Anti-deflection air cylinder

Abstract

The anti-deflection air cylinder comprises a cylinder body, a piston, a piston rod and a sleeve seat, the cylinder body is provided with a containing cavity with an opening in one end, the piston is arranged in the containing cavity, one end of the piston rod is fixedly connected with the piston, the piston rod extends out of the cylinder body from the opening of the containing cavity, and a limiting groove extending in the axial direction of the piston rod is formed in the outer wall of the piston rod; a sealing ring is fixed in the open end of the cylinder body, the piston rod extends out of a ring opening of the sealing ring, a sealing block matched with the limiting groove is arranged on the inner wall of the ring opening of the sealing ring and clamped into the limiting groove, and the sleeve seat is fixed to the outer wall of the open end of the cylinder body and provided with a sleeve hole matched with the diameter of the piston rod. The piston rod penetrates out of the sleeve seat from the sleeve hole, the outer wall of the piston rod is attached to the inner wall of the sleeve hole, a hard clamping block matched with the limiting groove is fixed to the position, in the sleeve hole, of the sleeve seat, the hard clamping block is clamped into the limiting groove, the piston rod can stably move and accurately linearly move, and installation in a narrow space is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air cylinders, and more particularly to an anti-deflection air cylinder. BACKGROUND

[0002] When the air cylinder is under load, external force can cause the piston rod of the air cylinder to deflect. In the related art, in order to make the piston rod move more stably and in a precise straight line, a guide structure is usually added to guide the piston rod of the air cylinder. The guide structure includes a bearing plate and two guide shafts fixed on the bearing plate. The outer walls of the two guide shafts are slidably sleeved with linear shaft sleeves. The end of the piston rod of the air cylinder is connected and fixed to the bearing plate, and the two guide shafts are arranged in parallel with the piston rod of the air cylinder. The linear shaft sleeves are fixed to the air cylinder mounting seat. The guide shafts are limited to be straight up and straight down by the linear shaft sleeves, so that the piston rod of the air cylinder moves in a straight line and is not easy to rotate and swing, which is beneficial to the positioning of the load when the air cylinder is under load.

[0003] The guide shafts and linear shaft sleeves arranged outside the air cylinder make the overall volume of the air cylinder assembly large, which is not conducive to installation in a narrow space. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the problem that the guide shafts and linear shaft sleeves arranged outside the air cylinder make the overall volume of the air cylinder assembly large, which is not conducive to installation in a narrow space, the present application provides an anti-deflection air cylinder.

[0005] An anti-deflection air cylinder includes a cylinder body, a piston, a piston rod, and a sleeve seat. The cylinder body is provided with an accommodating cavity with an open end. The piston is arranged in the accommodating cavity. One end of the piston rod is connected and fixed to the piston, and the piston rod extends out of the cylinder body from the opening of the accommodating cavity. The outer wall of the piston rod is provided with a limiting groove extending in the axial direction thereof. The inner wall of the opening end of the cylinder body is fixedly provided with a sealing ring. The piston rod extends out of the ring opening of the sealing ring, and the inner wall of the ring opening of the sealing ring is provided with a sealing block matched with the limiting groove. The sealing block is clamped into the limiting groove. The sleeve seat is fixed to the outer wall of the opening end of the cylinder body, and the sleeve seat is provided with a sleeve hole matched with the diameter of the piston rod. The piston rod passes through the sleeve hole of the sleeve seat and is attached to the inner wall of the sleeve hole. Hard clamping blocks matched with the limiting groove are fixed in the sleeve hole of the sleeve seat. The hard clamping blocks are clamped into the limiting groove. The two ends of the cylinder body are provided with air holes communicating with the accommodating cavity.

[0006] Preferably, the limiting groove is arranged in a V-shaped groove, and the cross sections of the sealing block and the hard clamping block correspondingly form a V shape.

[0007] Preferably, the hard clamping block and the sleeve seat are fixed by bolt locking.

[0008] Preferably, the sleeve seat comprises a fixed block and a sleeve, the fixed block is provided with a slot penetrating through its thickness, the profile and size of the slot match the profile and size of the open end of the cylinder body, the fixed block is sleeved into the open end of the cylinder body through the slot and is fixedly connected with the outer wall of the cylinder body, a circular accommodating groove is concavely arranged on the top surface of the fixed block, the inner diameter of the circular accommodating groove matches the outer diameter of the sleeve, and the slot is within the diameter range of the circular accommodating groove, one end of the sleeve penetrates into the circular accommodating groove, the sleeve hole is the inner hole of the sleeve, the hard clamping block is fixed on the sleeve, the outer wall of the sleeve is provided with a connecting ring block, the connecting ring block is fixedly connected with the fixed block, and a plurality of through holes penetrating through the thickness of the fixed block are arranged on the top surface of the fixed block.

[0009] Preferably, the sleeve is provided with a positioning groove on the inner wall of the sleeve hole, and the hard clamping block is provided with a positioning part matching the positioning groove, the positioning part is clamped into the positioning groove.

[0010] Preferably, the connecting ring block is provided with a plurality of arc-shaped grooves penetrating through its thickness, the plurality of arc-shaped grooves are uniformly arranged around the center of the sleeve hole, and the arc-shaped grooves extend with the center of the sleeve hole as the center, the top surface of the fixed block is provided with a plurality of first threaded holes, the bottom surface of the connecting ring block abuts against the top surface of the fixed block, the number of the arc-shaped grooves is the same as the number of the first threaded holes, and the plurality of arc-shaped grooves and the plurality of first threaded holes are one-to-one aligned, and the connecting ring block and the fixed block are fixedly connected by screwing bolts through the arc-shaped grooves into the first threaded holes.

[0011] Preferably, the inner wall of the open end of the cylinder body is provided with a support ring, the bottom surface of the sealing ring abuts against the top surface of the support ring to be supported, and the bottom end surface of the sleeve abuts against the sealing ring.

[0012] The beneficial technical effects of the present application are as follows: air is introduced or discharged through the air holes arranged at both ends of the cylinder body to drive the piston to reciprocate in the cylinder body to drive the piston rod to stretch and retract, the sealing ring is sealed to prevent air leakage and ensure accurate air pressure, the hard clamping block is limited and matched with the limiting groove arranged on the piston rod to limit the rotation of the piston rod, the sleeve hole limits the swing of the piston rod, so that the piston rod moves stably and presents accurate linear motion, the hard clamping block is matched and guided with the piston rod, and the intersection is arranged externally by matching the guide shaft with the linear shaft sleeve, which makes the overall volume of the air cylinder smaller and is conducive to installation in a narrow space. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structure diagram of a deflection prevention air cylinder.

[0014] Figure 2A sectional view of a deflection-preventing cylinder according to an embodiment.

[0015] Figure 3 A schematic view of a connection structure of a piston rod, a sealing ring and a hard clamping block according to an embodiment.

[0016] Figure 4 A schematic view of a sleeve seat according to an embodiment.

[0017] Figure 5 A schematic view of a fixing block according to an embodiment.

[0018] Reference signs: 1, cylinder body; 11, accommodating cavity; 12, air hole; 13, support ring; 2, piston; 3, piston rod; 31, limiting groove; 32, bearing plate; 4, sleeve seat; 41, sleeve hole; 42, fixing block; 421, slotted hole; 422, circular accommodating groove; 423, first threaded hole; 424, through hole; 43, sleeve; 431, positioning groove; 44, connecting ring block; 441, arc-shaped groove; 5, sealing ring; 51, sealing block; 6, hard clamping block; 61, positioning part; 62, second threaded hole. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0020] Reference Figure 1 , Figure 2 and Figure 3The utility model provides an anti-deflection cylinder, including cylinder 1, piston 2, piston rod 3, sleeve seat 4, cylinder 1 is provided with the containing cavity 11 of one end opening, piston 2 is arranged in the containing cavity 11, one end of piston rod 3 is connected with piston 2 fixedly, and piston rod 3 stretches out cylinder 1 from the opening of containing cavity 11, the outer wall of piston rod 3 is equipped with the limiting recess 31 along its axial direction, the opening end of cylinder 1 is fixed with sealing ring 5, and piston rod 3 stretches out from the ring mouth of sealing ring 5, the inner wall of the ring mouth of sealing ring 5 is provided with the sealing block 51 matched with limiting recess 31, sealing block 51 is clamped into limiting recess 31, and the containing cavity 11 of cylinder 1 is sealed through sealing ring 5, both ends of cylinder 1 are provided with the cylinder communicating containing cavity 11, and the reciprocating motion of piston 2 in cylinder 1 is realized through the air intake or air exhaust of two cylinders, sleeve seat 4 is fixed to the outer wall of the opening end of cylinder 1, sleeve seat 4 is provided with the sleeve hole 41 matched with the diameter of piston rod 3, piston rod 3 passes out the outer wall of sleeve seat 4 from sleeve hole 41, and piston rod 3 is limited through sleeve hole 41 so that piston rod 3 is not easy to be forced to swing left and right, sleeve seat 4 is fixed with the hard clamping block 6 matched with limiting recess 31 in sleeve hole 41, and the hard clamping block 6 is clamped into limiting recess 31, and the hard clamping block 6 is limited with limiting recess 31 so that piston rod 3 is not easy to rotate, thereby making the stable motion of piston rod 3 and the accurate linear motion, the hard clamping block 6 is matched with the guide setting of piston rod 3, and is intersected with the exposed setting of the guide shaft and linear shaft sleeve cooperation, which makes the overall volume of the cylinder smaller, and is favorable for installation in narrow space.

[0021] Referring to Figure 1 And Figure 2 Further, the top end of piston rod 3 is provided with a bearing plate 32 for receiving an article, and the movement of piston rod 3 realizes the lifting of the article, and due to the stable motion and accurate linear motion of piston rod 3, the article is accurately positioned after moving.

[0022] Referring to Figure 3 Further, the limiting recess 31 is provided in a V-shaped groove, and the cross sections of the sealing block 51 and the hard clamping block 6 correspondingly form a V shape, so that the hard clamping block 6 and the piston rod 3 have a wider contact surface perpendicular to the axial direction of the piston rod 3, and the limiting effect of the rotation of the piston rod 3 is better.

[0023] Referring to Figure 4 And Figure 5, further, the sleeve 4 includes a fixed block 42, sleeve 43, the fixed block 42 is provided with a slot 421 through its own thickness, the profile and size of the slot 421 match the profile and size of the open end of the cylinder body 1, the fixed block 42 is sleeved into the open end of the cylinder body 1 through the slot and is connected and fixed with the outer wall of the cylinder body 1, the connection mode can be welding or locking by bolts, the embodiment adopts welding, the top surface of the fixed block 42 is concavely provided with a circular accommodating groove 422, the inner diameter of the circular accommodating groove 422 matches the outer diameter of the sleeve 43, the slot 421 is within the diameter range of the circular accommodating groove 422 and its size is smaller than the hole diameter of the circular accommodating groove 422, one end of the sleeve 43 penetrates into the circular accommodating groove 422 and abuts against the fixed block 42, the length of the sleeve 43 extending into the circular accommodating groove 422 is positioned, the sleeve hole 41 is the inner diameter of the sleeve 43, the hard clamping block 6 is fixed on the sleeve 43, the outer wall of the sleeve 43 is provided with a connecting ring block 44, the connecting ring block 44 is provided with a plurality of arc-shaped grooves 441 through its own thickness, the plurality of arc-shaped grooves 441 are uniformly arranged around the center of the sleeve hole 41 and the arc-shaped grooves 441 extend with the center of the sleeve hole 41 as the center, the top surface of the fixed block 42 is provided with a plurality of first threaded holes 423, the bottom surface of the connecting block abuts against the top surface of the fixed block 42, the number of the arc-shaped grooves 441 is the same as the number of the first threaded holes 423, and the arc-shaped grooves 441 are one-to-one aligned with the plurality of first threaded holes 423, the connecting ring block 44 and the fixed block 42 are fixed by the bolts passing through the arc-shaped grooves 441 and being screwed into the first threaded holes 423, so as to realize the connection and fixation of the sleeve 43 and the fixed block 42, the connecting ring block 44 and the sleeve 43 are integrally arranged, and the sleeve 43 is rotated by arranging the arc-shaped grooves 441, so as to facilitate the alignment of the hard clamping block 6 with the position of the limiting groove 31 during installation.

[0024] Referring to Figure 1 and Figure 4 , further, the top surface of the fixed block 42 is provided with a plurality of through holes 424 through its own thickness, the fixed block 42 and the external mounting seat are fixed by bolt locking through the through holes 424, so as to facilitate the installation of the cylinder.

[0025] Referring to Figure 3 and Figure 4 , further, the sleeve 43 is provided with a positioning groove 431 on the inner wall of the sleeve hole 41, the hard clamping block 6 is provided with a positioning portion 61 matching the positioning groove 431, the positioning portion 61 is clamped into the positioning groove 431, and the outer wall of the sleeve 43 is provided with a mounting hole penetrating into the positioning groove 431, the positioning portion 61 of the hard clamping block 6 is provided with a second threaded hole 62, when the positioning portion 61 is clamped into the positioning groove 431, the second threaded hole 62 on the positioning portion 61 is aligned with the mounting hole, the hard clamping block 6 and the sleeve 43 are fixed by screwing the bolt inserted into the mounting hole with the second threaded hole 62 of the positioning portion 61, and the hard clamping block 6 is accurately installed in position by the cooperation of the positioning groove 431 and the positioning portion 61, so as to facilitate the accurate alignment of the hard clamping block 6 with the limiting groove 31.

[0026] With reference to Figure 2 And further, referring to Fig. 4, the inner wall of the open end of the cylinder 1 is provided with a support ring 13 (not shown in the figure), the bottom surface of the sealing ring 5 abuts against the top surface of the support ring 13 to be supported, and the bottom end surface of the sleeve 43 abuts against the sealing ring 5 to fix the sealing ring 5 inside the open end of the cylinder 1, so that the sealing ring 5 seals the open end of the cylinder 1, so that the gas is not easy to leak, and the gas pressure is accurate.

[0027] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A deflection-proof air cylinder characterized by: The utility model provides a cylinder, piston, piston rod, sleeve seat, the cylinder is provided with one end opening containing cavity, the piston is arranged in the containing cavity, one end of piston rod is connected with the piston fixedly, and the piston rod is from the containing cavity opening and extends the cylinder, the piston rod outer wall is provided with the limit groove along its axial direction extension, the opening end of cylinder is fixedly provided with the sealing ring, the piston rod is from the sealing ring ring mouth and extends, and the sealing ring ring mouth inner wall is provided with the sealing block matched with the limit groove, the sealing block is clamped into the limit groove, the sleeve seat is fixed on the outer wall of the opening end of the cylinder, and the sleeve seat is provided with the sleeve hole matched with the diameter of the piston rod, the piston rod passes out of the sleeve seat from the sleeve hole and the outer wall thereof is attached to the inner wall of the sleeve hole, and the sleeve seat is fixed with the hard clamping block matched with the limit groove in the sleeve hole, the hard clamping block is clamped into the limit groove, and both ends of the cylinder are provided with the air hole communicating with the containing cavity.

2. A deflection-proof air cylinder according to claim 1, characterized in that The limit groove is provided as a V-shaped groove, and the cross sections of the sealing block and the hard clamping block correspondingly form a V shape.

3. A deflection-proof air cylinder according to claim 1, characterized in that: The hard clamping block and the sleeve seat are fixed by bolt locking.

4. A deflection-proof air cylinder according to claim 1, characterized in that: The sleeve seat comprises a fixed block and a sleeve pipe, the fixed block is provided with a slot penetrating through its thickness, the profile and size of the slot match the profile and size of the opening end of the cylinder, the fixed block is sleeved into the opening end of the cylinder through the slot and is fixedly connected with the outer wall of the cylinder, a circular accommodating groove is concavely arranged on the top surface of the fixed block, the inner diameter of the circular accommodating groove matches the outer diameter of the sleeve pipe, and the slot is within the diameter range of the circular accommodating groove, one end of the sleeve pipe penetrates into the circular accommodating groove, the sleeve hole is the inner hole of the sleeve pipe, the hard clamping block is fixed on the sleeve pipe, the outer wall of the sleeve pipe is provided with a connecting ring block, the connecting ring block is fixedly connected with the fixed block, and a plurality of through holes penetrating through the thickness of the fixed block are arranged on the top surface of the fixed block.

5. A yaw preventing cylinder according to claim 4, characterized in that: The sleeve pipe is provided with a positioning groove on the inner wall of the sleeve hole, and the hard clamping block is provided with a positioning portion matched with the positioning groove, the positioning portion is clamped into the positioning groove.

6. A deflection-proof air cylinder according to claim 4, characterized in that: The connecting ring block is provided with a plurality of arc-shaped grooves penetrating through its thickness, the plurality of arc-shaped grooves are uniformly arranged around the center of the sleeve hole, the arc-shaped grooves extend with the center of the sleeve hole as the center, the top surface of the fixed block is provided with a plurality of first threaded holes, the bottom surface of the connecting ring block abuts against the top surface of the fixed block, the number of the arc-shaped grooves is the same as the number of the first threaded holes, and the plurality of arc-shaped grooves and the plurality of first threaded holes are one-to-one aligned, and the connecting ring block and the fixed block are fixed by screwing the bolts through the arc-shaped grooves and into the first threaded holes.

7. A deflection-proof air cylinder according to claim 4, characterized in that: The inner wall of the opening end of the cylinder is provided with a supporting ring, the bottom surface of the sealing ring abuts against the top surface of the supporting ring to be supported, and the bottom end surface of the sleeve pipe abuts against the sealing ring.

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