CN115949711A - Connecting rod installation method and connecting rod capable of automatically adjusting length - Google Patents
Connecting rod installation method and connecting rod capable of automatically adjusting length Download PDFInfo
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- CN115949711A CN115949711A CN202211601762.8A CN202211601762A CN115949711A CN 115949711 A CN115949711 A CN 115949711A CN 202211601762 A CN202211601762 A CN 202211601762A CN 115949711 A CN115949711 A CN 115949711A
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- connecting rod
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- telescopic link
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a connecting rod mounting method and a connecting rod capable of automatically adjusting length. The connecting rod comprises a first connecting rod (1), a telescopic rod (2) and an elastic component (3), wherein the first connecting rod (1) and the telescopic rod (2) are respectively provided with a joint of a hinged moving component, and the first connecting rod (1) and the telescopic rod (2) are connected into a whole through the elastic component (3). The invention has the technical effects that: the problem that the connecting rod is positioned at the upper dead point and the lower dead point to generate touch is avoided, the length of the connecting rod can be automatically adjusted, and the sliding block can be converted into circular motion of the rotary table through reciprocating linear motion.
Description
Technical Field
The invention belongs to the field of transmission mechanisms, and particularly relates to a connecting rod mounting method and a transmission mechanism for converting reciprocating linear motion into circular motion.
Background
Compared with the traditional machining, the punching press (stamping press for short) has the advantages of high efficiency, material and energy conservation, low technical requirement on operators, capability of machining products which cannot be achieved, and wide application in various fields. Newly-increased complementary unit on the punching machine will turn into the carousel with the help of the reciprocal linear motion of punching machine slider and rotate, adopts conventional connecting rod mounting means, and connecting rod length is unchangeable, and connecting rod upper end head reciprocating motion's straight line is unanimous with the carousel central line that the end is connected under the connecting rod, then has following problem:
as shown in figure 1, the stroke of a slide block hinged with the upper end head of a connecting rod is set to be 2R, the stroke is the same as the diameter 2R of the circumferential track of the lower end head of the connecting rod, and the point a of the upper end head of the connecting rod moving along with the slide block 1 、b 1 、c 1 、d 1 8230the point a with reciprocating linear motion and lower end of connecting rod rotating with turntable 2 、b 2 、c 2 、d 2 8230the circular motion of connecting rod with its upper end at top dead center 1 Or bottom dead center t 1 When the lower end of the connecting rod is just positioned at the top point a on the circular track 2 Or lower vertex t 2 The action line of the force applied to the rotary disc by the connecting rod just passes through the axis of the rotary disc to generate touch, so that mechanical failure is caused.
Disclosure of Invention
The invention aims to solve the problems of connecting rod installation and provides a connecting rod installation method which can avoid the problem that a connecting rod is positioned at an upper dead center and a lower dead center and is dead-touched. The invention also provides a connecting rod capable of automatically adjusting the length, which can automatically adjust the length of the connecting rod and smoothly convert the reciprocating linear motion of the sliding block into the circular motion of the wheel disc.
In order to solve the technical problem, the invention provides a connecting rod mounting method, which comprises the following steps: the reciprocating stroke of the upper end of the connecting rod is equal to the diameter of the circumferential track of the lower end of the connecting rod, and the straight line segment of the reciprocating motion of the upper end of the connecting rod deviates from the vertical central line of the turntable connected with the lower end of the connecting rod.
Because the straight-line segment of the reciprocating motion of the upper end head of the connecting rod deviates from the vertical central line of the rotary table connected with the lower end head of the connecting rod, when the upper end head of the connecting rod reaches the reciprocating motion upper dead center (or lower dead center), the connecting rod deviates from the vertical central line of the rotary table, and the connecting rod obtains torque after applying force to the rotary table, thereby avoiding the occurrence of dead touch of the connecting rod motion.
However, under the condition that the straight-line segment of the reciprocating motion of the upper end of the connecting rod deviates from the vertical central line of the turntable connected with the lower end of the connecting rod, the turntable can not complete a complete circular motion and is in an asymmetric swing state, and the problem of asymmetric swing of the turntable is solved:
the invention also provides a connecting rod capable of automatically adjusting the length, which comprises a first connecting rod, a telescopic rod and an elastic component, wherein the first connecting rod and the telescopic rod are respectively provided with a joint for hinging the moving component, and the first connecting rod and the telescopic rod are connected into a whole through the elastic component.
Because the connecting rod can adjust the length of the connecting rod through the elastic component, the problem that the length of the existing connecting rod is unchanged to cause the asymmetric swing of the turntable is solved. The reciprocating linear motion of the punch press sliding block can be converted into the circular motion of the turntable through the connecting rod capable of automatically adjusting the length, and then the subsequent auxiliary mechanism is driven to operate.
The invention has the technical effects that:
the method avoids the problem that the connecting rod is dead-touched when being positioned at the upper dead point and the lower dead point, the connecting rod can automatically adjust the length of the connecting rod, and the reciprocating linear motion of the sliding block is converted into the circular motion of the rotary table.
Drawings
The drawings of the invention are illustrated as follows:
FIG. 1 is a diagram illustrating a prior art link assembly and movement;
FIG. 2 is a view of the present invention showing the installation and movement of the connecting rod;
FIG. 3 is a schematic view of a link structure with an automatically adjustable length;
FIG. 4 is a schematic structural diagram of an embodiment;
fig. 5 is a view for mounting and using the automatic length adjustment link.
In the figure, 1, a first connecting rod; 2. a telescopic rod; 3. an elastic member; 31. a first spring; 32. a second spring; 4. an outer sleeve; 5. adjusting the nut; 6. A second link; 8. a connecting rod with automatically adjusted length; 9. a turntable; 10. a pushing mechanism.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
for the clear description of the invention, the present patent application uses the terms "upper", "lower", "left", "right" and "vertical" for the distinction, which are determined according to the layout orientation of the above figures, and the orientation is changed in the practical use direction of the present invention, and the term orientation is changed accordingly, which should not be regarded as a limitation of the scope of patent protection.
As shown in fig. 2, the connecting rod installation method of the present invention is: the reciprocating stroke of the upper end of the connecting rod is equal to the diameter of the circumferential track of the lower end of the connecting rod, and the straight line segment of the reciprocating motion of the upper end of the connecting rod deviates from the vertical central line of the turntable connected with the lower end of the connecting rod. The included angle between the connecting rod and the vertical central line of the turntable between the top dead center of the reciprocating motion and the top point of the circular track is alpha, and the included angle alpha is called as a connecting rod deflection angle.
The straight line segment of the reciprocating motion of the upper end head of the connecting rod deviates from the vertical central line of the rotating disc connected with the lower end head of the connecting rod, and the upper end head of the connecting rod reaches the reciprocating motion top dead center a 1 (or bottom dead center t 1 ) The connecting rod is inclined to the vertical central line of the rotary table, and can obtain torque after applying force to the rotary table, so that the phenomenon that the force transferred by the connecting rod passes through the axis of the rotary table to be dead by touch is avoided.
As shown in FIG. 2, the link deflection angle is α, when the link swings to t at the lower left of the circular track (or the turntable) 2 When the point is on, the length of the connecting rod is insufficient and the connecting rod cannot reach t by bypassing the bottom of the circular track 3 And (4) point. In addition, when the connecting rod swings to the right side a above the circular track (or the turntable) 3 When the point is pointed, the length of the connecting rod is too long and cannot cross the top of the circular track to reach a 2 Therefore, the upper end of the connecting rod reciprocates up and down along with the sliding block, the rotating disc swings back and forth along with the lower end of the connecting rod only between the points a2 and t2 of the left circular arc or between the points t3 and a3 of the right circular arc, the swinging state of the rotating disc is called asymmetric swinging, and the rotating disc cannot complete a complete circular motion. T not spanned by connecting rods 2 t 3 And a 3 a 2 The track arc is called the swing gap.
The larger the connecting rod deflection angle alpha is, the larger the swing gap is, and in order to ensure that the swing gap is smaller, the connecting rod can easily span the swing gap to drive the turntable to do circular motion and cannot be contacted to be dead, the preferred connecting rod deflection angle alpha is 5 to 10 degrees.
In the above-mentioned connecting rod installation method, in order to solve the problem that the reciprocating linear motion of the slider is converted into the circular motion of the rotating disc and overcome the problem of asymmetric swing of the rotating disc, the invention also provides a connecting rod capable of automatically adjusting the length, as shown in fig. 3, comprising a first connecting rod 1, an expansion link 2 and an elastic component 3, wherein the first connecting rod 1 and the expansion link 2 are respectively provided with a joint of a hinged motion component, and the first connecting rod 1 and the expansion link 2 are connected into a whole through the elastic component 3.
Because the elastic part 3 can contract and elongate in length under the action of external force, the length of the connecting rod is changed, and the automatic length adjustment is realized. The elastic component is a spring, a rubber body or a sealing cylinder.
From the connecting rod deflection angles, when the connecting rod deflection angle alpha is 5 to 10 degrees, t is arranged at the lower left of the circumferential track 2 t 3 Rotary pendulum gap and circumferential railA on the right side above the trace 3 a 2 The rotary pendulum has a small gap, and the deformation of the connecting rod required for changing the rotary pendulum into circular motion is small. The elastic coefficient or the elastic modulus of the elastic component 3 is large enough to ensure that the connecting rod has small deformation in the force transmission process, and simultaneously can provide micro deformation to fill up the gap of the upper and lower rotary pendulums to form circular rotation.
On the contrary, if the elastic coefficient of the elastic member 3 is small and the amount of deformation of the elastic member 3 due to the force is large, the link moves from the top dead center a when the link applies the force to the driving turntable 1 Pressing down the right circle compresses the elastic part 3 to shorten, and the length of the connecting rod is shortened. The connecting rod moves downwards to reach the bottom dead center t 1 The lower end of the connecting rod can not reach the circular arc track t 2 Point, the swing gap is enlarged; the connecting rod is again from the bottom dead center t 1 The rotating disc moves upwards instantly, because the rotating pendulum gap is large, the rotating disc cannot cross the rotating pendulum gap due to the fact that the rotating disc is still large, the connecting rod upwards pulls the rotating disc to turn back, the rotating disc still swings at one side, and circular motion cannot be finished.
Example (b):
spring is selected for use to elastomeric element, as shown in fig. 4, this embodiment includes first connecting rod 1, telescopic link 2, elastomeric element 3 and outer tube 4, elastomeric element 3 includes first spring 31 and second spring 32, outer tube 4 is the shoulder hole bobbin, the telescopic link 2 periphery that outer tube 4 overlaps, 2 left sections of telescopic link and the cooperation of 4 middle sections of outer tube, 2 middle sections undergauge of telescopic link and the cooperation of 4 right sections of outer tube, 1 threaded connection outer tube left section inner tube of first connecting rod, first spring 31 is equipped with to the clamp between 1 right-hand member face of first connecting rod and 2 left end faces of telescopic link, second spring 32 overlaps on 2 reducing section of telescopic link, press from both sides between telescopic link step and the inside closing-in cross-section of outer tube 4, 2 right sections of telescopic link stretch out outer tube 4, can be used to articulated moving part, also can connect other parts.
In the present embodiment, the elastic member 3 adopts a double spring formed by combining the first spring 31 and the second spring 32 to increase the elastic coefficient, and when the first spring 31 is compressed, the second spring 32 is in a stretched state; similarly, when the first spring 31 is stretched, the second spring 32 is in a compressed state, and the two springs work together to obtain an elastic coefficient 2 times that of a single spring. The first spring 31 and the second spring 32 are flat springs with large elastic coefficient, the number of effective turns of the two springs is 3-4, and the gap between the compressed springs is 1-2 mm.
In order to realize the moderate adjustment of the length of the connecting rod, as shown in fig. 4, the present embodiment further includes a second connecting rod 6 and an adjusting nut 5; the left rod section of the second connecting rod 6 is provided with a threaded long hole, the right section of the telescopic rod 2 extending out of the outer sleeve 4 is provided with two sections of threads, the front section of the threads are matched and connected with the threaded long hole of the second connecting rod 6, the rear section of the threads are provided with an adjusting nut 5, and the adjusting nut is screwed and locked on the left end surface of the second connecting rod 6. The adjusting nut 5 on the telescopic rod 2 can adjust the connecting rod to a proper length and then fix the connecting rod.
The operation process of the embodiment is as follows:
as shown in fig. 5, the first connecting rod 1 of the present embodiment is hinged to the rotating disc 9, and the second connecting rod 6 fixed to the telescopic rod 2 is hinged to the supporting plate on the sliding block.
When the punch press sliding block is positioned at the top dead center, the length of the connecting rod 8 is automatically adjusted to be deviated from 5 to 10 degrees to the right along the vertical direction, the shaft hole at the lower end of the first connecting rod 1 is installed on the top of the rotary table 9, and the shaft hole at the upper end of the second connecting rod 6 is connected with the supporting plate of the punch press sliding block. Starting the punching press, the punch press slide block starts to move downwards, the support plate drives the automatic length adjustment push rod 8 to move, the lower end head of the automatic length adjustment push rod 8 pushes the rotary table 9 to rotate anticlockwise due to the fact that the support plate is installed on the rotary table 9, the length of the push rod is almost unchanged due to the fact that the elastic coefficient of the double springs in the automatic length adjustment push rod 8 is large, and when the slide block reaches a bottom dead center, the lower end head of the automatic length adjustment push rod 8 is located at a lower left rotary swing notch t 2 t 3 Along with the inertia of rotation, the rotary table 9 continues to rotate, and the push rod 8 with the length automatically adjusted is slightly elongated and quickly goes over the rotary swing gap t 2 t 3 . The punch press sliding block starts to move upwards from the bottom dead center, the automatic length adjusting push rod 8 pulls the rotary table 9 to move upwards at the right side circle, the rotary table 9 is maintained to rotate anticlockwise, and when the self-sliding block reaches the top dead center, the lower end of the automatic length adjusting push rod 8 is located at the upper right rotary swing notch a 3 a 2 Along with the inertia of rotation, the push rod 8 with the automatic length adjustment is slightly compressed and quickly goes over the swing gap a 3 a 2 Punch press slideWhen the block reaches the top dead center and starts to move downwards, the turntable 9 rotates for a circle, and the swinging problem of the turntable swinging back and forth is solved.
The turntable 9 is connected with a main shaft of a pushing mechanism 10, the pushing mechanism 10 is provided with two bevel gear pairs, driven bevel gears of the two bevel gear pairs are respectively arranged on two shafts, each shaft is divided into two layers, an upper cam and a lower cam are respectively arranged on the two layers, two sets of goods conveying tongues are respectively arranged on the four cams on the two layers, and materials are pushed to enter the stacking mold.
Claims (7)
1. The utility model provides a connecting rod's mounting method, the stroke of connecting rod upper end reciprocating motion is equal with the diameter of the circumference orbit of connecting rod lower end, characterized by: the straight line segment of the reciprocating motion of the upper end of the connecting rod deviates from the vertical central line of the turntable connected with the lower end of the connecting rod.
2. The method of installing a connecting rod as set forth in claim 1, wherein: the deflection angle alpha of the connecting rod which reciprocates is 5 to 10 degrees.
3. A connecting rod capable of automatically adjusting length is characterized in that: the telescopic rod comprises a first connecting rod (1), a telescopic rod (2) and an elastic component (3), wherein the first connecting rod (1) and the telescopic rod (2) are respectively provided with a joint of a hinged moving component, and the first connecting rod (1) and the telescopic rod (2) are connected into a whole through the elastic component (3).
4. The automatic length adjustment connecting rod of claim 3, wherein: the elastic component (3) is a spring, a rubber body or a sealing cylinder.
5. The automatic length adjustment connecting rod according to claim 3 or 4, wherein: still include outer tube (4), elastomeric element (3) include first spring (31) and second spring (32), outer tube (4) are the shoulder hole bobbin, telescopic link (2) periphery of cover, telescopic link (2) left side section and outer tube (4) middle section hole cooperation, telescopic link (2) middle section undergauge and outer tube (4) right side section hole cooperation, first link (1) threaded connection outer tube (4) left side section inner tube, it is equipped with first spring (31) to press from both sides between first link (1) right-hand member face and telescopic link (2) left end face, second spring (32) cover is on telescopic link (2) reducing section, press from both sides between the inside binding off cross-section of telescopic link step and outer tube (4), telescopic link (2) right side section stretches out outer tube (4).
6. The automatic length adjustment connecting rod of claim 5, wherein: still include second connecting rod (6) and adjusting nut (5), threaded slot hole is opened to second connecting rod (6) left pole section, and the right section that outer tube (4) were stretched out in telescopic link (2) has two sections screws, and anterior segment screw thread is connected with second connecting rod (6) screw thread slot hole cooperation, and adjusting nut (5) are equipped with to the back end screw thread, and adjusting nut screws up the lock and pushes up in second connecting rod (6) left end face.
7. The automatic length adjustment connecting rod of claim 6, wherein: the first spring (31) and the second spring (32) are flat springs, the effective number of turns of the two flat springs is 3-4, and the gap between the compressed springs is 1-2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211601762.8A CN115949711A (en) | 2022-12-14 | 2022-12-14 | Connecting rod installation method and connecting rod capable of automatically adjusting length |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211601762.8A CN115949711A (en) | 2022-12-14 | 2022-12-14 | Connecting rod installation method and connecting rod capable of automatically adjusting length |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115949711A true CN115949711A (en) | 2023-04-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211601762.8A Pending CN115949711A (en) | 2022-12-14 | 2022-12-14 | Connecting rod installation method and connecting rod capable of automatically adjusting length |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115949711A (en) |
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2022
- 2022-12-14 CN CN202211601762.8A patent/CN115949711A/en active Pending
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