A curved gear machining tool

Abstract

The utility model discloses a kind of curved gear processing cutters, including positioning frame, drive assembly and the expansion positioning assembly of fixed setting in the positioning frame one side. The drive assembly includes drive cylinder and toggle block, the drive cylinder is used to provide linear thrust and drive the toggle block deflection occurs;The toggle block is movably connected with the core rod in expansion positioning assembly by linkage rod, for realizing the axial sliding of core rod in main sleeve base;The axial movement of the core rod drives inclined strut rod to slide, and then push expansion ear block to open around fulcrum and realize workpiece clamping, after clamping process end, it can be automatically reset by reset structure and release workpiece.The utility model structure is compact, clamping response is rapid, transmission path is short, suitable for the efficient stable processing of multiple size curved gear, especially suitable for quick clamping and release operation under the automatic processing environment.

Description

Technical Field

[0001] This utility model relates to the field of gear processing technology, specifically a tool for machining curved gears. Background Technology

[0002] Due to their excellent meshing performance and high transmission efficiency, helical gears are widely used in precision mechanical transmission systems. To ensure gear machining quality, the clamping and positioning devices used in the machining process must possess high stability, high positioning accuracy, and rapid response capabilities.

[0003] In existing tools for machining curved gears, the workpiece clamping and positioning mechanisms mostly employ simple radial expansion sleeve or helical extrusion structures. These structures typically rely on screw rotation or cylinder-driven expansion blocks to directly contact the inner wall of the workpiece for clamping. However, in practical applications, the following problems often arise:

[0004] Long clamping force transmission path and low efficiency: In common structures, the transmission mechanism uses many intermediate links, such as screw-slider-expansion block and other multi-stage indirect force transmission paths, which have mechanical clearance and friction loss, resulting in uneven clamping force or slow response, affecting the stable positioning of the workpiece.

[0005] Imperfect reset structure: Some devices lack an active reset mechanism or rely on elastic elements for reset, resulting in poor reset reliability and low repeatability, which leads to inconvenience in disassembling and assembling workpieces and low efficiency.

[0006] Therefore, how to design a curved gear machining tool with a compact structure, reliable clamping force, high positioning accuracy, and suitable for automated clamping has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0007] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0008] Therefore, the technical solution adopted by this utility model is as follows: a curved gear machining tool, including a positioning frame, a drive assembly, and a clamping positioning assembly, which form a mechanical linkage relationship to achieve efficient and stable workpiece clamping and resetting actions. The drive assembly drives the core rod to move axially through a toggle mechanism, and then achieves radial clamping action through a diagonal brace structure, improving the clamping response speed and structural compactness; the clamping positioning assembly is composed of a main sleeve, core rod, expansion lug, diagonal brace, and reset pin, etc., to achieve complete cyclic control of clamping and resetting actions.

[0009] In a preferred example, the drive assembly is configured to include a drive cylinder and a toggle block. The drive cylinder is fixedly mounted on the surface of the positioning frame to provide linear thrust. The toggle block is rotatably mounted inside the positioning frame and converts the linear motion of the drive cylinder into deflection motion through the toggle structure, outputting an angular motion to the tensioning assembly. Specifically, the drive cylinder pushes the toggle block to deflect, compressing the structural space while converting the thrust direction, effectively improving the structural response efficiency and spatial adaptability.

[0010] In a preferred embodiment, the drive assembly is further configured to connect to the core rod via a linkage, thereby enabling the toggle joint to deflect and drive the core rod to slide axially along the main sleeve. Specifically, this linkage structure forms a stable transmission chain, reduces motion transmission errors, and improves the accuracy of core rod driving and clamping reliability.

[0011] In a preferred embodiment, the expansion and positioning assembly is configured to include a main sleeve, a core rod, and multiple expansion lugs. The core rod is slidably sleeved inside the main sleeve, and the multiple expansion lugs are rotatably mounted on the outer periphery of the main sleeve and evenly distributed along the circumferential direction for radially clamping the workpiece. Specifically, this arrangement can achieve multi-point uniform clamping, improve clamping stability, and adapt to the clamping requirements of gears of different specifications.

[0012] In a preferred embodiment, the expansion and positioning assembly is further configured such that: a reset groove and an arc groove are provided on the surface of the core rod; one end of the diagonal brace abuts against the arc groove, and the other end abuts against the expansion lug; and an inclined swing groove is provided in the main sleeve for the diagonal brace to slide. Specifically, the forward movement of the core rod pushes the diagonal brace to slide along the inclined swing groove, converting the axial force into a radial expansion force by means of the inclined plane principle, thereby causing the expansion lug to open and achieving a reliable workpiece clamping action.

[0013] In a preferred example, the reset pin radially penetrates the main sleeve, with one end engaging with the core rod reset groove and the other end sliding against the expansion lug. Specifically, during the core rod retraction process, the reset groove guides the reset pin outward, pushing the expansion lug to rotate in the opposite direction, quickly resetting and releasing the workpiece, thus improving loading and unloading efficiency.

[0014] In a preferred example, the drive cylinder is a hydraulic drive rod or an electric push rod structure, with a pivot pin on its surface and fixedly connected to the positioning frame. Specifically, this drive method is adaptable to various processing scenarios, has the advantages of precise control and fast response, and is beneficial for the integration of automated clamping systems.

[0015] In summary, through the above-mentioned technical configuration, this utility model achieves multiple technical advantages such as compact structure, short force transmission path, fast response speed, reliable clamping, and adaptive reset, making it particularly suitable for curved gear machining applications with high requirements for clamping accuracy and efficiency.

[0016] The beneficial effects achieved by this utility model are as follows:

[0017] 1. In this utility model, the drive assembly consisting of a drive cylinder, toggle block and connecting rod and the expansion and positioning assembly are linked together to achieve smooth axial movement of the core rod, and the expansion lug is driven at an angle by the diagonal brace, thereby achieving reliable clamping of the workpiece, improving the efficiency and stability of the clamping process, and is suitable for the processing requirements of complex curved gears.

[0018] 2. In this utility model, the inclined bracing mechanism converts the axial movement of the core rod into the radial expansion of the lug block, effectively improving the transmission efficiency of clamping force and avoiding the clamping failure problem caused by large gaps or complex force transmission paths in traditional structures; at the same time, in conjunction with the reset pin structure, the clamping mechanism can automatically release the workpiece after the drive component is reset, improving the convenience of tool replacement and workpiece loading and unloading, and is suitable for use in automated continuous processing environments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0020] Figure 2 This is a schematic cross-sectional view of the drive assembly and the expansion and positioning assembly according to one embodiment of the present invention;

[0021] Figure 3 This is a partial cross-sectional structural diagram of the expansion and positioning component according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the connection structure between the core rod and the elbow block according to one embodiment of the present invention.

[0023] Figure label:

[0024] 100. Positioning frame;

[0025] 200. Drive assembly; 210. Drive cylinder; 220. Toggle block; 221. Connecting rod;

[0026] 300. Tightening and positioning assembly; 310. Main sleeve; 320. Core rod; 330. Expansion lug; 340. Diagonal brace; 311. Reset pin; 312. Diagonal swing groove; 321. Reset groove; 322. Arc groove. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0028] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of this invention.

[0029] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a cutting tool for machining curved gears.

[0030] Combination Figures 1-4 As shown, the present invention provides a curved gear machining tool, including: a positioning frame 100, a drive assembly 200, and a tensioning positioning assembly 300 fixedly disposed on one side of the positioning frame 100.

[0031] The drive assembly 200 includes a drive cylinder 210, a toggle block 220, and a connecting rod 221. The drive cylinder 210 is a hydraulic drive rod or an electric push rod structure, mounted on the surface of the positioning frame 100. Its output end is movably connected to one end of the toggle block 220, and the drive cylinder 210 provides linear thrust. The toggle block 220 is rotatably mounted inside the positioning frame 100, arranged in a right-angled shape, and is used to achieve deflection motion under the drive of the drive cylinder 210. The other end of the toggle block 220 is rotatably connected to the connecting rod 221, and the other end of the connecting rod 221 is movably connected to the core rod 320, used to convert the deflection motion of the toggle block 220 into axial movement of the core rod 320.

[0032] The expansion and positioning assembly 300 includes: a main sleeve 310, a core rod 320, an expansion lug 330, a diagonal brace 340, and a reset pin 311.

[0033] The main sleeve 310 is fixedly installed on one side of the positioning frame 100. Its axial direction is used to accommodate the sliding installation of the core rod 320. The inner side of the main sleeve 310 is provided with a plurality of radially arranged inclined swing grooves 312, and the outer periphery is used to rotatably install a plurality of the expansion lugs 330. The expansion lugs 330 are evenly arranged along the circumference of the main sleeve 310 and are limited to rotation with a pin as the fulcrum.

[0034] The core rod 320 is slidably sleeved on the axis of the main sleeve 310. Its surface is provided with a reset groove 321 and an arc groove 322. The reset groove 321 is arranged from shallow to deep along the axis of the core rod, and the arc groove 322 is used to cooperate with the diagonal brace 340. The core rod 320 achieves axial movement under the drive assembly 200.

[0035] The diagonal brace 340 is slidably disposed within the diagonal groove 312, with one end abutting against the arc groove 322 of the core rod 320 and the other end abutting against the inner surface of the expansion lug 330. When the core rod 320 moves axially, the diagonal brace 340 generates a conversion from axial force to radial force, causing the expansion lug 330 to open outward around its axis of rotation, thereby achieving radial clamping and positioning of the gear workpiece.

[0036] The reset pin 311 is radially arranged, with one end movably penetrating through the main sleeve 310, and the other end slidingly abutting against the reset groove 321 of the core rod 320 and the inner side of the expansion lug 330. During the axial movement of the core rod 320, the reset groove 321 guides the reset pin 311 to generate radial displacement, thereby controlling the reset action of the expansion lug 330.

[0037] Working principle and usage process of this utility model:

[0038] This cutting tool achieves efficient, stable clamping and precise positioning of curved gears during machining through the synergistic action of the drive component and the expansion and positioning component. Its core lies in the linkage relationship between the toggle mechanism and the sliding and expansion structure.

[0039] Drive transmission: The drive cylinder 210 in the drive assembly provides linear thrust, which pushes the toggle block 220 to deflect; the toggle block 220 is movably connected to the core rod 320 through the connecting rod 221, which drives the core rod to slide axially in the main sleeve 310.

[0040] Tightening action: The axial movement of the core rod 320 drives the reset pin 311 and the diagonal brace 340 to move through its external reset groove 321 and arc groove 322;

[0041] The diagonal brace 340 slides in the diagonal groove 312, changing from an oblique direction to a vertical direction along the surface of the core rod 320, causing the expansion lug 330 to deflect, thereby increasing the radial distance between the core rod 320 and the expansion lug 330. The diagonal brace structure causes the expansion lug 330 to open around the fulcrum, achieving radial expansion. The expansion lug 330 cooperates with the gear workpiece to achieve firm clamping of the workpiece.

[0042] Reset and release: When the drive cylinder 210 moves in the opposite direction, the toggle block 220 resets, the core rod 320 retracts, the reset groove 321 moves the reset pin 311 radially outward, pushing the expansion lug 330 to reset, causing the expansion lug 330 to rotate and reset, the clamping state is released, and the workpiece can be replaced.

[0043] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A curved gear machining tool, characterized by include: The positioning frame (100), drive assembly (200), and expansion positioning assembly (300) fixed to one side of the positioning frame (100) are provided. The drive assembly (200) includes a drive cylinder (210) and an elbow block (220) rotatably mounted on the surface of the positioning frame (100). The output end of the drive cylinder (210) is movably connected to the surface of the elbow block (220). The expansion positioning assembly (300) includes a main sleeve (310), a core rod (320), and an expansion lug (330). The core rod (320) is slidably sleeved on the surface of the main sleeve (310). The surface of the elbow block (220) is rotatably connected to the core rod. The connecting rod (221) is movably connected to the surface of the rod (320). The expansion lug (330) is rotatably installed on the outer periphery of the main sleeve (310). The inner side of the main sleeve (310) is provided with a slanted swing groove (312), and a slanted support rod (340) is movably installed on the inner side of the slanted swing groove (312). The two ends of the slanted support rod (340) abut against the surfaces of the core rod (320) and the expansion lug (330), respectively. A reset pin (311) movably passes through the surface of the main sleeve (310), and the two ends of the reset pin (311) movably abut against the surfaces of the core rod (320) and the expansion lug (330), respectively.

2. A curve gear machining tool according to claim 1, characterized in that, The toggle block (220) is rotatably mounted inside the positioning frame (100) and is at a right angle. The toggle block (220) is driven to deflect by the drive cylinder (210).

3. A curve gear machining tool according to claim 1, characterized in that, The core rod (320) is slidably sleeved on the axis of the main sleeve (310), and the number of the expansion lugs (330) is several and they are evenly distributed in a circumferential direction on the outer periphery of the main sleeve (310).

4. The tool for machining curved gears according to claim 1, characterized in that, The surface of the main sleeve (310) is provided with a fulcrum for the rotation of the expansion lug (330), and the reset pin (311) and the diagonal brace (340) are respectively arranged on both sides of the fulcrum.

5. The tool for machining curved gears according to claim 1, characterized in that, The core rod (320) has a reset groove (321) at the end of the reset pin (311) on its surface, and the depth of the reset groove (321) gradually increases in the direction opposite to the drive assembly (200). The reset pin (311) is arranged radially and its two ends slide against the surface of the reset groove (321) and the inner side of the expansion lug (330), respectively.

6. The tool for machining curved gears according to claim 1, characterized in that, The inner side of the main sleeve (310) is provided with a radially arranged inclined swing groove (312), the surface of the core rod (320) is provided with an arc groove (322), and the inclined support rod (340) is slidably arranged on the inner side of the inclined swing groove (312) and one end abuts against the surface of the arc groove (322).

7. The tool for machining curved gears according to claim 1, characterized in that, The drive cylinder (210) is a hydraulic drive rod or an electric push rod structure, and its surface is provided with a pivot pin fixed to the surface of the positioning frame (100).

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