CN220319109U - Telescopic cross rod with adjustable joint size - Google Patents

Abstract

The utility model relates to the technical field of building scaffolds, in particular to a telescopic cross rod with an adjustable joint size, which comprises an inner pipe, an outer pipe and a locking assembly, wherein the outer pipe is sleeved outside the inner pipe, the end part of the inner pipe protrudes out of the outer pipe, and the locking assembly is arranged at the joint of the inner pipe and the outer pipe; the end part of the inner tube, which is far away from the outer tube, is provided with a first connector, and a first clamping part capable of adjusting the size of the opening is arranged on the first connector; the end part of the outer tube, which is far away from the inner tube, is provided with a second connector, and a second clamping part capable of adjusting the size of the opening is arranged on the second connector. The utility model aims to solve the problems that the length of the connecting cross rod of the existing scaffold cannot be adjusted and the two ends of the connecting cross rod cannot be matched with stand columns with different pipe diameters, and provides the telescopic cross rod with adjustable joint size.

Description

Telescopic cross rod with adjustable joint size

Technical Field

The utility model relates to the technical field of building scaffolds, in particular to a telescopic cross bar with an adjustable joint size.

Background

In the field of construction, a scaffold is a working platform erected for ensuring that each construction process is carried out smoothly, and along with the advent of a large number of modern large-scale building systems in China, the fastener type steel pipe scaffold cannot adapt to the development needs of building construction, so that the novel scaffold is urgent to develop and popularize.

The existing tower type combined bracket or the disc buckle type scaffold is generally of an integrated structure, when a beam slab formwork with a variable length span is built, the length of the required cross rod is different due to the influence of modulus change, the length of the existing cross rod cannot be adjusted, and horizontal cross rods with various sizes are required to be selected for different construction objects during erection; the like products circulated in the market at present are generally scaffolds with adaptive single pipe diameters, or scaffolds with phi 48 pipe diameters or scaffolds with phi 60 pipe diameters, so that the universality is poor, the construction is inconvenient, the construction period is delayed, and the project cost is increased. There is therefore a strong need for a telescopic scaffold connecting rail which overcomes the above problems.

The Chinese patent discloses a length-adjustable disc buckle type cross rod and a construction method, wherein the length-adjustable disc buckle type cross rod comprises a middle pipe and two mounting pipes, the middle pipe comprises two mounting pipes which are respectively and slidably sleeved at two ends of the middle pipe, and one end of each mounting pipe, which is far away from the middle pipe, is a mounting end connected with a scaffold upright rod; the device also comprises two centering sleeves, wherein one end of each centering sleeve is sleeved with the middle tube, and the other end of each centering sleeve is sleeved with the mounting tube so as to realize coaxial sleeve connection between the middle tube and the mounting tube; the device also comprises two fixing fasteners, wherein the middle tube and the two mounting tubes are detachably fixed; the cross rod can solve the problem that the length of the cross rod of the disc-buckling scaffold is stepless to adjust, the field construction difficulty can be effectively reduced, the application range and the erection efficiency of the disc-buckling scaffold are greatly improved, but the cross rod can only be matched with the upright posts with single pipe diameter at two ends of the cross rod, and the cross rod cannot be applied to the upright posts with different pipe diameters, so that the universality of the cross rod is still to be improved.

Disclosure of Invention

The utility model aims to solve the problems that the length of the connecting cross rod of the existing scaffold cannot be adjusted and the two ends of the connecting cross rod cannot be matched with stand columns with different pipe diameters, and provides the telescopic cross rod with adjustable joint size.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the telescopic cross rod with the adjustable joint size comprises an inner pipe, an outer pipe and a locking assembly, wherein the outer pipe is sleeved outside the inner pipe, the end part of the inner pipe protrudes out of the outer pipe, and the locking assembly is arranged at the joint of the inner pipe and the outer pipe and can clamp the inner pipe and the outer pipe; the end part of the inner tube, which is far away from the outer tube, is provided with a first connector, and a first clamping part capable of adjusting the size of the opening is arranged on the first connector; the end part of the outer tube, which is far away from the inner tube, is provided with a second connector, and a second clamping part capable of adjusting the size of the opening is arranged on the second connector.

According to the telescopic cross rod with the adjustable joint size, the left and right first connectors and the second connectors are arranged, the first clamping part capable of adjusting the opening size is arranged on the first connectors, the second clamping part capable of adjusting the opening size is arranged on the second connectors, and the scaffold with the variable diameter of phi 48-phi 60 can be adapted by adjusting the opening sizes of the different diameters of the upright posts at the two ends of the cross rod and clamping the upright posts by the first clamping part and the second clamping part; meanwhile, the outer tube is inserted into the inner tube, the relative positions of the inner tube and the outer tube are adjusted, the total length of the cross bars meets the requirement, the inner tube is clamped by the locking assembly, the relative positions of the inner tube and the outer tube are fixed, and the use reliability and the use safety are ensured, so that the utility model can be widely applied to nonstandard modular scaffolds, the number of cross bars with different specifications and sizes in a building system is reduced, the types of the cross bars are unified, the cost is reduced, and the working efficiency is improved.

Further, the first clamping part comprises a first fixed part, a first movable part and a first locking part, the first movable part is rotationally connected with the first fixed part, the first locking part is spliced with the first fixed part, and the first movable part can be abutted with the first locking part; the second clamping part comprises a second fixed part, a second movable part and a second locking part, the second movable part is rotationally connected with the second fixed part, the second locking part is spliced with the second fixed part, and the second movable part can be abutted with the second locking part. An opening is formed between the first movable part and the first fixed part, the first movable part can rotate relative to the first fixed part to adjust the size of the opening, then the upright posts with different pipe diameters are adapted, after the opening size is adjusted and the upright posts are clamped, the first locking part is used for being inserted into the first fixed part, and meanwhile the first locking part is enabled to be in butt joint with the first movable part to limit so as to achieve the locking purpose. The second clamping portion is similar in structure and principle to the first clamping portion.

Further, the first movable part and the second movable part are arc-shaped structures; the side, close to the first movable part, of the first fixed part is provided with a first limit groove, and the first limit groove extends from one end of the first fixed part to the other end of the first fixed part; the second fixed part is provided with a second limit groove near the side of the second movable part, and the second limit groove extends from the two ends of the second fixed part to the other end. The first movable part and the second movable part of the arc-shaped structure are convenient to be matched with the circular tube shape of the upright post so as to achieve a better clamping effect; the purpose that first spacing groove set up is also being convenient for first fixed part and first movable part synergism, carries out better centre gripping to the post jointly. The setting purpose of the second limit groove is similar to that of the first limit groove.

Further, the first movable part is provided with two first bulges which are of an arc-shaped structure, the two first bulges are arranged on the side, close to the first fixed part, of the first movable part, and the two first bulges extend outwards from the two end faces of the first movable part respectively; the second movable part is provided with second bulges, the second bulges are of arc structures, the number of the second bulges is two, the two second bulges are all arranged on the second movable part and are close to the second fixed part side, and the two second bulges extend outwards from the two end faces of the second movable part respectively. The first bulge and the second bulge can increase the contact area between the first movable part and the upright post and the contact area between the second movable part and the upright post, so that the friction force between the first bulge and the upright post is increased, and the stability of the scaffold is improved.

Further, the first locking part and the second locking part are both T-shaped bolts. The cross-sectional area of one end of the T-shaped bolt is small, the cross-sectional area of the other end is large, one end with small cross-sectional area is inserted into the first fixing part or the second fixing part first, the T-shaped bolt is tightly knocked down from top to bottom in the use process, the first movable part or the second movable part is gradually tightly pressed by means of the inclination of the back surface of the T-shaped bolt, the first movable part applies force towards the first fixing part or the second movable part applies force towards the second fixing part, and then the upright post is clamped and fixed.

Further, the first fixing portion and the second fixing portion are hollow structures. The first fixing part and the second fixing part which are arranged in the hollow mode can reduce weight.

Further, the first connector and the second connector are symmetrically arranged. The first connector and the second connector can adopt the same size and structure, so that the types of parts can be saved, and when the novel clamping device is used, the first connector and the second connector are arranged in a central symmetry manner by a cross rod, and two ends of the cross rod are respectively clamped and fixed by the first connector and the second connector.

Further, the locking assembly comprises a clamping block provided with an opening, a connecting plate and an inclined pin, wherein the clamping block is fixedly connected with the end part of the outer tube and is abutted against the inner tube, the connecting plate penetrates through two sides of the opening of the clamping block and is fixedly connected with the clamping block, a through hole is formed in the connecting plate, and the inclined pin is spliced with the through hole. The clamping blocks are used for clamping the inner pipe and/or the outer pipe, the length of the inserted length of the inner pipe and the length of the inserted length of the outer pipe are adjusted in the process of movably inserting the inner pipe and the outer pipe according to the requirements, the length of the cross rod can be adjusted, and the connecting plates and the inclined pins are matched for adjusting the opening size of the clamping blocks, so that the clamping of the clamping blocks is facilitated; the taper pin is of a wedge-shaped structure, and the taper pin is used for being inserted into the connecting plate, so that the opening size of the clamping block is adjusted, the relative position of the inner pipe and the outer pipe is kept unchanged, and the length of the cross rod is adjusted.

Further, the clamping blocks are of U-shaped structures. The clamp splice welds in outer tube tip, and the centre gripping to the inner tube is convenient for to U type structure.

Further, a first round hole is formed in the inner pipe near the end of the outer pipe in a penetrating manner, an elastic pin is arranged in the first round hole, and two ends of the elastic pin can protrude out of the inner pipe; the outer tube is close to the inner tube end and penetrates through the second round hole, and the elastic pin can be inserted into the second round hole. After the inner tube is arranged in the outer tube, the inner tube is inserted into the second round hole after passing through the first round hole by using the elastic pin, so that the inner tube and the outer tube are temporarily fixed.

The utility model has the beneficial effects that:

1. the inner pipe and the outer pipe can be telescopic, so that the length can be adjusted, and the requirements of scaffold construction can be flexibly met;

2. the scaffold is simple to install and disassemble, and can be adapted to scaffolds with different diameters from phi 48 to phi 60;

3. the manufacturing cost is low, the safety performance is high, and the overall stability of the scaffold can be ensured by simple operation;

4. the overall structure of the cross rod is scientific and high in rigidity, the cross rod is suitable for construction and use of various scaffold outer frames and inner frames, the total length of the cross rod is adjusted through the telescopic inner tube and the telescopic outer tube, and the cross rod can be suitable for different supporting spans, so that the cross rod can be widely applied on nonstandard sizes, the number of horizontal cross rods is reduced, the cost is reduced, and the working efficiency is improved.

Drawings

FIG. 1 is a block diagram of a first orientation of an adjustable joint size telescopic cross bar of the present utility model.

Fig. 2 is a block diagram of a second orientation of an adjustable joint size telescopic cross bar according to the present utility model.

Fig. 3 is a structural view of the first connector of the present utility model.

Fig. 4 is a structural view of a first fixing portion of the present utility model.

Fig. 5 is a structural view of a first movable portion of the present utility model.

Fig. 6 is a structural view of a second connector of the present utility model.

Fig. 7 is a structural view of a second fixing portion of the present utility model.

Fig. 8 is a structural view of a second movable portion of the present utility model.

Fig. 9 is a block diagram of the utility model with the clamping blocks and the connecting plates in a first orientation.

Fig. 10 is a block diagram of the utility model with the clamping blocks and the connecting plates in a second orientation.

Fig. 11 is a structural view of the angle pin of the present utility model.

Fig. 12 is a schematic view of the first connector when gripping the first post.

Fig. 13 is a schematic view of the first connector when clamping the second post.

Fig. 14 is a structural view of the first connector and the inner tube of the present utility model.

Fig. 15 is a structural view of the second connector and the outer tube of the present utility model.

Wherein, the graphic marks are described as follows:

1. an inner tube; 11. a first round hole; 2. an outer tube; 21. a second round hole; 3. a locking assembly; 31. clamping blocks; 311. square slot holes; 32. a connecting plate; 321. a through hole; 33. a taper pin; 4. a first connector; 41. a first fixing portion; 411. a first limit groove; 412. a first mounting hole; 413. a second mounting hole; 42. a first movable portion; 421. a first protrusion; 43. a first locking part; 5. a second connector; 51. a second fixing portion; 511. the second limit groove; 52. a second movable portion; 521. a second protrusion; 53. a second locking part; 6. an elastic pin; 7. a first upright; 8. and a second upright.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent.

The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there are orientations or positional relationships indicated by terms "upper", "lower", "left", "right", "long", "short", etc., based on the orientations or positional relationships shown in the drawings, this is merely for convenience in describing the present utility model and simplifying the description, and is not an indication or suggestion that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and are not to be construed as limitations of the present patent, and that it is possible for those of ordinary skill in the art to understand the specific meaning of the terms described above according to specific circumstances.

The technical scheme of the utility model is further specifically described by the following specific embodiments with reference to the accompanying drawings:

example 1

Referring to fig. 1 to 13, an embodiment 1 of an adjustable joint size telescopic cross rod of the present utility model includes an inner tube 1, an outer tube 2, and a locking assembly 3, wherein the outer tube 2 is sleeved outside the inner tube 1, the end of the inner tube 1 protrudes out of the outer tube 2, the locking assembly 3 is welded at the joint of the inner tube 1 and the outer tube 2 and is located at the side of the outer tube 2, and the inner tube 1 and the outer tube 2 are clamped by the locking assembly 3; the end part of the inner tube 1 far away from the outer tube 2 is provided with a first connector 4, the first connector 4 and the inner tube 1 are welded into a whole, and a first clamping part capable of adjusting the size of an opening is arranged on the first connector 4; the end part of the outer tube 2 far away from the inner tube 1 is provided with a second connector 5, the second connector 5 and the outer tube 2 are welded into a whole, and the second connector 5 is provided with a second clamping part capable of adjusting the size of the opening. The first clamping part and the second clamping part are respectively used for clamping the two upright posts, so that the cross bars are connected with the two upright posts, and the strength and the stability of the scaffold erected by the upright posts are further improved.

Specifically, the first clamping portion includes a first fixing portion 41, a first movable portion 42, and a first locking portion 43, where the first movable portion 42 is rotationally connected with the first fixing portion 41, the first locking portion 43 is inserted into the first fixing portion 41, and the first movable portion 42 can be abutted against the first locking portion 43; the first fixing part 41 is provided with a first mounting hole 412, and the first movable part 42 can rotate relative to the first fixing part 41 by inserting the rotating shaft into the end part of the first movable part 42 after passing through the first fixing part 41, so that the size of an opening formed by the first movable part 42 and the first fixing part 41 is adjusted, and the upright post is clamped in the opening; the first fixing portion 41 is further provided with a second mounting hole 413, the first locking portion 43 penetrates through the second mounting hole 413 and is inserted into the first fixing portion 41, the first locking portion 43 is arranged in a shape of the first locking portion 43, when the first locking portion 43 is inserted into the first fixing portion 41 to different depths, the first movable portion 42 is in abutting limiting with respect to different rotation positions of the first fixing portion 41, and therefore the purpose of adjusting the size of an opening is achieved. The second clamping part comprises a second fixed part 51, a second movable part 52 and a second locking part 53, the second movable part 52 is rotationally connected with the second fixed part 51, the second locking part 53 is spliced with the second fixed part 51, and the second movable part 52 can be abutted with the second locking part 53. The principle clamping principle of the second clamping part is similar to that of the first clamping part. Preferably, the first movable portion 42 and the second movable portion 52 are both arc-shaped structures; the first fixing portion 41 is provided with a first limiting slot 411 near the first movable portion 42 side, and the first limiting slot 411 extends from one end to the other end of the first fixing portion 41; the second fixing portion 51 is provided with a second limiting groove 511 near the second movable portion 52, and the second limiting groove 511 extends from two ends of the second fixing portion 51 to the other end. The first movable part 42 and the second movable part 52 of the arc-shaped structure are convenient to be matched with the circular tube shape of the upright post so as to achieve better clamping effect; the first limiting slot 411 is also provided for facilitating the cooperation of the first fixed portion 41 and the first movable portion 42, so as to better clamp the column. The second limiting groove 511 is provided for a purpose similar to that of the first limiting groove 411. Fig. 12 is a schematic view of the first connector 4 clamping the first upright post 7, fig. 13 is a schematic view of the first connector 4 clamping the second upright post 8, the pipe diameters of the first upright post 7 and the second upright post 8 are different, and the pipe diameter of the second upright post 8 is larger than that of the first upright post 7.

Further, the first movable portion 42 is provided with two first protrusions 421, the first protrusions 421 have an arc structure, the two first protrusions 421 are all disposed on the first movable portion 42 near the first fixed portion 41, and the two first protrusions 421 extend outwards from two end faces of the first movable portion 42 respectively; the second movable portion 52 is provided with two second protrusions 521, each second protrusion 521 has an arc structure, the two second protrusions 521 are both disposed on the second movable portion 52 near the second fixed portion 51, and the two second protrusions 521 extend outwards from two end surfaces of the second movable portion 52. When the first clamping part or the second clamping part clamps the upright, the first fixing part 41 and the first movable part 42, the second fixing part 51 and the second movable part 52 are both in contact with the upright, the first movable part 42 is provided with the first bulge 421, the second movable part 52 is provided with the second bulge 521, and the two bulges are beneficial to enlarging the contact area between the first movable part 42 and the upright, so that the friction force of the first clamping part or the second clamping part is increased, and the stability of the scaffold body of the scaffold is improved.

The first locking portion 43 and the second locking portion 53 are both T-shaped pins. In the using process of the first connector 4 and the second connector 5, the T-shaped bolt is tightly knocked down from top to bottom, and the first movable part 42 or the second movable part 52 is gradually tightly pressed by the inclination of the back surface of the T-shaped bolt, so that the first movable part or the second movable part is internally clamped with the upright column, and the cross rod can be matched with different types of scaffolds with the diameter of phi 48-phi 60.

The first fixing portion 41 and the second fixing portion 51 are hollow. The first fixing portion 41 and the second fixing portion 51 which are hollow can reduce weight.

Preferably, the inner tube 1 and the outer tube 2 are circular steel tubes made of carbon steel.

As an improvement of the embodiment, the locking assembly 3 includes a clamping block 31 with an opening, a connecting plate 32, and an inclined pin 33, wherein the clamping block 31 is fixedly connected with the end of the outer tube 2 and is abutted against the inner tube 1, the connecting plate 32 is arranged on both sides of the opening of the clamping block 31 in a penetrating manner and is fixedly connected with the clamping block 31 in a welding manner, specifically, first square groove holes 311 are formed on both sides of the clamping block 31, and the connecting plate 32 is inserted into both sides of the clamping block 31 through the square groove holes 311; the cross section of the through hole 321 arranged on the connecting plate 32 is square, and the inclined pin 33 is inserted into the square through hole 321 to be inserted into the connecting plate 32. Further, the clamp block 31 has a U-shaped structure. The taper pin 33 is of a wedge-shaped structure, the outer tube 2 is inserted through the inner tube 1, the opening size of the clamping block 31 is adjusted by inserting the taper pin 33 into the connecting plate 32, then the clamping block 31 clamps the inner tube 1, and the inner tube 1 and the outer tube 2 are locked and fixed after the length of the cross bar is adjusted, so that the cross bar can be widely applied to a non-standard modular scaffold, the overall variety and number of the cross bar are reduced, the cost is reduced, and the working efficiency is improved.

Example 2

The present embodiment is an embodiment 2 of a telescopic cross bar with adjustable joint size, which is similar to embodiment 1, except that the first connector 4 and the second connector 5 are symmetrically arranged. The first connector 4 and the second connector 5 can adopt the same size and structure, so that the types of parts can be saved, and when the novel clamping device is used, the first connector 4 and the second connector 5 are arranged in a cross rod central symmetry manner, and two ends of the cross rod are respectively clamped and fixed by the first connector 4 and the second connector 5.

Example 3

Fig. 14 to 15 show an embodiment 3 of an adjustable joint size telescopic cross rod of the present utility model, which is similar to embodiment 1, except that the end of the inner tube 1 near the outer tube 2 is provided with a first round hole 11 in a penetrating manner, the first round hole 11 is internally provided with an elastic pin 6, and two ends of the elastic pin 6 can be protruded out of the inner tube 1; the end of the outer tube 2, which is close to the inner tube 1, is provided with a second round hole 21 in a penetrating way, and the elastic pin 6 can be inserted into the second round hole 21. After the inner tube 1 is installed into the outer tube 2, the inner tube 1 is inserted into the second round hole 21 after passing through the first round hole 11 by using the elastic pin 6, so that the inner tube 1 and the outer tube 2 are temporarily fixed, and the beneficial effects are that the inner tube 1 and the outer tube 2 can be prevented from being carelessly separated under the condition that the inner tube 1 and the outer tube 2 are not clamped yet.

It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The telescopic cross rod with the adjustable joint size is characterized by comprising an inner pipe (1), an outer pipe (2) and a locking assembly (3), wherein the outer pipe (2) is sleeved outside the inner pipe (1) and the end part of the inner pipe (1) protrudes out of the outer pipe (2), and the locking assembly (3) is arranged at the joint of the inner pipe (1) and the outer pipe (2) and can clamp the inner pipe (1) and the outer pipe (2); the end part of the inner tube (1) far away from the outer tube (2) is provided with a first connector (4), and a first clamping part capable of adjusting the size of the opening is arranged on the first connector (4); the end part of the outer tube (2) far away from the inner tube (1) is provided with a second connector (5), and the second connector (5) is provided with a second clamping part capable of adjusting the size of the opening.

2. The telescopic cross rod with adjustable joint size according to claim 1, wherein the first clamping part comprises a first fixed part (41), a first movable part (42) and a first locking part (43), the first movable part (42) is rotationally connected with the first fixed part (41), the first locking part (43) is spliced with the first fixed part (41), and the first movable part (42) can be abutted with the first locking part (43); the second clamping part comprises a second fixed part (51), a second movable part (52) and a second locking part (53), the second movable part (52) is rotationally connected with the second fixed part (51), the second locking part (53) is inserted into the second fixed part (51), and the second movable part (52) can be abutted with the second locking part (53).

3. The telescopic rail with adjustable joint size according to claim 2, wherein the first movable portion (42) and the second movable portion (52) are both arc-shaped structures; the first fixing part (41) is provided with a first limit groove (411) close to the first movable part (42), and the first limit groove (411) extends from one end of the first fixing part (41) to the other end; the second fixed part (51) is provided with a second limit groove (511) near the second movable part (52), and the second limit groove (511) extends from the two ends of the second fixed part (51) to the other end.

4. A telescopic cross rod with adjustable joint size according to claim 3, wherein the first movable part (42) is provided with first protrusions (421), the first protrusions (421) are of arc-shaped structures, the number of the first protrusions (421) is two, the two first protrusions (421) are all arranged on the side, close to the first fixed part (41), of the first movable part (42), and the two first protrusions (421) face outwards from the two ends of the first movable part (42); the second movable part (52) is provided with second protrusions (521), each second protrusion (521) is of an arc-shaped structure, two second protrusions (521) are arranged, each second protrusion (521) is arranged on the side, close to the second fixed part (51), of the second movable part (52), and the two second protrusions (521) extend outwards from two end faces of the second movable part (52) respectively.

5. The telescopic rail of claim 4, wherein the first locking portion (43) and the second locking portion (53) are T-shaped pins.

6. The telescopic rail with adjustable joint dimensions according to any of claims 2 to 5, wherein the first fixing portion (41) and the second fixing portion (51) are hollow structures.

7. Telescopic cross bar with adjustable joint size according to claim 1, characterized in that the first joint (4) is arranged symmetrically to the second joint (5).

8. The telescopic cross rod with adjustable joint size according to claim 1, wherein the locking assembly (3) comprises a clamping block (31) with an opening, a connecting plate (32) and an inclined pin (33), the clamping block (31) is fixedly connected with the end part of the outer tube (2) and is abutted to the inner tube (1), the connecting plate (32) is penetrated at two sides of the opening of the clamping block (31) and is fixedly connected with the clamping block (31), a through hole (321) is formed in the connecting plate (32), and the inclined pin (33) is spliced with the through hole (321).

9. The telescopic rail with adjustable joint size according to claim 8, characterized in that the clamping blocks (31) are of U-shaped construction.

10. The telescopic cross rod with the adjustable joint size according to claim 1, wherein a first round hole (11) is formed in the inner tube (1) near the end of the outer tube (2) in a penetrating manner, an elastic pin (6) is arranged in the first round hole (11), and two ends of the elastic pin (6) can protrude out of the inner tube (1); the outer tube (2) is provided with a second round hole (21) near the end of the inner tube (1) in a penetrating way, and the elastic pin (6) can be inserted into the second round hole (21).