Slot milling machine and shock absorbing device and shock absorbing method used in slot milling machine

Abstract

The present invention discloses a slot milling machine and a shock absorbing device and a shock absorbing method for the slot milling machine, wherein the shock absorbing device comprises: a housing and a shock absorbing unit; a groove is provided on the lower end surface of the housing close to the gear box side corresponding to each shock absorbing unit, and the shock absorbing unit is accommodated and fixed in the groove; the shock absorbing unit comprises a connecting block, a rubber layer and an outer guard plate; the rubber layer is arranged on the outer peripheral side of the connecting block in the horizontal direction; the outer guard plate is arranged on the outer peripheral side of the rubber layer in the horizontal direction, so that the rubber layer is sandwiched between the connecting block and the outer guard plate, and the plate surface of the outer guard plate is in contact with the side wall of the groove; the upper end surface of the housing close to the tool holder body is provided with a first connecting hole for connecting with the tool holder body; the lower end surface of the connecting block close to the gear box side is provided with a second connecting hole for connecting with the gear box. The present invention effectively attenuates the impact of the slot milling machine during operation, reduces the alternating load and downward pressure impact on the gear box, and buffers the recoil force of the milling wheel, so that the gear box can withstand a larger load.

Description

Technical Field

[0001] The invention relates to the technical field of vibration reduction of slot milling machines, in particular to a slot milling machine and a vibration reduction device and a vibration reduction method applied to the slot milling machine. Background Art

[0002] As a relatively advanced equipment for foundation construction, slot milling machines are being used more and more. Slot milling machines mainly include a tool holder body and a working device. The working device mainly includes a gear box and a milling wheel. The working device is installed under the tool holder body through the support frame of the gear box, and realizes rock breaking operation during the downward pressure of the tool holder body and the up and down jumping of the recoil force of the milling wheel. The slot milling machine relies on the gear box to drive the milling wheel to rotate to break the rock. During the rock breaking process, the slot milling machine will be subjected to high-intensity impact and the resulting alternating load. If there is no shock-absorbing device to protect it, this high-intensity impact will greatly shorten the service life of the gear box, and will also cause fatigue fracture of the structural parts under the alternating load, which will result in high maintenance costs and have a great impact on the progress of the project.

[0003] In order to enable the gearbox to withstand greater impact, the prior art adds a shock absorber between the gearbox and the milling wheel, which can attenuate the impact of the milling wheel breaking rock as much as possible, thereby protecting the gearbox. However, when the milling wheel specifications are constant, the added shock absorber will cause the gearbox size to become smaller, so that the gearbox is limited in load bearing, which limits the scope of use of the slot milling machine.

[0004] Therefore, technical personnel in this field urgently need to provide a slot milling machine that can not only attenuate the impact of the milling wheel during rock breaking to protect the gear box, but also ensure that the gear box can withstand high loads to expand the use range of the slot milling machine. Summary of the invention

[0005] The purpose of the present invention is to provide a slot milling machine and a shock absorbing device and a shock absorbing method applied to the slot milling machine, which can not only attenuate the impact of the milling wheel in the process of breaking rocks to protect the gear box, but also ensure that the gear box can withstand high loads to expand the use range of the slot milling machine.

[0006] The technical solution provided by the present invention is as follows:

[0007] The invention discloses a slot milling machine, comprising:

[0008] Tool holder body, working device and shock absorbing device;

[0009] The shock absorbing device is arranged between the tool holder body and the working device, and is used to buffer the impact between the tool holder body and the working device;

[0010] The working device is integrated with a gear box and a milling wheel, and the milling wheel is installed on the output shaft of the gear box.

[0011] Preferably, the shock absorbing device is further used to buffer the impact between the gear box and the milling wheel.

[0012] Preferably, the tool holder body is arranged above the shock absorbing device; and the working device is arranged below the shock absorbing device.

[0013] Preferably, the output end diameter of the gear box is greater than 600 mm and not greater than 2000 mm.

[0014] Preferably, the shock absorbing device comprises: a shell and at least one shock absorbing unit; a groove is provided on the lower end surface of the shell close to the gear box side corresponding to each of the shock absorbing units, and the shock absorbing unit is accommodated and fixed in the groove; the shock absorbing unit comprises at least one connecting block, a rubber layer and at least one outer protective plate; the rubber layer is horizontally arranged on the outer peripheral side of the connecting block; the outer protective plate is horizontally arranged on the outer peripheral side of the rubber layer, so that the rubber layer is sandwiched between the connecting block and the outer protective plate, and the plate surface of the outer protective plate is in contact with the side wall of the groove; the upper end surface of the shell close to the tool holder body side is provided with a first connecting hole for connecting to the tool holder body; the lower end surface of the connecting block close to the gear box side is provided with a second connecting hole for connecting to the gear box.

[0015] Preferably, a gap is provided between two outer guard plates adjacently arranged in the horizontal direction, and a keyway is provided on the side wall of the groove corresponding to the gap; a flat key is installed in the gap and the keyway, a part of the flat key is located in the gap, and the other part of the flat key is located in the keyway.

[0016] Preferably, the rubber layer is bonded to the connecting block; and / or,

[0017] The outer guard plate is bonded to the rubber layer; and / or,

[0018] The housing is provided with a sand suction avoidance position and a third connection hole corresponding to the sand suction port for connecting to the mud pump; and / or,

[0019] The housing is provided with a valve block avoidance position corresponding to the valve block of the gear box; and / or,

[0020] One gear box is provided with one or more damping units; and / or,

[0021] Preferably, the first connecting hole is arranged away from the groove.

[0022] Preferably, it also includes an L-shaped limit block, which includes a vertical limit block extending in the up-down direction and a transverse limit block extending in the horizontal direction; the vertical limit block and the transverse limit block are arranged approximately vertically; the gear box includes a gear box body and a T-shaped mounting frame, the T-shaped mounting frame includes a transverse connecting plate extending in the horizontal direction and a vertical connecting plate extending in the up-down direction, and the transverse connecting plate is arranged above the vertical connecting plate; the two L-shaped limit blocks are relatively arranged on both sides of the transverse connecting plate, so that the transverse connecting plate is limited to the inner right angle of the L-shaped limit block; the end of the vertical limit block away from the transverse limit block is connected to the shell; the transverse connecting plate is connected to the connecting block through the second connecting hole.

[0023] Preferably, a lateral shock absorbing unit is further included, and the lateral shock absorbing unit includes a buffer layer sandwiched between the tool holder body and the shell in the up-down direction.

[0024] Preferably, the buffer layer includes a rubber layer and a mounting plate stacked in an up-and-down direction.

[0025] Preferably, the tool holder body is connected to the shell of the shock absorbing device, and the tool holder body is arranged above the shell; the gear box is connected to the connecting block of the shock absorbing device, and the gear box is arranged below the connecting block; the milling wheel is installed on the gear box.

[0026] The present invention also discloses a shock absorbing device applied to the slot milling machine as described in any one of the above items, wherein the shock absorbing device is arranged between the tool holder body and the working device to buffer the impact between the tool holder body and the working device.

[0027] Preferably, the shock absorbing device is further used to buffer the impact between the gear box and the milling wheel.

[0028] Preferably, the shock absorbing device comprises: a shell and at least one shock absorbing unit; a groove is provided on the lower end surface of the shell close to the gear box side corresponding to each of the shock absorbing units, and the shock absorbing unit is accommodated and fixed in the groove; the shock absorbing unit comprises at least one connecting block, a rubber layer and at least one outer protective plate; the rubber layer is horizontally arranged on the outer peripheral side of the connecting block; the outer protective plate is horizontally arranged on the outer peripheral side of the rubber layer, so that the rubber layer is sandwiched between the connecting block and the outer protective plate, and the plate surface of the outer protective plate is in contact with the side wall of the groove; the upper end surface of the shell close to the tool holder body side is provided with a first connecting hole for connecting to the tool holder body; the lower end surface of the connecting block close to the gear box side is provided with a second connecting hole for connecting to the gear box.

[0029] Preferably, a gap is provided between two outer guard plates adjacently arranged in the horizontal direction, and a keyway is provided on the side wall of the groove corresponding to the gap; a flat key is installed in the gap and the keyway, a part of the flat key is located in the gap, and the other part of the flat key is located in the keyway.

[0030] Preferably, the rubber layer is bonded to the connecting block; and / or,

[0031] The outer guard plate is bonded to the rubber layer; and / or,

[0032] The housing is provided with a sand suction avoidance position and a third connection hole corresponding to the sand suction port for connecting to the mud pump; and / or,

[0033] The housing is provided with a valve block avoidance position corresponding to the valve block of the gear box; and / or,

[0034] One gear box is provided with one or more damping units; and / or,

[0035] Preferably, the first connecting hole is arranged away from the groove.

[0036] Preferably, it also includes an L-shaped limit block, which includes a vertical limit block extending in the up-down direction and a transverse limit block extending in the horizontal direction; the vertical limit block and the transverse limit block are arranged approximately vertically; the gear box includes a gear box body and a T-shaped mounting frame, the T-shaped mounting frame includes a transverse connecting plate extending in the horizontal direction and a vertical connecting plate extending in the up-down direction, and the transverse connecting plate is arranged above the vertical connecting plate; the two L-shaped limit blocks are relatively arranged on both sides of the transverse connecting plate, so that the transverse connecting plate is limited to the inner right angle of the L-shaped limit block; the end of the vertical limit block away from the transverse limit block is connected to the shell; the transverse connecting plate is connected to the connecting block through the second connecting hole.

[0037] Preferably, a lateral shock absorbing unit is further included, and the lateral shock absorbing unit includes a buffer layer sandwiched between the tool holder body and the shell in the up-down direction.

[0038] Preferably, the buffer layer includes a rubber layer and a mounting plate stacked in an up-and-down direction.

[0039] The present invention also discloses a shock absorbing method applied to a slot milling machine as described in any one of the above, comprising: buffering the impact between the tool holder body and the working device.

[0040] Preferably, the shock absorbing method further comprises: buffering the impact between the gear box and the milling wheel.

[0041] The slot milling machine and the shock absorbing device and shock absorbing method applied to the slot milling machine provided by the present invention can bring at least one of the following beneficial effects:

[0042] 1. The present invention takes into account other vibration sources of the gearbox and reduces the impact of the existing shock-absorbing device on the size of the gearbox, which has made a breakthrough in changing the design of the existing technology of setting a shock-absorbing device between the gearbox and the milling wheel. The present invention sets the shock-absorbing device between the tool holder body and the gearbox to effectively attenuate the impact of the working process of the slot milling machine, reduce the recoil force transmitted from the gearbox to the tool holder body, reduce the amplitude of the up and down jump of the tool holder body, greatly reduce the alternating load and downward pressure impact on the gearbox, and buffer the recoil force of the milling wheel, effectively protect the gearbox, and increase the service life of the gearbox.

[0043] 2. Under the condition of the same milling wheel specifications, compared with the prior art, the shock absorbing device does not limit the size of the gear box, so that the slot milling machine can be equipped with a larger gear box, so that the gear box can withstand a larger load, and the gear box can withstand a maximum downward pressure of 15 tons of the tool holder body from the existing pressure to 50 tons or even more, which greatly improves the rock breaking ability and high-power operation performance of the slot milling machine, so as to expand its scope of use.

[0044] 3. More preferably, the rubber layer is circumferentially arranged on the connecting block in the horizontal direction, and the connecting block is connected to the gear box in the up-down direction. Compared with directly arranging the rubber layer between the connecting block and the gear box in the up-down direction (i.e., the rubber layer is horizontally arranged between the connecting block and the gear box), the shock absorbing area of ​​the circumferential rubber layer is much larger than the shock absorbing area of ​​the horizontally arranged rubber layer, thereby ensuring the excellent shock absorbing performance of the shock absorbing device; more preferably, the shock absorbing device is directly in contact with the tool holder body and the gear box with hard connectors (shell and connecting block), so that the tool holder body and the gear box are in hard contact, ensuring the reliability and stability of the direct connection between the tool holder body, shell and gear box, and the rubber layer is arranged on the force transmission path between the tool holder body and the gear box (i.e., The rubber layer is arranged between the connecting block and the gear box in the up-down direction, which makes the contact between the tool holder body and the gear box flexible. Compared with the flexible contact that directly absorbs the force transmission between the tool holder body and the gear box, the hard contact force transmission is more timely, effective, reliable and controllable, so that the force transmission path and the shock absorption path between the tool holder body and the gear box of the present invention are different and independent of each other on the same shock absorbing device, ensuring the efficient and stable operation of the gear box under the high downward pressure of the tool holder body; it also avoids the phenomenon that the rubber layer is easily failed and worn due to deformation caused by the downward pressure transmitted by the tool holder body or the recoil force of the milling wheel when it is arranged horizontally, greatly prolonging the effective service life of the rubber layer, thereby prolonging the effective service life of the shock absorbing device.

[0045] 4. In the present invention, the limit block is used to limit the large swing of the gear box when the rubber layer is deformed, thereby ensuring the reliability of the contact between the milling wheel and the rock mass, and the linearity of the up and down movement of the milling wheel, thereby ensuring the high-precision and high-efficiency operating performance of the slot milling machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The preferred implementation scheme will be described below in a clear and understandable manner in conjunction with the accompanying drawings, and the above-mentioned characteristics, technical features, advantages and implementation methods of the slot milling machine and the shock absorbing device and shock absorbing method applied to the slot milling machine will be further explained.

[0047] Figure 1 It is a schematic structural diagram of an embodiment of the shock absorbing device of the present invention;

[0048] Figure 2 for Figure 1 AA cross-sectional structural diagram;

[0049] Figure 3 A schematic structural diagram of an embodiment of a housing of a shock absorbing device of the present invention;

[0050] Figure 4 A schematic structural diagram of an embodiment of a shock absorbing unit of the shock absorbing device of the present invention;

[0051] Figure 5 A schematic structural diagram of an embodiment of a slot milling machine of the present invention;

[0052] Figure 6 for Figure 5 The left view is a partial cross-sectional view of the structure;

[0053] Figure 7 for Figure 6 A schematic diagram of the structure of a partial enlarged view of point B.

[0054] Description of Figure Numbers:

[0055] 1-shock absorbing device, 11-housing, 111-groove, 1111-keyway, 112-first connecting hole, 113-sand suction avoidance position, 114-third connecting hole, 115-valve block avoidance position, 116-fourth connecting hole, 117-partition, 12-shock absorbing unit, 121-connecting block, 1211-second connecting hole, 122-rubber layer, 123-outer guard plate, 124-gap, 13-L-type limit block, 131-vertical limit block, 1311-fifth connecting hole, 132-lateral limit block, 2-tool holder body, 31-T-type mounting frame, 311-lateral connecting plate, 312-vertical connecting plate, 4-mud pump, 41-sand suction port, 5-milling wheel, 61-first connecting piece, 62-second connecting piece. DETAILED DESCRIPTION

[0056] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0057] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In this article, the tool holder body is arranged above the gear box to provide downward force, so the up and down direction refers to the direction in which the tool holder body jumps up and down, but it does not completely represent the actual situation.

[0058] In one embodiment of the present invention, Figure 1-4 As shown, a shock absorbing device is applied to a slot milling machine. The shock absorbing device 1 is arranged between a tool holder body 2 and a working device, and is used to buffer the impact between the tool holder body 2 and the working device and the impact during the rock breaking process of the working device. The working device is integrated with a gear box and a milling wheel 5; wherein the shock absorbing device 1 comprises: a housing 11 and at least one shock absorbing unit 12; a groove 111 is provided on the lower end surface of the housing 11 close to the gear box side corresponding to each shock absorbing unit 12, and the shock absorbing unit 12 is accommodated and fixed in the groove 111; the shock absorbing unit 12 comprises more than one connecting block 121, and a rubber layer 12 2 and one or more outer guard plates 123; the rubber layer 122 is horizontally arranged around the outer peripheral side of the connecting block 121; the outer guard plate 123 is horizontally arranged around the outer peripheral side of the rubber layer 122, so that the rubber layer 122 is sandwiched between the connecting block 121 and the outer guard plate 123, and the plate surface of the outer guard plate 123 is in contact with the side wall of the groove 111; the upper end surface of the shell 11 close to the tool holder body 2 is provided with a first connecting hole 112 for connecting to the tool holder body 2; the lower end surface of the connecting block 121 close to the gear box is provided with a second connecting hole 1211 for connecting to the gear box.

[0059] It is worth noting that the milling wheel is installed on the output shaft of the gearbox. When the milling wheel is working in rock breaking, the impact force it brings to the gearbox is also very direct and has a great impact. When the shock absorbing device 1 connected to the milling wheel also buffers the impact force of the milling wheel 5 in the up and down directions, it is equivalent to weakening the kinetic potential energy of the milling wheel 5, and the impact force applied to the gearbox by the milling wheel 5 comes from the kinetic potential energy, so the impact force applied to the gearbox is weakened. More preferably, since the shock absorbing device 1 is changed from the existing arrangement between the milling wheel 5 and the gearbox to limit the size of the gearbox, and the shock absorbing device 1 is arranged between the gearbox and the tool holder body 2, when the specifications of the milling wheel 5 are certain, the size of the gearbox of the present invention is no longer limited. Because the size of the gearbox is increased, the structural strength of the gearbox is increased, and it can withstand greater downward pressure and impact force, which greatly improves the rock breaking ability and high-power operation performance of the slot milling machine, thereby increasing its scope of use.

[0060] In practical applications, the number of grooves 111 and the number of shock absorbing units 12 preferably correspond one to one. The grooves 111 may or may not penetrate the shell 11 in the up-down direction. Preferably, the grooves 111 do not penetrate the shell 11 to ensure the structural strength of the shell 11 and the contact area between the shell 11 and the tool holder body 2, to ensure the effective transmission of the downward force, and to extend the effective service life of the shock absorbing device 1. The shell 11 may be provided with one or more shock absorbing units 12, but each gear box is provided with more than one shock absorbing unit 12. When the shell 11 is provided with multiple shock absorbing units 12, the adjacent shock absorbing units 12 are not in contact, but are provided separately through the partition 117. The partition 117 is preferably a part of the structure of the shell 11, so as to ensure the structural strength of the entire shock absorbing device 1. Preferably, the number of the first connecting hole 112 and the second connecting hole 1211 is more than one, preferably more than one (at least two or more), and the first connecting hole 112 and the second connecting hole 1211 can be arranged in a linear, cross-shaped, L-shaped or other shapes, respectively, according to actual needs. The shock absorbing unit 12 is preferably fixedly installed in the groove 111 by a tight fit, and the shock absorbing unit 12 can also be fixedly installed in the groove 111 by a connecting piece.

[0061] Preferably, a gap 124 is provided between two outer guard plates 123 adjacently arranged in the horizontal direction, and a keyway 1111 is provided on the side wall of the groove 111 corresponding to the gap 124; a flat key is installed in the gap 124 and the keyway 1111, a part of the flat key is located in the gap 124, and the other part of the flat key is located in the keyway 1111. It is worth noting that the outer guard plates 123 are arranged in a plurality of small sizes, so as to facilitate the production and assembly of the shock absorbing unit 12. Moreover, the flat key can not only further realize the installation and fixation of the shock absorbing unit 12 and the groove 111, but also play a guiding role when the shock absorbing unit 12 is installed in the groove 111, thereby ensuring the accuracy of the installation of the shock absorbing unit 12 and the groove 111, avoiding the phenomenon of poor installation due to misalignment, and improving the assembly efficiency and yield rate of the present invention.

[0062] Preferably, the rubber layer 122 is bonded to the connection block 121. Preferably, the outer guard plate 123 is bonded to the rubber layer 122. In practical applications, the rubber layer 122 can be connected to the connection block 121 through the adhesive layer, and the outer guard plate 123 can be connected to the rubber layer 122 through the adhesive layer. Of course, the rubber layer 122 can also be connected to the connection block 121 through rivets, pins, etc., and the outer guard plate 123 can also be connected to the rubber layer 122 through rivets, pins, etc. It is worth noting that the rubber layer 122 can be composed of a single-layer or multi-layer (more than two layers) rubber pad.

[0063] Preferably, the housing 11 is provided with a sand suction avoidance position 113 and a third connection hole 114 corresponding to the sand suction port 41 for connecting to the mud pump 4. In practical applications, since the slot milling machine will produce gravel and magma when working, it is necessary to suck and discharge them through the mud pump 4, so as to achieve high-efficiency work of breaking rocks and sucking sand at the same time. In order to ensure the stability and vibration instability of the sand suction port 41 during the operation of the slot milling machine, the sand suction port 41 can also be specifically installed and fixed on the housing 11 to ensure the stable and efficient operation of the sand suction port 41. Preferably, the housing 11 is provided with a valve block avoidance position 115 corresponding to the valve block of the gear box. It is worth noting that since each gear box is provided with a valve block, the setting position and number of the valve block avoidance position 115 are set according to the position and number of the gear box.

[0064] Preferably, one gearbox is provided with one or more damping units 12. According to processing requirements, slot milling machines can be divided into single-milling wheel slot milling machines, double-milling wheel slot milling machines, triple-milling wheel slot milling machines, etc. Therefore, in order to ensure the stability of gearbox installation and the efficient damping effect of the damping device 1 on the corresponding gearbox, each gearbox can be provided with one or more damping units 12. The damping units 12 can be arranged in parallel and / or vertically and / or at an angle, and the cross-sectional shape of the connecting block 121 can be a regular or irregular polygon such as a circle, a rectangle, an ellipse, etc.

[0065] Preferably, the first connection hole 112 is arranged away from the groove 111. The first connection hole 112 is arranged away from the groove 111 to avoid the first connection hole 112 and the groove 111 from penetrating through the housing 11, thereby affecting the normal use and structural strength of the shock absorbing device 1. Therefore, the first connection hole 112 is arranged away from the groove 111 to ensure the structural strength of the housing 11 and extend the service life of the shock absorbing device 1.

[0066] In actual application, the shock absorbing device 1 is arranged between the tool holder body 2 and the working device of the slot milling machine to buffer the mutual impact between the tool holder body 2 and the working device; the working device is integrated with a gear box and a milling wheel 5; and the milling wheel 5 is installed on the gear box. When the slot milling machine breaks rock in the up and down direction, the tool holder body 2 is arranged above the shock absorbing device 1, and the working device is arranged below the shock absorbing device 1. The size of the gearbox of the present invention is greatly increased. Compared with the output end diameter size of the existing gearbox, the output end diameter size of the gearbox of the present invention can be increased to within 40% (including 40%) under the same conditions, which greatly increases the structural size of the gearbox, thereby improving the rigidity of the gearbox. For example, when the maximum diameter size of the existing gearbox is 600mm, the output end diameter size range of the gearbox of the present invention is greater than 600mm and not greater than 2000mm. Preferably, when the output end diameter size of the existing gearbox is 600mm, the preferred diameter size of the gearbox of the present invention is 700mm-1800mm; the preferred diameter size of the gearbox of the present invention is 750mm-1600mm; the preferred diameter size of the gearbox of the present invention is 900mm-1400mm; the preferred diameter size of the gearbox of the present invention is 1200mm. Of course, the output end diameter size of the gearbox of the present invention can be set according to the rock breaking requirements of the slot milling machine.

[0067] In another embodiment of the present invention, Figure 1-7 As shown, on the basis of the above embodiment, it also includes an L-shaped limit block 13, the L-shaped limit block 13 includes a vertical limit block 131 extending in the up-down direction and a horizontal limit block 132 extending in the horizontal direction; the vertical limit block 131 and the horizontal limit block 132 are approximately vertically (vertically or nearly vertically, within the allowable range of the matching error between the L-shaped limit block 13 and the T-shaped mounting frame 31); the gear box includes a gear box body and a T-shaped mounting frame 31, and the T-shaped mounting frame 31 includes a vertical limit block 131 extending in the horizontal direction. The horizontal connecting plate 311 is arranged above the vertical connecting plate 312; two L-shaped limit blocks 13 are relatively arranged on both sides of the horizontal connecting plate 311, so that the horizontal connecting plate 311 is limited to the inner right angle of the L-shaped limit block 13; the end of the vertical limit block 131 away from the horizontal limit block 132 is connected to the shell 11; the horizontal connecting plate 311 is connected to the connecting block 121 through the second connecting hole 1211.

[0068] Preferably, the end of the vertical limit block 131 away from the lateral limit block 132 is provided with a fifth connection hole 1311, and the lower end surface of the housing 11 close to the gear box is provided with a fourth connection hole 116 corresponding to the fifth connection hole 1311, and the third connecting member sequentially penetrates the fifth connection hole 1311 and the fourth connection hole 116 to achieve the connection between the L-shaped limit block 13 and the housing 11. Preferably, the two L-shaped limit blocks 13 are relatively arranged along the axial direction of the milling wheel 5. Of course, two pairs of L-shaped limit blocks 13 can also be relatively arranged along the axial direction of the milling wheel 5 and along the radial direction of the milling wheel 5, respectively, so as to achieve the limitation of the gear box from four directions respectively to avoid the deflection of the gear box.

[0069] It is worth noting that when each gear box is installed through a T-shaped mounting frame 31, each T-shaped mounting frame 31 limits its deflection through an L-shaped limit block 13; when multiple (more than two) gear boxes are installed through a T-shaped mounting frame 31, the T-shaped mounting frame 31 limits its deflection through an L-shaped limit block 13. One shock absorbing device 1 can realize the installation of more than one gear box (or T-shaped mounting frame 31). Preferably, the transverse connecting plate 311 is provided with a sixth connecting hole corresponding to the second connecting hole 1211, and the second connecting member 62 realizes the connection between the transverse connecting plate 311 and the housing 11 through the second connecting hole 1211 and the sixth connecting hole.

[0070] In another embodiment of the present invention, on the basis of any of the above embodiments, it further includes a lateral shock absorbing unit, and the lateral shock absorbing unit includes a buffer layer arranged at an approximately vertical angle to the shock absorbing unit. Preferably, the buffer layer includes a rubber layer and a mounting plate stacked in the up and down direction. In practical applications, since the shock absorbing unit greatly realizes the shock absorption of the gear box, the service life of the lateral shock absorbing unit is greatly improved compared with the shock absorption effect directly realized by the lateral shock absorbing unit. Of course, the number of layers of the rubber layer and the mounting plate provided in the buffer layer can be set according to actual needs, which will not be repeated here. The lateral shock absorbing unit is provided with a seventh connecting hole corresponding to the first connecting hole 112, so that the first connecting member 61 that originally realizes the connection between the shell 11 and the tool holder body 2 can simultaneously realize the connection between the tool holder body 2, the lateral shock absorbing unit and the shell 11.

[0071] For example, Figure 1-4As shown, the housing 11 is provided with 12 grooves 111, each groove 111 accommodates and installs a shock absorbing unit 12, wherein every 6 shock absorbing units 12 are provided corresponding to a gear box (milling wheel 5), and the 6 shock absorbing units 12 are composed of two groups (1 large-size shock absorbing unit 12 and 2 small-size shock absorbing units 12). The shock absorbing units 12 are arranged symmetrically along the axis direction of the milling wheel 5, and the housing 11 is provided with a valve block avoidance position 115 between the two groups of shock absorbing units 12; and a sand absorption avoidance position 113 is provided at the center of the housing 11. A plurality of first connecting holes 112 and fourth connecting holes 116 are arranged around the outside of the outermost groove 111 (i.e., the outer peripheral side of the housing 11), and the first connecting holes 112 and the fourth connecting holes 116 are staggered in the up-down direction to avoid them from penetrating each other, thereby ensuring the structural strength of the housing 11.

[0072] In another embodiment of the present invention, Figure 1-7 As shown, a slot milling machine comprises: a tool holder body 2, a working device and a shock absorbing device 1 as described in any of the above embodiments; the shock absorbing device 1 is arranged between the tool holder body 2 and the working device, and is used to buffer the impact between the tool holder body 2 and the working device and the impact during the rock breaking process of the working device; the working device is integrated with a gear box and a milling wheel 5. Preferably, the tool holder body 2 is arranged above the shock absorbing device 1; the working device is arranged below the shock absorbing device 1. Preferably, the output end diameter of the gear box is greater than 600mm and not greater than 2000mm. Preferably, the output end diameter of the gear box is 750mm-1700mm, preferably, the output end diameter of the gear box is 800mm-1450mm, preferably, the output end diameter of the gear box is 1000mm-1350mm, preferably, the output end diameter of the gear box is 1200mm. Preferably, the output end diameter of the gear box is 800mm. Preferably, the tool holder body 2 is connected to the shell 11 of the shock absorbing device 1, and the tool holder body 2 is arranged above the shell 11; the gear box is connected to the connecting block 121 of the shock absorbing device 1, and the gear box is arranged below the connecting block 121; the milling wheel 5 is installed on the gear box.

[0073] The present invention also discloses a shock absorbing method for use in the aforementioned slot milling machine, which is used to buffer the impact between the tool holder body and the working device. The shock absorbing method of the present invention is different from the prior art. The prior art is to set a shock absorbing ring between the gear box and the milling wheel to attenuate the direct impact of the milling wheel on the gear box, but this will affect the size of the gear box. The shock absorbing method of the present invention is to attenuate the impact between the tool holder body and the working device, which is achieved by setting a shock absorbing device between the tool holder body and the working device, which is completely different from the prior art.

[0074] Furthermore, the shock absorbing method of the present invention can also indirectly buffer the impact between the gear box and the milling wheel. When the shock absorbing device connected to the milling wheel also buffers the impact force in the up and down directions of the milling wheel, it is equivalent to weakening the motion potential energy of the milling wheel, and the impact force applied by the milling wheel to the gear box is derived from the motion potential energy, so the impact force applied to the gear box is weakened.

[0075] It should be noted that the above embodiments can be freely combined as needed. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A slot milling machine, characterized in that: include: Tool holder body, working device and shock absorbing device; The shock absorbing device is arranged between the tool holder body and the working device, and is used to buffer the impact between the tool holder body and the working device; The working device is integrated with a gear box and a milling wheel, and the milling wheel is installed on the output shaft of the gear box; The shock absorbing device comprises: a housing and at least one shock absorbing unit; A groove is formed on the lower end surface of the housing close to the gear box, corresponding to each of the damping units, and the damping unit is accommodated and fixed in the groove; The shock absorbing unit comprises at least one connecting block, a rubber layer and at least one outer guard plate; the rubber layer is arranged around the outer periphery of the connecting block in a horizontal direction; the outer guard plate is arranged around the outer periphery of the rubber layer in a horizontal direction, so that the rubber layer is sandwiched between the connecting block and the outer guard plate, and the plate surface of the outer guard plate is in contact with the side wall of the groove; The upper end surface of the housing close to the tool holder body is provided with a first connecting hole for connecting with the tool holder body; The lower end surface of the connecting block close to the gear box is provided with a second connecting hole for connecting with the gear box.

2. The slot milling machine according to claim 1, characterized in that: The shock absorbing device is further used to buffer the impact between the gear box and the milling wheel.

3. The slot milling machine according to claim 1, characterized in that: The tool holder body is arranged above the shock absorbing device; the working device is arranged below the shock absorbing device; and / or, The output end diameter of the gear box is greater than 600 mm and not greater than 2000 mm.

4. The slot milling machine according to claim 1, characterized in that: A gap is provided between two adjacent outer guard plates in the horizontal direction, and a keyway is provided on the side wall of the groove corresponding to the gap; a flat key is installed in the gap and the keyway, a part of the flat key is located in the gap, and another part of the flat key is located in the keyway; and / or, The rubber layer is bonded to the connecting block; and / or, The outer guard plate is bonded to the rubber layer; and / or, The housing is provided with a sand suction avoidance position and a third connection hole corresponding to the sand suction port for connecting to the mud pump; and / or, The housing is provided with a valve block avoidance position corresponding to the valve block of the gear box; and / or, One gear box is provided with at least one damping unit; and / or, The first connecting hole is arranged away from the groove.

5. The slot milling machine according to claim 1, characterized in that: The shock absorbing device further comprises: An L-shaped limit block, wherein the L-shaped limit block comprises a vertical limit block extending in the up-down direction and a horizontal limit block extending in the horizontal direction; the vertical limit block and the horizontal limit block are arranged approximately vertically; The gearbox includes a gearbox body and a T-shaped mounting frame, wherein the T-shaped mounting frame includes a horizontal connecting plate extending in a horizontal direction and a vertical connecting plate extending in an up-down direction, wherein the horizontal connecting plate is arranged above the vertical connecting plate; The two L-shaped limit blocks are relatively arranged on both sides of the transverse connecting plate, so that the transverse connecting plate is limited at the inner right angle of the L-shaped limit blocks; The end of the vertical limit block away from the lateral limit block is connected to the shell; the lateral connecting plate is connected to the connecting block through the second connecting hole.

6. The slot milling machine according to claim 1, characterized in that: The shock absorbing device further comprises: A lateral shock absorbing unit includes a buffer layer sandwiched between the tool holder body and the shell along the up-down direction.

7. The slot milling machine according to claim 6, characterized in that: The buffer layer includes a rubber layer and a mounting plate stacked in an up-and-down direction.

8. The slot milling machine according to claim 1, characterized in that: The tool holder body is connected to the housing of the shock absorbing device, and the tool holder body is arranged above the housing; The gear box is connected to the connecting block of the shock absorbing device, and the gear box is arranged below the connecting block; The milling wheel is mounted on the output shaft of the gear box.

9. A shock absorbing device, characterized in that: include: a housing and at least one shock absorbing unit; A groove is formed on the lower end surface of the housing close to the gear box, corresponding to each of the damping units, and the damping unit is accommodated and fixed in the groove; The shock absorbing unit comprises at least one connecting block, a rubber layer and at least one outer guard plate; the rubber layer is arranged around the outer periphery of the connecting block in a horizontal direction; the outer guard plate is arranged around the outer periphery of the rubber layer in a horizontal direction, so that the rubber layer is sandwiched between the connecting block and the outer guard plate, and the plate surface of the outer guard plate is in contact with the side wall of the groove; The upper end surface of the housing close to the tool holder body is provided with a first connecting hole for connecting with the tool holder body; The lower end surface of the connecting block close to the gear box is provided with a second connecting hole for connecting with the gear box.

10. The shock absorbing device according to claim 9, characterized in that: The shock absorbing device is arranged between the tool holder body and the working device, and is used for buffering the impact between the tool holder body and the working device.

11. The shock absorbing device according to claim 9, characterized in that: The shock absorbing device is further used to buffer the impact between the gear box and the milling wheel.

12. The shock absorbing device according to claim 9, characterized in that: include: A gap is provided between two adjacent outer guard plates in the horizontal direction, and a keyway is provided on the side wall of the groove corresponding to the gap; a flat key is installed in the gap and the keyway, a part of the flat key is located in the gap, and another part of the flat key is located in the keyway; and / or, The rubber layer is bonded to the connecting block; and / or, The outer guard plate is bonded to the rubber layer; and / or, The housing is provided with a sand suction avoidance position and a third connection hole corresponding to the sand suction port for connecting to the mud pump; and / or, The housing is provided with a valve block avoidance position corresponding to the valve block of the gear box; and / or, One gear box is provided with at least one damping unit; and / or, The first connecting hole is arranged away from the groove.

13. The shock absorbing device according to claim 9, characterized in that: include: An L-shaped limit block, wherein the L-shaped limit block comprises a vertical limit block extending in the up-down direction and a horizontal limit block extending in the horizontal direction; the vertical limit block and the horizontal limit block are arranged approximately vertically; The gearbox includes a gearbox body and a T-shaped mounting frame, wherein the T-shaped mounting frame includes a horizontal connecting plate extending in a horizontal direction and a vertical connecting plate extending in an up-down direction, wherein the horizontal connecting plate is arranged above the vertical connecting plate; The two L-shaped limit blocks are relatively arranged on both sides of the transverse connecting plate, so that the transverse connecting plate is limited at the inner right angle of the L-shaped limit blocks; The end of the vertical limit block away from the lateral limit block is connected to the shell; the lateral connecting plate is connected to the connecting block through the second connecting hole.

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