CN105736534A - Telescopic rod - Google Patents

Abstract

The invention discloses a telescopic rod, which comprises a rod body. A hydraulic cylinder, a first piston, and a piston rod are sequentially arranged in the rod body. One end of the piston rod extends out of the rod body. The rod body One end close to the hydraulic cylinder is connected with a connecting cylinder arranged vertically to the body of the rod. The connecting cylinder is provided with a second piston connected to the hydraulic cylinder. A rotating member is arranged above the second piston. The rotating member includes a The rotating handle outside the connecting cylinder, the rotating rod arranged under the rotating handle and connected with the second piston, the rotating rod can be telescopically embedded in the connecting cylinder. The invention can freely adjust the length of the telescopic rod without releasing the original pressure, is easy to operate, has a wide range of use, does not appear dislocation, stuck phenomenon, has the characteristics of stable connection, high precision and sensitivity, etc., and has good practicability. Promote widely.

Description

a telescopic rod

technical field

The invention relates to a telescopic rod.

Background technique

The telescopic rod has the characteristics of simple structure, flexible scalability, compact size when folded, etc., which is convenient to use, store and carry, and is widely used in different fields. A traditional telescopic rod includes an outer fixed sleeve and a telescopic rod embedded in the sleeve. The telescopic rod expands and contracts along the axial direction of the sleeve, and when adjusted to a suitable length or height, it is stuck in the sleeve and remains fixed relative to the sleeve, in order to prevent the dislocation between the telescopic rod and the sleeve from causing jamming , The cross-section of the telescopic rod is generally square or oval, which requires high precision, difficult processing technology, and cumbersome operation.

The invention of Chinese Patent No. 2012203646676 discloses a telescopic rod, which includes a core tube with an elastic pin at the end, an outer tube with a positioning hole on the tube wall, and a sleeve sleeved at the end of the outer tube. The core tube is round. The outer tube is a similar round tube, which means that the round tube protrudes outward and has a ridge parallel to the center line, and the positioning hole is set at the position of the ridge. Although this invention adopts circular pipe fittings to reduce processing difficulty, it still has the following defects: one, the distance between the extension and shortening of the telescopic rod is limited by the number of positioning holes on the outer tube and the distance between them, and the telescopic rod The length of the telescopic rod cannot be adjusted freely, the scope of use is limited, the practicability is poor, and the length of the telescopic rod has to be released before the original pressure can be adjusted, which is difficult and laborious; secondly, there is no relevant scale on the telescopic rod, so it is impossible to adjust the length of the telescopic rod. Visually display the length of elongation or shortening, which makes it inconvenient to use.

Contents of the invention

Aiming at the deficiencies in the prior art, the present invention provides a telescopic rod with wide application range, freely adjustable length and easy operation.

In order to achieve the above object, the technical scheme that the present invention takes:

A telescopic rod, comprising a hollow rod body, in which a hydraulic cylinder, a first piston, and a piston rod are sequentially arranged, and one end of the piston rod extends out of the rod body, and the rod body is close to One end of the hydraulic cylinder is connected with a connecting cylinder arranged perpendicular to the body of the rod, and a second piston connected to the hydraulic cylinder is arranged in the connecting cylinder, and a rotating member is arranged above the second piston, and the rotating member includes a The rotating handle outside the cylinder, the rotating rod arranged under the rotating handle and connected with the second piston, the rotating rod can be telescopically embedded in the connecting cylinder.

As an optimal technical solution, in order to visually display the distance of extension or shortening of the telescopic rod, facilitate operation, and improve the accuracy of telescopic, a scale is provided on the piston rod.

As a preferred technical solution, in order to make the telescopic rod easy to operate and at the same time ensure the tightness and stability of the connection of the telescopic rod, the rotating rod and the connecting cylinder are connected by threads.

As a preferred technical solution, in order to facilitate the connection between the connecting cylinder and the rod body, and at the same time ensure the tightness and stability of the connection, the rod body is connected to the connecting cylinder through the connecting piece on its end, and the connecting piece and the connecting cylinder are threaded. connect.

Compared with the prior art, the present invention has the beneficial effects:

1. The relative length of the rod body and the piston rod is changed by hydraulic means to realize the extension or shortening of the telescopic rod, which changes the traditional nesting structure and can freely adjust the length of the telescopic rod without releasing the original pressure. The operation is simple, the application range is wide, and the practicability is good.

2. There is a scale on the piston rod, which can visually display the distance that the telescopic rod is extended or shortened, which is convenient and practical to operate, and at the same time improves the accuracy of telescopic.

3. The rotating rod and the connecting cylinder are connected by thread, and the length adjustment of the telescopic rod is realized by rotation, which is easy to operate and the connection is tight and stable; the connecting piece connected with the connecting cylinder by thread is provided to facilitate the assembly of the connecting cylinder and the rod body. Also make sure the connections are tight.

Description of drawings

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a sectional view of the present invention;

Fig. 3 is the structural representation of bar body;

Fig. 4 is the structural representation of rotating member;

Figure 5 is a sectional view of the connecting cylinder;

Reference numerals: 1. rod body, 1-1, connector, 2. hydraulic cylinder, 3. first piston, 4. piston rod, 4-1, scale, 5. connecting cylinder, 6. second piston , 7, rotating part, 7-1, rotating handle, 7-2, rotating rod.

detailed description

As shown in Figures 1 and 2, a specific embodiment of the present invention is proposed, a telescopic rod, comprising a hollow rod body 1, in which a hydraulic cylinder 2, a first A piston 3 and a piston rod 4, one end of the piston rod 4 extends out of the rod body, and the diameter of the piston rod 4 extending out of the rod body 1 is smaller than the diameter of the piston rod 4 in the body 1, the rod One end of the main body 1 close to the hydraulic cylinder 2, that is, the top end, is connected with a connecting cylinder 5 arranged perpendicular to the rod body 1. The connecting cylinder 5 is provided with a second piston 6 connected to the hydraulic cylinder 2. The second piston 6 A T-shaped rotating member 7 is provided above, and the rotating member 7 includes a rotating handle 7-1 located outside the connecting cylinder 1, a rotating rod 7-2 arranged below the rotating handle 7-1 and connected to the second piston 6 , the rotating rod 7-2 is telescopically embedded in the connecting cylinder 5, and the top end of the rod body 1 is provided with a cylinder cover.

The piston rod 4 that extends out of the rod body 1 is provided with a scale 4-1, which can visually display the distance of extension or shortening of the telescopic rod, combined with the scale 4-1 for reasonable operation, it is simple and practical , while improving the accuracy of stretching.

The rotating rod 7-2 is threadedly connected with the connecting cylinder, that is, the outer upper end of the rotating rod 7-2 is provided with an external thread, as shown in Figure 4, and the corresponding position inside the connecting cylinder 5 is provided with an internal thread, as shown in Figure 5 As shown, just hold the rotating handle 7-1 and rotate to change the length of the rotating rod 7-2 embedded in the connecting cylinder 5, which is easy to operate, and the threaded connection ensures the tight connection between the rotating rod 7-2 and the connecting cylinder.

The rod body 1 is connected to the connecting cylinder 5 through the connecting piece 1-1 on its end, and the connecting piece 1-1 and the connecting cylinder 5 are connected by threads, that is, the outer surface of the connecting piece 1-1 is provided with external threads, As shown in Figure 3, an internal thread is provided at the corresponding position on the inner surface of the connecting cylinder 5, as shown in Figure 5, the thread fit makes the connecting cylinder 5 and the rod body 1 easy to assemble, the processing technology is simple, and at the same time ensures that the connection is tight and stability.

When the present invention is in use: connect the device or tool of the present invention to the corresponding position, if the length of the telescopic rod needs to be extended, hold the rotating handle 7-1 and rotate it downwards, and the second piston 6 squeezes the hydraulic cylinder 2 downwards , so that the hydraulic cylinder 2 pushes the first piston 3 forward, and then the first piston 3 pushes the piston rod 4 to extend out of the rod body 1; if the length of the telescopic rod needs to be shortened, hold the rotary handle 7-1 and rotate upward , the second piston 6 releases the hydraulic cylinder 2, so that the hydraulic cylinder 2 releases the first piston 3 to move backward, thereby shortening the length of the piston rod 4 extending out of the rod body 1; The relative length of part 1 and piston rod is realized.

Of course, the above is only a detailed description of the preferred specific implementation of the present invention in conjunction with the accompanying drawings, and is not intended to limit the scope of the present invention. All equivalent changes made according to the principle, structure and structure of the present invention should be covered by this within the scope of protection of the invention.

Claims (4)

1. null1. a telescoping rod，Rod member body (1) including hollow，It is characterized in that: in described rod member body (1), be sequentially provided with hydraulic cylinder (2)、First piston (3)、Piston rod (4)，Rod member body (1) is extended outward in one end of described piston rod (4)，Described rod member body (1) is connected near one end of hydraulic cylinder (2) and is perpendicular to company's cylinder (5) that rod member body (1) is arranged，It is provided with, in described even cylinder (5), the second piston (6) being connected with hydraulic cylinder (2)，Described second piston (6) be arranged over revolving part (7)，This revolving part (7) includes being positioned at even cylinder (5) rotary handle (7-1) outward、The lower section being located at rotary handle (7-1) and the swingle (7-2) being connected with the second piston (6)，Described swingle (7-2) scalability ground embeds and connects in cylinder (5).
2. 2. a kind of telescoping rod according to claim 1, it is characterised in that: described piston rod (4) is provided with graduation apparatus (4-1).
3. 3. a kind of telescoping rod according to claim 1 and 2, it is characterised in that: described swingle (7-2) is threaded connection with even cylinder (5).
4. 4. a kind of telescoping rod according to claim 3, it is characterized in that: described rod member body (1) is connected with even cylinder (5) by the connector (1-1) being located on its end, and connector (1-1) is threaded connection with even cylinder (5).