Swing Linear Cylinder

Abstract

The present invention relates to the technical field of linear cylinders, and in particular to a swinging linear cylinder, comprising a cylinder barrel, an end cover, the end cover being fixedly arranged at the front end of the cylinder barrel, a piston rod, one end of the piston rod being located in the cylinder barrel, the other end passing through the bottom end of the cylinder barrel, and a piston being arranged on one end of the piston rod; a guide rod, one end of the guide rod being arranged on the end cover, a sliding guide structure being arranged between the guide rod and the piston rod, and the other end of the guide rod and one end of the piston rod slidingly cooperate with each other through the sliding guide structure, so that the piston rod can perform a reciprocating motion and a rotating motion at the same time. In the swinging linear cylinder of the present invention, the swinging motion is combined with the linear motion, so that the piston rod can perform a swinging motion while performing a reciprocating motion, and the outer end of the piston rod is connected to an external device, so that the entire device has a compact structure, requires a small installation space, is simple to install, has a low failure rate, and the setting of the locking mechanism can prevent the ball from getting stuck, and is convenient for disassembly, assembly and maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of linear cylinders, and in particular to a swing linear cylinder. Background Art

[0002] The movement form of traditional high-pressure cylinders is mainly linear reciprocating motion, which can basically meet the motion requirements of various industries such as engineering machinery, port machinery and industrial equipment. With the development of various industries, the application scenarios of equipment are increasing, and higher performance and functional requirements are put forward for mechanical equipment in various industries. Under the above background, the movement form requirements of cylinders in the application of mechanical equipment in various industries are gradually diversified.

[0003] In the metallurgical and forging industries, there is a need for an oil cylinder that can first swing a certain angle and then perform linear motion. Previously, the swinging motion was mainly achieved through a mechanical structure, and the linear motion was achieved using an oil cylinder. This made the entire equipment structure bloated and complex, requiring a large installation space and a high failure rate. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in order to solve the technical problem that in the prior art, a mechanical structure is used to realize a swinging motion, and then a cylinder is used to realize a linear motion, which results in a bloated structure of the entire equipment, a large required installation space, and a high failure rate, the present invention provides a swinging linear cylinder, which combines the swinging motion with the linear motion, and has a compact structure, a small required installation space, simple installation, and a low failure rate.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a swing linear oil cylinder, including a cylinder barrel, wherein a channel extending along its axial direction is defined in the cylinder barrel; an end cover, wherein the end cover is fixedly arranged at the front end of the cylinder barrel, and a closed oil pressure chamber is formed between the channel in the cylinder barrel and the end cover; a piston rod, wherein one end of the piston rod is located in the oil pressure chamber, and the other end passes through the bottom end of the cylinder barrel, and a piston is also arranged on one end of the piston rod; a guide rod, wherein one end of the guide rod is arranged on the end cover, and a sliding guide structure is arranged between the guide rod and the piston rod, and the other end of the guide rod and one end of the piston rod are slidably matched by the sliding guide structure, so that the piston rod can reciprocate and rotate at the same time. The piston rod of the swing linear oil cylinder of the present invention can rotate simultaneously during the back-and-forth reciprocating motion, so that the components connected to the extended end of the piston rod can be controlled by the connection of the transmission components to realize the linear and swinging composite motion.

[0006] Further, specifically, a hole-shaped guide groove is provided inwardly along the axis direction of the center of one end of the piston rod, the other end of the guide rod is located in the guide groove, and the two slide together, the sliding guide structure includes a ball, an arc-shaped groove is provided on the inner wall of the guide groove, a track groove is provided on the guide rod, and the ball is partially located in the track groove and partially located in the guide groove. The forward and backward movement of the piston rod can make the ball move in the track groove along the direction of the track groove, so that the movement of the piston rod coincides with the rotation direction restricted by the track groove.

[0007] Furthermore, in order to ensure that the piston rod rotates during movement, the track groove includes at least a spiral segment.

[0008] Furthermore, in order to facilitate buffering, the track groove further includes a first straight line segment and a second straight line segment, and the first straight line segment and the second straight line segment are respectively arranged at two ends of the spiral segment.

[0009] Furthermore, in order to prevent the piston rod from suddenly malfunctioning when it rotates to a certain angle during operation, causing the ball bearing to get stuck, and the outside of the piston rod being connected to external equipment and unable to be removed for repair, the swing linear cylinder also includes a locking mechanism, which is arranged on the end cover and the guide rod and can lock the relative movement of the guide rod and the plug rod.

[0010] Further, specifically, the locking mechanism includes a locking screw, an elastic component and a steel ball. A first slot is provided on the part of one end of the guide rod located in the end cover. The end cover is provided with a mounting hole in the radial direction. The elastic component and the locking screw are arranged in the mounting hole from the inside to the outside, and the locking screw is threadedly connected to the mounting hole. The elastic component can be pressed against the outer ring of the guide rod by adjusting the locking screw. The steel ball is partially located in the first slot and partially located in the elastic component. By rotating the locking screw, the locking degree of the steel ball in the first slot can be controlled. When the plug rod rotates to a certain angle during operation and suddenly fails, and the ball is stuck, the locking screw can be turned to loosen the spring force to release the locking of the ball on the guide rod, so that the guide rod can rotate freely, solving the problem of the ball being stuck.

[0011] Further, preferably, the elastic component includes a spring seat and a spring, the bottom surface of the spring seat is provided with a second slot, the steel ball is partially located in the first slot and partially located in the second slot, and the spring is arranged between the spring seat and the locking screw.

[0012] Further, specifically, in order to facilitate oil inlet and oil return, the piston divides the oil pressure chamber into a rod chamber and a rodless chamber, and the cylinder is provided with a first oil port connected to the rod chamber, and a second oil port connected to the rodless chamber.

[0013] Further, specifically, in order to ensure sealing, a sealing member is provided between the piston and the cylinder.

[0014] Further, specifically, in order to ensure sealing, a sealing member is provided between the end cover and the cylinder barrel.

[0015] Further, specifically, in order to ensure sealing, a sealing member is provided between the piston rod and the bottom end of the cylinder.

[0016] The beneficial effect of the present invention is that the swinging linear cylinder of the present invention combines the swinging motion with the linear motion, so that the piston rod can perform a swinging motion while performing a reciprocating motion. The outer end of the piston rod is connected to an external device, so that the entire device has a compact structure, requires a small installation space, is simple to install, and has a low failure rate. The setting of the locking mechanism can avoid the situation where the ball is stuck and the piston rod cannot be removed for maintenance, thereby facilitating disassembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a sectional view of a front view of a swing linear cylinder according to the best embodiment of the present invention.

[0019] Figure 2 It is a cross-sectional view of a top view of a swing linear cylinder according to the best embodiment of the present invention.

[0020] Figure 3 It is a structural schematic diagram of the guide rod.

[0021] Figure 4 It is a structural diagram of the piston and piston rod.

[0022] In the figure: 1, cylinder; 2, end cover; 3, piston rod; 4, piston; 5, guide rod; 31, guide groove; 6, ball; 32, arc groove; 51, track groove; 511, spiral segment; 512, first straight segment; 513, second straight segment; 71, locking screw; 72, steel ball; 52, first groove; 73, spring seat; 74, spring; 731, second groove; 11, rod cavity; 12, rodless cavity. DETAILED DESCRIPTION

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0024] like Figure 1-4The figure shows the best embodiment of the present invention, which is a swing linear oil cylinder, including a cylinder barrel 1, a passage extending along the axial direction of the cylinder barrel 1 is defined in the cylinder barrel 1, an end cover 2 is fixedly arranged at the front end of the cylinder barrel 1, a closed oil pressure chamber is formed between the passage in the cylinder barrel 1 and the end cover 2, a piston rod 3, one end of the piston rod 3 is located in the oil pressure chamber, and the other end passes through the bottom end of the cylinder barrel 1, and a piston 4 is also arranged on one end of the piston rod 3, and the piston 4 divides the oil pressure chamber into a rod chamber 11 and a rodless chamber 12, and a first oil port connected to the rod chamber 11 and a second oil port connected to the rodless chamber 12 are arranged on the cylinder barrel 1, and a seal is arranged between the piston 4 and the cylinder barrel 1. A seal is arranged between the end cover 2 and the cylinder barrel 1. A seal is arranged between the piston rod 3 and the bottom end of the cylinder barrel 1.

[0025] like Figure 1-4 As shown, a guide rod 5, one end of which is arranged on the end cover 2, and a sliding guide structure is arranged between the guide rod 5 and the piston rod 3. Through the sliding guide structure, the other end of the guide rod 5 and one end of the piston rod 3 are slidably matched, so that the piston rod 3 can perform reciprocating motion and rotational motion at the same time.

[0026] like Figure 1-4 As shown, a hole-shaped guide groove 31 is opened inwardly along the axial direction at the center of one end of the piston rod 3, and the other end of the guide rod 5 is located in the guide groove 31, and they slide with each other. The sliding guide structure includes a ball 6, and an arc-shaped groove 32 is provided on the inner wall of the guide groove 31. A track groove 51 is opened on the guide rod 5, and the ball 6 is partially located in the track groove 51 and partially located in the guide groove 31.

[0027] like Figure 1-4 As shown, the track groove 51 includes a spiral segment 511 , a first straight segment 512 and a second straight segment 513 , and the first straight segment 512 and the second straight segment 513 are respectively arranged at two ends of the spiral segment 511 .

[0028] like Figure 1-4 As shown, the swing linear oil cylinder also includes a locking mechanism, which is arranged on the end cover 2 and the guide rod 5, and can lock the relative movement between the guide rod 5 and the plug rod 3. That is, it is used to lock the guide rod 5 so that it cannot rotate. The rotation locking mechanism includes a locking screw 71, an elastic component and a steel ball 72. A first card slot 52 is provided on the part of one end of the guide rod 5 located in the end cover 2. The end cover 2 is provided with a mounting hole in the radial direction. The elastic component and the locking screw 71 are sequentially arranged in the mounting hole from the inside to the outside, and the locking screw 71 is threadedly connected to the mounting hole. The elastic component can be pressed against the outer ring of the guide rod 5 by adjusting the locking screw 71. The steel ball 72 is partially located in the first card slot 52 and partially located in the elastic component.

[0029] like Figure 1-4As shown, the elastic component includes a spring seat 73 and a spring 74. The bottom surface of the spring seat 73 is provided with a second slot 731. The steel ball 72 is partially located in the first slot 52 and partially located in the second slot 731. The spring 74 is arranged between the spring seat 73 and the locking screw 71.

[0030] Working principle: Figure 1 Take the middle perspective as an example. When the rodless chamber 12 is filled with oil, the rod chamber 11 returns oil, and the piston rod 3 is forced to move to the right under the action of oil pressure. However, the ball 6 in the guide groove 31 in the piston rod 3 can only move along the track groove 51 on the guide rod 5, forcing the piston rod 3 to move linearly to the right while rotating. The track groove 51 on the guide rod 5 is divided into a spiral segment 511, a first straight segment 512, and a second straight segment 513. When the piston rod 3 moves to the right, the ball 6 in the piston rod 3 moves to the straight segment of the track groove, and the piston rod 3 moves linearly; when the ball 6 in the piston rod 3 moves to the spiral segment 511, the piston rod 3 rotates. The length of the spiral segment 511 can control the rotation angle of the piston rod 3. Thus, the piston rod 3 can achieve a compound motion of linear and rotation. When the rod chamber 11 is filled with oil, the rodless chamber 12 returns oil, and the piston rod 3 can move to the left and rotate in the opposite direction. Finally, reciprocating linear and rotational swinging is achieved.

[0031] The spring seat 73, spring 74 and locking screw 71 at the end cover 2 are mainly used for maintenance after the equipment fails. When the piston rod 3 rotates to a certain angle during operation and suddenly fails, the ball 6 is stuck. At this time, since the piston 3 is connected to the external equipment, it cannot be directly removed for maintenance. The piston rod 3 must be rotated to a certain angle and disconnected from the equipment before it can be removed. Therefore, at this time, the locking screw 71 can be loosened to release the spring force of the spring 74 and release the locking of the steel ball 72 on the guide rod 5, so that the piston rod 3 can rotate freely, which is convenient for disassembling the piston rod 3 for maintenance.

[0032] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A swing linear cylinder, characterized in that: include A cylinder barrel (1), wherein the cylinder barrel (1) defines a channel extending along its axial direction. The end cover (2) is fixedly arranged at the front end of the cylinder barrel (1), and a closed oil pressure chamber is formed between the channel in the cylinder barrel (1) and the end cover (2). A piston rod (3), one end of the piston rod (3) is located in the oil pressure chamber, and the other end passes through the bottom end of the cylinder (1), and a piston (4) is also arranged on one end of the piston rod (3). A guide rod (5), one end of which is arranged on the end cover (2), a sliding guide structure is arranged between the guide rod (5) and the piston rod (3), the other end of the guide rod (5) and one end of the piston rod (3) are slidably matched, and the sliding guide structure enables the piston rod (3) to perform a rotational motion while reciprocating; A hole-shaped guide groove (31) is provided inwardly along the axial direction of the center of one end of the piston rod (3); the other end of the guide rod (5) is located in the guide groove (31) and slides with each other; the sliding guide structure comprises a ball (6); an arc-shaped groove (32) is provided on the inner wall of the guide groove (31); a track groove (51) is provided on the guide rod (5); part of the ball (6) is located in the track groove (51) and part of the ball (6) is located in the arc-shaped groove (32); A locking mechanism, wherein the locking mechanism is arranged on the end cover (2) and the guide rod (5), and is capable of locking the relative movement between the guide rod (5) and the piston rod (3); the locking mechanism comprises a locking screw (71), an elastic component and a steel ball (72); a first clamping groove (52) is provided on a portion of one end of the guide rod (5) located inside the end cover (2); a mounting hole is provided on the end cover (2) in a radial direction; the elastic component and the locking screw (71) are arranged in sequence in the mounting hole from inside to outside, and the locking screw (71) is threadedly connected to the mounting hole. The elastic component can be pressed against the outer ring of the guide rod (5) by adjusting the locking screw (71); the steel ball (72) is partially located in the first slot (52) and partially located in the elastic component; the elastic component comprises a spring seat (73) and a spring (74); a second slot (731) is provided on the bottom surface of the spring seat (73); the steel ball (72) is partially located in the first slot (52) and partially located in the second slot (731); the spring (74) is arranged between the spring seat (73) and the locking screw (71).

2. The oscillating linear cylinder according to claim 1, characterized in that: The track groove (51) comprises a spiral section (511).

3. The oscillating linear cylinder according to claim 2, characterized in that: The track groove (51) further comprises a first straight line segment (512) and a second straight line segment (513), wherein the first straight line segment (512) and the second straight line segment (513) are respectively arranged at two ends of the spiral segment (511).

4. The oscillating linear cylinder according to claim 1, characterized in that: The piston (4) divides the oil pressure chamber into a rod chamber (11) and a rodless chamber (12); the cylinder barrel (1) is provided with a first oil port connected to the rod chamber (11) and a second oil port connected to the rodless chamber (12).

5. The oscillating linear cylinder according to claim 1, characterized in that: A sealing member is provided between the piston (4) and the cylinder (1).

6. The oscillating linear cylinder according to claim 1, characterized in that: A sealing member is provided between the end cover (2) and the cylinder barrel (1).

7. The oscillating linear cylinder according to claim 1, characterized in that: A sealing member is provided between the piston rod (3) and the bottom end of the cylinder barrel (1).

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