CN210343252U - Telescopic arm supporting system and drill jumbo - Google Patents

Abstract

The utility model provides a flexible arm braced system and drill jumbo, flexible arm braced system includes that the interval sets up preceding supporting mechanism and back supporting mechanism on flexible arm, and two supporting mechanisms all are equipped with the structure of adjustable clearance size, wherein set up monoblock plate-like slide in the back supporting mechanism. The telescopic boom support system of the utility model is composed of two support mechanisms with respective characteristics, thereby realizing the advantage complementation, wherein, the front support mechanism does not need to be provided with a hole on the fixed joint, thereby reducing the influence on the strength of the telescopic boom; the rear supporting mechanism does not comprise a part with a precise structure and size, so that the requirement on the machining precision can be reduced; the sliding plate arranged between the telescopic joint and the fixed joint is of an integral plate-shaped structure, so that the contact area between the sliding plate and the telescopic joint is increased, and the telescopic joint is more uniformly stressed and operates more stably when stretching back and forth on the fixed joint. The utility model also provides a drill jumbo that contains above-mentioned flexible arm braced system.

Description

Telescopic arm supporting system and drill jumbo

Technical Field

The utility model relates to an engineering machine tool field especially relates to a flexible arm braced system and use drill jumbo of this braced system.

Background

At present, a drill boom of a rock drilling rig consists of a fixed joint and a telescopic joint, wherein the telescopic joint is supported in the fixed joint through a sliding block, and in order to ensure the sliding block to support the telescopic joint without clearance and consider the abrasion of the sliding block, the height of the sliding block needs to be designed to be adjustable along the thickness direction of the drill boom.

Like an atlas retainer and a sliding block structure, the structure skillfully transmits the force of the telescopic arm of the drill boom and the rear part of the telescopic arm to the inner surface of the drill boom fixing joint through a wedge-shaped sliding block. In addition, the drill arm fixing joint does not need to be provided with a hole, so that the strength of the fixing joint is not influenced. However, the retainer needs to be inserted into a gap between the drill boom fixing section and the telescopic section, so that the requirements on the manufacturing size and the appearance of the retainer are high, the requirements on the size of the fixing section are strict, and the retainer needs to be integrally disassembled and assembled when a sliding block at the rear part of the retainer is replaced, so that the disassembly and the assembly in a construction site are very inconvenient.

For example, in the slider type of other manufacturers represented by TAMROCK, the drill boom expansion joint and the rear acting force thereof are transmitted to the drill boom fixing joint through the threaded sleeve by forming a hole in the drill boom fixing joint, welding the internal threaded sleeve and adopting the structure of the slider, the adjusting nut and the locking nut. The structure has low requirements on the size of the fixed joint, and the sliding block is easy to adjust and replace. However, since a plurality of sets of holes need to be formed at the front and the rear parts of the drill arm fixing section, the strength of the fixing section is greatly influenced, and a plurality of pasting plates need to be used for reinforcement.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flexible arm braced system enables the flexible activity of the more steady operation of flexible arm, and can reduce the processing requirement of flexible arm, reduces the intensity influence to flexible arm.

A second object of the utility model is to provide an use drill jumbo of above-mentioned braced system, the flexible activity of operation that this drill jumbo's drill boom can be more steady, and can reduce the processing requirement of drill boom, reduces the intensity influence to the drill boom.

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

a telescopic arm support system comprises a fixed joint and a telescopic joint sleeved in the fixed joint, wherein the telescopic joint can slide back and forth along the length direction of the fixed joint, and the telescopic arm support system comprises a front support mechanism and a rear support mechanism which are arranged on the telescopic arm at intervals;

the front support mechanism comprises a top adjusting assembly, a side adjusting assembly and a bottom support plate, the top adjusting assembly and the side adjusting assembly have the same structure and are respectively formed by two plates which are attached together, the outer surfaces of the two plates are respectively abutted to the fixed joint and the telescopic joint, the attachment surfaces of the two plates are provided with wedge-shaped table tops which are mutually occluded, one of the two plates is fixedly connected with an adjusting screw rod, and the adjusting screw rod is pulled along the length direction of the telescopic arm so that the two plates can be mutually separated or close to each other in the direction vertical to the plane where the two plates are located;

the rear support mechanism comprises a top support plate, side support plates, an adjusting nut and a sliding plate, the top support plate and the side support plates are respectively fixed on the top surface and the side surface of the fixed joint, the sliding plate is arranged in a gap between the fixed joint and the telescopic joint, and one surface of the sliding plate is in contact with the outer surface of the telescopic joint; through holes vertical to the planes of the top supporting plate and the side supporting plates are formed in the top supporting plate and the side supporting plates, the adjusting nuts are installed in the through holes and can move up and down along the through holes, and one ends of the adjusting nuts penetrate through the fixing joints and are abutted to the sliding plates; the slide plate is of a whole plate-shaped structure.

As a further improvement, one end of the adjusting nut, which is close to the sliding plate, is provided with a convex column, the sliding plate is provided with a limiting hole corresponding to the convex column, and the convex column is inserted into the limiting hole.

As a further improvement, a gasket is further arranged between the adjusting nut and the sliding plate, the gasket is provided with an avoiding hole aligned with the limiting hole of the sliding plate, and the convex column of the adjusting nut penetrates through the avoiding hole and is then inserted into the limiting hole of the sliding plate.

As a further improvement, a locking nut used for locking the position of the adjusting nut is further arranged in the through hole, the locking nut is positioned at one end, far away from the sliding plate, of the adjusting nut, and a structure enabling the axes of the locking nut and the adjusting nut to be aligned is arranged on the end face, adjacent to each other, of the locking nut and the adjusting nut.

As a further improvement, the rear support mechanism further comprises a nut fixing sleeve, the nut fixing sleeve is extruded in the through hole in an interference mode, an internal thread is arranged on the nut fixing sleeve, and the adjusting nut and the locking nut are connected in the nut fixing sleeve in a threaded mode.

As a further improvement, the top adjusting assembly, the side adjusting assembly and the bottom support plate are all provided with limiting pieces around for preventing the top adjusting assembly, the side adjusting assembly and the bottom support plate from moving in the installation gap, the limiting pieces comprise transverse limiting pieces and longitudinal limiting pieces, and the transverse limiting pieces are arranged at the two transverse sides of the top adjusting assembly, the side adjusting assembly and the bottom support plate and are used for preventing the top adjusting assembly, the side adjusting assembly and the bottom support plate from moving transversely; the vertical locating part sets up the vertical both sides of top regulating assembly, side regulating assembly and bottom sprag board for prevent that top regulating assembly, side regulating assembly and bottom sprag board from taking place longitudinal displacement, horizontal locating part and vertical locating part are all fixed on the fixed knot.

As a further improvement, the longitudinal position limiter comprises a rear stop block and a front limiting plate, and the rear stop block is arranged at the longitudinal rear ends of the top adjusting assembly, the side adjusting assembly and the bottom supporting plate; the front limiting plate is arranged at the longitudinal front ends of the top adjusting assembly, the side adjusting assembly and the bottom supporting plate.

As a further improvement, the front supporting mechanism further comprises a flange which is fixed on the fixed joint; the front limiting plate is fixed on the flange, and the bottom end of the front limiting plate penetrates through the fixing joint to be blocked at the front ends of the top adjusting assembly, the side adjusting assembly and the bottom supporting plate and is used for preventing the top adjusting assembly, the side adjusting assembly and the bottom supporting plate from moving forwards.

As a further improvement, the front limiting plate is provided with an avoiding hole, the adjusting screw penetrates through the avoiding hole and extends out of the outer side of the flange, the front end of the adjusting screw is provided with external threads, and double nuts are sleeved on the adjusting screw.

A rock drilling rig comprising a drill boom, the drill boom comprising a telescopic boom support system as described above.

Compared with the prior art, the utility model discloses the beneficial effect who brings does:

the telescopic boom support system of the utility model is composed of two support mechanisms with respective characteristics, thereby realizing the advantage complementation, wherein, the front support mechanism does not need to be provided with a hole on the fixed joint, thereby reducing the influence on the strength of the telescopic boom; the rear supporting mechanism does not comprise a part with a precise structure and size, so that the requirement on the machining precision can be reduced; the sliding plate arranged between the telescopic joint and the fixed joint is of an integral plate-shaped structure, so that the contact area between the sliding plate and the telescopic joint is increased, and the telescopic joint is more uniformly stressed and operates more stably when stretching back and forth on the fixed joint.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 illustrates a side view of a drill boom of a drill jumbo in accordance with a preferred embodiment of the present invention;

FIG. 2 shows a bottom view of the boom of FIG. 1;

FIG. 3 shows a cross-sectional view A-A of the drill boom of FIG. 1;

FIG. 4 shows a cross-sectional view B-B of the drill boom of FIG. 1;

FIG. 5 shows a cross-sectional view through C-C of the drill boom of FIG. 1;

fig. 6 illustrates a perspective view of the side adjustment assembly shown in fig. 4.

Description of the main element symbols:

100-a front support mechanism; 200-rear support mechanism; 1-a fixed joint; 2-a telescopic joint; 3-locking the nut; 4-adjusting the nut; 41-convex column; 5-a gasket; 6, a sliding plate; 7-anti-rotation screws; 8-a top adjustment assembly; a 9-side adjustment assembly; 11.1-a first wedge plate; 11.2-a second wedge plate; 11.3-wedge table; 11.4-adjusting the screw; 10-a lateral limit; 13-a rear stop block; 14-a flange; 15-a front limiting plate; 16-double nuts; 17.1/17.2-bottom support plate; 18.2-a limiting block; 19-a top support plate; 20-side support plates; 22-nut securing sleeve.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

For a more concrete and visual description of the present invention, the following description will be given only by taking the drill jumbo as an example, which is a preferred embodiment of the present invention.

Referring to fig. 1 and 2, fig. 1 and 2 are a side view and a bottom view (also referred to as a top view) respectively of a drill boom of a rock-drilling rig. The drill boom is arranged on the drill jumbo and comprises a fixed section 1 and an expansion section 2 (also called a drill rod), and the expansion section 2 is sleeved in the fixed section 1 and can stretch and slide back and forth along the length direction of the fixed section 1. Be equipped with on the drill jumbo the utility model discloses a telescopic boom braced system, it includes that the interval sets up preceding supporting mechanism 100 and the back supporting mechanism 200 on the drill boom, and the distance between preceding supporting mechanism 100 and the back supporting mechanism 200 depends on fixed knot 1 and the length, the weight etc. of telescopic joint 2 both, generally speaking, preceding supporting mechanism 100 sets up at fixed knot 1's preceding tip, and back supporting mechanism 200 sets up by the position a bit in the back, nevertheless can not exceed 1/2 department of fixed knot 1 length apart from preceding supporting mechanism 100.

Referring to fig. 4, the front support mechanism 100 includes a top adjustment assembly 8, a side adjustment assembly 9, and a bottom support plate 17.1. The top adjusting component 8 is arranged between the top wall of the fixed joint 1 and the top wall of the telescopic joint 2; the side adjusting component 9 is arranged between the side wall of the fixed joint 1 and the side wall of the telescopic joint 2. Because the cross section of the drill boom in the embodiment is rectangular (see fig. 3 and 4), the number of the top adjusting assemblies 8 is one, and two side adjusting assemblies 9 are respectively arranged on two sides of the telescopic boom, so as to stably support the telescopic joint 2; the bottom support plate 17.1 is arranged between the bottom wall of the fixed joint 1 and the bottom wall of the telescopic joint 2. Top adjusting part 8 and two side adjusting part 9 all have the function of adjusting the clearance size between telescopic joint 2 and the fixed knot 1, bottom sprag board 17.1 does not have regulatory function, and this bottom sprag board 17.1 both had played the effect that supports telescopic joint 2, also acted as the effect of slide simultaneously.

Referring to fig. 6, the top adjusting assembly 8 and the side adjusting assembly 9 have the same structure, taking the side adjusting assembly 9 as an example, the side adjusting assembly 9 is composed of two plates which are adhered together, the two plates are a first wedge plate 11.1 and a second wedge plate 11.2, the outer surfaces of the first wedge plate 11.1 and the second wedge plate 11.2 are respectively abutted to the fixed joint 1 and the telescopic joint 2, the adhering surfaces of the first wedge plate 11.1 and the second wedge plate 11.2 are provided with wedge table surfaces 11.3 which are mutually engaged, the front end of the first wedge plate 11.1 is fixedly connected with an adjusting screw 11.4, and the extending direction of the adjusting screw 11.4 is consistent with the length direction of the telescopic arm; due to the interaction of the wedge-shaped table surfaces 11.3, when the adjusting screw 11.4 is pulled back and forth, the first wedge-shaped plate 11.1 and the second wedge-shaped plate 11.2 can be separated from or close to each other in the direction vertical to the plane where the first wedge-shaped plate and the second wedge-shaped plate are located, so that the size of the gap between the telescopic joint 2 and the fixed joint 1 can be adjusted.

With reference to fig. 4, as a further improvement, a horizontal limiting member 10 and a vertical limiting member are disposed around the top adjusting assembly 8, the side adjusting assembly 9 and the bottom support plate 17.1, the horizontal limiting member 10 is used for preventing the top adjusting assembly 8, the side adjusting assembly 9 and the bottom support plate 17.1 from moving horizontally, the vertical limiting member is used for preventing the top adjusting assembly 8, the side adjusting assembly 9 and the bottom support plate 17.1 from moving vertically, specifically, two horizontal limiting members 10 are disposed at two horizontal sides of each of the top adjusting assembly 8, the side adjusting assembly 9 and the bottom support plate 17.1, one vertical limiting member is disposed in front of and behind each of the top adjusting assembly 8, the side adjusting assembly 9 and the bottom support plate 17.1, and all the limiting members are fixed on the fixed joint 1.

Referring to fig. 5, specifically, the front supporting mechanism 100 includes a flange 14, and the flange 14 is fixed on the fixing joint 1; the setting is in the locating part at top regulating assembly 8, side regulating assembly 9 and bottom sprag board 17.1 rear is backstop 13, sets up locating part in top regulating assembly 8, side regulating assembly 9 and bottom sprag board 17.1 the place ahead is a preceding limiting plate 15, preceding limiting plate 15 is fixed in on the flange 14, the bottom of preceding limiting plate 15 is passed fixed knot 1 and is kept off top regulating assembly 8, side regulating assembly 9 and bottom sprag board 17.1's the place ahead for prevent that top regulating assembly 8, side regulating assembly 9 and bottom sprag board 17.1 from moving forward.

Referring to fig. 5 and 6, further, an avoiding hole is formed in the front limiting plate 15, the adjusting screw 11.4 passes through the avoiding hole and extends out of the flange 14, an external thread is arranged at the front end of the adjusting screw 11.4, and a double nut 16 is sleeved on the external thread.

Referring to fig. 5, in order to ensure that the front support mechanism 100 is disposed in the gap a between the fixed joint 1 and the telescopic joint 2, it is preferable to form a hole at the front end of the fixed joint 1 for avoiding the adjusting screw 11.4 in consideration of the small gap a.

Referring to fig. 3, the rear support mechanism 200 includes a top support plate 19, a side support plate 20, an adjusting nut 4 and a sliding plate 6, the top support plate 19 and the side support plate 20 are respectively fixed on the top surface and the side surface of the fixed joint 1, the sliding plate 6 is disposed in the gap between the fixed joint 1 and the telescopic joint 2, and one surface of the sliding plate 6 contacts with the outer surface of the telescopic joint 2; through holes (not marked in the figure) vertical to the plane of the top supporting plate 19 and the side supporting plate 20 are respectively formed in the top supporting plate and the side supporting plate, the adjusting nut 4 is installed in the through holes and can move up and down along the through holes, and one end of the adjusting nut 4 penetrates through the fixed joint 1 and abuts against the sliding plate 6; slide 6 is monoblock platelike structure, the advantage that this structure brought: the whole plate-shaped structure can increase the contact area of the sliding plate 6 and the telescopic joint 2, so that the friction force acting on the friction surface in the telescopic motion process is relatively small, the sliding plate 6 and the telescopic joint 2 are not easy to damage, and the service life of the machine is prolonged; meanwhile, the contact area is increased, the telescopic motion is more stable, the control precision of drilling and boring is improved, and the boring effect is improved; the whole plate-shaped structural design makes the layout mode of the sliding plate contact with the surface of each telescopic joint 2 in a surface mode, and the whole surface is stressed more uniformly in the telescopic motion process compared with the separated multipoint stress, so that the telescopic arm acts more stably, and the service life can be prolonged.

Referring to fig. 3, as a further improvement, a convex pillar 41 is disposed at one end of the adjusting nut 4 close to the sliding plate 6, the sliding plate 6 is provided with a limiting hole (not labeled) corresponding to the convex pillar 41, and the convex pillar 41 is inserted into the limiting hole.

As a further improvement, referring to fig. 3, a spacer 5 is further disposed between the adjusting nut 4 and the sliding plate 6, the spacer 5 is provided with an avoiding hole aligned with the limiting hole of the sliding plate 6, and the convex column 41 of the adjusting nut 4 passes through the avoiding hole and is inserted into the limiting hole of the sliding plate 6. Preferably, the sliding plate 6 is provided with an accommodating groove matched with the shape of the gasket 5, and the gasket 5 is just accommodated in the accommodating groove, so that the gasket 5 cannot translate on the sliding plate 6; in order to prevent the spacer 5 from being detached from the slide plate 6, it may be fixed with a screw, or the spacer 5 may be adhered to the slide plate 6. The gasket 5 is arranged to protect the sliding plate 6, and the gasket 5 is made of a hard material and is supported between the sliding plate 6 and the adjusting nut 4, so that the contact part of the sliding plate 6 and the adjusting nut 4 cannot be deformed.

As a further improvement, referring to fig. 3, a locking nut 3 for locking the position of the adjusting nut 4 is further installed in the through hole, the locking nut 3 is located at an end of the adjusting nut 4 away from the sliding plate 6, and a structure for aligning the axes of the locking nut 3 and the adjusting nut 4 is provided on the end surface adjacent to each other. Preferably, the structure for aligning the axes of the locking nut 3 and the adjusting nut 4 comprises a boss arranged on the end surface of the adjusting nut 4 and a groove arranged on the end surface of the locking nut 3, and the boss is accommodated in the groove. It will be appreciated that the arrangement of the two elements to provide axial alignment may be other, for example, by providing a recess in the adjustment nut 4 and a projection on the locking nut 3.

Referring to fig. 3, as a further improvement, the rear supporting mechanism 200 further includes a nut fixing sleeve 22, the nut fixing sleeve 22 is pressed in the through hole in an interference manner, the nut fixing sleeve 22 is provided with an internal thread, and the adjusting nut 4 and the locking nut 3 are both connected in the nut fixing sleeve 22 in a threaded manner. The arrangement of the nut fixing sleeve 22 facilitates the assembly work: after the nut fixing sleeve 22 is processed, internal threads are turned, at the moment, the nut fixing sleeve 22 is extruded into the through holes in the top supporting plate 19 and the side supporting plates 20 in an interference fit mode, and then the locking nut 3 and the adjusting nut 4 are sequentially arranged in the nut fixing sleeve 22. Of course, if the nut holding sleeve 22 is not provided, the through holes provided in the top support plate 19 and the side support plate 20 need to be internally threaded to be screw-engaged with the lock nut 3 and the adjustment nut 4, but such a structure is not as convenient as the process for providing the nut holding sleeve 22.

Referring to fig. 3, preferably, the rear supporting mechanism 200 further includes a plurality of rotation-preventing screws 7, and the rotation-preventing screws 7 are installed between the outer wall of the nut fixing sleeve 22 and the inner wall of the through hole for preventing the nut fixing sleeve 22 from rotating.

With reference to fig. 3, the rear supporting mechanism 200 further includes a bottom supporting plate 17.2, the bottom supporting plate 17.2 is disposed between the bottom wall of the telescopic joint 2 and the bottom wall of the fixed joint 1 for supporting the telescopic joint 2, and the bottom supporting plate 17.2 also serves as a sliding plate. The periphery of the bottom supporting plate 17.2 is provided with a limiting block 18.2 for preventing the bottom supporting plate from moving.

It should be noted that the above drill jumbo is only a preferred embodiment of the present invention, but it is not difficult to understand that the present invention discloses a telescopic arm support system not only applied herein, but also all having a telescopic arm structure that is "the telescopic arm structure can be telescopic and the telescopic arm support system can be applied to realize the purpose of the present invention.

To sum up, the telescopic boom support system of the present invention is composed of two support mechanisms with respective features, thereby realizing advantage complementation, wherein the front support mechanism 100 does not need to open a hole on the fixed joint 1, thereby reducing the influence on the strength of the telescopic boom; the rear support mechanism 200 does not include components with precise structural dimensions, so that the requirement on machining precision can be reduced; and the sliding plate 6 arranged between the telescopic joint 2 and the fixed joint 1 is of an integral plate-shaped structure, so that the contact area between the sliding plate 6 and the telescopic joint 2 is increased, and the telescopic joint 2 is stressed more uniformly and operates more stably when stretching back and forth on the fixed joint 1.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. The utility model provides a flexible arm braced system, flexible arm includes telescopic joint (2) of fixed knot (1) and suit in fixed knot (1), and telescopic joint (2) can make a round trip to slide its characterized in that along fixed knot (1) length direction: comprises a front supporting mechanism (100) and a rear supporting mechanism (200) which are arranged on a telescopic arm at intervals;

the front supporting mechanism (100) comprises a top adjusting component (8), a side adjusting component (9) and a bottom supporting plate (17.1), the top adjusting component (8) and the side adjusting component (9) have the same structure and are respectively formed by two plates which are attached together, the outer surfaces of the two plates are respectively abutted against the fixed joint (1) and the telescopic joint (2), the attachment surfaces of the two plates are provided with wedge-shaped table tops (11.3) which are mutually engaged, one of the two plates is fixedly connected with an adjusting screw rod (11.4), and the adjusting screw rod (11.4) is pulled along the length direction of the telescopic arm, so that the two plates can be mutually separated or close to each other in the direction vertical to the plane where the two plates are located;

the rear supporting mechanism (200) comprises a top supporting plate (19), a side supporting plate (20), an adjusting nut (4) and a sliding plate (6), the top supporting plate (19) and the side supporting plate (20) are respectively fixed on the top surface and the side surface of the fixed joint (1), the sliding plate (6) is arranged in a gap between the fixed joint (1) and the telescopic joint (2), and one surface of the sliding plate (6) is in contact with the outer surface of the telescopic joint (2); through holes vertical to the plane of the top supporting plate (19) and the side supporting plate (20) are formed in the top supporting plate and the side supporting plate, the adjusting nut (4) is installed in the through holes and can move up and down along the through holes, and one end of the adjusting nut (4) penetrates through the fixing joint (1) and abuts against the sliding plate (6); the sliding plate (6) is of a whole plate-shaped structure.

2. The telescopic arm support system of claim 1, wherein: one end of the adjusting nut (4) close to the sliding plate (6) is provided with a convex column (41), the sliding plate (6) is provided with a limiting hole corresponding to the convex column (41), and the convex column (41) is inserted into the limiting hole.

3. The telescopic arm support system of claim 2, wherein: still be equipped with gasket (5) between adjusting nut (4) and slide (6), gasket (5) be equipped with the spacing hole of slide (6) is aligned dodge the hole, the projection of adjusting nut (4) passes dodge the hole and then inserts in the spacing downthehole of slide (6).

4. The telescopic arm support system of claim 1, wherein: and a locking nut (3) used for locking the position of the adjusting nut (4) is further arranged in the through hole, the locking nut (3) is positioned at one end, far away from the sliding plate (6), of the adjusting nut (4), and a structure for aligning the axes of the locking nut (3) and the adjusting nut (4) is arranged on the adjacent end faces of the locking nut (3) and the adjusting nut (4).

5. The telescopic arm support system of claim 4, wherein: rear support mechanism (200) still include the fixed cover of nut (22), the fixed cover of nut (22) interference extrusion in the through-hole, and the fixed cover of nut (22) is equipped with the internal thread, the equal threaded connection of adjusting nut (4) and lock nut (3) is in the fixed cover of nut (22).

6. The telescopic arm support system of claim 1, wherein: limiting parts for preventing the top adjusting component (8), the side adjusting component (9) and the bottom supporting plate (17.1) from displacing in an installation gap are arranged on the periphery of the top adjusting component (8), the side adjusting component (9) and the bottom supporting plate (17.1), each limiting part comprises a transverse limiting part and a longitudinal limiting part, and the transverse limiting parts (10) are arranged on the two transverse sides of the top adjusting component (8), the side adjusting component (9) and the bottom supporting plate (17.1) and used for preventing the top adjusting component (8), the side adjusting component (9) and the bottom supporting plate (17.1) from displacing transversely; the vertical locating part sets up top regulating assembly (8), side regulating assembly (9) and bottom sprag board (17.1) vertical both sides for prevent that top regulating assembly (8), side regulating assembly (9) and bottom sprag board (17.1) from taking place vertical displacement, horizontal locating part (10) and vertical locating part are all fixed on fixed knot (1).

7. The telescopic arm support system of claim 6, wherein: the longitudinal limiting piece comprises a rear stop block (13) and a front limiting plate (15), and the rear stop block (13) is arranged at the longitudinal rear ends of the top adjusting component (8), the side adjusting component (9) and the bottom supporting plate (17.1); the front limiting plate is arranged at the longitudinal front end of the top adjusting component (8), the side adjusting component (9) and the bottom supporting plate (17.1).

8. The telescopic arm support system of claim 7, wherein: the front supporting mechanism (100) further comprises a flange (14), and the flange (14) is fixed on the fixed joint (1); the front limiting plate (15) is fixed on the flange (14), and the bottom end of the front limiting plate (15) penetrates through the fixed joint (1) to be blocked at the front ends of the top adjusting component (8), the side adjusting component (9) and the bottom supporting plate (17.1) and is used for preventing the top adjusting component (8), the side adjusting component (9) and the bottom supporting plate (17.1) from moving forwards.

9. The telescopic arm support system of claim 8, wherein: the front limiting plate (15) is provided with an avoiding hole, the adjusting screw (11.4) penetrates through the avoiding hole and extends out of the outer side of the flange (14), the front end of the adjusting screw (11.4) is provided with external threads, and the adjusting screw is sleeved with double nuts (16).

10. A rock drilling rig comprising a drill boom, characterized in that: the drill boom comprising a telescopic boom support system according to any of claims 1 to 9.

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