convex ring; 6, annular groove; 7, mechanical self-locking device; 8, hydraulic self-locking piston; 9, second inner convex ring; 10, oil inlet hole; 11, locking nut; 12, blind hole; 13, cylinder head; 14, piston buffer device; 15, cylinder barrel; 16, self-locking device retaining ring; 17, fastening sleeve; 18, cylinder head hole; 19, cylinder head, DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the technical solution of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present disclosure.

[0018] The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only part of the embodiments of the present disclosure, but not all of the embodiments.

[0019] Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present disclosure.

[0020] like Figure 1 As shown, the utility model provides a column-type self-locking oil cylinder, including a cylinder barrel 15, a cylinder head 19 matched with the cylinder barrel 15 is provided at the front end of the cylinder barrel 15, a cylinder cover 13 matched with the cylinder barrel 15 is provided at the rear end of the cylinder barrel 15, a flange plate 3 is connected to the front end of the cylinder head 19, a guide sleeve mounting hole is provided in the middle of the flange plate, a guide sleeve 2 is provided on the guide sleeve mounting hole, a piston rod 1 is provided in the guide sleeve 2, a rear end of the piston rod 1 is provided in the cylinder barrel 15, a hydraulic self-locking piston 8 is provided at the rear end of the piston rod 1, a piston buffer device 14 is sleeved on the piston rod 1 on the rear side of the hydraulic self-locking piston 8, a self-locking device retaining ring 16 is provided on the piston rod 1 on the front side of the hydraulic self-locking piston 14, and a front end of the inner wall of the cylinder barrel 15 is provided An annular groove 6, in which a mechanical self-locking device 7 is arranged, a first chamfered right angle is arranged at the connection between the rear end face of the self-locking device retaining ring 6 and the outer surface of the self-locking device retaining ring 6, and the front end of the mechanical self-locking device 7 contacts the inclined surface of the first chamfered right angle, a second chamfered right angle is arranged at the connection between the front end face of the hydraulic self-locking piston 8 and the outer surface of the hydraulic self-locking piston 8, and the rear end of the mechanical self-locking device 7 contacts the inclined surface of the second chamfered right angle, a cylinder head hole 18 is arranged in the middle of the cylinder head 19, and the cylinder head hole 18 passes through the cylinder head 19 front and back, a blind hole 12 is arranged on the front end face of the cylinder cover 13, an oil inlet hole 10 connected to the blind hole 12 is arranged on the outer wall of the cylinder cover 13, and an oil outlet hole 4 connected to the cylinder head hole 18 is arranged on the outer wall of the cylinder head 19.

[0021] This technical solution can achieve that the hydraulic oil can only flow in one direction and cannot flow back through the self-locking device retaining ring 16, the hydraulic self-locking piston 8 and the mechanical self-locking device 7, thereby ensuring the normal operation and use effect of the column cylinder.

[0022] Both the hydraulic self-locking piston 8 and the piston buffer device 14 are provided with oil passage holes communicating front and rear, so as to facilitate the hydraulic oil to flow from the rear end to the front end in the cylinder barrel 15 .

[0023] During operation, the oil inlet hole 10 is connected to the oil inlet nozzle, and the oil outlet hole 4 is connected to the oil outlet nozzle. The hydraulic oil enters the blind hole 12 from the oil inlet hole 10, and then the hydraulic self-locking piston 8 moves backward to make the hydraulic oil flow from the blind hole 12 through the hydraulic self-locking piston 8 and the oil path hole on the piston buffer device 14 to the front end of the cylinder 15, and then is discharged through the cylinder head hole 18 and the oil outlet hole 4.

[0024] For example, in some embodiments, the piston buffer device 14 is an anti-collision piston. The anti-collision piston can further protect the hydraulic self-locking piston 8, so that the hydraulic self-locking piston 8 is not easily deformed or damaged.

[0025] For example, in some embodiments, the front end of the self-locking device retaining ring 16 is provided with a fastening sleeve 17 for fastening to the piston rod 1, the fastening sleeve 17 is arranged in the cylinder head hole 18, the outer diameter of the self-locking device retaining ring 16 is smaller than the diameter of the annular groove 6, and the outer diameter of the fastening sleeve 17 is smaller than the diameter of the cylinder head hole 18. In this way, the self-locking device retaining ring 16 and the piston rod 1 can be more firmly matched, and the hydraulic oil can flow smoothly from back to front.

[0026] For example, in some embodiments, the rear end of the cylinder head 19 is provided with a first inner convex ring 5 that is matched and connected with the front end of the annular groove 6, and the front end of the cylinder cover 13 is provided with a second inner convex ring 9 that is matched and connected with the inner wall of the cylinder barrel 15. This can make the overall structure more firmly connected.

[0027] For example, in some embodiments, the mechanical self-locking device 7 is a circular ring, which includes two elastic semicircular rings. When the piston rod 1 drives the self-locking device retaining ring 16 to move backward, the two semicircular rings are squeezed by the self-locking device retaining ring 16 and automatically open. After opening, there is a gap between the two semicircular rings, and the hydraulic oil at the rear end of the cylinder barrel 15 will enter the cylinder head hole 5 through the gap and be discharged from the oil outlet 4. When the hydraulic self-locking piston 8 moves forward, the two semicircular rings will automatically rebound and shrink to their original positions under the action of elasticity to prevent the hydraulic oil from flowing back.

[0028] For example, in some embodiments, the front end of the semicircular ring is provided with a third chamfer corresponding to the first chamfer, and the rear end of the semicircular ring is provided with a fourth chamfer corresponding to the second chamfer. This facilitates the two semicircular rings to be automatically opened and subsequently reset when squeezed by the retaining ring 7 of the self-locking device.

[0029] For example, in some embodiments, the flange plate 3 is provided with four bolt holes, each of which is provided with a bolt, each of which is provided on the outside of the cylinder barrel 15, and through holes corresponding to the four bolt holes are provided at the four corners of the cylinder head, and the rear ends of the bolts pass through the through holes, and locking nuts 11 are provided on the bolts at the rear side of the through holes. This facilitates overall installation and maintenance. The front end surface of the cylinder head 19 is provided with a first groove that matches the guide sleeve 2, the rear end surface of the flange plate 3 is provided with a second groove, and the middle part of the guide sleeve 2 is provided with a guide sleeve clamping ring that matches the second groove, so that the guide sleeve 2 can be fixed and prevented from moving when the piston rod 1 moves back and forth.

[0030] In summary, the utility model can achieve one-way flow of hydraulic oil and prevent backflow through the self-locking device retaining ring, hydraulic self-locking piston and mechanical self-locking device, thereby ensuring the normal operation and use effect of the column cylinder.

[0031] The words "first", "second" and similar words used in the specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantitative limitation, but indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects.

[0032] "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0033] The above-mentioned preferred embodiments of the utility model are only and are not intended to limit the utility model. The protection scope of the utility model is defined by the attached claims. For ordinary technicians in this field, other embodiments can be obtained according to the drawings without creative work, and any changes based on the claims of the utility model are within the protection scope of the utility model.

Claims

1. A column-type self-locking cylinder, characterized in that: The invention comprises a cylinder, wherein a cylinder head matching with the cylinder is provided at the front end of the cylinder, a cylinder cover matching with the cylinder is provided at the rear end of the cylinder, a flange plate is connected to the front end of the cylinder head, a guide sleeve mounting hole is provided in the middle of the flange plate, a guide sleeve is provided on the guide sleeve mounting hole, a piston rod is provided in the guide sleeve, the rear end of the piston rod is provided in the cylinder, a hydraulic self-locking piston is provided at the rear end of the piston rod, a piston buffer device is provided on the piston rod at the rear side of the hydraulic self-locking piston, a self-locking device retaining ring is provided on the piston rod at the front side of the hydraulic self-locking piston, an annular groove is provided at the front end of the inner wall of the cylinder, and the annular groove is provided in the inner A mechanical self-locking device is provided, a first chamfered right angle is provided at the connection between the rear end face of the self-locking device retaining ring and the outer surface of the self-locking device retaining ring, the front end of the mechanical self-locking device contacts the inclined surface of the first chamfered right angle, a second chamfered right angle is provided at the connection between the front end face of the hydraulic self-locking piston and the outer surface of the hydraulic self-locking piston, the rear end of the mechanical self-locking device contacts the inclined surface of the second chamfered right angle, a cylinder head hole is provided in the middle of the cylinder head, the cylinder head hole passes through the cylinder head front and back, a blind hole is provided on the front end face of the cylinder cover, an oil inlet hole connected to the blind hole is provided on the outer wall of the cylinder cover, and an oil outlet hole connected to the cylinder head hole is provided on the outer wall of the cylinder head.

2. A column type self-locking cylinder according to claim 1, characterized in that: The piston buffer device is an anti-collision piston.

3. A column type self-locking cylinder according to claim 1, characterized in that: A fastening sleeve for fastening to the piston rod is provided at the front end of the self-locking device retaining ring, and the fastening sleeve is arranged in the cylinder head hole. The outer diameter of the self-locking device retaining ring is smaller than the diameter of the annular groove, and the outer diameter of the fastening sleeve is smaller than the diameter of the cylinder head hole.

4. A column type self-locking cylinder according to claim 1, characterized in that: The rear end of the cylinder head is provided with a first inner convex ring matched with the front end of the annular groove, and the front end of the cylinder cover is provided with a second inner convex ring matched with the inner wall of the cylinder barrel.

5. A column type self-locking cylinder according to claim 1, characterized in that: The mechanical self-locking device is a circular ring, which includes two elastic semicircular rings.

6. A column type self-locking cylinder according to claim 5, characterized in that: The front end of the semicircular ring is provided with a third chamfered right angle corresponding to the first chamfered right angle, and the rear end of the semicircular ring is provided with a fourth chamfered right angle corresponding to the second chamfered right angle.

7. A column type self-locking cylinder according to claim 1, characterized in that: The flange plate is provided with four bolt holes, each of which is provided with a bolt, and each of which is provided on the outside of the cylinder barrel. Through holes corresponding to the four bolt holes are provided at the four corners of the cylinder cover, and the rear end of the bolt passes through the through hole, and a locking nut is provided on the bolt on the rear side of the through hole.

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