Hydraulic cutter handle device applied to machine tool

Abstract

The utility model relates to the technical field of machining equipment, in particular to a hydraulic cutter handle device applied to a machine tool, which comprises a cutter handle base provided with a cutter mounting hole, an annular oil cavity surrounding the cutter mounting hole, a pressure oil cavity communicated with the annular oil cavity and a piston arranged in the pressure oil cavity. An elastic transition sleeve is arranged in the cutter mounting hole, a cutter handle clamping hole is formed in the elastic transition sleeve in the axial direction, an annular spigot used for axial limiting is formed in one side of an opening of the cutter mounting hole in the circumferential direction, a limiting groove used for circumferential limiting is formed in the edge of the annular spigot, and an annular boss used for being matched with the annular spigot is arranged at one end of the elastic transition sleeve. The edge of the annular boss is provided with a limiting protrusion used for being matched with the limiting groove. The piston is arranged in the pressure oil cavity in a sliding mode and can slide in the pressure oil cavity along the axis. The hydraulic tool apron can solve the technical problems that an existing hydraulic tool apron cannot position a tool in the circumferential direction and is poor in universality.

Description

Technical Field

[0001] This utility model relates to the field of mechanical processing equipment technology, specifically a hydraulic tool holder device applied to machine tools. Background Technology

[0002] Existing hydraulic tool holders, such as the utility model patent with announcement number CN214290897U, can quickly lock the tool body through hydraulic expansion, but when the tool is installed in the expansion sleeve of the tool holder body, it cannot accurately position the circumferential position of the tool.

[0003] Therefore, when installing the cutting tool, it is necessary to further determine the circumferential position of the tool to ensure that the angle of the cutting tip is within the appropriate range. Furthermore, the height of the cutting tip changes as the tool rotates circumferentially, requiring a second tip alignment step after clamping the tool, making the operation rather cumbersome.

[0004] In addition, existing hydraulic tool holders use a structure in which the tool holder is directly connected to the tool holder, so they can only use tools that match the tool holder and tool holder, resulting in poor versatility. Summary of the Invention

[0005] The purpose of this invention is to provide a hydraulic tool holder device for machine tools. By setting an elastic transition sleeve, which can be circumferentially positioned in the tool mounting hole, the technical problem that existing hydraulic tool holders cannot circumferentially position the tool and have poor versatility can be solved.

[0006] To achieve the above objectives, the present invention adopts the following technical solution.

[0007] A hydraulic tool holder device for machine tools includes a tool holder base for positioning and connecting with the machine tool. The tool holder base has a cylindrical tool mounting hole, an annular oil chamber surrounding the tool mounting hole, a pressure oil chamber communicating with the annular oil chamber, and a piston disposed in the pressure oil chamber.

[0008] An elastic transition sleeve is provided inside the tool mounting hole. The outer wall of the elastic transition sleeve mates with the tool mounting hole. A tool holder clamping hole is provided axially inside the elastic transition sleeve for mates with the tool holder. An annular stop is provided circumferentially on one side of the tool mounting hole opening for axial positioning of the elastic transition sleeve. A limiting groove is provided on the edge of the annular stop for circumferential positioning of the elastic transition sleeve. An annular boss is provided at one end of the elastic transition sleeve for mates with the annular stop. A limiting protrusion is provided on the edge of the annular boss for mates with the limiting groove.

[0009] The piston slides within the pressure oil chamber and can slide along its axis within the chamber, used to change the pressure of the hydraulic oil in the annular oil chamber to load and unload the cutting tool.

[0010] Furthermore, the tool holder base is provided with a positioning block for cooperating with the machine tool.

[0011] Furthermore, the elastic transition sleeve is provided with expansion joints to enhance its elastic deformation capacity. The length direction of the expansion joints is parallel to the axial direction of the elastic transition sleeve, and they are evenly distributed circumferentially on the elastic transition sleeve.

[0012] Furthermore, the expansion joint runs through the inner and outer walls along the diameter of the elastic transition sleeve, and the expansion joint is open at one end along the axial direction of the elastic transition sleeve, with adjacent expansion joints having opposite opening directions.

[0013] Furthermore, the annular oil cavity has an annular groove along the circumferential direction on the side near the tool mounting hole. Multiple annular grooves are evenly distributed along the axial direction of the annular oil cavity, so that when the hydraulic oil pressure is increased, the annular oil cavity can apply uniform pressure to the inner wall of the tool mounting hole to clamp the tool.

[0014] Furthermore, an annular groove is provided on the inner wall of the tool mounting hole along the circumferential direction. Multiple annular grooves are evenly provided along the axial direction of the tool mounting hole, so that when the pressure in the annular oil cavity increases, the tool mounting hole can apply uniform pressure to the elastic transition sleeve to clamp the tool.

[0015] Furthermore, the piston is provided with a threaded part, and the tool holder base is provided with a threaded hole that mates with the threaded part. Rotating the piston can cause the piston to move axially within the pressure oil chamber under the action of the threaded pair.

[0016] Furthermore, the threaded part is provided with an internal hexagonal hole, which is used to rotate with a hexagonal wrench to move the piston.

[0017] By adopting the above technical solution, this utility model has the following beneficial effects:

[0018] 1. This utility model achieves circumferential positioning of the tool in the tool mounting hole by setting a limiting groove on the edge of the annular stop of the tool mounting hole and setting a limiting protrusion on the edge of the annular boss of the elastic transition sleeve that cooperates with the limiting groove. Only by designing a matching elastic transition sleeve according to the parameters of the tool can the tool be quickly and accurately clamped on the hydraulic tool holder, thus improving production efficiency.

[0019] 2. This utility model features an elastic transition sleeve, which allows the cutting tool to be fitted into the tool mounting hole. Cutting tools of different specifications can be used on this hydraulic tool holder simply by matching the elastic transition sleeve, greatly improving versatility. Attached Figure Description

[0020] Figure 1 This is a cross-sectional structural diagram of the present invention (the tool holder base is shown in cross-section).

[0021] Figure 2 This is a three-dimensional structural diagram of the present invention (the knife handle base is shown in cross-section).

[0022] Figure 3 This is an exploded structural diagram of the present invention (the base of the knife handle is shown in cross-section).

[0023] Figure 4 yes Figure 3 Enlarged diagram of point A in the middle.

[0024] Figure 5 This is a schematic diagram of the exploded structure from another angle of this utility model.

[0025] Figure descriptions: 1. Tool holder base; 11. Tool mounting hole; 111. Annular stop; 112. Limiting groove; 113. Annular groove; 12. Annular oil cavity; 121. Annular groove; 13. Pressure oil cavity; 14. Positioning block; 15. Connecting oil passage; 2. Piston; 21. Threaded part; 211. Internal hexagonal hole; 22. Sealing ring; 3. Elastic transition sleeve; 31. Tool holder clamping hole; 32. Annular boss; 33. Limiting protrusion; 34. Expansion joint. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the features and performance of a hydraulic tool holder device applied to machine tools according to this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] Please see the appendix Figures 1-5 A hydraulic tool holder device for machine tools includes a tool holder base 1 for positioning and connecting with the machine tool. The tool holder base 1 has a cylindrical tool mounting hole 11, an annular oil chamber 12 surrounding the tool mounting hole 11, a pressure oil chamber 13 communicating with the annular oil chamber 12, and a piston 2 disposed in the pressure oil chamber 13.

[0028] The tool holder base 1 is provided with a positioning block 14 for cooperating with a machine tool. The positioning block 14 is located at the bottom of the tool holder base 1, and the length direction of the positioning block 14 is parallel to the axial direction of the tool mounting hole 11, for quick positioning and installation on the machine tool.

[0029] An elastic transition sleeve 3 is provided inside the tool mounting hole 11. The outer wall of the elastic transition sleeve 3 mates with the tool mounting hole 11. A tool holder clamping hole 31 for mates with a tool holder is provided axially inside the elastic transition sleeve 3. The tool holder clamping hole 31 is typically a polygonal prism shape to prevent the tool holder from rotating circumferentially within it. Preferably, the tool holder used in this embodiment is a regular square prism, and correspondingly, the tool mounting hole 11 is also a regular square prism.

[0030] The tool mounting hole 11 has an annular stop 111 along its circumferential direction on one side for axial positioning of the elastic transition sleeve 3. The edge of the annular stop 111 has a limiting groove 112 for circumferential positioning of the elastic transition sleeve 3. One end of the elastic transition sleeve 3 has an annular boss 32 for engaging with the annular stop 111, and the edge of the annular boss 32 has a limiting protrusion 33 for engaging with the limiting groove 112. By customizing matching elastic transition sleeves 3 for different tool specifications and controlling the circumferential position of the limiting protrusion 33 relative to the tool mounting hole 11, the tool can be precisely positioned circumferentially, and the operation is simple.

[0031] The elastic transition sleeve 3 is provided with expansion joints 34 to enhance its elastic deformation capability. The length direction of the expansion joints 34 is parallel to the axial direction of the elastic transition sleeve 3, and they are evenly distributed circumferentially on the elastic transition sleeve 3. The expansion joints 34 pass through the inner and outer walls along the diameter of the elastic transition sleeve 3. The expansion joints 34 are open at one end along the axial direction of the elastic transition sleeve 3, and the opening directions of adjacent expansion joints 34 are opposite.

[0032] The annular oil cavity 12 has an annular groove 121 along the circumferential direction on the side near the tool mounting hole 11. The annular groove 121 is evenly provided in multiple places along the axial direction of the annular oil cavity 12, so that when the hydraulic oil pressure is increased, the annular oil cavity 12 can apply uniform pressure to the inner wall of the tool mounting hole 11 to clamp the tool.

[0033] The inner wall of the tool mounting hole 11 is provided with an annular groove 113 along the circumferential direction. Multiple annular grooves 113 are evenly provided along the axial direction of the tool mounting hole 11. When the pressure in the annular oil cavity 12 increases, the tool mounting hole 11 can apply uniform pressure to the elastic transition sleeve 3 to clamp the tool.

[0034] The piston 2 is slidably disposed in the pressure oil chamber 13 and can slide along the axis in the pressure oil chamber 13 to change the pressure of the hydraulic oil in the annular oil chamber 12 to realize the loading and unloading of the tool.

[0035] The piston 2 is provided with a threaded part 21, and the tool holder base 1 is provided with a threaded hole that mates with the threaded part 21. Rotating the piston 2 can cause the piston 2 to move axially within the pressure oil chamber 13 under the action of the threaded pair.

[0036] The threaded part 21 is provided with an internal hexagonal hole 211, which is used to rotate with a hexagonal wrench to move the piston 2.

[0037] In practice, the tool holder base 1 is fixedly installed on the tool holder of the machine tool. The positioning block 14 at the bottom of the tool holder base 1 can quickly position the axis direction of the tool, thereby achieving fast and accurate installation.

[0038] Use a hex wrench to rotate piston 2 to relieve the pressure of hydraulic oil in annular oil chamber 12.

[0039] The elastic transition sleeve 3, which matches the tool to be used, is then inserted into the tool mounting hole 11, and the annular boss 32 and the limiting protrusion 33 of the elastic transition sleeve 3 are respectively engaged with the annular stop 111 and the limiting groove 112 of the tool mounting hole 11.

[0040] Then insert the tool holder into the tool holder clamping hole 31 of the elastic sleeve 3. When installing, pay attention to the circumferential angle of the tool to ensure that the tool tip is at the correct angle.

[0041] Finally, piston 2 is rotated in the opposite direction, compressing the hydraulic oil and increasing the pressure of the hydraulic oil in the annular oil chamber 12. The inner wall of the tool mounting hole 11 undergoes slight deformation under pressure, squeezing the elastic oversleeve 3 to clamp the tool holder, thus achieving tool mounting.

[0042] It should be noted that the parts not described in detail in this solution are all prior art. The above embodiments are only used to illustrate the present utility model, but the present utility model is not limited to the above embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A hydraulic tool holder device for machine tools, comprising a tool holder base (1) for positioning and connecting with the machine tool, characterized in that: The tool holder base (1) is provided with a cylindrical tool mounting hole (11), an annular oil chamber (12) surrounding the tool mounting hole (11), a pressure oil chamber (13) communicating with the annular oil chamber (12), and a piston (2) provided in the pressure oil chamber (13). An elastic transition sleeve (3) is provided inside the tool mounting hole (11). The outer wall of the elastic transition sleeve (3) is fitted with the tool mounting hole (11). The elastic transition sleeve (3) is provided with a tool holder clamping hole (31) for fitting with the tool holder along the axial direction. An annular stop (111) for axial positioning of the elastic transition sleeve (3) is provided on one side of the opening of the tool mounting hole (11). A positioning groove (112) for circumferential positioning of the elastic transition sleeve (3) is provided on the edge of the annular stop (111). An annular boss (32) for fitting with the annular stop (111) is provided at one end of the elastic transition sleeve (3). A positioning protrusion (33) for fitting with the positioning groove (112) is provided on the edge of the annular boss (32). The piston (2) is slidably located in the pressure oil chamber (13) and can slide along the axis in the pressure oil chamber (13) to change the pressure of the hydraulic oil in the annular oil chamber (12) to realize the loading and unloading of the tool.

2. The hydraulic tool holder device for machine tools as described in claim 1, characterized in that: The tool holder base (1) is provided with a positioning block (14) for cooperating with the machine tool.

3. The hydraulic tool holder device for machine tools as described in claim 1, characterized in that: The elastic transition sleeve (3) is provided with expansion joints (34) to enhance the elastic deformation capacity. The length direction of the expansion joints (34) is parallel to the axial direction of the elastic transition sleeve (3) and they are evenly distributed along the circumference on the elastic transition sleeve (3).

4. The hydraulic tool holder device for machine tools as described in claim 3, characterized in that: The expansion joint (34) runs through the inner and outer walls along the diameter of the elastic transition sleeve (3). The expansion joint (34) is open at one end along the axial direction of the elastic transition sleeve (3), and the opening directions of adjacent expansion joints (34) are opposite.

5. A hydraulic tool holder device for machine tools as described in claim 1, characterized in that: The annular oil cavity (12) has an annular groove (121) along the circumferential direction on the side near the tool mounting hole (11). The annular groove (121) is evenly provided in multiple places along the axial direction of the annular oil cavity (12), so that when the hydraulic oil pressure is increased, the annular oil cavity (12) can apply uniform pressure to the inner wall of the tool mounting hole (11) to clamp the tool.

6. A hydraulic tool holder device for machine tools as described in claim 5, characterized in that: The inner wall of the tool mounting hole (11) is provided with an annular groove (113) along the circumferential direction. The annular groove (113) is provided in multiple places along the axial direction of the tool mounting hole (11) so that when the pressure in the annular oil cavity (12) increases, the tool mounting hole (11) can apply uniform pressure to the elastic transition sleeve (3) to clamp the tool.

7. A hydraulic tool holder device for machine tools as described in claim 1, characterized in that: The piston (2) is provided with a threaded part (21), and the tool holder base (1) is provided with a threaded hole that mates with the threaded part (21). Rotating the piston (2) can cause the piston (2) to move axially in the pressure oil chamber (13) under the action of the threaded pair.

8. A hydraulic tool holder device for machine tools as described in claim 7, characterized in that: The threaded part (21) is provided with an internal hexagonal hole (211) for use with a hexagonal wrench to rotate and move the piston (2).

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