Pressing type limiting mechanism

Abstract

The utility model discloses a pressing type limiting mechanism which comprises a telescopic cavity and a telescopic column arranged in the telescopic cavity in a telescopic mode, a first reset spring is supported between the telescopic column and the bottom of the telescopic cavity, and the reset spring enables the telescopic column to push towards the direction of an end opening of the telescopic cavity. A limiting part is fixed on the inner wall of the telescopic cavity, and a clamping part corresponding to the limiting part is arranged on the telescopic column, so that the telescopic column is prevented from being separated from the telescopic cavity. The telescopic column extends into the inserting hole to enable the inner pipe body and the outer pipe body to be relatively fixed, the telescopic column retracts into the telescopic cavity through external pressing, and therefore the inner pipe body and the outer pipe body can relatively move in a telescopic mode in the axial direction, and the telescopic column can be conveniently inserted into the inserting holes in other positions. A plurality of inserting holes can be formed in the axial direction of the outer pipe body at intervals, so that the relative position of the inner pipe body and the outer pipe body is adjusted in the axial direction, and multi-stage adjustment of the length of the combined rod piece is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a clamping positioning device technical field, especially press type limiting mechanism. BACKGROUND

[0002] Now the lengthening of the rod piece usually adopts the threaded structure or welding, and the operation is troublesome, and the multistage adjustment of the connecting length is difficult to realize.

[0003] For example, in daily life, many places need to use telescopic rod piece structure, such as outdoor folding sunshade, clothesline, etc., and the rod piece is usually composed of two steel pipes with different diameters, the small-diameter steel pipe is inserted into the large-diameter steel pipe, the overall length is changed by pulling, and when the overall length reaches the required length, a fixing measure is needed to make the rod piece play a function at this length, so a quick fixing device is needed to realize the temporary or permanent fixing of such structure. SUMMARY

[0004] Therefore, the application provides a press type limiting mechanism to solve at least one of the above technical problems.

[0005] The utility model discloses a technical scheme, designs a press type limiting mechanism, including telescopic cavity, and the telescopic setting in the telescopic cavity telescopic column, the telescopic column with the first reset spring is supported between the telescopic cavity bottom, and the reset spring makes the telescopic column push to the telescopic cavity port direction, the telescopic cavity inner wall is fixed with the limiting portion, the telescopic column is provided with the clamping portion corresponding with the limiting portion, to prevent the telescopic column from separating from the telescopic cavity.

[0006] In some embodiments, the telescopic column has a sealing ring located between the limiting portion and the telescopic cavity port, and the sealing ring and the limiting portion are supported by a second reset spring.

[0007] In some embodiments, the sealing ring and the clamping portion are connected by a tension rope.

[0008] In some embodiments, the outer edge of the sealing ring and the inner wall of the telescopic cavity are sealingly and slidingly connected.

[0009] In some embodiments, the sealing ring and the corresponding port of the telescopic column are provided with a stepped portion extending towards the telescopic cavity port.

[0010] In some embodiments, the telescopic cavity is a cylindrical cavity, and the outer wall of the telescopic cavity port is provided with external threads.

[0011] In some embodiments, a positioning column is further included, and a radial positioning hole is formed in the positioning column, and an inner thread matched with the outer thread is arranged on the radial positioning hole.

[0012] In some embodiments, a positioning sleeve is sleeved on the positioning column, and a plug hole corresponding to the telescopic column is arranged on the positioning sleeve.

[0013] In some embodiments, the front end of the telescopic column is arc-shaped.

[0014] In some embodiments, the front end of the telescopic column is provided with a ball.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The telescopic column is inserted into the plug hole to fix the inner and outer pipe bodies, the telescopic column is retracted into the telescopic cavity by external pressing, so that the inner and outer pipe bodies can relatively move in the axial direction, and the telescopic column can be inserted into the plug hole at other positions.

[0017] The telescopic column is sleeved with a sealing ring between the limiting portion and the telescopic cavity port, so that the gap between the telescopic column and the plug hole is sealed, thereby preventing external foreign matters from entering the pipe body through the gap.

[0018] The utility model has the advantages of simple structure, stable operation, long-term use at the same position, threaded shell, installation on different rod members, convenient replacement if damaged. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model will be explained in detail in combination with specific embodiments and drawings, in order to show details, facilitate understanding of its principle, which is not necessarily drawn in proportion, and similar reference signs can describe similar parts in different views.

[0020] Wherein: Figure 1 is a schematic view of the telescopic column being extended.

[0021] Figure 2 is Figure 1 is an enlarged schematic view of A in the figure.

[0022] Figure 3 is a schematic view of the telescopic column being retracted.

[0023] Figure 4 is Figure 3 is an enlarged schematic view of B in the figure.

[0024] In the figure, 1, telescopic cavity; 2, telescopic column; 3, first reset spring; 4, check ring; 21, locking portion; 5, external thread; 6, inner tube body; 7, outer tube body; 71, insertion hole; 8, sealing ring; 9, second reset spring; 10, tension rope; 81, stepped portion. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present application, and the technical solutions of the present application are further described in conjunction with the accompanying drawings, but the present application is not limited to these embodiments, and the following embodiments do not limit the utility model involved in the claims. In addition, all combinations of the features described in the embodiments are not necessarily required by the solution of the utility model.

[0026] The principles and structures of the present application will be described in detail below in conjunction with the accompanying drawings and embodiments. EMBODIMENT

[0027] As Figure 1 , 2 , 3, 4, a pressing type limiting mechanism, comprising a telescopic cavity 1 and a telescopic column 2 arranged in the telescopic cavity 1, a first reset spring 3 is arranged between the telescopic column 2 and the bottom of the telescopic cavity 1, the reset spring pushes the telescopic column 2 to the port direction of the telescopic cavity 1, a check ring 4 is fixed on the inner wall of the telescopic cavity 1 as a limiting portion, and a locking portion 21 corresponding to the limiting portion is arranged on the telescopic column 2, so that the telescopic column 2 is prevented from being separated from the telescopic cavity 1.

[0028] When in use, the telescopic cavity 1 is fixed on a rod body or a tube body, so that the telescopic column 2 can be extended or retracted in the radial direction relative to the rod body, thereby clamping or releasing another tube body.

[0029] For example, as shown in the figure, the telescopic cavity 1 of the present embodiment is a cylindrical cavity, and an external thread 5 is arranged on the outer wall of the port of the telescopic cavity 1. An inner tube body 6 is used as a positioning column, a radial positioning hole is arranged on the inner tube body 6, and an internal thread matched with the external thread 5 is arranged on the radial positioning hole, so that the telescopic cavity 1 is connected with the inner tube body 6 through thread cooperation. An outer tube body 7 is sleeved on the outer sliding of the inner tube body 6 as a positioning sleeve, an insertion hole 71 corresponding to the telescopic column 2 is arranged on the outer tube body 7, the telescopic column 2 is inserted into the insertion hole 71 to fix the inner and outer tube bodies 7 relative to each other, and the telescopic column 2 is retracted into the telescopic cavity 1 through external pressing, so that the inner and outer tube bodies 7 can move relative to each other in the axial direction, thereby facilitating the insertion of the telescopic column 2 into the insertion hole 71 at other positions.

[0030] A plurality of insertion holes 71 can be provided along the axis of the outer tube body 7 at intervals, so as to adjust the relative position of the inner and outer tube bodies 7 in the axial direction, so that the total length after connection changes.

[0031] The sealing ring 8 between the limiting portion and the port of the telescopic cavity 1 is provided on the telescopic column 2, and a second return spring 9 is supported between the sealing ring 8 and the limiting portion, and the supporting force of the second return spring 9 makes the sealing ring 8 fit the inner wall of the outer tube body 7, so that the gap between the telescopic column 2 and the insertion hole 71 is sealed, thereby preventing foreign matter from entering the tube body through the gap.

[0032] The sealing ring 8 and the clamping portion 21 are connected by a tension rope 10, and when the telescopic head is retracted to a certain position, the sealing ring 8 is pulled into the telescopic cavity 1 by the tension rope 10 against the supporting force of the second return spring 9, so that the sealing ring 8 is away from the insertion hole 71, thereby facilitating the movement of the telescopic cavity 1 with the inner tube body 6 relative to the outer tube body 7.

[0033] The outer edge of the sealing ring 8 is in sealing sliding fit with the inner wall of the telescopic cavity 1, that is, the outer edge of the sealing ring 8 fits the sliding of the inner wall of the telescopic cavity 1, so that the telescopic cavity 1 also has a certain sealing effect to prevent foreign matter from entering.

[0034] The corresponding port of the sealing ring 8 and the telescopic column 2 is provided with a stepped portion 81 extending towards the port of the telescopic cavity 1, and when the sealing ring 8 fits the inner wall of the outer tube body 7, the stepped portion 81 is inserted into the insertion hole 71, thereby improving the sealing effect.

[0035] The front end portion of the telescopic column 2 is arc-shaped, for example, the end portion can be a ball head, so as to reduce the resistance of the telescopic column 2 relative to the inner wall of the outer tube body 7 after retraction. Further, the front end portion of the telescopic column 2 can be provided with a freely rotating ball, so that the resistance of the telescopic column 2 relative to the inner wall of the outer tube body 7 is smaller.

[0036] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or adopt similar ways to replace them, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

[0037] In addition, some ambiguous terms (for example, substantially, certain, generally, etc.) can refer to slight inaccuracy or slight deviation of conditions, quantities, values or sizes, etc., some of which are within the manufacturing deviation or tolerance range. It should be noted that the use of the words "first", "second", etc. to define parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application.

Claims

1. A press-type limiting mechanism, comprising a telescopic cavity and a telescopic column telescopically disposed within the telescopic cavity, characterized in that, A first return spring is supported between the telescopic column and the bottom of the telescopic cavity. The return spring pushes the telescopic column toward the port of the telescopic cavity. A limit part is fixed on the inner wall of the telescopic cavity. A locking part corresponding to the limit part is provided on the telescopic column to prevent the telescopic column from detaching from the telescopic cavity.

2. The press-type limiting mechanism according to claim 1, characterized in that, A sealing ring is slidably fitted on the telescopic column between the limiting part and the telescopic cavity port, and a second return spring is supported between the sealing ring and the limiting part.

3. The press-type limiting mechanism according to claim 2, characterized in that, The sealing ring and the locking part are connected by a tension rope.

4. The press-type limiting mechanism according to claim 2, characterized in that, The outer edge of the sealing ring is in a sealing sliding fit with the inner wall of the telescopic cavity.

5. The press-type limiting mechanism according to claim 2, characterized in that, The sealing ring and the expansion joint have a stepped portion extending toward the port of the expansion cavity on their respective edges.

6. The press-type limiting mechanism according to claim 1, characterized in that, The telescopic cavity is a cylindrical cavity, and the outer wall of the telescopic cavity port is provided with external threads.

7. The press-type limiting mechanism according to claim 6, characterized in that, It also includes a positioning post, on which a radial positioning hole is provided, and an internal thread that mates with the external thread is provided on the radial positioning hole.

8. The press-type limiting mechanism according to claim 7, characterized in that, The positioning post is slidably fitted with a positioning sleeve, and the positioning sleeve is provided with an insertion hole corresponding to the telescopic post.

9. The press-type limiting mechanism according to claim 1, characterized in that, The front end of the telescopic column is arc-shaped.

10. The press-type limiting mechanism according to claim 1, characterized in that, The front end of the telescopic column is equipped with ball bearings.

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