CN203641430U

CN203641430U - Transmission mechanism with eccentric wheel instead of cam

Info

Publication number: CN203641430U
Application number: CN201420013992.7U
Authority: CN
Inventors: 许大新
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-01-10
Filing date: 2014-01-10
Publication date: 2014-06-11
Anticipated expiration: 2024-01-10

Abstract

A transmission mechanism with an eccentric wheel instead of a cam comprises the eccentric wheel, a guide sleeve, a sliding retractable guide rod, a connecting rod, a fixing seat, an L-shaped rack, a die holder, a riveting die and a punching die. The riveting die and the punching die are fixed on the die holder respectively. Through cooperation of the eccentric wheel and double springs as well as limiting devices, transmission of high and low positions of the eccentric wheel is realized; through compressing and releasing of the springs, displacement stop and slow movement are realized, and a stopping function of a smooth section between the high and the low positions of the eccentric wheel is achieved, so that the defect that linear-section output of the curved-surface cam is difficult to realize between high and low points is effectively overcome; the limiting devices are arranged at terminal positions of the dies, so that accurate positions of target points can be acquired, the defect of uniqueness of each position of the cam is overcome, and the eccentric wheel does not shed, bounce and vibrate in an eccentric-wheel jacket during high-speed operation; the transmission mechanism is low in noise, small in resistance and friction and easy to produce.

Description

A kind of eccentric wheel replaces the driving mechanism of cam

Technical field

The utility model belongs to mechanical transmissioning technology field, and what be specifically related to is the driving mechanism that a kind of eccentric wheel replaces cam.

Background technique

core component in cam drive is cam, or utilize the swing of curved surface, or turn round the push-and-pull transmission of realization to driven member by crank slot, due under the state of running up, can there is instantaneous disengaging cam profile because inertial force increases in driven member, generation is beated, and cause vibration, produce the skew of noise and actuator position, and all the time in some contact or a line contact condition, therefore, easily cause wearing and tearing, contour accuracy is had relatively high expectations, and makes manufacture cost high, the parameter of profile has determined the position of individual point, is difficult to realize the adjusting to height.

Summary of the invention

The purpose of this utility model is the deficiency for above technology, provides a kind of noise and resistance little, and friction is light, and the eccentric wheel that is easy to manufacture replaces the driving mechanism of cam.

The utility model is achieved through the following technical solutions: a kind of eccentric wheel replaces the driving mechanism of cam, is made up of eccentric wheel, guide sleeve, sliding extension guide rod, connecting rod, fixed base, L shaped tooth bar, mold base and the riveting die and the punching die that are separately fixed on mold base; Described eccentric wheel is arranged in eccentric wheel sleeve, and this eccentric wheel sleeve and guide sleeve connection are got up; In guide sleeve, be provided with square cavity, in square cavity, be provided with spring one; Sliding extension guide rod one end extend in guide sleeve and is connected with spring one is sheathed, and by pivot pin, sliding extension bar one end is fixed in guide sleeve, the other end of sliding extension guide rod couples together by pivot pin and connecting rod, and spring two is also installed between sliding extension guide rod and connecting rod, and this spring two is to be set on sliding extension guide rod; L shaped tooth bar is by screw and connecting rod connection, the gear of the transmission that is meshed with L shaped tooth bar, this gear also with mold base connection.

Described eccentric eccentric wheel is stretched the maximum moving distance of guide rod apart from being greater than to slide.

The downside position of described mold base is also provided with limit stoper, relatively fixing on the some position that mold base limits at limit stoper, is position, adjustable operation point and working stroke by regulation limiting device.

The beneficial effects of the utility model embody and are: compared with prior art, the utility model utilizes coordinating of eccentric wheel and dual spring and limit stoper, transmit eccentric push-and-pull displacement with the rigidity of spring, realize the transmission of eccentric wheel height position, with compression and the release of spring, realize stopping and slow-action of displacement, realize the only slow function of smooth section between eccentric wheel height, between height, be difficult to realize thereby effectively made up curved surface cam the defect that straightway is exported; And in structure, there is larger adaptability and modulability, by limit stoper being set in die terminal position, can obtain the position of accurate impact point, overcome the uniqueness of each point position on cam, while running up, eccentric wheel can not produce to depart from yet and beats and vibrate in eccentric wheel sleeve, and noise is little, and resistance is little, friction is light, is easy to manufacture.

Brief description of the drawings

Below in conjunction with accompanying drawing, the utility model is described in detail.

Fig. 1 is the utility model structural representation.

Following is the concrete title of each mark in figure: 1 eccentric wheel, 2 eccentric wheel sleeves, 3 guide sleeves, 4 pivot pins, 5 pads, 6 springs one, 7 springs two, 8 sliding extension guide rods, 9 pivot pins, 10 connecting rods, 11 fixed bases, 12 L shaped tooth bars, 13 screws, 14 riveting dies, 15 mold bases, 16 punching dies, 17 gears, 18 limit stoper.

Direction described herein is to be as the criterion with the placement direction of schematic diagram.

Embodiment

As shown in Figure 1, eccentric wheel replaces the driving mechanism of cam, by eccentric wheel 1, guide sleeve 3, sliding extension guide rod 8, connecting rod 10, fixed base 11, L shaped tooth bar 12 and mold base 15 and be separately fixed at riveting die 14 and punching die 16 on mold base 15 and form; Described eccentric wheel 1 is arranged in eccentric wheel sleeve 2 so that driving mechanism while running up eccentric wheel can in eccentric wheel sleeve, not produce to depart from and beat and vibrate; Eccentric wheel sleeve 2 gets up with guide sleeve 3 connections; In guide sleeve 3, be provided with square cavity 301, the interior mounting spring 1 of square cavity 301, is provided with pad 5 between spring 1 and square cavity 301 inwalls; Sliding extension guide rod 8 one end are to extend in guide sleeve 3 and the sheathed connection of described spring 1, make spring 1 on sliding extension guide rod 8, complete the flexible work of spring, and by pivot pin 4, sliding extension bar 8 one end are fixed in guide sleeve 3, the other end of sliding extension guide rod 8 couples together by pivot pin 9 and connecting rod 10, and between sliding extension guide rod 8 and connecting rod 10, spring 27 is also installed, spring 1 and spring 27 are to be respectively set on two of sliding extension guide rod 8; L shaped tooth bar 12 is by screw 13 and connecting rod 10 connections, the gear 17 of the transmission that is meshed with L shaped tooth bar 12, this gear 17 also with mold base 15 connections.

The downside position of described mold base 15 is also provided with limit stoper 18, as required, if while obtaining different positions, operation point and action time or stroke, only needs the position of regulation limiting device 18 to realize.

The process that the utility model is realized action is: in the time that eccentric wheel 1 rotates counterclockwise, guide sleeve 3 drives sliding extension guide rod 8 to move to left by spring 27, and thus, connecting rod 10 pulls L-type tooth bar 12 to move to left, now, L-type tooth bar 12 swings mold base 15 with gear 17 engagement driving along clockwise direction.

Adjust suitable limit stoper 18, be prevented from when mold base 15 is rocked to limit stoper 18 positions (being punching position) times, at this moment L-type tooth bar 12, connecting rod 10 and sliding extension guide rod 8 no longer move to left; Because the shift wheel of eccentric wheel 1 is apart from being greater than the throw of eccentric that sliding extension guide rod 8 moves to left, in the time that eccentric wheel 1 is rotated further, eliminated by spring 27 Compress Spring that continues to move to left, until the break point on eccentric wheel; And be not changed on the some position that mold base 15 limits at limit stoper 18, thereby realized the accurate control of this point always; In the time that eccentric wheel 1 continues to rotate counterclockwise, the decrement of spring 27 is discharged gradually, until guide sleeve 3 contacts with spring 1, and pull sliding extension bar 8, connecting rod 10 and L-type tooth bar 12 to move to right by spring 1 again, driven gear 17 swings in the counterclockwise direction with mold base 15, be prevented from until arrive the position of limit stoper 18, L-type tooth bar 12, connecting rod 10 and sliding extension guide rod 8 stop moving to right; Eccentric wheel 1 is rotated further hour offset amount and is eliminated by the compression of the spring 1 in guide sleeve 3, until another break point on eccentric wheel 1; The position that mold base 15 limits at limit stoper 18 is not also changed always, thereby has realized the accurate control of another point.

Two break points on eccentric wheel 1, all by the rigidity of spring, be delivered to target location, by the compression to spring and release, maintain the stable and time delay of target location, reserve time and the point of action of associated mechanisms action, thereby also just realized the propagation function of eccentric height and smooth section.

The above is preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications are also considered as protection domain of the present utility model.

Claims

1. eccentric wheel replaces the driving mechanism of cam, it is characterized in that: be made up of eccentric wheel, guide sleeve, sliding extension guide rod, connecting rod, fixed base, L shaped tooth bar, mold base and the riveting die and the punching die that are separately fixed on mold base; Described eccentric wheel is arranged in eccentric wheel sleeve, and this eccentric wheel sleeve and guide sleeve connection are got up; In guide sleeve, be provided with square cavity, in square cavity, be provided with spring one; Sliding extension guide rod one end extend in guide sleeve and is connected with spring one is sheathed, and by pivot pin, sliding extension bar one end is fixed in guide sleeve, the other end of sliding extension guide rod couples together by pivot pin and connecting rod, and spring two is also installed between sliding extension guide rod and connecting rod, and this spring two is to be set on sliding extension guide rod; L shaped tooth bar is by screw and connecting rod connection, the gear of the transmission that is meshed with L shaped tooth bar, this gear also with mold base connection.

2. a kind of eccentric wheel according to claim 1 replaces the driving mechanism of cam, it is characterized in that: eccentric eccentric wheel is stretched the maximum moving distance of guide rod apart from being greater than to slide.

3. a kind of eccentric wheel according to claim 1 replaces the driving mechanism of cam, it is characterized in that: the downside position of mold base is provided with limit stoper, relatively fixing on the some position that mold base limits at limit stoper, be position, adjustable operation point and working stroke by regulation limiting device.