Finishing device for movable pressure plate with pulley shaft of CVT gearbox

Abstract

The present invention provides a finishing device for a movable pressure plate of a pulley shaft of a CVT gearbox, which can solve the technical problem that the existing machining equipment has low efficiency in finishing the tooth grooves, outer cone surface and perforation of the movable pressure plate. The finishing device includes a workpiece conveying mechanism, a workpiece spindle, a tooth groove grinding mechanism, a perforation grinding mechanism and an outer cone surface grinding mechanism, and is characterized in that: the workpiece spindle is installed at the output end of the vertical conveying mechanism, the vertical conveying mechanism is installed at the output end of the horizontal conveying mechanism, and the workpiece spindle is installed with a clamp for clamping the column part of the movable pressure plate; the tooth groove grinding mechanism, the perforation grinding mechanism and the outer cone surface grinding mechanism are arranged below the horizontal conveying mechanism and arranged in sequence along the conveying direction of the horizontal conveying mechanism, and when the perforation grinding mechanism grinds the inner hole of the movable pressure plate, the outer cone surface grinding mechanism can grind the outer cone surface of the movable pressure plate synchronously.

Description

Technical Field

[0001] The invention relates to the technical field of machining parts of a CVT gearbox, and in particular to a finishing device for a movable pressing plate of a pulley shaft of a CVT gearbox. Background Art

[0002] A movable pressure plate of a CVT gearbox (input, output) with a pulley shaft, such as Figure 1 , Figure 2 As shown, it includes a conical cap P1, a column P2 connected to the lower end of the cap P1, and the movable pressure plate is provided with a stepped through hole that penetrates the cap P1 and the column P2 along the axial direction, wherein the through hole is located at the column P2 part to form a tooth groove P21. After the movable pressure plate is formed or rough-machined, it is necessary to fine-machine the tooth groove P21, the outer cone surface P11 of the cap P1 and the through hole P12. Traditional machining is to fine-machine the movable pressure plate through three different equipments. Since the movable pressure plate needs to be clamped repeatedly, not only the positioning accuracy cannot be guaranteed, the finishing quality is poor, but also the machining efficiency is low; although existing manufacturers also use multi-axis machining centers for machining, although the finishing quality can be guaranteed, the machining efficiency still needs to be further improved. Summary of the invention

[0003] The invention provides a finishing device for a movable pressure plate of a pulley shaft of a CVT gearbox, which can solve the technical problem that the existing machining equipment has low efficiency in finishing the tooth grooves, the outer cone surface of the cap and the perforation of the movable pressure plate.

[0004] The technical solution is as follows: a finishing device for a movable pressure plate of a pulley shaft of a CVT gearbox includes a workpiece conveying mechanism, a workpiece spindle, a tooth groove grinding mechanism, a perforation grinding mechanism and an outer cone grinding mechanism, and is characterized in that:

[0005] The workpiece conveying mechanism comprises a conveyor belt that performs a rotary motion in a horizontal plane, the conveyor belt is connected to a workpiece support base, and the movable pressing plate to be processed is supported on the workpiece support base in an upright manner with the cap facing downward;

[0006] The workpiece spindle is installed at the output end of the vertical conveying mechanism, the vertical conveying mechanism is installed at the output end of the horizontal conveying mechanism, and the workpiece spindle is installed with a fixture for clamping the column part of the movable pressure plate;

[0007] The tooth groove grinding mechanism, the perforation grinding mechanism and the outer cone grinding mechanism are arranged below the horizontal conveying mechanism and are arranged in sequence along the conveying direction of the horizontal conveying mechanism. When the perforation grinding mechanism grinds the inner hole of the movable pressure plate, the outer cone grinding mechanism can simultaneously grind the outer cone surface of the movable pressure plate.

[0008] Furthermore, the workpiece conveying mechanism is provided with a proximity switch and a limit cylinder at the pick-up and placement station of the movable pressure plate, and a stopper is provided at the end of the movable cover of the limit cylinder.

[0009] Furthermore, the workpiece support base is provided with a movable base plate and a fixed base plate. The movable base plate is elastically connected to the fixed base plate via springs on all sides. The middle part of the movable base plate is guided and cooperated with the fixed base plate via guide columns. The conveying mechanism is provided with a U-shaped bracket below the pick-up and placement station of the movable pressure plate. The U-shaped bracket is connected to the lifting cylinder and guided and cooperated with the cylinder support. The lifting cylinder is installed on the cylinder support.

[0010] The finishing device of the present invention can realize continuous processing of three parts of the workpiece by clamping the movable pressure plate once, without repeated clamping, and has high positioning accuracy. Moreover, the tooth groove grinding mechanism, the perforation grinding mechanism and the outer cone grinding mechanism are arranged in sequence along the conveying direction of the horizontal conveying mechanism. The inner hole and the outer cone surface of the movable pressure plate can be processed synchronously, which can effectively improve the processing efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic structural diagram from the first perspective of the movable pressure plate of the pulley shaft of the CVT transmission.

[0012] Figure 2 This is a schematic structural diagram of the movable pressure plate of the pulley shaft of the CVT transmission from a second perspective.

[0013] Figure 3 It is a schematic structural diagram of the present invention, wherein the workpiece spindle is located above the conveyor belt.

[0014] Figure 4 It is a schematic diagram of the structure of the present invention, wherein the workpiece spindle is located above the tooth groove grinding mechanism.

[0015] Figure 5 It is a schematic structural diagram of the present invention, wherein the workpiece spindle is located above the perforating and grinding mechanism.

[0016] Figure 6 It is a structural schematic diagram of the workpiece conveying mechanism of the present invention.

[0017] Figure 7 It is a partially enlarged structural schematic diagram of the workpiece conveying mechanism of the present invention. DETAILED DESCRIPTION

[0018] like Figure 3~Figure 7As shown, the finishing device of the movable pressure plate of the pulley shaft of the CVT gearbox includes a workpiece conveying mechanism 10, a workpiece spindle 20, a tooth groove grinding mechanism 50, a perforation grinding mechanism 60 and an outer cone grinding mechanism 70. The workpiece conveying mechanism 10 includes a conveyor belt that performs a rotary motion in a horizontal plane, and the conveyor belt is connected to a workpiece support base. The movable pressure plate P to be processed is supported on the workpiece support base in an upright manner with a cap facing downward;

[0019] The workpiece spindle 20 is installed at the output end of the vertical conveying mechanism 30, and the vertical conveying mechanism 30 is installed at the output end of the horizontal conveying mechanism 40. The workpiece spindle 20 is installed with a fixture for clamping the column part of the movable pressure plate. Specifically, the vertical conveying mechanism includes a vertical slide 31, a vertical slide rail 32 installed on the horizontal slide 41, a vertical screw nut pair and a vertical servo motor. The vertical slide 31 is guided by the vertical slide rail 32, driven by the vertical screw nut pair, and driven by the vertical servo motor. The horizontal conveying mechanism includes a horizontal slide 41, a horizontal slide rail 42 installed on the frame, a horizontal screw nut pair 43 and a horizontal servo motor. The horizontal slide 41 is guided by the horizontal slide rail 42, driven by the horizontal screw nut pair 43, and driven by the horizontal servo motor.

[0020] The tooth groove grinding mechanism 50, the perforation grinding mechanism 60 and the outer cone surface grinding mechanism 70 are arranged below the horizontal conveying mechanism 40 and are arranged in sequence along the conveying direction of the horizontal conveying mechanism 40. The grinding wheel axis of the perforation grinding mechanism 60 is vertically arranged, and the grinding wheel axis of the outer cone surface grinding mechanism 70 is inclined and the grinding end surface of the grinding wheel matches the conical surface of the cap of the movable pressure plate. By controlling the installation distance of the perforation grinding mechanism 60 and the outer cone surface grinding mechanism 70, when the perforation grinding mechanism 60 grinds the inner hole of the movable pressure plate, the outer cone surface grinding mechanism 70 can grind the outer cone surface of the movable pressure plate synchronously.

[0021] The workpiece conveying mechanism 10 is provided with a proximity switch 15 and a limit cylinder 16 at the pick-up and placement position of the movable pressure plate, and a stop block is provided at the end of the movable cover of the limit cylinder 16. When the workpiece support base reaches the pick-up and placement position, it is sensed by the proximity switch 15, and the controller controls the conveyor belt to stop running, and the piston rod of the limit cylinder 16 is extended to fix the workpiece support base; specifically, the workpiece support base is provided with a fixed base plate 111 and a movable base plate 112, and the middle part of the upper end surface of the movable base plate 112 is provided with a positioning column that cooperates with the movable pressure plate, and the lower end surface of the movable base plate 112 is elastically connected to the fixed base plate 111 through springs 113 around and guided by guide columns. The conveying mechanism is provided with a U-shaped bracket 12 below the pick-up and placement position of the movable pressure plate, and the top of the two side walls of the U-shaped bracket is provided with a conical positioning pin 121 that cooperates with the positioning block of the bottom wall of the fixed base plate, the U-shaped bracket 12 is connected to the lifting cylinder 13 and guided by the cylinder support 14, and the lifting cylinder 13 is installed on the cylinder support. When the workpiece spindle reaches the pick-and-place station, the lifting cylinder drives the U-shaped bracket 12 to rise. First, the U-shaped bracket 12 is positioned and matched with the fixed base plate 111 of the workpiece support base. Then, the U-shaped bracket, the workpiece support base and the workpiece are further raised until the column part of the workpiece extends into the fixture of the workpiece spindle and is clamped and fixed by the fixture. In this process, the workpiece is clamped by the fixture after being lifted. Since the movable base plate is elastically connected to the fixed base plate through a spring and guided by a guide column, the impact between the workpiece and the fixture can be reduced, ensuring the quality of the workpiece and extending the service life of the fixture.

Claims

1. A finishing device for a movable pressure plate of a pulley shaft of a CVT gearbox, comprising a workpiece conveying mechanism, a workpiece spindle, a tooth groove grinding mechanism, a perforation grinding mechanism and an outer cone grinding mechanism, characterized in that: The workpiece conveying mechanism comprises a conveyor belt that performs a rotary motion in a horizontal plane, the conveyor belt is connected to a workpiece support base, and the movable pressing plate to be processed is supported on the workpiece support base in an upright manner with the cap facing downward; The workpiece spindle is installed at the output end of the vertical conveying mechanism, the vertical conveying mechanism is installed at the output end of the horizontal conveying mechanism, and the workpiece spindle is installed with a fixture for clamping the column part of the movable pressure plate; The tooth groove grinding mechanism, the perforation grinding mechanism and the outer cone grinding mechanism are arranged below the horizontal conveying mechanism and are arranged in sequence along the conveying direction of the horizontal conveying mechanism. When the perforation grinding mechanism grinds the inner hole of the movable pressure plate, the outer cone grinding mechanism can grind the outer cone of the movable pressure plate synchronously. The workpiece support base is provided with a movable base plate and a fixed base plate. The movable base plate is elastically connected to the fixed base plate by springs on all sides. The middle part of the movable base plate is guided and matched with the fixed base plate by guide columns. The workpiece conveying mechanism is provided with a U-shaped bracket below the pick-up and place station of the movable pressure plate. The U-shaped bracket is connected to the lifting cylinder and guided and matched with the cylinder support. The lifting cylinder is installed on the cylinder support.

2. The finishing device for the movable pressure plate of the pulley shaft of the CVT transmission according to claim 1, characterized in that: The workpiece conveying mechanism is provided with a proximity switch and a limit cylinder at the pick-up and place station of the movable pressing plate, and a stopper is provided at the end of the movable cover of the limit cylinder.

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