Spline broach assembly

Abstract

The utility model discloses a spline broaching tool assembly which comprises a spline broaching tool bar, the spline broaching tool bar sequentially comprises a front end handle section, a front guide positioning section, a broaching section and a tail end handle section from left to right, a front guide outer spline is machined on the front guide positioning section, and the front guide outer spline is used for positioning a spline hole before scraping; the broaching section of the spline broach rod is sleeved with a sleeve type hard alloy spline broach, the part, between one side of the sleeve type hard alloy spline broach and the front guide outer spline, of the broach rod is sleeved with a first positioning structure, and the part, on the other side of the sleeve type hard alloy spline broach, of the broach rod is provided with a spline rear guide sleeve. A second positioning structure is sleeved on the cutter bar between the sleeve type hard alloy spline broach and the spline rear guide sleeve, and a locking mechanism is arranged at the position, close to the spline rear guide sleeve, of the tail end handle section to fix the sleeve type hard alloy spline broach on the spline broach cutter bar; the anti-vibration gasket is matched with the locking nut, so that the phenomenon that the hard alloy spline broach is loosened is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of gear manufacturing, in particular to a spline broach assembly. Background Art

[0002] The existing spline broaching tool arbor consists of a front shank section, a leading positioning section, a broaching section and a rear shank section from left to right. The rear shank section is the tool lifting part, and a leading external spline is machined on the leading positioning section. The leading external spline is used to position with the spline hole before scraping.

[0003] During assembly, first install the locating key on the spline broach arbor, then put the sleeve carbide spline broach on the broaching section of the spline broach arbor from right to left, and then install the washer and nut on the right side of the sleeve carbide spline broach to fix the sleeve carbide spline broach on the spline broach arbor to form a spline broach assembly.

[0004] The current spline broach assembly has the following problems in actual use:

[0005] (1) The leading external spline on the leading positioning section is not accurately positioned with the spline hole. Since the end of the leading external spline is relatively sharp, it causes a bump when entering the spline hole, making it difficult for the spline broach assembly to enter the spline hole.

[0006] (2) The sleeve-type carbide spline broach is put on the broaching section of the spline broach arbor from right to left, and then a washer and a nut are installed on the right side of the sleeve-type carbide spline broach to fix the sleeve-type carbide spline broach on the spline broach arbor. A nut is usually used for locking, but the nut may become loose during use, causing the carbide spline broach to become loose. Utility Model Content

[0007] The utility model aims to solve the above technical problems and provide a spline broach assembly to prevent the locking nut from loosening and avoid the phenomenon of the carbide spline broach loosening.

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a spline broach assembly, including a spline broach arbor, the spline broach arbor is composed of a front end shank section, a leading positioning section, a broaching section and a rear end shank section from left to right, a leading external spline is processed on the leading positioning section, and the leading external spline is used to locate with the spline hole before scraping;

[0009] A sleeve-type cemented carbide spline broach is mounted on the broaching section of the spline broach arbor, a first positioning structure is mounted on the arbor between one side of the sleeve-type cemented carbide spline broach and the leading external spline, a spline rear guide sleeve is provided on the arbor on the other side of the sleeve-type cemented carbide spline broach, a second positioning structure is mounted on the arbor between the sleeve-type cemented carbide spline broach and the spline rear guide sleeve, and a locking mechanism is provided on the tail end shank section near the spline rear guide sleeve to fix the sleeve-type cemented carbide spline broach on the spline broach arbor;

[0010] The locking mechanism comprises a pair of locking nuts, a shockproof washer is arranged between the pair of locking nuts, and the cross section of the shockproof washer is a symmetrical Y shape.

[0011] The anti-vibration washer is made of nylon, which has good elasticity and toughness. It can play a role in buffering and shock absorption during mechanical assembly, and can effectively improve the tightening force of the locking nut and prevent loosening. The anti-loosening principle mainly includes the friction principle, the compression force principle and the deformation energy principle. When the threaded section of the tool rod is tightened, the friction force of the anti-vibration washer will increase the friction between the threaded section of the tool rod and the nut, thereby preventing it from loosening. This friction can effectively improve the stability of tightening and prevent loosening.

[0012] Secondly, the shock-proof washer forms an enhanced pressure between the threaded section of the tool rod and the locking nut, making the contact between the threaded section of the tool rod and the locking nut closer; this enhanced pressure can effectively increase the tightening force of the locking nut and prevent it from loosening. Due to the increase in the clamping force, the contact surface between the threaded section of the tool rod and the locking nut is tighter, thereby preventing the occurrence of loosening.

[0013] In addition, the principle of shock-proof washers also includes the principle of deformation energy; shock-proof washers require a certain pre-tightening force during installation before they can be installed into place, and at this time the shock-proof washers themselves will generate a certain deformation energy; when the locking nut begins to loosen, the shock-proof washers will release these deformation energies and re-transfer the original pre-tightening force to the locking nut, thereby retightening it and achieving the effect of preventing the locking nut from loosening.

[0014] In general, the principle of anti-vibration washers is to prevent the loosening of locking nuts by increasing friction, increasing compression force and utilizing deformation energy.

[0015] These principles work together to enable the anti-vibration washer to effectively improve the tightening of the locking nut.

[0016] A further preferred technical solution is that the first positioning structure includes a positioning keyway arranged at the end of the leading external spline, and a left keyway arranged at the left end of the sleeve-type carbide spline broach, and the positioning keyway and the left keyway are connected by a separate positioning key.

[0017] A further preferred technical solution is that the second positioning structure includes a right keyway arranged at the right end of the sleeve-type carbide spline broach, and an end key arranged at the end of the spline rear guide sleeve, and the end key is cooperatively connected with the right keyway.

[0018] A further preferred technical solution is that symmetrically distributed guide angles are provided on both sides of the left end spline tooth shape of the leading external spline, and the angle of the guide angle is 5 degrees.

[0019] Compared with the prior art, the utility model has the following beneficial effects: the Y-shaped anti-vibration washer cooperates with the locking nut to prevent the locking nut from loosening, thereby preventing the carbide spline broach from loosening;

[0020] A guide angle is provided at the end of the leading external spline to avoid collision when entering the spline hole, so that the spline broach assembly can easily enter the spline hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the front view of the spline broach arbor of the utility model;

[0022] Figure 2 This is the front view of the utility model;

[0023] Figure 3 This is the front view of the shockproof washer of the utility model;

[0024] In the figure: 100. spline broach shank; 110. front end shank section; 120. leading positioning section; 121. guide angle; 130. broaching section; 140. rear end shank section; 150. leading external spline; 200. positioning key; 300. sleeve-type carbide spline broach; 400. spline rear guide sleeve; 500. washer; 600. locking mechanism; 601. locking nut; 602. shock-proof washer. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Example

[0027] like Figure 1 As shown, a spline broach assembly includes a spline broach arbor 100, wherein the spline broach arbor 100 comprises, from left to right, a front shank section 110, a leading positioning section 120, a broaching section 130 and a rear shank section 140, wherein the rear shank section 140 is a tool lifting portion, and a leading external spline 150 is machined on the leading positioning section 120, and the leading external spline 150 is used for positioning with the spline hole before scraping.

[0028] like Figure 2 As shown, a sleeve-type carbide spline broach 300 is sleeved on the broaching section 130 of the spline broach arbor 100, a first positioning structure is sleeved on the arbor between one side of the sleeve-type carbide spline broach 300 and the leading external spline 150, a spline rear guide sleeve 400 is provided on the arbor on the other side of the sleeve-type carbide spline broach 300, a second positioning structure is sleeved on the arbor between the sleeve-type carbide spline broach 300 and the spline rear guide sleeve 400, and a locking mechanism 600 is provided near the position of the spline rear guide sleeve 400 on the tail end shank section 140 to fix the sleeve-type carbide spline broach 200 on the spline broach arbor 100, thereby forming a spline broach assembly.

[0029] A first positioning structure is provided between the sleeve-type carbide spline broach 300 and the leading external spline 150. The first positioning structure includes a positioning keyway provided at the end of the leading external spline 150, and a left keyway provided at the left end of the sleeve-type carbide spline broach 300. The positioning keyway and the left keyway are connected by a separate positioning key 200 (the positioning key is not shown in the figure. The positioning key is a common technical means used by those skilled in the art and will not be described in detail herein). In this embodiment, the leading external spline 150 is used as the positioning reference of the entire spline broach assembly.

[0030] A second positioning structure is arranged between the sleeve-type carbide spline broach 300 and the spline rear guide sleeve 400. The second positioning structure includes a right key groove arranged at the right end of the sleeve-type carbide spline broach 200, and an end key arranged at the end of the spline rear guide sleeve 400. The end key and the right key groove are connected by a separate positioning key 200.

[0031] The locking mechanism 600 includes a pair of locking nuts 601, and a shock-proof washer 602 is arranged between the pair of locking nuts. A plurality of screw holes are arranged in the locking nut 601 along its circumference. The clamping force on the sleeve-type carbide spline broach 300 is adjusted by arranging screws in the screw holes to adjust the curvature of the spline broach assembly. A washer 500 is also arranged between the locking nut 601 and the spline rear guide sleeve 400.

[0032] like Figure 3 As shown, the cross-section of the shockproof washer 602 is a symmetrical Y-shape, that is, the outer peripheries of both ends of the shockproof washer 602 have 45-degree chamfers, and then a tongue edge extending outward is provided on the outer periphery between the chamfers at both ends. The shockproof washer 602 with this structure cooperates with the locking nut 601 to prevent the locking nut 601 from loosening, thereby preventing the carbide spline broach 300 from loosening.

[0033] The left end spline tooth profile of the leading external spline 150 is provided with symmetrically distributed guide angles 121 on both sides, and the angle of the guide angle 121 is 5 degrees.

[0034] During assembly, Figure 2 As shown, first install the positioning key 200 on the spline broach arbor 100, then put the sleeve type carbide spline broach 300 on the broaching section 130 of the spline broach arbor 100 from right to left, and then install the spline rear guide sleeve 400 on the right side of the sleeve type carbide spline broach 300, and then fix the sleeve type carbide spline broach 300 on the spline broach arbor 100 by the shock-proof washer 602 and the locking nut 601, so as to form the spline broach assembly.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A spline broach assembly, characterized in that: It comprises a spline broaching tool bar, which comprises a front end shank section, a leading positioning section, a broaching section and a rear end shank section from left to right, and a leading external spline is processed on the leading positioning section, and the leading external spline is used for positioning with the spline hole before scraping; A sleeve-type cemented carbide spline broach is mounted on the broaching section of the spline broach arbor, a first positioning structure is mounted on the arbor between one side of the sleeve-type cemented carbide spline broach and the leading external spline, a spline rear guide sleeve is provided on the arbor on the other side of the sleeve-type cemented carbide spline broach, a second positioning structure is mounted on the arbor between the sleeve-type cemented carbide spline broach and the spline rear guide sleeve, and a locking mechanism is provided on the tail end shank section near the spline rear guide sleeve to fix the sleeve-type cemented carbide spline broach on the spline broach arbor; The locking mechanism comprises a pair of locking nuts, a shockproof washer is arranged between the pair of locking nuts, and the cross section of the shockproof washer is a symmetrical Y shape.

2. A spline broach assembly according to claim 1, characterized in that: The first positioning structure includes a positioning keyway arranged at the end of the leading external spline and a left keyway arranged at the left end of the sleeve-type carbide spline broach, and the positioning keyway and the left keyway are connected by a separate positioning key.

3. A spline broach assembly according to claim 1, characterized in that: The second positioning structure includes a right keyway arranged at the right end of the sleeve-type carbide spline broach, and an end key arranged at the end of the spline rear guide sleeve, and the end key is cooperatively connected with the right keyway.

4. A spline broach assembly according to claim 1, characterized in that: The left end spline tooth profile of the leading external spline is provided with symmetrically distributed guide angles on both sides, and the angle of the guide angle is 5 degrees.

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