Spinning installation structure for small automobile hub

Abstract

The invention discloses a small automobile hub spinning installation structure which comprises an equipment body, a transmission shaft, a tailstock and two forming dies, the transmission shaft and the tailstock are both installed on the equipment body, the two forming dies are installed on the transmission shaft and the tailstock respectively, and the transmission shaft is fixedly connected with the forming dies. A driving shaft of the tailstock is rotationally connected with the forming die, a guide through hole is formed in the forming die, an ejection assembly and an ejector pin head are arranged in the guide through hole, and the ejector pin head is pushed out of the guide through hole through the ejection assembly to abut against a center hole of a hub. A hand wheel on the tailstock is rotated to enable the forming die installed on the tailstock to be close to the hub, and the ejector pin head is pressed to return till the forming die abuts against the two sides of the hub respectively for clamping and fixing. According to the technical scheme, positioning is conducted through the movable ejector pin head, and the hub is clamped and fixed through the forming die.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of small car wheel hub spinning installation structure. BACKGROUND

[0002] Small car wheel hub is generally adopted forging structure, is completed by numerical control rough turning, finishing machining, and the blank of forging is relatively heavy, its processing difficulty is big, efficiency is low and cost is relatively high, so the existing scheme is replaced by spinning process, in the machining process of horizontal spinning machine, wheel hub is clamped by the forming die of being set in the both sides of horizontal spinning machine, the top of forming die is provided with the center head for controlling the both sides of wheel hub, in the process of installation, the forming die of one side is close to wheel hub by moving tailstock, after tailstock is close to wheel hub, center head is pressed in the center hole of boss of wheel hub by shaking hand wheel on tailstock, since the stress point of wheel hub clamping is concentrated in the center hole of boss, the damage of center hole size is easily caused. SUMMARY

[0003] In view of the defects in the prior art, the purpose of the present application is to provide a small car wheel hub spinning installation structure to avoid the stress concentration of wheel hub clamping in the center hole.

[0004] To achieve the above object, the present application provides the following technical scheme: a small car wheel hub spinning installation structure, comprising equipment main body, transmission shaft, tailstock, two forming dies, the transmission shaft and tailstock are installed on the equipment main body, two forming dies are installed on the transmission shaft and tailstock respectively, and the transmission shaft is fixedly connected with the forming die, the drive shaft of tailstock is rotatably connected with the forming die, the forming die is provided with a guide through hole, a knockout assembly and a center pin head are arranged in the guide through hole, the center pin head is pushed out of the guide through hole and abuts against the center hole of wheel hub through the knockout assembly, when the tailstock is moved to position, the forming die installed on the tailstock is close to wheel hub by rotating the hand wheel on the tailstock, the center pin head is pressed back until the forming die is abutted on both sides of wheel hub for clamping and fixing.

[0005] As a further improvement of the present application, the guide assembly comprises a base and a return spring, the base is installed on the side of the guide through hole away from the wheel hub, the return spring is installed between the center pin head and the base, the base is screw-connected in the guide through hole, and a polygonal hole for tool installation is arranged on the base.

[0006] As a further improvement of the present application, the side of the guide through hole facing the wheel hub is provided with an annular flange, a window for the center pin head to extend out is arranged on the annular flange, when the forming die abuts against the side surface of wheel hub, the side of annular flange close to wheel hub abuts against the boss on wheel hub.

[0007] As a further improvement of the present application, an annular protrusion is arranged on the center pin head, and the annular protrusion abuts against the inner wall of the guide through hole.

[0008] As a further improvement of the present application, the forming die is fixedly connected to the transmission shaft by bolts, and a plurality of the bolts are arranged along the circumference of the forming die.

[0009] As a further improvement of the present application, a bearing is arranged between the forming die and the driving shaft, the inner ring of the bearing is interference-fitted with the driving shaft, and the outer ring of the bearing is interference-fitted with the guide through hole.

[0010] As a further improvement of the present application, a step surface abutting against the side surface of the outer ring of the bearing is arranged on the forming die installed on one side of the driving shaft, and the driving shaft is provided with a limiting piece axially limiting the forming die and the bearing on the side of the driving shaft away from the forming die.

[0011] As a further improvement of the present application, the limiting piece is a shaft sleeve, and the driving shaft is provided with an annular groove for mounting the shaft sleeve.

[0012] As a further improvement of the present application, the shaft sleeve is composed of two half shells, and a pair of mounting ears are arranged on the half shells, and the mounting ears are arranged corresponding to each other and fixedly connected by a locking piece when the two half shells are mounted.

[0013] The present application has the following advantages: by arranging two forming dies respectively installed on the transmission shaft and the tail seat, cooperating with the ejector assembly and the ejector pin head in the guide through hole, after the tail seat is moved to the position, the forming die can be moved close to the hub by rotating the hand wheel, the ejector pin head first abuts against the center hole of the hub to realize preliminary positioning, and then is retracted under pressure to abut against the two sides of the hub to complete clamping and fixing, the positioning is accurate, the clamping stability is strong, the hub is effectively prevented from deviating during spinning processing, and the damage to the center hole of the hub is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a schematic diagram of the overall structure of the embodiment of the present application. Fig. 2 It is a schematic diagram of the clamping of the forming die of the embodiment of the present application.

[0015] The reference signs are as follows: 1, equipment main body; 2, transmission shaft; 3, tail seat; 4, forming die; 5, driving shaft; 6, guide through hole; 7, hand wheel; 8, ejector pin head; 9, base; 10, return spring; 11, annular flange; 12, boss; 13, annular protrusion; 14, step surface; 15, shaft sleeve. DETAILED DESCRIPTION

[0016] The present application will be further described in detail below with reference to the embodiments given in the accompanying drawings.

[0017] Reference Figs. 1-2As shown, a small car wheel hub spinning installation structure, including equipment body 1, transmission shaft 2, tailstock 3, two forming dies 4, transmission shaft 2 and tailstock 3 are installed on the equipment body 1, two forming dies 4 are installed on the transmission shaft 2 and tailstock 3 respectively, and the transmission shaft 2 is fixedly connected with the forming die 4, the driving shaft 5 of the tailstock 3 is rotatably connected with the forming die 4, the forming die 4 is provided with a guide through hole 6, a knockout assembly and a ejector pin 8 are arranged in the guide through hole 6, the ejector pin 8 is pushed out of the guide through hole 6 and abuts against the center hole of the wheel hub through the knockout assembly, when the tailstock 3 moves to the position, the forming die 4 installed on the tailstock 3 is made close to the wheel hub by rotating the hand wheel 7 on the tailstock 3, the ejector pin 8 is pressed back until the forming die 4 abuts against the two sides of the wheel hub respectively to clamp and fix. The transmission shaft 2 is installed on the equipment body 1 and driven by the motor to provide power, the tailstock 3 is slidably installed on the equipment body 1 through the slide rail, and is driven to move close to or away from the transmission shaft 2 along the length direction of the equipment body 1; the end of the transmission shaft 2 away from the equipment body 1 is fixedly connected with the forming die 4 to transmit the power of the motor, the end of the driving shaft 5 away from the tailstock 3 is rotatably connected with the other forming die 4, the driving shaft 5 can move linearly by rotating the hand wheel 7, so that the forming die 4 is close to the wheel hub, the center position of each forming die 4 is provided with a guide through hole 6, the knockout assembly and the ejector pin 8 are arranged in the guide through hole 6, under the action of the knockout assembly, the ejector pin 8 can extend out of the port of the guide through hole 6; in use, first abut the center hole of the small car wheel hub to be processed against the ejector pin 8 of the forming die 4 on the transmission shaft 2, then move the tailstock 3, so that the ejector pin 8 of the forming die 4 on the tailstock 3 abuts against the center hole of the wheel hub, at this time, the ejector pin 8 of the forming die 4 on the tailstock 3 has extended out of the guide through hole 6 under the action of the knockout assembly and abuts against the center hole of the wheel hub, realizing the preliminary centering of the wheel hub; then rotate the hand wheel 7 on the tailstock 3 to make the driving shaft 5 move towards the transmission shaft 2, and then make the forming die 4 on the tailstock 3 close to the wheel hub, in the process, the wheel hub generates axial pressure on the ejector pin 8, the ejector pin 8 is pressed back to the inside of the guide through hole 6 until the two forming dies 4 respectively fully abut against the two side faces of the wheel hub, at this time, the wheel hub is clamped and fixed by the two forming dies 4.

[0018] In order to further improve the convenience and stability of the ejection assembly, in an optional solution, the guide assembly includes a base 9 and a reset spring 10. The base 9 is installed on the side of the guide hole 6 away from the hub, and the reset spring 10 is installed between the needle head 8 and the base 9. The base 9 is screwed into the guide hole 6, and the base 9 is provided with a polygonal hole for tool installation. The inner wall of the end of the guide hole 6 away from the hub is provided with an internal thread, and the outer wall of the base 9 is provided with an external thread. The base 9 is screwed into the guide hole 6 through thread cooperation and fixed. The reset spring 10 is installed between the base 9 and the needle head 8, and one end of the reset spring 10 abuts against the base 9, and the other end abuts against the bottom of the needle head 8. The end of the base 9 away from the needle head 8 is provided with a polygonal hole, which can be matched with common tools such as an internal hexagonal wrench and an internal square wrench.

[0019] In order to better position the hub and limit the extension range of the needle head 8, the following further optimization can be selected. The side of the guide hole 6 facing the hub is provided with an annular flange 11, and the annular flange 11 is provided with a window for the needle head 8 to extend out of. When the forming die 4 abuts against the side of the hub, the side of the annular flange 11 close to the hub abuts against the boss 12 on the hub. The annular flange 11 is an annular structure integrally formed with the port of the guide hole 6, and the inner diameter of the annular flange 11 is smaller than the inner diameter of the guide hole 6, forming a window for the needle head 8 to extend out of. The inner diameter of the window is matched with the outer diameter of the needle head 8, so as to guide the extension direction of the needle head 8 and avoid the needle head 8 from being skewed when extending out. The two side surfaces of the hub close to the center hole are provided with annular bosses 12. When the forming die 4 abuts against the side of the hub, the end surface of the annular flange 11 facing the hub is tightly fitted with the end surface of the annular boss 12. On the one hand, the abutment of the annular flange 11 and the hub boss 12 improves the clamping stability, and on the other hand, the window of the annular flange 11 guides the needle head 8, ensuring that the needle head 8 always moves along the axial direction of the guide hole 6, improving the positioning accuracy. At the same time, the annular flange 11 can also prevent the needle head 8 from extending out of the guide hole 6 too much, preventing the needle head 8 from being bent and damaged due to excessive extension.

[0020] In some options, in order to limit the radial shaking of the needle head 8 in the guide hole 6 and improve the stability of the movement of the needle head 8, the needle head 8 is provided with an annular protrusion 13, and the annular protrusion 13 abuts against the inner wall of the guide hole 6. The annular protrusion 13 is an annular structure integrally formed with the outer wall of the needle head 8, and the outer diameter of the annular protrusion 13 is matched with the inner diameter of the guide hole 6. When the needle head 8 moves in the guide hole 6, the outer wall of the annular protrusion 13 always abuts against the inner wall of the guide hole 6, forming a sliding guide cooperation, avoiding the needle head 8 from shaking or skewing during movement, ensuring that the needle head 8 is always aligned with the center hole of the hub, and further improving the positioning reliability.

[0021] In order to enhance the firmness of the connection between the forming die 4 and the transmission shaft 2, the forming die 4 is fixedly connected to the transmission shaft 2 by bolts, and a plurality of bolts are arranged along the circumference of the forming die 4. The forming die 4 is uniformly provided with a plurality of bolt holes along the circumference, and the transmission shaft 2 is correspondingly provided with threaded holes, and the forming die 4 is fixedly connected to the transmission shaft 2 after the bolts are installed in the bolt holes.

[0022] In some options, a bearing is arranged between the forming die 4 and the driving shaft 5, the inner ring of the bearing is in interference fit with the driving shaft 5, and the outer ring of the bearing is in interference fit with the guide through hole 6. In this way, the forming die 4 on the side of the tailstock 3 is in rotational fit with the driving shaft 5 through the bearing.

[0023] In order to prevent the forming die from being axially displaced during clamping, in some options, a step surface 14 is arranged on the forming die installed on the side of the driving shaft, which is in abutment with the side surface of the outer ring of the bearing, and the side of the driving shaft away from the forming die is provided with a limiting piece for axially limiting the forming die and the bearing, the limiting piece is a shaft sleeve 15, the driving shaft is provided with an annular groove for installing the shaft sleeve 15, and the shaft sleeve 15 is composed of two half shells, and the half shells are provided with a pair of mounting ears, which are arranged correspondingly and fixedly connected by locking pieces when the two half shells are installed.

[0024] The arrangement of the step surface 14 and the limiting piece can effectively limit the axial displacement of the forming die and the bearing, avoid axial displacement of the forming die during clamping or rotational movement, and the annular groove on the driving shaft facilitates the installation and positioning of the shaft sleeve 15. In this embodiment, the shaft sleeve 15 is installed by two half shells and fixedly connected by mounting ears, which facilitates the disassembly and assembly of the shaft sleeve 15 and facilitates the maintenance in the later period.

[0025] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the scope of the present application shall be considered as falling within the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application shall also be considered as falling within the protection scope of the present application.

Claims

1. A small automobile wheel hub spinning mounting structure, characterized in that, The device includes a main body, a drive shaft, a tailstock, and two forming molds. The drive shaft and tailstock are both mounted on the main body, and the two forming molds are respectively mounted on the drive shaft and the tailstock. The drive shaft and the forming molds are fixedly connected, and the drive shaft of the tailstock is rotatably connected to the forming molds. The forming molds are provided with guide holes, and ejector components and ejector pins are provided in the guide holes. The ejector pins are pushed out of the guide holes through the ejector components and abut against the center hole of the hub. When the tailstock moves into position, the handwheel on the tailstock is rotated to move the forming molds mounted on the tailstock closer to the hub. The ejector pins are pressed back until the forming molds abut against both sides of the hub for clamping and fixing.

2. The small car wheel hub spinning mounting structure according to claim 1, characterized in that, The guide assembly includes a base and a return spring. The base is installed on the side of the guide hole away from the hub. The return spring is installed between the ejector pin and the base. The base is threaded into the guide hole. The base has a polygonal hole for tool installation.

3. The small car wheel hub spinning mounting structure according to claim 1 or 2, characterized in that, The guide hole has an annular flange on the side facing the hub. The annular flange has a window for the ejector pin to extend out. When the molding die abuts against the side of the hub, the side of the annular flange closest to the hub abuts against the boss on the hub.

4. The small car wheel hub spinning mounting structure according to claim 3, characterized in that, The ejector pin head is provided with an annular protrusion, which abuts against the inner wall of the guide hole.

5. The small car wheel hub spinning mounting structure according to claim 1, characterized in that, The molding die is fixedly connected to the drive shaft by bolts, and multiple bolts are arranged along the circumference of the molding die.

6. The small car wheel hub spinning mounting structure according to claim 1, characterized in that, A bearing is provided between the molding die and the drive shaft. The inner ring of the bearing is interference-fitted with the drive shaft, and the outer ring of the bearing is interference-fitted with the guide hole.

7. The small car wheel hub spinning mounting structure according to claim 6, characterized in that, The molding die installed on one side of the drive shaft has a stepped surface that abuts against the side of the outer ring of the bearing. The side of the drive shaft corresponding to the bearing away from the molding die has a limiting component that axially limits the molding die and the bearing.

8. The small car wheel hub spinning mounting structure according to claim 7, characterized in that, The limiting component is a bushing, and the drive shaft is provided with an annular groove for the bushing to be installed.

9. The small car wheel hub spinning mounting structure according to claim 8, characterized in that, The bushing consists of two half-shells, each half-shell having a pair of mounting ears. When the two half-shells are installed, the mounting ears are arranged correspondingly to each other and are fixedly connected by locking components.

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