Knife rest system for road surface operation machine

Abstract

The utility model discloses a tool rest system for a pavement operation machine, which belongs to the technical field of milling machine tool rests and comprises a tool rest body. The fixing handle is directly or indirectly connected to the tool rest body on the inserting sleeve opening side, the part, away from the inserting sleeve opening side, of the tool rest body is provided with a machining side of a tool containing part, the tool rest and the tool rest installation matching tool apron are arranged on the tool apron body located above a fixing handle installation hole, and an arc-shaped transition face is formed in the tool apron body and matched with a detaching face of the tool rest. And a limiting structure for limiting the tool rest to axially rotate along the fixed handle mounting hole is arranged on the tool rest body on one side of the arc-shaped transition surface. The utility model has the beneficial effects that the conical dismounting surface is combined with the limiting structure, so that the processing difficulty requirement is greatly reduced, the processing cost is reduced, and the maintenance and use cost is further reduced; particularly, the conical dismounting surface can assist in centering during assembly, so that the assembly and dismounting operation difficulty is reduced.

Description

Technical fields:

[0001] This utility model belongs to the field of milling machine tool holder technology, and more specifically relates to a tool holder system for road operation machines. Background technology:

[0002] Tool holder system: A working device for road operation machinery, such as milling cutters mounted on the milling drum of a road milling machine, which can be used for milling and resurfacing of road surfaces. It mainly consists of two parts: the tool holder and the tool support.

[0003] Milling machine: One of the main types of machinery for asphalt pavement maintenance and construction, and one of the main equipment for asphalt concrete pavement maintenance and construction. It is mainly used for excavation and renovation of asphalt concrete pavement in highways, urban roads, airports, freight yards, etc. It can also be used to clean up defects such as road surface bumps, oil waves, textures, and ruts. It can also be used to excavate road potholes and trenches, as well as roughen cement pavement and mill level surface misalignments.

[0004] With my country's economic development and enhanced comprehensive national strength, the trends of urbanization in towns and villages, the expansion of small and medium-sized cities, and the landscaping of large and medium-sized cities are becoming increasingly apparent. The highway transportation industry is developing rapidly, and the number of urban road reconstruction, expansion, and construction projects is also increasing, leading to a growing demand for road milling machines. However, this also results in more frequent replacements of milling cutters. Therefore, the mainstream solution in the industry is a milling cutter system. This system involves mounting the milling cutter on a tool holder via a snap ring structure. The cutter can rotate around the axis of the mounting hole within the tool holder but cannot move out along that axis. Furthermore, the tool holder and the tool seat mounted on the milling drum are fitted together through a designed assembly surface and assembled using clamping bolts. These clamping bolts engage with threaded holes on the tool seat, and after being tightened, they press firmly against the fixed shank end of the tool holder, thereby extending the service life of the milling cutter system.

[0005] However, a strong alternating load is introduced into the machining tool held in the tool holder and transmitted to the base. This alternating stress is applied to the mating surface between the tool holder and the base. Especially when milling very hard surfaces, the positional surface between the tool holder and the base may widen or deflect. Consequently, it is no longer guaranteed that the tool holder will be reliably held in the base.

[0006] National utility model patent with patent number 201610825926.3 discloses a tool holder that solves the above problems well. However, the mating surfaces of the tool holder and the tool seat in this structure are mostly inclined surfaces. Because the inclined surface forms a certain angle with the axis of the tool holder fixing handle, the force from the feedback of the milled road surface on the milling cutter is transmitted to the tool holder, as well as the rotational force on the tool holder. Part of the effect of these forces is converted into an outward force along the axial direction of the tool holder. This part of the force will force the tool holder to loosen and fall off. Utility Model Content:

[0007] To solve the above problems and overcome the shortcomings of the prior art, this utility model provides a tool holder system for road operation machinery;

[0008] The first technical problem to be solved is that the mating surfaces of the tool holder and the tool support are mostly inclined planes. Because the inclined planes are at a certain angle to the axis of the tool holder fixing shank, the force of feedback from the milled road surface on the milling cutter is transmitted to the tool holder, as well as the rotational force on the tool holder. Part of the effect of these forces is converted into an outward force along the axis of the tool holder, which will force the tool holder to loosen and fall off.

[0009] The specific technical solution of this utility model to solve the above-mentioned technical problems is as follows: the tool holder includes a tool holder body; a fixing handle is directly or indirectly connected to the tool holder body on the insertion sleeve side, and the machining side of the tool holder body away from the insertion sleeve side has a tool receiving portion.

[0010] The tool holder body is provided with a removal surface at the connection between it and the fixed handle. The removal surface is conical or spherical. The fixed handle is directly or indirectly connected to the conical or spherical removal surface.

[0011] Furthermore, the machining side includes at least one tool receiving opening with a longitudinal axis that is open toward the tool insertion side of the tool holder body on the tool receiving portion.

[0012] Furthermore, a preset number of contact surfaces are provided on the circular sidewall of the fixed handle, with the contact surfaces spaced apart from each other.

[0013] Furthermore, the contact surface is composed of a first contact surface and a second contact surface set at a preset angle.

[0014] Furthermore, a receiving portion for tightening bolts is provided on the circular sidewall of the fixing handle that abuts the cut surfaces, and the receiving portion is provided with a tightening surface.

[0015] A tool holder system for a road work machine includes a tool holder and a tool mount, characterized in that the tool mount includes a tool mount body having a support side facing a fixed shank and a mounting side connected to a milling drum;

[0016] The tool holder support side has a fixed shank mounting hole, which is matched with the fixed shank insertion.

[0017] An arc-shaped transition surface is provided on the tool holder body located above the fixed shank mounting hole, and the arc-shaped transition surface matches the tool holder's removal surface.

[0018] A limiting structure is provided on the tool holder body on one side of the arc transition surface to restrict the axial rotation of the tool holder along the mounting hole of the fixed shank.

[0019] Furthermore, the limiting structure is detachably and fixedly connected to the tool holder.

[0020] Furthermore, the limiting structure can be any one of a snap-fit ​​connection, a tenon-and-mortise connection, or a bolt connection.

[0021] The beneficial effects of this utility model are:

[0022] 1. The tool holder and tool support are installed and fitted through conical or spherical assembly and disassembly surfaces. Under normal working conditions, continuous automatic assembly pre-tightening can be achieved to ensure that the tool holder is always in a secure installation state.

[0023] 2. The tool holder and tool support are installed and fitted through conical or spherical assembly and disassembly surfaces, and the added limiting structure, compared with the traditional inclined assembly support surface, eliminates the component force along the axis of the tool holder fixed shank generated by the rotational force of the tool holder when the milling cutter is working, effectively preventing the tool holder from loosening.

[0024] 3. The combination of the conical removal surface and the limiting structure greatly reduces the difficulty of processing, reduces processing costs, and thus reduces maintenance and usage costs; in particular, the conical removal surface can assist in centering during assembly, reducing the difficulty of assembly and disassembly operations. Attached image description:

[0025] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Appendix Figure 2 This is a top view structural diagram of the tool holder of this utility model.

[0027] Appendix Figure 3 This is a bottom view structural schematic diagram of the tool holder of this utility model;

[0028] Appendix Figure 4 This is a schematic diagram of the tool holder structure of this utility model;

[0029] Appendix Figure 5 This is a cross-sectional structural diagram of an embodiment of the present invention; in the attached drawing:

[0030] 1. Tool holder body; 2. Fixing shank; 3. Machining side; 4. Removal surface; 5. Tool receiving opening; 6. Contact cutting surface; 7. First contact cutting surface; 8. Second contact cutting surface; 9. Tool receiving part; 10. Clamping surface; 11. Tool holder body; 12. Mounting side; 13. Fixing shank mounting hole; 14. Arc-shaped transition surface; 15. Limiting structure; I. Milling cutter; II. Tool holder; III. Sealing ring; V. Clamping bolt; VI. Bolt plug; IV. Tool holder; VII. Milling drum. Detailed implementation method:

[0031] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "left," "right," "rear," "lower left," "upper right," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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, they should not be construed as limiting the scope of protection of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] Specific embodiments of this utility model:

[0033] A tool holder system for road work machinery includes a tool holder IV and a tool post II;

[0034] The tool holder II includes a tool holder body 1; a fixing handle 2 is directly or indirectly connected to the tool holder body 1 on the insertion sleeve side, and the tool holder body 1 away from the insertion sleeve side has a machining side 3 with a tool receiving portion 9. The improvement of this utility model is as follows:

[0035] A removal surface 4 is provided at the connection between the tool holder body 1 and the fixed handle 2. The removal surface 4 is conical or spherical. The fixed handle 2 is directly or indirectly connected to the conical or spherical removal surface 4.

[0036] The machining side 3 includes at least one tool receiving opening 5 with a longitudinal axis that is open on the tool receiving part 9 facing the tool insertion side of the tool holder body 1, for mounting a milling tool;

[0037] The circular sidewall of the fixed handle 2 is also provided with a preset number of abutting surfaces 6. The abutting surfaces 6 are arranged at intervals. The abutting surfaces 6 are composed of a first abutting surface 7 and a second abutting surface 8 arranged at a preset angle. The function is to form a gap between the fixed handle 2 and the inner wall of the fixed handle mounting hole 13, so that the surface pressure generated is kept very small, and it is convenient to separate the fixed handle 2 from the fixed handle mounting hole 13.

[0038] The circular sidewall of the fixing handle 2 between the abutting cut surfaces 6 is also provided with a receiving part for tightening bolts, and the receiving part is provided with a tightening surface 10; the tightening bolt V acts on the receiving part provided with the tightening surface 10, and the assembly is tightened by the tightening bolt V.

[0039] in:

[0040] The tool holder II is mounted and matched with the tool holder IV. The improvement is that the tool holder IV includes a tool holder body 11, which has a support side facing the fixed handle 2 and a mounting side 12 connected to the milling drum.

[0041] The tool holder IV has a fixed shank mounting hole 13 on its support side, which is engaged with the fixed shank 2.

[0042] An arc-shaped transition surface 14 is provided on the tool holder body 11 located above the fixed shank mounting hole 13. The arc-shaped transition surface 14 cooperates with the removal surface 4 of the tool holder II.

[0043] A limiting structure 15 is provided on the tool holder body 1 on one side of the arc transition surface 14 to restrict the tool holder II from rotating axially along the fixed shank mounting hole 13, wherein the limiting structure 15 is detachably and fixedly connected to the tool holder II.

[0044] As a preferred embodiment of this utility model: the limiting structure 15 can be any one of a snap-fit ​​connection, a tenon-and-mortise connection, or a bolt connection;

[0045] Specifically: the limiting structure 15 can be a limiting block and a slot as shown in the attached figure; it can also be a pin or a pin hole, or a bolt;

[0046] The tool holder IV and the milling drum VII are generally connected by welding.

[0047] It should be noted that this utility model is a tool holder system for road construction machinery. In specific operation,

[0048] 1. The milling cutter I is installed in the cutter receiving opening 5 through its own snap ring device. The milling cutter I is a general model that can be obtained through conventional procurement channels, ensuring interchangeability.

[0049] Insert the fixing handle 2 of the tool holder II into the fixing handle mounting hole 13. The tool holder IV and the tool holder II are installed and fitted through the conical or spherical removal surface 4. Under normal working conditions, continuous automatic assembly pre-tightening can be achieved to ensure that the tool holder II is always in a secure installation state.

[0050] 2. A limiting structure 15 is provided on the tool holder body 1 on one side of the arc transition surface 14 to restrict the tool holder from rotating axially along the fixed shank mounting hole 13, wherein the limiting structure 15 is detachably and fixedly connected to the tool holder.

[0051] The tool holder IV and tool post II are installed and fitted through a conical or spherical removal surface 4, and the added limiting structure 15, compared with the traditional inclined surface mounting support surface, eliminates the component force along the axis of the tool post II fixed handle 2 generated by the rotational force when the milling cutter I is working, effectively preventing the tool post II from loosening.

[0052] The conical removal surface 4 greatly reduces the difficulty of processing, reduces processing costs, and thus reduces maintenance and usage costs; in particular, the conical removal surface 4 can assist in centering during assembly, reducing the difficulty of assembly and disassembly operations.

[0053] 3. The mounting seal ring of the fixing handle 2 of the tool holder II is installed on the tool holder IV and assembled by tightening bolt V; the tool holder IV is connected to the milling drum VII by welding; the disassembly end of the tightening bolt V is assembled with the tightening bolt plug VI to prevent the disassembly port from being blocked by mud.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tool holder comprising a tool holder body (1), a fixed shank (2) directly or indirectly connected to the tool holder body (1) at an insertion socket side, the tool holder body (1) having a machining side (3) with a tool receiving portion (9) away from the insertion socket side, characterized in that: a dismounting surface (4) is arranged at the connection between the tool holder body (1) and the fixed shank (2), the dismounting surface (4) being conical or spherical; the fixed shank (2) is directly or indirectly connected to the conical or spherical dismounting surface (4). At least one tool receiving opening (5) with a longitudinal axis is arranged in the tool receiving portion (9) of the machining side (3) and opens towards a tool insertion side of the tool holder body (1).

2. The knife holder of claim 1, wherein A predetermined number of abutting surfaces (6) are arranged on the circular side wall of the fixed shank (2) and are spaced apart from each other.

3. The knife holder of claim 1, wherein The abutting surfaces (6) are composed of a first abutting surface (7) and a second abutting surface (8) arranged at a predetermined angle.

4. The knife holder of claim 3, wherein A receiving portion for a clamping bolt is arranged on the circular side wall of the fixed shank (2) between the abutting surfaces (6), the receiving portion being provided with a clamping surface (10).

5. The knife holder of claim 3 wherein The tool seat (IV) comprises a tool seat body (11) having a support side towards the fixed shank (2) and a mounting side (12) connected to the milling drum; 6. A tool holder system for a road working machine, comprising a tool holder (II) according to any one of claims 1-5, the tool holder (II) being mounted in cooperation with a tool seat (IV), characterized in that A fixed shank mounting hole (13) is arranged on the support side of the tool seat (IV) and cooperates with the insertion of the fixed shank (2); An arc-shaped transition surface (14) is arranged on the tool seat body (11) above the fixed shank mounting hole (13) and cooperates with the dismounting surface (4) of the tool holder (II), A limiting structure (15) is arranged on the tool holder body (1) at one side of the arc-shaped transition surface (14) and limits the axial rotation of the tool holder (II) along the fixed shank mounting hole (13). The limiting structure (15) is detachably connected to the tool holder (II).

7. The blade system for a pavement-working machine of claim 6, characterized in that The limiting structure (15) is any one of a clamping connection, a mortise and tenon connection or a bolt connection.

8. The blade system for a pavement-working machine of claim 7, characterized in that ​

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