Broach structure

Abstract

The present invention provides a broach structure, which includes a shaft core, a tool pull rod assembly and a pull claw. The shaft core is rotatably arranged around its central axis; the tool is inserted into the second end of the shaft core; the axial direction of the pull rod assembly is parallel to the axial direction of the shaft core, and the pull rod assembly is movably inserted into the shaft core along its axial direction from the first end of the shaft core. The pull claw is connected to the end of the pull rod assembly close to the tool; when the pull rod assembly drives the pull claw to move, the pull claw opens or closes. The pull rod assembly has an air flow channel and a plurality of air outlet holes. The air flow channel is extended along the axial direction of the pull rod assembly, and the two ends of the air flow channel extend to the two end faces of the pull rod assembly respectively; the extension direction of each air outlet hole is set at an acute angle to the axial direction of the pull rod assembly, the first end of each air outlet hole is connected to the air flow channel, and the second end of each air outlet hole extends to the second end face of the pull rod assembly. The broach structure of the present application solves the problem that the broach structure in the prior art has a poor cleaning effect on the tapered hole of the shaft core.

Description

Technical Field

[0001] The present invention relates to the technical field of electric spindles, and in particular to a broach structure. Background Art

[0002] The process of loosening and broaching the tool in a high-speed electric spindle mainly depends on the broach structure. The existing broach structure has a draw rod passing through the inside of the shaft core, a disc spring or a coil spring is set on the draw rod, and a step surface is set on the inner surface of the shaft core and a shoulder is set on the draw rod. The number and size of the elastic components are determined according to the axial distance between the step surface and the shoulder, and then the size of the broaching force is determined. This places high requirements on the processing of the shaft core and the draw rod, and the broaching force is difficult to control.

[0003] Furthermore, the air flow channel structure of the existing broach structure has the problem of poor cleaning effect when air flow is introduced to clean the tapered hole of the shaft core. Summary of the Invention

[0004] The main purpose of the present invention is to provide a broach structure to solve the problem that the broach structure in the prior art has a poor cleaning effect on the tapered hole of the shaft core.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a broach structure, which includes: an axis core, which is rotatably arranged around its central axis; a tool, which is inserted into the second end of the axis core; a pull rod assembly, the axial direction of the pull rod assembly is parallel to the axial direction of the axis core, and the pull rod assembly is movably inserted into the axis core from the first end of the axis core along its axial direction; a pull claw, which is connected to the end of the pull rod assembly close to the tool, so that when the pull rod assembly drives the pull claw to move, the pull claw opens or closes, thereby loosening or clamping the tool; wherein, the pull rod assembly has an air flow channel and a plurality of air outlet holes, the air flow channel is extended along the axial direction of the pull rod assembly, and the two ends of the air flow channel extend to the two end surfaces of the pull rod assembly respectively; the extension direction of each air outlet hole is set at an acute angle to the axial direction of the pull rod assembly, the first end of each air outlet hole is connected to the air flow channel, and the second end of each air outlet hole extends to the second end surface of the pull rod assembly.

[0006] Furthermore, the pull rod assembly includes: a pull rod part, the axial direction of the pull rod part is the same as the axial direction of the pull rod assembly, the pull rod part has a first central channel, and the two ends of the first central channel respectively extend to the two ends of the pull rod part; the first central channel includes a first channel section and a second channel section, the inner wall surface of the first channel section is located on the side of the inner wall surface of the second channel section close to the central axis of the pull rod part, and the second channel section is located on the side of the first channel section close to the tool; the pulling claw is connected to one end of the pull rod part close to the tool; a joint rod, the axial direction of the joint rod is the same as the axial direction of the pull rod assembly, and the joint rod is arranged in the second channel section; the joint rod has a second central channel, and the two ends of the second central channel respectively extend to the two ends of the joint rod; a second elastic member, the second elastic member is arranged in the second channel section, the telescopic direction of the second elastic member is the same as the axial direction of the pull rod assembly, the first end of the second elastic member abuts against the step surface formed by the first channel section and the second channel section, and the second end of the second elastic member abuts against the joint rod; wherein, the first channel section, part of the channel section of the second channel section and the second central channel form an airflow channel; multiple air outlets are all arranged on the joint rod.

[0007] Furthermore, the pull rod component includes: a pull rod, the axial direction of the pull rod is the same as the axial direction of the pull rod component, the pull rod is provided with a fourth center channel extending along its axial direction, the two ends of the fourth center channel respectively extend to the two end surfaces of the pull rod, the fourth center channel includes a fourth channel section and a fifth channel section which are interconnected along its axial direction, the inner wall surface of the fifth channel section is located on the side of the inner wall surface of the fourth channel section away from the center axis of the fourth center channel; a pull rod joint part, the axial direction of the pull rod joint part is the same as the axial direction of the pull rod component, the pull rod joint part is provided with a third center channel extending along its axial direction, the two ends of the third center channel respectively extend to the two end surfaces of the pull rod joint part; the third center channel includes a sixth channel section and a seventh channel section which are interconnected along its axial direction, the inner wall surface of the sixth channel section is located on the side of the inner wall surface of the seventh channel section away from the center axis of the third center channel; the pull rod joint part is sleeved on the outside of the second end of the pull rod through the sixth channel section, so that the fifth channel section and the seventh channel section are connected and together form the second channel section, and the fourth channel section forms the first channel section; the pull claw is connected to the end of the pull rod joint part close to the tool.

[0008] Furthermore, a first protrusion is provided on the inner wall surface of the second channel section, and a second protrusion is provided on the outer wall of the connecting rod. The second protrusion is located on the side of the first protrusion away from the tool, and the second protrusion is used to abut against the first protrusion.

[0009] Furthermore, a fourth protrusion is protruding from the outer wall of the pull rod assembly, and the pull claw is located on a side of the fourth protrusion close to the tool. The pull claw abuts against the fourth protrusion and is clamped on the pull rod assembly.

[0010] Furthermore, the broach structure also includes: a rod sleeve, which is sleeved on the outside of the rod assembly and is adjustably arranged along the axial position of the rod assembly; a sleeve component, which is sleeved on the outside of the second end of the rod assembly and is fixedly arranged relative to the shaft core; the sleeve component and the rod sleeve are spaced apart along a direction parallel to or the same as the axial direction of the shaft core, and the sleeve component is located on the side of the rod sleeve close to the tool; the pulling claw is located on the inner side of the sleeve component; the first elastic component is located between the rod sleeve and the sleeve component and is telescopically arranged along a direction parallel to or the same as the axial direction of the shaft core.

[0011] Furthermore, the pull rod sleeve and the pull rod assembly are threadedly connected.

[0012] Furthermore, the broach structure also includes a ball sleeve, which is arranged on the outside of the pull rod assembly, one end of the ball sleeve abuts against the first elastic member, and the other end of the ball sleeve abuts against the sleeve component.

[0013] Furthermore, a third protrusion is protruding from the inner wall surface of the sleeve component, and the pull rod assembly includes a pull rod and a pull rod joint portion, and the axial direction of the pull rod and the axial direction of the pull rod joint portion are both the same as the axial direction of the pull rod assembly; the pull rod joint portion is sleeved on the outside of the second end of the pull rod, and the pull rod joint portion is located on the side of the third protrusion close to the tool and abuts against the third protrusion.

[0014] Furthermore, a notch is provided on the outer wall surface of the pull rod assembly, and a mounting hole is provided on the inner wall surface of the pull rod sleeve. The mounting hole passes through the inner wall surface of the pull rod sleeve to the outer wall surface of the pull rod sleeve. The fastener is passed through the mounting hole and the notch to ensure relative fixation between the pull rod assembly and the pull rod sleeve.

[0015] According to the technical solution of the present invention, the broach structure includes a shaft core, a tool, a pull rod assembly and a pull claw. The shaft core is rotatably arranged around its central axis; the tool is inserted into the second end of the shaft core; the axial direction of the pull rod assembly is parallel to the axial direction of the shaft core, and the pull rod assembly is movably inserted into the shaft core from the first end of the shaft core along its axial direction. The pull claw is connected to the end of the pull rod assembly close to the tool so that the pull rod assembly drives the pull claw to move axially; when the pull rod assembly drives the pull claw to move, the pull claw opens or closes, thereby causing the pull claw to release the tool or clamp the tool. The pull rod assembly has an airflow channel and a plurality of air outlets. The airflow channel is extended along the axial direction of the pull rod assembly, and the two ends of the airflow channel extend to the two end faces of the pull rod assembly respectively; the extension direction of each air outlet is set at an acute angle to the axial direction of the pull rod assembly, the first end of each air outlet is connected to the airflow channel, and the second end of each air outlet extends to the second end face of the pull rod assembly.

[0016] During the specific implementation process, when the pull claw clamps the tool to be in the broaching state, the pull claw plays a role in fixing the tool, so that the tool and the shaft core are relatively fixed, and then the tool rotates with the shaft core so that the tool can perform processing operations. When the pull claw is opened, the tool can be removed from the pull claw and detached from the shaft core. At this time, air is introduced into the air flow channel from the first end of the air flow channel. After passing through the air flow channel, the air flow is ejected from the second end of the air flow channel and multiple air outlets. Since the extension direction of each air outlet is set at an acute angle to the axial direction of the pull rod assembly, the air flow ejected from the second end of the air flow channel and the multiple air outlets can better clean the through-hole of the shaft core for the tool to pass through, so as to achieve a good cleaning effect on the through-hole of the shaft core; and the through-hole of the shaft core is usually a tapered hole, so the broaching structure of the present application solves the problem that the broaching structure in the prior art has a poor cleaning effect on the tapered hole of the shaft core. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It shows a longitudinal cross-sectional structural diagram of the broach structure according to the present invention;

[0019] Figure 2 A schematic diagram of the assembly structure of the drawbar, drawbar sleeve, first elastic member, and sleeve member of the broach structure according to the present invention is shown;

[0020] Figure 3 A longitudinal sectional structural diagram of a drawbar assembly of a broach structure according to the present invention is shown (the first elastic member is not shown);

[0021] Figure 4 A longitudinal sectional structural diagram of a drawbar component of a broach structure according to the present invention is shown;

[0022] Figure 5 A longitudinal sectional structural diagram of a drawbar of a broach structure according to the present invention is shown;

[0023] Figure 6 A schematic diagram showing the external structure of a drawbar of a broach structure according to the present invention is shown;

[0024] Figure 7 A longitudinal sectional structural diagram of a drawbar joint portion of a broach structure according to the present invention is shown;

[0025] Figure 8 A schematic diagram showing the external structure of the drawbar joint portion of the broach structure according to the present invention is shown;

[0026] Figure 9A longitudinal sectional structural diagram of a joint rod of a broach structure according to the present invention is shown;

[0027] Figure 10 A schematic diagram showing the external structure of the joint rod of the broach structure according to the present invention is shown;

[0028] Figure 11 A longitudinal sectional structural diagram of a drawbar sleeve of a broach structure according to the present invention is shown;

[0029] Figure 12 A schematic structural diagram showing the pulling claws of the broach structure according to the present invention are in an open state.

[0030] The above drawings include the following reference numerals:

[0031] 1. Tie rod assembly; 101. Tie rod component; 1011. First central channel; 1012. First channel section; 1013. Second channel section; 103. Air flow channel; 11. Tie rod; 111. Fourth central channel; 1111. Fourth channel section; 1112. Fifth channel section; 112. Notch; 12. Connector rod; 121. Second protrusion; 122. Second central channel; 123. Air outlet; 13. Tie rod connector; 131. Third central channel; 1311. Sixth channel section; 1312. Seventh channel section; 132. First protrusion; 133. Fourth protrusion; 134. Annular groove; 135. Sealing ring; 15. Second elastic member;

[0032] 20. First elastic member; 21. Ball bearing sleeve; 30. Rod sleeve; 31. Mounting hole; 50. Sleeve component; 51. Sleeve portion; 52. Joint sleeve; 521. Third protrusion; 522. Sixth protrusion; 60. Pull claw; 61. Claw body;

[0033] 200, shaft core; 201, fifth protrusion; 300, tool; 310, Latin; 320, handle. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] The present invention provides a broach structure, please refer to Figures 1 to 12 The broaching tool structure includes a shaft core 200, a tool 300, a drawbar assembly 1, and a claw 60. The shaft core 200 is rotatably arranged around its central axis; the tool 300 is inserted through the second end of the shaft core 200; the axial direction of the drawbar assembly 1 is parallel to the axial direction of the shaft core 200, and the drawbar assembly 1 is movably inserted into the shaft core 200 from the first end of the shaft core 200 along its axial direction. The claw 60 is connected to the end of the drawbar assembly 1 near the tool 300, so that the drawbar assembly 1 drives the claw 60 to move axially; when the drawbar assembly 1 drives the claw 60 to move axially, the claw 60 opens or closes, thereby causing the claw 60 to release the tool 300 or clamp the tool 300. Among them, the tie rod assembly 1 has an air flow channel 103 and multiple air outlet holes 123. The air flow channel 103 is extended along the axial direction of the tie rod assembly 1, and the two ends of the air flow channel 103 extend to the two end surfaces of the tie rod assembly 1 respectively; the extension direction of each air outlet hole 123 is set at an acute angle to the axial direction of the tie rod assembly 1, the first end of each air outlet hole 123 is connected to the air flow channel 103, and the second end of each air outlet hole 123 extends to the second end surface of the tie rod assembly 1.

[0038] During the specific implementation process, when the pulling claw 60 clamps the tool 300 to be in the pulling state, the pulling claw 60 fixes the tool 300 so that the tool 300 and the shaft core 200 are relatively fixed, and then the tool 300 rotates with the shaft core 200 so that the tool 300 can perform processing operations. When the pulling claw 60 is opened, the tool 300 can be moved out of the pulling claw 60 and detached from the shaft core 200. At this time, air is introduced into the air flow channel 103 from the first end of the air flow channel 103. After passing through the air flow channel 103, the air flow is ejected from the second end of the air flow channel 103 and the multiple air outlet holes 123. Since the extension direction of each air outlet hole 123 is set at an acute angle to the axial direction of the pull rod assembly 1, the air flow ejected from the second end of the air flow channel 103 and the multiple air outlet holes 123 can better clean the penetration hole of the shaft core 200 for the tool 300 to penetrate, so as to have a good cleaning effect on the penetration hole of the shaft core 200; and the penetration hole of the shaft core 200 is usually a conical hole, so the broaching tool structure of the present application solves the problem that the broaching tool structure in the prior art has a poor cleaning effect on the conical hole of the shaft core.

[0039] It should be noted that, along the axial direction of the shaft core 200, the shaft core 200 has a first end and a second end that are oppositely disposed; along the extension direction of the airflow channel 103, the airflow channel 103 has a first end and a second end that are oppositely disposed; and the orientation from the first end to the second end of the shaft core 200 is the same as the orientation from the first end to the second end of the airflow channel 103. Along the axial direction of the tie rod assembly 1, the tie rod assembly 1 has a first end and a second end that are oppositely disposed. The two end faces of the tie rod assembly 1 mentioned above refer to the first end face and the second end face of the tie rod assembly 1. The orientation from the first end to the second end of the shaft core 200 is the same as the orientation from the first end to the second end of the tie rod assembly 1. Along the extension direction of each air outlet 123, each air outlet 123 has a first end and a second end that are oppositely disposed.

[0040] Specifically, the shaft core 200 is a hollow shaft, and the pull rod assembly 1 is inserted into the hollow channel of the shaft core 200 .

[0041] In this embodiment, the pull rod assembly 1 includes a pull rod part 101, a connecting rod 12 and a second elastic part 15. The axial direction of the pull rod part 101 is the same as the axial direction of the pull rod assembly 1. The pull rod part 101 has a first central channel 1011, and the two ends of the first central channel 1011 extend to the two end surfaces of the pull rod part 101 respectively; the first central channel 1011 includes a first channel section 1012 and a second channel section 1013 that are connected in sequence along its extension direction. Along the direction perpendicular to the axial direction of the pull rod part 101, the inner wall surface of the first channel section 1012 is located on the side of the inner wall surface of the second channel section 1013 close to the central axis of the pull rod part 101, so as to form a step structure on the inner wall surface of the first central channel 1011; the second channel section 1013 is located on the side of the first channel section 1012 close to the tool 300; the pull claw 60 is connected to the end of the pull rod part 101 close to the tool 300. The axial direction of the joint rod 12 is the same as the axial direction of the pull rod assembly 1. The joint rod 12 is disposed within the second channel section 1013. The joint rod 12 has a second central channel 122, with both ends of the second central channel 122 extending to the end surfaces of the joint rod 12. A second elastic member 15 is disposed within the second channel section 1013. The expansion and contraction direction of the second elastic member 15 is the same as the axial direction of the pull rod assembly 1. The second elastic member 15 has a first end and a second end that are oppositely disposed along the expansion and contraction direction. The first end of the second elastic member 15 abuts against the stepped surface formed by the first channel section 1012 and the second channel section 1013, and the second end of the second elastic member 15 abuts against the joint rod 12. Among them, the first channel section 1012, part of the channel section of the second channel section 1013 and the second central channel 122 form an airflow channel 103; multiple air outlet holes 123 are arranged on the joint rod 12, and the first end of each air outlet hole 123 is connected to the second central channel 122; the end of the pull rod component 101 away from the tool 300 is the first end of the pull rod assembly 1, and the end of the joint rod 12 close to the tool 300 is the second end of the pull rod assembly 1.

[0042] During the specific implementation process, when the pull rod assembly 1 drives the pull claw 60 to move in the direction from the first end to the second end of the pull rod assembly 1, after the connecting rod 12 abuts against the tool 300 and when the pull rod assembly 1 continues to drive the pull claw 60 to move in the direction from the first end to the second end of the pull rod assembly 1, the second elastic member 15 is contracted to make way for the connecting rod 12, so that the remaining components of the pull rod assembly 1 except the connecting rod 12 can continue to move in the direction from the first end to the second end of the pull rod assembly 1.

[0043] Specifically, the second elastic member 15 is a spring.

[0044] Specifically, the pull rod component 101 includes a pull rod 11 and a pull rod joint portion 13. The axial direction of the pull rod 11 is the same as the axial direction of the pull rod component 101. The pull rod 11 is provided with a fourth center channel 111 extending along its axial direction. The two ends of the fourth center channel 111 respectively extend to the two end surfaces of the pull rod 11. The fourth center channel 111 includes a fourth channel section 1111 and a fifth channel section 1112 interconnected along its axial direction. In a direction perpendicular to the axial direction of the pull rod 11, the inner wall surface of the fifth channel section 1112 is located on the side of the inner wall surface of the fourth channel section 1111 away from the central axis of the fourth center channel 111 to form a step structure on the inner wall surface of the fourth center channel 111; the axial direction of the pull rod joint portion 13 is the same as the axial direction of the pull rod component 101, and the pull rod joint portion 13 is provided with a third center channel 13 extending along its axial direction. 1. Both ends of the third center channel 131 extend to the two end surfaces of the pull rod joint part 13 respectively; the third center channel 131 includes a sixth channel section 1311 and a seventh channel section 1312 which are interconnected along its axial direction, and along the direction perpendicular to the axial direction of the pull rod joint part 13, the inner wall surface of the sixth channel section 1311 is located on the side of the inner wall surface of the seventh channel section 1312 away from the central axis of the third center channel 131; the pull rod 11 has a first end and a second end which are relatively arranged along its axial direction, and the second end of the pull rod 11 is located on the side of its first end close to the tool 300; the pull rod joint part 13 is sleeved on the outside of the second end of the pull rod 11 through the sixth channel section 1311, so that the fifth channel section 1112 and the seventh channel section 1312 are connected and jointly form the second channel section 1013, and the fourth channel section 1111 forms the first channel section 1012. The first end of the pull rod 11 is the first end of the pull rod assembly 1; the pull claw 60 is connected to the end of the pull rod joint 13 close to the tool 300; the first end of the second elastic member 15 abuts the step surface formed by the fourth channel section 1111 and the fifth channel section 1112.

[0045] In this embodiment, a first protrusion 132 is provided on the inner wall surface of the second channel section 1013, and a second protrusion 121 is provided on the outer wall of the connecting rod 12. The second protrusion 121 is located on the side of the first protrusion 132 away from the tool 300. The second protrusion 121 is used to abut against the first protrusion 132, so as to perform a certain axial limitation on the pull rod component 101 through the abutment cooperation between the first protrusion 132 and the second protrusion 121.

[0046] Specifically, along a direction perpendicular to the axial direction of the rod component 101, the inner wall surface of the seventh channel segment 1312 is located on the side of the inner wall surface of the fifth channel segment 1112 close to the central axis of the rod component 101, so that the part of the body at the seventh channel segment 1312 that protrudes toward the central axis of the rod component 101 relative to the inner wall surface of the fifth channel segment 1112 forms a first protrusion 132.

[0047] Specifically, the first protrusion 132 and the second protrusion 121 are both annular structures.

[0048] Specifically, the central axis of the first center channel 1011 coincides with the central axis of the second center channel 122, the central axis of the third center channel 131 coincides with the central axis of the fourth center channel 111, and the central axis of the third center channel 131 and the central axis of the fourth center channel 111 both coincide with the central axis of the first center channel 1011.

[0049] In this embodiment, a fourth protrusion 133 is protruding from the outer wall of the pull rod assembly 1, and the pull claw 60 is located on the side of the fourth protrusion 133 close to the tool 300. The pull claw 60 abuts against the fourth protrusion 133 and is clamped on the pull rod assembly 1, so that the pull claw 60 is axially limited by the abutment between the fourth protrusion 133 and the pull claw 60.

[0050] Specifically, the fourth protrusion 133 is provided on the rod component 101, and the claw 60 is clamped on the rod component 101. Further, the fourth protrusion 133 is provided on the rod joint portion 13, and the claw 60 is clamped on the rod joint portion 13.

[0051] Specifically, the fourth protrusion 133 is a ring-shaped structure.

[0052] In this embodiment, the broaching structure further includes a rod sleeve 30, a sleeve component 50 and a first elastic component 20, and the rod sleeve 30, the sleeve component 50 and the first elastic component 20 are all located in the shaft core 200, that is, the rod sleeve 30, the sleeve component 50 and the first elastic component 20 are all located in the hollow channel of the shaft core 200; the rod sleeve 30 is sleeved on the outside of the rod assembly 1 and is adjustable along the axial position of the rod assembly 1, that is, the rod sleeve 30 is located between the rod assembly 1 and the shaft core 200, and when the axial position of the rod sleeve 30 is adjusted, the rod sleeve 30 and the rod assembly 1 are relatively fixed, and then when the rod assembly 1 is in a fixed position, the rod sleeve 30 is relatively fixed to the rod assembly 1. When the rod assembly 1 moves relative to the shaft core 200 along its axial direction, it drives the rod sleeve 30 to move; the sleeve component 50 is sleeved on the outside of the second end of the rod assembly 1 and is fixedly arranged relative to the shaft core 200, that is, the sleeve component 50 is located between the rod assembly 1 and the shaft core 200; when the rod assembly 1 moves relative to the shaft core 200 along its axial direction, the rod assembly 1 also moves relative to the sleeve component 50; the sleeve component 50 and the rod sleeve 30 are spaced apart in a direction parallel to or the same as the axial direction of the shaft core 200, and the sleeve component 50 is located on the side of the rod sleeve 30 close to the tool 300; the claw 60 is located on the inner side of the sleeve component 50. The first elastic component 20 is located between the rod sleeve 30 and the sleeve component 50 and is telescopically arranged in a direction parallel to or the same as the axial direction of the shaft core 200; when the rod assembly 1 moves in the direction from its first end to its second end, the first elastic component 20 is compressed.

[0053] During the specific implementation, under normal circumstances, the entire pull claw 60 is located inside the sleeve component 50, so that the pull claw 60 is in a closed and tightened state. By applying an axial force to the pull rod assembly 1, the pull rod assembly 1 drives the pull claw 60 to move in the direction from the first end to the second end of the pull rod assembly 1, so that part of the body of the pull claw 60 moves out of the sleeve component 50, so that the pull claw 60 can be opened; during this process, the first elastic member 20 is compressed. When the axial force applied to the pull rod assembly 1 disappears, under the elastic force of the first elastic member 20, the pull rod assembly 1 drives the pull claw 60 to move in the direction from the second end to the first end of the pull rod assembly 1, so that the pull claw 60 returns to the state of being located inside the sleeve component 50 as a whole, thereby changing the pull claw 60 from the open state to the closed and tightened state.

[0054] During the specific implementation process, when part of the body of the claw 60 moves out of the sleeve part 50 and is in an open state, the tool 300 clamped by the claw 60 can be taken out from the claw 60 and detached from the shaft core 200, or the tool 300 can be passed through the shaft core 200 and placed in the claw 60 to clamp the tool 300 after the claw 60 is closed and tightened.

[0055] The axial position of the rod sleeve 30 in the present application is adjustable. For the same first elastic member 20, the first elastic member 20 can be compressed to different degrees when the axial position of the rod sleeve 30 is different. That is, by adjusting the axial position of the rod sleeve 30, the compression degree of the first elastic member 20 can be controlled, thereby conveniently controlling the magnitude of the broaching force. Compared to the prior art, in which the axial distance between the step surface and the shaft shoulder is fixed once the shaft core and rod are machined, making it difficult to adjust the broaching force of the same elastic component, the broaching structure of the present application can solve the problem of the prior art that the broaching force is difficult to control with the broaching structure.

[0056] In addition, by adopting the broach structure of the present application, there is no need to respectively set step surfaces and shoulders on the shaft core and the pull rod for positioning the elastic component, thereby simplifying the processing of the shaft core 200 and the pull rod assembly 1; and since it is also difficult to control the axial distance between the step surface and the shoulder due to respectively setting step surfaces and shoulders on the shaft core and the pull rod for positioning the elastic component, it is difficult to accurately achieve the required degree of compression of the elastic component, and thus it is difficult to accurately achieve the required broach force, but the broach structure of the present application does not have this problem.

[0057] By providing the sleeve component 50, the claw 60 can be moved axially in the sleeve component 50 to achieve the opening or closing of the claw 60, thereby avoiding the need to provide a corresponding structure on the shaft core 200 to cooperate with the claw 60 in order to achieve the opening or closing of the claw 60, thereby reducing the processing difficulty of the shaft core 200.

[0058] Specifically, the first end of the tie rod assembly 1 extends out of the shaft core 200 so that an axial force is applied to the first end of the tie rod assembly 1 .

[0059] Specifically, the first elastic member 20 is a coil spring.

[0060] Specifically, the rod sleeve 30 and the sleeve component 50 are both sleeved on the outside of the rod component 101. Further, the rod sleeve 30 is sleeved on the outside of the rod 11, and the sleeve component 50 is sleeved on the outside of the rod 11 and the rod joint portion 13.

[0061] In this embodiment, the rod sleeve 30 is threadedly connected to the rod assembly 1 so that the axial position of the rod sleeve 30 can be adjusted by relatively rotating the rod sleeve 30 and the rod assembly 1 .

[0062] Specifically, since the rod sleeve 30 is sleeved on the outside of the rod component 101, the rod sleeve 30 is threadedly connected to the rod component 101. Further, the rod sleeve 30 is threadedly connected to the rod 11; that is, the rod sleeve 30 is provided with an internal thread, and the rod 11 is provided with an external thread.

[0063] Specifically, the inner wall surface of the sixth channel section 1311 is provided with an internal thread, the outer wall surface of the second end of the pull rod 11 is provided with an external thread, and the pull rod joint part 13 and the pull rod 11 are threadedly connected to make the pull rod joint part 13 and the pull rod 11 relatively fixed.

[0064] In this embodiment, the broaching structure further includes a ball sleeve 21, which is sleeved on the outside of the drawbar assembly 1. The ball sleeve 21 is located between the first elastic member 20 and the sleeve member 50 in a direction parallel to or the same as the axial direction of the shaft core 200. One end of the ball sleeve 21 abuts against the first elastic member 20, and the other end of the ball sleeve 21 abuts against the sleeve member 50. Since the ball sleeve 21 is acted upon by the first elastic member 20, the ball sleeve 21 and the sleeve member 50 are relatively fixed in the axial direction. The provision of the ball sleeve 21 allows the first elastic member 20 to undergo a certain circumferential torsion, thereby reducing the circumferential torsion applied to the first elastic member 20 when compressed, thereby stabilizing the broaching force of the first elastic member 20 and improving the service life of the first elastic member 20.

[0065] Specifically, the ball sleeve 21 is sleeved on the outside of the pull rod component 101 ; that is, the ball sleeve 21 is sleeved on the outside of the pull rod 11 .

[0066] In this embodiment, a third protrusion 521 is protruded from the inner wall surface of the sleeve part 50, and the pull rod joint part 13 is sleeved on the outside of the second end of the pull rod 11. The pull rod joint part 13 is located on the side of the third protrusion 521 close to the tool 300 and abuts against the third protrusion 521, so as to limit the axial movement of the pull rod assembly 1 through the abutment cooperation between the pull rod joint part 13 and the third protrusion 521.

[0067] Specifically, the sleeve component 50 includes a sleeve portion 51 and a joint sleeve 52 which are connected or abutted with each other along the axial direction of the pull rod assembly 1, and the joint sleeve 52 is located on the side of the sleeve portion 51 close to the tool 300; the third protrusion 521 is arranged on the inner wall surface of the joint sleeve 52; the sleeve portion 51 is sleeved on the outside of the pull rod 11, and the joint sleeve 52 is sleeved on the outside of the pull rod 11 and the pull rod joint portion 13; the first elastic member 20 is arranged between the pull rod sleeve 30 and the sleeve portion 51, and the ball sleeve 21 is arranged between the first elastic member 20 and the sleeve portion 51, that is, the other end of the ball sleeve 21 abuts against the sleeve portion 51.

[0068] Specifically, along the axial direction of the shaft core 200 , the pulling claw 60 moves out from the side of the joint sleeve 52 away from the sleeve portion 51 , so that the pulling claw 60 is transformed into an open state.

[0069] Specifically, the third protrusion 521 is a ring-shaped structure.

[0070] In this embodiment, a notch 112 is provided on the outer wall of the tie rod assembly 1, and a mounting hole 31 is provided on the inner wall of the tie rod sleeve 30. The mounting hole 31 extends from the inner wall of the tie rod sleeve 30 to the outer wall of the tie rod sleeve 30, that is, the ends of the mounting hole 31 extend to the inner wall of the tie rod sleeve 30 and the outer wall of the tie rod sleeve 30, respectively. By inserting a fastener into the mounting hole 31 and the notch 112, the tie rod assembly 1 and the tie rod sleeve 30 are relatively fixed. Optionally, the mounting hole 31 is a threaded through hole, and the fastener is a jackscrew.

[0071] Specifically, the notch 112 is provided on the outer wall surface of the pull rod component 101 , that is, the notch 112 is provided on the outer wall surface of the pull rod 11 .

[0072] Optionally, the outer wall surface of the pull rod assembly 1 is provided with a plurality of slots 112 distributed along its circumferential spaced apart, that is, the outer wall surface of the pull rod 11 is provided with a plurality of slots 112 distributed along its circumferential spaced apart; there are multiple mounting holes 31, and the multiple slots 112 and the multiple mounting holes 31 are provided in a one-to-one correspondence; there are multiple fasteners, and the multiple fasteners are provided in a one-to-one correspondence with the multiple mounting holes 31, and the multiple fasteners are provided in a one-to-one correspondence with the multiple slots 112, and each fastener is passed through the corresponding slot 112 and the corresponding mounting hole 31.

[0073] In this embodiment, an annular groove 134 is recessed into the inner wall surface of the seventh channel section 1312 of the tie rod joint portion 13. Along the axial direction of the tie rod joint portion 13, a first end of the annular groove 134 is spaced apart from the sixth channel section 1311, and a second end of the annular groove 134 extends to the end surface of the tie rod joint portion 13 near the tool 300, thereby facilitating assembly and disassembly of the connector rod 12. Optionally, the cross-section of the circumferential groove wall of the annular groove 134, perpendicular to the axial direction of the tie rod joint portion 13, is hexagonal.

[0074] In this embodiment, a sealing ring 135 is provided between the tie rod joint portion 13 and the sleeve component 50 , that is, the sealing ring 135 is provided between the tie rod joint portion 13 and the joint sleeve 52 .

[0075] In this embodiment, the tool 300 includes a clasp 310 and a handle 320. The clasp 310 and the handle 320 are locked by threads. The handle 320 is used to be inserted into the through hole of the shaft core 200, and the outer peripheral surface of the handle 320 is in contact with the wall of the through hole. Along the axial direction of the shaft core 200, the clasp 310 is located on the side of the handle 320 close to the pull rod assembly 1. The clasp 310 is used to abut against the connector rod 12, and the pull claw 60 is clamped on the clasp 310 of the tool 300. When the pull claw 60 clamps the tool 300 to be in the broaching state, the clasp 310 abuts against the connector rod 12, so that the connector rod 12 also plays a certain fixing role on the tool 300.

[0076] In this embodiment, the pulling claw 60 includes a plurality of claw bodies 61 arranged at intervals around the central axis of the shaft core 200. Along the axial direction of the shaft core 200, each claw body 61 has a first end and a second end arranged opposite to each other, and the direction from the first end to the second end of each claw body 61 is the same as the direction from the first end to the second end of the shaft core 200; the second end of each claw body 61 moves in a direction close to or away from the central axis of the shaft core 200 to open or close the pulling claw 60.

[0077] In this embodiment, a fifth protrusion 201 is provided on the inner wall of the shaft core 200, and a sixth protrusion 522 is provided on the outer wall of the sleeve member 50. Along the axial direction of the shaft core 200, the sixth protrusion 522 is located on a side of the fifth protrusion 201 that is away from the second end of the shaft core 200. The sixth protrusion 522 abuts against the fifth protrusion 201, thereby limiting the axial position of the sleeve member 50 through the abutment between the sixth protrusion 522 and the fifth protrusion 201. The sixth protrusion 522 is provided on the outer wall of the joint sleeve 52.

[0078] Specifically, the sixth protrusion 522 and the fifth protrusion 201 are both annular structures.

[0079] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0080] In the broaching tool structure provided by the present invention, the broaching tool structure includes a shaft core 200, a cutting tool 300, a drawbar assembly 1, and a claw 60. The shaft core 200 is rotatably arranged around its central axis; the cutting tool 300 is inserted through the second end of the shaft core 200; the axial direction of the drawbar assembly 1 is parallel to the axial direction of the shaft core 200, and the drawbar assembly 1 is movably inserted into the shaft core 200 from the first end of the shaft core 200 along its axial direction. The claw 60 is connected to the end of the drawbar assembly 1 near the cutting tool 300, so that the drawbar assembly 1 drives the claw 60 to move axially; when the drawbar assembly 1 drives the claw 60 to move, the claw 60 opens or closes, thereby causing the claw 60 to release the cutting tool 300 or clamp the cutting tool 300. Among them, the tie rod assembly 1 has an air flow channel 103 and multiple air outlet holes 123. The air flow channel 103 is extended along the axial direction of the tie rod assembly 1, and the two ends of the air flow channel 103 extend to the two end surfaces of the tie rod assembly 1 respectively; the extension direction of each air outlet hole 123 is set at an acute angle to the axial direction of the tie rod assembly 1, the first end of each air outlet hole 123 is connected to the air flow channel 103, and the second end of each air outlet hole 123 extends to the second end surface of the tie rod assembly 1.

[0081] During the specific implementation process, when the pulling claw 60 clamps the tool 300 to be in the pulling state, the pulling claw 60 fixes the tool 300 so that the tool 300 and the shaft core 200 are relatively fixed, and then the tool 300 rotates with the shaft core 200 so that the tool 300 can perform processing operations. When the pulling claw 60 is opened, the tool 300 can be moved out of the pulling claw 60 and detached from the shaft core 200. At this time, air is introduced into the air flow channel 103 from the first end of the air flow channel 103. After passing through the air flow channel 103, the air flow is ejected from the second end of the air flow channel 103 and the multiple air outlet holes 123. Since the extension direction of each air outlet hole 123 is set at an acute angle to the axial direction of the pull rod assembly 1, the air flow ejected from the second end of the air flow channel 103 and the multiple air outlet holes 123 can better clean the penetration hole of the shaft core 200 for the tool 300 to penetrate, so as to have a good cleaning effect on the penetration hole of the shaft core 200; and the penetration hole of the shaft core 200 is usually a conical hole, so the broaching tool structure of the present application solves the problem that the broaching tool structure in the prior art has a poor cleaning effect on the conical hole of the shaft core.

[0082] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0083] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0084] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A broach structure, characterized in that: include: An axis core (200), the axis core (200) being rotatably arranged around its central axis; a tool (300), the tool (300) being inserted through the second end of the shaft core (200); A pull rod assembly (1), wherein the axial direction of the pull rod assembly (1) is parallel to the axial direction of the shaft core (200), and the pull rod assembly (1) is movably disposed in the shaft core (200) from the first end of the shaft core (200) along its axial direction; A pulling claw (60), the pulling claw (60) being connected to an end of the pull rod assembly (1) close to the tool (300), so that when the pull rod assembly (1) drives the pulling claw (60) to move, the pulling claw (60) opens or closes, thereby releasing or clamping the tool (300); The tie rod assembly (1) has an air flow channel (103) and a plurality of air outlet holes (123), wherein the air flow channel (103) is extended along the axial direction of the tie rod assembly (1), and the two ends of the air flow channel (103) respectively extend to the two end faces of the tie rod assembly (1); the extension direction of each of the air outlet holes (123) is set at an acute angle to the axial direction of the tie rod assembly (1), the first end of each of the air outlet holes (123) is connected to the air flow channel (103), and the second end of each of the air outlet holes (123) extends to the second end face of the tie rod assembly (1); the second end of each of the air outlet holes (123) is located at the edge of the second end face of the tie rod assembly (1); The pull rod assembly (1) comprises: a pull rod component (101), the axial direction of the pull rod component (101) is the same as the axial direction of the pull rod assembly (1), the pull rod component (101) has a first central channel (1011), and the two ends of the first central channel (1011) respectively extend to the two end surfaces of the pull rod component (101); the first central channel (1011) comprises a first channel section (1012) and a second channel section (1013), the inner wall surface of the first channel section (1012) is located on the side of the inner wall surface of the second channel section (1013) close to the central axis of the pull rod component (101), and the second channel section (1013) is located on the side of the first channel section (1012) close to the tool (300); the pulling claw (60) is connected to the end of the pull rod component (101) close to the tool (300); a joint rod (12), the axial direction of the joint rod (12) is aligned with the axis of the pull rod assembly (1). The connecting rod (12) is provided in the second channel section (1013) in the same direction; the connecting rod (12) has a second central channel (122), and the two ends of the second central channel (122) extend to the two end surfaces of the connecting rod (12) respectively; a second elastic member (15), the second elastic member (15) is provided in the second channel section (1013), the telescopic direction of the second elastic member (15) is the same as the axial direction of the pull rod assembly (1), the first end of the second elastic member (15) abuts against the step surface formed by the first channel section (1012) and the second channel section (1013), and the second end of the second elastic member (15) abuts against the connecting rod (12); the first channel section (1012), a part of the channel section of the second channel section (1013) and the second central channel (122) form the airflow channel (103); the multiple air outlet holes (123) are all provided on the connecting rod (12).

2. The broach structure according to claim 1, characterized in that: The pull rod component (101) comprises: A pull rod (11), wherein the axial direction of the pull rod (11) is the same as the axial direction of the pull rod component (101), and the pull rod (11) is provided with a fourth central channel (111) extending along the axial direction thereof, and both ends of the fourth central channel (111) respectively extend to the two end surfaces of the pull rod (11), and the fourth central channel (111) includes a fourth channel section (1111) and a fifth channel section (1112) interconnected along the axial direction thereof, and the inner wall surface of the fifth channel section (1112) is located on a side of the inner wall surface of the fourth channel section (1111) away from the central axis of the fourth central channel (111); The pull rod joint part (13) has an axial direction that is the same as the axial direction of the pull rod component (101), and the pull rod joint part (13) is provided with a third central channel (131) extending along its axial direction, and both ends of the third central channel (131) extend to the two end surfaces of the pull rod joint part (13) respectively; the third central channel (131) includes a sixth channel section (1311) and a seventh channel section (1312) that are interconnected along its axial direction, and the inner wall surface of the sixth channel section (1311) is located at the seventh channel section (1312). 2) on a side of the inner wall surface away from the central axis of the third central channel (131); the pull rod joint portion (13) is sleeved on the outer side of the second end of the pull rod (11) through the sixth channel segment (1311), so that the fifth channel segment (1112) and the seventh channel segment (1312) are connected and together form the second channel segment (1013), and the fourth channel segment (1111) forms the first channel segment (1012); the pulling claw (60) is connected to an end of the pull rod joint portion (13) close to the tool (300).

3. The broach structure according to claim 1, characterized in that: A first protrusion (132) is provided on the inner wall surface of the second channel section (1013), and a second protrusion (121) is provided on the outer wall of the joint rod (12). The second protrusion (121) is located on a side of the first protrusion (132) away from the tool (300), and the second protrusion (121) is used to abut against the first protrusion (132).

4. The broach structure according to claim 1, characterized in that: A fourth protrusion (133) is protruded from the outer wall of the pull rod assembly (1), and the pull claw (60) is located on a side of the fourth protrusion (133) close to the tool (300). The pull claw (60) abuts against the fourth protrusion (133) and is clamped on the pull rod assembly (1).

5. The broach structure according to claim 1, characterized in that: The broach structure further comprises: A pull rod sleeve (30), the pull rod sleeve (30) being sleeved on the outside of the pull rod assembly (1) and being adjustably arranged along the axial position of the pull rod assembly (1); A sleeve component (50), the sleeve component (50) is sleeved on the outside of the second end of the pull rod assembly (1) and is fixedly arranged relative to the shaft core (200); the sleeve component (50) and the pull rod sleeve (30) are spaced apart along a direction parallel to or the same as the axial direction of the shaft core (200), and the sleeve component (50) is located on a side of the pull rod sleeve (30) close to the tool (300); the pulling claw (60) is located on the inner side of the sleeve component (50); A first elastic member (20) is located between the pull rod sleeve (30) and the sleeve component (50) and is telescopically arranged in a direction parallel to or in the same direction as the axial direction of the shaft core (200).

6. The broach structure according to claim 5, characterized in that: The pull rod sleeve (30) is threadedly connected to the pull rod assembly (1).

7. The broach structure according to claim 5, characterized in that: The broach structure further comprises a ball sleeve (21), which is sleeved on the outside of the drawbar assembly (1), one end of the ball sleeve (21) abuts against the first elastic member (20), and the other end of the ball sleeve (21) abuts against the sleeve member (50).

8. The broach structure according to claim 5, characterized in that: A third protrusion (521) is convexly provided on the inner wall surface of the sleeve component (50), and the pull rod assembly (1) includes a pull rod (11) and a pull rod joint portion (13), and the axial direction of the pull rod (11) and the axial direction of the pull rod joint portion (13) are both the same as the axial direction of the pull rod assembly (1); the pull rod joint portion (13) is sleeved on the outside of the second end of the pull rod (11), and the pull rod joint portion (13) is located on the side of the third protrusion (521) close to the tool (300) and abuts against the third protrusion (521).

9. The broach structure according to claim 5, characterized in that: The outer wall surface of the pull rod assembly (1) is provided with a notch (112), and the inner wall surface of the pull rod sleeve (30) is provided with a mounting hole (31). The mounting hole (31) passes through the inner wall surface of the pull rod sleeve (30) to the outer wall surface of the pull rod sleeve (30), and a fastener is passed through the mounting hole (31) and the notch (112) to relatively fix the pull rod assembly (1) and the pull rod sleeve (30).

Images