Simple gear shaving clamp
By designing a combination structure of simple shaving fixtures, the problems of poor versatility and high cost of fixtures in small module and small inner hole gear processing are solved, and the accuracy, efficiency and cost reduction of tooth shape processing are improved.
Patent Information
- Application Number
- CN202421028931.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-13
AI Technical Summary
The existing small module small inner hole cylindrical gear has poor versatility during the shaving process, and the production cycle is long and the cost is high, making it difficult to meet the demand for rapid production.
A simple tooth shaving fixture was designed, using a combined structure of positioning sleeve, centering mandrel and compression sleeve. Through the coordination of threaded through holes and blind holes and the design of step holes, the split assembly and anti-slip functions of the fixture are realized. , reduces production complexity and cost.
It realizes the convenient shaving and loading and unloading of small modules and small inner hole gear parts, improves the accuracy and efficiency of tooth shape processing, and greatly reduces the import procurement cost of fixtures.
Smart Images
Figure CN222307591U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of clamps, in particular to a simple gear shaving clamp. Background Art
[0002] The fixture has always been a difficult point in the process of shaving and honing of cylindrical gears with small module and small inner hole (inner hole φ5≤φD≤12). The processing of this kind of gear basically relies on the positioning of the inner hole end face. Due to the limitations of the working principle of the gear shaving equipment, this kind of fixture can only be made into an oil film expansion structure. However, this structure has poor versatility and is a special fixture that has to be imported and purchased, with a long production cycle and very high cost.
[0003] With the increase in the variety of similar small inner hole products, a simple shaving fixture must be designed and manufactured to meet production needs. Utility Model Content
[0004] The utility model aims to provide a simple gear shaving fixture, which is convenient for loading and unloading when shaving small-module and small-inner-hole gear parts, and can also ensure the tooth shape processing accuracy and efficiency improvement, while greatly reducing the import procurement cost of the fixture, so as to solve the problems raised in the above-mentioned background technology.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A simple gear shaving fixture comprises a coaxially arranged positioning sleeve, a centering mandrel and a pressing sleeve; the centering mandrel is connected to the center of the positioning sleeve, the left and right ends of the centering mandrel extend to the outside of the two ends of the positioning sleeve, and the left end face of the positioning sleeve is perpendicular to the axial center line of the centering mandrel; the pressing sleeve is connected to the outside of one end of the centering mandrel, the left end of the centering mandrel is inserted into the shaft hole of the gear, the left and right ends of the gear are respectively fitted with the end faces of the pressing sleeve and the positioning sleeve, and the right end face of the pressing sleeve is perpendicular to the axial center line of the centering mandrel; a left center hole is provided at the center of the left end of the pressing sleeve, and a right center hole is provided at the center of the right end of the centering mandrel.
[0007] A further improvement of the utility model is that an inner hole is provided at the axial center of the positioning sleeve, and the centering core shaft is gap-fitted with the inner hole; two threaded through holes are provided on the positioning sleeve, and two threaded blind holes are provided on the outer wall of the centering core shaft, and two locking screws are threadedly fitted with the threaded through holes and the threaded blind holes to fix the positioning sleeve and the centering core shaft into one.
[0008] A further improvement of the utility model is that a step hole is provided at the axial center of the compression sleeve, the core shaft is clearance-matched with the small-diameter section of the step hole, and the hub of the gear is accommodated in the large-diameter section of the step hole.
[0009] A further improvement of the utility model is that the outer diameters of the positioning sleeve and the pressing sleeve are smaller than the root circle diameter of the gear.
[0010] A further improvement of the utility model is that the outer diameter of the positioning sleeve and the pressing sleeve is 0.5-1 mm smaller than the root circle diameter of the gear.
[0011] A further improvement of the utility model is that the outer circumferential surfaces of the positioning sleeve and the pressing sleeve are step surfaces, and the small diameter section of the outer circumferential surface is knurled.
[0012] A further improvement of the utility model is that both the left center hole and the right center hole are tapered holes.
[0013] Beneficial effects of the utility model:
[0014] The simple gear shaving fixture of the utility model is convenient for loading and unloading when shaving small-module small-inner-hole gear parts, and can also ensure the tooth profile processing accuracy and efficiency improvement, while greatly reducing the import purchase cost of the fixture.
[0015] In the simple gear shaving fixture of the utility model, if the centering mandrel and the positioning sleeve adopt an integrated structure, during the manufacturing process of the fixture, when grinding the left end face of the positioning sleeve, the tool is easy to hit the root of the centering mandrel, and the centering mandrel is easy to break due to excessive force. Therefore, the centering mandrel and the positioning sleeve adopt a separate assembly structure, which can effectively avoid the problem of broken shaft.
[0016] The utility model discloses a simple gear shaving fixture, wherein the outer circumferential surfaces of the positioning sleeve and the pressing sleeve are knurled, so as to prevent slipping and facilitate the disassembly and assembly of the workpiece by the operators. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0018] Figure 2 It is a schematic diagram of the positioning sleeve structure of the utility model.
[0019] Figure 3 It is a schematic diagram of the centering mandrel structure of the utility model.
[0020] Figure 4 This is a schematic diagram of the structure of the clamping sleeve of the utility model.
[0021] In the figure: 1-positioning sleeve, 101-inner hole, 102-threaded through hole, 2-centering mandrel, 201-right center hole, 202-threaded blind hole, 3-pressing sleeve, 301-left center hole, 302-step hole, 4-gear, 5-locking screw, 6-left top, 7-right top. DETAILED DESCRIPTION
[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0023] Example 1: Figures 1 to 4 As shown, a simple gear shaving fixture includes a coaxially arranged positioning sleeve 1, a centering core shaft 2 and a clamping sleeve 3; the centering core shaft 2 is connected to the center of the positioning sleeve 1, and the left and right ends of the centering core shaft 2 extend to the outside of the two ends of the positioning sleeve 1, and the left end face of the positioning sleeve 1 is perpendicular to the axial center line of the centering core shaft 2; the clamping sleeve 3 is connected to the outside of one end of the centering core shaft 2, and the left end of the centering core shaft 2 is inserted into the axial hole of the gear 4, and the left and right ends of the gear 4 are respectively fitted with the end faces of the clamping sleeve 3 and the positioning sleeve 1, and the right end face of the clamping sleeve 3 is perpendicular to the axial center line of the centering core shaft 2; a left center hole 301 is provided at the center of the left end of the clamping sleeve 3, and a right center hole 201 is provided at the center of the right end of the centering core shaft 2.
[0024] Among them, an inner hole 101 is provided at the axial center of the positioning sleeve 1, and the centering core shaft 2 is loosely fitted in the inner hole 101; two threaded through holes 102 are provided on the positioning sleeve 1, and two threaded blind holes 202 are provided on the outer wall of the centering core shaft 2, and two locking screws 5 are threadedly fitted in the threaded through holes 102 and the threaded blind holes 202 to fix the positioning sleeve 1 and the centering core shaft 2 into one.
[0025] A stepped hole 302 is provided at the axial center of the compression sleeve 3 , the core shaft is clearance-fitted in the small-diameter section of the stepped hole 302 , and the hub of the gear 4 is accommodated in the large-diameter section of the stepped hole 302 .
[0026] The outer diameters of the positioning sleeve 1 and the pressing sleeve 3 are smaller than the root circle diameter of the gear 4 .
[0027] The outer diameters of the positioning sleeve 1 and the pressing sleeve 3 are smaller than the root diameter of the gear 4 by 0.5 to 1 mm.
[0028] The outer circumferential surfaces of the positioning sleeve 1 and the pressing sleeve 3 are step surfaces, and the small diameter section of the outer circumferential surface is knurled.
[0029] Wherein, the left center hole 301 and the right center hole 201 are both tapered holes.
[0030] The specific working principle of the utility model is as follows:
[0031] During work, the operator puts the gear 4 on the left end of the centering core shaft 2 through the axial hole at the center, and slides the gear 4 until the right end face of the gear 4 fits with the left end face of the positioning sleeve 1; the clamping sleeve 3 is put on the left end of the centering core shaft 2 through the step hole 302 until the right end face of the clamping sleeve 3 fits with the left end face of the gear 4; the left center point 6 on the machine tool cooperates with the left center hole 301, and the right center point 7 on the machine tool cooperates with the right center hole 201. At this time, the clamping of the gear 4 is completed, and the gear shaving operation can be carried out.
[0032] The above implementation is only to illustrate the technical concept and features of the utility model, and its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and it cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. A simple gear shaving fixture, characterized in that: The invention comprises a coaxially arranged positioning sleeve (1), a centering spindle (2) and a pressing sleeve (3); the centering spindle (2) is connected to the center of the positioning sleeve (1), the left and right ends of the centering spindle (2) extend to the outside of the two ends of the positioning sleeve (1), and the left end face of the positioning sleeve (1) is perpendicular to the axial center line of the centering spindle (2); the pressing sleeve (3) is connected to the outside of one end of the centering spindle (2), the left end of the centering spindle (2) is inserted into the shaft hole of the gear (4), the left and right ends of the gear (4) are respectively fitted with the end faces of the pressing sleeve (3) and the positioning sleeve (1), and the right end face of the pressing sleeve (3) is perpendicular to the axial center line of the centering spindle (2); a left center hole (301) is provided at the center of the left end of the pressing sleeve (3), and a right center hole (201) is provided at the center of the right end of the centering spindle (2).
2. A simple gear shaving fixture as claimed in claim 1, characterized in that: An inner hole (101) is provided at the axial center of the positioning sleeve (1), and the centering core shaft (2) is loosely fitted in the inner hole (101); two threaded through holes (102) are provided on the positioning sleeve (1), and two threaded blind holes (202) are provided on the outer wall of the centering core shaft (2); two locking screws (5) are threadedly fitted in the threaded through holes (102) and the threaded blind holes (202) so that the positioning sleeve (1) and the centering core shaft (2) are fixed as one body.
3. A simple gear shaving fixture as claimed in claim 1, characterized in that: A stepped hole (302) is provided at the axial center of the compression sleeve (3), the core shaft is clearance-matched in the small-diameter section of the stepped hole (302), and the hub of the gear (4) is accommodated in the large-diameter section of the stepped hole (302).
4. A simple gear shaving fixture as claimed in claim 1, characterized in that: The outer diameters of the positioning sleeve (1) and the pressing sleeve (3) are smaller than the tooth root circle diameter of the gear (4).
5. A simple gear shaving fixture as claimed in claim 4, characterized in that: The outer diameters of the positioning sleeve (1) and the pressing sleeve (3) are 0.5 to 1 mm smaller than the tooth root diameter of the gear (4).
6. A simple gear shaving fixture as claimed in claim 1, characterized in that: The outer circumferential surfaces of the positioning sleeve (1) and the pressing sleeve (3) are stepped surfaces, and the small diameter section of the outer circumferential surface is knurled.
7. A simple gear shaving fixture as claimed in claim 1, characterized in that: The left central hole (301) and the right central hole (201) are both tapered holes.