Centrifugal swing arm railway box girder anchor hole chiseling machine

Abstract

The cam is connected to the bottom plate of the tool holder through a linking means which is arranged on the cam side of the tool holder, and the ...

Description

Technical Field

[0001] The invention relates to a roughening device for roughening holes of railway box beams, belonging to the field of concrete processing tools. Background Art

[0002] The proportion of bridges in my country's railway construction is very large, most of which are standard span simply supported beam bridges. These bridges require the manufacture of a large number of railway prefabricated box girders during construction. In the manufacture of railway prefabricated box girders, after demoulding, concrete pouring needs to go through tensioning, grouting, anchor hole sealing and other processes, among which anchor hole sealing plays a vital role in the service life of the bridge in the later period.

[0003] When the anchor hole is plugged, since the beam body has been tensioned, the inner wall of the anchor hole is dry and smooth, and the new concrete filled is not easy to fully bond with the beam body, so it is easy to have voids and shrinkage, resulting in cracks. Therefore, before plugging the anchor hole, the inner wall needs to be roughened.

[0004] Existing roughening tools, such as a beam end anchor hole roughening tool disclosed in Chinese patent publication number CN211518096U, have a principle of roughening by driving a motor to drive a striking blade to impact the concrete surface of the anchor hole at high speed to achieve the purpose of roughening. However, the blades have the same size and cannot roughen the annular rubber sleeve groove in the box beam anchor hole, so the roughening effect is not thorough. Summary of the invention

[0005] An object of the present invention is to provide a centrifugal swing arm railway box girder anchor hole chiseling device with improved chiseling effect, so as to solve the problems of incomplete box girder grinding and difficult quality control in the prior art.

[0006] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0007] A centrifugal swing arm railway box girder anchor hole chiseling device, comprising:

[0008] A power assembly having an output end for outputting rotational power;

[0009] A chiseling tool holder is installed at the output end and driven to rotate by the power assembly; the chiseling tool holder comprises a tool holder connecting plate, a lower support plate of the tool holder and an upper support plate of the tool holder; the tool holder connecting plate is fixedly connected to the output end; the lower support plate of the tool holder is fixedly connected to one side of the tool holder connecting plate in the axial direction, and the tool holder connecting plate and the lower support plate of the tool holder are fixedly connected by a plurality of first connecting pillars arranged in parallel in the circumferential direction; the upper support plate of the tool holder is connected to a side of the lower support plate of the tool holder away from the tool holder connecting plate; the upper support plate of the tool holder and the lower support plate of the tool holder are fixedly connected by a plurality of second connecting pillars arranged in parallel in the circumferential direction;

[0010] The haircutting swing arm body comprises a swing arm and a haircutting head; one end of the swing arm is rotatably mounted on a second connecting pillar, and the other end is mounted with the haircutting head; a plurality of haircutting protrusions are distributed on the haircutting head; the haircutting protrusions rotate and swing outward around the second connecting pillar when the haircutting tool holder rotates.

[0011] As a preferred embodiment, a biasing elastic member is further provided on the haircutting tool holder; the biasing elastic member is used to apply a biasing force to the haircutting swing arm body to make it rotate inward.

[0012] As a preferred embodiment, a first limiting column is further provided between the lower support plate of the tool holder and the upper support plate of the tool holder; the outer diameter of the axis of the first limiting column is greater than the outer diameter of the axis of the second connecting column; the first limiting column is located on the other side of the second connecting column relative to the chiseling head;

[0013] The biasing elastic member includes a torsion spring sleeved outside the second connecting pillar; one end of the torsion spring is limited by the first limiting column, and the other end is limited by the swing arm, applying a biasing force to the swing arm to cause it to rotate inward; the outer wall surface of the swing arm has a limiting surface for contacting and limiting with the first limiting column.

[0014] As a preferred embodiment, the lower support plate of the tool holder is a circular ring plate; the upper support plate of the tool holder is a ring plate, and the outer edge of the upper support plate of the tool holder has a plurality of accommodating grooves arranged along the circumferential direction;

[0015] The swing arm comprises a connecting plate end connected to the second connecting pillar, and a clamping head end connected to the chiseling head; the connecting plate end is sleeved on the lower support plate and the upper support plate of the tool holder, and the torsion spring is sleeved outside the second connecting pillar and is located below the connecting plate end; the clamping head end comprises an upper clamping plate and a lower clamping plate opposite to each other in the axial direction, and the chiseling head is rotatably clamped between the upper clamping plate and the lower clamping plate; relative to the lower support plate of the tool holder, the upper clamping plate is at the same height as the upper support plate of the tool holder; in a stationary state, the torsion spring accommodates the clamping head end in the accommodating groove.

[0016] As a preferred embodiment, a second limiting column is further provided between the lower support plate of the tool holder and the upper support plate of the tool holder; the second limiting column is located on the inner side of the swing arm; when the swing arm contacts and limits the second limiting column, the clamping head end is accommodated in the accommodating groove, and the upper clamping plate and the bottom wall of the accommodating groove do not contact each other.

[0017] As a preferred embodiment, the power assembly includes a hydraulic motor and a connecting frame for mounting the hydraulic motor; the connecting frame includes a quick-connect flange plate, a support rod, and an upper connecting plate supporting the bottom of the hydraulic motor; a plurality of support rods are arranged in parallel along the circumferential direction and fixedly connected between the upper connecting plate and the quick-connect flange plate; the upper connecting plate is fixedly connected to the outside of a bearing sleeve; a support bearing is provided between the bearing sleeve and the output end.

[0018] As a preferred embodiment, the output end includes a motor output shaft; a support bearing is provided between the bearing sleeve and the motor output shaft; the motor output shaft is fixedly connected to the tool holder connecting plate downstream of the support bearing along the power output direction.

[0019] As a preferred embodiment, the centrifugal swing arm railway box girder anchor hole chiseling tool also includes a dust cover; the dust cover is arranged around the tool holder connecting plate and the upper connecting plate, and is fixedly connected to the upper connecting plate.

[0020] As a preferred embodiment, the diameter of the first connecting strut is greater than the diameter of the second connecting strut; the first connecting strut and the second connecting strut are coaxially arranged.

[0021] As a preferred embodiment, the dust cover is made of rubber material and is provided with a connection hole for an external vacuum cleaner; the upper connecting plate and the lower connecting plate have protrusions protruding radially outward; a plurality of protrusions are arranged circumferentially and arranged one by one in the axial direction, and the support rod is connected between two axially opposite protrusions; the quick-connect flange plate is a steel plate with a plurality of bolt holes.

[0022] The beneficial effects of the present invention are

[0023] (1) The present invention provides a centrifugal swing arm railway box girder anchor hole chiseling device, which can be connected to a mechanical arm through a flange provided by a quick-connect flange plate, and is easy and quick to install.

[0024] (2) The centrifugal swing arm railway box girder anchor hole chiseling device drives the chiseling swing arm body to rotate at high speed through the drive of the hydraulic motor, so as to realize the chiseling of concrete at any position within a certain range, thereby realizing the chiseling of the inner wall of the anchor hole without dead angles.

[0025] With reference to the following description and the accompanying drawings, the specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope thereby.

[0026] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0027] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 It is a three-dimensional schematic diagram of a centrifugal swing arm railway box girder anchor hole chiseling device provided by an embodiment of the present disclosure;

[0030] Figure 2 yes Figure 1 A three-dimensional schematic diagram after removing the dust cover;

[0031] Figure 3 yes Figure 1 A top view of

[0032] Figure 4 yes Figure 1 Detail of the chiseled swing arm body;

[0033] Figure 5 yes Figure 1 A front view of

[0034] Figure 6 yes Figure 5 AA cross-section diagram.

[0035] In the figure, 1, connecting frame; 11, quick-connect flange plate; 12, support rod; 13, upper connecting plate; 14, bearing sleeve; 15, bearing;

[0036] 2. Hydraulic motor; 21. Output shaft; 22. Upper connecting sleeve;

[0037] 3. Dust cover;

[0038] 4. Chiseling swing arm body; 40. Swing arm; 41. Connecting plate end; 42. Clamping head end; 421. Upper clamping plate; 422. Lower clamping plate; 43. Connecting shaft; 45. Chiseling head; 48. Torsion spring;

[0039] 5. Chiseling tool holder; 50. Tool holder connecting plate; 51. Tool holder lower support plate; 52. Tool holder upper support plate; 521. Accommodating groove; 53. First connecting support column; 54. Second connecting support column; 55. First limiting column; 56. Second limiting column. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0041] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be another element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be another element centered thereon at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0043] like Figures 1 to 6 As shown, an embodiment of the present disclosure provides a centrifugal swing arm railway box girder anchor hole chiseling device, comprising: a power assembly, a chiseling tool holder 5, and a chiseling swing arm body 4.

[0044] The power assembly has an output end for outputting rotational power. Specifically, the power assembly includes a hydraulic motor 2 and a connecting frame 1 for mounting the hydraulic motor 2. The hydraulic motor 2 is fixed to the connecting frame 1 by bolt connection. The connecting frame 1 includes a quick-connect flange plate 11, a support rod 12, and an upper connecting plate 13 supporting the bottom of the hydraulic motor 2; a plurality of support rods 12 are arranged in parallel along the circumferential direction and fixedly connected between the upper connecting plate 13 and the quick-connect flange plate 11; the upper connecting plate 13 is fixedly connected to a bearing sleeve 14; a support bearing 15 is provided between the bearing sleeve 14 and the output end (21). The output end includes a motor output shaft 21. A support bearing 15 is provided between the bearing sleeve 14 and the motor output shaft 21.

[0045] The upper connecting plate 13 and the quick-connect flange plate 11 are coaxially arranged, and both have substantially the same shape, and both have protrusions 131 protruding radially outward. Multiple protrusions 131 are arranged circumferentially and arranged one by one in the axial direction, and the support rod 12 is connected between two axially opposite protrusions 131. The quick-connect flange plate 11 is a steel plate with multiple bolt holes.

[0046] The chiseling tool holder 5 is installed at the output end and is driven to rotate by the power assembly. The chiseling tool holder 5 is coaxially arranged with the output end. The chiseling tool holder 5 and the output shaft 21 are fixedly connected by an upper connecting sleeve 22. The chiseling tool holder 5 includes a tool holder connecting plate 50, a tool holder lower support plate 51, and a tool holder upper support plate 52. The tool holder connecting plate 50 is fixedly connected to the output end (21). The tool holder connecting plate 50 is a steel plate with a plurality of bolt holes, and a center hole is provided in the center thereof to be connected to the hydraulic motor 2. The rotation of the output shaft 21 of the hydraulic motor 2 drives the overall rotation of the chiseling tool holder 5.

[0047] The lower support plate 51 of the tool holder is fixedly connected to one side of the tool holder connecting plate 50 along the axial direction (facing the Figure 1 The tool holder connecting plate 50 and the tool holder lower support plate 51 are fixedly connected by a plurality of first connecting struts 53 arranged in parallel in the circumferential direction; the tool holder upper support plate 52 is connected to the side of the tool holder lower support plate 51 away from the tool holder connecting plate 50. The motor output shaft 21 is fixedly connected to the tool holder connecting plate 50 downstream of the support bearing 15 along the power output direction.

[0048] The upper support plate 52 of the tool holder and the lower support plate 51 of the tool holder are fixedly connected by a plurality of second connecting pillars 54 arranged in parallel in the circumferential direction. In order to transmit the rotation more stably, the diameter of the first connecting pillar 53 is larger than the diameter of the second connecting pillar 54. Specifically, the first connecting pillar 53 and the second connecting pillar 54 are coaxially arranged. The first connecting pillar 53 and the second connecting pillar 54 are an integral structure, and the second connecting pillar 54 is located at the upper end of the first connecting pillar 53. The first connecting pillar 53 has a larger diameter to better drive the haircutting body formed by the upper support plate 52 of the tool holder and the lower support plate 51 of the tool holder. The number of the second connecting pillars 54 is the same as the number of the first connecting pillars 53, and accordingly, the number of the haircutting swing arm bodies 4 is equal to the number of the second connecting pillars 54.

[0049] In this embodiment, the haircutting swing arm body 4 includes a swing arm 40 and a haircutting head 45. One end (41) of the swing arm 40 is rotatably mounted on the second connecting support 54, and the other end (42) is mounted with the haircutting head 45. The second connecting support 54 not only serves as a connecting component between the upper support plate 52 of the tool holder and the lower support plate 51 of the tool holder, providing connecting support for the two support plates, but also serves as a pivot axis of the haircutting swing arm body 4, providing rotation support for the centrifugal swing of the haircutting swing arm body 4, which avoids adding other pivot axes between the upper support plate 52 of the tool holder and the lower support plate 51 of the tool holder and making additional holes on the upper support plate 52 of the tool holder and the lower support plate 51 of the tool holder, resulting in a decrease in structural strength, and can also improve the integration of the structure.

[0050] The chiseling head 45 is provided with a plurality of chiseling protrusions. The chiseling protrusions are of a conical structure. Preferably, the chiseling head 45 is of a rigid structure so as to have sufficient strength for chiseling. A plurality of circles of chiseling protrusions are evenly arranged on the side wall of the chiseling head 45. The chiseling protrusions rotate and swing outward around the second connecting pillar 54 when the chiseling tool holder 5 rotates.

[0051] The chiseling tool holder 5 is also provided with a biasing elastic member. The biasing elastic member is used to apply a biasing force to the chiseling swing arm body 4 to rotate it inward. A first limiting column 55 is also provided between the tool holder lower support plate 51 and the tool holder upper support plate 52. The first limiting column 55 is located on the outer side of the offset radial direction of the second connecting support column 54. The outer diameter of the axis of the first limiting column 55 is greater than the outer diameter of the axis of the second connecting support column 54. The first limiting column 55 is located on the other side of the second connecting support column 54 relative to the chiseling head 45. The first limiting column 55 limits the outermost position of the clamping head end 42.

[0052] The chiseling swing arm body 4 of the centrifugal swing arm railway box girder anchor hole chiseling device forms a knife-flipping structure when rotating. During the rotation, the chiseling head 45 is opened by the centrifugal force of the rotation, and is also subjected to the reaction force of the anchor hole wall or the protrusion on the wall during the chiseling process, so that scraping and chiseling are formed during the rotation process, and further, intermittent centrifugal swing is formed, which makes it easier to form chiseling and improves the efficiency of rough wall generation.

[0053] exist Figure 3 In the embodiment, the chiseling head 45 faces clockwise, and the rotation direction of the chiseling tool holder 5 is opposite to the direction of the chiseling head 45. The axial length of the chiseling head 45 is smaller than the axial spacing between the upper support plate 52 of the tool holder and the lower support plate 51 of the tool holder, and part of the chiseling head 45 can be accommodated between the upper support plate 52 of the tool holder and the lower support plate 51 of the tool holder in the initial position, so as to avoid interfering with the reset of the entire chiseling swing arm body 4.

[0054] Specifically, the first connecting support 53 is a steel rod, and the tool holder connecting plate 50 and the tool holder lower support plate 51 are connected by threads at both ends. The tool holder lower support plate 51 is a steel plate with multiple bolt holes. The second connecting support 54 is a steel rod, and the tool holder lower support plate 51 and the tool holder upper support plate 52 are connected by threads at both ends.

[0055] The biasing elastic member includes a torsion spring 48 sleeved outside the second connecting pillar 54. One end of the torsion spring 48 is limited by the first limiting column 55, and the other end is limited by the swing arm 40, applying a biasing force to the swing arm 40 to make it rotate inward; the outer wall surface of the swing arm 40 has a limiting surface for contacting and limiting with the first limiting column 55. The limiting surface can be a single plane, or a folded surface composed of two adjacent planes.

[0056] The first limit post 55 limits the maximum swing amplitude (angle) of the haircutting swing arm body 4 to less than 90 degrees, so as to avoid excessive swinging during haircutting and difficulty in resetting. Furthermore, the maximum swing amplitude (angle) of the haircutting swing arm body 4 is less than 75 degrees. When the haircutting swing arm body 4 contacts and limits the first limit post 55 (at the outermost position), the haircutting swing arm body 4 is still located on the counterclockwise side of the second connecting pillar 54 (or the straight line passing through the diameter of the second connecting pillar 54), and the outermost position and the innermost position of the haircutting swing arm body 4 are both located on the same side of the second connecting pillar 54.

[0057] Furthermore, the position of the first limit column 55 is adjustable to change the outermost position of the roughening swing arm body 4, that is, to change the maximum swing amplitude position of the roughening swing arm body 4. The two ends of the first limit column 55 can extend out of the upper support plate 52 of the tool holder and the lower support plate 51 of the tool holder respectively, and are connected by nuts, thereby fixing and pressing on the upper support plate 52 of the tool holder and the lower support plate 51 of the tool holder to achieve positioning. The upper support plate 52 of the tool holder and the lower support plate 51 of the tool holder are provided with long holes of the same shape relative to each other, or a plurality of relatively dispersed connecting holes. The first limit column 55 is positioned at different positions of the long hole, or connected to connecting holes at different positions, so that the position of the first limit column 55 is adjustable, thereby achieving that the roughening swing arm body 4 can roughen and grind any concrete surface within the amplitude limited by the first limit column 55.

[0058] The lower support plate 51 of the tool holder is a circular plate. The upper support plate 52 of the tool holder is a circular plate, and the outer edge of the upper support plate 52 of the tool holder has a plurality of accommodating grooves 521 arranged along the circumferential direction. The shape of the accommodating grooves 521 is roughly matched with the shape of the upper clamping plate 421. The plurality of accommodating grooves 521 are evenly arranged along the circumferential direction.

[0059] The swing arm 40 has a connecting plate end 41 connected to the second connecting support 54, and a clamping head end 42 connected to the chiseling head 45. The connecting plate end 41 is sleeved on the lower support plate 51 of the tool holder and the upper support plate 52 of the tool holder, and the torsion spring 48 is sleeved outside the second connecting support 54 and is located below the connecting plate end 41. The clamping head end 42 has an upper clamping plate 421 and a lower clamping plate 422 that are opposite to each other in the axial direction. The weight of the clamping head end 42 is greater than the weight of the connecting plate end 41, so as to better swing out for chiseling. The chiseling head 45 is rotatably clamped between the upper clamping plate 421 and the lower clamping plate 422. Relative to the lower support plate 51 of the tool holder, the upper clamping plate 421 has the same height as the upper support plate 52 of the tool holder. In a static state, the torsion spring 48 accommodates the clamping head end 42 in the accommodating groove 521.

[0060] A second limiting column 56 is also provided between the lower support plate 51 of the tool holder and the upper support plate 52 of the tool holder. The second limiting column 56 is located on the inner side of the swing arm 40. The second connecting pillar 54 is connected to the lower support plate 51 of the tool holder and the upper support plate 52 of the tool holder by threads with the first limiting column 55 and the second limiting column 56. When the swing arm 40 contacts and limits with the second limiting column 56, the clamping head end 42 is accommodated in the accommodating groove 521, and the upper clamping plate 421 does not contact the bottom wall of the accommodating groove 521. The first limiting column 55 and the second limiting column 56 are used for internal and external limiting.

[0061] Of course, in a feasible embodiment, the first limiting column 55 can also limit the innermost position of the clamping head end 42. When the swing arm 40 rotates inward, the portion of the connecting plate end 41 located on the side of the second connecting support 54 away from the chiseling head 45 forms a contact limit with the first limiting column 55. When the clamping head end 42 is at the outermost position, the portion of the swing arm 40 located on the same side of the chiseling head 45 forms a contact limit with the first limiting column 55.

[0062] The centrifugal swing arm railway box girder anchor hole chiseling tool further comprises a dust cover 3. The dust cover 3 is arranged around the tool holder connecting plate 50 and the upper connecting plate 13, and is fixedly connected to the upper connecting plate 13. The dust cover 3 is made of rubber and is provided with a connection hole for an external vacuum cleaner.

[0063] In a feasible embodiment, the chiseling tool holder 5 is eccentrically mounted on the output shaft of the hydraulic motor 2 to form an eccentric wheel or cam structure, thereby not only providing rotational power for the chiseling swing arm body 4 during rotation, but also causing the chiseling tool holder 5 to form an eccentric rotation, so that the chiseling swing arm body 4 thereon is subjected to constantly changing centrifugal force, providing changing alternating loads during the chiseling process, thereby improving the chiseling efficiency.

[0064] When in use, the centrifugal swing arm railway box girder anchor hole chiseling device is connected to an external mechanical arm and a vacuum cleaner, and the machine is started. The centrifugal swing arm railway box girder anchor hole chiseling device is inserted into the anchor hole through the external mechanical arm. The chiseling head 45 of the chiseling swing arm body 4 strikes the concrete surface of the anchor hole at high speed to achieve chiseling. At this time, the hydraulic motor 2 drives the chiseling tool holder 5 to rotate rapidly, and the centrifugal force on the chiseling swing arm body 4 is greater than the biasing force of the torsion spring 48 and is thrown out, driving the chiseling head 45 to strike the concrete surface in the anchor hole at high speed to achieve the purpose of chiseling. Finally, the chiseling device is driven by the mechanical arm to slowly move out of the anchor hole at the same time, so as to achieve chiseling of the entire range of the anchor hole.

[0065] As for the position of the chiseling swing arm 40, the range of the chiseling swing arm body 4 is limited by the first limit column 55 during the high-speed rotation of the chiseling tool holder 5, and can only reach a certain range. The chiseling swing arm body 4 can chisel and grind any concrete surface within the range limited by the first limit column 55 and the second limit column 56. After the hydraulic motor 2 stops, the centrifugal force disappears, and the concrete is collected in the chiseling tool holder 5 due to the pressure of the torsion spring 48.

[0066] Any numerical value cited herein includes all values ​​of lower and upper values ​​that increase by one unit from the lower limit to the upper limit, and there is at least a two-unit interval between any lower value and any higher value. For example, if the value of the quantity of a component or a process variable (such as temperature, pressure, time, etc.) is set forth to be from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, the purpose is to illustrate that values ​​such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also explicitly listed in the specification. For values ​​less than 1, one unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1. These are merely examples that are intended to be clearly expressed, and it can be considered that all possible combinations of numerical values ​​listed between the lowest value and the highest value are clearly set forth in the specification in a similar manner.

[0067] Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. "About" or "approximately" used with a range applies to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30", including at least the specified endpoints.

[0068] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for all purposes. The term "consisting essentially of..." to describe a combination should include the identified elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe a combination of elements, ingredients, parts or steps herein also contemplates embodiments that consist essentially of these elements, ingredients, parts or steps. By using the term "may", it is intended to indicate that any attribute described that "may" include is optional.

[0069] Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "an" used to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.

[0070] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but should be determined with reference to the appended claims and the full scope of equivalents possessed by such claims. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to be a waiver of the subject matter, nor should it be considered that the inventors did not consider the subject matter to be part of the disclosed inventive subject matter.

Claims

1. A centrifugal swing arm railway box girder anchor hole chiseling device, characterized in that: include: A power assembly having an output end for outputting rotational power; A chiseling tool holder is installed at the output end and driven to rotate by the power assembly; the chiseling tool holder comprises a tool holder connecting plate, a lower support plate of the tool holder and an upper support plate of the tool holder; the tool holder connecting plate is fixedly connected to the output end; the lower support plate of the tool holder is fixedly connected to one side of the tool holder connecting plate in the axial direction, and the tool holder connecting plate and the lower support plate of the tool holder are fixedly connected by a plurality of first connecting pillars arranged in parallel in the circumferential direction; the upper support plate of the tool holder is connected to a side of the lower support plate of the tool holder away from the tool holder connecting plate; the upper support plate of the tool holder and the lower support plate of the tool holder are fixedly connected by a plurality of second connecting pillars arranged in parallel in the circumferential direction; The haircutting swing arm body comprises a swing arm and a haircutting head; one end of the swing arm is rotatably sleeved on the second connecting pillar, and the other end is mounted with the haircutting head; a plurality of haircutting protrusions are distributed on the haircutting head; the haircutting protrusions rotate and swing outward around the second connecting pillar when the haircutting tool holder rotates; The power assembly includes a hydraulic motor and a connecting frame for mounting the hydraulic motor; the haircutting tool holder is eccentrically mounted on the output shaft of the hydraulic motor, thereby providing rotational power to the haircutting swing arm body during rotation, so that the haircutting tool holder forms an eccentric rotation; The chiseling tool holder is also provided with a biasing elastic member; the biasing elastic member is used to apply a biasing force to the chiseling swing arm body to make it rotate inward; a first limiting column is also provided between the lower support plate of the tool holder and the upper support plate of the tool holder; the outer diameter of the axis of the first limiting column is greater than the outer diameter of the axis of the second connecting column; the first limiting column is located on the other side of the second connecting column relative to the chiseling head; The biasing elastic member comprises a torsion spring sleeved outside the second connecting support; one end of the torsion spring is limited by the first limiting column, and the other end is limited by the swing arm, applying a biasing force to the swing arm to make it rotate inward; the outer wall surface of the swing arm has a limiting surface for contacting and limiting with the first limiting column; The lower support plate of the tool holder is a circular ring plate; the upper support plate of the tool holder is a ring plate, and the outer edge of the upper support plate of the tool holder has a plurality of accommodating grooves arranged along the circumferential direction; The swing arm comprises a connecting plate end connected to the second connecting pillar, and a clamping head end connected to the chiseling head; the connecting plate end is sleeved on the lower support plate of the tool holder and the upper support plate of the tool holder, and the torsion spring is sleeved outside the second connecting pillar and is located below the connecting plate end; the clamping head end comprises an upper clamping plate and a lower clamping plate opposite to each other in the axial direction, and the chiseling head is rotatably clamped between the upper clamping plate and the lower clamping plate; relative to the lower support plate of the tool holder, the upper clamping plate and the upper support plate of the tool holder have the same height; in a static state, the torsion spring accommodates the clamping head end in the accommodating groove; A second limiting column is also provided between the lower support plate of the tool holder and the upper support plate of the tool holder; the second limiting column is located on the inner side of the swing arm; when the swing arm contacts and limits the second limiting column, the clamping head end is accommodated in the accommodating groove, and the upper clamping plate and the bottom wall of the accommodating groove do not contact each other.

2. The centrifugal swing arm railway box girder anchor hole chiseling device as claimed in claim 1, characterized in that: The connecting frame includes a quick-connect flange plate, a support rod, and an upper connecting plate supporting the bottom of the hydraulic motor; a plurality of support rods are arranged in parallel along the circumferential direction and fixedly connected between the upper connecting plate and the quick-connect flange plate; the upper connecting plate is fixedly connected to the outside of a bearing sleeve; a support bearing is provided between the bearing sleeve and the output end.

3. The centrifugal swing arm railway box girder anchor hole chiseling device as claimed in claim 2, characterized in that: The output end includes a motor output shaft; a support bearing is provided between the bearing sleeve and the motor output shaft; the motor output shaft is fixedly connected to the tool holder connecting plate downstream of the support bearing along the power output direction.

4. The centrifugal swing arm railway box girder anchor hole chiseling device as claimed in claim 2, characterized in that: It also includes a dust cover; the dust cover is arranged around the tool holder connecting plate and the upper connecting plate, and is fixedly connected to the upper connecting plate.

5. The centrifugal swing arm railway box girder anchor hole chiseling device as claimed in claim 4, characterized in that: The diameter of the first connecting strut is greater than the diameter of the second connecting strut; the first connecting strut and the second connecting strut are coaxially arranged.

6. The centrifugal swing arm railway box girder anchor hole chiseling device as claimed in claim 5, characterized in that: The dust cover is made of rubber and is provided with a connection hole for an external vacuum cleaner; the upper connecting plate and the quick-connect flange plate have protrusions that protrude radially outward; a plurality of protrusions are arranged circumferentially and arranged one by one in the axial direction, and the support rod is connected between two axially opposite protrusions; the quick-connect flange plate is a steel plate with a plurality of bolt holes.

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