A single key pulling tire fixture with adjustable keyway depth

Abstract

This utility model relates to a fixture, specifically a keyway depth adjustable single-key puller fixture, which solves the technical problem that the puller pads of existing single-key puller assemblies wear out quickly, and that different thicknesses of pads are used for products with different keyway depths, making it difficult to guarantee the keyway depth. The fixture includes a front shaft and a rear shaft coaxially connected from front to back, a limiting component sleeved on the front shaft, a mounting ring sleeved on the rear shaft, a pad assembly, a positioning component, and a fixing component. The front shaft is used to set the workpiece to be processed, and the front face of the limiting component is used to limit the workpiece to be processed. The mounting ring is used to connect to the single-key puller fixture. The front shaft and the rear shaft have a communicating keyway along the axial direction for the puller to pass through. The pad assembly includes an upper pad and a lower pad, with the plane of the upper pad supporting the bottom of the puller. The positioning component is used to adjust the position of the upper pad relative to the lower pad, thereby adjusting the height of the puller.

Description

Technical Field

[0001] This utility model relates to a clamp, specifically a single-key pull clamp with adjustable keyway depth. Background Technology

[0002] Machining a single key in a disc gear requires positioning the gear's inner bore, gear ring, and end face. The machining process typically involves requirements for keyway position, width, and depth. Keyway position is determined by the single-key broaching assembly, keyway width is ensured by the width of the single-key broach's cutting edge, and keyway depth is achieved by combining the thickness of the broaching pad in the single-key broaching assembly with the height of the broach's cutting edge. Currently, the broaching pads in existing single-key broaching assemblies wear relatively quickly, and different keyway depths require different pad thicknesses. Therefore, to ensure the correct keyway depth, the broaching pads need frequent replacement.

[0003] Chinese patent CN110682125B discloses a "single-key clamp and adjustment method for tapered gears," comprising a clamp base, a gear guide, a positioning sleeve, a tapered sleeve, a cylindrical pin, a first spring, a retaining ring, and a second spring. The clamp base includes a base body and a mounting post. The gear guide is positioned at the upper end of the base body. The tapered sleeve is fitted onto the mounting post. One end of the cylindrical pin is fixedly mounted on the tapered sleeve, and the other end is fitted with the first spring and installed within an axial groove of the base body. The positioning sleeve is fitted onto the tapered sleeve and fixedly connected to the base body. The retaining ring has through holes on both sides, and the mounting post has fixing posts on both sides. The retaining ring is positioned within a circumferential groove of the mounting post, and the fixing posts are located within the through holes. A second spring is positioned between the retaining ring and the mounting post. This technical solution addresses the problems of poor positioning accuracy in existing single-key clamps, the inability to precisely adjust the angle between the teeth and keyway of tapered gears, and the long adjustment time.

[0004] Chinese patent CN222569484U discloses a "helical gear pull single-key fixture", which includes a fixture body. The fixture body uses a linear guide rail and a linear slider to provide guidance for the gear slider assembly, and is driven by a transmission screw. The fixture body fixes the helical gear through a single-key pull shaft in the mounting hole. This technical solution is used to solve the problem that the existing fixture fixing structure is prone to loosening due to the vibration generated by the machine tool during use, which causes the positioning component used for gear positioning to shift left and right, affecting the gear machining accuracy.

[0005] The aforementioned gear-driven single-key clamp is mainly designed to address the issues of poor clamp positioning accuracy and poor clamp fixing effect. However, it cannot solve the technical problem of rapid wear of the single-key tire-pulling component's tire-pulling blade pad, which leads to frequent replacements. Utility Model Content

[0006] The purpose of this invention is to solve the technical problem that the existing single-key tire pulling assembly has a tire pulling blade pad that wears out quickly, and that different thickness blade pads are used for products with different keyway depths, making it difficult to guarantee the keyway depth. The invention provides a single-key tire pulling clamp with adjustable keyway depth.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A keyway depth adjustable single-key puller clamp is characterized in that it includes a front shaft and a rear shaft coaxially connected from front to back, a limiting component sleeved on the front shaft, a mounting ring sleeved on the rear shaft, as well as a blade pad component, a positioning component, and a fixing component.

[0009] The front end shaft is used to set the workpiece to be processed, and the front end face of the limiting component is used to limit the workpiece to be processed; the mounting ring is used to connect with the pull-key fixture.

[0010] The front and rear shafts are provided with a connecting keyway along the axial direction, and the keyway is used for the passage of the broach;

[0011] The tool pad assembly is located at the bottom of the keyway and includes an upper tool pad and a lower tool pad. Both the upper and lower tool pads are wedge-shaped structures. The plane of the lower tool pad is adapted to and fixed to the bottom of the keyway. The inclined surfaces of the upper and lower tool pads have the same inclination and are in contact with each other, so that the plane of the upper tool pad is parallel to the plane of the lower tool pad. The plane of the upper tool pad is used to support the bottom of the broach.

[0012] Positioning components are respectively set at both ends of the upper blade pad to adjust the position of the upper blade pad relative to the lower blade pad, thereby adjusting the height of the pull cutter;

[0013] The fixing components are located at the front end of the front axis and the rear end of the rear axis, and are fixedly connected to the positioning component, the front end of the front axis, and the rear end of the rear axis, respectively.

[0014] Furthermore, the diameter of the front shaft is smaller than that of the rear shaft; the limiting component is connected to the front end of the front shaft.

[0015] Furthermore, the two ends of the upper blade pad are set as inclined surfaces with the upper end sloping inward; the positioning component includes a first pressure block and a second pressure block; the first pressure block and the second pressure block are both right-angled trapezoidal structures, and their inclined surfaces are respectively adapted to the inclined surfaces at both ends of the upper blade pad and respectively abut against each other.

[0016] Furthermore, the fixing component includes a first mounting block, a second mounting block, and a plurality of connectors; the first mounting block is connected to the front end of the front shaft and the first pressure block respectively via connectors; the second mounting block is connected to the rear end of the rear shaft and the second pressure block respectively via connectors.

[0017] Furthermore, the first mounting block is a cuboid structure, with one end connected to the front end of the front shaft via a connector, and its inner sidewall abutting against the front end of the lower blade pad; the connector passes through the other end of the first mounting block and connects to the first pressure block, so that the first pressure block abuts against the front end of the upper blade pad, and there is an adjustment space between the other end of the first mounting block and the first pressure block.

[0018] Furthermore, the second mounting block has a Z-shaped structure, with one end connected to the rear end of the rear shaft via a connector and abutting against the rear end of the lower blade pad; the connector passes through the other end of the second mounting block and connects to the second pressure block, so that the second pressure block abuts against the rear end of the upper blade pad, and there is an adjustment space between the other end of the second mounting block and the second pressure block.

[0019] Furthermore, the limiting component is connected to the front end of the rear shaft via a connector, and the limiting component and the front shaft are in clearance fit; the workpiece to be processed and the front shaft are in tight fit.

[0020] Furthermore, the slope of the lower blade pad gradually increases from front to back; the slope of the upper blade pad gradually decreases from front to back.

[0021] Furthermore, the limiting component adopts an annular tire pad.

[0022] Furthermore, the slope ratio of the upper and lower cutter pads is 1:25.

[0023] The beneficial effects of this utility model are:

[0024] 1. The present invention relates to a tire pulling clamp, which uses an upper and lower blade pad with an angle to stack, so as to achieve an adjustable keyway depth.

[0025] 2. The present invention provides a puller clamping fixture. When the puller passes through the keyway, it utilizes the upper and lower tool pads at the bottom of the groove for support and the groove edge for guidance, thereby realizing the single key machining of the inner hole of the clamped workpiece.

[0026] 3. This utility model of a tire-pulling fixture allows for adjustment of the relative positions of the upper and lower tool pads to meet different height and keyway depth requirements, thereby ensuring the keyway depth of the workpiece to be processed, which is convenient and quick.

[0027] 4. This utility model of tire pulling clamp uses annular tire pulling pads for axial positioning, which can process workpieces of different thicknesses and has high positional accuracy.

[0028] 5. This utility model of tire clamping fixture can reduce the investment of tool pads, improve adjustment efficiency, and facilitate quick and easy keyway machining. Attached Figure Description

[0029] Figure 1 This is a cross-sectional view of an embodiment of the adjustable keyway depth single-key puller jig of this utility model;

[0030] Figure 2 This is a three-dimensional structural cross-sectional view of an embodiment of the adjustable keyway depth single-key puller jig of this utility model;

[0031] Figure 3 This is a schematic diagram of the front shaft, rear shaft, and mounting ring in an embodiment of the adjustable keyway depth puller jig of this utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] 11-Front end shaft, 12-Keyway, 13-Rear end shaft, 14-Mounting ring, 2-Limiting component, 3-Upper tool pad, 4-Lower tool pad, 5-First pressure block, 6-First mounting block, 7-Second mounting block, 8-Second pressure block, 9-Broach, 10-Workpiece to be processed. Detailed Implementation

[0034] like Figure 1 , Figure 2 , Figure 3 As shown, a keyway depth adjustable single-key puller fixture includes a front shaft 11 and a rear shaft 13 coaxially connected from front to back, a limiting component 2 sleeved on the front shaft 11, a mounting ring 14 sleeved on the rear shaft 13, a tool pad assembly, a positioning assembly, and a fixing assembly. The front shaft 11 is used to set the workpiece 10 to be processed, and the front end face of the limiting component 2 is used to limit the workpiece 10 to be processed. The diameter of the front shaft 11 is smaller than the diameter of the rear shaft 13. The front shaft 11 and the rear shaft 13 are provided with a communicating keyway 12 along the axial direction, and the keyway 12 is used for the broach 9 to pass through. The mounting ring 14 is used to connect with the single-key puller fixture, and the single-key puller fixture is connected and fixed to the machine tool.

[0035] To prevent the workpiece 10 from moving axially backward when the broach 9 is shaping from front to back, a limiting component 2 is provided. The limiting component 2 adopts an annular puller pad. The annular puller pad is connected to the front end of the rear shaft 13 through a connector, and there is a clearance fit between the annular puller pad and the front shaft 11. There is a tight fit between the workpiece 10 and the front shaft 11.

[0036] The cutter pad assembly is located at the bottom of the keyway 12 and includes an upper cutter pad 3 and a lower cutter pad 4. Both the upper cutter pad 3 and the lower cutter pad 4 are wedge-shaped structures. The two ends of the upper cutter pad 3 are set as inclined surfaces with the upper end sloping inward, and the two ends of the lower cutter pad 4 are set as inclined surfaces with the upper end sloping outward. The plane of the lower cutter pad 4 is adapted to and fixed to the bottom of the keyway 12. The inclined surfaces of the upper cutter pad 3 and the lower cutter pad 4 have the same inclination and are in close contact, so that the plane of the upper cutter pad 3 is parallel to the plane of the lower cutter pad 4. The plane of the upper cutter pad 3 is used to support the bottom of the broach 9. The inclination of the lower cutter pad 4 gradually increases from front to back. The inclination of the upper cutter pad 3 gradually decreases from front to back.

[0037] Positioning components are respectively set at both ends of the upper blade pad 3 to adjust the position of the upper blade pad relative to the lower blade pad 4, thereby adjusting the height of the pull blade 9; the positioning components include a first pressure block 5 and a second pressure block 8; the first pressure block 5 and the second pressure block 8 are both right-angled trapezoidal structures, and their inclined surfaces are adapted to the inclined surfaces at both ends of the upper blade pad 3 and the lower blade pad 4, and respectively abut against each other.

[0038] The fixing assembly is located at the front end of the front end shaft 11 and the rear end of the rear end shaft 13, and is fixedly connected to the positioning assembly, the front end of the front end shaft 11, and the rear end of the rear end shaft 13, respectively. The fixing assembly includes a first mounting block 6, a second mounting block 7, and multiple connecting parts; the front end of the front end shaft 11, the rear end of the rear end shaft 13, the first pressure block 5, and the second pressure block 8 are respectively provided with multiple mounting holes along the axial direction; the first mounting block 6 is connected to the front end of the front end shaft 11 and the first pressure block 5 through connecting parts and mounting holes, respectively, and fixes the front ends of the upper blade pad 3 and the lower blade pad 4; the second mounting block 7 is connected to the rear end of the rear end shaft 13 and the second pressure block 8 through connecting parts and mounting holes, respectively, and fixes the rear ends of the upper blade pad 3 and the lower blade pad 4.

[0039] Preferably, the first mounting block 6 has a cuboid structure, one end of which is connected to the front end of the front shaft 11 via a connector and a mounting hole, and its inner sidewall abuts against the front end of the lower blade pad 4; the other end is connected to the first pressure block 5 via a connector and a mounting hole, so that the first pressure block 5 abuts against the front end of the upper blade pad 3, and an adjustment space is left between the other end of the first mounting block 6 and the first pressure block 5. The second mounting block 7 has a Z-shaped structure, one end of which is connected to the rear end of the rear shaft 13 via a connector and a mounting hole, and abuts against the rear end of the lower blade pad 4; the other end is connected to the second pressure block 8 via a connector and a mounting hole, so that the second pressure block 8 abuts against the rear end of the upper blade pad 3, and an adjustment space is left between the other end of the second mounting block 7 and the second pressure block 8.

[0040] The usage process of the adjustable keyway depth single-key tire clamp based on the above-mentioned utility model is as follows:

[0041] 1. Connect the mounting ring 14 on the rear shaft 13 to the pull key fixture using bolts, and then connect the pull key fixture to the machine tool;

[0042] 2】Use bolts to connect the annular puller pad to the end of the front shaft 11, and put the workpiece 10 to be processed on the front shaft 11 so that the rear end face of the workpiece 10 to be processed is close to the front end face of the annular puller pad to ensure the axial dimension; then use the pressure head of the puller key fixture to press the workpiece 10 to be processed to ensure circumferential positioning.

[0043] 3. Use bolts to connect the lower cutter pad 4 to the bottom of the keyway 12, and make the inclined surface of the upper cutter pad 3 fit against the inclined surface of the lower cutter pad 4;

[0044] 4. Fit the inclined surfaces of the first pressure block 5 and the second pressure block 8 with the inclined surfaces of the upper blade pad 3 and the lower blade pad 4, respectively; then use bolts to connect the first mounting block 6 to the first pressure block 5 and the second mounting block 7 to the second pressure block 8.

[0045] 5. The broach 9 passes through the keyway 12. If the keyway 12 is shallow, the bolt on the second mounting block 7 is used to prevent the second pressure block 8 from touching the rear inclined surface of the upper tool pad 3. The bolt on the first mounting block 6 is adjusted to push the first pressure block 5 backward. The first pressure block 5 pushes the upper tool pad 3 backward to achieve height adjustment and ensure the depth requirement of the keyway 12. After the upper tool pad 3 is raised along the inclined surface of the lower tool pad 4, the bolt on the second mounting block 7 is adjusted to press the rear inclined surface of the upper tool pad 3 with the second pressure block 8. The broach 9 is used to repeatedly move in a straight line from front to back (i.e., along the front end shaft 11 to the rear end shaft 13) to perform single keyway machining on the workpiece 10.

[0046] This utility model provides an adjustable keyway depth single-key puller fixture. The distance between the upper cutter pad 3 and the lower cutter pad 4 is adjusted appropriately according to the slope ratio of their inclined surfaces to ensure the required depth of the keyway 12. In this embodiment, the slope ratio of the upper cutter pad 3 and the lower cutter pad 4 is 1:25. Moving the upper cutter pad 3 backward by 5mm increases its height by 0.2mm. If the keyway 12 is deeper, the adjustment is made in the opposite direction.

Claims

1. A keyway depth adjustable single key tire pull fixture, characterized in that: It includes a front shaft (11) and a rear shaft (13) coaxially connected from front to back, a limiting component (2) sleeved on the front shaft (11), a mounting ring (14) sleeved on the rear shaft (13), a blade pad assembly, a positioning assembly, and a fixing assembly; The front end shaft (11) is used to set the workpiece (10) to be processed, and the front end face of the limiting component (2) is used to limit the workpiece (10) to be processed; the mounting ring (14) is used to connect with the single-key clamp; The front end shaft (11) and the rear end shaft (13) are provided with a keyway (12) that communicates with each other along the axial direction. The keyway (12) is used for the broach (9) to pass through. The cutter pad assembly is disposed at the bottom of the keyway (12), and includes an upper cutter pad (3) and a lower cutter pad (4); both the upper cutter pad (3) and the lower cutter pad (4) are wedge-shaped structures; the plane of the lower cutter pad (4) is adapted to and fixedly connected to the bottom of the keyway (12); the inclined surface of the upper cutter pad (3) and the inclined surface of the lower cutter pad (4) have the same inclination, and the two are in contact, so that the plane of the upper cutter pad (3) is parallel to the plane of the lower cutter pad (4), and the plane of the upper cutter pad (3) is used to support the bottom of the broach (9); The positioning components are respectively disposed at both ends of the upper blade pad (3) to adjust the position of the upper blade pad (3) relative to the lower blade pad (4), thereby adjusting the height of the pull cutter (9); The fixing component is located at the front end of the front end shaft (11) and the rear end of the rear end shaft (13), and is fixedly connected to the positioning component, the front end of the front end shaft (11), and the rear end of the rear end shaft (13), respectively.

2. The adjustable keyway depth single-key pull jig according to claim 1, characterized in that: The diameter of the front end shaft (11) is smaller than the diameter of the rear end shaft (13); The limiting component (2) is connected to the front end of the front shaft (11).

3. The adjustable keyway depth single-key pull jig according to claim 2, characterized in that: The two ends of the upper blade pad (3) are configured as inclined surfaces with the upper end sloping inward; The positioning component includes a first pressing block (5) and a second pressing block (8); The first pressure block (5) and the second pressure block (8) are both right-angled trapezoidal structures, and their inclined surfaces are adapted to the inclined surfaces at both ends of the upper knife pad (3) and respectively abut against each other.

4. The adjustable keyway depth single-key pull jig according to claim 3, characterized in that: The fixing assembly includes a first mounting block (6), a second mounting block (7), and multiple connectors; The first mounting block (6) is connected to the front end of the front shaft (11) and the first pressure block (5) respectively through a connector; The second mounting block (7) is connected to the rear end of the rear shaft (13) and the second pressure block (8) via connectors.

5. The adjustable keyway depth single-key pull jig according to claim 4, characterized in that: The first mounting block (6) is a cuboid structure. One end of it is connected to the front end of the front shaft (11) through a connector, and its inner sidewall abuts against the front end of the lower blade pad (4). The connector passes through the other end of the first mounting block (6) and connects to the first pressure block (5), so that the first pressure block (5) abuts against the front end of the upper blade pad (3), and there is an adjustment space between the other end of the first mounting block (6) and the first pressure block (5).

6. The adjustable keyway depth single-key pull jig according to claim 5, characterized in that: The second mounting block (7) has a Z-shaped structure. One end of it is connected to the rear end of the rear shaft (13) through a connector and abuts against the rear end of the lower blade pad (4). The other end of the connector passes through the second mounting block (7) and is connected to the second pressure block (8), so that the second pressure block (8) abuts against the rear end of the upper blade pad (3), and there is an adjustment space between the other end of the second mounting block (7) and the second pressure block (8).

7. The adjustable keyway depth single-key pull jig according to claim 6, characterized in that: The limiting component (2) is connected to the front end of the rear shaft (13) through a connector, and the limiting component (2) and the front shaft (11) are in clearance fit; the workpiece (10) to be processed and the front shaft (11) are in tight fit.

8. The adjustable keyway depth single-key pull jig according to claim 7, characterized in that: The slope of the lower blade pad (4) gradually increases from front to back; The slope of the upper blade pad (3) gradually decreases from front to back.

9. The adjustable keyway depth single-key pull jig according to claim 8, characterized in that: The limiting component (2) adopts an annular tire pad.

10. The adjustable keyway depth single-key pull jig according to claim 1, characterized in that: The slope ratio of the upper blade pad (3) and the lower blade pad (4) is 1:25.

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