High-rigidity sliding table air cylinder with high precision

Abstract

The high-precision high-rigidity sliding table air cylinder comprises a cylinder body, a sliding table is slidably connected to the outer surface of the bottom of the cylinder body, piston rods are symmetrically and slidably connected to the interior of the cylinder body, and the ends, extending out of the cylinder body, of the piston rods are rotationally connected with floating connectors; an anti-deflection assembly is arranged on the outer surface of each piston rod and comprises guide rails symmetrically and fixedly connected to the outer surfaces of the piston rods, and clamping rings are slidably connected to the outer surfaces of the piston rods in a damping mode. Relative rotation of the piston rod in the movement process is prevented, lateral component force is generated in the movement process due to the relative rotation of the piston rod, uneven pressure distribution is generated between the piston rod and the inner wall of the cylinder body due to the lateral component force, and therefore the movement precision of the piston rod is affected; lateral component force can be eliminated or reduced, so that force borne by the piston rod in the moving process is more uniform, and the precision of the sliding table air cylinder can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of slide cylinders, in particular to a high-precision and high-rigidity slide cylinder. Background Art

[0002] The slide cylinder, also known as the pneumatic slide, is a highly integrated pneumatic actuator that integrates a variety of functions such as linear guides, limit buffers, and magnetic ring position detection. It is widely used in many fields such as automation equipment, machine tools, medical equipment, and plastic machinery.

[0003] During the operation of the slide cylinder, the piston rod may be subjected to some lateral forces in addition to the thrust or pull along the axis. These lateral forces may come from factors such as the imbalance of external loads, cylinder installation errors, or uneven distribution of internal air pressure. When the lateral force reaches a certain level, it will overcome the friction and constraints between the piston rod and the cylinder body, resulting in relative rotation between the piston rod and the cylinder body.

[0004] In addition, if the installation method or working state of the slide cylinder makes the gravity direction of the piston rod not parallel to the cylinder axis, gravity will produce a component force in the direction perpendicular to the axis. This component force will cause the piston rod to have a tendency to tilt. Under certain conditions, it may cause relative rotation between the piston rod and the cylinder body, especially when the piston rod is long, heavy or the cylinder is installed vertically, the influence of gravity is more obvious;

[0005] The relative rotation between the piston rod and the cylinder body will cause uneven friction and shear force on the inner surface of the cylinder body, resulting in increased wear of the inner wall, especially at the sealing and supporting parts of the piston rod. In addition, the lateral force generated by the relative rotation between the cylinder body and the piston rod may cause the piston rod to bend and deform. Especially when subjected to large loads and impact forces, the deformation of the piston rod will be more serious, thus affecting the accuracy of the slide cylinder;

[0006] In response to this problem, we propose a high-precision and high-rigidity slide cylinder to solve the above problems. Summary of the invention

[0007] Technical issues solved

[0008] In view of this, and in view of the deficiencies in the prior art, the present invention provides a high-precision and high-rigidity slide cylinder to solve the problems raised in the above-mentioned background technology.

[0009] Technical Solution

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-precision high-rigidity slide cylinder, comprising a cylinder body, a slide is slidably connected to the outer surface of the bottom of the cylinder body, a piston rod is symmetrically slidably connected inside the cylinder body, one end of the piston rod extending outside the cylinder body is rotatably connected to a floating joint, and an anti-deflection component is provided on the outer surface of each piston rod;

[0011] The anti-deflection assembly includes a guide rail symmetrically fixedly connected to the outer surface of the piston rod, a retaining ring is connected to the outer surface of the piston rod in a damping sliding manner, the outer surface of the retaining ring is provided with grooves in a circular array with the center of the retaining ring as a reference, fixed clamps are rotatably connected inside the grooves, a retaining block is fixedly connected to the outer surface of the retaining ring away from the floating joint, a limit ring is connected to the outer surface of the piston rod in a damping sliding manner, an annular groove is provided on the outer surface of the limit ring close to the retaining ring, a fixed block is slidably connected inside the annular groove, and connecting springs are fixedly connected to both ends of the fixed block.

[0012] Preferably, the retaining ring is slidably connected to the outer surface of the piston rod, the limiting ring is slidably connected to the outer surface of the guide rail, the inner surface of the fixed clamping claw away from the retaining ring is tightly engaged with the outer surface of the floating joint, the clamping blocks are arranged in a circular array with the center of the retaining ring as a reference, and the fixed blocks are arranged in a circular array with the center of the limiting ring as a reference. A clamping groove is opened in the middle of the fixed blocks, and the clamping blocks are clamped with the fixed blocks through the clamping grooves opened on the fixed blocks.

[0013] Preferably, the wall of the annular groove is set as a rough plane, the outer surface of the fixing block is set as a rough plane, and the connecting spring is set inside the annular groove.

[0014] Preferably, it also includes an alarm component arranged inside the limiting ring;

[0015] The alarm component includes a moving block fixedly connected to the end of the connecting spring away from the fixed block, a first magnetic block is fixedly connected to the outer surface of the moving block away from the connecting spring, a first contact is fixedly installed at the center of the outer surface of the moving block away from the connecting spring, a limiting block is fixedly connected to the annular groove wall, a second magnetic block is fixedly connected to the outer surface of the limit block close to the moving block, a second contact is fixedly installed at the center of the outer surface of the limit block close to the moving block, and a warning light is fixedly installed on the outer surface of the top of the limiting ring.

[0016] Preferably, three groups of moving blocks are arranged in a circular array around the center of the limit ring, each group of moving blocks is provided with two moving blocks, the two moving blocks are respectively arranged at the ends of the same fixed block and the connecting springs are away from each other, the first magnetic block is arranged around the outside of the first contact, and three groups of limit blocks are arranged in a circular array around the center of the limit ring, each group of limit blocks is provided with two limit blocks, the two limit blocks are respectively arranged on the side of the two moving blocks away from each other, and the second magnetic block is arranged around the outside of the second contact.

[0017] Preferably, the facing surfaces of each group of first magnetic blocks and second magnetic blocks are arranged with the same magnetic poles, and the warning light is electrically connected to the three groups of second magnetic blocks.

[0018] Preferably, it also includes a cleaning component disposed on the outer surface of the piston rod;

[0019] The cleaning assembly includes a protective sleeve fixedly connected to the outer surface of the cylinder body, a spiral groove is opened inside the protective sleeve, a positioning ring is slidably connected to the outer surface of the piston rod, a cleaning brush is rotatably connected inside the positioning ring, and a cylindrical rod is fixedly connected to one side of the outer surface of the cleaning brush.

[0020] Preferably, the positioning ring, the cleaning brush and the cylindrical rod are all arranged inside the protective sleeve, the cleaning brush is arranged outside the piston rod and contacts the outer surface of the piston rod, and the end of the cylindrical rod away from the cleaning brush is slidably connected to the inside of the spiral groove.

[0021] Preferably, it also includes a buffer assembly arranged on the outer surface of the piston rod;

[0022] The buffer assembly includes a connecting ring fixedly connected to the outer surface of the piston rod, a buffer spring 1 is fixedly connected to one side of the connecting ring, and a buffer spring 2 is fixedly connected to the other side of the connecting ring. The connecting ring is arranged on the side of the positioning ring away from the cylinder body, the buffer spring 1 and the buffer spring 2 are both sleeved on the outer surface of the piston rod, and the buffer spring 2 is fixedly connected to the positioning ring at one end away from the connecting ring.

[0023] Beneficial Effects

[0024] Compared with the prior art, the present invention provides a high-precision high-rigidity slide cylinder having the following

[0025] Beneficial effects:

[0026] By setting the clamping block, the fixing block, the connecting spring, the first magnetic block and the second magnetic block, the piston rod can be kept in a horizontal state during the movement, so as to avoid the relative rotation between the piston rod and the cylinder body due to the imbalance of external force during the movement. The sealing parts (such as sealing rings, sealing gaskets, etc.) can be kept in a normal working state and are not easily subjected to additional shear force and friction force, so as to ensure the integrity of the sealing interface and effectively prevent gas leakage.

[0027] By preventing the piston rod from rotating relative to each other during the movement, the relative rotation of the piston rod will cause it to generate lateral force during the movement. This lateral force will cause uneven pressure distribution between the piston rod and the inner wall of the cylinder body, thereby affecting the movement accuracy of the piston rod. By preventing relative rotation, the lateral force can be eliminated or reduced, making the force on the piston rod more uniform during the movement, which helps to improve the accuracy of the slide cylinder.

[0028] The arrangement of the clamping block, the fixing block, the connecting spring, the first magnetic block and the second magnetic block helps the piston rod to maintain a linear motion state. Relative rotation will cause the piston rod to generate a lateral force during the motion, resulting in an increase in the coaxiality deviation between the piston rod and the cylinder body, thereby causing shaking and offset. Avoiding relative rotation can maintain the linear motion trajectory of the piston rod, reduce the offset error, and enable the piston rod to accurately reach the specified position.

[0029] Through the setting of the first contact point, the second contact point and the warning light, when a large-amplitude relative rotation occurs between the piston rod and the cylinder body and cannot be suppressed, the staff can be quickly reminded that there is a problem with the operation of the cylinder, thereby avoiding problems such as increased wear between the piston rod and the cylinder body, damage to the seal, loosening or even breaking of the connecting parts caused by the large-amplitude relative rotation;

[0030] By setting a cleaning brush, the surface of the piston rod can be cleaned when the piston rod moves linearly. Cleaning the surface of the piston rod during the movement can prevent impurities from causing wear and scratches on the seal, thereby avoiding seal failure and reducing gas leakage. In addition, dirt and impurities on the surface of the piston rod will increase the friction between the seal and other contact parts. By cleaning the surface during linear motion, the friction coefficient can be reduced, making the movement of the piston rod smoother.

[0031] By setting the buffer spring 1, the connecting ring and the buffer spring 2, the impact generated during the linear motion of the piston rod can be effectively buffered. When an impact occurs, the buffer spring 1 and the buffer spring 2 can absorb and dissipate energy through the deformation of the spring, thereby reducing the direct force of the impact on the piston rod and other connecting parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the external structure of the piston rod of the present invention;

[0034] Figure 3 It is a schematic diagram of the cross-sectional structure of the piston rod of the present invention;

[0035] Figure 4 This is an exploded view of the structure of the limit ring of the present invention;

[0036] Figure 5 For the present invention Figure 4 Schematic diagram from another perspective;

[0037] Figure 6 It is a plan view of the limiting ring of the present invention;

[0038] Figure 7 This is a schematic diagram of the internal structure of the limit ring of the present invention;

[0039] Figure 8 This is a schematic diagram of the internal structure of the protective sleeve of the present invention;

[0040] Fig. 9 It is a schematic diagram of the position relationship of the guide rail of the present invention;

[0041] Fig.10 For the present invention Fig. 9 A magnified view of the structure at center;

[0042] Fig.11 It is a schematic diagram of the cross-sectional structure of the positioning ring of the present invention.

[0043] In the figure: 11, cylinder body; 12, slide; 13, piston rod; 14, floating joint;

[0044] 21. Guide rail; 22. Snap ring; 23. Groove; 24. Fixed clamp; 25. Block; 26. Limit ring; 27. Annular groove; 28. Fixed block; 29. ​​Connecting spring;

[0045] 31. Moving block; 32. First magnetic block; 33. First contact point; 34. Limit block; 35. Second magnetic block; 36. Second contact point; 37. Warning light;

[0046] 41. Protective sleeve; 42. Spiral groove; 43. Positioning ring; 44. Cleaning brush; 45. Cylindrical rod;

[0047] 51. Connecting ring; 52. Buffer spring 1; 53. Buffer spring 2. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] Embodiments of the present invention

[0050] See also Figures 1 to 7 and Fig. 9 A high-precision and high-rigidity slide cylinder comprises a cylinder body 11, a slide 12 is slidably connected to the bottom outer surface of the cylinder body 11, a piston rod 13 is symmetrically slidably connected inside the cylinder body 11, one end of the piston rod 13 extending outside the cylinder body 11 is rotatably connected to a floating joint 14, and an anti-deflection component is provided on the outer surface of each piston rod 13;

[0051] The anti-deflection assembly includes a guide rail 21 symmetrically fixedly connected to the outer surface of the piston rod 13, a retaining ring 22 is connected to the outer surface of the piston rod 13 in a damping sliding manner, the outer surface of the retaining ring 22 is provided with grooves 23 in a circular array with the center of the retaining ring 22 as a reference, and fixed clamps 24 are rotatably connected inside the grooves 23, a retaining block 25 is fixedly connected to the outer surface of the retaining ring 22 away from the floating joint 14, a limit ring 26 is connected to the outer surface of the piston rod 13 in a damping sliding manner, and an annular groove 27 is opened on the outer surface of the limit ring 26 close to the retaining ring 22, a fixed block 28 is slidably connected inside the annular groove 27, and connecting springs 29 are fixedly connected to both ends of the fixed block 28.

[0052] Among them, the clamping ring 22 is slidably connected to the outer surface of the piston rod 13, the limiting ring 26 is slidably connected to the outer surface of the guide rail 21, the inner surface of the end of the fixed clamping claw 24 away from the clamping ring 22 is tightly buckled with the outer surface of the floating joint 14, the clamping block 25 is arranged in a circular array with the center of the clamping ring 22 as a reference, and the fixed block 28 is arranged in a circular array with the center of the limiting ring 26 as a reference. A clamping groove is opened in the middle of the fixed block 28, and the clamping block 25 is clamped with the fixed block 28 through the clamping groove opened on the fixed block 28.

[0053] The groove wall of the annular groove 27 is set as a rough surface, the outer surface of the fixing block 28 is set as a rough surface, and the connecting spring 29 is arranged inside the annular groove 27 .

[0054] A torsion spring is fixedly connected between the fixed clamping jaw 24 and the wall of the groove 23 , and the initial state of the torsion spring is a compressed state. The inner surface of the fixed clamping jaw 24 and the outer surface of the floating joint 14 are both set to be rough surfaces.

[0055] Further embodiments

[0056] See also Figures 4 to 7 , the high-precision and high-rigidity slide cylinder also includes an alarm component arranged inside the limit ring 26;

[0057] The alarm component includes a moving block 31 fixedly connected to the end of the connecting spring 29 away from the fixed block 28, a first magnetic block 32 is fixedly connected to the outer surface of the moving block 31 away from the connecting spring 29, a first contact 33 is fixedly installed at the center of the outer surface of the moving block 31 away from the connecting spring 29, a limiting block 34 is fixedly connected to the groove wall of the annular groove 27, a second magnetic block 35 is fixedly connected to the outer surface of the limiting block 34 close to the moving block 31, a second contact 36 is fixedly installed at the center of the outer surface of the limiting block 34 close to the moving block 31, and a warning light 37 is fixedly installed on the top outer surface of the limiting ring 26.

[0058] Among them, three groups of moving blocks 31 are arranged in a circular array around the center of the limit ring 26, and each group of moving blocks 31 is provided with two, and the two moving blocks 31 are respectively arranged at the ends of the same fixed block 28 that are connected to the spring 29 away from each other. The first magnetic block 32 is arranged around the outside of the first contact 33, and three groups of limit blocks 34 are arranged in a circular array around the center of the limit ring 26. Each group of limit blocks 34 is provided with two, and the two limit blocks 34 are respectively arranged on the side of the two moving blocks 31 away from each other, and the second magnetic block 35 is arranged around the outside of the second contact 36.

[0059] The opposite surfaces of each set of first magnetic blocks 32 and second magnetic blocks 35 are arranged with the same magnetic poles, and the warning light 37 is electrically connected to the three sets of second magnetic blocks 35 .

[0060] In the initial state, both ends of the fixed block 28 are in a balanced state due to the magnetic repulsion between the two groups of first magnetic blocks 32 and the second magnetic blocks 35, and the two connecting springs 29 arranged between the two groups of first magnetic blocks 32 and the second magnetic blocks 35 are in a compressed state.

[0061] The first contact 33 and the second contact 36 are in contact and can be electrically connected to turn on the warning light 37 .

[0062] Further Embodiments

[0063] See also Figure 1 , Figure 2 and Figures 8 to 11 , the high-precision and high-rigidity slide cylinder also includes a cleaning component arranged on the outer surface of the piston rod 13;

[0064] The cleaning assembly includes a protective sleeve 41 fixedly connected to the outer surface of the cylinder body 11, a spiral groove 42 is opened inside the protective sleeve 41, a positioning ring 43 is slidably connected to the outer surface of the piston rod 13, a cleaning brush 44 is rotatably connected inside the positioning ring 43, and a cylindrical rod 45 is fixedly connected to one side of the outer surface of the cleaning brush 44.

[0065] Among them, the positioning ring 43, the cleaning brush 44 and the cylindrical rod 45 are all arranged inside the protective sleeve 41, the cleaning brush 44 is arranged outside the piston rod 13 and contacts the outer surface of the piston rod 13, and the end of the cylindrical rod 45 away from the cleaning brush 44 is slidably connected to the inside of the spiral groove 42.

[0066] Further Embodiments

[0067] See also Figure 2 and Figure 3 , the high-precision and high-rigidity slide cylinder also includes a buffer component arranged on the outer surface of the piston rod 13;

[0068] The buffer assembly includes a connecting ring 51 fixedly connected to the outer surface of the piston rod 13, a buffer spring 1 52 is fixedly connected to one side of the connecting ring 51, and a buffer spring 2 53 is fixedly connected to the other side of the connecting ring 51. The connecting ring 51 is arranged on the side of the positioning ring 43 away from the cylinder body 11, and the buffer spring 1 52 and the buffer spring 2 53 are both sleeved on the outer surface of the piston rod 13. The buffer spring 2 53 is fixedly connected to the positioning ring 43 at one end away from the connecting ring 51.

[0069] The working process and principle of the overall content of the above embodiment are as follows:

[0070] Preparation:

[0071] The slide 12 is fixedly installed on the surface of the mechanical equipment by bolts, and then the floating joint 14 is fixedly connected to the surface of the object to be reciprocated. When the piston rod 13 reciprocates inside the cylinder 11 under the action of the air pressure difference, it will drive the object connected to the floating joint 14 to reciprocate synchronously;

[0072] Anti-deflection of the piston rod 13:

[0073] During the actual movement of the piston rod 13, the object fixedly connected to the floating joint 14, the piston rod 13 and the cylinder body 11 should be in the same relatively horizontal plane. However, during actual use, the piston rod 13 and the cylinder body 11 may have uneven friction between the surfaces of the cylinder body 11 and the piston rod 13 due to insufficient or uneven lubrication, resulting in relative rotation between the two. In addition, during the movement of the piston rod 13, the torque applied to the piston rod 13 may be unbalanced, which is caused by the unbalanced external load of the piston rod 13. The above reasons will also cause relative rotation between the cylinder body 11 and the piston rod 13.

[0074] The relative rotation between the cylinder body 11 and the piston rod 13 will cause the inner surface of the cylinder body 11 to be subjected to uneven friction and shear force, resulting in aggravated wear of the inner wall, especially at the sealing part and the supporting part of the piston rod 13, where the wear will be more obvious. In addition, the lateral force generated by the relative rotation between the cylinder body 11 and the piston rod 13 may cause the piston rod 13 to bend and deform, especially when subjected to large loads and impact forces, the deformation of the piston rod 13 will be more serious, thereby affecting the accuracy of the slide cylinder;

[0075] When relative rotation occurs between the piston rod 13 and the cylinder body 11, since in the initial state, the object to be moved, the piston rod 13, the floating joint 14 and the cylinder body 11 are in the same horizontal plane, when relative rotation occurs between the cylinder body 11 and the piston rod 13, relative rotation also occurs between the piston rod 13 and the floating joint 14;

[0076] When the piston rod 13 rotates relative to the floating joint 14, since the outer surface of the piston rod 13 is symmetrically fixedly connected with the guide rail 21, and the limit ring 26 is damped and slidably connected to the surface of the piston rod 13 and the guide rail 21, when the piston rod 13 rotates relatively, the limit ring 26 arranged on the outer surface of the piston rod 13 will rotate synchronously. In addition, since the clamping ring 22 is slidably connected to the surface of the piston rod 13, and the groove 23 opened on the outer surface of the clamping block 25 is rotatably connected with the fixed clamping claw 24 inside, a torsion spring is fixedly connected between the fixed clamping claw 24 and the groove wall of the groove 23, and the initial state of the torsion spring is a compressed state, therefore, when the staff rotates the fixed clamping claw 24 so that the fixed clamping claw 24 contacts the surface of the floating joint 14, the positions of the clamping ring 22 and the floating joint 14 are relatively fixed by clamping the fixed clamping claw 24 and the floating joint 14;

[0077] It should be noted that, in the above process, when the fixed jaw 24 rotates with the rotation connection point between the fixed jaw 24 and the snap ring 22 as the fulcrum, the torsion spring originally in the compressed state will gradually stretch, forcing the fixed jaw 24 to be in close contact with the outer surface of the floating joint 14, thereby fixing the position of the floating joint 14. In addition, the inner surface of the fixed jaw 24 and the outer surface of the floating joint 14 are both set to be rough planes. Therefore, in actual use, the clamping force applied by the fixed jaw 24 on the surface of the floating joint 14 and the friction between the contact surface of the fixed jaw 24 and the floating joint 14 prevent the fixed jaw 24 and the floating joint 14 from relative movement, thereby preventing the floating joint 14 and the snap ring 22 from relative movement.

[0078] When the position of the limiting ring 26 rotates relative to the floating joint 14, the limiting ring 26 arranged on the outer surface thereof will rotate synchronously. Since the outer surface of the clamping ring 22 is fixedly connected with the clamping block 25, and the fixing block 28 is provided with a clamping groove engaged with the clamping block 25, the rotation of the limiting ring 26 relative to the clamping ring 22 will cause the fixing block 28 to move inside the annular groove 27.

[0079] It should be noted that, in the above process, since both ends of the fixed block 28 are fixedly connected with the connecting spring 29, the end of the connecting spring 29 away from the fixed block 28 is fixedly connected with the moving block 31, the moving block 31 is fixedly connected with the first magnetic block 32, the annular groove 27 provided on the limiting ring 26 is fixedly connected with the limiting block 34, the limiting block 34 is fixedly connected with the second magnetic block 35, and the opposite surfaces of the first magnetic block 32 and the second magnetic block 35 are set to the same magnetic poles, therefore, in the initial state, both ends of the fixed block 28 are in a balanced state due to the magnetic repulsion between the two groups of the first magnetic block 32 and the second magnetic block 35, and the two connecting springs 29 arranged between the two groups of the first magnetic block 32 and the second magnetic block 35 are in a compressed state;

[0080] Since the positions of the clamping block 25 and the clamping ring 22 are relatively fixed, the position of the fixed block 28 in the clamping state with the clamping block 25 will also be relatively fixed. When the limiting ring 26 rotates relatively, the distance between the two groups of first magnetic blocks 32 and the second magnetic blocks 35 set at both ends of each fixed block 28 will change. Specifically, one of the two groups of first magnetic blocks 32 and second magnetic blocks 35 tends to approach each other, and the other group tends to move away from each other. However, since the two connecting springs 29 are in an extreme compression state, when the position of the fixed block 28 remains unchanged, the deflection of the limiting ring 26 will drive the position of the limiting block 34 fixedly connected thereto to change, and then there is a tendency for the limiting block 34 to drive the second magnetic block 35 fixedly connected to its outer surface to move toward the first magnetic block 32.

[0081] In the above process, as the distance between the first magnetic block 32 and the second magnetic block 35 is shortened, according to the magnetic field form of Coulomb's law, the magnitude of the magnetic force between the two magnetic poles is proportional to the product of the magnetic pole strengths and inversely proportional to the square of the distance between the magnetic poles. When the distance between the two relative magnetic poles is shortened, the magnetic force will increase rapidly under the condition that the magnetic pole strength remains unchanged, that is, the magnetic force between the first magnetic block 32 and the second magnetic block 35 will increase. However, due to the incompressibility of the connecting spring 29 and the fixed position of the fixed block 28, the magnetic force between the first magnetic block 32 and the second magnetic block 35 will act on the fixed block 28 in the opposite direction, and then be fed back to the limit ring 26 through the fixed block 28, thereby inhibiting the rotation of the limit ring 26 in the opposite direction. In addition, the limit ring 26 slides on the piston rod 13 through the guide rail 21, and the rotation tendency of the limit ring 26 is inhibited, thereby inhibiting the deflection between the piston rod 13 and the floating joint 14, thereby preventing the rotation between the piston rod 13 and the cylinder body 11;

[0082] In addition, since the groove wall of the annular groove 27 is set as a rough surface and the outer surface of the fixed block 28 is set as a rough surface, the fixed block 28 needs to overcome the friction between the annular groove 27 and the fixed block 28 when it moves in the annular groove 27. The friction will also act on the moving block 31 in the opposite direction through the connecting spring 29, thereby preventing the moving block 31 from moving inside the annular groove 27.

[0083] By setting the clamping block 25, the fixing block 28, the connecting spring 29, the first magnetic block 32 and the second magnetic block 35, the piston rod 13 can be kept in a horizontal state during the movement, so as to avoid the relative rotation between the piston rod 13 and the cylinder body 11 due to the imbalance of external force during the movement. The sealing parts (such as sealing rings, sealing gaskets, etc.) can be kept in a normal working state and are not easily subjected to additional shear force and friction force, so as to ensure the integrity of the sealing interface and effectively prevent gas leakage.

[0084] In addition, the arrangement of the clamping block 25, the fixing block 28, the connecting spring 29, the first magnetic block 32 and the second magnetic block 35 helps the piston rod 13 maintain a linear motion state. Relative rotation will cause the piston rod 13 to generate a lateral force during the movement, resulting in an increase in the coaxiality deviation between the piston rod 13 and the cylinder body 11, thereby causing shaking and offset. Avoiding relative rotation can maintain the linear motion trajectory of the piston rod 13, reduce offset errors, and enable the piston rod 13 to accurately reach the specified position.

[0085] Alarm after relative rotation of piston rod 13:

[0086] As the piston rod 13 is continuously used, the relative rotation between the piston rod 13 and the cylinder body 11 becomes increasingly difficult to suppress. At this time, the relative rotation angle between the piston rod 13 and the floating joint 14 becomes increasingly larger, and the magnetic field repulsion between the first magnetic block 32 and the second magnetic block 35 gradually becomes smaller than the deflection force of the piston rod 13 driving the limit ring 26 to rotate. At this time, one of the groups of limit blocks 34 fixedly connected to the inside of the limit ring 26 will move toward the position of the moving block 31, thereby causing the first contact 33 and the second contact 36 respectively arranged on the moving block 31 and the limit block 34 to contact each other.

[0087] The first contact 33 and the second contact 36 can be electrically connected to control the warning light 37 to turn on, thereby reminding the staff that a serious deviation has occurred between the piston rod 13 and the cylinder body 11;

[0088] By setting the first contact 33, the second contact 36 and the warning light 37, when a large relative rotation occurs between the piston rod 13 and the cylinder body 11 and cannot be suppressed, the staff can be quickly reminded that there is a problem with the operation of the cylinder, thereby avoiding the large relative rotation that leads to increased wear between the piston rod 13 and the cylinder body 11, damage to the seals, loosening or even breakage of the connecting parts, and other problems.

[0089] Buffering and cleaning of the piston rod 13 during operation:

[0090] During the reciprocating motion of the piston rod 13 inside the cylinder body 11, the connecting ring 51 fixedly connected to the outer surface of the piston rod 13 will move along with the movement of the piston rod 13. When the piston rod 13 moves in a direction away from the cylinder body 11, the connecting ring 51 will move synchronously. Since a buffer spring 2 53 is fixedly connected to one side of the connecting ring 51, and the end of the buffer spring 2 53 away from the connecting ring 51 is fixedly connected to the positioning ring 43, the movement of the connecting ring 51 will stretch the buffer spring 2 53. When the buffer spring 2 53 is stretched to the maximum limit, the positioning ring 43 at the other end of the buffer spring 2 53 will be pulled by the buffer spring 2 53 and tend to move.

[0091] In the above process, since the protective sleeve 41 is fixedly connected to the cylinder body 11, the positions of the protective sleeve 41 and the cylinder body 11 are relatively fixed, and the buffer spring 53 pulls the positioning ring 43 to move horizontally in the protective sleeve 41 in a direction away from the cylinder body 11. Since the cleaning brush 44 is rotatably connected to the inside of the positioning ring 43, the movement of the positioning ring 43 will drive the cleaning brush 44 to move synchronously.

[0092] Since the outer surface of the cleaning brush 44 is fixedly connected with a cylindrical rod 45, and the cylindrical rod 45 is slidably connected to the spiral groove 42 provided in the protective sleeve 41, the horizontal movement of the cleaning brush 44 will be simultaneously affected by the cylindrical rod 45 and the spiral groove 42. When the cleaning brush 44 moves horizontally, due to the effect of the spiral groove 42, the contact point between the cylindrical rod 45 and the spiral groove 42 will generate a vertical velocity component, thereby forcing the cylindrical rod 45 to drive the cleaning brush 44 to rotate inside the positioning ring 43;

[0093] By setting the cleaning brush 44, the surface of the piston rod 13 can be cleaned when the piston rod 13 moves linearly. Cleaning the surface of the piston rod 13 during the movement can prevent impurities from causing wear and scratches on the seal, thereby avoiding seal failure and reducing gas leakage. In addition, dirt and impurities on the surface of the piston rod 13 will increase the friction between the seal and other contact parts. By cleaning the surface during linear motion, the friction coefficient can be reduced, making the movement of the piston rod 13 smoother.

[0094] When the piston rod 13 moves in the reverse direction according to the above process, that is, moves in the direction close to the cylinder body 11, as the piston rod 13 moves, the connecting ring 51 fixed on the surface of the piston rod 13 will move in the direction close to the cylinder body 11. During this process, the distance between the connecting ring 51 and the protective sleeve 41 will gradually shorten, and the buffer spring 2 53 arranged therebetween will gradually change from a stretched state to a contracted state. As the buffer spring 2 53 continues to contract, the buffer spring 2 53 cannot be further compressed after contracting to the maximum limit. Therefore, the extrusion force exerted on the buffer spring 2 53 will act in the reverse direction on the positioning ring 43 to which it is fixedly connected, pushing the positioning ring 43 to move in the protective sleeve 41 in the direction close to the cylinder body 11, thereby prompting the cleaning brush 44 to rotate in the reverse direction inside the positioning ring 43 again to further clean the surface of the piston rod 13. The above process is repeated with the linear motion of the piston rod 13.

[0095] In the above process, the arrangement of the buffer spring 1 52, the connecting ring 51 and the buffer spring 2 53 can effectively buffer the impact generated during the linear motion of the piston rod 13. When an impact occurs, the buffer spring 1 52 and the buffer spring 2 53 can absorb and dissipate energy through the deformation of the spring, thereby reducing the direct force of the impact on the piston rod 13 and other connecting parts.

[0096] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0097] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision, high-rigidity slide cylinder, comprising a cylinder body (11), a slide (12) is slidably connected to the bottom outer surface of the cylinder body (11), a piston rod (13) is symmetrically slidably connected inside the cylinder body (11), and one end of the piston rod (13) extending outside the cylinder body (11) is rotatably connected to a floating joint (14), characterized in that: The outer surface of each piston rod (13) is provided with an anti-deflection component; The anti-deflection assembly comprises a guide rail (21) symmetrically fixedly connected to the outer surface of the piston rod (13); the outer surface of the piston rod (13) is connected to a retaining ring (22) in a damping sliding manner; the outer surface of the retaining ring (22) is provided with grooves (23) in a circumferential array with the center of the retaining ring (22) as a reference; fixed clamping claws (24) are rotatably connected inside the grooves (23); a clamping block (25) is fixedly connected to the outer surface of the retaining ring (22) away from the floating joint (14); the outer surface of the piston rod (13) is connected to a limit ring (26) in a damping sliding manner; the outer surface of the limit ring (26) is provided with an annular groove (27) on the side close to the retaining ring (22); a fixed block (28) is slidably connected inside the annular groove (27); and connecting springs (29) are fixedly connected to both ends of the fixed block (28).

2. A high-precision and high-rigidity slide cylinder according to claim 1, characterized in that: The clamping ring (22) is slidably connected to the outer surface of the piston rod (13), the limiting ring (26) is slidably connected to the outer surface of the guide rail (21), the inner surface of one end of the fixed clamping claw (24) away from the clamping ring (22) is tightly buckled with the outer surface of the floating joint (14), the clamping block (25) is arranged in a circular array with the center of the clamping ring (22) as a reference, and the fixed block (28) is arranged in a circular array with the center of the limiting ring (26) as a reference. The fixed block (28) is provided with a clamping groove in the middle, and the clamping block (25) is clamped with the fixed block (28) through the clamping groove provided on the fixed block (28).

3. A high-precision and high-rigidity slide cylinder according to claim 1, characterized in that: The groove wall of the annular groove (27) is set as a rough plane, the outer surface of the fixing block (28) is set as a rough plane, and the connecting spring (29) is arranged inside the annular groove (27).

4. The high-precision and high-rigidity slide cylinder according to claim 1, characterized in that: It also includes an alarm component arranged inside the limiting ring (26); The alarm component comprises a moving block (31) fixedly connected to an end of a connecting spring (29) away from a fixed block (28); a first magnetic block (32) is fixedly connected to an outer surface of the moving block (31) away from the connecting spring (29); a first contact (33) is fixedly installed at the center of the outer surface of the moving block (31) away from the connecting spring (29); a limiting block (34) is fixedly connected to the groove wall of the annular groove (27); a second magnetic block (35) is fixedly connected to an outer surface of the limiting block (34) close to the moving block (31); a second contact (36) is fixedly installed at the center of the outer surface of the limiting block (34) close to the moving block (31); and a warning light (37) is fixedly installed on the top outer surface of the limiting ring (26).

5. A high-precision and high-rigidity slide cylinder according to claim 4, characterized in that: The moving blocks (31) are arranged in three groups in a circular array around the center of the limiting ring (26), each group of moving blocks (31) is provided with two moving blocks (31), and the two moving blocks (31) are respectively arranged at the ends of the same fixed block (28) connected to the spring (29) away from each other. The first magnetic block (32) is arranged outside the first contact (33). The limiting blocks (34) are arranged in three groups in a circular array around the center of the limiting ring (26), each group of limiting blocks (34) is provided with two moving blocks (34), and the two limiting blocks (34) are respectively arranged on the sides of the two moving blocks (31) away from each other. The second magnetic block (35) is arranged outside the second contact (36).

6. A high-precision and high-rigidity slide cylinder according to claim 5, characterized in that: The facing surfaces of each group of first magnetic blocks (32) and second magnetic blocks (35) are arranged with the same magnetic poles, and the warning light (37) is electrically connected to the three groups of second magnetic blocks (35).

7. The high-precision and high-rigidity slide cylinder according to claim 1, characterized in that: Also included is a cleaning component arranged on the outer surface of the piston rod (13); The cleaning assembly comprises a protective sleeve (41) fixedly connected to the outer surface of the cylinder body (11), a spiral groove (42) is provided inside the protective sleeve (41), a positioning ring (43) is slidably connected to the outer surface of the piston rod (13), a cleaning brush (44) is rotatably connected inside the positioning ring (43), and a cylindrical rod (45) is fixedly connected to one side of the outer surface of the cleaning brush (44).

8. The high-precision and high-rigidity slide cylinder according to claim 7, characterized in that: The positioning ring (43), the cleaning brush (44) and the cylindrical rod (45) are all arranged inside the protective sleeve (41); the cleaning brush (44) is arranged outside the piston rod (13) and contacts the outer surface of the piston rod (13); and the end of the cylindrical rod (45) away from the cleaning brush (44) is slidably connected to the inside of the spiral groove (42).

9. The high-precision and high-rigidity slide cylinder according to claim 7, characterized in that: It also includes a buffer assembly arranged on the outer surface of the piston rod (13); The buffer assembly comprises a connecting ring (51) fixedly connected to the outer surface of the piston rod (13); a buffer spring 1 (52) is fixedly connected to one side of the connecting ring (51); a buffer spring 2 (53) is fixedly connected to the other side of the connecting ring (51); the connecting ring (51) is arranged on the side of the positioning ring (43) away from the cylinder body (11); the buffer spring 1 (52) and the buffer spring 2 (53) are both sleeved on the outer surface of the piston rod (13); and the buffer spring 2 (53) is fixedly connected to the positioning ring (43) at one end away from the connecting ring (51).

Images