CN207750459U - A kind of parallel variable pitch device of cam - Google Patents
A kind of parallel variable pitch device of cam Download PDFInfo
- Publication number
- CN207750459U CN207750459U CN201721652544.1U CN201721652544U CN207750459U CN 207750459 U CN207750459 U CN 207750459U CN 201721652544 U CN201721652544 U CN 201721652544U CN 207750459 U CN207750459 U CN 207750459U
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- CN
- China
- Prior art keywords
- cam
- bushing
- camshaft
- variable pitch
- pitch device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Valve-Gear Or Valve Arrangements (AREA)
- Gears, Cams (AREA)
Abstract
A kind of parallel variable pitch device of cam, including a camshaft, the camshaft surface are equipped with an at least cam track trace；Two bearing blocks, each bearing block connect with the both ends of camshaft and camshaft are made to be rotated around itself axis respectively；One guiding axis connects two bearing blocks；At least one transmission mechanism；Each transmission mechanism includes cam follower, shaft and the sliding block rotated along the slot bottom of a cam track trace, and the shaft is rolled with the cam follower and connected perpendicular to the guiding axis, one end of the shaft, and the other end of the shaft is connect with sliding block；Bushing, the bushing are wrapped in the guiding axis periphery, and the periphery of the bushing is connect with the inside of the sliding block；The cam follower drives the bushing to be moved along axis direction is oriented to；Fixed strip for fixing workpiece, the fixed strip are located at the lower section of the bushing.The utility model structure design is simple, and part is few, and precision is high, it is only necessary to periodically lubricate bushing, easy care maintenance.
Description
Technical field
The utility model is related to a kind of cam gear more particularly to a kind of parallel variable pitch devices of cam.Once to more
The application scenario that a product carries out range conversion can use the utility model, such as electronic assembly industry logical to improve production capacity
It is often single to multiple product operations, single multiple products is disposably picked and placeed from a position to another position.
Background technology
In equidistantly transformation occasion, linkage common at present has these types：Planar slot harden structure, cone pulley structure, even
Rod structure.
1. planar slot harden structure：As shown in Figure 1, 2, critical piece is planar cam mechanism, utilizes the track set
Realize displacement.
2. cone pulley structure：As shown in figure 3, its structure composition is concentric multigroup different-diameter belt wheel, the linear speed on belt wheel
Degree is linearly proportional with pulley diameters, and displacement is realized using the different linear velocities on belt.
3. link mechanism：As shown in figure 4, it is parallelogram mechanism that its structure forms substantially, multigroup parallel four side is utilized
Shape mechanism realizes displacement.
The prior art has the following problems：
1. planar slot harden structure：Structure is more complicated, volume
2. cone pulley structure：Precision is low, and structure is more complicated, and volume is bigger
3. link mechanism：Precision is low, complicated, and power performance is poor
Its advantage and disadvantage is as shown in the table：
Utility model content
To overcome the shortcomings of that the existing cam gear mentioned in background technology, the utility model provide a kind of cam flat
Row variable pitch device, it is simple in structure, small, kinematic accuracy is high.
The utility model is realized in this way：
A kind of parallel variable pitch device of cam, including：One camshaft, the camshaft surface are equipped with an at least cam locus
Line, each cam track trace are mutually parallel；Two bearing blocks, each bearing block connect with the both ends of camshaft and make cam respectively
Axis is rotated around itself axis；One guiding axis connects two bearing blocks；Transmission mechanism, the number of the transmission mechanism with it is described
Cam locus line number is identical, each transmission mechanism include along a cam track trace slot bottom rotate cam follower, shaft,
Sliding block and bushing, perpendicular to the guiding axis, one end of the shaft rolls with the cam follower and connects the shaft, described
The other end of shaft is connect with sliding block, and the bushing is wrapped in the guiding axis periphery, the periphery of the bushing and the sliding block
Inside connection, the cam follower drives the bushing to be moved along axis direction is oriented to；Fixed strip for fixing workpiece, institute
State the lower section that fixed strip is located at the bushing.
Using the technical program, the motion process of the utility model is：It is rotated by camshaft itself, drives cam follower edge
The slot bottom rotation of cam track trace, cam follower drives shaft along guiding axis side according to the corner design of cam track trace
To be moved with the bushing in movable slider along axis direction is oriented to；With realize the workpiece in the fixed strip below bushing along
The displacement of guiding axis moves.
As being further improved for utility model, bearing is equipped in the bearing block, the both ends of the camshaft lead to respectively
Bearing is crossed to connect with the bearing block.
Further include mounting base as being further improved for utility model, the mounting base is located at the top of two bearing blocks.
As being further improved for utility model, lubricant is equipped between the bushing and guiding axis.
As being further improved for utility model, it is even number that the displacement of the cam track trace, which connects number,.
As being further improved for utility model, it is odd number that the displacement of the cam track trace, which connects number,.
As being further improved for utility model, the path line is from one end of camshaft to other end displacement.
As being further improved for utility model, the cam track trace is from the centre of camshaft to both ends displacement.
Compared with prior art, the utility model has the beneficial effects that：The utility model has greatly in the following aspects
Improvement.
1. precision aspect：The precision of the utility model determines by the fit tolerance of bushing and guiding axis, repetitive positioning accuracy
It is codetermined by the fit tolerance and cam follower and camshaft of bushing and guiding axis, intermediate without motion transmission mechanism is eliminated
Median cumulative error.By selecting rational tolerance fit, reach high-precision requirement；
2. durable and precision stability：Bushing and guiding axis are using wear-resisting specially treated material (such as at 40Cr nitridations
Reason), reach abrasion resistant effect and ensures stable accuracy and the purpose that prolongs the service life；
3. maintainability：The utility model structure design is simple, and part is few, it is only necessary to periodically lubricate bushing, easy care is protected
It supports.
Description of the drawings
Fig. 1 is a kind of the first working state schematic representation of planar slot harden structure in the prior art.
Fig. 2 is a kind of second of working state schematic representation of planar slot harden structure in the prior art.
Fig. 3 is a kind of structural schematic diagram of cone pulley structure in the prior art.
Fig. 4 is a kind of structural schematic diagram of link mechanism in the prior art.
Fig. 5 is a kind of front view of the parallel variable pitch device of cam provided by the utility model.
Fig. 6 is a kind of internal structure front view of the parallel variable pitch device of cam provided by the utility model.
Fig. 7 is a kind of side view of the parallel variable pitch device of cam provided by the utility model.
Fig. 8 is the B-B sectional views of Fig. 7.
Fig. 9-12 is a kind of structural schematic diagram of camshaft provided by the utility model.
Figure 13 is cam curve performance plot.
Description of the drawings：1- camshafts, 2- cam track traces, 3- bearing blocks, 4- guiding axis, 5- transmission mechanisms, 6- cams turn
Son, 7- shafts, 8- sliding blocks, 9- bushings, 10- fixed strips, 11- bearings, 12- mounting bases, 13- baffles.
Specific implementation mode
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below in conjunction with the accompanying drawings and specifically
Embodiment further illustrates the utility model.
The parallel variable pitch device of a kind of cam as shown in figures 5-8, including a camshaft 1,1 surface of the camshaft are equipped with extremely
A few cam track trace 2, to the main member moved as parallel displacement.
Two bearing blocks 3, each bearing block 3 are connect with the both ends of camshaft 1 respectively, to make camshaft 1 around itself axis
Line rotates.
One guiding axis 4 connects two bearing blocks 3, to hang transmission mechanism 5.
Transmission mechanism 5, the number of the transmission mechanism 5 is identical as the number of the cam track trace 2, to by cam
Movement is transmitted on fixed strip 10.
Each transmission mechanism 5 includes cam follower 6, shaft 7 and the sliding block rotated along the slot bottom of a cam track trace 2
8, the shaft 7 is rolled with the cam follower 6 and is connected perpendicular to the guiding axis 4, one end of the shaft 7, the shaft 7
The other end connect with sliding block 8；Bushing 9, the bushing 9 are wrapped in 4 periphery of the guiding axis, the periphery of the bushing 9 and institute
State the inside connection of sliding block 8；The cam follower 6 drives the bushing 9 to be moved along 4 direction of guiding axis.
Fixed strip 10 for fixing workpiece, the fixed strip 10 are located at the lower section of the bushing 9.
Using the technical program, the motion process of the utility model is：It is rotated by camshaft 1 itself, drives cam follower 6
Rotated along the slot bottom of cam track trace 2, cam follower 6 according to the corner design of cam track trace 2 (cam angle with it is mobile away from
From in a linear relationship, see Figure 13), drive shaft 7 to be moved along 4 direction of guiding axis, to the bushing 9 in movable slider 8 along
4 direction of guiding axis moves；The workpiece in fixed strip 10 to realize 9 lower section of bushing is moved along the displacement for being oriented to axis direction 4.
Further, bearing 11 is equipped in the bearing block 3, the both ends of the camshaft 1 pass through bearing 11 and institute respectively
State the connection of bearing block 3.
Further, further include mounting base 12, the mounting base 12 is located at the top of two bearing blocks 3, to by this reality
It is mounted in other equipment with novel.
Further, due to relative motion frequent occurrence between bushing 9 and guiding axis 4, periodically the bushing 9 with
Lubricant is added between guiding axis 4 and carries out maintaining, to reduce abrasion between the two, improves service life.
Can also baffle 13 be set in the outside of camshaft 1, protective action is risen to camshaft 1.
Further, as described and depicted in figs. 9-13, according to actual condition needs, the displacement of the cam track trace 2 connects number can be with
It is designed as even number or odd number；The cam track trace 2 can be designed as from one end of camshaft to other end displacement or from
The centre of camshaft is to both ends displacement.Test is found, at the minimum spacing 8mm of cam track trace 2, width 30mm situations, this
The camshaft 1 used in embodiment at most may achieve 12 company's both sides displacement specifications.Pass through setting for the corner to cam track trace 2
Meter, may be implemented the equidistant transformation campaign of workpiece.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement etc., should be included in the utility model made by within the spirit and principle of utility model
Protection domain within.
Claims (8)
1. a kind of parallel variable pitch device of cam, which is characterized in that including：
One camshaft, the camshaft surface are equipped with an at least cam track trace, and each cam track trace is mutually parallel；
Two bearing blocks, each bearing block connect with the both ends of camshaft and camshaft are made to be rotated around itself axis respectively；
One guiding axis connects two bearing blocks；
Transmission mechanism, the number of the transmission mechanism is identical as the cam locus line number, each transmission mechanism include along
Cam follower, shaft, sliding block and the bushing of the slot bottom rotation of one cam track trace, the shaft is perpendicular to the guiding axis, institute
The one end and the cam follower for stating shaft roll connection, and the other end of the shaft is connect with sliding block, and the bushing is wrapped in
The guiding axis periphery, the periphery of the bushing are connect with the inside of the sliding block, and the cam follower drives the bushing edge
The movement of guiding axis direction；
Fixed strip for fixing workpiece, the fixed strip are located at the lower section of the bushing.
2. the parallel variable pitch device of cam according to claim 1, which is characterized in that be equipped with bearing, institute in the bearing block
The both ends for stating camshaft are connect by bearing with the bearing block respectively.
3. the parallel variable pitch device of cam according to claim 2, which is characterized in that further include mounting base, the mounting base
It is located at the top of two bearing blocks.
4. the parallel variable pitch device of cam according to claim 3, which is characterized in that be equipped between the bushing and guiding axis
Lubricant.
5. according to the parallel variable pitch device of claim 1-4 any one of them cams, which is characterized in that the cam track trace
It is even number that displacement, which connects number,.
6. according to the parallel variable pitch device of claim 1-4 any one of them cams, which is characterized in that the cam track trace
It is odd number that displacement, which connects number,.
7. according to the parallel variable pitch device of claim 1-4 any one of them cams, which is characterized in that the cam track trace from
One end of camshaft is to other end displacement.
8. according to the parallel variable pitch device of claim 1-4 any one of them cams, which is characterized in that the cam track trace from
The centre of camshaft is to both ends displacement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721652544.1U CN207750459U (en) | 2017-12-01 | 2017-12-01 | A kind of parallel variable pitch device of cam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721652544.1U CN207750459U (en) | 2017-12-01 | 2017-12-01 | A kind of parallel variable pitch device of cam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207750459U true CN207750459U (en) | 2018-08-21 |
Family
ID=63148026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721652544.1U Expired - Fee Related CN207750459U (en) | 2017-12-01 | 2017-12-01 | A kind of parallel variable pitch device of cam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207750459U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107989972A (en) * | 2017-12-01 | 2018-05-04 | 湖南新硕自动化科技有限公司 | A kind of parallel variable pitch device of cam |
-
2017
- 2017-12-01 CN CN201721652544.1U patent/CN207750459U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107989972A (en) * | 2017-12-01 | 2018-05-04 | 湖南新硕自动化科技有限公司 | A kind of parallel variable pitch device of cam |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180821 Termination date: 20201201 |
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| CF01 | Termination of patent right due to non-payment of annual fee |