Deburring tool for valve element hole

Abstract

The utility model discloses a deburring tool for a valve core hole, which comprises a rotating shaft, a guide positioning sleeve is sleeved outside the rotating shaft, a push rod is arranged in the rotating shaft, a holding component is mounted at the rear end of the rotating shaft, and a cutter component comprises a cutter mounting body mounted at the head end of the rotating shaft. A first channel and a second channel which are communicated and vertically arranged are formed in the tool mounting body, a tool bit part capable of moving up and down along the second channel is arranged in the second channel, a pushing inclined surface at the bottom of the tool bit part is in contact with a steel ball arranged in the first channel, and a chamfering tool bit is arranged at the top end of the tool bit part and extends out of the top of the tool mounting body; the end of the push rod can push the steel ball to move and drive the tool bit part to move up and down, the holding assembly is combined with the step limiting ring groove in the push rod, and the extending height of the tool bit part can be controlled. And burrs at all parts of the valve core hole can be stably, accurately and finely removed in a limited space.

Description

Technical Field

[0001] This utility model belongs to the field of instrument processing technology, specifically relating to a deburring tool for valve core holes. Background Technology

[0002] The valve core hole of the automotive retarder housing has a coaxial multi-hole structure. During the production process, scrapers and scissor-type deburring tools are usually used in combination to remove burrs from the valve core hole (inner hole) and the side walls of the multiple sections of the blank. When using a scraper, it is not easy to operate because the space between the side walls is narrow. When using a scissor-type deburring tool, the tool cannot be fixed and it is easy to scratch the surface of the valve core hole when it is inserted into the valve core hole, which affects the processing quality of the workpiece and results in a high defect rate. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a deburring tool for valve core holes, which can solve the technical problems of difficult operation, poor processing quality and high defect rate in the deburring process of existing tooling.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A deburring tool for valve core holes includes a rotating shaft, a guide positioning sleeve fitted around the rotating shaft, a tool assembly mounted at the head end of the rotating shaft, and a holding assembly mounted at the rear end of the rotating shaft.

[0006] The rotating shaft has a guide channel extending through it along its length. A push rod is installed in the guide channel. The tail end of the push rod extends out of the tail end of the rotating shaft and is connected to a push rod head. A threaded hole is provided on the end face of the head end of the rotating shaft.

[0007] The tool assembly includes a tool mounting body, a guide cover plate is mounted on the upper surface of the tool mounting body, a tool head and a steel ball are mounted inside the tool mounting body, and a threaded through hole coaxial with the threaded hole is opened at the rear end of the tool mounting body. The tool assembly is mounted on the head end of the rotating shaft by a long screw.

[0008] The tool mounting body is cubic in shape, with a first channel and a second channel connected within it. The opening end of the first channel penetrates the rear sidewall of the tool mounting body and is coaxially arranged with the guide channel. The opening end of the second channel penetrates the upper surface of the tool mounting body. A guide through hole coaxially arranged with the second channel is provided on the guide cover plate. The tool head includes a chamfered tool head, a tool head base, and a compression spring, all coaxially arranged. The chamfered tool head is located in the second channel, and the tool head base is located in the first channel. The bottom end of the chamfered tool head is fixedly connected to the upper surface of the tool head base. A pushing slope is machined at the bottom end of the tool head base. The compression spring is inverted on the chamfered tool head, with its bottom end contacting the upper surface of the tool head base and its top end contacting the lower surface of the guide cover plate. The steel ball is located in the first channel and contacts the pushing slope. The head of the push rod can extend into the first channel and contact the steel ball. The tool head can move up and down along the second channel, and the top end of the chamfered tool head can extend out of the guide cover plate through the guide through hole.

[0009] This utility model also includes the following technical features:

[0010] The gripping assembly includes a guide sleeve, a guide rod inside the guide sleeve, a pressure cap on the top of the guide sleeve, and a handle on the top of the pressure cap. The handle includes an integrally formed connecting plate and a handle piece. A first through hole is opened on the top of the pressure cap, and a second through hole is opened on the connecting plate. The first through hole and the second through hole are coaxially arranged. An external thread is machined on the outer wall of the top end of the guide rod and a first nut is fitted on it. The top end of the guide rod passes through the first through hole and the second through hole in sequence and is connected to a second nut. The first nut abuts against the lower surface of the top of the pressure cap. The guide rod, the pressure cap, and the handle are fixed as a whole by tightening the second nut. An internal thread is machined on the inner surface of the pressure cap, and an external thread matching the internal thread is machined on the outer wall of the guide sleeve.

[0011] The rotating shaft has a mounting hole on its side wall that communicates with the guide channel. The mounting hole has an internal thread that matches the external thread of the guide sleeve. The bottom end of the guide sleeve is installed in the mounting hole.

[0012] The bottom end face of the guide rod is provided with a limiting protrusion. The push rod is clearance-fitted with the guide channel. The side wall of the push rod near the push rod head is machined with a multi-stage stepped limiting ring groove. The top end of the guide rod can extend into the guide through hole so that the limiting protrusion contacts the limiting ring groove.

[0013] The guide positioning sleeve is coaxially arranged with the rotating shaft. The guide positioning sleeve includes a cylindrical guide body fitted on the rotating shaft, and a positioning plate coaxially arranged with the rear end of the guide body is integrally machined.

[0014] The diameter of the guide hole matches the diameter of the chamfering cutter head. A guide protrusion is machined on the inner wall of the guide hole, and a groove matching the guide protrusion is formed on the chamfering cutter head.

[0015] The chamfering cutter head is a 90° double-edged chamfering cutter head.

[0016] The angle between the inclined plane and the central axis of the cutter head base is 115° to 120°.

[0017] The diameter of the first channel is not less than the diameter of the guide channel.

[0018] The steel ball is matched with the diameter of the first channel.

[0019] The positioning plate is provided with bolt through holes.

[0020] Compared with the prior art, this utility model has the following technical effects:

[0021] This utility model has a reasonable structure and is easy to operate. It has guiding and limiting functions, and can stably and accurately perform fine deburring operations on the front and back deburring positions of each part of the valve core hole in a limited space without scratching the surface of the tooling valve core hole. It improves processing efficiency and increases the yield of workpieces. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0023] Figure 2 This is a cross-sectional view of the overall structure of this utility model.

[0024] Figure 3 This is a cross-sectional view of the rotating shaft of this utility model.

[0025] Figure 4 This is a schematic diagram of the head end face of the rotating shaft of this utility model.

[0026] Figure 5 This is a schematic diagram of the push rod structure of this utility model.

[0027] Figure 6 This is a cross-sectional view of the tool mounting body of this utility model.

[0028] Figure 7 This is a schematic diagram of the rear end face of the tool mounting body of this utility model.

[0029] Figure 8 This is a schematic diagram of the blade head structure of this utility model.

[0030] Figure 9 This is a schematic diagram of the structure of the guide cover plate of this utility model.

[0031] Figure 10 This is a schematic diagram of the guide rod of this utility model.

[0032] Figure 11 This is a schematic diagram of the structure of the pressure cap of this utility model.

[0033] Figure 12 This is a schematic diagram of the handle of this utility model.

[0034] The meanings of the labels in the diagram are as follows:

[0035] 1. Rotary shaft; 11. Guide channel; 12. Push rod; 13. Push rod head; 14. Threaded hole; 15. Mounting hole; 16. Limiting ring groove; 2. Guide positioning sleeve; 21. Guide body; 22. Positioning plate; 23. Bolt through hole; 3. Tool assembly; 31. Tool mounting body; 32. Guide cover plate; 33. Tool head; 34. Steel ball; 35. Threaded through hole; 311. First channel; 312. Second channel; 32. 1. Guide through hole; 322. Guide protrusion; 331. Chamfered cutter head; 332. Cutter head base; 333. Compression spring; 334. Advancing slope; 335. Groove; 4. Holding assembly; 41. Guide sleeve; 42. Guide rod; 43. Pressure cap; 44. Handle; 45. First nut; 46. Second nut; 47. Limiting protrusion; 431. First through hole; 441. Connecting plate; 442. Handle piece; 443. Second through hole.

[0036] The specific content of this utility model will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0037] Following the above technical solution, the following are specific embodiments of this utility model. It should be noted that this utility model is not limited to the following specific embodiments, and all equivalent modifications made based on the technical solution of this application fall within the protection scope of this utility model.

[0038] In this utility model, unless otherwise stated, directional terms such as "upper", "lower", "front", "rear", "top", and "tail" are generally defined based on the drawing in the corresponding figure, and "inner" and "outer" refer to the inner and outer contours of the corresponding components.

[0039] Example:

[0040] This embodiment provides a deburring tool for valve core holes, such as... Figures 1 to 12 As shown, it includes a rotating shaft 1, a guide positioning sleeve 2 is fitted around the rotating shaft 1, a tool assembly 3 is installed at the head end of the rotating shaft 1, and a holding assembly 4 is installed at the rear end of the rotating shaft 1.

[0041] A guide channel 11 is provided through the rotating shaft 1 along its length. A push rod 12 is provided in the guide channel 11. The tail end of the push rod 12 extends out of the tail end of the rotating shaft 1 and is connected to a push rod head 13. A threaded hole 14 is provided on the end face of the head end of the rotating shaft 1.

[0042] The tool assembly 3 includes a tool mounting body 31, a guide cover plate 32 is mounted on the upper surface of the tool mounting body 31, a tool head 33 and a steel ball 34 are mounted inside the tool mounting body 31, and a threaded through hole 35 coaxially arranged with the threaded hole 14 is opened at the rear end of the tool mounting body 31. The tool assembly 3 is mounted on the head end of the rotating shaft 1 by a long screw.

[0043] The tool mounting body 31 is cubic in shape. A first channel 311 and a second channel 312 are connected within the tool mounting body 31. The opening end of the first channel 311 penetrates the rear sidewall of the tool mounting body 31 and is coaxially arranged with the guide channel 11. The opening end of the second channel 312 penetrates the upper surface of the tool mounting body 31. A guide through hole 321, coaxially arranged with the second channel 312, is provided on the guide cover plate 32. The tool head 33 includes a chamfering tool head 331, a tool head base 332, and a compression spring 333, all coaxially arranged. The chamfering tool head 331 is disposed within the second channel 312, and the tool head base 332 is disposed within the first channel 311. The bottom end of the head 331 is fixedly connected to the upper surface of the cutter head base 332. The bottom end of the cutter head base 332 is machined with a pushing slope 334. The compression spring 333 is inverted on the chamfering cutter head 331. The bottom end of the compression spring 333 is in contact with the upper surface of the cutter head base 332, and the top end of the compression spring 333 is in contact with the lower surface of the guide cover plate 32. The steel ball 34 is set in the first channel 311 and is in contact with the pushing slope 334. The head end of the push rod 12 can extend into the first channel 311 and contact the steel ball 34. The cutter head 33 can move up and down along the second channel 312. The top end of the chamfering cutter head 331 can pass through the guide through hole 321 and extend out of the guide cover plate 32.

[0044] In this example, the guide positioning sleeve 2 is fitted with the workpiece valve core hole with a clearance to support and guide the rotating shaft 1. The rotating shaft 1 can move axially under the support of the guide positioning sleeve 2, sending the tool assembly 3 to the position on the workpiece where deburring is required, preventing the rotating shaft 1 from deviating axially. The holding assembly 4 can control the circumferential rotation of the rotating shaft 1, causing the top of the tool assembly 3 to rotate circumferentially. The push rod head 13 can drive the push rod 12 to move back and forth along the guide channel 11, thereby driving the steel ball 34 to move back and forth. The steel ball 34 cooperates with the feed inclined surface 334, which can push the cutter head 33 to move up and down along the second channel 312, thereby enabling chamfering. The top of the cutter head 331 extends out of the tool mounting body 31 to remove burrs at the corresponding position. The compression spring 333 is set so that when the push rod 12 moves backward, the steel ball 34 is not pushed by the push rod 12. The compression spring 333 rebounds from the compressed state to the initial state and applies a downward push to the cutter head base 332. The steel ball 34 moves backward under the push of the cutter head base 332, so that the chamfering cutter head 331 moves downward and retracts into the tool mounting body 31 under the drive of the cutter head base 332. It can stably and accurately remove burrs on the tooling in a limited space without scratching the surface of the tooling valve core hole, thus improving the yield of the processed workpiece.

[0045] As a preferred embodiment, the gripping component 4 includes a guide sleeve 41, a guide rod 42 is provided inside the guide sleeve 41, a pressure cap 43 is installed on the top of the guide sleeve 41, and a handle 44 is provided on the top of the pressure cap 43. The handle 44 includes an integrally formed connecting plate 441 and a handle plate 442. A first through hole 431 is opened on the top of the pressure cap 43, and a second through hole 443 is opened on the connecting plate 441. The first through hole 431 and the second through hole 443 are coaxially arranged. An external thread is machined on the outer wall of the top end of the guide rod 42 and a first nut 45 is fitted on it. The top end of the guide rod 42 passes through the first through hole 431 and the second through hole 443 in sequence and is connected to a second nut 46. The first nut 45 abuts against the lower surface of the top of the pressure cap 43. By tightening the second nut 46, the guide rod 42, the pressure cap 43 and the handle 44 are fixed as a whole. An internal thread is machined on the inner surface of the pressure cap 43, and an external thread matching the internal thread is machined on the outer wall of the guide sleeve 41.

[0046] The side wall of the rotating shaft 1 is provided with a mounting hole 15 that communicates with the guide channel 11. The mounting hole 15 is machined with an internal thread that matches the external thread of the guide sleeve 41. The bottom end of the guide sleeve 41 is installed in the mounting hole 15. The bottom end of the guide rod 42 is close to the bottom end of the mounting hole 15. Rotating the pressure cap 43 can drive the guide rod 42 and the handle 44 to move up and down relative to the guide sleeve 41. The handle 44 makes the rotation operation more time-saving and labor-saving. During the tightening process of the pressure cap 43, the top end of the guide rod 42 can extend out of the bottom end of the mounting hole 15 and abut against the side wall of the push rod 12. To a certain extent, this can prevent the push rod 12 from moving axially, thereby avoiding the problem of the chamfering cutter head 331 extending too far and scratching the inner wall of the workpiece or retracting to the tool mounting seat 31 and failing to effectively remove burrs.

[0047] Furthermore, a limiting protrusion 47 is provided on the bottom end face of the guide rod 42, and the push rod 12 is clearance-fitted with the guide channel 11. A multi-stage stepped limiting ring groove 16 is machined on the side wall of the push rod 12 near the push rod head 13. The top end of the guide rod 42 can extend into the guide through hole 321 so that the limiting protrusion 47 contacts the limiting ring groove 16. The multi-stage stepped structure of the limiting ring groove 16 can control the forward movement length of the push rod 12, thereby controlling the extension length of the chamfering cutter head 331, which can deburr the inner wall of workpieces with different inner diameters.

[0048] As a preferred embodiment, the guide positioning sleeve 2 is coaxially arranged with the rotating shaft 1. The guide positioning sleeve 2 includes a cylindrical guide body 21 fitted on the rotating shaft 1. The rear end of the guide body 21 is integrally machined with a positioning plate 22 coaxially arranged with the guide body 21. The guide body 21 is clearance-fitted with the valve core hole of the workpiece. The positioning plate 22 is abutted against the outer wall of the initial section of the valve core hole to keep the guide positioning sleeve 2 fixed.

[0049] As a preferred embodiment, the diameter of the guide hole 321 matches the diameter of the chamfering head 331. A guide protrusion 322 is machined on the inner wall of the guide hole 321, and a groove 335 matching the guide protrusion 322 is provided on the chamfering head 331. The guide protrusion 322 and the groove 335 cooperate to prevent the chamfering head 331 from swinging during operation, which would affect the deburring result.

[0050] As a preferred embodiment, the chamfering cutter 331 in this embodiment is a 90° double-edged chamfering cutter with symmetrically arranged double edges, which can remove burrs from both ends of the valve core hole from both directions.

[0051] As a preferred embodiment, the angle between the advancing inclined surface 334 and the central axis of the cutter head base 332 is 115° to 120°. This angle setting facilitates the upward retraction of the cutter head 33 by the steel ball 34.

[0052] As a preferred embodiment, the diameter of the first channel 311 is not less than the diameter of the guide channel 11, so that the top of the push rod 12 can smoothly enter the first channel 311 to push the steel ball 34.

[0053] As a preferred embodiment, the diameter of the steel ball 34 is matched with that of the first channel 311, so that the steel ball 34 can only move along the axial direction of the first channel 311, and apply a uniform thrust to the cutter head 33, so as to avoid the chamfering cutter head 331 from swaying and colliding with the inner wall of the second channel 312 and being damaged when it moves up and down.

[0054] As a preferred embodiment, the positioning plate 22 in this embodiment is provided with a bolt through hole 23. When there is a threaded hole on the outer wall of the initial section of the workpiece valve core hole, the bolt through hole 23 can be fixedly connected to the threaded hole by a fastener, so that the position of the guide positioning sleeve 2 is fixed, thereby avoiding the guide positioning sleeve 2 from rotating in the workpiece valve core hole and causing damage to its surface.

[0055] In actual operation of this embodiment:

[0056] The guide positioning sleeve 2 is fixed or installed on the initial end valve core hole of the multi-segment valve core hole. The rotating shaft 1 is pushed or pulled to position the cutter head assembly 3 at a certain valve core hole segment. The push rod head 13 pushes the push rod 12 forward, and the top of the push rod 12 pushes the steel ball 34. The steel ball 34 cooperates with the advancing inclined surface 334 to lift the cutter head 33 upwards until the chamfering cutter head 331 extends to the position of the burr to be treated. The rotating handle 44 drives the pressure cap 43 and the guide rod 42 to move downwards along the guide sleeve 41 until the limiting protrusion 47 abuts against the corresponding limiting ring groove 16, keeping the chamfering cutter head 331 fixed. When the gripping assembly 4 rotates simultaneously with the rotating shaft 1 and the cutting tool assembly 3, the burrs on the corresponding valve core hole are removed. After processing, the handle 44 drives the pressure cover 43 and the guide rod 42 to move upward along the guide sleeve 41. The limiting protrusion 47 separates from the surface of the push rod 12 and retracts into the guide sleeve 41. The compression spring 333 rebounds from the compressed state to the initial state, applying a downward pushing force to the cutting head base 332. The steel ball 34 moves backward under the pushing force of the cutting head base 332, causing the chamfering cutting head 331 to move downward and retract into the cutting tool mounting body 31 under the drive of the cutting head base 332. The operation is completed.

Claims

1. A deburring tool for valve core holes, characterized in that, It includes a rotating shaft (1), a guide positioning sleeve (2) is fitted around the rotating shaft (1), a tool assembly (3) is installed at the head end of the rotating shaft (1), and a holding assembly (4) is installed at the rear end of the rotating shaft (1). The rotating shaft (1) has a guide channel (11) extending through it along its length. A push rod (12) is provided in the guide channel (11). The tail end of the push rod (12) extends out of the tail end of the rotating shaft (1) and is connected to a push rod head (13). A threaded hole (14) is provided on the head end face of the rotating shaft (1). The tool assembly (3) includes a tool mounting body (31), a guide cover plate (32) is mounted on the upper surface of the tool mounting body (31), a tool head (33) and a steel ball (34) are mounted inside the tool mounting body (31), and a threaded through hole (35) coaxially arranged with the threaded hole (14) is opened at the rear end of the tool mounting body (31). The tool assembly (3) is mounted on the head end of the rotating shaft (1) by a long screw. The tool mounting body (31) is cubic in shape. A first channel (311) and a second channel (312) are connected within the tool mounting body (31). The opening end of the first channel (311) penetrates the rear sidewall of the tool mounting body (31) and is coaxially arranged with the guide channel (11). The opening end of the second channel (312) penetrates the upper surface of the tool mounting body (31). A guide through hole (321) coaxially arranged with the second channel (312) is provided on the guide cover plate (32). The tool head (33) includes a chamfering tool head (331), a tool head base (332), and a compression spring (333) arranged coaxially. The chamfering tool head (331) is located within the second channel (312), and the tool head base (332) is located within the first channel (311). The bottom end of the cutter head (331) is fixedly connected to the upper surface of the cutter head base (332). The bottom end of the cutter head base (332) is machined with a pushing slope (334). The compression spring (333) is inverted on the chamfering cutter head (331). The bottom end of the compression spring (333) is in contact with the upper surface of the cutter head base (332). The top end of the compression spring (333) is in contact with the lower surface of the guide cover plate (32). The steel ball (34) is set in the first channel (311) and is in contact with the pushing slope (334). The head end of the push rod (12) can extend into the first channel (311) and contact the steel ball (34). The cutter head (33) can move up and down along the second channel (312). The top end of the chamfering cutter head (331) can pass through the guide through hole (321) and extend out to the outside of the guide cover plate (32).

2. The deburring tool for valve core holes as described in claim 1, characterized in that, The gripping assembly (4) includes a guide sleeve (41), a guide rod (42) is provided inside the guide sleeve (41), a pressure cap (43) is installed on the top of the guide sleeve (41), a handle (44) is provided on the top of the pressure cap (43), the handle (44) includes an integrally formed connecting plate (441) and a handle piece (442), a first through hole (431) is opened on the top of the pressure cap (43), a second through hole (443) is opened on the connecting plate (441), the first through hole (431) and the second through hole (443) are coaxially arranged, and the guide rod (42) is... The top outer wall of the guide rod (42) is machined with external threads and fitted with a first nut (45). The top of the guide rod (42) passes through the first through hole (431) and the second through hole (443) and is connected to a second nut (46). The first nut (45) is abutted against the lower surface of the top of the pressure cap (43). By tightening the second nut (46), the guide rod (42), the pressure cap (43) and the handle (44) are fixed together. The inner surface of the pressure cap (43) is machined with internal threads, and the outer wall of the guide sleeve (41) is machined with external threads that match the internal threads. The rotating shaft (1) has a mounting hole (15) on its side wall that communicates with the guide channel (11). The mounting hole (15) is machined with an internal thread that matches the external thread of the guide sleeve (41). The bottom end of the guide sleeve (41) is installed in the mounting hole (15).

3. The deburring tool for valve core holes as described in claim 2, characterized in that, The guide rod (42) has a limiting protrusion (47) on its bottom end face. The push rod (12) is clearance-fitted with the guide channel (11). The push rod (12) has a multi-step limiting ring groove (16) on its side wall near the push rod head (13). The top end of the guide rod (42) can extend into the guide through hole (321) so that the limiting protrusion (47) contacts the limiting ring groove (16).

4. The deburring tool for valve core holes as described in claim 1, characterized in that, The guide positioning sleeve (2) is coaxially arranged with the rotating shaft (1). The guide positioning sleeve (2) includes a cylindrical guide body (21) fitted on the rotating shaft (1). The rear end of the guide body (21) is integrally machined with a positioning plate (22) coaxially arranged with the guide body (21).

5. The deburring tool for valve core holes as described in claim 1, characterized in that, The diameter of the guide through hole (321) matches the diameter of the chamfering cutter head (331). A guide protrusion (322) is machined on the inner wall of the guide through hole (321), and a groove (335) matching the guide protrusion (322) is opened on the chamfering cutter head (331).

6. The deburring tool for valve core holes as described in claim 1, characterized in that, The chamfering cutter head (331) is a 90° double-edged chamfering cutter head.

7. The deburring tool for valve core holes as described in claim 1, characterized in that, The angle between the propulsion inclined surface (334) and the central axis of the cutter head base (332) is 115° to 120°.

8. The deburring tool for valve core holes as described in claim 1, characterized in that, The diameter of the first channel (311) is not less than the diameter of the guide channel (11).

9. The deburring tool for valve core holes as described in claim 1, characterized in that, The steel ball (34) is matched with the diameter of the first channel (311).

10. The deburring tool for valve core holes as described in claim 4, characterized in that, The positioning plate (22) is provided with bolt through holes (23).

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