A spline sleeve inner hole broaching broach guide and support device

Abstract

The utility model relates to mechanical processing equipment technical field discloses a spline sleeve inner hole broaching's broach guide and supporting device, and the device includes bottom plate, and the mounting frame, fixed mechanism, stabilizer and motor fixedly connected at bottom plate top, motor output fixedly connected broach, and the broach rotation is connected in the mounting frame inside and is equipped with the lantern ring of side wall, and fixed mechanism sets up between mounting frame and stabilizer, including cylinder, lifting rod, mounting plate, connecting rod, connecting frame, connecting column, connecting block and clamping sleeve, and cylinder drives lifting rod to slide, drives connecting rod to rotate in mounting plate side wall, and then through connecting frame, connecting column and connecting block drive clamping sleeve to contract to clamp spline sleeve. The utility model discloses through the automatic stability clamping of multibar linkage structure, and cooperate stabilizer to support broach end, effectively prevent workpiece deflection and tool vibration in the processing, and the stability and precision of spline sleeve inner hole processing have been improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of machining equipment technology, specifically to a broach guide and support device for broaching the inner hole of a spline sleeve. Background Technology

[0002] In the existing spline sleeve inner hole machining process, it is usually necessary to use special tools to cut the inner wall of the workpiece.

[0003] Because spline sleeves are typically thin-walled and have a unique shape, they are prone to loosening or shifting under cutting forces if not properly secured during machining. This is especially true when using long-shaft broaches or cutting tools for deep hole machining, where existing fixtures often lack effective automatic centering and clamping mechanisms, resulting in cumbersome operation and unstable clamping force. Furthermore, slender tools are prone to radial runout during high-speed rotation or movement, or cantilever end drooping due to gravity. The lack of necessary auxiliary support structures not only reduces machining accuracy but can also, in severe cases, lead to tool damage or workpiece scrap.

[0004] Therefore, this utility model proposes a broach guide and support device for broaching the inner hole of a spline sleeve to overcome the shortcomings of the prior art. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a broach guide and support device for broaching the inner hole of a spline sleeve, aiming to improve the problems of poor workpiece clamping stability, low machining accuracy due to lack of effective support for long shaft tools, and cumbersome operation in the existing spline sleeve processing equipment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a broach guide and support device for broaching the inner hole of a spline sleeve, comprising a base plate, and a mounting bracket, a fixing mechanism, a stabilizing bracket and a motor fixedly connected to the top of the base plate, wherein the output end of the motor is fixedly connected to the broach, the broach is rotatably connected inside the mounting bracket, and a collar and a fixing mechanism are fixedly connected to the side wall of the mounting bracket. The fixing mechanism includes a cylinder, a lifting rod, a mounting plate, a connecting rod, a connecting frame, a connecting column, a connecting block, and a clamping sleeve. Furthermore, the cylinder, the lifting rod, the connecting rod, and the clamping sleeve are combined in the following manner: the cylinder is fixedly connected inside the base plate, and the output end of the cylinder is fixedly connected to the lifting rod; the mounting plate is fixedly connected to the top of the base plate, and the connecting rod is rotatably connected to the side wall of the mounting plate; the outside of the lifting rod is rotatably connected to the connecting rod, the top of the connecting rod is fixedly connected to the connecting frame, the connecting column is fixedly connected inside the connecting frame, the connecting block is fixedly connected to the side wall of the connecting column, and the connecting block is fixedly connected to the clamping sleeve; the stabilizing frame is used to support the other end of the spline sleeve.

[0007] Preferably, a positioning pin is fixedly provided on the side wall of the mounting plate, and a rotating hole with clearance fit to the positioning pin is opened in the middle of the connecting rod. The connecting rod and the mounting plate form a lever-type rotating structure through the positioning pin. A long strip-shaped sliding groove is opened at the end of the connecting rod away from the connecting frame, and a sliding pin is horizontally fixed at the end of the lifting rod. The sliding pin is slidably fitted in the sliding groove, thereby converting the linear motion of the cylinder into the swing of the connecting rod.

[0008] Preferably, the clamping sleeve includes two semi-circular ring-shaped clamps, which are arranged opposite each other to form a cylindrical structure. The inner sidewall of the clamps is provided with several anti-slip grooves along the axial direction, and the anti-slip grooves are embedded with rubber pads to increase friction and protect the workpiece surface. Preferably, the stabilizer includes a fixed vertical plate and a V-shaped support block disposed on the top of the fixed vertical plate. The top of the V-shaped support block is provided with a V-shaped positioning groove. The central axis of the positioning groove and the central axis of the broach are located in the same vertical plane to ensure the coaxiality of the workpiece.

[0009] Preferably, the output shaft of the motor is fixedly connected to one end of the broach via a coupling, and a deep groove ball bearing is embedded in the mounting bracket. The broach passes through the inner ring of the deep groove ball bearing and is interference-fitted with the deep groove ball bearing to ensure smooth rotation.

[0010] Preferably, the base plate has an internal mounting cavity for accommodating the cylinder, and a guide hole is provided on the top of the base plate corresponding to the position of the lifting rod. The lifting rod slides through the guide hole, and a guide copper sleeve is provided on the inner wall of the guide hole to reduce friction loss.

[0011] Preferably, there are two connecting blocks, which are symmetrically welded to both sides of the connecting column. The outer wall of the clamping sleeve is provided with mounting ears, which are fixedly connected to the connecting blocks by bolts for easy disassembly and replacement.

[0012] Preferably, the collar is coaxially arranged with the broach, and the inner diameter of the collar is larger than the maximum outer diameter of the broach. An annular brush is provided on the inner wall of the collar near the broach, and the bristles of the annular brush abut against the surface of the broach for cleaning chips.

[0013] Preferably, the connecting frame is an inverted U-shaped structure, and the two ends of the connecting column are respectively fixedly connected between the two side walls of the U-shaped structure. The connecting column and the connecting frame are integrally formed, resulting in high structural strength.

[0014] This utility model has the following beneficial effects: 1. This utility model, by setting a fixing mechanism, uses a cylinder to drive the lifting rod and connecting rod assembly to drive the clamping sleeve to automatically retract and clamp the spline sleeve, which solves the problems of unstable workpiece fixing and easy displacement during processing in the prior art, and achieves the technical effect of high automation, firm clamping and effective prevention of workpiece movement.

[0015] 2. This utility model provides multi-point support and guidance for both ends and the middle part of the broach by setting mounting brackets and stabilizing brackets at both ends of the base plate and using collars. This solves the problem of radial runout or cantilever drooping that long shaft tools are prone to during machining, and achieves the technical effect of improving the rigidity of the machining system and ensuring the machining accuracy of the spline sleeve inner hole.

[0016] 3. This utility model, by adopting a multi-link transmission structure, transforms the linear motion of the cylinder into the radial clamping action of the sleeve, solving the problems of cumbersome operation and difficulty in controlling the force of traditional clamps, and achieving the technical effect of compact structure, smooth transmission and uniform clamping force. Attached Figure Description

[0017] Figure 1 This is a perspective view of a broach guide and support device for broaching the inner hole of a spline sleeve according to the present invention. Figure 2 This is a side view of a broach guide and support device for broaching the inner hole of a spline sleeve according to the present invention; Figure 3 This is a schematic diagram of the clamping sleeve of the broach guide and support device for broaching the inner hole of a spline sleeve according to the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 for Figure 3 Enlarged view of point B in the middle.

[0018] Legend: 1. Base plate; 2. Mounting bracket; 3. Collar; 4. Fixing mechanism; 401. Cylinder; 402. Lifting rod; 403. Mounting plate; 404. Connecting rod; 405. Connecting bracket; 406. Connecting column; 407. Connecting block; 408. Clamping sleeve; 5. Puller knife; 6. Stabilizer; 7. Motor. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Reference Figures 1-5 The present invention provides an embodiment of a broach guide and support device for broaching the inner hole of a spline sleeve, comprising a base plate 1, and a mounting bracket 2, a fixing mechanism 4, a stabilizing bracket 6, and a motor 7 fixedly mounted on the top of the base plate 1. The base plate 1 serves as the support base for the entire device and is used to support the various functional components. The mounting bracket 2 is used to support and guide the rotation of the broach 5. The fixing mechanism 4 is used to realize the automatic clamping and fixing of the workpiece. The stabilizing bracket 6 is used to provide auxiliary support for the suspended end of the workpiece. The motor 7 is used to provide the rotational power required for broaching. The motor 7 is horizontally mounted on the base plate 1, and its output end is fixedly connected to the broach 5 via a coupling. The broach 5 is rotatably connected inside the mounting bracket 2. Specifically, the mounting bracket 2 is inlaid with a deep groove ball bearing, and the broach 5 passes through the inner ring of the deep groove ball bearing and is interference-fitted with the deep groove ball bearing, thereby ensuring the concentricity and stability of the broach 5 when rotating at high speed. A collar 3 is also fixedly connected to the side wall of the mounting bracket 2. The collar 3 is fitted on the outside of the broach 5 for auxiliary protection and cleaning.

[0021] The fixing mechanism 4 includes a cylinder 401, a lifting rod 402, a mounting plate 403, a connecting rod 404, a connecting frame 405, a connecting column 406, a connecting block 407, and a clamping sleeve 408. The cylinder 401 is concealed in a mounting cavity inside the base plate 1, and its output end is vertically and fixedly connected to the lifting rod 402. A guide hole is provided on the top of the base plate 1 corresponding to the position of the lifting rod 402. The lifting rod 402 slides through the guide hole, and a guide copper sleeve is provided on the inner wall of the guide hole to reduce the frictional resistance of the lifting rod 402 during movement and ensure straightness.

[0022] Mounting plate 403 is vertically fixed to the top of base plate 1, located on one side of cylinder 401. Connecting rod 404 acts as a transmission lever, rotatably connected to the side wall of mounting plate 403. Specifically, a positioning pin is fixedly installed on the side wall of mounting plate 403, and a rotating hole with clearance fit to the positioning pin is opened in the middle of connecting rod 404, allowing connecting rod 404 to rotate around the positioning pin in a vertical plane.

[0023] The power transmission between the connecting rod 404 and the lifting rod 402 is achieved through a sliding fit: the end of the connecting rod 404 away from the connecting frame 405 is provided with a long strip-shaped groove, and the top of the lifting rod 402 is horizontally fixed with a sliding pin. The sliding pin is slidably fitted in the groove of the connecting rod 404. When the lifting rod 402 moves up and down, the sliding pin moves the connecting rod 404 to swing around the central positioning pin. The top of the connecting rod 404 is fixedly connected to the connecting frame 405, which has an inverted U-shaped structure. A connecting post 406 is fixedly connected between its two internal walls. The connecting post 406 and the connecting frame 405 are integrally formed to enhance rigidity. Two connecting blocks 407 are symmetrically welded to the side walls of the connecting post 406. These two connecting blocks 407 serve as mounting seats for the end effector and are fixedly connected to the clamping sleeve 408. The clamping sleeve 408 is directly used to contact and clamp the spline sleeve workpiece.

[0024] In a preferred embodiment, the clamping sleeve 408 comprises two semi-circular ring-shaped jaws, which are arranged opposite each other to form a complete cylindrical structure that can enclose the outer wall of the spline sleeve. The outer wall of the clamping sleeve 408 is provided with mounting ears, which are fixedly connected to the connecting block 407 by bolts, facilitating disassembly and replacement after wear. To improve clamping stability and prevent damage to the workpiece surface, several anti-slip grooves are formed axially on the inner sidewalls of the jaws, and rubber pads are embedded within these grooves to increase friction through the elastic deformation of the rubber.

[0025] As another preferred embodiment, the stabilizer 6 includes a fixed vertical plate and a V-shaped support block disposed on the top of the fixed vertical plate. The top of the V-shaped support block is provided with a V-shaped positioning groove. The central axis of the positioning groove is strictly aligned with the central axis of the broach 5 and is located in the same vertical plane. When processing long workpieces, one end of the spline sleeve is clamped by the clamping sleeve 408, and the other end overlaps in the positioning groove of the V-shaped support block. The V-shaped structure has an automatic centering function, which can effectively prevent the workpiece from radially shifting during processing. Furthermore, the collar 3 is coaxially mounted with the broach 5. The inner diameter of the collar 3 is designed to be larger than the maximum outer diameter of the broach 5 to avoid interference. A ring-shaped brush is provided on the inner wall of the collar 3 near the broach 5, with the bristles of the ring brush abutting against the surface of the broach 5. When the broach 5 rotates out or in, the ring brush can automatically clean the metal chips on the surface of the broach 5, preventing chip accumulation from affecting the machining quality.

[0026] Working principle: When using this equipment, first place the spline sleeve to be processed inside the fixing mechanism 4, so that it is located in the inner cavity of the clamping sleeve 408, and at the same time ensure that the broach 5 has passed through the inner hole of the spline sleeve, and make one end of it rotatably connected to the mounting bracket 2 fixedly connected to the top of the base plate 1. The collar 3 fixedly connected to the side wall of the mounting bracket 2 plays an auxiliary support and guiding role for the broach 5. Then, the motor 7 fixedly connected to the top of the base plate 1 is started. The motor 7 drives the broach 5 fixedly connected to its output end to start rotating, providing the main force for cutting. At this time, the stabilizer 6 fixedly connected to the top of the base plate 1 effectively supports the other end of the spline sleeve or broach, preventing the slender broach 5 or the workpiece from radially shifting due to gravity or cutting force during the processing, and further improving the overall stability of the equipment.

[0027] When using the fixing mechanism 4 for fixing, first start the cylinder 401 fixedly connected inside the base plate 1. The piston rod of the cylinder 401 extends and drives the lifting rod 402 fixedly connected to its output end to slide upward. During the upward movement, the lifting rod 402 pushes the bottom end of the connecting rod 404 rotatably connected to its outside, so that the connecting rod 404 rotates around its connection point on the side wall of the mounting plate 403. The rotation of the connecting rod 404 synchronously drives the connecting frame 405 fixedly connected to its top and the connecting column 406 fixedly connected inside the connecting frame 405 to rotate. The rotation of the connecting column 406 is transmitted to the clamping sleeve 408 through the connecting block 407 fixedly connected to its side wall. The clamping sleeve 408 is driven by the rotation of the connecting rod 404 and the connecting block 407 to produce a contraction action, thereby tightly clamping the spline sleeve set inside it and forcing the inner wall of the spline sleeve to fit tightly against the outer surface of the rotating broach 5, effectively preventing the spline sleeve and the broach 5 from shaking or shifting relative to each other during intense processing.

[0028] After processing is completed, cylinder 401 is restarted to control its piston rod to retract, which drives the lifting rod 402 to slide downward. Then, through the reverse linkage of connecting rod 404, connecting frame 405, connecting column 406 and connecting block 407, the clamping sleeve 408 is released from the spline sleeve after processing, so that the workpiece can be removed.

Claims

1. A broach guide and support device for broaching the inner hole of a spline sleeve, comprising a base plate (1), and a mounting bracket (2), a fixing mechanism (4), a stabilizing bracket (6) and a motor (7) fixedly connected to the top of the base plate (1); The output end of the motor (7) is fixedly connected to the puller (5), the puller (5) is rotatably connected inside the mounting bracket (2), and the side wall of the mounting bracket (2) is fixedly connected to the collar (3). Its features are: The fixing mechanism (4) includes a cylinder (401), a lifting rod (402), a mounting plate (403), a connecting rod (404), a connecting frame (405), a connecting column (406), a connecting block (407), and a clamping sleeve (408). The cylinder (401) is fixedly connected inside the base plate (1), and the output end of the cylinder (401) is fixedly connected to the lifting rod (402). The mounting plate (403) is fixedly connected to the top of the base plate (1), and the connecting rod (404) is rotatably connected to the side wall of the mounting plate (403); the lifting rod (402) is rotatably connected to the connecting rod (404) on the outside, the top of the connecting rod (404) is fixedly connected to the connecting frame (405), the connecting column (406) is fixedly connected inside the connecting frame (405), the connecting block (407) is fixedly connected to the side wall of the connecting column (406), and the connecting block (407) is fixedly connected to the clamping sleeve (408); the stabilizing frame (6) is used to support the other end of the spline sleeve.

2. The broach guide and support device for broaching the inner hole of a spline sleeve according to claim 1, characterized in that: The mounting plate (403) has a positioning pin fixedly installed on its side wall. The connecting rod (404) has a rotating hole in the middle that is clearance-fitted with the positioning pin. The connecting rod (404) and the mounting plate (403) form a lever-type rotating structure through the positioning pin. The end of the connecting rod (404) away from the connecting frame (405) has a long groove. The end of the lifting rod (402) is horizontally fixed with a sliding pin, which is slidably fitted in the groove.

3. The broach guide and support device for broaching the inner hole of a spline sleeve according to claim 1, characterized in that: The clamping sleeve (408) includes two semi-circular ring-shaped clamps. The two clamps are arranged opposite each other to form a cylindrical structure. Several anti-slip grooves are formed on the inner sidewall of the clamps along the axial direction. A rubber pad is embedded in the anti-slip groove.

4. The broach guide and support device for broaching the inner hole of a spline sleeve according to claim 1, characterized in that: The stabilizer (6) includes a fixed vertical plate and a V-shaped support block set on the top of the fixed vertical plate. The top of the V-shaped support block is provided with a V-shaped positioning groove. The central axis of the positioning groove and the central axis of the puller (5) are located in the same vertical plane.

5. The broach guide and support device for broaching the inner hole of a spline sleeve according to claim 1, characterized in that: The output shaft of the motor (7) is fixedly connected to one end of the broach (5) via a coupling. A deep groove ball bearing is embedded in the mounting bracket (2). The broach (5) passes through the inner ring of the deep groove ball bearing and is interference-fitted with the deep groove ball bearing.

6. The broach guide and support device for broaching the inner hole of a spline sleeve according to claim 1, characterized in that: The base plate (1) has an installation cavity for accommodating the cylinder (401) inside. The top of the base plate (1) has a guide hole corresponding to the position of the lifting rod (402). The lifting rod (402) slides through the guide hole, and a guide copper sleeve is provided on the inner wall of the guide hole.

7. The broach guide and support device for broaching the inner hole of a spline sleeve according to claim 1, characterized in that: There are two connecting blocks (407), and the two connecting blocks (407) are symmetrically welded to both sides of the connecting column (406). The outer wall of the clamping sleeve (408) is provided with mounting ears, and the mounting ears are fixedly connected to the connecting blocks (407) by bolts.

8. The broach guide and support device for broaching the inner hole of a spline sleeve according to claim 1, characterized in that: The collar (3) is coaxially arranged with the puller (5), and the inner diameter of the collar (3) is greater than the maximum outer diameter of the puller (5). An annular brush is provided on the inner wall of the collar (3) near the puller (5), and the bristles of the annular brush abut against the surface of the puller (5).

9. The broach guide and support device for broaching the inner hole of a spline sleeve according to claim 1, characterized in that: The connecting frame (405) has an inverted U-shaped structure. The two ends of the connecting column (406) are fixedly connected between the two side walls of the U-shaped structure, and the connecting column (406) and the connecting frame (405) are integrally formed.

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