A quick-change tool holder, a milling drum and a milling machine

Abstract

The present application relates to the technical field of road surface processing machinery, and more particularly to a quick-change tool holder, a milling drum and a milling machine, a fixing shank is provided with a first pressing surface, a tool holder is provided with a first connecting hole and a second connecting hole which are arranged in communication with each other; a locking piece is movably connected in the first connecting hole, a wedge-shaped pin shaft which can be in abutting contact with the locking piece is arranged in the second connecting hole, and the wedge-shaped pin shaft is provided with a second pressing surface which can be in extrusion contact with the first pressing surface. In the present application, the connecting operation of the tool holder and the tooth sleeve is simple and stable; during work, almost all the load is borne by the wedge-shaped pin shaft, and the load borne by the locking piece can be ignored, the locking piece will not be deformed, the position of the wedge-shaped pin shaft can be effectively maintained, and the reliable connection between the tool holder and the tooth sleeve can be maintained; when the tooth sleeve and the tool holder need to be removed for maintenance, the locking piece is removed, the wedge-shaped pin shaft is pulled out, and the fixing shank can be pulled out from the first mounting hole, which is convenient and fast.

Description

Technical Field

[0001] This invention relates to the technical field of road surface processing machinery, and more specifically, to a quick-change tool holder, a milling drum, and a milling machine. Background Technology

[0002] Milling machines are used to mill damaged layers of asphalt pavement to facilitate the subsequent laying of a new layer. The milling drum is the core component of the milling machine, directly acting on the asphalt pavement. Since asphalt is relatively hard, the milling cutters require maintenance and repair after a period of use, and they also wear out over time. The milling cutter head is mounted on a cutter holder, but when the cutter head wears out, the entire cutter holder needs to be cut off and re-welded, which is cumbersome on-site and makes it difficult to control positioning accuracy. Therefore, a quick-change cutter holder is needed. A quick-change cutter holder mainly consists of a base and a gear sleeve. The cutter head is installed in the gear sleeve, and the gear sleeve is installed in the cutter holder. When the cutter head wears out, the cutter head is replaced; when the gear sleeve wears out, the gear sleeve is replaced.

[0003] Chinese patent CN205662823U discloses a tool holder, which includes a base, a clamping seat, and a positioning member. The base includes a fitting protrusion, an arc-shaped receiving hole, and a positioning hole. The positioning member is a combination of a pin and a bolt that can be tightened and then expanded. The positioning member is stably positioned in the positioning hole of the base by the expansion of the pin, and the positioning member abuts against the limiting groove of the receiving arc-shaped column, thereby realizing quick switching between the base and the clamping seat. However, in the above solution, firstly, the bolt is directly stressed, and the force on the toothed sleeve is directly transmitted to the bolt, which will cause the bolt to deform, thus increasing the difficulty of quick disassembly; secondly, the positioning component is located in the tool holder hole, and it is difficult for the positioning component to generate a preload on the toothed sleeve when the bolt is tightened, which makes the toothed sleeve easy to loosen in the tool holder. In the case of cyclic milling of the road surface, the frequent vibration can easily cause the bolt connection to loosen, resulting in the toothed sleeve falling out; finally, the positioning component needs to be drilled to screw the bolt into it, which means that the bolt size cannot be too large, and the bolt cannot withstand lateral loads, which cannot meet the actual working requirements of the toothed sleeve and the positioning component with large forces.

[0004] Chinese patent CN102561163A discloses a tool holder and a tool holder system having a tool holder and a base component. The fixing mechanism moves into the receiving opening of the fixing mechanism via a helical motion and presses against the loading surface of the fixing mechanism. The fixing handle presses its supporting area against the corresponding supporting area of ​​the base component. The supporting area is configured with two supporting surface areas that extend at an angle or inclined relative to each other. In the above solution, the quick-release of the gear sleeve and the tool holder is achieved through a threaded structure. The structure is simple, and the tool holder is easy to disassemble. However, when the gear sleeve is subjected to a large force, the threads are prone to wear or damage. Once the threads are damaged, it is difficult to reinstall and fix the gear sleeve to the tool holder.

[0005] Chinese patent CN114026290A discloses a tool holder system in which a tapered abutment cavity, a shank receiving cavity, and a clamping wedge receiving cavity are successively adjacent to each other in the inner cavity of the tool holder. The tapered abutment cavity is at least partially complementary to the abutment cone of the milling cutter and at least partially has a hollow conical or funnel-shaped extending inner circumference surface. This inner circumference surface tapers radially to the push-in axis R from the tool receiving opening. A clamping screw is provided, and tightening the clamping screw causes the tapered abutment cavity and the abutment cone to abut against each other. The above solution achieves quick assembly between the tool shank and the tool holder. This type of milling cutter is difficult to disassemble and inconvenient for maintenance.

[0006] In summary, although various quick-release or quick-installation methods for gear sleeves and bases have emerged in the existing technology, quick release often comes at the cost of product connection reliability. It is impossible to have both quick-release function and connection reliability, which will affect the product's service life and increase the difficulty of product maintenance. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of existing technologies that cannot simultaneously achieve quick-release functionality and reliable connection, and to provide a quick-change tool holder, milling drum and milling machine that not only enables quick release of the base and gear sleeve, but also ensures that the connecting parts between the base and gear sleeve are not easily deformed and that the connection between the two is reliable.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0009] A quick-change tool holder is provided, comprising a detachably connected tool holder and a toothed sleeve. The toothed sleeve includes a fixed shank. The tool holder has a first mounting hole for insertion into the fixed shank. The fixed shank has a first clamping surface on its outer periphery. The tool holder has a first connecting hole and a second connecting hole that are interconnected. The second connecting hole and the first mounting hole at least partially overlap. A locking element is movably connected in the first connecting hole. A wedge-shaped pin is provided in the second connecting hole that can abut against the locking element. The wedge-shaped pin has a second clamping surface that can press against the first clamping surface. The clamping force between the first clamping surface and the second clamping surface includes at least a first component force along the axial direction of the fixed shank and a second component force along the radial direction of the fixed shank.

[0010] The quick-change tool holder of the present invention has a fixed shank that inserts into a first mounting hole to achieve initial connection between the tool holder and the gear sleeve. The second connecting hole at least partially overlaps with the first mounting hole, so that when the wedge pin passes through the second connecting hole, the second clamping surface on the wedge pin presses against the first clamping surface. A locking member is movably connected to the first connecting hole and can move relative to the first connecting hole towards or away from the wedge pin. When the locking member moves towards the wedge pin, the second clamping surface presses the first clamping surface obliquely downwards, forming a first component force along the axial direction of the fixed shank and a second component force along the radial direction of the fixed shank, thereby creating a preload force on the gear sleeve and the tool holder, making the connection between the gear sleeve and the tool holder more reliable. When it is necessary to disassemble the gear sleeve and the tool holder, the locking member is removed, the wedge pin is removed, and the fixed shank is pulled out of the first mounting hole. The quick-change tool holder of this invention, during tool head installation, interacts with the wedge pin shaft when the gear sleeve is subjected to the force transmitted by the tool head. The load direction is perpendicular to the axis of the locking element, and the radial and circumferential loads on the locking element are very small and negligible. Therefore, the locking element is not prone to deformation, and the connection between the gear sleeve and the tool holder is highly reliable. In summary, the quick-change tool holder of this invention offers the following advantages: the connection between the tool holder and the gear sleeve is simple and stable; during operation, almost all the load is borne by the wedge pin bearing, and the load distributed to the locking element is negligible, preventing deformation of the locking element and effectively maintaining the position of the wedge pin shaft, thereby maintaining a reliable connection between the tool holder and the gear sleeve; when it is necessary to remove the gear sleeve and the tool holder for maintenance, the locking element can be removed, the wedge pin shaft can be taken out, and the fixing handle can be pulled out from the first mounting hole, which is convenient and quick.

[0011] Furthermore, the first pressing surface is a first plane, and the outer periphery of the fixing handle is also provided with a third plane. The first plane and the third plane are connected to form a recess. When the first pressing surface and the second pressing surface are pressed together, the third plane is tangent to the outer peripheral surface of the wedge pin, or the third plane is parallel to the tangent plane of the outer peripheral surface of the wedge pin. The second pressing surface is a second plane, the cross-section of the wedge pin is arc-shaped, and the central angle of the arc is greater than 180°. The first pressing surface and the second pressing surface are respectively set as the first plane and the second plane, which can be in close contact and are easy to process. The recess formed by the first plane and the third plane is used to accommodate part of the wedge pin. The position of the third plane is limited to avoid hindering the movement of the wedge pin. The shape of the wedge pin is designed to ensure both the pressing effect and the strength of the wedge pin.

[0012] Furthermore, it also includes a third connecting hole. The first and third connecting holes are respectively connected to the two ends of the second connecting hole. A sealing element is detachably connected to the third connecting hole. The diameter of the second connecting hole gradually decreases from the first connecting hole to the third connecting hole. The first, second, and third connecting holes are interconnected to form a through hole penetrating the tool holder, which facilitates machining. The sealing element is installed in the third connecting hole to create a relatively sealed environment in the through hole, preventing corrosion of components such as the tool holder and wedge pin. The diameter of the second connecting hole is designed so that when the wedge pin moves axially towards the sealing element, the clamping force of the second clamping surface on the first clamping surface increases, thereby creating a preload between the tool holder and the gear sleeve.

[0013] Furthermore, the locking member has an external thread, and the first connecting hole has an internal thread, with the locking member threadedly connected to the first connecting hole. This threaded connection allows the locking member to be screwed in, moving the wedge pin axially towards the sealing member, thereby creating a preload between the tool holder and the gear sleeve, simplifying operation. To remove the gear sleeve and tool holder, simply unscrew the locking member to release the locking force on the wedge pin, and then tap the wedge pin towards the locking member to remove it.

[0014] Furthermore, a limiting component for preventing the fixed handle from rotating is provided between the side of the fixed handle away from the first pressing surface and the wall of the first mounting hole, thereby forming at least two limiting points on the two opposite sides of the fixed handle to effectively prevent the toothed sleeve and the tool holder from shaking relative to each other during operation, thus meeting the needs of scenarios where the toothed sleeve is subjected to a large load during operation.

[0015] Furthermore, the limiting component includes a limiting protrusion disposed on the wall of the first mounting hole and a limiting recess disposed on the outer periphery of the fixed shank, or the limiting component includes a limiting recess disposed on the wall of the first mounting hole and a limiting protrusion disposed on the outer periphery of the fixed shank, wherein the limiting protrusion and the limiting recess cooperate with each other to effectively prevent the fixed shank and the tool holder from rotating relative to each other.

[0016] Furthermore, the limiting protrusions and limiting recesses are at least two sets arranged in parallel, and the axes of the limiting protrusions and limiting recesses are parallel to the axis of the fixing handle, thereby further improving the effect of preventing relative rotation.

[0017] Furthermore, the limiting component includes a first recess on the wall of the first mounting hole and a second recess on the outer periphery of the fixing handle. The first and second recesses surround each other to form a limiting cavity, and a limiting element is connected within the limiting cavity. The first and second recesses are machined on the wall of the first mounting hole and the outer periphery of the fixing handle, respectively, which is simple to manufacture. Inserting the limiting element into the limiting cavity also provides a good limiting effect.

[0018] Furthermore, the gear sleeve also includes a support body and a mounting body, which are arranged sequentially. The lower surface of the support body includes a first contact surface and a second contact surface, and the upper surface of the tool holder includes a third contact surface and a fourth contact surface. The first contact surface is in contact with the third contact surface, and the second contact surface is in contact with the fourth contact surface. The first and second contact surfaces are arranged at an angle, and the third and fourth contact surfaces are also arranged at an angle, which can increase the contact surface between the gear sleeve and the tool holder and reduce the contact rigidity between them.

[0019] Furthermore, both the second and fourth mating surfaces are fourth planes. The fourth plane and the first pressing surface are located on opposite sides of the axis of the fixed shank. A first acute angle is formed between the fourth plane and the axis of the fixed shank, and a second acute angle is formed between the first pressing surface and the axis of the fixed shank. The first acute angle is greater than the second acute angle. The arrangement of both the second and fourth mating surfaces as fourth planes facilitates their machining. The relative positions of the first pressing surface and the fourth plane place the second and fourth mating surfaces behind the tool holder. Under the action of the wedge pin, they press the toothed sleeve downwards and backwards, thereby creating a preload between the toothed sleeve and the tool holder.

[0020] Furthermore, the first contact surface includes two sets of disconnected first support surfaces, and the third contact surface includes two sets of disconnected third support surfaces. An angle of 90° to 180° is formed between the two sets of first support surfaces and between the two sets of third support surfaces. The obtuse angle between the two sets of first and third support surfaces effectively prevents the gear sleeve and tool holder from wobbling, and also increases the contact area between them, promoting uniform force distribution.

[0021] Furthermore, both sets of first support surfaces and both sets of third support surfaces are curved surfaces. The curved design of the first and third support surfaces further improves the effect of preventing swaying and increasing the contact area.

[0022] Furthermore, a first recess is provided at the connection between the first and second mating surfaces, and a protrusion is formed at the transition connection between the first recess and the first mating surface. A second recess is provided at the connection between the third and fourth mating surfaces, and the protrusion engages with the second recess for positioning. The engagement of the protrusion with the second recess for positioning also serves to prevent wear.

[0023] Furthermore, the mounting body is provided with a second mounting hole for mounting the cutter head, and the support body has a notch communicating with the second mounting hole. The notch facilitates the insertion of a cutter head removal tool, thereby simplifying the removal of the cutter head.

[0024] Furthermore, the notch axis is perpendicular to the second mounting hole axis, and the width of the notch is smaller than the diameter of the second mounting hole. The size of the notch prevents the cutter head from protruding, and the perpendicularity of the notch axis to the second mounting hole axis facilitates the disassembly of the cutter head.

[0025] Furthermore, the upper surface of the support is provided with a chip removal structure, which extends from the periphery of the mounting body towards one side of the support. The chip removal structure promptly removes chips generated during the processing, preventing wear caused by chip residue.

[0026] Furthermore, the chip removal structure includes a first chip removal surface and a second chip removal surface. The first chip removal surface extends obliquely downward from the periphery of the mounting body towards one side of the support body, and the second chip removal surface extends obliquely downward from both sides of the first chip removal surface towards the upper surface of the support body. By designing chip removal in two directions—the first and second chip removal surfaces—chips are discharged from different directions, thereby improving chip removal efficiency.

[0027] The present invention also provides a milling drum, including a roller, a cutter head, and a quick-change tool holder as described above, wherein the cutter head is mounted on a gear sleeve, the gear sleeve is mounted on a tool holder, and the tool holder is mounted on the outer periphery of the roller.

[0028] Because the connection between the tool holder and the gear sleeve is simple and stable, and the load during operation is almost entirely borne by the wedge pin bearing, the load distributed to the locking element is negligible, the locking element will not deform, and it can effectively maintain the position of the wedge pin, thus maintaining a reliable connection between the tool holder and the gear sleeve. When it is necessary to remove the gear sleeve and tool holder for maintenance, simply remove the locking element, remove the wedge pin, and pull the fixing handle out of the first mounting hole, which is convenient and quick. Therefore, the milling drum of the present invention has good working stability, long service life, and is easy to maintain.

[0029] Furthermore, several cutting heads and quick-change tool holders are spirally arranged on the outer periphery of the roller. When disassembling the gear sleeve, the locking element is located on the side, providing ample disassembly space. The wedge-shaped pin protruding from the second connecting hole also provides ample disassembly space, making disassembly convenient.

[0030] The present invention also provides a milling machine, including a frame and a milling drum as described above, the milling drum being disposed on the frame.

[0031] The milling machine of this invention features a simple and stable connection between the cutter holder and the gear sleeve. During operation, almost all the load is borne by the wedge pin bearing, and the load distributed to the locking element is negligible, preventing deformation of the locking element and effectively maintaining the position of the wedge pin, thus ensuring a reliable connection between the cutter holder and the gear sleeve. When maintenance is required, the locking element is removed, the wedge pin is taken out, and the fixing handle is pulled out from the first mounting hole, making the process convenient and quick. Therefore, the milling machine of this invention offers good operational stability, a long service life, and easy maintenance.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] The quick-change tool holder of this invention features a simple and stable connection between the tool holder and the gear sleeve. During operation, almost all the load is borne by the wedge pin bearing, and the load distributed to the locking element is negligible, preventing deformation of the locking element. This effectively maintains the position of the wedge pin, thus ensuring a reliable connection between the tool holder and the gear sleeve. When it is necessary to remove the gear sleeve and tool holder for maintenance, simply remove the locking element, take out the wedge pin, and pull the fixing handle out of the first mounting hole. This is convenient and quick.

[0034] The milling drum and milling machine of the present invention have good working stability, long service life, and are easy to operate and maintain. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of a quick-change tool holder.

[0036] Figure 2 This is a schematic diagram of the internal structure of a quick-change tool holder at one angle.

[0037] Figure 3 This is a schematic diagram of the internal structure of a quick-change tool holder from another angle.

[0038] Figure 4 This is a schematic diagram of the internal structure of another quick-change tool holder;

[0039] Figure 5 A schematic diagram of the first angle of the toothed sleeve of the quick-change tool holder;

[0040] Figure 6 A schematic diagram of the second angle of the toothed sleeve of the quick-change tool holder;

[0041] Figure 7 A schematic diagram of the second angle of the toothed sleeve of the quick-change tool holder;

[0042] Figure 8 A schematic diagram of the first angle of the tool holder of a quick-change tool holder;

[0043] Figure 9A schematic diagram of the second angle of the tool holder of a quick-change tool holder;

[0044] Figure 10 This is a schematic diagram of the internal structure of a quick-change tool holder.

[0045] Figure 11 A schematic diagram of the cross-section of the wedge pin of a quick-change tool holder;

[0046] In the attached diagram: 100, toothed sleeve; 110, fixing handle; 111, first pressing surface; 112, third plane; 113, limiting recess; 114, first recess; 120, support body; 121, first supporting surface; 122, second mating surface; 123, first recess; 124, protrusion; 125, notch; 126, first chip removal surface; 127, second chip removal surface; 130, mounting body; 131, second mounting hole; 200. Tool holder; 210, first mounting hole; 211, limiting protrusion; 212, second recess; 220, first connecting hole; 230, second connecting hole; 240, third connecting hole; 250, fourth mating surface; 260, third support surface; 270, second recess; 280, third mounting hole; 300, tool head; 400, wedge pin; 410, second clamping surface; 500, locking element; 600, sealing element; 700, limiting element. Detailed Implementation

[0047] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0048] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0049] Example 1

[0050] This embodiment is a first embodiment of a quick-change tool holder, including a detachably connected tool holder 200 and a toothed sleeve 100. The toothed sleeve 100 includes a fixed shank 110. The tool holder 200 has a first mounting hole 210 for insertion into the fixed shank 110. The fixed shank 110 has a first pressing surface 111 on its outer periphery. The tool holder 200 has a first connecting hole 220 and a second connecting hole 230 that are interconnected. The second connecting hole 230 and the first mounting hole 210 at least partially overlap. A locking member 500 is movably connected in the first connecting hole 220. A wedge-shaped pin 400 that can abut against the locking member 500 is provided in the second connecting hole 230. The wedge-shaped pin 400 has a second pressing surface 410 that can press against the first pressing surface 111. The pressing force between the first pressing surface 111 and the second pressing surface 410 includes at least a first component force along the axial direction of the fixed shank 110 and a second component force along the radial direction of the fixed shank 110. Figures 1 to 3 As shown. The fixed handle 110 is cylindrical, and the first mounting hole 210 is a cylindrical hole that mates with the fixed handle 110. Inserting the fixed handle 110 into the first mounting hole 210 along its axial direction completes the initial installation and positioning of the tool holder 200 and the gear sleeve 100. The cylindrical design facilitates machining. The second connecting hole 230 at least partially overlaps with the first mounting hole 210, and the angle between the axis of the second connecting hole 230 and the axis of the first mounting hole 210 can approach 90°. Adapting to the outer circumferential shape of the wedge pin 400, the second connecting hole 230 is a wedge-shaped hole. The wedge pin 400 moves axially within the wedge-shaped hole along its wedge axis. The depth of the wedge pin 400 within the first mounting hole 210 varies, thereby changing the clamping force of the second clamping surface 410 on the first clamping surface 111. In addition, in this embodiment, the locking member 500 and the wedge pin 400 are two components that are not connected. The locking member 500 only exerts a force on the wedge pin 400 when it moves axially. Movements in other directions will not affect the state of the wedge pin 400. In this way, the locking member 500 and the wedge pin 400 are independent of each other when bearing loads.

[0051] In this embodiment, the fixing handle 110 is inserted into the first mounting hole 210 to achieve a preliminary connection between the tool holder 200 and the gear sleeve 100. The second connecting hole 230 and the first mounting hole 210 at least partially overlap, so that when the wedge pin 400 passes through the second connecting hole 230, the second pressing surface 410 on the wedge pin 400 presses against the first pressing surface 111. The locking member 500 is movably connected to the first connecting hole 220 and can move relative to the first connecting hole 220 in a direction closer to or away from the wedge pin 400. When the locking member 500 moves toward the wedge pin 400, the second pressing surface 410 presses the first pressing surface 111 obliquely downward, forming a first component force along the axial direction of the fixed handle 110 and a second component force along the radial direction of the fixed handle 110, thereby forming a preload force on the gear sleeve 100 and the tool holder 200, making the connection between the gear sleeve 100 and the tool holder 200 more reliable; when it is necessary to disassemble the gear sleeve 100 and the tool holder 200, the locking member 500 is removed, the wedge pin 400 is removed, and the fixed handle 110 is pulled out from the first mounting hole 210.

[0052] In this embodiment, the first pressing surface 111 is a first plane, and the second pressing surface 410 is a second plane. Thus, the preload between the gear sleeve 100 and the tool holder 200 is formed between the first and second planes. Figure 2 As shown. The first pressing surface 111 and the second pressing surface 410 are respectively set as a first plane and a second plane. The two planes can be in close contact, and under the action of the locking member 500, the second pressing surface 410 can slide relative to the first pressing surface 111, and it is easy to process. The second pressing surface 410 is a second plane, the cross-section of the wedge-shaped pin 400 is arc-shaped, and the central angle α of the arc is greater than 180°, ensuring both the pressing effect and the strength of the wedge-shaped pin 400. Figure 11 As shown. Additionally, in this embodiment, the outer periphery of the fixing handle 110 is also provided with a third plane 112. The first plane and the third plane 112 connect to form a recessed area for accommodating the wedge-shaped pin 400, which facilitates processing, such as... Figure 5As shown; when the first pressing surface 111 and the second pressing surface 410 are pressed together, the third plane 112 is tangent to the outer peripheral surface of the wedge pin 400, or the third plane 112 is parallel to the tangent plane of the outer peripheral surface of the wedge pin 400. When the third plane 112 is parallel to the tangent plane of the outer peripheral surface of the wedge pin 400, a gap is provided between the third plane 112 and the outer peripheral surface of the wedge pin 400: on the one hand, as the depth of the wedge pin 400 in the first mounting hole 210 increases, the fixing handle 110 will move downward, and this gap provides movement space; on the other hand, when the contact surface between the toothed sleeve 100 and the tool holder 200 wears, under the action of preload, the fixing handle 110 can move obliquely downward within the first mounting hole 210 by a distance equal to the width of the gap, and the gap plays a compensating role. When the third plane 112 is tangent to the outer peripheral surface of the wedge pin 400, a stable preload is formed between the gear sleeve 100 and the tool holder 200. At this time, the structure is compact and the relative position of the gear sleeve 100 and the tool holder 200 can be effectively maintained.

[0053] The quick-change tool holder in this embodiment further includes a third connecting hole 240. The first connecting hole 220 and the third connecting hole 240 are respectively connected to the two ends of the second connecting hole 230. A sealing member 600 is detachably connected inside the third connecting hole 240. The diameter of the second connecting hole 230 gradually decreases from the first connecting hole 220 to the third connecting hole 240. Figure 4 , Figure 10 As shown. The first connecting hole 220, the second connecting hole 230, and the third connecting hole 240 are interconnected to form a through hole with a variable diameter that passes through the tool holder 200, which facilitates machining. A sealing element 600 is provided in the third connecting hole 240 to form a relatively sealed environment in the through hole, avoiding corrosion of components such as the tool holder 200 and the wedge pin 400. The diameter of the second connecting hole 230 is set so that when the wedge pin 400 moves towards the sealing element 600, the clamping force of the second clamping surface 410 on the first clamping surface 111 increases, thereby forming a preload between the tool holder 200 and the gear sleeve 100. The diameter of the first connecting hole 220 is equal to the maximum diameter of the second connecting hole 230, and the diameter of the third connecting hole 240 is equal to the minimum diameter of the second connecting hole 230. The width of the first connecting hole 220 is greater than the width of the locking member 500, so that the locking member 500 is hidden in the first connecting hole 220 and does not protrude from the first connecting hole 220, thereby ensuring the aesthetic appearance of the product.

[0054] Specifically, in this embodiment, the locking member 500 has an external thread, and the first connecting hole 220 has an internal thread. The locking member 500 is threadedly connected to the first connecting hole 220. With this threaded connection, screwing in the locking member 500 moves the wedge-shaped pin 400 towards the sealing member 600, thereby creating a preload between the tool holder 200 and the gear sleeve 100, simplifying the operation. To remove the gear sleeve 100 and the tool holder 200, unscrew the locking member 500 to release the locking force on the wedge-shaped pin 400, and tap the wedge-shaped pin 400 towards the locking member 500 to remove it. It should be noted that in this embodiment, the threaded connection between the locking member 500 and the first connecting hole 220 is a preferred option for simplifying operation and achieving a stable connection, and is not intended to limit the invention.

[0055] This embodiment is implemented in the following specific manner:

[0056] When installing the cutter head 300, insert the fixing shank 110 into the first mounting hole 210 until the lower surface of the toothed sleeve 100 contacts and fits against the upper surface of the cutter holder 200. Insert the wedge pin 400 from the first connecting hole 220 into the second connecting hole 230, and tighten the locking member 500 towards the third connecting hole 240. During the tightening of the locking member 500, the depth of the wedge pin 400 in the first mounting hole 210 increases, and the second pressing surface 410 presses the first pressing surface 111 tighter and tighter, forming a preload between the toothed sleeve 100 and the cutter holder 200. This completes the connection between the toothed sleeve 100 and the cutter holder 200, ensuring a stable connection and easy operation. During operation, almost all the load is borne and distributed by the wedge pin 400. The load on the locking element 500 is negligible, and the locking element 500 will not deform, effectively maintaining the position of the wedge pin 400 and thus maintaining a reliable connection between the tool holder 200 and the gear sleeve 100. When it is necessary to remove the gear sleeve 100 and the tool holder 200 for maintenance, first remove the sealing element 600 and the locking element 500, insert the removal tool into the third connecting hole 240 and tap the wedge pin 400. The wedge pin 400 will loosen from the second connecting hole 230 and gradually come out from the second connecting hole 230 and the third connecting hole 240, thus releasing the connection between the gear sleeve 100 and the tool holder 200. The gear sleeve 100 and the tool holder 200 can be separated by pulling the fixing handle 110 out of the first mounting hole 210, which is convenient and quick.

[0057] Example 2

[0058] This embodiment is a second embodiment of the quick-change tool holder. Similar to the first embodiment, the difference lies in that a limiting component is provided between the side of the fixed handle 110 away from the first pressing surface 111 and the wall of the first mounting hole 210 to prevent rotation of the fixed handle 110. This creates at least two limiting points on opposite sides of the fixed handle 110, effectively preventing relative wobbling between the gear sleeve 100 and the tool holder 200 during operation, thus meeting the requirements of scenarios where the gear sleeve 100 is subjected to high loads during operation. The limiting component is arranged axially along the fixed handle 110 to restrict circumferential rotation of the fixed handle 110. In addition, it should be noted that the limiting component not only restricts the rotation of the fixed shank 110 relative to the tool holder 200, but also guides the direction of the fixed shank 110 entering the first mounting hole 210. This ensures that when the fixed shank 110 is installed into the first mounting hole 210, the recess on the fixed shank 110 corresponds to the position of the second connecting hole 230. By inserting the wedge pin 400 into the second connecting hole 230 and installing the locking member 500 in the first connecting hole 220, the connection between the tool holder 200 and the gear sleeve 100 can be quickly completed.

[0059] Specifically, in this embodiment, the limiting component includes a limiting protrusion 211 disposed on the wall of the first mounting hole 210 and a limiting recess 113 disposed on the outer periphery of the fixing handle 110. The limiting protrusion 211 and the limiting recess 113 cooperate with each other to effectively prevent relative rotation between the fixing handle 110 and the tool holder 200. Alternatively, the limiting component includes a limiting recess 113 disposed on the wall of the first mounting hole 210 and a limiting protrusion 211 disposed on the outer periphery of the fixing handle 110. The limiting protrusion 211 and the limiting recess 113 cooperate with each other to effectively prevent relative rotation between the fixing handle 110 and the tool holder 200. Figure 3 As shown. When the second pressing surface 410 presses against the first pressing surface 111, under the action of its pressing force, the limiting protrusion 211 and the limiting recess 113 move closer to each other, and the limiting effect of the limiting protrusion 211 and the limiting recess 113 is improved. The cross-section of both the limiting protrusion 211 and the limiting recess 113 can be set as a semi-cylindrical structure. The length of the semi-cylindrical structure is set as long as possible. In this embodiment, the length of the semi-cylindrical structure exceeds one-half of the length of the fixing handle 110 but is less than two-thirds of the length of the fixing handle 110, so as to obtain both a better limiting effect and better mechanical strength.

[0060] The limiting protrusions 211 and limiting recesses 113 are arranged in at least two parallel sets, and the axes of the limiting protrusions 211 and limiting recesses 113 are parallel to the axis of the fixed handle 110, thereby further improving the effect of preventing relative rotation. When the limiting protrusions 211 and limiting recesses 113 are arranged in two parallel sets, the recesses on the outer periphery of the fixed handle 110 have a symmetrical structure, and the two sets of limiting recesses 113 or limiting protrusions 211 are also symmetrically arranged on both sides of the axis of the fixed handle 110. In this way, one limiting position in the recess, two limiting positions in the two sets of limiting recesses 113 or limiting protrusions 211, and three limiting positions roughly form a triangle in the radial direction of the fixed handle 110, thereby forming a very stable limiting position between the fixed handle 110 and the tool holder 200. Furthermore, the recessed positions are positioned at the midpoints of the two sets of limiting recesses 113 or limiting protrusions 211 along the length direction, thus providing three limiting points in the axial direction of the fixed shank 110. These three limiting points roughly form a triangle in the radial direction of the fixed shank 110, thereby creating a very stable limiting effect between the fixed shank 110 and the tool holder 200. Of course, the positioning of the recessed positions and the limiting protrusions 211 or limiting recesses 113 is a preferred option to obtain the optimal limiting effect and is not intended to limit the invention.

[0061] This embodiment is implemented in the following specific manner:

[0062] When installing the cutter head 300, align the limiting protrusion 211 with the limiting recess 113, and slide the fixing handle 110 along the limiting protrusion 211 or the limiting recess 113 into the first mounting hole 210 until the lower surface of the toothed sleeve 100 and the upper surface of the tool holder 200 are in contact and fit together, and the position of the recess corresponds to the position of the second connecting hole 230. Then, insert the wedge pin 400 from the first connecting hole 220 into the second connecting hole 230, and tighten the locking member 500 towards the third connecting hole 240. During the tightening of the locking member 500, the depth of the wedge pin 400 in the first mounting hole 210 increases, and the second pressing surface 410 presses the first pressing surface 111 tighter and tighter, forming a preload between the toothed sleeve 100 and the tool holder 200, thus completing the connection between the toothed sleeve 100 and the tool holder 200. The connection is stable and the operation is simple. During operation, almost all the load is borne by the wedge pin 400, and the load distributed to the locking member 500 is negligible. The locking member 500 will not deform and can effectively maintain the position of the wedge pin 400, thereby maintaining a reliable connection between the tool holder 200 and the gear sleeve 100. When it is necessary to remove the gear sleeve 100 and the tool holder 200 for maintenance, first remove the sealing member 600 and the locking member 500, insert the removal tool into the third connecting hole 240 and tap the wedge pin 400. The wedge pin 400 will loosen from the second connecting hole 230 and gradually come out from the second connecting hole 230 and the third connecting hole 240. The connection between the gear sleeve 100 and the tool holder 200 will be released. The separation of the gear sleeve 100 and the tool holder 200 can be completed by pulling the fixing handle 110 out of the first mounting hole 210. It is convenient and quick.

[0063] Example 3

[0064] This embodiment is the third embodiment of a quick-change tool holder. This embodiment is similar to Embodiment Two, except that the limiting component includes a first recess 114 located on the wall of the first mounting hole 210 and a second recess 212 located on the outer periphery of the fixing handle 110. The first recess 114 and the second recess 212 surround to form a limiting cavity, and a limiting member 700 is connected within the limiting cavity. Figure 4 , Figure 9As shown. Compared to Embodiment 2, the processing of the recessed metal material in this embodiment is simpler than the processing of the protruding part. The first recess 114 and the second recess 212 are respectively processed on the wall of the first mounting hole 210 and the outer periphery of the fixing handle 110, simplifying the processing. Specifically, the first recess 114 and the second recess 212 can be semi-cylindrical grooves of equal radius. The limiting member 700 is a cylindrical structure, which can be a solid cylinder or a hollow cylinder. During installation, the limiting member 700 can be inserted into the first recess 114 first, and then the fixing handle 110 can be inserted along the limiting member 700. Compared to Embodiment 2, this embodiment ensures good processing performance without adversely affecting the limiting performance of the limiting member 700.

[0065] This embodiment is similar to the implementation of Embodiment 2, except that the installation of the fixing handle 110 and the first mounting hole 210 is different. Specifically, in this embodiment, when installing the fixing handle 110, the limiting member 700 is first inserted into the first recess 114, and then the fixing handle 110 is inserted along the limiting member 700 until it is inserted into the first mounting hole 210 until the lower surface of the toothed sleeve 100 and the upper surface of the tool holder 200 are in contact and fit together, and the position of the recess corresponds to the position of the second connecting hole 230.

[0066] Example 4

[0067] This embodiment is the fourth embodiment of a quick-change tool holder. This embodiment is similar to any of the embodiments one through three, except that:

[0068] like Figures 5 to 6 As shown, the toothed sleeve 100 also includes a support body 120 and a mounting body 130, wherein the mounting body 130, the support body 120, and the fixing handle 110 are arranged sequentially, and the lower surface of the support body 120 includes a first contact surface and a second contact surface 122; as shown Figure 8 As shown, the upper surface of the tool holder 200 includes a third contact surface and a fourth contact surface 250. When the gear sleeve 100 and the tool holder 200 are installed, the first contact surface is in contact with the third contact surface, and the second contact surface 122 is in contact with the fourth contact surface 250. The first and second contact surfaces 122 are angled together, as are the third and fourth contact surfaces 250. By setting the contact surfaces of the tool holder 200 and the gear sleeve 100 as two angled planes, the contact area between the gear sleeve 100 and the tool holder 200 is increased, and the contact rigidity between them is reduced. Furthermore, the gear sleeve 100 serves as a guide and limiter during installation.

[0069] In this embodiment, both the second contact surface 122 and the fourth contact surface 250 are fourth planes. The fourth plane and the first pressing surface 111 are located on both sides of the axis of the fixed handle 110. A first acute angle is provided between the fourth plane and the axis of the fixed handle 110, and a second acute angle is provided between the first pressing surface 111 and the axis of the fixed handle 110. The first acute angle is greater than the second acute angle. The fact that both the second contact surface 122 and the fourth contact surface 250 are fourth planes facilitates the processing of the second contact surface 122 and the fourth contact surface 250. The relative positions of the first pressing surface 111 and the fourth planes place the second contact surface 122 and the fourth contact surface 250 on the rear side of the tool holder. Under the action of the wedge pin 400, the tooth sleeve 100 will be pressed downward and backward, thereby forming a preload between the tooth sleeve 100 and the tool holder 200.

[0070] The first contact surface includes two sets of disconnected first support surfaces 121, and the third contact surface includes two sets of disconnected third support surfaces 260. An included angle of 90° to 180° is formed between the two sets of first support surfaces 121 and the two sets of third support surfaces 260. Both the first support surfaces 121 and the third support surfaces 260 are planar. This arrangement divides the contact surface between the gear sleeve 100 and the tool holder 200 into three surfaces, further increasing the contact between them and reducing their contact rigidity. Furthermore, in this embodiment, the two sets of first support surfaces 121 and third support surfaces 260 are arranged at an obtuse angle. This effectively prevents the gear sleeve 100 and the tool holder 200 from shaking and increases the contact area between them, promoting uniform force distribution.

[0071] In addition, in this embodiment, a first recess 123 is provided at the connection between the first and second mating surfaces 122, and a protrusion 124 is formed at the transition connection between the first recess 123 and the first mating surface. A second recess 270 is provided at the connection between the third and fourth mating surfaces 250. The protrusion 124 cooperates with the second recess 270 for positioning. Figure 5 , Figure 8 As shown. In this embodiment, the protruding peak 124 cooperates with the second recessed portion 270, which not only serves as a limiting function but also prevents wear. Of course, in this embodiment, the protruding peak 124 can also be formed at the transition connection between the second recessed portion 270 and the third mating surface. In this case, the protruding peak 124 does not cooperate with the first recessed portion 123 for limiting.

[0072] This embodiment is similar to any of the embodiments one through four, except that it differs in the contact support between the tool holder 200 and the gear sleeve 100. Specifically, in this embodiment, when the fixing handle 110 is fully inserted into the first mounting hole 210, the first contact surface is in contact with the third contact surface, and the second contact surface 122 is in contact with the fourth contact surface 250. The contact between the first and third contact surfaces specifically involves the contact of two sets of first support surfaces 121 and two sets of third support surfaces 260. This effectively prevents the gear sleeve 100 and the tool holder 200 from shaking, and also increases the contact area between the gear sleeve 100 and the tool holder 200, promoting uniform force distribution.

[0073] Example 5

[0074] This embodiment is the fifth embodiment of a quick-change tool holder. This embodiment is similar to the fourth embodiment, except that: both sets of first support surfaces 121 and both sets of third support surfaces 260 are curved surfaces, which can further increase the contact area between the toothed sleeve 100 and the tool holder 200, and further improve the effect of preventing shaking and increasing contact.

[0075] In this embodiment, the projections of the two sets of first support surfaces 121 and third support surfaces 260 are approximately rectangular. The two sets of first support surfaces 121 are concave curved surfaces, specifically concave inward along the length of the rectangle. The two sets of third support surfaces 260 are convex curved surfaces, specifically convex outward along the length of the rectangle. The extent of the concavity and convexity can be determined by balancing the processing difficulty and the effects of preventing shaking and increasing contact.

[0076] Example 6

[0077] This embodiment is the sixth embodiment of a quick-change tool holder. This embodiment is similar to any of the embodiments one through five, except that: Figure 5 As shown, the mounting body 130 is provided with a second mounting hole 131 for mounting the cutter head 300, and the support body 120 is provided with a notch 125 that communicates with the second mounting hole 131. The notch 125 facilitates the insertion of the tool for disassembling the cutter head 300, thereby facilitating the disassembly operation of the cutter head 300.

[0078] In order to achieve the insertion of the disassembly tool, in this embodiment, as follows: Figure 8 As shown, a third mounting hole 280 is also correspondingly provided on the tool holder 200. The third mounting hole 280 is connected to the notch 125 and serves as an extension of the notch 125. The third mounting hole 280 and the notch 125 are connected to form a through hole with one end open. The bottom surface of the through hole can be designed as a downward slope to guide the debris generated during installation and disassembly to be discharged.

[0079] In this embodiment, the axis of the notch 125 is perpendicular or substantially perpendicular to the axis of the second mounting hole 131. This allows the tool to apply force along the axial direction of the cutter head 300 when the disassembly tool is inserted, facilitating rapid disassembly of the cutter head 300. Furthermore, in this embodiment, the width of the notch 125 is smaller than the diameter of the second mounting hole 131, and the distance between the two connecting edges of the notch 125 and the second mounting hole 131 is smaller than the diameter of the second mounting hole 131, to prevent the cutter head 300 from detaching from the second mounting hole 131 through the notch 125.

[0080] Example 7

[0081] This embodiment is the seventh embodiment of a quick-change tool holder. This embodiment is similar to any of the embodiments one to six, except that: the upper surface of the support body 120 is provided with a chip removal structure. The chip removal structure extends from the outer periphery of the mounting body 130 to one side of the support body 120 to promptly remove the chips generated during the machining process and avoid wear caused by chip residue.

[0082] In this embodiment, as Figure 7 As shown, the chip removal structure includes a first chip removal surface 126 and a second chip removal surface 127. The first chip removal surface 126 extends obliquely downward from the outer periphery of the mounting body 130 to one side of the support body 120, and the second chip removal surface 127 extends obliquely downward from both sides of the first chip removal surface 126 to the upper surface of the support body 120. Through the chip removal design in two directions, the first chip removal surface 126 and the second chip removal surface 127, the chips are discharged from different directions, which can improve the chip removal efficiency.

[0083] Specifically, the first chip removal surface 126 forms an angle of 30° to 45° with the upper surface of the support 120. The distance between the first chip removal surface 126 and the upper surface of the support 120 gradually decreases from the outer periphery of the mounting body 130 towards one side of the support 120 to a minimum. The width of the first chip removal surface 126 gradually decreases from the outer periphery of the mounting body 130 towards one side of the support 120. The second chip removal surface 127 is flush with the first chip removal surface 126. The second chip removal surface 127 and the upper surface of the support 120 can be connected by a downward inclined plane. This inclined plane can guide the chips in the front-back direction of the support 120 or in the left-right direction of the support 120, thereby forming multiple trapezoidal chip removal blocks on both sides of the first chip removal surface 126, thus effectively improving the chip removal effect.

[0084] Example 8

[0085] This embodiment is an embodiment of a milling drum, including a drum, a cutter head 300, and a quick-change tool holder as described in any one of embodiments one to seven. The cutter head 300 is mounted on a gear sleeve 100, and the gear sleeve 100 is mounted on a tool holder 200 according to the mounting method in any one of embodiments one to seven. The tool holder 200 is mounted on the outer periphery of the drum.

[0086] Because the connection between the tool holder 200 and the gear sleeve 100 is simple and stable, and the load during operation is almost entirely borne by the wedge pin 400, the load distributed to the locking member 500 is negligible, the locking member 500 will not deform, and can effectively maintain the position of the wedge pin 400, thereby maintaining a reliable connection between the tool holder 200 and the gear sleeve 100; when it is necessary to remove the gear sleeve 100 and the tool holder 200 for maintenance, simply remove the locking member 500, remove the wedge pin 400, and pull the fixing handle 110 out of the first mounting hole 210, which is convenient and quick. Therefore, the milling drum of this embodiment has good working stability, long service life, and is easy to maintain.

[0087] In this embodiment, a plurality of cutter heads 300 and quick-change tool holders are spirally arranged on the outer periphery of the drum. This arrangement allows for easy disassembly when removing the gear sleeve 100, as the locking member 500 is located on the side and there is ample space for disassembly. The wedge-shaped pin 400 protruding from the second connecting hole 230 also provides ample space for disassembly. It should be noted that the arrangement of the quick-change tool holders and cutter heads 300 on the outer periphery of the drum is a preferred arrangement to simplify the maintenance of the milling drum and is not intended to limit the invention. Other arrangements that enable rolling milling of the cutter heads 300 are also applicable to this invention.

[0088] Example 9

[0089] This embodiment is an example of a milling machine, including a frame and a milling drum as described in Embodiment 8, the milling drum being mounted on the frame. Because the connection between the cutter holder 200 and the gear sleeve 100 is simple and stable; during operation, almost all the load is borne by the wedge pin 400, and the load distributed to the locking member 500 is negligible, the locking member 500 will not deform, effectively maintaining the position of the wedge pin 400 and thus maintaining a reliable connection between the cutter holder 200 and the gear sleeve 100; when it is necessary to remove the gear sleeve 100 and the cutter holder 200 for maintenance, simply remove the locking member 500, remove the wedge pin 400, and pull the fixing handle 110 out of the first mounting hole 210, which is convenient and quick. Therefore, the milling machine of this embodiment has good working stability, long service life, and is easy to maintain.

[0090] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0091] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A quick-change tool holder, comprising a detachably connected tool seat (200) and a tooth sleeve (100), the tooth sleeve (100) comprising a fixed shank (110), the tool seat (200) being provided with a first mounting hole (210) for plugging with the fixed shank (110); characterized in that, The fixed shank (110) is provided with a first pressing surface (111) on the outer periphery, the tool seat (200) is provided with a first connecting hole (220) and a second connecting hole (230) which are in communication with each other, and the second connecting hole (230) at least partially overlaps the first mounting hole (210); a locking member (500) is movably connected in the first connecting hole (220), the locking member (500) is provided with external threads, the first connecting hole (220) is provided with internal threads, the locking member (500) is screwed with the first connecting hole (220), and a wedge-shaped pin shaft (400) which can be in abutment with the locking member (500) is arranged in the second connecting hole (230), the wedge-shaped pin shaft (400) is provided with a second pressing surface (410) which can be in abutting contact with the first pressing surface (111), and the pressing force between the first pressing surface (111) and the second pressing surface (410) at least includes a first component along the axial direction of the fixed shank (110) and a second component along the radial direction of the fixed shank (110); The first pressing surface (111) is a first plane, the fixed shank (110) is further provided with a third plane (112) on the outer periphery, the first plane is connected with the third plane (112) to form a recessed position, when the first pressing surface (111) and the second pressing surface (410) are in abutting contact with each other, the third plane (112) is tangent to the outer peripheral surface of the wedge-shaped pin shaft (400), or the tangent plane of the third plane (112) is parallel to the outer peripheral surface of the wedge-shaped pin shaft (400). Further comprising a third connecting hole (240), the first connecting hole (220) and the third connecting hole (240) are respectively communicated at two ends of the second connecting hole (230), and the hole diameter of the second connecting hole (230) gradually decreases from the first connecting hole (220) to the third connecting hole (240).

2. The quick change tool holder of claim 1, wherein, The second pressing surface (410) is a second plane, the cross section of the wedge-shaped pin shaft (400) is an arc shape, and the central angle of the arc shape is greater than 180°.

3. The quick change tool holder of claim 1, wherein, The third connecting hole (240) is detachably connected with a plugging member (600).

4. Quick-change tool holder according to any one of claims 1 to 3, characterized in that A limiting assembly for preventing the fixed shank (110) from rotating is arranged between the side of the fixed shank (110) away from the first pressing surface (111) and the hole wall of the first mounting hole (210).

5. The quick change tool holder of claim 4, wherein, The limiting assembly comprises a limiting protrusion (211) arranged on the hole wall of the first mounting hole (210) and a limiting recess (113) arranged on the outer periphery of the fixed shank (110), or the limiting assembly comprises a limiting recess (113) arranged on the hole wall of the first mounting hole (210) and a limiting protrusion (211) arranged on the outer periphery of the fixed shank (110), the limiting protrusion (211) and the limiting recess (113) are matched with each other, or the limiting assembly comprises a first recess (114) arranged on the hole wall of the first mounting hole (210) and a second recess (212) arranged on the outer periphery of the fixed shank (110), the first recess (114) and the second recess (212) surround a limiting cavity, and a limiting member (700) is connected in the limiting cavity.

6. Quick-change tool holder according to any one of claims 1 to 3, characterized in that The tooth sleeve (100) further comprises a supporting body (120) and a mounting body (130), the mounting body (130), the supporting body (120) and the fixed shank (110) are sequentially arranged, the lower surface of the supporting body (120) comprises a first fitting surface and a second fitting surface (122), the upper surface of the cutter seat (200) comprises a third fitting surface and a fourth fitting surface (250), the first fitting surface is fitted with the third fitting surface, and the second fitting surface (122) is fitted with the fourth fitting surface (250).

7. The quick change tool holder of claim 6, wherein, The second fitting surface (122) and the fourth fitting surface (250) are both fourth planes, the fourth plane and the first pressing surface (111) are respectively located on both sides of the axis of the fixed shank (110), a first acute angle is arranged between the fourth plane and the axis of the fixed shank (110), a second acute angle is arranged between the first pressing surface (111) and the axis of the fixed shank (110), and the first acute angle is greater than the second acute angle.

8. The quick change tool holder of claim 6, wherein, The first fitting surface comprises two groups of first supporting surfaces (121) which are arranged in disconnection, the third fitting surface comprises two groups of third supporting surfaces (260) which are arranged in disconnection, and an included angle of 90°-180° is formed between the two groups of first supporting surfaces (121) and between the two groups of third supporting surfaces (260).

9. The quick change tool holder of claim 8, wherein, The two groups of first supporting surfaces (121) and the two groups of third supporting surfaces (260) are both curved surfaces.

10. The quick change tool holder of claim 6, wherein, A first recess (123) is arranged at the connection of the first fitting surface and the second fitting surface (122), a convex part (124) is formed at the transition connection of the first fitting surface and the first recess (123), a second recess (270) is arranged at the connection of the third fitting surface and the fourth fitting surface (250), and the convex part (124) and the second recess (270) are matched and limited in position.

11. The quick change tool holder of claim 6, wherein, The mounting body (130) is provided with a second mounting hole (131) for mounting a cutter head (300), the supporting body (120) is provided with an opening (125) which is arranged in communication with the second mounting hole (131), the axis of the opening (125) is perpendicular to the axis of the second mounting hole (131), and the width of the opening (125) is smaller than the hole diameter of the second mounting hole (131).

12. A milling drum, characterized by, A quick-change cutter holder comprises a roller, a cutter head (300) and the quick-change cutter holder according to any one of claims 1-11, the cutter head (300) is mounted on the tooth sleeve (100), the tooth sleeve (100) is mounted on the cutter seat (200), and the cutter seat (200) is mounted on the outer periphery of the roller.

13. A milling machine, characterized in that A milling drum according to claim 12 is arranged on the rack. A milling drum according to claim 12 is arranged on the rack.

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