CN216477146U - Propelling beam bracket structure, arm support assembly and rock drill - Google Patents

Abstract

The application provides a propulsion beam bracket structure, an arm support assembly and a rock drill, and relates to the technical field of engineering machinery. The propelling beam bracket structure comprises a propelling beam, a bracket, a rotary seat, a first driving piece and a second driving piece; the push beam is arranged on the bracket, the bracket is hinged to the rotary seat, an accommodating cavity is formed in the bracket, the first driving piece and the second driving piece are both arranged on the bracket, one of the first driving piece and the second driving piece is accommodated in the accommodating cavity, or the first driving piece and the second driving piece are both accommodated in the accommodating cavity; the first driving piece is used for driving the propelling beam to perform telescopic motion, and the second driving piece is used for driving the bracket to drive the propelling beam to perform pitching motion. The application provides a propulsion beam bracket structural configuration is reasonable, compact structure, and then reduces propulsion beam bracket structure overall dimension, in the aspect of the material, has reduced the consumption of steel, and in the aspect of the weight, is favorable to the lightweight of product.

Description

Propulsion beam bracket structure, arm support assembly and rock drill

Technical Field

The application relates to the technical field of engineering machinery, in particular to a propelling beam bracket structure, an arm support assembly and a rock drill.

Background

When the rock drill is used for tunneling, a propelling beam bracket in the arm support assembly is required to lift the propelling beam provided with the drill bit, and the arm support assembly controls the drill arm to construct towards a front area.

However, the arrangement mode of the telescopic oil cylinder and the pitching oil cylinder of the existing propelling beam bracket is unreasonable, so that the overall structure size of the propelling beam bracket is large, the overall size of the whole arm support assembly is increased, and the weight of the whole arm support assembly is increased.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a propulsion beam bracket structure, an arm support assembly and a rock drill, which are used for solving the defects in the prior art.

In order to achieve the above object, in a first aspect, the present application provides a propulsion beam bracket structure, including a propulsion beam, a bracket, a swiveling base, a first driving member and a second driving member;

the push beam is arranged on the bracket;

the bracket is hinged to the rotary seat, and an accommodating cavity is formed in the bracket;

the first driving piece and the second driving piece are arranged on the bracket, the first driving piece is used for driving the propelling beam to perform telescopic motion, and the second driving piece is used for driving the bracket to drive the propelling beam to perform pitching motion;

the first driving piece and the second driving piece are contained in the containing cavity, or the first driving piece and the second driving piece are contained in the containing cavity, and the first driving piece and the second driving piece are distributed in a mode of upper right, lower left or upper right, lower right and upper left.

With reference to the first aspect, in a possible implementation manner, the first driving member and the second driving member are linear driving members, the first driving member and the second driving member are all accommodated in the accommodating cavity, the bracket includes a U-shaped bending plate and a sealing plate, the sealing plate is disposed on the opening side of the U-shaped bending plate, and the sealing plate is provided with a hole allowing the second driving member to move.

In a possible embodiment in combination with the first aspect, the bracket sides are trapezoidal.

With reference to the first aspect, in a possible implementation manner, the first driving element and the second driving element are both linear driving elements, the first driving element is located in the accommodating cavity, and the second driving element is located on a surface of the bracket away from the push beam.

With reference to the first aspect, in a possible implementation manner, a first hinge lug and a second hinge lug are disposed on the bracket, and are respectively in hinge fit with the corresponding first driving member and the corresponding second driving member, where the first hinge lug is located in the accommodating cavity, and the second hinge lug is located on a side of the bracket away from the push beam.

With reference to the first aspect, in a possible implementation manner, the first driving element is a linear driving element, and the second driving element is a rotary driving element, wherein the first driving element is received in the receiving cavity, and the second driving element is located at a hinge joint of the bracket and the rotary seat.

In a possible embodiment in combination with the first aspect, the feed beam and the carriage are located in the same vertical plane.

In a second aspect, the present application also provides a boom assembly comprising a feed beam carrier structure as provided in the first aspect above.

With reference to the second aspect, in a possible implementation manner, the boom assembly further includes a swing mechanism and a boom seat, and the propulsion beam bracket structure is disposed on the boom seat through the swing mechanism.

In a third aspect, the present application also provides a rock drilling machine comprising a boom assembly as provided in the third aspect above.

Compare in prior art, the beneficial effect of this application:

the propelling beam bracket structure, the arm support assembly and the rock drill are characterized in that the propelling beam bracket structure is accommodated in the accommodating cavity through one of the first driving piece and the second driving piece, or the first driving piece and the second driving piece are accommodated in the accommodating cavity, and the first driving piece and the second driving piece are distributed in a mode of right upper left lower mode or right lower left upper mode; in the aspect of materials, the consumption of steel is reduced, and the weight is favorable for the light weight of products.

The pushing beam bracket structure is applied to the arm support assembly, so that the whole size of the whole arm support assembly is reduced, and the weight of the whole arm support assembly is further reduced.

Further, among the propulsion beam bracket structure that this application provided, the bracket includes that the U type bends board and shrouding, the shrouding sets up in the opening side of the U type board of bending, the U type structure of bending the board as an organic whole, reduce the welding department, simplify processing technology, welding deformation because of too many welding seams lead to has been avoided, the yield of once production improves, the probability of secondary leveling processing has been reduced, and integrative structure of bending, the wholeness is better, intensity is higher, the overall structure intensity of bracket has further been improved, the life-span of extension bracket.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, 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 partial structural schematic view of a first boom assembly provided in an embodiment of the present application;

FIG. 2 shows a cross-sectional view taken along line A-A of FIG. 1;

fig. 3 shows a front view of a bracket in the first boom assembly shown in fig. 1;

FIG. 4 shows a right side view of the bracket shown in FIG. 3;

fig. 5 is a partial schematic structural diagram of a second boom assembly provided in the embodiment of the present application;

fig. 6 is a partial schematic structural diagram of a third boom assembly provided in the embodiment of the present application;

fig. 7 shows a right side view of the third boom assembly shown in fig. 6.

Description of the main element symbols:

100-arm support assembly; 110-a pusher beam carrier structure; 111-a feed beam; 111 a-a third hinged ear panel; 112-a bracket; 1120-a containment cavity; 1121-U type bending plate; 1122-sealing plate; 1123-avoiding holes; 112 a-a first hinged ear plate; 112 b-a second hinged ear panel; 112 c-a sixth hinge ear plate; 113-a turret; 113 a-a fourth articulating ear plate; 113 b-fifth hinging ear panel; 114-a first drive member; 115-a second drive member; 120-a slewing mechanism; 121-a first slew reducer; 122-a mount; 123-a second slewing reducer; 130-arm rest.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar 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 application and are not to be construed as limiting the present application.

In the description of the present application, 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 are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

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 application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; 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 application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. 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.

Example one

Referring to fig. 1 and 5, the present embodiment provides a propulsion beam bracket structure 110 applied to a boom assembly 100 of a rock drilling machine, where the propulsion beam bracket structure 110 is used for lifting a drill boom in the boom assembly 100.

The propulsion beam bracket structure 110 provided in this embodiment includes a propulsion beam 111, a bracket 112, a swivel 113, a first driving member 114, and a second driving member 115.

The bracket 112 is hinged to the rotary base 113, that is, the bracket 112 can move along with the rotary base 113, and an accommodating cavity 1120 is arranged in the bracket 112.

The push beam 111 is disposed on the bracket 112, and the push beam 111 and the bracket 112 are in sliding fit.

The first driving member 114 and the second driving member 115 are disposed on the bracket 112, and both the first driving member 114 and the second driving member 115 can output a telescopic motion.

In this embodiment, the first driving member 114 can drive the push beam 111 to perform a telescopic motion, i.e. the first driving member 114 drives the push beam 111 to slide relative to the bracket 112. The second driving element 115 can drive the bracket 112 to drive the push beam 111 to perform a pitching motion, i.e. the second driving element 115 drives the bracket 112 to swing around the hinge with respect to the revolving base 113.

Further, at least one of the first driving member 114 and the second driving member 115 is received in the receiving cavity 1120 of the bracket 112.

It can be understood that, in the prior art, the cylinders for driving the push beam 111 to extend and retract and pitch are both disposed inside or outside the bracket 112, and the layout is not reasonable, so that a large installation space needs to be designed for installing the cylinders for driving the push beam 111 to extend and retract and pitch, which results in an increase in the size of the entire push beam bracket structure 110, and finally in an increase in the overall size of the entire boom assembly 100, thereby increasing the weight of the entire boom assembly 100.

Therefore, the propulsion beam bracket structure 110 provided in the present embodiment is received in the receiving cavity 1120 of the bracket 112 by selecting the first driving element 114 or the second driving element 115. In some embodiments, the first driving element 114 and the second driving element 115 are both received in the receiving cavity 1120 of the bracket 112, and the first driving element 114 and the second driving element 115 are distributed in a manner of upper right, lower left, or upper right.

The first driving member 114 and the second driving member 115 are reasonably arranged, so that the distance between the propelling beam 111 and the rotary seat 113 is reduced, the structure is more compact, and the overall size of the propelling beam bracket structure 110 is reduced. In terms of structure, the moment applied to the bracket 112 is reduced, mechanical faults are reduced, and the service life of the bracket 112 is further prolonged; in the aspect of materials, the material consumption is reduced, and the weight is favorable for the light weight of products. Compared with the prior art, the pushing beam bracket structure 110 is applied to the boom assembly 100, so that the overall size of the whole boom assembly 100 is reduced, the weight of the whole boom assembly 100 is reduced, the structure is more compact, the gravity center arrangement is more reasonable, and the stability of the boom assembly 100 during operation is further improved.

Example two

Referring to fig. 5, the present embodiment provides a carrier structure 110 for a feed beam, which is applied to a boom assembly 100 of a rock drilling machine. The present embodiment is an improvement on the technology of the first embodiment, and compared with the first embodiment, the difference is that:

in the present embodiment, the first driving element 114 is accommodated in the bracket 112, and the second driving element 115 is located outside the bracket 112.

One end of the first driving member 114 is hinged to the bracket 112, and the other end of the first driving member 114 is hinged to the push beam 111. One end of the second driving member 115 is hinged to the bracket 112, and the other end of the second driving member 115 is hinged to the rotary base 113.

Optionally, the first driving member 114 is a linear driving member, which may be a first telescopic cylinder, a first linear motor or a first telescopic cylinder. Specifically, in this embodiment, the first driving member 114 is selected as a first telescopic cylinder, one end of the first telescopic cylinder is hinged to the bracket 112, and the other end of the first telescopic cylinder is hinged to the push beam 111. Thus, the propulsion beam 111 can be driven to perform the telescopic motion by the telescopic motion of the first telescopic cylinder.

Optionally, the second driving member 115 is also a linear driving member, which may be selected as a second telescopic cylinder, a second linear motor or a second telescopic cylinder. Specifically, in this embodiment, the second driving member 115 is selected as a second telescopic cylinder, one end of the second telescopic cylinder is hinged to the bracket 112, and the other end of the second telescopic cylinder is hinged to the rotary base 113. Therefore, the bracket 112 can be driven to rotate around the hinge joint of the rotation seat 113 through the telescopic motion of the second telescopic oil cylinder, and then the bracket 112 drives the push beam 111 to execute the pitching motion.

Referring to fig. 2, the bracket 112 includes an upper mounting surface and a lower mounting surface opposite to each other, and a receiving cavity 1120 is formed in the bracket 112. The push beam 111 is slidably disposed on the upper mounting surface of the bracket 112, the first driving member 114 is disposed on the bracket 112 and located in the accommodating cavity 1120, and the second driving member 115 is disposed on the lower mounting surface of the bracket 112.

Optionally, the bracket 112 is a rectangular tube structure, and the accommodating cavity 1120 is formed inside the bracket 112 of the rectangular tube structure. The bracket 112 of the rectangular tube structure can be formed by bending and welding a whole steel plate.

Further, in the present embodiment, the bracket 112 is provided with a first hinge ear plate 112a and a second hinge ear plate 112b, the first hinge ear plate 112a is located on the upper wall surface of the accommodating cavity 1120 of the bracket 112, and the second hinge ear plate 112b is located on the lower mounting surface of the bracket 112. A third hinge lug plate 111a is arranged below the push beam 111, and a fourth hinge lug plate 113a is arranged on the rotary seat 113.

The first telescopic cylinder comprises a first cylinder body and a first piston rod, wherein the end part of the first cylinder body is hinged to a first hinge lug plate 112a arranged on the bracket 112, and the end part of the first piston rod is hinged to a third hinge lug plate 111a arranged on the push beam 111.

The second telescopic cylinder comprises a second cylinder body and a second piston rod, wherein the end part of the second piston rod is hinged with a second hinge lug plate 112b arranged on the bracket 112, and the end part of the second cylinder body is hinged with a fourth hinge lug plate 113a arranged on the rotary seat 113.

Further, in the prior art, the push beam 111 is located at the side of the bracket 112, which results in that the push beam 111, the bracket 112, the swing mechanism 120 and the boom seat 130 cannot be located in the same vertical plane all the time, so that the swing mechanism 120 and the boom seat 130 are subjected to a large offset moment during rock drilling operation, and mechanical failure is likely to occur during long-term operation, and the service life is shortened.

Therefore, in the present embodiment, while achieving the same purpose as the first embodiment, further, the push beam 111 is slidably disposed on the upper mounting surface of the bracket 112, which allows the push beam 111 and the bracket 112 to be maintained in the same vertical plane. When the rock drilling machine is applied to a rock drilling machine, the propelling beam 111, the bracket 112, the swing mechanism 120 and the arm support seat 130 can be positioned in the same vertical plane when the rock drilling machine works, so that the offset moment applied to the swing mechanism 120 and the arm support seat 130 is greatly reduced, the mechanical fault is reduced, and the service life is prolonged.

EXAMPLE III

Referring to fig. 1, 2, 3 and 4, the present embodiment provides a feed beam bracket structure 110 for a boom assembly 100 of a rock drilling machine. The present embodiment is an improvement made on the basis of the second embodiment, and compared with the second embodiment, the difference is that:

in the present embodiment, the first driving element 114 and the second driving element 115 are both accommodated in the bracket 112.

Specifically, the bracket 112 includes an upper mounting surface and a lower mounting surface opposite to each other, and a receiving cavity 1120 is formed in the bracket 112. The push beam 111 is slidably disposed on the upper mounting surface of the bracket 112, and the first driving member 114 and the second driving member 115 are both disposed on the bracket 112 and located in the accommodating cavity 1120, as shown in fig. 4, the first driving member 114 and the second driving member 115 are distributed in an upper right and lower left manner. Of course, in some embodiments, the first driving element 114 and the second driving element 115 may be alternatively arranged in a staggered manner from bottom to top. It will be appreciated that the arrangement described above does not affect the movement between the first drive member 114 and the second drive member 115.

As shown in fig. 2, the first driving member 114 is located at the upper left of the second driving member 115, and the first driving member 114 and the second driving member 115 are close to each other, so that the thickness H of the bracket 112 in the vertical direction is reduced, the center of gravity is lowered, the center of gravity of the entire propulsion beam bracket structure 110 is lowered, and the stability of the operation is improved.

In this embodiment, further, in this embodiment, the side surface of the bracket 112 is trapezoidal, and the bracket 112 includes a U-shaped bent plate 1121 and a sealing plate 1122, the sealing plate 1122 is welded on the opening side of the U-shaped bent plate 1121, and the sealing plate 1122 is provided with an avoiding hole 1123 allowing the second driving member 115 to move. The bracket 112 is formed by welding a single U-shaped bent plate 1121 and a sealing plate 1122, and the accommodating cavity 1120 is formed between the U-shaped bent plate 1121 and the sealing plate 1122. The welding frequency of the whole structure is reduced by adopting the integral bending forming process, the processing process is simpler, the welding deformation caused by excessive welding seams is avoided, the primary yield of the product is improved, the probability of secondary flattening processing is reduced, and the integral bending structure has better integrity and higher strength.

Referring to fig. 1, fig. 3 and fig. 4, in the present embodiment, the first driving member 114 is a first telescopic cylinder, and the second driving member 115 is a second telescopic cylinder. The bracket 112 is provided with a first hinge ear plate 112a and a second hinge ear plate 112b, the first hinge ear plate 112a is located on the upper wall surface of the accommodating cavity 1120 of the bracket 112, the second hinge ear plate 112b is located on the right end surface of the accommodating cavity 1120 of the bracket 112, the opposite side surfaces of the first hinge ear plate 112a and the second hinge ear plate 112b are close to each other, optionally, the opposite side surfaces of the first hinge ear plate 112a and the second hinge ear plate 112b can also be staggered to a certain extent, and the maximum distance of the staggering does not cause interference when the first driving member 114 and the second driving member 115 move. A third hinge lug plate 111a is arranged below the push beam 111, and a fourth hinge lug plate 113a is arranged on the rotary seat 113.

In this embodiment, the first telescopic cylinder includes a first cylinder body and a first piston rod, wherein an end of the first cylinder body is hinged to a first hinge lug 112a disposed on the bracket 112, and an end of the first piston rod is hinged to a third hinge lug 111a disposed on the push beam 111.

The second telescopic cylinder comprises a second cylinder body and a second piston rod, wherein the end of the second cylinder body is hinged to a second hinge lug plate 112b arranged on the bracket 112, and the end of the second piston rod is hinged to a fourth hinge lug plate 113a arranged on the rotary seat 113.

Example four

Referring to fig. 6 and 7, the present embodiment provides a feed beam bracket structure 110 for a boom assembly 100 of a rock drilling machine. The present embodiment is an improvement on the technology of the first embodiment, and compared with the first embodiment, the difference is that:

in this embodiment, the first driving member 114 is a first telescopic cylinder, and the first telescopic cylinder is located in the accommodating cavity 1120 of the bracket 112, and the arrangement scheme of the first telescopic cylinder may refer to the scheme in the second embodiment, which is not described herein again.

The second driver 115 is a rotary driver, which may be selected to be a motor or a rotary cylinder. In this embodiment, the second driving member 115 is a rotary cylinder, and the rotary cylinder is installed at the hinge joint of the revolving base 113 and the bracket 112. Specifically, the rotary base 113 is provided with a fifth hinge lug 113b, the bracket 112 is correspondingly provided with a sixth hinge lug 112c matched with the fifth hinge lug 113b, the rotary cylinder is installed on the fifth hinge lug 113b, and the output end of the rotary cylinder is connected with the sixth hinge lug 112c, so that the rotary cylinder outputs rotary motion to drive the bracket 112 to rotate around the hinge, and further drive the push beam 111 to perform pitching motion.

EXAMPLE five

Referring to fig. 1 and 2, the present embodiment provides a feed beam bracket structure 110 for a boom assembly 100 of a rock drilling machine. The present embodiment is an improvement on the technology of any of the above embodiments, and compared with any of the above embodiments, the difference is that:

in this embodiment, the push beam 111 is slidably disposed on the upper mounting surface of the bracket 112, the push beam 111 is located right above the bracket 112, and the push beam 111 and the bracket 112 are located in the same vertical plane.

The propulsion beam bracket structure 110 provided by the embodiment is applied to the boom assembly 100 of the rock drilling machine, and when the rock drilling machine performs rock drilling operation, the propulsion beam bracket structure 110 does not generate offset moment due to gravity and working pressure, so that the whole stress of the boom assembly 100 is stable, the structural strength design is more reasonable, the occurrence rate of mechanical faults is reduced, after-sale maintenance is reduced, and the cost is reduced.

EXAMPLE six

Referring to fig. 1 to 6, the present embodiment provides a boom assembly 100, which includes a swing mechanism 120, a boom seat 130, and a propulsion beam bracket structure 110 according to any of the above embodiments.

The rotating mechanism 120 includes a first rotating speed reducer 121, a mounting seat 122, and a second rotating speed reducer 123. The first rotary speed reducer 121 is disposed on the arm rest base 130, the second rotary speed reducer 123 is mounted on the rotary output end of the first rotary speed reducer 121 through the mounting base 122, and the rotary base 113 is mounted on the rotary output end of the second rotary speed reducer 123.

The bracket 112 of the propulsion beam bracket structure 110 is hinged to the revolving base 113 and can rotate together with the revolving base 113.

The embodiment also provides a rock drill, which comprises the arm support assembly 100 provided above.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like 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 present application. 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 application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (10)

1. A propulsion beam bracket structure is characterized by comprising a propulsion beam, a bracket, a rotary seat, a first driving piece and a second driving piece;

the push beam is arranged on the bracket;

the bracket is hinged to the rotary seat, and an accommodating cavity is formed in the bracket;

the first driving piece and the second driving piece are arranged on the bracket, the first driving piece is used for driving the propelling beam to perform telescopic motion, and the second driving piece is used for driving the bracket to drive the propelling beam to perform pitching motion;

the first driving part and the second driving part are contained in the containing cavity, or the first driving part and the second driving part are contained in the containing cavity, and the first driving part and the second driving part are distributed in a mode of upper right, lower left or upper right, lower right and upper left.

2. An advancing beam bracket structure according to claim 1, characterized in that the first driving member the second driving member are linear driving members, and the first driving member the second driving member are both accommodated in the accommodating chamber, the bracket includes a U-shaped bending plate and a sealing plate, the sealing plate is disposed on an opening side of the U-shaped bending plate, and a dodging hole allowing the second driving member to move is provided on the sealing plate.

3. A pusher beam carrier structure according to claim 2, wherein the carrier sides are trapezoidal in shape.

4. A pusher beam carrier structure according to claim 1, wherein the first drive member and the second drive member are linear drive members, the first drive member being located in the receiving cavity and the second drive member being located on a face of the carrier remote from the pusher beam.

5. A pusher beam carrier structure according to claim 4, wherein the carrier is provided with first and second hinge lugs for hingedly engaging the respective first and second drive members, the first hinge lug being located in the receiving cavity and the second hinge lug being located on a face of the carrier remote from the pusher beam.

6. A pusher beam carrier structure according to claim 1, wherein the first drive member is a linear drive member and the second drive member is a rotary drive member, wherein the first drive member is received in the receiving cavity and the second drive member is located at the hinge of the carrier and the turret.

7. A pusher beam carriage structure according to any of claims 1-6, characterised in that the pusher beam is in the same vertical plane as the carriage.

8. A boom assembly comprising a pusher beam carrier structure according to any of claims 1-7.

9. The boom assembly of claim 8, further comprising a swing mechanism and a boom base, wherein the propulsion beam bracket structure is disposed on the boom base through the swing mechanism.

10. A rock drill comprising a boom assembly according to any one of claims 8 to 9.

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