Connection structure of cutting head and cutting arm, cutting portion, and working machine

Abstract

This invention provides a connection structure between a cutting head and a cutting arm, a cutting part, and a working machine, relating to the field of working machine technology. The connection structure includes: a cutting head with a mounting cavity, the cavity wall of which has a conical groove; a cutting arm including a cutting shaft passing through the mounting cavity, the cutting shaft having a communicating axial mounting groove and a radial sliding groove; a first locking post disposed within the radial sliding groove, the first locking post moving radially along the cutting shaft between a first position and a second position; when the first locking post is in the second position, at least a portion of the first locking post is within the conical groove, the outer wall of the first locking post abutting against the groove wall; and a second locking post disposed within the axial mounting groove, the second locking post moving axially along the cutting shaft between a third position and a fourth position; when the second locking post is in the fourth position, at least a portion of the second locking post abutting against the first locking post, thereby keeping the first locking post in the second position.

Description

Technical Field

[0001] This invention relates to the field of machinery technology, and more specifically, to a connection structure between a cutting head and a cutting arm, a cutting part, and a type of machinery. Background Technology

[0002] In related technologies, the operating machinery includes a cutting head and a cutting arm. The cutting head and cutting arm are detachably connected by bolts. Bolts pass through the cutting head and cutting arm to provide axial restraint. Furthermore, the cutting head and cutting arm transmit torque through a spline structure to maintain relative fixation in the circumferential direction.

[0003] In the process of developing this invention, the inventors discovered at least the following problems in the related technology: Bolts are subjected to large torsional torques during operation, making them prone to breakage. Workers need to frequently check the bolt connections and continuously tighten them, resulting in high labor intensity. Furthermore, this method is not ideal for axially limiting the cutting head and cutting arm. Summary of the Invention

[0004] In order to solve or improve at least one of the above-mentioned technical problems, one object of the present invention is to provide a connection structure between a cutting head and a cutting arm.

[0005] Another object of the present invention is to provide a cutting part having the above-described connection structure of the cutting head and the cutting arm.

[0006] Another object of the present invention is to provide a working machine having the above-described cutting section.

[0007] To achieve the above objectives, a first aspect of the present invention provides a connection structure between a cutting head and a cutting arm, comprising: a cutting head having a mounting cavity, the cavity wall of which has a conical groove; a cutting arm including a cutting shaft passing through the mounting cavity, the cutting shaft having a communicating axial mounting groove and a radial sliding groove; a first locking post disposed in the radial sliding groove, the first locking post having a first position and a second position, the first locking post moving radially relative to the cutting shaft from the first position to the second position or from the second position to the first position, wherein when the first locking post is in the second position, at least a portion of the first locking post is in the conical groove, and the outer wall of the first locking post abuts against the groove wall of the conical groove; and a second locking post disposed in the axial mounting groove, the second locking post having a third position and a fourth position, the second locking post moving axially relative to the cutting shaft from the third position to the fourth position or from the fourth position to the third position, wherein when the second locking post is in the fourth position, at least a portion of the second locking post abuts against the first locking post, thereby keeping the first locking post in the second position.

[0008] According to the technical solution of the connection structure between the cutting head and the cutting arm provided by the present invention, the bolts in the traditional connection method are replaced by a first locking post and a second locking post. During the movement of the second locking post from the third position to the fourth position, it can drive the first locking post to move from the first position to the second position. When the second locking post is in the fourth position and the first locking post is in the second position, the second locking post and the first locking post are locked together, and the first locking post is locked to the tapered groove of the cutting head, thereby achieving axial limiting of the cutting head and the cutting shaft. This design provides better axial limiting, the locking posts are less prone to breakage, and the method for workers to check the connection status is simple, which helps to reduce labor intensity.

[0009] Specifically, the connection structure between the cutting head and the cutting arm includes a cutting head, a cutting arm, a first locking pin, and a second locking pin. The cutting head is a rotating component in the operating machinery that directly cuts the rock mass. The cutting head has a mounting cavity. The cutting head includes a cutting shaft, which passes through the mounting cavity of the cutting head. Further, the cutting shaft has a communicating axial mounting groove and a radial sliding groove. Optionally, the cutting shaft has an axial mounting groove along the axial direction and a radial sliding groove along the radial direction.

[0010] Further, the first locking post is disposed within a radial groove. The first locking post has a first station and a second station. The first locking post moves radially relative to the cutting axis from the first station to the second station or from the second station to the first station. In other words, the first locking post can move relative to the cutting axis between the first station and the second station. Further, the cavity wall of the mounting cavity of the cutting head is provided with a conical groove. When the first locking post is in the second station, at least a portion of the first locking post is within the conical groove, and the outer wall of the first locking post abuts against the groove wall. Optionally, when the first locking post is in the second station, its end can extend out of the cutting axis and into the conical groove. Optionally, the first locking post is a locking steel post.

[0011] It is worth noting that the number of radial grooves is at least one, meaning there can be one, two, or more radial grooves. The number of first locking posts is also at least one, meaning there can be one, two, or more first locking posts. Considering space occupancy, the limiting effect on the cutting head, cost, and other factors, the radial grooves and first locking posts can be flexibly configured according to actual needs.

[0012] Furthermore, the second locking post is located within the axial mounting groove of the cutting shaft. The second locking post has a third position and a fourth position. The second locking post can move relative to the cutting shaft axially from the third position to the fourth position or from the fourth position to the third position. In other words, the second locking post can move relative to the cutting shaft between the third and fourth positions. During the movement of the second locking post from the third position to the fourth position, it can drive the first locking post to move from the first position to the second position. When the second locking post is in the third position, the first locking post is in the first position; when the second locking post is in the fourth position, the first locking post is in the second position. When the second locking post is in the fourth position, at least a portion of the second locking post abuts against the first locking post, so that the first locking post is held in the second position, at which point the cutting head and the cutting shaft are axially fixed relative to each other. When the operator checks whether the first and second locking posts are working properly, the second locking post is moved from the fourth position to the third position, and it is observed whether the first locking post can retract smoothly (the second position moves smoothly to the first position).

[0013] Optionally, the circumferential sidewall of the second locking post is provided with external threads, and the inner wall of the axial mounting groove is provided with internal threads. The second locking post is threadedly connected to the axial mounting groove of the cutting shaft. The operator can move the second locking post relative to the cutting shaft between the third and fourth positions by rotating it. Optionally, the second locking post is a locking stud.

[0014] In the technical solution defined by this invention, bolts are replaced by a first locking post and a second locking post in the traditional connection method. As the second locking post moves from the third station to the fourth station, it drives the first locking post to move from the first station to the second station. When the second locking post is in the fourth station and the first locking post is in the second station, the second locking post and the first locking post are locked together, and the first locking post is locked to the tapered groove of the cutting head, thereby achieving axial limiting of the cutting head and the cutting shaft. This design provides better axial limiting, reduces the likelihood of locking post breakage, simplifies the process of checking the connection status for workers, and helps reduce labor intensity.

[0015] In addition, the technical solution provided by the present invention may also have the following additional technical features:

[0016] Optionally, there are multiple radial grooves arranged in a circumferential array in the cutting shaft. The number of first locking posts is the same as the number of radial grooves, and each first locking post is located in a corresponding radial groove.

[0017] In this technical solution, this design ensures that the first locking pin in the second station can lock the cutting head, fixing the cutting head and the cutting shaft relatively in the axial direction. The circumferential array arrangement of multiple radial grooves and multiple first locking pins further enhances the axial limiting effect.

[0018] Optionally, the cross-sectional shape of the conical groove is angular; and / or the end of the first locking post facing the conical groove is provided with a hemisphere.

[0019] In this technical solution, when the second locking post is in the second position, the spherical surface of the hemisphere can abut against the wall of the conical groove to achieve a locking state, ensuring that the cutting head and the cutting shaft are relatively fixed in the axial direction.

[0020] Optionally, the second locking post includes a first segment and a second segment connected together. The first segment passes through the axial mounting groove and is threaded to the cutting shaft. When the second locking post is in the fourth position, the circumferential sidewall of the second segment abuts against one end of the first locking post, so that the first locking post is held in the second position.

[0021] In this technical solution, the second locking post includes a first segment and a second segment connected together. Specifically, one end of the first segment is connected to one end of the second segment. The first segment passes through an axial mounting groove. The first segment is threadedly connected to the axial mounting groove of the cutting shaft. The operator can move the second locking post relative to the cutting shaft between the third and fourth positions by rotating it. When the second locking post is in the fourth position, the circumferential sidewall of the second segment abuts against one end of the first locking post, so that the first locking post is held in the second position. Optionally, the second segment has a cone at the end away from the first segment, and the tip (small end) of the cone is away from the first segment. During the process of the second locking post moving from the third position to the fourth position, the tip of the cone first passes through the gap between the multiple first locking posts and begins to push against the first locking post, moving radially along the cutting shaft until the first locking post is in the second position.

[0022] Optionally, the first and second segments can be fixed together by welding, which simplifies the processing; or, the first and second segments can be an integral structure, which has better mechanical properties and higher connection strength compared to post-processing, thus reducing the number of parts and improving assembly efficiency.

[0023] Optionally, the radial dimension of the first segment is greater than that of the second segment, and the first segment and the second segment form a stepped structure. The stepped structure has a stepped surface, which is the sidewall connecting the first segment and the second segment. When the second locking post is in the fourth position, the stepped surface abuts against the first locking post.

[0024] In this technical solution, the second locking post has a stepped structure with a stepped surface. When the second locking post is in the fourth position, the stepped surface can abut against the first locking post, so that the second locking post and the first locking post are locked together. At this time, the first locking post is held in the second position, and the cutting head and the cutting shaft are fixed relative to each other in the axial direction.

[0025] Optionally, the angle between the step surface and the axis of the second locking post is not 90 degrees.

[0026] In this technical solution, the step surface has a certain inclination angle. When the second locking post is in the fourth position, the step surface abuts against the first locking post, and the locking state is more secure.

[0027] Optionally, it also includes: a limiting ring, sleeved on the cutting shaft, the limiting ring being used to limit the movement range of the first locking pin.

[0028] In this technical solution, the connection structure between the cutting head and the cutting arm also includes a limiting retaining ring. Specifically, the limiting retaining ring is sleeved on the cutting shaft. By setting the limiting retaining ring, the movement range of the first locking pin can be limited, preventing the first locking pin from excessively extending out of the cutting shaft and falling off during the process of moving from the first station to the second station.

[0029] Optionally, the cavity wall of the mounting cavity of the cutting head is provided with a placement groove, which communicates with the radial sliding groove. At least part of the limiting retaining ring is provided in the placement groove.

[0030] Optionally, it also includes: an anti-loosening bolt, which passes through the cutting head and the second locking post.

[0031] In this technical solution, the connection structure between the cutting head and the cutting arm also includes anti-loosening bolts. Specifically, the anti-loosening bolts pass through the cutting head and the second locking post. By providing anti-loosening bolts, the second locking post and the cutting head can be relatively fixed, thus preventing loosening.

[0032] It is worth noting that the number of anti-loosening bolts is at least one; that is, there can be one, two, or more anti-loosening bolts. Considering the anti-loosening effect, space occupation, cost, and other factors, the number of anti-loosening bolts can be flexibly set according to actual needs.

[0033] A second aspect of the present invention provides a cutting part, comprising: a driving member; a connection structure between a cutting head and a cutting arm as described in any of the above technical solutions, wherein the cutting shaft of the connection structure between the cutting head and the cutting arm is connected to the driving member.

[0034] According to the technical solution of the cutting part of the present invention, the cutting part includes a driving member and a connection structure between the cutting head and the cutting arm as described in any of the above technical solutions. The cutting shaft of the connection structure between the cutting head and the cutting arm is connected to the driving member. The driving member transmits torque to the cutting head through the cutting axis.

[0035] Since the cutting section includes the connection structure between any of the cutting heads and cutting arms in the first aspect mentioned above, it has the beneficial effects of any of the above technical solutions, which will not be elaborated here.

[0036] A third aspect of the present invention provides a working machine, including the connection structure between the cutting head and the cutting arm as described in any of the above technical solutions, or the cutting part as described in the above technical solutions.

[0037] According to the technical solution of the operating machinery of the present invention, the operating machinery includes the connection structure between the cutting head and the cutting arm as described in any of the above-mentioned technical solutions, or the cutting part as described in the above-mentioned technical solutions. Optionally, the operating machinery includes a body and a cutting part, with the cutting part disposed on the body. The cutting part is capable of fracturing and cutting the rock mass at the working face.

[0038] It is worth noting that the operating machinery can be equipment such as mining machines or tunneling machines.

[0039] Additional aspects and advantages of the technical solutions of the present invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0040] Figure 1 A first schematic diagram of the connection structure between the cutting head and the cutting arm according to an embodiment of the present invention is shown;

[0041] Figure 2 A cross-sectional view of the connection structure between the cutting head and the cutting arm according to an embodiment of the present invention is shown;

[0042] Figure 3 It shows Figure 1 A magnified view of part A in the middle;

[0043] Figure 4 A schematic diagram of a second locking post according to an embodiment of the present invention is shown;

[0044] Figure 5 A second schematic diagram of the connection structure between the cutting head and the cutting arm according to an embodiment of the present invention is shown;

[0045] Figure 6 A schematic diagram of a cutting portion according to an embodiment of the present invention is shown;

[0046] Figure 7 A schematic diagram of a working machine according to an embodiment of the present invention is shown.

[0047] in, Figures 1 to 7 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0048] 100: Connection structure between cutting head and cutting arm; 110: Cutting head; 111: Mounting cavity; 112: Conical groove; 113: Placement groove; 120: Cutting arm; 121: Cutting shaft; 1211: Axial mounting groove; 1212: Radial sliding groove; 131: First locking post; 132: Hemisphere; 140: Second locking post; 141: First section; 142: Second section; 143: Cone; 144: Stepped surface; 150: Limiting retaining ring; 160: Anti-loosening bolt; 200: Cutting part; 210: Driving component; 300: Operating machinery; 310: Machine body. Detailed Implementation

[0049] To better understand the above-described objectives, features, and advantages of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0050] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, embodiments of the invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0051] The following reference Figures 1 to 7 The present invention describes a connection structure 100 for a cutting head and a cutting arm, a cutting section 200, and a working machine 300 provided according to some embodiments of the present invention.

[0052] In one embodiment of the invention, such as Figure 1 and Figure 5 As shown, the connection structure 100 between the cutting head and the cutting arm includes a cutting head 110, a cutting arm 120, a first locking pin 131, and a second locking pin 140. The cutting head 110 is a rotating component in the working machinery 300 that directly cuts rock. The cutting head 110 has a mounting cavity 111. The cutting head 110 includes a cutting shaft 121, which passes through the mounting cavity 111. Further, the cutting shaft 121 has an axial mounting groove 1211 along its axial direction and a radial sliding groove 1212 along its radial direction. The radial sliding groove 1212 communicates with the axial mounting groove 1211.

[0053] Furthermore, such as Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, the first locking post 131 is disposed within the radial groove 1212. The first locking post 131 has a first station and a second station. The first locking post 131 can move radially relative to the cutting shaft 121 from the first station to the second station or from the second station to the first station. In other words, the first locking post 131 can move relative to the cutting shaft 121 between the first station and the second station. Further, the cavity wall of the mounting cavity 111 of the cutting head 110 is provided with a conical groove 112. When the first locking post 131 is in the second station, at least a portion of the first locking post 131 is within the conical groove 112, and the outer wall of the first locking post 131 abuts against the groove wall of the conical groove 112. Optionally, when the first locking post 131 is in the second station, its end can extend out of the cutting shaft 121 and into the conical groove 112. Optionally, the first locking post 131 is a locking steel post.

[0054] It is worth noting that the number of radial grooves 1212 is at least one, that is, there can be one, two, or more radial grooves 1212. The number of first locking posts 131 is at least one, that is, there can be one, two, or more first locking posts 131. Considering space occupancy, the limiting effect on the cutting head 110, cost, and other factors, the radial grooves 1212 and the first locking posts 131 can be flexibly set according to actual needs.

[0055] Furthermore, such as Figure 1 As shown, the second locking pin 140 is disposed within the axial mounting groove 1211 of the cutting shaft 121. The second locking pin 140 has a third position and a fourth position. The second locking pin 140 can move relative to the cutting shaft 121 along the axial direction of the cutting shaft 121 from the third position to the fourth position or from the fourth position to the third position. In other words, the second locking pin 140 can move relative to the cutting shaft 121 between the third position and the fourth position. During the movement of the second locking pin 140 from the third position to the fourth position, it can drive the first locking pin 131 to move from the first position to the second position. When the second locking pin 140 is in the third position, the first locking pin 131 is in the first position; when the second locking pin 140 is in the fourth position, the first locking pin 131 is in the second position. With the second locking post 140 in the fourth position, at least a portion of the second locking post 140 abuts against the first locking post 131, keeping the first locking post 131 in the second position. At this time, the cutting head 110 and the cutting shaft 121 are axially fixed. When the operator checks whether the first locking post 131 and the second locking post 140 are working properly, the second locking post 140 is moved from the fourth position to the third position, and it is observed whether the first locking post 131 can retract smoothly (the second position can be smoothly moved to the first position).

[0056] Optionally, the circumferential sidewall of the second locking post 140 is provided with external threads, and the inner wall of the axial mounting groove 1211 is provided with internal threads. The second locking post 140 is threadedly connected to the axial mounting groove 1211 of the cutting shaft 121. The operator can move the second locking post 140 relative to the cutting shaft 121 between the third and fourth working positions by rotating it. Optionally, the second locking post 140 is a locking stud.

[0057] In the technical solution defined by this invention, the bolts in the traditional connection method are replaced by the first locking post 131 and the second locking post 140. During the movement of the second locking post 140 from the third station to the fourth station, it can drive the first locking post 131 to move from the first station to the second station. When the second locking post 140 is in the fourth station and the first locking post 131 is in the second station, the second locking post 140 and the first locking post 131 are locked together, and the first locking post 131 is locked to the tapered groove 112 of the cutting head 110, thereby achieving axial limiting of the cutting head 110 and the cutting shaft 121. This design provides better axial limiting, the locking posts are less prone to breakage, and the method for workers to check the connection status is simple, which helps to reduce labor intensity.

[0058] In some embodiments, optionally, such as Figure 2 As shown, there are multiple radial grooves 1212 arranged in a circumferential array within the cutting shaft 121. The number of first locking posts 131 is the same as the number of radial grooves 1212, with each first locking post 131 located within a corresponding radial groove 1212. This design ensures that the first locking posts 131 in the second station can lock the cutting head 110, thus fixing the cutting head 110 axially relative to the cutting shaft 121. The circumferential array arrangement of the multiple radial grooves 1212 and the multiple first locking posts 131 further enhances the axial limiting effect.

[0059] In some embodiments, optionally, such as Figure 1 and Figure 3 As shown, the cross-sectional shape of the conical groove 112 is angular. Optionally, a hemisphere 132 is provided at one end of the first locking post 131 facing the conical groove 112. When the second locking post 140 is in the second position, the spherical surface of the hemisphere 132 can abut against the groove wall of the conical groove 112 to achieve a locked state, ensuring that the cutting head 110 and the cutting shaft 121 are relatively fixed in the axial direction.

[0060] In some embodiments, optionally, such as Figure 4As shown, the second locking post 140 includes a first segment 141 and a second segment 142 connected together. Specifically, one end of the first segment 141 is connected to one end of the second segment 142. The first segment 141 passes through an axial mounting groove 1211. The first segment 141 is threadedly connected to the axial mounting groove 1211 of the cutting shaft 121. The operator can move the second locking post 140 relative to the cutting shaft 121 between the third and fourth positions by rotating it. When the second locking post 140 is in the fourth position, the circumferential sidewall of the second segment 142 abuts against one end of the first locking post 131, so that the first locking post 131 is held in the second position. Optionally, the second segment 142 has a cone 143 at the end away from the first segment 141, and the tip (small end) of the cone 143 is away from the first segment 141. During the process of the second locking post 140 moving from the third station to the fourth station, the tip of the cone 143 first passes through the gap between the multiple first locking posts 131 and begins to move radially along the cutting axis 121 while pushing against the first locking posts 131 until the first locking posts 131 are in the second station.

[0061] Optionally, the first segment 141 and the second segment 142 are fixed together by welding, which is simple to process; or, the first segment 141 and the second segment 142 are an integral structure, which has better mechanical properties and higher connection strength than post-processing, and is conducive to reducing the number of parts and improving assembly efficiency.

[0062] In some embodiments, optionally, such as Figure 4 As shown, the radial dimension of the first segment 141 is larger than that of the second segment 142, and the first segment 141 and the second segment 142 form a stepped structure. The stepped structure has a stepped surface 144, which is the sidewall connecting the first segment 141 and the second segment 142. In other words, the second locking post 140 is a stepped structure, and the stepped structure has a stepped surface 144. When the second locking post 140 is in the fourth position, the stepped surface 144 can abut against the first locking post 131, so that the second locking post 140 and the first locking post 131 are in a locked state. At this time, the first locking post 131 is held in the second position, and the cutting head 110 and the cutting shaft 121 are fixed relative to each other in the axial direction.

[0063] In some embodiments, the angle between the stepped surface 144 and the axis of the second locking post 140 is not 90 degrees. The stepped surface 144 has a certain inclination angle, and when the second locking post 140 is in the fourth position, the stepped surface 144 abuts against the first locking post 131, and the locking state is more secure.

[0064] In the technical solution defined by this invention, when the second locking post 140 is in the fourth position and the first locking post 131 is in the second position, the stepped surface 144 of the second locking post 140 abuts against the first locking post 131, and the circumferential sidewall of the second locking post 140 abuts against one end of the first locking post 131. At this time, the second locking post 140 and the first locking post 131 are locked together. The other end of the first locking post 131 is in the conical groove 112, and the outer wall of the first locking post 131 abuts against the groove wall of the conical groove 112. At this time, the first locking post 131 is locked together with the cutting head 110.

[0065] In some embodiments, optionally, such as Figure 1 , Figure 2 and Figure 3 As shown, the connection structure 100 between the cutting head and the cutting arm also includes a limiting retaining ring 150. Specifically, the limiting retaining ring 150 is sleeved on the cutting shaft 121. By setting the limiting retaining ring 150, the movement range of the first locking pin 131 can be limited, preventing the first locking pin 131 from excessively extending out of the cutting shaft 121 and falling off during the process of moving from the first station to the second station.

[0066] Optionally, such as Figure 3 As shown, the cavity wall of the mounting cavity 111 of the cutting head 110 is provided with a placement groove 113, which communicates with the radial sliding groove 1212. At least a portion of the limiting retaining ring 150 is disposed in the placement groove 113.

[0067] In some embodiments, optionally, the number of conical grooves 112 is at least one. The number of conical grooves 112 can be one, two, or more, and can be flexibly set according to actual needs. Optionally, the number of first locking pins 131 is multiple. When the number of conical grooves 112 is one, multiple first locking pins 131 can extend into the same conical groove 112 when in the second position. When the number of conical grooves 112 is two or more, each first locking pin 131 can extend into a corresponding conical groove 112 when in the second position.

[0068] In some embodiments, optionally, such as Figure 1 and Figure 5 As shown, the connection structure 100 between the cutting head and the cutting arm also includes an anti-loosening bolt 160. Specifically, the anti-loosening bolt 160 passes through the cutting head 110 and the second locking post 140. By providing the anti-loosening bolt 160, the second locking post 140 and the cutting head 110 can be relatively fixed, thus preventing loosening.

[0069] It is worth noting that the number of anti-loosening bolts 160 is at least one, that is, there can be one, two or more anti-loosening bolts 160. Considering the anti-loosening effect, the space occupied, the cost and other factors, the number of anti-loosening bolts 160 can be flexibly set according to actual needs.

[0070] Optionally, the connection structure 100 between the cutting head and the cutting arm also includes a locking washer. The locking washer is fitted onto the anti-loosening bolt 160. One side of the locking washer abuts against the nut of the anti-loosening bolt 160, and the other side of the locking washer abuts against the cutting head 110. By providing the locking washer, the friction between the anti-loosening bolt 160 and the cutting head 110 is increased, thereby making it less likely for the anti-loosening bolt 160 to fall off.

[0071] Optionally, the 160 anti-loosening bolt is a hex bolt. Workers only need an Allen wrench to perform routine maintenance, eliminating potential problems in their early stages.

[0072] Optionally, the cutting head 110 is provided with a clearance groove. The nut of the anti-loosening bolt 160 is located in the clearance groove. In the solution of the present invention, only one clearance groove is required, which does not occupy the critical working space of the cutting head 110, facilitates the arrangement of the cutting teeth of the cutting head 110 and subsequent production processing, is less affected by the spline, and is easy to align and install. In addition, by replacing the bolts in the traditional connection method with the first locking post 131 and the second locking post 140, the cutting head 110 and the cutting shaft 121 are less likely to have relative movement, thereby reducing wear on the spline.

[0073] The advantages of the connection structure 100 between the cutting head and the cutting arm of the present invention are that it is easy to install and maintain on site, has multiple and multi-directional locking, low maintenance frequency, high reliability, long maintenance cycle and low maintenance cost.

[0074] In one embodiment of the invention, such as Figure 6 As shown, the cutting section 200 includes a drive member 210 and a connection structure 100 between the cutting head and the cutting arm in any of the above embodiments. The cutting shaft 121 of the connection structure 100 between the cutting head and the cutting arm is connected to the drive member 210. The drive member 210 transmits torque to the cutting head 110 through the cutting shaft 121.

[0075] In one embodiment of the present invention, the operating machinery 300 includes the connection structure 100 between the cutting head and the cutting arm as described in any of the above embodiments, or the cutting part 200 as described in the above embodiments. Optionally, as... Figure 7 As shown, the working machine 300 includes a body 310 and a cutting section 200, with the cutting section 200 located on the body 310. The cutting section 200 is capable of fracturing and cutting the rock mass at the working face.

[0076] It is worth noting that the operating machinery 300 can be equipment such as mining machines or tunneling machines.

[0077] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0078] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0079] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0080] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A connecting structure of a cutting head and a cutting arm, characterized by, include: The cutting head (110) is provided with a mounting cavity (111), and the cavity wall of the mounting cavity (111) is provided with a conical groove (112). The cutting arm (120) includes a cutting shaft (121) which passes through the mounting cavity (111). The cutting shaft (121) is provided with a communicating axial mounting groove (1211) and a radial sliding groove (1212). A first locking post (131) is disposed in the radial groove (1212). The first locking post (131) has a first station and a second station. The first locking post (131) moves radially relative to the cutting axis (121) from the first station to the second station or from the second station to the first station. When the first locking post (131) is in the second station, at least a portion of the first locking post (131) is in the conical groove (112). The outer wall of the first locking post (131) abuts against the groove wall of the conical groove (112). The second locking post (140) is disposed in the axial mounting groove (1211). The second locking post (140) has a third station and a fourth station. The second locking post (140) moves relative to the cutting shaft (121) along the axial direction of the cutting shaft (121) from the third station to the fourth station or from the fourth station to the third station. When the second locking post (140) is in the fourth station, at least a portion of the second locking post (140) abuts against the first locking post (131) so that the first locking post (131) is held in the second station. The radial grooves (1212) are multiple, and the multiple radial grooves (1212) are arranged in a circumferential array in the cutting shaft (121). The number of the first locking posts (131) is the same as the number of the radial grooves (1212), and each first locking post (131) is provided in a corresponding radial groove (1212). The cross-sectional shape of the conical groove (112) is angular; and / or the first locking post (131) has a hemisphere (132) at one end facing the conical groove (112). The second locking post (140) has an external thread on its circumferential sidewall and an internal thread on the inner wall of the axial mounting groove (1211). The second locking post (140) is threadedly connected to the axial mounting groove (1211) of the cutting shaft (121).

2. The cutting head to cutting arm connection structure according to claim 1, wherein, The second locking post (140) includes a first segment (141) and a second segment (142) connected together. The first segment (141) passes through the axial mounting groove (1211) and is threadedly connected to the cutting shaft (121). When the second locking post (140) is in the fourth position, the circumferential sidewall of the second segment (142) abuts against one end of the first locking post (131) so that the first locking post (131) is held in the second position.

3. The connection structure between the cutting head and the cutting arm according to claim 2, characterized in that, The radial dimension of the first segment (141) is greater than that of the second segment (142). The first segment (141) and the second segment (142) form a stepped structure. The stepped structure has a stepped surface (144). The stepped surface (144) is the side wall connecting the first segment (141) and the second segment (142). When the second locking post (140) is in the fourth position, the stepped surface (144) abuts against the first locking post (131).

4. The cutting head to cutting arm connection structure according to claim 3, wherein, The angle between the stepped surface (144) and the axis of the second locking post (140) is not 90 degrees.

5. The cutting head to cutting arm connection structure according to claim 1, wherein, Also includes: A limiting ring (150) is sleeved on the cutting shaft (121), and the limiting ring (150) is used to limit the movement range of the first locking pin (131).

6. The cutting head to cutting arm connection structure according to claim 1, wherein, Also includes: An anti-loosening bolt (160) is inserted between the cutting head (110) and the second locking post (140).

7. A cutting assembly characterized by, include: Drive unit (210); According to any one of claims 1 to 6, the cutting shaft (121) of the cutting head and cutting arm connection structure is connected to the driving member (210).

8. A work machine characterized by, It includes the connection structure between the cutting head and the cutting arm as described in any one of claims 1 to 6, or the cutting part as described in claim 7.

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