Clamping tool for accurate measurement of tooth part of disc gear

Abstract

The utility model provides a clamping tool for accurate measurement of a tooth part of a disc gear, and solves the problems that an inner edge needs to be used as a positioning reference in an existing clamping mode, so that the inner edge cannot be used as a journal reference during accurate measurement of the tooth part, and a chuck tool is usually heavy and is not easy to disassemble and carry; or the problems of low measurement efficiency and low production efficiency caused by the fact that a dial indicator is manually used for rough alignment, clamping eccentricity is manually detected and then the eccentricity is eliminated in a manner of knocking correction by a rubber hammer are solved; the device specifically comprises a base, a spiral tightening device, a circular platform and a sliding block. The base is sleeved on the lower tip of the tooth measuring center, and the spiral tightener is sleeved at one end of the base and is rotationally connected with the base; three sliding rails are arranged on the circular platform in the radial direction, each sliding rail is provided with a sliding block, sliding grooves are formed in the two sides of each sliding block, and lower spiral teeth are arranged at the bottom of each sliding block. The sliding block is in sliding connection with the sliding rail through the sliding groove and is in meshed connection with upper spiral teeth arranged on the spiral tightening device through lower spiral teeth.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gear detection clamping tool, concretely relates to a disc gear tooth part precision measurement clamping tool. BACKGROUND

[0002] In the gear production and processing process, in order to ensure that gear precision and various parameters meet the standard, gear needs to be measured. Part of the shaft tooth is directly positioned and measured using the tooth measuring center center point, and for the detection of disc gear, there are two clamping modes of chuck and equal height block: the chuck tool takes the inner edge as the positioning reference, and the inner edge cannot be used as the shaft neck reference during tooth precision measurement, and the chuck tool is usually heavy and not easy to disassemble and transport. The equal height block tool needs to be manually rough aligned using a micrometer, manually detects and clamps eccentricity, and then eliminates eccentricity by using a rubber hammer to knock it, and then measures. This mode limits the measurement efficiency of disc gear, resulting in low production efficiency.

[0003] Chinese patent CN114813104A provides a clamping structure based on a gear measuring machine, comprising a mounting base, a housing, an adjustable side edge measuring frame structure, an adjustable collecting frame structure, a longitudinal cylinder, a convenient disassembly connecting frame structure, an upper side measurer, a movable frame, a telescopic cylinder, a transverse plate, a rotary motor, a convenient disassembly storage rack structure, a tool box, a transverse slide rail and a protective plate. Although the invention can measure multiple disc gears of different sizes each time, its structure is complex, and it can only measure multiple disc gears of fixed sizes, and the applicability is low. SUMMARY

[0004] The utility model aims at solving the technical problems that the existing clamping mode needs to take the inner edge as the positioning reference, which results in that the inner edge cannot be used as the shaft neck reference during tooth precision measurement, and the chuck tool is usually heavy and not easy to disassemble and transport, or manual rough alignment is needed using a micrometer, manual detection and clamping eccentricity are needed, and then eccentricity is eliminated by using a rubber hammer to knock it, resulting in low measurement efficiency and production efficiency, and provides a disc gear tooth part precision measurement clamping tool.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A disc gear tooth part precision measurement clamping tool, characterized in that it comprises a base, a screw tightener, a circular platform and a sliding block.

[0007] The circular platform is arranged at the upper end of the base, and the base and the circular platform are provided with an assembly hole penetrating upward and downward in the middle part, and the upper end of the assembly hole is used for cooperating with the lower center point of the tooth measuring center.

[0008] The lower end side wall of the base is provided with a threaded hole, a positioning fixed pin is installed in the threaded hole, and the positioning fixed pin is used for fixed connection with the workpiece table of the tooth measuring center, so that relative rotation between the base and the lower center point of the tooth measuring center is prevented.

[0009] The screwing device is circular annular structure, is sleeved on the base, is rotationally connected between the base, and is provided with upper screw teeth on the upper surface; the upper surface of the screwing device is gap-fitted with the lower surface of the circular platform;

[0010] The upper end of the circular platform is uniformly provided with at least three slides in the radial direction, each slide is provided with one sliding block, each sliding block is the same in shape and size, the lower end surface of the sliding block is provided with lower screw teeth, and the lower screw teeth are meshed with the upper screw teeth;

[0011] The inner side of each sliding block is provided with at least two clamping surfaces from inside to outside, and the outer side is provided with at least one outer supporting surface; the clamping surfaces are used to clamp the outer edges of different to-be-measured gears, and the outer supporting surface is used to support the inner edges of the to-be-measured gears; each clamping surface is an inwardly curved circular arc surface, and the upper surface of the clamping surface located on the inner side is lower than the upper surface of the clamping surface located on the outer side; the outer supporting surface is an outwardly curved circular arc surface; and the initial position of each sliding block in the slide is equal to the distance from the center of the circular platform.

[0012] Further, the size of the assembly hole meets the condition that when the base is sleeved on the lower center point of the gear measuring center through the assembly hole, the gap between the hole wall of the assembly hole and the outer surface of the lower center point of the gear measuring center is less than 0.03 mm.

[0013] Further, the outer side surface of the screwing device is engraved with an anti-skid groove to form an anti-skid surface.

[0014] Further, two screwing supporting rods are further included, at least two screwing insertion holes are uniformly arranged on the outer side surface of the screwing device in the circumferential direction, the screwing insertion holes are used for inserting the screwing supporting rods into the screwing insertion holes, and the screwing device is screwed or unscrewed.

[0015] Further, the clamping surface of the sliding block is provided with a horizontal groove to increase the friction force when the to-be-measured gear is clamped.

[0016] Further, the rotation connection part between the base and the screwing device is a necked structure to increase the stability and the radial width of the connection of the screwing device, facilitate to arrange more guide rails, increase the application range of the tool, and make the sliding of the sliding block more stable.

[0017] Further, the height of the outer supporting surface meets the following condition: the height of the outer supporting surface is not greater than half of the height of the inner edge of the to-be-measured gear, and the inner edge of the to-be-measured gear can be continuously used as the journal reference in the measurement process.

[0018] Further, the outer diameter of the screwing device is slightly larger than the outer diameter of the circular platform.

[0019] The utility model discloses the beneficial effect:

[0020] 1. The disc gear tooth part precision measurement clamping tool saves the process of eliminating eccentricity by manually detecting and clamping eccentricity and knocking with a rubber hammer, and quickly eliminates eccentricity during disc gear measurement.

[0021] 2. The disc gear tooth part precision measurement clamping tool shortens disc gear detection preparation time and improves disc gear precision measurement efficiency.

[0022] 3. The disc gear tooth part precision measurement clamping tool has strong applicability, simple operation and convenient clamping, and reduces the labor intensity of workers.

[0023] 4. The disc gear tooth part precision measurement clamping tool realizes two positioning and clamping modes of "clamping outer edge" and "expanding inner edge" by three sliding blocks, can measure various gear workpieces, including but not limited to spline shaft, disc gear and shaft gear, and has stable and reliable measurement process without risk of workpiece falling.

[0024] 5. The positioning and clamping mode of "expanding inner edge" in the disc gear tooth part precision measurement clamping tool has low occupancy rate of inner edge and does not affect the use of inner edge as a journal reference in the measurement process. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 is a partial sectional view of an embodiment of the disc gear tooth part precision measurement clamping tool of the utility model;

[0026] Fig. 2 is a top view of the embodiment of the utility model (the sliding block is not shown);

[0027] Fig. 3 is a structural schematic view of the sliding block in the embodiment of the utility model.

[0028] REFERENCE NUMERALS:

[0029] 1 - base, 11 - assembly hole, 12 - positioning fixing pin, 2 - screw tightener, 21 - upper screw tooth, 22 - tight insertion hole, 3 - circular platform, 4 - sliding block, 41 - lower screw tooth, 5 - sliding channel. DETAILED DESCRIPTION

[0030] The technical solutions of the present application will be described clearly and completely in combination with the drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0031] The disc gear tooth part precision measurement clamping tool provided by the embodiment of the present application,Figs. 1-3 As shown, it comprises a base 1, a screwing device 2, a circular platform 3 and a sliding block 4;

[0032] The circular platform 3 is arranged at the upper end of the base 1, and the base 1 and the circular platform 3 are provided with an assembly hole 11 penetrating from top to bottom in the middle part, the upper end of the assembly hole 11 is used for cooperating with the lower center of the gear measuring center, and the gap between the hole wall of the assembly hole 11 and the outer surface of the lower center of the gear measuring center is less than 0.03mm when the base 1 is sleeved on the lower center of the gear measuring center through the assembly hole 11.

[0033] The lower end side wall of the base 1 is provided with a threaded hole, and a positioning fixing pin 12 is arranged in the threaded hole, which is used for fixedly connecting with the workpiece table of the gear measuring center and preventing the base 1 from rotating relative to the lower center of the gear measuring center.

[0034] The screwing device 2 is a circular ring structure, which is rotatably connected with the base 1, and the upper surface of the screwing device 2 is provided with upper helical teeth 21 with equal pitch; the upper surface of the screwing device 2 and the lower surface of the circular platform 3 are gap-fitted, and the outer diameter of the screwing device 2 is slightly larger than the outer diameter of the circular platform 3. The outer side surface of the screwing device 2 is engraved with grooves with equal distance, similar depth and uniform spacing, forming an anti-skid surface; the outer side surface of the screwing device 2 is provided with three screwing insertion holes 22 along the circumference, when the operator cannot screw the screwing device 2 by hand, the screwing support rod can be inserted into the screwing insertion hole 22 to further tighten or loosen the screwing device 2.

[0035] The upper end of the circular platform 3 is uniformly provided with three slide rails 5 along the radial direction, and the included angle between adjacent two slide rails 5 is 120°; one sliding block 4 is arranged in each slide rail 5, and the lower end surface of the sliding block is provided with lower helical teeth 41, which are engaged with the upper helical teeth 21 to realize helical transmission, so that the three sliding blocks 4 can synchronously slide on the slide rails 5 along the radial direction of the circular platform 3.

[0036] The inner side of each sliding block 4 is provided with two clamping surfaces from inside to outside, and the outer side is provided with an outer supporting surface; the two clamping surfaces are both inwardly curved arc surfaces, the upper surface of the clamping surface located on the inner side is lower than the upper surface of the clamping surface located on the outer side, which is used for clamping the outer edge of different measured gears, and the clamping surface is provided with a horizontal groove to increase the friction force when clamping the measured gear; the outer supporting surface is an outwardly curved arc surface, which is used for supporting the inner edge of the measured gear outwardly, and the height of the outer supporting surface meets the following condition: the height of the outer supporting surface is not greater than half of the height of the inner edge of the measured gear, and the inner edge of the measured gear can be used as the reference of the shaft neck during the measurement process.

[0037] The initial position of each sliding block 4 in the slide rail is equal to the distance from the center of the circular platform 3, and when the screwing device 2 is rotated, the three sliding blocks 4 can synchronously slide on the slide rails 5 along the radial direction of the circular platform 3, which ensures that the measured gear will not be eccentric when clamped or supported inwardly.

[0038] The rotation connection between the base 1 and the screwing device 2 is a necked structure, which increases the stability and radial width of the screwing device 2, facilitates to set more guide rails, increases the application range of the tool, and makes the sliding of the sliding block more stable.

[0039] In use, the present application ensures the cleanness of the center workbench, then the base 1 is sleeved on the lower center of the gear measuring center, and is gently rotated during assembly to avoid knocking the lower center; after being installed in place, the positioning fixing pin 12 is tightened to prevent the base 1 from rotating relative to the lower center of the gear measuring center. In the next step, the sliding block 4 is pre-set to a size position corresponding to the outer diameter or inner diameter of the workpiece to be measured, the workpiece to be measured is gently placed on the sliding block 4, and the screwing device 2 is tightened for fastening. Then the measurement is started, the reference data of the shaft neck is recorded, and the calibration period of the tool precision is formulated; after the measurement is completed, the screwing device 2 is loosened to release the workpiece to be measured, the workpiece is taken down, the positioning fixing pin 12 is loosened, and the present clamping tool is rotated and taken down.

Claims

1. A fixture for precision measuring the teeth of a disc gear, characterized in that, include: The base (1), the screw tightener (2), the circular platform (3), and the slider (4) are all components of this product. The circular platform (3) is set at the upper end of the base (1). The base (1) and the circular platform (3) are provided with an assembly hole (11) that runs vertically through the middle. The upper end of the assembly hole (11) is used to cooperate with the lower center of the tooth measuring center. The lower side wall of the base (1) is provided with a threaded hole, in which a positioning and fixing pin (12) is installed for fixed connection with the workpiece table of the tooth measuring center. The screw tightener (2) is a ring-shaped structure, sleeved on the base (1) and rotatably connected to the base (1). Its upper surface is provided with upper helical teeth (21) with equal pitch. The upper surface of the screw tightener (2) and the lower surface of the circular platform (3) are in clearance fit. The upper end of the circular platform (3) is provided with at least three slides (5) evenly arranged in the radial direction. Each slide (5) is provided with a slider (4). The lower end face of the slider (4) is provided with a lower helical tooth (41), and the lower helical tooth (41) meshes with the upper helical tooth (21). Each slider (4) has at least two clamping surfaces arranged from the inside to the outside on its inner side, and at least one outer support surface arranged on its outer side; each clamping surface is an inwardly curved arc surface, and the upper surface of the clamping surface on the inner side is lower than the upper surface of the clamping surface on the outer side; the outer support surface is an outwardly curved arc surface; the initial position of each slider (4) in the slide is equal to the distance from the center of the circular platform (3).

2. The precision measuring fixture for the teeth of a disc gear according to claim 1, characterized in that: The size of the assembly hole (11) meets the condition that when the base (1) is fitted onto the lower tip of the tooth measuring center through the assembly hole (11), the gap between the wall of the assembly hole (11) and the outer surface of the lower tip of the tooth measuring center is less than 0.03mm.

3. The precision measuring fixture for the teeth of a disc gear according to claim 1, characterized in that: The outer side of the screw tightener (2) is engraved with anti-slip grooves to form an anti-slip surface.

4. The precision measuring fixture for the teeth of a disc gear according to claim 3, characterized in that: It also includes two tightening support rods. The outer side of the spiral tightener (2) is provided with at least two tightening holes (22) evenly in the circumferential direction. The tightening holes (22) are used to insert the tightening support rods into the tightening holes (22) to tighten or loosen the spiral tightener (2).

5. The precision measuring fixture for the teeth of a disc gear according to claim 1, characterized in that: The clamping surface of the slider (4) is provided with a horizontal groove to increase the friction when clamping the gear to be tested.

6. The precision measuring fixture for the teeth of a disc gear according to claim 1, characterized in that: The rotating connection between the base (1) and the screw tightener (2) is a necked structure, which is used to increase the stability and radial width of the screw tightener (2).

7. The precision measuring fixture for the teeth of a disc gear according to claim 1, characterized in that: The height of the outer support surface meets the following conditions: the height of the outer support surface is not greater than half the height of the inner edge of the gear under test, and the inner edge of the gear under test can continue to be used as the journal reference during the measurement process.

8. A precision measuring fixture for disc gear teeth according to any one of claims 1-7, characterized in that: The outer diameter of the screw tightener (2) is slightly larger than the outer diameter of the circular platform (3).

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