Broaching machine tool for broaching spline of tow hook

Abstract

The utility model relates to the technical field of tool clamps, in particular to a broaching machine tool for broaching splines of a tow hook, which comprises a mounting disc assembled with a broaching machine and an auxiliary frame for positioning circumferential tooth positions of a broach, a positioning disc is coaxially fixed on the mounting disc, an arm frame is fixed on the mounting disc, and a ball groove is arranged at the front end of the arm frame. According to the broaching tool, the tow hook and the broaching tool can be quickly positioned, so that center hole spline broaching can be efficiently and accurately carried out on a large batch of tow hooks.

Description

TECHNICAL FIELD

[0001] The utility model relates to tool fixture technical field, in particular to a kind of broaching machine tooling for trailer hook pull spline. BACKGROUND

[0002] A trailer hook needs to be processed spline in center hole, because the whole trailer hook is arc arm, one end of arc arm is spline assembly, the other end of arc arm is ball type assembly, so, when assembling trailer hook with other fixed position components, the positioning of both ends of arc arm will affect each other, that is, ball type assembly will affect spline assembly, specifically, ball type assembly will affect spline shaft key tooth alignment when spline assembly is affected. Therefore, when processing spline in center hole of trailer hook, spline missing tooth position of broach needs to be matched, and ball end is positioned. SUMMARY

[0003] The utility model discloses a kind of broaching machine tooling for trailer hook pull spline, which uses journal and ball groove to quickly position trailer hook, to accurately broach center hole spline, and improve batch production efficiency.

[0004] The utility model discloses the technical scheme that the technical problem thereof adopts: a kind of broaching machine tooling for trailer hook pull spline, including with the installation disc of broaching machine and the auxiliary frame of positioning broach circumferential tooth position, the installation disc is coaxially fixed with positioning disc, the installation disc is fixed with arm support, the front end of the arm support is provided with ball groove.

[0005] Preferably, the back of the installation disc is provided with a shaft neck coaxially inserted into the broaching machine head hole, the shaft neck is provided with a circumferential positioning plate circumferentially positioned with the broaching machine head hole, the circumferential positioning plate is two half cylinders coaxially and with decreasing radius, the installation disc, the shaft neck and the circumferential positioning plate are coaxial.

[0006] Preferably, the installation disc is provided with a pressing plate pressing the center disc of trailer hook.

[0007] Preferably, the positioning disc is provided with a stepped shaft inserted into the center hole of trailer hook to coaxially position it.

[0008] Preferably, the stepped shaft is clearance fit with the trailer hook.

[0009] Preferably, the ball groove is provided at the top end of a cylinder, and the bottom of the cylinder is connected with the arm support by screws.

[0010] Preferably, the broach tail for processing spline is provided with a flattened positioning, the auxiliary frame includes a guide rail, the guide rail is slidably connected with a mounting plate through a sliding block, and the mounting plate is provided with a clamping block clamping the flattened positioning.

[0011] The utility model discloses a beneficial effect is: a kind of for trailer hook to pull spline's broaching tool, it includes with the installation disc and the auxiliary frame of the positioning broach circumferential tooth position of installation of drawbench, the installation disc is coaxially fixed with positioning disc, the installation disc is fixed with arm support, the front end of the arm support is provided with ball groove.The utility model can position trailer hook and broach quickly, thereby efficiently, accurately to the center hole spline broaching of large quantities of trailer hook. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a kind of for trailer hook to pull spline's broaching tool of the utility model three-dimensional view;

[0013] Figure 2 It is a kind of for trailer hook to pull spline's broaching tool of the utility model front view;

[0014] Figure 3 It is Figure 2 top view.

[0015] EXPLANATION OF REFERENCE NUMERALS:

[0016] 1-installation disc, 11-journal, 12-circumferential positioning plate, 2-auxiliary frame, 21-guide rail, 22-mounting plate, 23-clamp block, 3-positioning disc, 31-step shaft, 4-arm support, 5-ball groove, 6-flattening positioning. DETAILED DESCRIPTION

[0017] The utility model will be further explained in detail in connection with the drawings and specific embodiment, and is not to limit the scope of implementation of the utility model to this.

[0018] As Figures 1 to 3 shown, a kind of for trailer hook to pull spline's broaching tool of the utility model of this embodiment, by two parts, one part is used to position clamping trailer hook, another part cooperates broach positioning broach.The first part includes the installation disc 1 fixed in the drawbench head by bolt, in order to make the installation disc 1 with drawbench head coaxial, the installation disc 1 is provided with journal 11, in order to make the installation disc 1 fixed, after clamp positioning clamping trailer hook, make the spline that it processes meet the tooth position requirement, the journal 11 is provided with circumferential positioning plate 12, the circumferential positioning plate 12 is two half cylinders of same shaft and radius decrease, to be positioned the circumferential of installation disc 1 after drawbench head clamp and.

[0019] The installation disc 1 is fixed with arm support 4, the front end of the arm support 4 is fixed with cylinder by screw, and the top end of cylinder is provided with ball groove 5 that can be combined with trailer hook ball joint.

[0020] The installation disc 1 is coaxially provided with a positioning disc 3 and is fixed by screws, the positioning disc 3 is provided with a stepped shaft 31, can be inserted into the center hole clearance fit of the trailer hook, so that the center hole of the trailer hook is coaxial with the positioning disc 3, the installation disc 1 and the broach of the broaching machine. The center of the installation disc 1 and the positioning disc 3 is provided with a through hole for facilitating the broach to pass through, which is larger than the center hole of the trailer hook.

[0021] Because the broach is long, the whole needs to pass through the hole to be machined during operation, and the broaching machine can only fix the broach and cannot position the broach in the circumferential direction, therefore, the auxiliary frame 2 is arranged in the embodiment, and the flat positioning 6 is arranged at the tail of the broach. The auxiliary frame 2 comprises a guide rail 21, the guide rail 21 is slidably connected with a mounting plate 22 through a sliding block, the mounting plate 22 is provided with a clamping block 23 clamping the flat positioning 6; so that the broach can be quickly positioned in the circumferential direction, and the broach is supported.

[0022] During operation, the center hole of the trailer hook is sleeved on the stepped shaft 31, the trailer hook is rotated, the spherical joint at the arm end of the trailer hook falls into the ball groove 5, then the center disc of the trailer hook is pressed by the pressing plate on the installation disc 1; the front end of the broach is inserted into the center hole of the trailer hook, and is circumferentially rotated, so that the tail of the broach is clamped into the clamping groove of the clamping block 23, and the broach is fixed by clamping the front end of the broach and the head of the broaching machine; the broaching machine is started, and the center hole of the trailer hook is broached.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and in order to facilitate the description of the technical solutions, the front, back, left, right, up, middle and down directions are set based on the drawings, which are not limited to the protection scope of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present application.

Claims

1. A broaching machine fixture for pulling splines on trailer hooks, characterized in that: The auxiliary frame is used for positioning the circumferential tooth position of broach, and comprises a mounting disc matched with a broaching machine and a positioning disc coaxially fixed on the mounting disc.

2. A drawbench tool for drawing the spline of a trailer hitch according to claim 1, characterised in that: The back of the mounting disc is provided with a shaft neck coaxially inserted into the hole of the broaching machine head, and the shaft neck is provided with a circumferential positioning plate circumferentially positioned with the hole of the broaching machine head.

3. A drawbench tool for drawing the key of a trailer coupling hook according to claim 1, characterised in that: The mounting disc is provided with a pressing plate for pressing the center disc of the trailer hook.

4. A drawbench tool for drawing the spline of a trailer hitch according to claim 1, characterised in that: The positioning disc is provided with a stepped shaft inserted into the center hole of the trailer hook to be coaxially positioned.

5. A drawbench tool for drawing the key of a trailer coupling according to claim 4, characterised in that: The stepped shaft is clearance fit with the trailer hook.

6. A drawbench tool for drawing the key of a trailer hitch according to claim 1, characterized in that: The ball groove is arranged at the top end of a cylinder, and the bottom of the cylinder is connected with the arm frame through a screw.

7. A drawbench tool for drawing the key of a trailer hitch according to claim 1, characterized in that: The broach tail for machining spline is provided with a flat positioning, the auxiliary frame comprises a guide rail, the guide rail is slidably connected with a mounting plate through a sliding block, and the mounting plate is provided with a clamping block for clamping the flat positioning.

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