Stroke control device and cylinder

Abstract

The present application relates to a stroke control device and a cylinder, and relates to the technical field of pneumatic components. The stroke control device includes a bracket connected to the cylinder body, a movable plate connected to the piston rod, at least two blocking assemblies spaced apart on the bracket, and a control member for pushing the blocking assemblies to slide. The blocking assembly includes a mounting bracket slidably connected to the bracket, a rotating plate connected to the mounting bracket, and a blocking portion connected to one end of the rotating plate, the blocking portion being used to block the movable plate. The control member is used to push the mounting bracket to move closer to the piston rod, so that the blocking assembly has a control state close to the piston rod and a release state away from the piston rod. The present application utilizes the control member to drive the blocking assembly to switch states, thereby adjusting the cylinder stroke, achieving multi-stroke control, and high stroke control accuracy.

Description

Technical Field

[0001] The present application relates to the field of pneumatic components, and in particular to a stroke control device and a cylinder. Background Art

[0002] A cylinder is a pneumatic actuator that converts the pressure energy of compressed gas into mechanical energy. It is classified into two types: reciprocating linear motion and reciprocating oscillating motion. Reciprocating linear motion cylinders are further categorized into single-acting cylinders, double-acting cylinders, diaphragm cylinders, impact cylinders, and rodless cylinders.

[0003] Cylinder stroke refers to the round-trip distance of the cylinder piston. For most cylinders, the stroke is fixed, making it difficult to control. To achieve stroke control, a three-position, five-way directional valve is used. While this allows the cylinder to stop mid-stroke, it cannot maintain an intermediate stop position for long periods of time, and its accuracy is low, making it inadequate for precise stroke control.

[0004] The method of setting a stopper at the positioning point is relatively reliable. Once the piston rod of the cylinder contacts the stopper, it cannot move further, and high-precision positioning can be achieved. However, the adjustment of the stopper is more troublesome, and it is not easy to adjust the stroke of the cylinder at any time. Summary of the Invention

[0005] In order to achieve high-precision control of the cylinder stroke, the present application provides a stroke control device and a cylinder.

[0006] In the first aspect, the present application provides a stroke control device adopting the following technical solution:

[0007] A stroke control device includes a bracket connected to a cylinder body, a movable plate connected to a piston rod, at least two blocking assemblies spaced apart on the bracket, and a control member for pushing the blocking assemblies to slide;

[0008] The blocking assembly includes a mounting bracket slidably connected to the bracket, a rotating plate connected to the mounting bracket, and a blocking portion connected to one end of the rotating plate, wherein the blocking portion is used to block the movable plate;

[0009] The control member is used to push the mounting bracket to move closer to the piston rod, so that the blocking assembly has a control state close to the piston rod and a release state away from the piston rod;

[0010] When the blocking assembly is in a controlled state, the blocking portion can limit the position of the movable plate during the cylinder stroke;

[0011] When the blocking assembly is in the released state, the movable plate will not contact the blocking portion during the cylinder stroke.

[0012] By adopting the above technical solution, blocking components are set at multiple target stroke positions. When the cylinder needs to move to one of the target stroke positions, the control component is used to adjust the state of the blocking component at that location to the control state. After the piston rod of the cylinder is extended, the movable plate is restricted by the blocking part and the piston rod cannot continue to extend, thereby playing a role in stroke control.

[0013] The control component can be used to drive the blocking component to switch its state, thereby adjusting the cylinder stroke to achieve multi-stroke control with high stroke control accuracy.

[0014] Optionally, the end of the rotating plate close to the blocking portion is connected to a first sliding rod, the mounting frame is provided with a first hole for the first sliding rod to slide, the end of the rotating plate away from the blocking portion is connected to a second sliding rod, the mounting frame is provided with a second hole for the second sliding rod to slide, and a buffer spring is provided between the inner wall of the end of the second hole away from the first hole and the second sliding rod.

[0015] By adopting the above technical solution, after the blocking part is subjected to the force of the movable plate, the rotating plate is deflected, the first sliding rod slides along the first hole, the second sliding rod slides along the second hole, and the buffer spring absorbs the force and compresses until the first sliding rod slides to the end of the first hole close to the second hole. At this time, the blocking part can still limit the movable plate.

[0016] The buffer spring can buffer the impact force on the blocking part, thereby preventing the blocking part from being deformed due to long-term impact, thereby ensuring that the stroke control accuracy is not affected.

[0017] Optionally, the outer side surface of the blocking portion is divided into a contact surface and a blocking surface;

[0018] When the first sliding rod is located at the end of the first hole away from the second hole, the contact surface is used to contact the movable plate;

[0019] When the first sliding rod is located at one end of the first hole close to the second hole, the blocking surface is used to contact the movable plate.

[0020] By adopting the above technical solution, the contact surface is used to absorb impact force, while the blocking surface does not serve as a force-bearing contact surface, which is conducive to ensuring stroke control accuracy.

[0021] Optionally, the blocking portion is connected to a buffer pad at the contact surface.

[0022] By adopting the above technical solution, the buffer pad can initially buffer the impact force, reducing the damage and deformation caused by the collision to the movable plate and the blocking part.

[0023] Optionally, the mounting frame is provided with a slide groove connected to the second hole, a positioning strip is slidably provided inside the slide groove, the positioning strip is provided with a clearance hole for the second slide rod to pass through, the outer side of the positioning strip is connected to a limit strip, the inner wall of the slide groove is connected to a limit groove for the limit strip to slide, and a positioning spring is provided between the inner wall of the limit groove and the limit strip;

[0024] When the second sliding rod is located at a side of the positioning bar away from the first hole, the first sliding rod is located at an end of the first hole close to the second hole.

[0025] By adopting the above technical solution, the positioning bar can position the blocking part and the rotating plate in the compressed state, so that the remaining blocking components in the released state can be retracted without affecting the movement of the movable plate.

[0026] Optionally, the control member includes a slide bar slidably connected to the bracket and a control block connected to the slide bar, an extrusion slope is provided on one side of the control block, and a pressure slope matching the extrusion slope is provided on the side of the mounting frame close to the control block.

[0027] By adopting the above technical solution, the blocking component can be driven to switch from the released state to the controlled state by sliding the control member.

[0028] Optionally, an unlocking slope is provided at one end of the positioning bar extending out of the slide slot.

[0029] By adopting the above technical solution, the control part switches the blocking assembly from the released state to the controlled state, and at the same time squeezes the positioning bar, so that the second slide rod is unlocked, and the buffer spring applies a thrust to the second slide rod, and the blocking part rotates out.

[0030] Optionally, a release spring is connected between the mounting bracket and the support.

[0031] By adopting the above technical solution, after the control member slides away, the blocking component can automatically switch back to the released state.

[0032] Optionally, the slide bar is connected to a push handle.

[0033] By adopting the above technical solution, it is convenient for people to push the control part manually.

[0034] In a second aspect, the present application provides a cylinder adopting the following technical solution:

[0035] A cylinder includes a stroke control device.

[0036] In summary, this application includes at least one of the following beneficial technical effects:

[0037] 1. The control component can drive the blocking component to switch the control state and the release state, thereby adjusting the cylinder stroke to achieve multi-stroke control with high stroke control accuracy.

[0038] 2. By setting the buffer spring, the impact force on the blocking part is buffered, which can prevent the blocking part from being deformed due to long-term impact, thereby ensuring that the stroke control accuracy is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic structural diagram of a cylinder with a stroke control device according to an embodiment of the present application;

[0040] Figure 2 1 is a schematic structural diagram of a stroke control device according to an embodiment of the present application;

[0041] Figure 3 yes Figure 2 A magnified schematic diagram of area A in the middle;

[0042] Figure 4 is a schematic structural diagram of a blocking component in an initial state according to an embodiment of the present application;

[0043] Figure 5 is a schematic structural diagram of a rotating plate and a blocking portion according to an embodiment of the present application;

[0044] Figure 6 is a schematic top view of a blocking assembly according to an embodiment of the present application;

[0045] Figure 7 yes Figure 6 Schematic cross-sectional view along line BB;

[0046] Figure 8 is a schematic structural diagram of a positioning bar according to an embodiment of the present application;

[0047] Figure 9 This is a structural diagram of the blocking component in the embodiment of the present application in a control state;

[0048] Figure 10 It is a structural diagram of the control component of an embodiment of the present application.

[0049] Explanation of the accompanying drawings: 1. Cylinder body; 2. Piston rod; 3. Bracket; 4. Movable plate; 5. Blocking assembly; 51. Mounting frame; 511. First hole; 512. Second hole; 513. Slide groove; 514. Limiting groove; 515. Pressure inclined surface; 52. Rotating plate; 53. Blocking part; 531. Contact surface; 532. Blocking surface; 533. Buffer pad; 54. First slide bar; 55. Second slide bar; 56. Buffer spring; 57. Positioning bar; 571. Limiting bar; 572. Unlocking inclined surface; 573. Clearance hole; 58. Positioning spring; 6. Control part; 61. Slide bar; 62. Control block; 621. Extrusion inclined surface; 63. Push handle; 7. Release spring. DETAILED DESCRIPTION

[0050] The following is combined with Figure 1-10 This application is described in further detail.

[0051] An embodiment of the present application discloses a cylinder with a stroke control device.

[0052] Reference Figure 1 The cylinder includes a cylinder body 1, a piston rod 2 and a stroke control device. The piston rod 2 is slidably connected to the cylinder body 1. The piston rod 2 moves back and forth under the action of compressed gas. The stroke control device is used to achieve multi-stage control of the cylinder stroke. The specific structure and matching relationship of the cylinder body 1 and the piston rod 2 are prior art and will not be described here. It should be noted that the cylinder type in the embodiment of the present application is a double-acting cylinder. In other embodiments, it can also be any other type of linear motion cylinder, because the stroke control device is applicable to various types of linear motion cylinders.

[0053] Reference Figure 1 、 Figure 2 The stroke control device includes a bracket 3, a movable plate 4, a blocking component 5, a control member 6 and a release spring 7.

[0054] The bracket 3 is arranged along the extension and contraction direction of the piston rod 2 , and one end of the bracket 3 is fixedly connected to the cylinder body 1 .

[0055] The movable plate 4 is fixedly connected to the outer side of the end of the piston rod 2. When the piston rod 2 is not extended, the movable plate 4 is in contact with the cylinder body 1; when the piston rod 2 is extended, the movable plate 4 moves with the piston rod 2.

[0056] Three blocking assemblies 5 are arranged at equal intervals along the bracket 3. These blocking assemblies 5 cooperate with the movable plate 4 to block and position the piston rod 2 at different extension distances, thereby achieving multi-stage control of the cylinder stroke. It should be noted that the three blocking assemblies 5 in this embodiment of the present application are used to achieve cylinder stroke control at 25%, 50%, and 75%, respectively. In other embodiments, the number and spacing of blocking assemblies 5 can be adjusted according to actual needs.

[0057] The control member 6 is slidably connected to the bracket 3. After the control member 6 slides to the corresponding blocking assembly 5, it can push the blocking assembly 5 toward the piston rod 2, so that the blocking assembly 5 has a control state close to the piston rod 2 and a release state away from the piston rod 2. When the blocking assembly 5 is in the control state, it can limit the position of the movable plate 4 during the cylinder stroke; when the blocking assembly 5 is in the release state, it does not limit the movement of the movable plate 4 during the cylinder stroke.

[0058] The release spring 7 is fixedly connected between the mounting bracket 51 and the blocking assembly 5. The release spring 7 applies a force to the blocking assembly 5 to move away from the piston rod 2, so that after the control member 6 slides away, the blocking assembly 5 can switch back to the release state.

[0059] The specific structure of the stroke control device is described in detail below:

[0060] Reference Figure 3 、 Figure 4 The blocking assembly 5 includes two symmetrically arranged mounting brackets 51 and a rotating plate 52 movably connected between the two mounting brackets 51. The mounting brackets 51 are slidably connected to the bracket 3. The bracket 3 is provided with a movable hole for the mounting bracket 51 to slide toward or away from the piston rod 2. The unlocking spring is fixedly connected between the side of the mounting bracket 51 closest to the axis of the piston rod 2 and the inner wall of the movable hole.

[0061] Reference Figure 3 、 Figure 4 The end of the rotating plate 52 closest to the movable plate 4 is fixedly connected to a blocking portion 53 for blocking the movable plate 4. First slide bars 54 are fixedly connected to opposite sides of one end of the rotating plate 52, and second slide bars 55 are fixedly connected to opposite sides of the other end. The mounting frame 51 is provided with a first hole 511 for the first slide bar 54 to slide through, and a second hole 512 for the second slide bar 55 to slide through. When the first slide bar 54 slides within the first hole 511, the second slide bar 55 simultaneously slides within the second hole 512, causing the rotating plate 52 to deflect. A buffer spring 56 is fixedly connected between the inner wall of the end of the second hole 512 away from the first hole 511 and the second slide bar 55. After the blocking part 53 is acted upon by the movable plate 4, the rotating plate 52 is deflected, and the first slide bar 54 slides along the first hole 511 close to the second hole 512, and the second slide bar 55 slides along the second hole 512 away from the first hole 511. The buffer spring 56 absorbs the impact force of the movable plate 4, thereby preventing the blocking part 53 from being deformed due to long-term impact, and thus the stroke control accuracy will not be affected.

[0062] Reference Figure 4 、 Figure 5The outer surface of the blocking portion 53 is divided into a contact surface 531 and a blocking surface 532. The contact surface 531 is adjacent to the blocking surface 532. A rubber cushion 533 is fixedly connected to the contact surface 531 of the blocking portion 53. When the blocking assembly 5 is in the controlled state, when the first sliding rod 54 is located at the end of the first hole 511 away from the second hole 512, the contact surface 531 faces the movable panel 4 and contacts the movable panel 4. When the first sliding rod 54 is located at the end of the first hole 511 closer to the second hole 512, the blocking surface 532 faces the movable panel 4 and contacts the movable panel 4. In this state, the blocking portion 53 can still limit the movable panel 4. Therefore, the cushion 533 can initially cushion the impact force of the movable panel 4, reducing damage and deformation to the movable panel 4 and the blocking portion 53 caused by the collision. As the movable panel 4 moves, the blocking portion 53 deflects with the rotating plate 52, and the surface facing the movable panel 4 changes from the contact surface 531 to the blocking surface 532.

[0063] Reference Figure 6 、 Figure 7 In order to position the blocking part 53 in the compressed state so that the blocking part 53 not in the controlled state does not affect the movement of the movable plate 4, the two mounting frames 51 are slidably connected to the opposite sides with positioning bars 57. The sliding direction of the positioning bar 57 is the same as the sliding direction of the mounting frame 51, and the sliding direction of the positioning bar 57 is perpendicular to the length direction of the second hole 512.

[0064] Reference Figure 4 、 Figure 7 The mounting frame 51 is provided with a slide groove 513 for the positioning bar 57 to slide, and the slide groove 513 is connected to the second slot 512. The thickness of the positioning bar 57 is greater than the depth of the slide groove 513, and a clearance hole 573 is provided on the side of the positioning bar 57 near the bottom wall of the slide groove 513. When the second slide bar 55 is located on the side of the positioning bar 57 facing away from the first slot 511, the first slide bar 54 is located at the end of the first slot 511 near the second slot 512. At this time, if the end of the positioning bar 57 is within the second slot 512, the second slide bar 55 is positioned by the positioning bar 57. When the positioning bar 57 slides until the clearance hole 573 is directly opposite the second slot 512, the positioning bar 57 will not hinder the sliding of the second slide bar 55.

[0065] Reference Figure 7 、 Figure 8The outer side of the positioning bar 57 is fixedly connected to the limiting bar 571. The inner wall of the slide groove 513 is connected to the limiting groove 514 for the limiting bar 571 to slide. A positioning spring 58 is provided between the inner wall of the limiting groove 514 and the limiting bar 571. The positioning spring 58 applies a force to the positioning bar 57 to move away from the blocking portion 53, so that the positioning bar 57 can position the blocking portion 53 and the rotating plate 52 in a compressed state. At this time, the lower end of the positioning bar 57 protrudes relative to the mounting frame 51. Pressing the protruding portion of the positioning bar 57 relative to the mounting frame 51 overcomes the force of the positioning spring 58, causing the clearance hole 573 to align with the second hole 512, thereby releasing the positioning of the second slide bar 55.

[0066] Reference Figure 9 、 Figure 10 The control member 6 includes a slide bar 61 that is slidably connected to the bracket 3 and a control block 62 that is fixedly connected to the slide bar 61. The slide bar 61 is U-shaped, and two control blocks 62 are provided and fixedly connected to the inner sides of the two ends of the slide bar. The bracket 3 is provided with a control groove for the control block 62 to slide. The control groove is provided along the length direction of the bracket 3 and is connected to the three movable holes. A push handle 63 is fixedly connected to the middle part of the slide bar 61. The side of the control block 62 close to the blocking component 5 is provided with an extrusion slope 621, and the side of the mounting frame 51 close to the control block 62 is provided with a pressure slope 515 that cooperates with the extrusion slope 621. When the control block 62 moves close to the mounting frame 51 until the extrusion slope 621 and the pressure slope 515 are in contact, continue to push the control block 62, and the mounting frame 51 can be pushed close to the piston rod 2 under the action of the slope, so that the blocking component 5 is switched from the release state to the control state.

[0067] Reference Figure 8 、 Figure 9 One end of the positioning bar 57 extending out of the slide groove 513 is provided with an unlocking inclined surface 572 , so the control member 6 can also squeeze the positioning bar 57 to unlock the second slide rod 55 .

[0068] The implementation principle of a cylinder with a stroke control device in the embodiment of the present application is as follows:

[0069] If 50% cylinder stroke control is required, first push the control member 6 to pass through the first blocking component 5, and restore the first blocking component 5 to its initial state after the control member 6 passes, and then move the control member 6 to the second blocking component 5. Through the action of the inclined surface, the mounting bracket 51 moves close to the piston rod 2, thereby putting the blocking component 5 in a controlled state.

[0070] When the cylinder is working, the piston rod 2 moves back and forth. When the piston rod 2 is extended, the movable plate 4 first contacts the buffer pad 533, so that the blocking part 53 and the rotating plate 52 are subjected to force, the first sliding bar 54 and the second sliding bar 55 slide, and the buffer spring 56 is compressed until the movable plate 4 contacts the blocking surface 532. At this time, the blocking part 53 restricts the movable plate 4, and the movable plate 4 and the piston rod 2 cannot continue to move, thereby achieving precise control of 50% of the cylinder stroke.

[0071] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A stroke control device, characterized in that: It comprises a bracket (3) connected to the cylinder body (1), a movable plate (4) connected to the piston rod (2), at least two blocking components (5) spaced apart and arranged on the bracket (3), and a control member (6) for pushing the blocking components (5) to slide; The blocking assembly (5) comprises a mounting frame (51) slidably connected to the bracket (3), a rotating plate (52) connected to the mounting frame (51), and a blocking portion (53) connected to one end of the rotating plate (52), wherein the blocking portion (53) is used to block the movable plate (4); The control member (6) is used to push the mounting frame (51) to move closer to the piston rod (2), so that the blocking assembly (5) has a control state close to the piston rod (2) and a release state away from the piston rod (2); When the blocking assembly (5) is in a controlled state, the blocking portion (53) can limit the position of the movable plate (4) during the cylinder stroke; When the blocking assembly (5) is in a released state, the movable plate (4) will not contact the blocking portion (53) during the cylinder stroke; The end of the rotating plate (52) close to the blocking portion (53) is connected to a first slide bar (54), the mounting frame (51) is provided with a first hole (511) for the first slide bar (54) to slide, the end of the rotating plate (52) away from the blocking portion (53) is connected to a second slide bar (55), the mounting frame (51) is provided with a second hole (512) for the second slide bar (55) to slide, and a buffer spring (56) is provided between the inner wall of the end of the second hole (512) away from the first hole (511) and the second slide bar (55).

2. A stroke control device according to claim 1, characterized in that: The outer side surface of the blocking portion (53) is divided into a contact surface (531) and a blocking surface (532); When the first sliding rod (54) is located at an end of the first hole (511) away from the second hole (512), the contact surface (531) is used to contact the movable plate (4); When the first sliding rod (54) is located at one end of the first hole (511) close to the second hole (512), the blocking surface (532) is used to contact the movable plate (4).

3. A stroke control device according to claim 2, characterized in that: The blocking portion (53) is connected to a buffer pad (533) at the contact surface (531).

4. A stroke control device according to claim 1, characterized in that: The mounting frame (51) is provided with a sliding groove (513) connected to the second hole (512), a positioning strip (57) is slidably penetrated inside the sliding groove (513), the positioning strip (57) is provided with a clearance hole (573) for the second slide bar (55) to pass through, the outer side of the positioning strip (57) is connected to the limiting strip (571), the inner wall of the sliding groove (513) is connected to a limiting groove (514) for the limiting strip (571) to slide, and a positioning spring (58) is provided between the inner wall of the limiting groove (514) and the limiting strip (571); When the second slide bar (55) is located on the side of the positioning bar (57) away from the first hole (511), the first slide bar (54) is located at one end of the first hole (511) close to the second hole (512).

5. A stroke control device according to claim 4, characterized in that: The control member (6) comprises a slide bar (61) slidably connected to the bracket (3) and a control block (62) connected to the slide bar (61); an extrusion inclined surface (621) is provided on one side of the control block (62); and a pressure inclined surface (515) cooperating with the extrusion inclined surface (621) is provided on a side of the mounting frame (51) close to the control block (62).

6. A stroke control device according to claim 5, characterized in that: An unlocking inclined surface (572) is provided at one end of the positioning bar (57) extending out of the sliding groove (513).

7. A stroke control device according to claim 5, characterized in that: A release spring (7) is connected between the mounting frame (51) and the bracket (3).

8. A stroke control device according to claim 5, characterized in that: The slide bar (61) is connected to a push handle (63).

9. A cylinder, characterized in that: The invention comprises the stroke control device according to any one of claims 1 to 8.

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