Star wheel hub drill jig tool

Abstract

The utility model relates to a tool clamp, in particular to a drilling jig tool for a star wheel hub. Comprising a base, a core shaft and a cover plate, the core shaft comprises a fixed section, a shaft body section and a threaded section, the fixed section and the threaded section are arranged at the two ends of the shaft body section respectively, the fixed section is fixedly connected with the base, a fixed pin is fixedly arranged on the shaft body section, the fixed pin is arranged in the axial direction of the shaft body section, and the threaded section is fixedly connected with the base. A through hole allowing the shaft body section and the fixing pin to penetrate through is formed in the center of the cover plate, a plurality of drill bit passing holes are formed in the plate face of the cover plate, the cover plate is arranged on the shaft body section in a sleeving mode through the through hole, and the threaded section is in threaded connection with a locking nut to press and fix the cover plate. And a getter groove is formed in the shaft body section at the joint of the shaft body section and the fixing pin. The drilling jig tool for the star wheel hub has the advantages that a workpiece can be conveniently mounted and dismounted, and the production efficiency and the product quality can be improved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical processing, specifically to a star wheel hub drilling jig tooling Background Art

[0002] The star wheel hub is an important component in the transmission assembly. Two holes of different sizes need to be drilled on it to meet different needs of installation and matching. In the prior art, the two holes of different sizes need to be processed in batches, which not only requires repeated positioning, increases the defective rate, but also reduces production efficiency.

[0003] Moreover, the brick mold tooling in the prior art has burrs on the key groove after punching the center hole of the star wheel hub, which will cause interference when the workpiece is installed on the drilling and grinding tooling, resulting in unsmooth installation and reduced production efficiency. The interference will also lead to inaccurate installation and affect the quality of the finished product after subsequent drilling. Utility Model Content

[0004] The utility model aims to provide a star wheel hub drilling jig tooling which is convenient for workpiece installation and disassembly and can improve production efficiency and product quality.

[0005] A star wheel hub drilling jig tooling in the present scheme includes a base, a core shaft and a cover plate, the core shaft includes a fixed section, a shaft section and a threaded section, the fixed section and the threaded section are respectively arranged at two ends of the shaft section, the fixed section is fixedly connected to the base, a fixing pin is fixedly provided on the shaft section, and the fixing pin is axially arranged along the shaft section, a through hole is opened in the center of the cover plate for allowing the shaft section and the fixing pin to pass through, a plurality of drill bit passing holes are opened on the surface of the cover plate, the cover plate is sleeved on the shaft section through the through hole, the threaded section is threadedly connected with a locking nut to press and fix the cover plate, and an air release groove is opened on the shaft section at the connection between the shaft section and the fixing pin.

[0006] The center hole of the workpiece is sleeved on the shaft section of the mandrel, and the rest of the workpiece is supported and limited by the base. The cover plate is sleeved on the mandrel and the end threaded section is fixed and pressed against the workpiece by a locking nut. The several drill holes on the cover plate are the positions where holes need to be drilled on the workpiece, and accurate processing positioning can be performed through the cover plate. The fixing pin plays a role in preventing the mandrel from rotating, and the degassing groove on the shaft section is used to avoid the burrs of the workpiece pulled out by the key groove, making the installation smooth.

[0007] Furthermore, a gasket is provided between the cover plate and the locking nut.

[0008] Further, the drill bit through hole includes 3 installation through holes and 3 matching through holes, the 3 installation through holes are arranged on the same circumference at equal angles near the center of the cover plate, the 3 matching through holes are arranged on the same circumference at equal angles near the edge of the cover plate, and the 3 installation through holes and the 3 matching through holes are arranged in a staggered manner. The installation through holes and the matching through holes are arranged according to the actual processing positions on the workpiece.

[0009] Furthermore, the base has a stepped groove structure, the bottom of the stepped groove is a connecting groove, the groove shoulder is a limiting groove, and the groove top is a supporting platform.

[0010] Furthermore, the washer is a U-shaped washer with one end open, which is convenient for installation on the mandrel and also easy for disassembly.

[0011] Furthermore, the fixing section is interference fit with the connecting groove.

[0012] Furthermore, there is a gap between the shaft body segment and the limiting groove, and the gap is used to fix the central axis hole wall structure of the workpiece and assist in limiting in the radial direction.

[0013] Furthermore, the cover plate can cover the support platform at the top of the groove. The outer diameter of the support platform just fits the inner diameter of the outer cylindrical boss of the workpiece, playing a role of support and auxiliary positioning.

[0014] Furthermore, air relieving grooves are provided on the shaft body section at the connection points between the shaft body section and the fixing pin on both sides, and the air relieving grooves are arranged axially from top to bottom along the shaft body section.

[0015] The advantages of the utility model are that the workpiece can be easily installed on the core shaft and fixed to the base by a cover plate, a gasket and a locking nut. The overall structure of the tooling is compact and the design is reasonable. The central shaft hole, the shaft hole wall and the outer ring boss of the star wheel hub workpiece are supported, limited and positioned. The drilling process of the workpiece wheel surface can be completed at one time, thereby improving production efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of the star wheel hub drilling jig tooling of the utility model;

[0017] Figure 2 This is the front view of the central shaft of the utility model;

[0018] Figure 3 It is a top view of the core shaft of the utility model;

[0019] Figure 4 for Figure 3 The enlarged view of point I in the middle;

[0020] Figure 5This is a schematic diagram of the structure of the cover plate in the utility model;

[0021] Figure 6 It is a structural schematic diagram of the gasket in the utility model; DETAILED DESCRIPTION

[0022] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0023] according to Figures 1 to 6 As shown, a star wheel hub drilling jig tool in the present solution includes a base 100, a core shaft 200, a cover plate 300, a gasket 400 and a locking nut 500. Among them, the core shaft 200 includes a fixed section 201, a shaft section 202 and a threaded section 203, and the fixed section 201 and the threaded section 203 are respectively arranged at both ends of the shaft section 202, and the fixed section 201 is fixedly connected to the base 100, and the fixed section 201, the shaft section 202 and the threaded section 203 are an integrally formed structure. A fixing pin 204 is embedded and welded on the shaft section 202, and the fixing pin 204 is arranged axially along the shaft section 202. For details, see Figure 4 The shaft body section 202 is provided with degassing grooves 206 at the connection seams on both sides of the shaft body section 202 and the fixing pin 204, and the degassing grooves 206 are arranged along the axial direction of the shaft body section 202 from top to bottom.

[0024] The center hole of the workpiece 1 is sleeved on the shaft section of the core shaft 200, and the rest of the workpiece 1 is supported and limited by the base 100. The cover plate 300 is sleeved on the core shaft 200 and the end threaded section is fixed and pressed against the workpiece 1 by the locking nut 500. The fixing pin 204 serves to prevent the core shaft from rotating. The air relieving groove 206 on the shaft section 202 is used to avoid the burrs of the workpiece 1 pulled out by the key groove, so that the installation is smooth.

[0025] See Figure 5 A through hole is provided in the center of the cover plate 300 for the shaft section 202 and the fixing pin 204 to pass through, and a plurality of drill holes 205 are provided on the surface of the cover plate 300. The plurality of drill holes 205 on the cover plate 300 are the positions where holes need to be drilled on the workpiece 1, and accurate processing positioning can be performed through the cover plate 300.

[0026] See Figure 5 In this embodiment, the drill through hole 205 includes three installation through holes 215 and three matching through holes 225, wherein the three installation through holes 215 are arranged on the same circumference at equal angles of 120° near the center of the cover plate 300. The three matching through holes 225 are arranged on the same circumference at equal angles of 120° near the edge of the cover plate 300, and the three installation through holes 215 and the three matching through holes 225 are arranged in an alternating manner. The installation through holes 215 and the matching through holes 225 are arranged according to the actual processing positions on the workpiece 1.

[0027] See Figure 1 The cover plate 300 is sleeved on the shaft body section 202 through the through hole, and the threaded section 203 is threadedly connected with a locking nut 500 to press and fix the cover plate 300. A washer 400 is arranged between the cover plate 300 and the locking nut 500. In this embodiment, the washer 400 is a U-shaped washer with one end open. The U-shaped washer is easy to install on the core shaft and is also easy to disassemble.

[0028] See Figure 1 The base 100 has a stepped groove 101 structure. The bottom of the stepped groove 101 is a connecting groove 111, the groove shoulder is a limiting groove 121, and the groove top is a support platform 131. The fixing section 201 is interference fit with the connecting groove 111. There is a gap between the shaft section 202 and the limiting groove 121, and the gap is used to fix the central axis hole wall structure of the workpiece 1 and assist in radial limiting. The cover plate 300 can cover the support platform 131 at the top of the groove. The outer diameter of the support platform 131 just clamps the inner diameter of the outer cylindrical boss of the workpiece 1, which plays a role in supporting and assisting positioning.

[0029] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. A planetary wheel hub drilling jig tool, characterized in that: The invention comprises a base (100), a core shaft (200) and a cover plate (300), wherein the core shaft (200) comprises a fixed section (201), a shaft section (202) and a threaded section (203), wherein the fixed section (201) and the threaded section (203) are respectively arranged at two ends of the shaft section (202), the fixed section (201) is fixedly connected to the base (100), the shaft section (202) is fixedly provided with a fixing pin (204), and the fixing pin (204) is axially arranged along the shaft section (202), and the cover plate (300) is provided with a fixing pin (204). A through hole is provided at the center of the plate (300) for the shaft section (202) and the fixing pin (204) to pass through, a plurality of drill holes (205) are provided on the surface of the cover plate (300), the cover plate (300) is sleeved on the shaft section (202) through the through hole, the threaded section (203) is threadedly connected with a locking nut (500) to press and fix the cover plate (300), and a degassing groove (206) is provided on the shaft section (202) at the connection between the shaft section (202) and the fixing pin (204).

2. The planetary wheel hub drilling jig tooling according to claim 1, characterized in that: A washer (400) is provided between the cover plate (300) and the locking nut (500).

3. The planetary wheel hub drilling jig tooling according to claim 1 or 2, characterized in that: The drill bit through hole (205) comprises three installation through holes (215) and three matching through holes (225); the three installation through holes (215) are arranged on the same circumference at equal angles near the center of the cover plate (300); the three matching through holes (225) are arranged on the same circumference at equal angles near the edge of the cover plate (300); and the three installation through holes (215) and the three matching through holes (225) are arranged in a staggered manner.

4. The planetary wheel hub drilling jig tooling according to claim 1 or 2, characterized in that: The base (100) has a stepped groove (101) structure in its interior, wherein the groove bottom of the stepped groove (101) is a connecting groove (111), the groove shoulder is a limiting groove (121), and the groove top is a supporting platform (131).

5. The planetary wheel hub drilling jig tooling according to claim 2, characterized in that: The gasket (400) is a U-shaped gasket with one end open.

6. The planetary wheel hub drilling jig tooling according to claim 4, characterized in that: The fixing section (201) and the connecting groove (111) are interference fit.

7. The planetary wheel hub drilling jig tooling according to claim 4, characterized in that: There is a gap between the shaft body section (202) and the limiting groove (121).

8. The planetary wheel hub drilling jig tooling according to claim 4, characterized in that: The cover plate (300) can cover the support platform (131) at the top of the trough.

9. The planetary wheel hub drilling jig tooling according to claim 4, characterized in that: The shaft section (202) is provided with air relieving grooves (206) at the connection points between the shaft section (202) and the fixing pin (204) on both sides. The air relieving grooves (206) are arranged axially from top to bottom along the shaft section (202).

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