Supporting and anti-rotation mechanism for piston rod of injection oil cylinder

Abstract

The utility model relates to the technical field of piston rod supporting and positioning, and particularly discloses a supporting and anti-rotation mechanism of an injection oil cylinder piston rod, which comprises a sliding supporting assembly, the sliding supporting assembly comprises a guide rail and a cushion block, the guide rail is laid at the bottom of a cylinder body along the length direction of the cylinder body, and the cushion block is movably arranged on the guide rail. The connecting piece is detachably connected with the cushion block, the bottom of the connecting piece can be attached to the top of the cushion block, when the piston rod translates, the piston rod can drive the injection rod to move through the connecting piece, in the process, the connecting piece can drive the cushion block to move, and the cushion block moves on the guide rail to provide moving support for the piston rod; meanwhile, when the piston rod tends to rotate, the bottom face of the connecting piece can abut against the top face of the cushion block so as to limit rotation of the piston rod, and the limiting effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of piston rod positioning support, in particular to a support and anti-rotation mechanism for the piston rod of an injection oil cylinder. Background Art

[0002] The piston rod of the injection cylinder is the main driving part used to drive the injection rod to perform injection and ejection actions. In order to ensure the accuracy of injection and ejection, it is necessary to provide support for the piston rod, and at the same time, it is also necessary to limit the rotation of the piston rod so that it can ensure horizontal movement along the axis of the cylinder.

[0003] In the prior art, such as the patent with application number 2014105129485 and invention name "Anti-rotation support device for piston rod on large injection oil cylinder", it is disclosed that an adjustment support mechanism and a linear sliding mechanism are arranged between the piston rod and the frame of the injection molding machine, wherein the adjustment support mechanism includes an adjustment support rod and a locking nut, and the linear sliding mechanism includes a guide rail, a slider and a support seat laid on the frame, the support seat is fixedly connected to the slider, the slider is slidably arranged on the guide rail, the upper end of the adjustment support rod is threadedly engaged with one end of the piston rod, and the lower end of the adjustment support rod is threadedly engaged with the upper end of the support seat. If the linear sliding mechanism is connected to the socket of the piston rod, it can provide sliding support for the piston rod to meet the needs of support and translation; however, it has the following disadvantages: 1. When the piston rod is supported horizontally by the adjusting mechanism, it is necessary to first adjust the installation of the support rod, which is more troublesome and depends on the experience and ability of the operator; 2. Since the linear sliding mechanism is arranged on the frame as a whole and the injection cylinder is installed on the injection seat, it is easy to have assembly errors, which may lead to poor actual support effect; 3. When the rotation of the piston rod is limited by adjusting the support rod, it is equivalent to a point limit, and there will be a certain offset. Summary of the invention

[0004] The utility model is made in consideration of the above-mentioned problems. The utility model aims to provide a support and anti-rotation mechanism for the piston rod of an injection cylinder. The piston rod has high positioning accuracy and is integrated in the injection cylinder with high assembly accuracy.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a support and anti-rotation mechanism for the piston rod of an injection oil cylinder, wherein the injection oil cylinder comprises a cylinder body, a piston rod and an injection rod, wherein the piston rod and the injection rod are both movably arranged in the cylinder body, one end of the injection rod can extend to the outside of the cylinder body, and one end of the piston rod is connected to an end of the injection rod located inside the cylinder body through a connecting piece, and the support and anti-rotation mechanism comprises:

[0006] A sliding support assembly, comprising a guide rail and a cushion block, wherein the guide rail is laid on the bottom of the cylinder body along the length direction of the cylinder body, and the cushion block is movably arranged on the guide rail;

[0007] The connecting piece is detachably connected to the cushion block, and the bottom of the connecting piece can be fitted with the top of the cushion block.

[0008] According to the above-mentioned support and anti-rotation mechanism for the piston rod of an injection cylinder, the injection cylinder also includes a barrel installed at the front end of the cylinder body, one end of the barrel can be extended into the cylinder body, one end of the injection rod can be extended into the barrel, and a guide sleeve is provided on the inner side of the rear end of the barrel. When the piston rod moves to a preset position, the front end face of the connecting piece can abut against the rear end face of the guide sleeve.

[0009] According to the above-mentioned support and anti-rotation mechanism for the piston rod of an injection cylinder, the connecting part is configured as a connecting flange, a first pin hole is provided at the bottom of the connecting flange, a second pin hole is provided at the top of the cushion block, the first pin hole can be connected to the second pin hole, and a pin is provided in the connecting hole between the first pin hole and the second pin hole, and one end of the pin is fixed in the first pin hole or the second pin hole.

[0010] According to the above-mentioned support and anti-rotation mechanism for the piston rod of an injection cylinder, one end of the pin is fixed in the first pin hole, and an assembly bevel groove is provided on the rear side of the second pin hole. When the pin moves toward the rear side, the pin can be detached from the first pin hole through the assembly bevel groove.

[0011] According to the above-mentioned support and anti-rotation mechanism for the piston rod of an injection cylinder, the sliding support assembly also includes a baffle, which is fixed to the connecting flange by screws, and the rear end of the baffle abuts against the front end surface of the cushion block.

[0012] According to the above-mentioned support and anti-rotation mechanism for the piston rod of an injection cylinder, the sliding support assembly further comprises a sliding block, the sliding block is slidably disposed on the guide rail, and the cushion block is fixed on the sliding block.

[0013] The utility model has the following beneficial effects:

[0014] 1. The connection of the connecting flange, gasket and guide rail is rigid, which is not limited by the operator's ability and experience. The piston rod can be guaranteed not to be overloaded by ensuring the processing accuracy. Compared with the existing technology, the supporting effect of the piston rod is better;

[0015] 2. Since the lower surface of the connecting flange fits with the top surface of the pad, when the piston rod rotates, the connecting flange and the pad will be limited to prevent it from rotating. Since the surface limit is adopted, the limiting effect is better, the piston rod cannot make a small rotation, and the positioning accuracy is higher;

[0016] 3. The whole is integrated in the injection cylinder, the span between the piston rod and the guide rail is small, and the assembly accuracy is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the embodiment.

[0018] In the figure:

[0019] 1. Cylinder body; 2. Piston rod; 3. Injection rod; 4. Connecting flange; 5. Guide rail; 6. Spacer; 7. Barrel; 8. Guide sleeve; 9. Pin; 10. Baffle. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0021] like Figure 1 As shown, in the present application, the injection cylinder includes a cylinder body 1, a piston rod 2 and an injection rod 3. The piston rod 2 and the injection rod 3 are both movably arranged in the cylinder body 1. One end of the injection rod 3 can extend to the outside of the cylinder body 1. One end of the piston rod 2 is connected to the end of the injection rod 3 located on the inner side of the cylinder body 1 through a connecting piece. Then, the piston rod 2 can drive the injection rod 3 to perform injection and ejection actions through the connecting piece.

[0022] In this embodiment, a support and anti-rotation mechanism for the piston rod 2 of the injection cylinder includes a sliding support assembly, which includes a guide rail 5 and a cushion block 6. The guide rail 5 is laid on the bottom of the cylinder body 1 along the length direction of the cylinder body 1. The cushion block 6 is movably arranged on the guide rail 5. The connecting piece is detachably connected to the cushion block 6, and the bottom of the connecting piece can be fitted with the top of the cushion block 6. When the piston rod 2 is translated, it will drive the injection rod 3 to move through the connecting piece. In this process, the connecting piece will drive the cushion block 6 to move, and the cushion block 6 moves on the guide rail 5. , to provide mobile support for the piston rod 2, and also to provide mobile support for the injection rod 3, to prevent the piston rod 2 and the injection rod 3 from sagging, and to improve the injection accuracy. At the same time, when the piston rod 2 has a rotation tendency, the bottom surface of the connecting piece can abut against the top surface of the cushion block 6 to limit the rotation of the piston rod 2. The limiting effect is good, and the piston rod 2 is rigidly connected to the connecting piece, the connecting piece is rigidly connected to the cushion block 6, and the cushion block 6 is rigidly connected to the guide rail 5. No manual adjustment is required. Therefore, the placement accuracy of the piston rod 2 can be ensured by the processing accuracy of each component, and is not limited by experience.

[0023] Specifically, the injection cylinder also includes a barrel 7 installed at the front end of the cylinder body 1, one end of the barrel 7 can be extended into the cylinder body 1, and one end of the injection rod 3 can be extended into the barrel 7. The injection rod 3 is used to drive the material in the barrel 7 out of the barrel 7 for injection. A guide sleeve 8 is provided on the inner side of the rear end of the barrel 7. When the piston rod 2 moves to the preset position, the front end face of the connecting piece can abut against the rear end face of the guide sleeve 8. In this embodiment, the preset position refers to the maximum extension length position of the piston rod 2. At this time, there is usually a distance between the connecting piece and the inner wall of the barrel 7. The existence of this distance will cause the piston rod 2 to shake, and the guide sleeve 8 can eliminate this distance to limit the rotation and shaking of the piston rod 2.

[0024] In order to realize the detachable connection between the connecting member and the cushion block 6, the connecting member is configured as a connecting flange 4, a first pin hole is provided at the bottom of the connecting flange 4, a second pin hole is provided at the top of the cushion block 6, the first pin hole can be connected with the second pin hole, and a pin 9 is provided in the connecting hole between the first pin hole and the second pin hole, one end of the pin 9 is fixed in the first pin hole or the second pin hole, the connection between the connecting block and the cushion block 6 is realized by the pin 9, and they can be separated by pulling out the pin 9, which is convenient for maintenance and replacement.

[0025] To facilitate the assembly of the pin 9, one end of the pin 9 is fixed in the first pin hole, and an assembly bevel groove is provided on the rear side of the second pin hole. When the pin 9 moves rearward, the pin 9 can be disengaged from the first pin hole through the assembly bevel groove. The pin 9 can be assembled and removed only through the assembly bevel groove. In order to prevent the pin 9 from disengaging from the first pin hole when the piston rod 2 is retreating, the sliding support assembly also includes a baffle 10, which is fixed to the connecting flange 4 by screws, and the rear end of the baffle 10 abuts against the front end surface of the cushion block 6. During the retreat of the piston rod 2, it drives the connecting flange 4 to retreat together, and the connecting flange 4 drives the cushion block 6 to retreat through the baffle 10, which can effectively prevent the pin 9 from slipping out.

[0026] In order to realize the sliding of the pad 6 on the guide rail 5, the sliding support assembly also includes a slider, which is slidably arranged on the guide rail 5. The pad 6 is fixed on the slider, and the sliding of the pad on the guide rail 5 can be realized through the slider, with small movement resistance.

[0027] The technical solution of the utility model is described in detail above in conjunction with the accompanying drawings, and the described embodiments are used to help understand the idea of ​​the utility model. The specific embodiments described herein are merely examples of the spirit of the utility model. A person skilled in the art of the utility model may make various modifications or supplements to the described specific embodiments or replace them in a similar manner, but this will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A support and anti-rotation mechanism for a piston rod of an injection cylinder, the injection cylinder comprising a cylinder body, a piston rod and an injection rod, the piston rod and the injection rod are both movably arranged in the cylinder body, one end of the injection rod can extend to the outside of the cylinder body, one end of the piston rod is connected to an end of the injection rod located inside the cylinder body through a connecting piece, characterized in that: The support and anti-rotation mechanism comprises: A sliding support assembly, comprising a guide rail and a cushion block, wherein the guide rail is laid on the bottom of the cylinder body along the length direction of the cylinder body, and the cushion block is movably arranged on the guide rail; The connecting piece is detachably connected to the cushion block, and the bottom of the connecting piece can be fitted with the top of the cushion block.

2. The support and anti-rotation mechanism for the piston rod of an injection cylinder according to claim 1, characterized in that: The injection cylinder also includes a barrel installed at the front end of the cylinder body, one end of the barrel can be extended into the cylinder body, one end of the injection rod can be extended into the barrel, and a guide sleeve is provided on the inner side of the rear end of the barrel. When the piston rod moves to a preset position, the front end face of the connecting piece can abut against the rear end face of the guide sleeve.

3. The support and anti-rotation mechanism for the piston rod of an injection cylinder according to claim 1 or 2, characterized in that: The connecting member is configured as a connecting flange, a first pin hole is provided at the bottom of the connecting flange, a second pin hole is provided at the top of the cushion block, the first pin hole can be connected to the second pin hole, and a pin is provided in the connecting hole between the first pin hole and the second pin hole, and one end of the pin is fixed in the first pin hole or the second pin hole.

4. The support and anti-rotation mechanism for the piston rod of an injection cylinder according to claim 3, characterized in that: One end of the pin is fixed in the first pin hole, and a mounting bevel groove is provided at the rear side of the second pin hole. When the pin moves toward the rear side, the pin can be separated from the first pin hole through the mounting bevel groove.

5. The support and anti-rotation mechanism for the piston rod of an injection cylinder according to claim 4, characterized in that: The sliding support assembly also includes a baffle, which is fixed to the connecting flange by screws, and the rear end of the baffle abuts against the front end surface of the cushion block.

6. The support and anti-rotation mechanism for the piston rod of an injection cylinder according to claim 1, characterized in that: The sliding support assembly also includes a sliding block, which is slidably arranged on the guide rail, and the cushion block is fixed on the sliding block.

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