阅读说明：本技术 一种增压气缸 (Supercharging cylinder ) 是由 叶绍志 郑建丰 周龙庆 胡朝 于 2019-09-05 设计创作，主要内容包括：本发明提供了一种增压气缸,包括主体,主体包括前气缸和后气缸；后气缸包括多节顺序连接的增压缸；前气缸包括前缸体、第一活塞杆、第一活塞和自锁机构,第一活塞杆的尾端与第一活塞固定连接；第一活塞杆中间位置固定设置环形的挡件；自锁机构包括耐磨套、滑套组件、弹簧、限位块和钢珠；耐磨套固定连接在前缸体上,且环绕第一活塞杆设置；耐磨套上设置限位槽；滑套组件套在到第一活塞杆上；弹簧两端分别连接在挡件和滑套组件上；限位块一端连接在第一活塞杆上,且限位块上设置钢珠。本发明相对现有的气缸减小了尺寸,方便使用,大大增加了工作效率。(The invention provides a booster cylinder, which comprises a main body, wherein the main body comprises a front cylinder and a rear cylinder; the rear cylinder comprises a plurality of sections of pressurizing cylinders which are connected in sequence; the front cylinder comprises a front cylinder body, a first piston rod, a first piston and a self-locking mechanism, and the tail end of the first piston rod is fixedly connected with the first piston; an annular stopper is fixedly arranged in the middle of the first piston rod; the self-locking mechanism comprises a wear-resistant sleeve, a sliding sleeve assembly, a spring, a limiting block and a steel ball; the wear-resistant sleeve is fixedly connected to the front cylinder body and arranged around the first piston rod; the wear-resistant sleeve is provided with a limiting groove; the sliding sleeve assembly is sleeved on the first piston rod; two ends of the spring are respectively connected with the stopper and the sliding sleeve component; one end of the limiting block is connected to the first piston rod, and the limiting block is provided with a steel ball. Compared with the existing air cylinder, the size of the air cylinder is reduced, the air cylinder is convenient to use, and the working efficiency is greatly improved.)

1. A supercharge cylinder is characterized by comprising a main body, wherein the main body comprises a front cylinder and a rear cylinder; the rear cylinder comprises a plurality of sections of pressurizing cylinders which are connected in sequence; the front air cylinder comprises a front cylinder body, a first piston rod, a first piston and a self-locking mechanism, and the tail end of the first piston rod is fixedly connected with the first piston; an annular stopper is fixedly arranged in the middle of the first piston rod;

the self-locking mechanism comprises a wear-resistant sleeve, a sliding sleeve assembly, a spring, a limiting block and a steel ball;

the wear-resistant sleeve is fixedly connected to the front cylinder body and arranged around the first piston rod; the wear-resistant sleeve is provided with a limiting groove;

the sliding sleeve assembly is sleeved on the first piston rod;

two ends of the spring are respectively connected to the stopper and the sliding sleeve component;

one end of the limiting block is connected to the first piston rod, and the steel ball is arranged on the limiting block.

2. The supercharge cylinder of claim 1, wherein the number of the steel balls is 8, the 8 steel balls are uniformly distributed on the limiting block, and the steel balls surround the first piston rod.

3. The supercharge cylinder of claim 2, wherein a retainer ring is arranged on the sliding sleeve assembly, the retainer ring is arranged on the end face of the sliding sleeve assembly, and the retainer ring is arranged on the first piston rod.

4. The supercharge cylinder of claim 3, wherein the limiting block is further provided with a copper sleeve, and the copper sleeve is arranged on the end face of the limiting block.

5. The supercharge cylinder of claim 4, wherein each of said supercharge cylinders comprises a rear cylinder body, a second piston and a second piston rod, said rear cylinder body being integrally provided with a front cylinder body; the axis of each second piston rod coincides with the axis of the first piston rod.

6. The supercharge cylinder of claim 5, wherein the ball diameter of the steel ball is larger than the wall thickness of the limiting block.

Technical Field

The invention relates to the field of cylinders, in particular to a supercharging cylinder.

Background

With the development of industries such as aerospace, electronics, automobiles, household appliances and the like, welding technology is widely applied in industrial production. The resistance welding technology has the advantages of low welding cost, high production efficiency, good welding quality, simple operation, easy realization of mechanization and automation and the like, and is widely regarded.

Spot welding is one of resistance welding, and is a resistance welding method in which a workpiece is assembled into a lap joint and pressed between two columnar electrodes, and a workpiece (base material) metal is melted by resistance heat to form a welding spot. A manual integrated welding clamp (also known as a spot welder, hereinafter referred to as a welding clamp) is a common device for spot welding. According to the principle of resistance welding, the equipment consists of a welding tongs complete machine fixing mechanism, a pressurizing mechanism, a transmission mechanism, a welding loop, an electrode and a switch control mechanism. The pressurizing mechanism is one of the main mechanisms, and the pressurizing mechanism is a pressurizing cylinder of the welding tongs.

In order to meet the requirement that the welding tongs can cross over a high-profile workpiece or a wide-profile workpiece or a fixture to weld welding spots in the middle part of the workpiece and can quickly weld adjacent welding spots at the same time. Therefore, the clamp arms of the welding tongs are designed into a large opening state which can stride over a high-and-wide-profile workpiece or clamp and a small opening state which can be quickly closed by an electrode for welding. Therefore, the movement of the clamp arm during the welding process of the electrode clamp is divided into two types, i.e., a large opening state to a small opening state (hereinafter referred to as an auxiliary stroke) and a small opening state to electrode closing pressurization (hereinafter referred to as a working stroke). Both of these actions are realized by the operation of a pressurizing mechanism pressurizing cylinder (hereinafter referred to as a cylinder).

The cylinder is fixed on the whole welding pliers fixing mechanism through a screw, a piston rod of the cylinder is connected with a welding pliers arm to form a transmission mechanism, and the cylinder is driven to the pliers arm through the extension/retraction of the piston rod when working, so that the actions of auxiliary stroke and working stroke are completed.

In order to realize two-stage action of switching among three states when the welding tongs work, the air cylinder can be designed into two movements, and air inlet and air outlet in each section of the air cylinder are controlled by an auxiliary control device (an electromagnetic valve) of the air cylinder, so that the two movements of the air cylinder are realized.

The welding tongs comprise a front piston rod, a rear piston rod, a tong arm and a tong arm, wherein the front piston rod, the piston rod and the tong arm are connected in series, the piston rod, the tong arm and the tong arm are connected in series, the piston rod, the tong arm and the tong arm are connected in series, the.

The welding tongs clamp arm crosses the work piece or the anchor clamps of height, wide appearance with big opening state, swings the welding tongs and moves the electrode to the solder joint position, and the E chamber switches into admits air, and back piston rod is pushed out, and preceding piston rod follow-up is transmitted for the clamp arm, and the clamp arm is pushed to little opening state.

When the welding tongs are in a small opening state, the control electromagnetic valve switches the air inlet of the cavity B to the air inlet of the cavity A, C, D and simultaneously air inlet, the front piston rod is pushed out, the tong arms are driven to be in a closed and pressurized state of the electrode (the action is pressurized because the cavity A, C, D simultaneously air inlet). And then completing welding work, when welding is completed, controlling the electromagnetic valve to switch back to the cavity B for air intake, returning the piston rod to the air cylinder, transmitting the piston rod to the clamp arm, and pulling the clamp arm to a small opening state. The welding tongs can be swung to carry out the welding work of a plurality of adjacent welding spots.

The foregoing description is of the conventional cylinder construction and operation within the industry. The manual integrated soldering turret is manually operated equipment, has severe requirements on the size and the weight of the soldering turret, and has the need of being small and light all the time. The cylinder is an important component of the welding tongs, and occupies a large space and a large weight, and the structure adopted by the traditional pressurizing cylinder described above determines that the length of each section of the pressurizing cylinder of the cylinder needs the distance (the distance for the electrode to be continuously closed within an allowable range after being worn) of the auxiliary stroke distance of the welding tongs plus the working stroke distance plus the wear allowance distance of the cylinder. The diameter and the length of the pressure cylinder are designed according to the welding pressure required by the welding tongs and the size of the large-opening-state opening, and when the diameter of the pressure cylinder is limited, the number of the sections of the pressure cylinder needs to be increased when the pressure needs to be larger.

Specifically, as shown in fig. 1, in the conventional booster cylinder for a welding clamp, air pressure is input into an air chamber B and exhausted from an air chamber E, at this time, the stroke of the cylinder is L1, air pressure is simultaneously input into an air chamber B, E, and at this time, the stroke of the cylinder is L2; A. c, D air chambers simultaneously input air pressure, the cylinder stroke is L3 and the output pressure is multiplied because the air pressure receiving area is multiplied by the three air chambers simultaneously input air pressure. The structure of the cylinder body determines that the length of the cylinder body (A, C, D air chamber) for completing the pressurization of the cylinder stroke L3 must meet the distance required by the three cylinder strokes, and the external dimension of the cylinder body cannot be further reduced, so that the cylinder body cannot meet the requirement of increasingly-developed light-weight design.

Such structure causes the cylinder can not further do little and do lightly, and the heavy soldering turret lets operating personnel use more arduous, consumes physical power more, influences work efficiency. The bulky equipment has requirements on the height and physical strength of operators. Influencing the popularization and the application of the equipment.

Disclosure of Invention

In view of this, the invention provides a supercharging cylinder in order to solve the technical problems that the existing cylinder is more laborious to use, consumes more physical power and affects working efficiency.

The technical scheme of the invention is realized as follows:

a supercharge cylinder comprising a body including a front cylinder and a rear cylinder; the rear cylinder comprises a plurality of sections of pressurizing cylinders which are connected in sequence; the front air cylinder comprises a front cylinder body, a first piston rod, a first piston and a self-locking mechanism, and the tail end of the first piston rod is fixedly connected with the first piston; an annular stopper is fixedly arranged in the middle of the first piston rod;

the self-locking mechanism comprises a wear-resistant sleeve, a sliding sleeve assembly, a spring, a limiting block and a steel ball;

the wear-resistant sleeve is fixedly connected to the front cylinder body and arranged around the first piston rod; the wear-resistant sleeve is provided with a limiting groove;

the sliding sleeve assembly is sleeved on the first piston rod;

two ends of the spring are respectively connected to the stopper and the sliding sleeve component;

one end of the limiting block is connected to the first piston rod, and the steel ball is arranged on the limiting block.

Preferably, the number of the steel balls is 8, the 8 steel balls are uniformly distributed on the limiting block, and the steel balls surround the first piston rod.

Preferably, a check ring is arranged on the sliding sleeve assembly, the check ring is arranged on the end face of the sliding sleeve assembly, and the check ring is annularly arranged on the first piston rod.

Preferably, the limiting block is further provided with a copper sleeve, and the copper sleeve is arranged on the end face of the limiting block.

Preferably, each pressurizing cylinder comprises a rear cylinder body, a second piston and a second piston rod, and the rear cylinder body and the front cylinder body are integrally arranged; the axis of each second piston rod coincides with the axis of the first piston rod.

Preferably, the ball diameter of the steel ball is larger than the wall thickness of the limiting block.

Has the advantages that:

by arranging the pressurizing cylinder and the self-locking mechanism which are connected in sequence in multiple sections, compared with the traditional cylinder, the invention can greatly reduce the overall dimension of the cylinder under the conditions of the same output pressure and unchanged cylinder stroke, thereby better meeting the design requirements of miniaturization and light weight; the self-locking mechanism comprises a wear-resistant sleeve, a sliding sleeve component, a spring, a limiting block and a steel ball, and the structure replaces the function of an auxiliary cylinder in a pressurized cylinder for the existing industrial welding tongs through the internal structure, so that the total length of the cylinder is further shortened; compared with the existing air cylinder, the size of the air cylinder is reduced, the air cylinder is convenient to use, and the working efficiency is greatly improved.

Drawings

FIG. 1 is a schematic view of a conventional cylinder according to the present invention;

FIG. 2 is a schematic view of a supercharge cylinder of the present invention;

fig. 3 is a comparison of the cylinder strokes of the supercharge cylinder of the present invention, L1, L2, and L3, respectively.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 3, an embodiment of the present invention provides a supercharge cylinder, including a main body including a front cylinder 1 and a rear cylinder 2; the rear cylinder 2 comprises a plurality of sections of pressurizing cylinders which are connected in sequence; the front cylinder 1 comprises a front cylinder body, a first piston rod 3, a first piston 4 and a self-locking mechanism, wherein the tail end of the first piston rod 3 is fixedly connected with the first piston 4; an annular stopper 5 is fixedly arranged in the middle of the first piston rod 3;

the self-locking mechanism comprises a wear-resistant sleeve 6, a sliding sleeve component 7, a spring 8, a limiting block 9 and a steel ball 10;

the wear-resistant sleeve 6 is fixedly connected to the front cylinder body and arranged around the first piston rod 3; the wear-resistant sleeve 6 is provided with a limiting groove;

the sliding sleeve component 7 is sleeved on the first piston rod 3;

two ends of the spring 8 are respectively connected with the stopper 5 and the sliding sleeve component 7;

one end of the limiting block 9 is connected to the first piston rod 3, and the limiting block 9 is provided with a steel ball 10.

There are 8 steel balls 10, and 8 steel balls 10 evenly distributed are on stopper 9, and steel ball 10 encircles first piston rod 3.

The sliding sleeve assembly 7 is provided with a check ring 11, the check ring is arranged on the end face of the sliding sleeve assembly, and the check ring is annularly arranged on the first piston rod.

The limiting block 9 is further provided with a copper sleeve 16, and the copper sleeve 16 is arranged on the end face of the limiting block 9.

Each pressure cylinder comprises a rear cylinder body, a second piston and a second piston rod, and the rear cylinder body and the front cylinder body are integrally arranged; the axis of each second piston rod coincides with the axis of the first piston rod.

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention, and the specific working principle is described, as shown in fig. 2,

1. principle of integral action of cylinder

In fig. 2-3, the cylinder stroke is Ln (n is 1, 2, 3.)

The cylinder is fixedly connected with the outside through the end face of the sliding locking mechanism, when air pressure is input into the H air chamber 13 and air pressure is exhausted from the G air chamber 12, the cylinder body moves relative to the sliding locking mechanism, the first piston 4 and the first piston rod 3 to complete a cylinder stroke L1; the G air chamber 12 receives air pressure, the H air chamber 13 discharges air pressure, the I air chamber 14 receives air pressure, and the J air chamber 15 discharges air pressure, which is the cylinder stroke L2; the G air chamber 12 receives air pressure, the H air chamber 13 discharges air pressure, the J air chamber 15 receives air pressure, and the I air chamber 14 discharges air pressure, and at this time, the cylinder stroke L3 and the supercharging output are obtained. Since the cylinder block, which completes the pressurization by L3, does not need to contain the distance required for the cylinder stroke L1, the overall size of the entire cylinder is relatively greatly reduced.

2. Sliding locking mechanism

The components related to the piston rod comprise a first piston rod 3, a sliding sleeve assembly 7, a wear-resistant sleeve 6 (which is integrally installed with the cylinder body), a limiting block 9, a check ring 11, a copper sleeve 16, a steel ball 10 and a spring 8. When the stroke of the cylinder is switched from L1 to L2, the spring 8 can push the sliding sleeve assembly 7 to move along with the movement of the first piston rod 3, when the position of the L2 is reached, and the large-diameter part at the rear end of the sliding sleeve assembly 7 slides through the steel ball 10 in the limiting block 9, because the ball diameter of the steel ball 10 is greater than the wall thickness of the limiting block, the steel ball 10 is pushed out of the limiting block 9 and is clamped in the limiting groove of the wear-resistant sleeve 6, and the locking of the position of the L2 is completed; when the L2 switches the L1, the retainer ring 11 can drive the sliding sleeve component 7 to move along with the movement of the first piston 4, and at the moment, the steel ball 10 retreats and is separated from the limiting groove of the wear-resistant sleeve 6 until the L1 stroke is completed; when L2 switches L3 and L3 switches L2, the steel ball 10 is ejected out of the limit groove of the wear-resisting sleeve 6 due to the action of the spring 8 and the sliding sleeve assembly 7, and the cylinder body is locked to be incapable of moving, so that the strokes of L2 and L3 are completed.

Finally, it is to be noted that: the above description is only a preferred embodiment of the present invention, and is only for the purpose of illustrating the technical solutions of the present invention, and not for the purpose of limiting the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.