CN220596970U - Telescopic arm adjusting structure and telescopic device - Google Patents

Abstract

The utility model relates to the technical field of suspension platforms, and provides a telescopic arm adjusting structure and a telescopic device, wherein the telescopic arm adjusting structure comprises a multi-stage positioning part which is arranged at one of any two adjacent telescopic joints and is distributed at intervals along the telescopic direction of the telescopic joint; and the limiting part is arranged on the other one of any two adjacent expansion joints, and is used for limiting and inserting with one stage of the multi-stage positioning part in the stretching process of the multi-stage expansion joint. According to the telescopic joint, the adjusting structure is additionally arranged in the multi-section telescopic joint, the problem that the telescopic joint is easy to be blocked and damaged after the telescopic joint with small abrasion and failure of the current short-stroke telescopic friction is effectively solved, and the service life of the telescopic joint is prolonged.

Description

Telescopic arm adjusting structure and telescopic device

Technical Field

The utility model relates to the technical field of suspension platforms, in particular to a telescopic arm adjusting structure and a telescopic device.

Background

The telescopic arm in the suspension platform is used for extending the platform assembly from the tower position to the blade position so as to facilitate maintenance of the blade by workers, and the telescopic arm withdraws the platform assembly to the tower position after the maintenance is completed. A limiting device is arranged between the telescopic arms in the related art, but the limiting device is mainly used for preventing the two adjacent telescopic arms from being disjointed in the extending process.

Because the distance from the blade to the tower barrel is high in use frequency in a small stroke range, the telescopic arms move relatively, the telescopic arms with small cross sections stretch out and draw back in the telescopic arms with larger cross sections, but the friction force of the telescopic joints with larger cross sections and larger weight is larger, so that the reciprocating times of the telescopic arms with the smallest cross sections or smaller friction force are always more, the existing suspension platform limiting device cannot be well adjusted, and one or more telescopic arms with smaller friction force are seriously worn in the short stroke telescopic process, so that the telescopic arms are extremely easy to break down; in addition, the need to replace the entire telescoping arm of the suspension platform after wear of one or more telescoping arms not only affects the performance of the blade maintenance work, but also greatly affects the service life of the telescoping arm of the suspension platform.

Disclosure of Invention

The utility model provides a telescopic arm adjusting structure and a telescopic device, which are used for solving the defect that one or more telescopic arms with small friction force are seriously worn in the short-stroke telescopic process in the prior art, so that the telescopic arms are extremely easy to cause the problem that the clamping between the telescopic arms is failed, realizing the function of adjusting the stroke of a multi-section telescopic joint, effectively solving the problem that the telescopic joint is easy to be damaged after the abrasion failure of the telescopic joint with small friction force in the short-stroke telescopic process at present, and further prolonging the service life of the telescopic joint.

The utility model provides a telescopic arm adjusting structure which is used for adjusting the telescopic travel of a plurality of telescopic joints which are sleeved in sequence; the telescopic boom adjustment structure includes:

the multistage positioning parts are arranged at one of any two adjacent sections of expansion joints and are distributed at intervals along the expansion direction of the expansion joint;

and the limiting part is arranged at the other one of any two adjacent sections of the telescopic joints, and is used for limiting and inserting with one stage of the multi-stage positioning part in the stretching process of the telescopic joints.

According to the telescopic arm adjusting structure provided by the utility model, the multistage positioning part is arranged at one of any two adjacent telescopic joints, the limiting part is arranged at the other one of the two adjacent telescopic joints, and the first-stage positioning part is correspondingly opened according to the actual telescopic travel of the multi-section telescopic joint, so that the limiting part and one stage of the positioning part are subjected to limiting grafting in the stretching process of the multi-section telescopic joint, and the relative positions of the two adjacent telescopic joints are adjusted, so that the telescopic arm adjusting structure has the function of adjusting the travel of the multi-section telescopic joint. In addition, an adjusting structure is additionally arranged in the multi-section telescopic joint, the problem that the telescopic joint is easy to be blocked and damaged after the telescopic joint with small telescopic friction force in the short stroke is worn and failed at present is effectively solved, and the service life of the telescopic joint is further prolonged.

According to one embodiment of the present utility model, the positioning portion is disposed on a side wall of the expansion joint, and the limiting portion is disposed on a side wall of the expansion joint adjacent to the expansion joint and is disposed at an end portion of the expansion joint.

According to an embodiment of the present utility model, each stage of the positioning portion includes two positioning members that are opposite to each other, each two positioning members that are opposite to each other are respectively disposed on a side wall of the expansion joint, and the limiting portion includes two limiting members that are opposite to each other and disposed on the side wall of the expansion joint.

According to one embodiment of the present utility model, the positioning member includes a positioning hole and a cover, the positioning hole is configured on a side wall of the expansion joint, and the cover is detachably disposed on the expansion joint and is adapted to cover the positioning hole.

According to an embodiment of the present utility model, the limiting portion includes:

the limiting rod penetrates through the side wall of the expansion joint, and the first end of the limiting rod is suitable for limiting and inserting with the positioning part;

and one end of the elastic piece is limited on the side wall of the telescopic joint, and the other end of the elastic piece is limited on the second end of the limiting rod.

According to an embodiment of the present utility model, the limiting portion includes:

the installation shell is arranged on the side wall of the expansion joint and is provided with a containing cavity;

the elastic piece is positioned in the accommodating cavity, one end of the elastic piece is limited in the accommodating cavity, and the other end of the elastic piece is limited in the limiting rod;

the second end of the limiting rod is arranged in the accommodating cavity and is connected with the elastic piece, the first end of the limiting rod extends out of the accommodating cavity and penetrates through the side wall of the expansion joint and is suitable for being switched between a yielding position and a limiting position, the elastic force of the elastic piece is suitable for driving the first end of the limiting rod to be inserted into the positioning part so that the limiting rod is limited in the limiting position, and the first end of the limiting rod is in butt joint with the side wall of the adjacent expansion joint in the yielding position.

According to one embodiment of the present utility model, the first end of the limiting rod is formed with an inclined guiding surface, and the limiting rod is switched from the limiting position to the yielding position during the contraction process of two adjacent expansion joints.

According to one embodiment of the utility model, the second end of the limiting rod is connected with a guide rod, the guide rod and the limiting rod are coaxially arranged, and the guide rod penetrates through the installation shell.

According to one embodiment of the utility model, the locating pin is penetrated in the radial direction of the limiting rod, the installation shell is internally provided with a guide groove matched with the end part of the locating pin, and the end part of the locating pin is suitable for moving in the guide groove in the process that the locating pin moves along with the limiting rod.

The utility model also provides a telescopic device which comprises a plurality of telescopic joints which are sleeved in sequence, and the telescopic arm adjusting structure in the embodiment, wherein the telescopic arm adjusting structure acts between the adjacent telescopic joints.

According to the telescopic arm adjusting structure and the telescopic device, the multistage positioning parts are arranged on one of any two adjacent telescopic joints, the limiting parts are arranged on the other one of the two adjacent telescopic joints, and the first-stage positioning parts are correspondingly opened according to the actual telescopic travel of the multi-section telescopic joints, so that the limiting parts are in limiting connection with one of the positioning parts in the stretching process of the multi-section telescopic joints, and the relative positions of the two adjacent telescopic joints are adjusted, so that the telescopic arm adjusting structure has the function of adjusting the travel of the multi-section telescopic joints. In addition, an adjusting structure is additionally arranged in the multi-section telescopic joint, the problem that the telescopic joint is easy to be blocked and damaged after the telescopic joint with small telescopic friction force in the short stroke is worn and failed at present is effectively solved, and the service life of the telescopic joint is further prolonged.

Drawings

In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a telescopic arm adjustment structure provided by the present utility model;

fig. 2 is a schematic structural view of the telescopic arm adjusting structure (positioning portion is opened) provided by the present utility model;

fig. 3 is a schematic structural view of the telescopic arm adjusting structure (positioning portion is closed) provided by the present utility model;

fig. 4 is a schematic structural view of a limiting portion provided by the present utility model;

fig. 5 is a schematic structural view of a limiting portion (guide groove) provided by the present utility model;

FIG. 6 is a schematic view of a positioning portion according to the present utility model;

FIG. 7 is a schematic view of the structure of the six-joint telescopic joint in an extended state;

fig. 8 is a schematic structural view of the telescopic device provided by the utility model.

Reference numerals:

100. an expansion joint; 101. a first telescopic joint; 102. a second telescopic joint;

200. a positioning part; 201. positioning holes; 202. a cover body;

300. a limit part; 301. a limit rod; 3011. a sloped guide surface; 302. an elastic member; 303. a mounting shell; 304. a guide rod; 305. a positioning pin; 3031. a guide groove.

Detailed Description

Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the present application but are not intended to limit the scope of the present application.

In the description of the embodiments of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are based on those shown in the drawings, are merely for convenience in describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the embodiments of the present application will be understood by those of ordinary skill in the art in a specific context.

In the examples herein, a first feature "on" or "under" a second feature may be either the first and second features in direct contact, or the first and second features in indirect contact via an intermediary, unless expressly stated and defined otherwise. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The present exemplary embodiment first provides a telescopic arm adjusting structure applied to adjust the telescopic stroke of the sequentially sleeved multi-joint telescopic joint 100. As shown in fig. 1, the telescopic arm adjusting structure may include a multi-stage positioning portion 200 and a limiting portion 300.

The multi-stage positioning parts 200 are arranged at one of any two adjacent sections of telescopic joints 100, and the multi-stage positioning parts 200 are arranged at intervals along the telescopic direction of the telescopic joint 100; the limiting part 300 is arranged on the other section of any two adjacent sections of telescopic joints 100, and the limiting part 300 is used for limiting and inserting with one stage of the multi-stage positioning part 200 in the stretching process of the multi-section telescopic joints 100.

To facilitate understanding of the manner in which the positioning portion 200 and the limiting portion 300 are disposed in the multi-joint expansion joint 100, this example illustrates two expansion joints 100 of the multi-joint expansion joint 100, where two expansion joints 100 may be named as a first expansion joint 101 and a second expansion joint 102, and the remaining expansion joints 100 may be understood with reference to the first expansion joint 101 and the second expansion joint 102.

The cross sections of the first expansion joint 101 and the second expansion joint 102 are U-shaped, the first expansion joint 101 is sleeved with the second expansion joint 102 and arranged in a sliding manner, and in order to reduce friction force of the first expansion joint 101 and the second expansion joint 102 in the extending and contracting process, a sliding block is generally arranged at the contact position of the bottoms of the first expansion joint 101 and the second expansion joint 102. Moreover, in order to reduce the weight of the telescopic arm, the bottom of the telescopic arm is generally hollowed, and based on the weight of the telescopic arm, the adjusting structure can be arranged on the side walls of the first telescopic joint 101 and the second telescopic joint 102, so that the relative positions of the first telescopic joint 101 and the second telescopic joint 102 can be adjusted, and the sliding between the telescopic joints 100 is not affected. In addition, in order to further reduce the weight of the telescopic arm and ensure the strength, the telescopic arm may be made of aluminum, but is not particularly limited.

The multi-stage positioning portion 200 may be disposed at one side of the first telescopic joint 101, and the limiting portion 300 is disposed at one side of the second telescopic joint 102 adjacent to the first telescopic joint 101. Since one of any two adjacent expansion joints 100 can be provided with the multi-stage positioning part 200 or the limiting part 300, one side of the first expansion joint 101 or the second expansion joint 102 can be provided with the positioning part 200, and the other side can be provided with the positioning part 200 or the limiting part 300, but the joint of the two expansion joints 100 is required to be provided with the positioning part 200 and the limiting part 300 in the stretching process. In order to improve the production efficiency, the positioning portion 200 is generally provided on one side of the expansion joint 100 and the limiting portion 300 is provided on the other side, but the expansion joint 100 located at the head and tail may be provided with the positioning portion 200 or the limiting portion 300 on the side to which the other expansion joint 100 is connected due to its specificity.

The multi-stage positioning portion 200 configured on the first telescopic joint 101 can realize multi-stage positioning of the telescopic arm, but needs to be matched with the limiting portion 300 arranged on the second telescopic joint 102. The multi-stage positioning portion 200 can be understood as a plurality of positioning holes 201 formed on the first expansion joint 101, and one of the positioning holes 201 can be determined to be matched with the limiting portion 300 according to the relative stroke of the first expansion joint 101 and the second expansion joint 102, and the rest of the positioning holes 201 can be covered by a cover 202, such as a flange cover, to ensure that the limiting portion 300 is in limited insertion connection with only one of the positioning holes 201.

As shown in fig. 2, the limiting portion 300 may be understood as a conventional lock tongue structure, and has an elastic member 302 therein, which can provide locking force for the lock tongue, and before the lock tongue is in limited insertion with the positioning hole 201, the front end of the lock tongue abuts against the side wall of the first telescopic joint 101 and slides relatively, and when sliding to the positioning hole 201, the lock tongue pops up and is inserted into the positioning hole 201, thereby fixing the position between the first telescopic joint 101 and the second telescopic joint 102.

It should be noted that, the positioning portion 200 may also be disposed on the second expansion joint 102, and then the limiting portion 300 is adapted to be disposed on the first expansion joint 101, and only needs to satisfy that the limiting portion 300 can be inserted into the positioning portion 200 after the extending stroke is in place in the extending process of the first expansion joint 101 and the second expansion joint 102. In addition, in the multi-section expansion joint 100, in order not to affect the retraction between the multi-section expansion joints 100, no matter the limiting part 300 is arranged on the first expansion joint 101 or the second expansion joint 102, the limiting part 300 needs to be ensured to be arranged on the end part of the first expansion joint 101 or the second expansion joint 102, so that the multi-section expansion joint 100 is sleeved.

To further understand the application of the adjustment structure to telescoping arms, this example is illustrated with six telescoping joints 100 that are sequentially nested, as shown in FIG. 7. The six-joint expansion joint 100 has five connecting portions, and therefore, five sets of adjusting structures are required to be arranged at the six-joint expansion joint 100, and the arrangement mode can be set by referring to the modes of the first expansion joint 101 and the second expansion joint 102. The number of the positioning portions 200 on each expansion joint 100 may be set according to actual situations, and is not limited herein; of course, for the convenience of production and manufacture, the number of the positioning portions 200 on each expansion joint 100 may be set to be the same, for example, 3, 4 or 5, and the distance between the adjacent positioning portions 200 is not particularly limited, and may be designed according to the actual working conditions.

Under the stretching state of the six-section telescopic joint 100, the first section telescopic joint 100 serves as a fixed section, a limiting part 300 is arranged at the end part, close to the second section telescopic joint 100, of the first section telescopic joint, a multi-stage positioning part 200 and a limiting part 300 are correspondingly arranged at the two end parts of the middle four-section telescopic joint 100, the sixth section telescopic joint 100 serves as the last section telescopic joint 100, and a multi-stage positioning part 200 is formed at the end part, close to the fifth section telescopic joint 100, of the sixth section telescopic joint.

The multi-stage positioning of the six-section telescopic joint 100 needs to be adjusted according to the distance from the tower barrel to the blade, for example, the maximum distance from the blade (blade tip) to the tower barrel is 18 meters, and then the maximum one-stage positioning part 200 in the multi-stage positioning parts 200 in the telescopic joint 100 needs to be opened so that the limiting part 300 is spliced with the maximum one-stage positioning part 200, and the length of the six-section telescopic joint 100 reaches the longest 18 meters, thereby meeting the distance from the blade to the tower barrel.

However, in practical applications, the blade-to-tower distance is high in the use frequency of a small stroke range, for example, the six-joint expansion joint 100 is often extended to a position of 8 meters, and in the conventional expansion arm, the adjusting structure in this example is not provided, so during the extension of the six-joint expansion joint 100, since the weight of each expansion joint 100 and the friction force between each expansion joint are different, the extension length of each expansion joint 100 relative to one expansion joint 100 connected with each expansion joint is different, but the expansion joint or expansion joints 100 with lower friction force tend to be extended in a sliding manner relatively, and further the abrasion of one or several expansion joints 100 often participating in expansion is more serious compared with the other expansion joints 100.

The six sections of telescopic joints 100 with the adjusting structure in the example can be opened at one stage in the multi-stage positioning part 200 in advance according to the distance from the blade to the tower barrel, so that the limit part 300 on each telescopic joint 100 is ensured to be inserted into the positioning part 200, and the end part of the last section of telescopic joint 100 reaches the blade position.

Of course, to further ensure the safety of the multi-joint expansion joint 100 during extension, a hard stop arrangement may be provided at the ends of the expansion joint 100 at the extension limit.

In this embodiment, by arranging the multi-stage positioning portion 200 at one of the expansion joints 100 of any two adjacent sections, arranging the limiting portion 300 at the other section, and correspondingly opening the first-stage positioning portion 200 according to the actual expansion stroke of the expansion joint 100, the limiting portion 300 and the first stage of the positioning portion 200 are limited and inserted in the expansion process of the expansion joint 100, so as to adjust the relative positions of the expansion joints 100 of two adjacent sections, thereby having the function of adjusting the stroke of the expansion joint 100. In addition, an adjusting structure is additionally arranged in the multi-section telescopic joint 100, so that the problem that the telescopic joint 100 is easy to be blocked and damaged after the telescopic joint 100 with small abrasion and failure of the current short-stroke telescopic friction force is effectively solved, and the service life of the telescopic joint 100 is further prolonged.

The respective partial structures of the above-described telescopic arm adjustment structure in the present exemplary embodiment will be described in more detail with reference to fig. 1 to 7.

As shown in fig. 1, in one embodiment, the multi-stage positioning portion 200 is disposed on a side wall of the expansion joint 100, and the limiting portion 300 is disposed on a side wall of the expansion joint 100 adjacent to the expansion joint 100 and is located at an end of the expansion joint 100.

It can be understood that the multiple expansion joints 100 are slidably connected, and the sliding blocks connected with the multiple expansion joints are generally disposed at the bottom of the expansion joint 100, and in order to reduce the weight of the expansion joint 100, the bottom of the expansion joint 100 is generally hollow. Based on this, the multi-stage positioning portion 200 and the limiting portion 300 are both disposed on the side wall of the telescopic joint 100, and the limiting portion 300 is a member protruding out of the side wall of the telescopic joint 100, so as to avoid the limiting portion 300 from affecting the sleeving of the multi-stage telescopic joint 100 during the retraction process, and therefore, the limiting portion 300 is disposed at the end position of the telescopic joint 100. Of course, the multistage positioning portion 200 and the limiting portion 300 are provided only on one side wall of the telescopic joint 100, and the purpose of adjusting the stroke of the multi-stage telescopic joint 100 can be achieved, but the stability is poor, and in order to improve the stability, the present utility model can be provided with reference to the following embodiments.

As shown in fig. 1, in one embodiment, each stage of positioning portion 200 includes two opposite positioning members, each of which is disposed on a side wall of the telescopic joint 100, and the limiting portion 300 includes two limiting members disposed on the side wall of the telescopic joint 100.

It can be understood that the positioning portions 200 are disposed on two opposite side walls of the expansion joint 100, and the limiting members are disposed on the side walls of the adjacent expansion joint 100 correspondingly, in the expansion of the expansion joint 100, the limiting portions 300 are inserted into the first-stage positioning portions 200 to prevent the expansion joint 100 from sliding continuously, and the two side walls of the expansion joint 100 form limiting insertion, so that the stability of the expansion joint 100 after expansion is greatly improved, the shaking of the expansion joint 100 is avoided, and the friction force generated by the expansion joint 100 in the retraction process is reduced as much as possible, so that the retraction of the expansion joint is smoother.

As shown in fig. 2, 3 and 6, in one embodiment, the positioning member includes a positioning hole 201 and a cover 202, the positioning hole 201 is configured on a side wall of the telescopic joint 100, and the cover 202 is detachably disposed on the telescopic joint 100 and is suitable for covering the positioning hole 201.

It will be appreciated that the locating holes 201 are formed in the side walls of the telescopic joint 100, and that the locating holes 201 are flush with the side walls of the telescopic joint 100 without affecting the nesting of adjacent telescopic joints 100 therewith. Before use, according to the obtained distance between the tower barrel and the blades, the opening or closing of the positioning holes 201 on each section of telescopic joint 100 is correspondingly adjusted, each adjustment only correspondingly opens one stage of positioning holes 201, and all other positioning holes 201 are closed through the cover 202, for example, the positioning holes 201 can be covered by connecting with the telescopic joint 100 through a flange cover.

In one embodiment, the stop 300 includes a stop lever 301 and an elastic member 302, i.e., the structure of fig. 2 with the mounting housing 303 removed. The limiting rod 301 penetrates through the side wall of the telescopic joint 100, and the first end of the limiting rod 301 is suitable for limiting and inserting with the positioning part 200; one end of the elastic member 302 is limited on the side wall of the telescopic joint 100, and the other end is limited on the second end of the limiting rod 301.

It will be appreciated that the second end of the stop lever 301 is connected to the elastic member 302, and can be powered by the stored force of the elastic member 302. When the multi-section telescopic joint 100 is switched from the contracted state to the expanded state, the first end of the limiting rod 301 abuts against the side wall of the adjacent telescopic joint 100 under the action of the elastic piece 302 and moves along with the movement of the telescopic joint 100, and when the telescopic joint moves to the opened positioning hole 201, the telescopic joint is inserted into the positioning hole 201 under the action of the elastic piece 302, so that the limiting of the adjacent telescopic joint 100 is realized. The elastic member 302 may be a spring, but is not particularly limited.

As shown in fig. 2 and 3, in one embodiment, the stop 300 further includes a mounting housing 303. The installation shell 303 is arranged on the side wall of the telescopic joint 100, and the installation shell 303 is provided with a containing cavity; the elastic piece 302 is positioned in the accommodating cavity, one end of the elastic piece 302 is limited in the accommodating cavity, and the other end of the elastic piece 302 is limited in the limiting rod 301; the second end of the limiting rod 301 is disposed in the accommodating cavity and connected with the elastic member 302, the first end of the limiting rod 301 extends out of the accommodating cavity and penetrates through the side wall of the telescopic joint 100, and is suitable for switching between a yielding position and a limiting position, the elastic force of the elastic member 302 is suitable for driving the first end of the limiting rod 301 to be inserted into the positioning portion 200, so that the limiting rod 301 is limited in the limiting position, and in the yielding position, the first end of the limiting rod 301 is abutted against the side wall of the adjacent telescopic joint 100.

It will be appreciated that the mounting housing 303 is configured to receive the resilient member 302 and the stop bar 301, with the second end of the stop bar 301 extending from the receiving cavity and through the side wall of the telescopic joint 100 and abutting the side wall of an adjacent telescopic joint 100. When the multi-section telescopic joint 100 is switched from the contracted state to the expanded state, the first end of the limiting rod 301 always abuts against the side wall of the adjacent telescopic joint 100 under the action of the elastic piece 302 and moves along with the movement of the telescopic joint 100, and when the telescopic joint moves to the opened positioning hole 201, the first end of the limiting rod 301 is inserted into the positioning hole 201 under the action of the elastic piece 302, so that the limiting of the adjacent telescopic joint 100 is realized, and the purpose of adjusting the stroke of the telescopic joint 100 is realized.

As shown in fig. 4, in one embodiment, the first end of the stop lever 301 is formed with an inclined guide surface 3011, and the stop lever 301 is switched from the stop position to the yield position during retraction of two adjacent telescopic joints 100.

It will be appreciated that when the multi-section telescopic joint 100 is switched from the expanded state to the contracted state, the stopper rod 301 needs to be moved out of the positioning hole 201, but because the elastic member 302 applies the unidirectional force to the stopper rod 301, the force for moving out of the positioning hole 201 cannot be applied to the stopper rod 301, and therefore, the stopper rod 301 needs to be moved out of the positioning hole 201 by the retraction of the telescopic joint 100. The inclined guide surface 3011 is convenient for the first end of the limiting rod 301 to slide out of the positioning hole 201, so that the limiting rod 301 is switched from the limiting position to the yielding position.

As shown in fig. 2 and 3, in one embodiment, a second end of the limiting rod 301 is connected to a guide rod 304, the guide rod 304 is disposed coaxially with the limiting rod 301, and the guide rod 304 is disposed through the mounting housing 303.

It can be appreciated that the guide rod 304 is disposed through the mounting housing 303 and is coaxially connected with the limit rod 301, so that the limit rod 301 can move along a direction perpendicular to the side wall of the telescopic joint 100, so as to avoid the limit rod 301 deviating from the side wall of the telescopic joint 100 by a larger angle, and the alignment and insertion of the limit rod 301 and the positioning hole 201 are affected. The elastic member 302 may be a spring, and is sleeved on the guide rod 304.

As shown in fig. 3 and 5, in one embodiment, the positioning pin 305 is penetrated in the radial direction of the stop lever 301, and the installation housing 303 is configured with a guide groove 3031 adapted to the end of the positioning pin 305, and during the movement of the positioning pin 305 along with the stop lever 301, the end of the positioning pin 305 is adapted to move in the guide groove 3031.

It is to be appreciated that the positioning pin 305 is disposed in the stop lever 301 in a penetrating manner and is disposed perpendicular to the stop lever 301, and the installation housing 303 is further internally provided with a guide groove 3031 for accommodating an end portion of the positioning pin 305, wherein the guide groove 3031 is disposed along an axial direction of the stop lever 301, so that the positioning pin 305 can be conveniently moved along the movement of the stop lever 301, and meanwhile, the stop lever 301 is prevented from rotating circumferentially, so that the inclined guide surface 3011 disposed at the first end of the stop lever 301 is prevented from rotating, and therefore, when the multi-section telescopic joint 100 is contracted, the first end of the stop lever 301 is smoothly moved out of the stop hole.

The present exemplary embodiment further provides a telescopic device, as shown in fig. 8, including a plurality of telescopic joints 100 that are sequentially sleeved, and a telescopic arm adjusting structure of the foregoing embodiment, where the telescopic arm adjusting structure acts between adjacent telescopic joints 100.

It can be understood that the multiple expansion joints 100 are slidably connected, and the above-mentioned telescopic arm adjusting structure is disposed between any two adjacent very telescopic joints, so as to adjust the telescopic stroke between the multiple expansion joints 100, and the specific adjusting structure can be understood with reference to the above-mentioned embodiments, which is not described herein again.

The multi-stage positioning part 200 is arranged on one of the expansion joints 100 of any two adjacent joints, the limiting part 300 is arranged on the other joint, and the one-stage positioning part 200 is correspondingly opened according to the actual expansion stroke of the multi-joint expansion joint 100, so that the limiting part 300 and one stage of the positioning part 200 are subjected to limiting grafting in the expansion of the multi-joint expansion joint 100, and the relative positions of the two adjacent joints expansion joint 100 are adjusted, so that the multi-joint expansion joint 100 has the function of adjusting the stroke of the multi-joint expansion joint 100. In addition, an adjusting structure is additionally arranged in the multi-section telescopic joint 100, so that the problem that the telescopic joint 100 is easy to be blocked and damaged after the telescopic joint 100 with small telescopic friction force in the short stroke is worn and failed at present is effectively solved, and the service life of the telescopic device is further prolonged.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (8)

1. The telescopic arm adjusting structure is characterized by being used for adjusting the telescopic travel of the telescopic joints which are sleeved in sequence; the telescopic boom adjustment structure includes:

the multistage positioning parts are arranged at one of any two adjacent sections of expansion joints and are distributed at intervals along the expansion direction of the expansion joint; the multi-stage positioning parts are arranged on the side walls of the expansion joints, each stage of positioning parts comprises two opposite positioning pieces, and the two opposite positioning pieces are respectively arranged on the side walls of the expansion joints;

the limiting part is arranged on the other one of any two adjacent sections of telescopic joints, and is used for limiting and splicing with one stage of the multi-stage positioning part in the stretching process of the multi-stage telescopic joint; the limiting part is arranged on the side wall of the expansion joint adjacent to the expansion joint and is positioned at the end part of the expansion joint; the limiting part comprises two limiting pieces which are oppositely arranged on the side wall of the telescopic joint.

2. The telescopic arm adjustment mechanism according to claim 1, wherein the positioning member includes a positioning hole and a cover, the positioning hole is formed in a side wall of the telescopic joint, and the cover is detachably disposed on the telescopic joint and adapted to cover the positioning hole.

3. The telescopic arm adjustment structure according to claim 1 or 2, wherein the limit portion includes:

the limiting rod penetrates through the side wall of the expansion joint, and the first end of the limiting rod is suitable for limiting and inserting with the positioning part;

and one end of the elastic piece is limited on the side wall of the telescopic joint, and the other end of the elastic piece is limited on the second end of the limiting rod.

4. The telescopic arm adjustment structure according to claim 1 or 2, wherein the limit portion includes:

the installation shell is arranged on the side wall of the expansion joint and is provided with a containing cavity;

the elastic piece is positioned in the accommodating cavity, one end of the elastic piece is limited in the accommodating cavity, and the other end of the elastic piece is limited in the limiting rod;

the second end of the limiting rod is arranged in the accommodating cavity and is connected with the elastic piece, the first end of the limiting rod extends out of the accommodating cavity and penetrates through the side wall of the expansion joint and is suitable for being switched between a yielding position and a limiting position, the elastic force of the elastic piece is suitable for driving the first end of the limiting rod to be inserted into the positioning part so that the limiting rod is limited in the limiting position, and the first end of the limiting rod is in butt joint with the side wall of the adjacent expansion joint in the yielding position.

5. The telescopic arm adjustment mechanism according to claim 4, wherein the first end of the limit lever is formed with an inclined guide surface, and the limit lever is switched from the limit position to the yield position during contraction of two adjacent telescopic joints.

6. The telescopic boom adjusting structure according to claim 4, wherein the second end of the limit lever is connected with a guide lever, the guide lever is coaxially arranged with the limit lever, and the guide lever is penetrated through the installation housing.

7. The telescopic arm adjusting structure according to claim 4, wherein a positioning pin is penetrated in the radial direction of the limit lever, a guide groove adapted to the end of the positioning pin is configured in the mounting housing, and the end of the positioning pin is adapted to move in the guide groove during the movement of the positioning pin along with the limit lever.

8. A telescopic device comprising a plurality of telescopic joints which are sequentially sleeved, and a telescopic arm adjusting structure according to any one of claims 1 to 7, wherein the telescopic arm adjusting structure acts between adjacent telescopic joints.