A ball lock device for quick switching of drive axle reduction shell machining

Abstract

This application discloses a ball lock device for rapid switching during drive axle reduction machining, comprising a ball lock shaft and a tensioning sleeve fitted onto the end of the ball lock shaft; the ball lock shaft contains multiple steel balls, and its circumferential surface has through holes corresponding to the steel balls; the ball lock shaft also has a channel communicating with the installation position of the steel balls, into which a push rod is inserted, the end of which corresponds to the steel ball; when the push rod moves toward the steel ball, the end of the push rod squeezes the steel ball, forcing the steel ball into the through hole and radially squeezing the tensioning sleeve, thereby causing the tensioning sleeve to expand radially. This application achieves instantaneous locking / releasing of the tensioning sleeve by rotating the push rod to drive the steel ball to expand radially, reducing the fixture switching time from 20-30 minutes for traditional bolt tightening to within 10 seconds, significantly improving the production line's flexible production capability.

Description

Technical Field

[0001] This utility model relates to the field of machining of mechanical parts, and in particular to a ball lock device for quick switching in drive axle shell reduction machining. Background Technology

[0002] As a key load-bearing component in heavy vehicles and construction machinery, the machining accuracy of the drive axle housing directly affects the transmission efficiency and reliability of the entire vehicle. During mass production, it is often necessary to frequently switch between different housing fixture models to meet the diverse processing requirements. Traditional fixture fixing methods (such as bolt locking or hydraulic clamping) have significant drawbacks: low switching efficiency—bolt locking requires manual tightening of multiple bolts repeatedly, taking up to tens of minutes and severely restricting production line cycle time; Positioning accuracy fluctuations—Hydraulic systems are susceptible to oil temperature fluctuations and seal aging, leading to a decrease in repeatability (typically only maintaining ±0.1mm level). High maintenance costs—the hydraulic unit requires regular replacement of seals and hydraulic oil, making maintenance complex and prone to failure.

[0003] Although some quick-change devices (such as tapered locating pins) have emerged in the market, their radial rigidity is insufficient, making them prone to micro-displacement under heavy cutting conditions and unable to meet the high load requirements of reduction machining. Therefore, there is an urgent need for a fixture positioning technology that combines rapid switching (second-level), high-rigidity locking, and long-term stability to solve the core bottleneck in the flexible production of drive axle reduction machining. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide a ball lock device for rapid switching during drive axle shell reduction processing.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A ball lock device for quick switching of drive axle housing reduction machining includes a ball lock shaft and a tensioning sleeve sleeved on the end of the ball lock shaft; The ball lock shaft has multiple steel balls inside, and the circumferential surface of the ball lock shaft has through holes corresponding to the steel balls; The ball lock shaft also has a channel inside that communicates with the installation position of the steel ball. A push rod is inserted into the channel, and the end of the push rod corresponds to the steel ball. As the push rod moves toward the steel ball, the end of the push rod presses against the steel ball, which is then forced into the through hole and radially presses against the tensioning sleeve, causing the tensioning sleeve to expand radially.

[0006] Furthermore, the inner wall of the channel has internal threads, and the push rod is a threaded rod that meshes with the inner wall of the channel.

[0007] Furthermore, the end of the push rod away from the steel ball has a nut.

[0008] Furthermore, a receiving sleeve that matches the ball lock shaft is fitted on the outer side of the ball lock shaft.

[0009] Furthermore, the tensioning sleeve is installed on the fixture bridge plate and the machine tool worktable. When the tensioning sleeve expands radially, it supports and fixes the fixture bridge plate at the installation position of the machine tool worktable.

[0010] The beneficial effects of this utility model are as follows: 1. By rotating the top rod to drive the steel ball to expand radially, the instantaneous locking / releasing of the tensioning sleeve is achieved, and the clamp switching time is shortened from 20-30 minutes for traditional bolt tightening to within 10 seconds, which significantly improves the flexible production capacity of the production line; 2. Steel balls are evenly distributed in the through hole to compress and tighten the sleeve (typical layout ≥3 steel balls / 120° symmetrical), forming a full circumferential rigid support and eliminating single-point positioning gaps; combined with the micro-feed adjustment of the threaded push rod (pitch ≤0.5mm), the repeatability positioning accuracy can reach ±0.015mm, meeting the high-precision machining requirements of bearing holes with reduced shells. Attached Figure Description

[0011] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0012] Figure 1 This is a cross-sectional schematic diagram of the ball lock device.

[0013] Figure 2 This is a schematic diagram showing the connection of the ball lock device between the bridge plate and the machine tool worktable. Detailed Implementation

[0014] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0015] Reference Figure 1 , Figure 2 A ball lock device for quick switching of drive axle housing reduction processing includes a ball lock shaft 1, a tensioning sleeve 2 sleeved on the end of the ball lock shaft 1, a sealing ring 5 installed between the tensioning sleeve 2 and the ball lock shaft 1, and a receiving sleeve 3 matching the ball lock shaft 1 sleeved on the outside of the ball lock shaft 1. The ball lock shaft 1 has multiple steel balls inside, such as steel ball 6 and steel ball 7, and the circumferential surface of the ball lock shaft 1 is provided with through holes corresponding to the steel balls; The ball lock shaft 1 is also provided with a channel that communicates with the installation position of the steel ball. The push rod 4 is inserted into the channel, and the end of the push rod 4 corresponds to the steel ball 7. When the push rod 4 moves toward the steel ball 7, the end of the push rod 4 presses against the steel ball 7, the steel ball 6 is squeezed into the through hole, and radially presses against the tensioning sleeve 2, so that the tensioning sleeve 2 expands radially.

[0016] Specifically, the inner wall of the channel has internal threads, and the push rod 4 is a threaded rod that meshes with the inner wall of the channel. The end of the push rod 4 away from the steel ball 7 has a nut. Tighten the nut with a hex wrench, and the nut drives the push rod 4 to rotate. When the push rod 4 moves toward the steel ball 7, the end of the push rod 4 squeezes the steel ball 7, and the steel ball 6 is squeezed into the through hole and radially squeezes the tensioning sleeve 2 so that the tensioning sleeve 2 expands radially.

[0017] In actual use, the tensioning sleeve 2 is installed on the fixture bridge plate and the machine tool worktable. When the tensioning sleeve 2 expands radially, it supports and fixes the fixture bridge plate at the installation position of the machine tool worktable.

[0018] This application drives the steel ball to expand radially by rotating the top rod 4, thereby achieving instantaneous locking / releasing of the tensioning sleeve 2. The clamp switching time is reduced from 20-30 minutes for traditional bolt tightening to within 10 seconds, significantly improving the flexible production capacity of the production line. The steel balls are evenly distributed in the through hole to compress the tensioning sleeve (typical layout ≥3 steel balls / 120° symmetrical), forming a full circumferential rigid support and eliminating single-point positioning gaps; combined with the micro-feed adjustment of the threaded push rod (pitch ≤0.5mm), the repeatability positioning accuracy can reach ±0.015mm, meeting the high-precision machining requirements of bearing holes with reduced shells.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A ball lock device for quick switching of drive axle reduction shell processing, characterized in that, Includes a ball lock shaft and a tensioning sleeve fitted onto the end of the ball lock shaft; The ball lock shaft has multiple steel balls inside, and the circumferential surface of the ball lock shaft is provided with through holes corresponding to the steel balls; The ball lock shaft is also provided with a channel communicating with the installation position of the steel ball. A push rod is inserted into the channel, and the end of the push rod corresponds to the steel ball. As the push rod moves toward the steel ball, the end of the push rod presses against the steel ball, which is then forced into the through hole and radially presses against the tension sleeve, causing the tension sleeve to expand radially.

2. The ball lock device for quick change of drive axle reduction shell machining according to claim 1, characterized in that, The inner wall of the channel has internal threads, and the push rod is a threaded rod that engages with the inner wall of the channel.

3. The ball lock device for rapid switching in drive axle shell reduction machining according to claim 1, characterized in that, The end of the push rod away from the steel ball has a nut.

4. The ball lock device for quick change of drive axle reduction shell machining according to claim 1, characterized in that, The outer side of the ball lock shaft is fitted with a receiving sleeve that matches the ball lock shaft.

5. The drive axle reducing shell process quick switch ball lock device of claim 1, wherein, The tensioning sleeve is installed on the clamping bridge plate and the machine tool worktable. When the tensioning sleeve expands radially, it supports and fixes the clamping bridge plate at the installation position of the machine tool worktable.

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