CN109340080B - Cam mechanism, piston and magnetic refrigerator with same - Google Patents
Cam mechanism, piston and magnetic refrigerator with same Download PDFInfo
- Publication number
- CN109340080B CN109340080B CN201811257776.6A CN201811257776A CN109340080B CN 109340080 B CN109340080 B CN 109340080B CN 201811257776 A CN201811257776 A CN 201811257776A CN 109340080 B CN109340080 B CN 109340080B
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- Prior art keywords
- cam
- working
- axial displacement
- rotating shaft
- displacement adjusting
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- 230000007246 mechanism Effects 0.000 title claims abstract description 56
- 238000006073 displacement reaction Methods 0.000 claims abstract description 64
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 230000033001 locomotion Effects 0.000 claims description 9
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000001816 cooling Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/01—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being mechanical
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
- F04B49/123—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members by changing the eccentricity of one element relative to another element
- F04B49/125—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members by changing the eccentricity of one element relative to another element by changing the eccentricity of the actuation means, e.g. cams or cranks, relative to the driving means, e.g. driving shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H53/00—Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
- F16H53/02—Single-track cams for single-revolution cycles; Camshafts with such cams
- F16H53/04—Adjustable cams
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B21/00—Machines, plants or systems, using electric or magnetic effects
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
- F25B2321/002—Details of machines, plants or systems, using electric or magnetic effects by using magneto-caloric effects
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a cam mechanism, a piston and a magnetic refrigerator with the cam mechanism and the piston. The cam mechanism includes: the transmission mechanism comprises a rotating shaft and a bearing seat which is fixedly arranged, the bearing seat comprises a first bearing seat and a second bearing seat, and the rotating shaft is rotatably connected between the first bearing seat and the second bearing seat; the working cam is sleeved on the rotating shaft and driven to rotate by the rotating shaft, the working cam can move along the axis direction of the rotating shaft, the working face of the working cam comprises a convex part and a concave part, and the concave degree of the concave part gradually changes along the extending direction of the rotating shaft; and the axial displacement adjusting mechanism is connected with the working cam and is used for enabling the working cam to move along the axial direction of the rotating shaft. The cam mechanism of the invention enables the stroke of the piston to be adjusted according to the requirement, thereby enabling the cold output by the magnetic refrigerator to be adjusted according to the requirement, reducing the unnecessary cold output and saving more energy.
Description
Technical Field
The invention relates to a cam mechanism, in particular to a cam mechanism for driving a piston to do reciprocating motion so that the motion stroke of a piston rod can be changed and a piston with the cam mechanism.
Background
In the field of magnetic refrigeration, cam mechanisms are relatively widely used mechanisms. Generally, the cam mechanism is used to drive the piston rod to reciprocate. The stroke of the cam is fixed and the stroke of the piston rod is also fixed. During the working process of the mechanism, the stroke of the piston cannot be changed. This results in an invariable amount of cooling output from the magnetic refrigerator. In the use process of the user, the number of people in the room is continuously changed due to the continuous change of the external temperature, so that the required cooling capacity is always continuously changed. Whereas the cooling capacity of the output of a conventional magnetic refrigerator using a cam mechanism cannot be changed. Thus, the requirements of users are not satisfied. The cam is schematically shown in fig. 1 and 2, the working surface of the cam is not adjustable, and the stroke for driving the piston rod to reciprocate is fixed. Under the condition of constant cam rotating speed, the flow rate of the heat exchange fluid pushed by the piston is constant, so that the output cold quantity is also constant.
Disclosure of Invention
The invention provides a cam mechanism and a piston driven by the cam mechanism and with a variable stroke, aiming at the problem that the stroke of a piston rod in the existing piston is fixed.
When the piston of the prior art is applied to a magnetic refrigerator, the magnetic refrigerator has the following problems: the cold output by the magnetic refrigerator can be only constant and cannot be adjusted according to the needs; when the required cooling capacity is smaller, the magnetic refrigerator outputs a large amount of unnecessary cooling capacity, and the energy-saving effect is poor; when the required cooling capacity is large, the magnetic refrigerator can not meet the requirement of cooling capacity output. Therefore, the invention also provides a magnetic refrigerator with the piston.
The invention adopts the following technical means:
The present invention provides a cam mechanism comprising:
the transmission mechanism comprises a rotating shaft and a bearing seat which is fixedly arranged, the bearing seat comprises a first bearing seat and a second bearing seat, and the rotating shaft is rotatably connected between the first bearing seat and the second bearing seat;
The working cam is sleeved on the rotating shaft and driven to rotate by the rotating shaft, the working cam can move along the axis direction of the rotating shaft, the working face of the working cam comprises a convex part and a concave part, and the concave degree of the concave part gradually changes along the extending direction of the rotating shaft;
and the axial displacement adjusting mechanism is connected with the working cam and is used for enabling the working cam to move along the axial direction of the rotating shaft.
Still further, axial displacement adjustment mechanism, including axial displacement adjustment slider and axial displacement adjustment cam, axial displacement adjustment slider sets up in the both sides of working cam, and its one side links to each other with the working cam, and the opposite side is provided with the butt piece, the pivot is outside to axial displacement adjustment cam cover, and its one end and butt piece butt, the other end links to each other with the bearing frame, axial displacement adjustment slider can be with the synchronous axis direction motion of pivot of working cam, but can not rotate, axial displacement adjustment cam can with the synchronous rotation of pivot, but can not follow axial motion.
Further, the abutment is a slider roller.
Further, the point at the maximum profile of the working surface of the working cam extends in unison in the axial direction from the corner of the working camInitially, each contour point of the working surface of the working cam is gradually changed in the axial direction.
Further, along the extending direction of the rotating shaft, the working cam moves between a first limit position and a second limit position, and the variation trend of the sinking degree of the sinking part is gradually increased or gradually reduced.
Still further still include the anti-self-rotation pin, the one end of anti-self-rotation pin is fixed in on the bearing frame, and the other end is followed on the axial displacement adjustment slider free pass.
Further, the axial displacement adjusting cam is cylindrical, and the working surface of the axial displacement adjusting cam is a smooth curved surface with the highest point and the lowest point which are spaced apart.
Further, the highest points are flush with each other and the lowest points are flush with each other.
Still further, the smooth curved surface includes 3 highest points and 3 lowest points.
Further, the axial displacement adjusting cams are symmetrically arranged on two sides of the working cam, the highest point of one side of the axial displacement adjusting cams is opposite to the lowest point of the other side of the axial displacement adjusting cams, and the lowest point of one side of the axial displacement adjusting cams is opposite to the highest point of the other side of the axial displacement adjusting cams.
Furthermore, the rotating shaft is connected with the bearing seat through a thrust bearing, and the rotating shaft is axially positioned through a shaft shoulder.
Further, the axial displacement adjusting cam is connected with the bearing seat through a thrust bearing, and is axially positioned through the flange of the cam.
Further, the axial displacement adjusting sliding block is connected with the working cam through a thrust bearing.
The invention also provides a piston, which comprises a piston cylinder and a piston rod, wherein the piston cylinder is fixed, one side of the piston rod is matched with the inner wall of the piston cylinder, the other side of the piston rod is contacted with the working surface of a working cam in the cam mechanism, and the working cam drives the piston rod to do reciprocating motion.
Further, the stroke of the piston rod when the working cam moves to the first limit position is S1, the stroke of the piston rod when the working cam moves to the second limit position is S2, and the stroke of the piston rod continuously changes from S1 to S2 along with the rotation of the rotating shaft.
The invention also provides a magnetic refrigerator comprising the piston.
The invention has the following beneficial effects:
In the cam mechanism of the present invention, the concave portion of the working curved surface of the working cam has a characteristic of gradually changing in the axial direction, and therefore, the stroke of the external mechanism working on the working curved surface of the working cam can be changed. When the external mechanism is a piston, an adjustable piston rod stroke is achieved. When the piston is applied to the magnetic refrigerator, the cold quantity output by the magnetic refrigerator can be adjusted according to the requirement, so that the magnetic refrigerator can reduce the unnecessary cold quantity output, and the energy is saved.
Drawings
FIG. 1 is a plan view of a conventional cam;
FIG. 2 is a schematic perspective view of a prior art cam;
FIG. 3 is a cross-sectional block diagram of the cam mechanism and piston of the present invention;
FIG. 4 is a bottom view of the cam mechanism and piston of the present invention;
FIG. 5 is a side view of the cam mechanism and piston of the present invention;
fig. 6 is an isometric view of a cam mechanism and piston of the present invention.
The marks in the figure: 1. a first bearing seat; 2. a first thrust bearing; 3. an axial displacement adjustment cam; 4. a slider roller; 5. an axial displacement adjusting slide block; 6. a second thrust bearing; 7. a working cam; 8. a third bearing seat; 9. an anti-self-rotation pin; 10. a rotating shaft; 11. a second bearing seat; 12. a third thrust bearing; 13. a fixing bolt; 14. a piston rod; 15. a piston cylinder; 16. an upper contact point; 17. a lower contact point; 18. a motor connecting end; 19. an upper limit position; 20. lower extreme position.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
The invention provides a cam mechanism, which aims at solving the problem that the stroke of a piston rod in the existing piston is fixed. The mechanism comprises: the transmission mechanism comprises a rotating shaft and a bearing seat which is fixedly arranged, the bearing seat comprises a first bearing seat and a second bearing seat, and the rotating shaft is rotatably connected between the first bearing seat and the second bearing seat; the working cam is sleeved on the rotating shaft and driven to rotate by the rotating shaft, the working cam can move along the axis direction of the rotating shaft, the working face of the working cam comprises a convex part and a concave part, and the concave degree of the concave part gradually changes along the extending direction of the rotating shaft; and the axial displacement adjusting mechanism is connected with the working cam and is used for enabling the working cam to move along the axial direction of the rotating shaft.
In the cam mechanism of the present invention, the concave portion of the working curved surface of the working cam has a characteristic of gradually changing in the axial direction, and therefore, the stroke of the external mechanism working on the working curved surface of the working cam can be changed. When the external mechanism is a piston, an adjustable piston rod stroke is achieved. When the piston is applied to the magnetic refrigerator, the cold quantity output by the magnetic refrigerator can be adjusted according to the requirement, so that the magnetic refrigerator can reduce the unnecessary cold quantity output, and the energy is saved.
Example 1
The present embodiment provides a cam mechanism as shown in fig. 3. The mechanism mainly comprises: the device comprises an upper bearing seat 1, a first thrust bearing 2, an axial displacement adjusting cam 3, a slider roller 4, an axial displacement adjusting slider 5, a second thrust bearing 6, a working cam 7, a third bearing seat 8, an anti-self-rotation pin 9, a rotating shaft 10, a second bearing seat 11 and a third thrust bearing 12.
The first bearing seat (hereinafter referred to as an upper bearing seat 1) and the second bearing seat (hereinafter referred to as a lower bearing seat 11) are fixed on the box body, and two hole sites for installing the bearings are machined on the first bearing seat and the second bearing seat. The shaft 10 is mounted on a smaller hole site therein, and the shaft 10 is axially positioned by a shoulder and connected by a third thrust bearing 12, forming a drive shaft assembly. A pair of axial displacement adjustment cams 3 are mounted on the larger hole sites thereof, connected by a first thrust bearing 2 and axially positioned by the flange faces of the cams. The axial displacement adjustment cam 3 is then rotatable about the axis of the rotary shaft 10 and cannot move. The cam is in a thin-walled cylindrical shape, and the working surface of the cam is a smooth curved surface with 3 highest points and 3 lowest points (it should be noted that the working curved surface of the axial displacement adjustment cam 3 in the present invention can have any number of vertexes and any number of bottoms, and the present invention is exemplified by the case of only 3 highest points and 3 lowest points. The inner wall side and the outer wall side of the curved surface are mutually flush in the vertical direction. A pair of axial displacement adjustment sliders 5 are fixedly connected to the slider rollers 4 to form a pair of slider assemblies. One side of the slider assembly is mounted on the working surface of the axial displacement adjustment cam 3 by means of a slider roller 4. The two side end surfaces of the working cam 7 are respectively fixed with a third bearing seat 8, and the two bearing seats are connected by a fixing bolt 13 to realize fastening. The other side of the slider assembly is connected to the working cam 7 by means of a second thrust bearing 6 and a third bearing seat 8. The working cam 7 and the slider assembly are both free to rotate about the axis of the shaft 10, thanks to the second thrust bearing 6, without affecting each other. The piston cylinder 15 is fixed, one side of the piston rod 14 is matched with the inner wall of the piston cylinder 15, and the other side is contacted with the working surface of the working cam 7, so that the piston rod can be driven by the working cam 7 to do reciprocating motion. It should be noted that, the type of the bearing is not particularly limited in the present invention, and all the connectors capable of achieving the purpose of the present invention belong to the protection scope of the present invention, and the present invention is exemplified only by the bearing of a specific type such as a thrust bearing.
The construction of the working cam 7 is shown in fig. 4. The working cam 7 is sleeved on the rotating shaft 10 and driven by the rotating shaft 10 to rotate, and can freely slide along the axial direction of the rotating shaft 10. The points near the maximum profile of the working surface of the working cam 7 are axially uniform and identical. From cam angleInitially, each contour point of the cam working surface is gradually changed along the axial direction. Two different contour lines C1, C2 are thus formed at the two end limit positions of the cam surface. C2 has an initial rotation angle phi and a final rotation angle/>The radial displacement difference between the minimum contour point of C1 and the minimum contour point of C2 is S. As shown, when the piston is operating on the C1 curve of the cam, the stroke of the piston rod is S1, and when the piston is operating on the C2 curve of the cam, the stroke of the piston rod is S2. Obviously S2 > S1 and S2-s1=s. I.e. the cam moves from one end to the other, the stroke variation value of the piston is S. Since the contour point of the cam working surface is gradually changed along the axial direction, the stroke of the piston is gradually changed along the axial direction of the cam, and the maximum value of the change is S. The piston stroke can be freely adjusted within the S range.
As shown in fig. 5, the position of the piston cylinder is fixed, the bottom point of the axial displacement adjustment cam 3 at the lower end is in contact with the roller of the slider assembly (i.e., the lower contact point 17), and the apex of the axial displacement adjustment cam 3 at the upper end is in contact with the roller (i.e., the upper contact point 16). Obviously, the working cam 7 is in the lower extreme position at this time. And the piston rod 14 is operated at the upper end limit position of the working surface of the working cam 7, and the stroke thereof is S1. The lower end of the rotating shaft 10 is a motor connecting end 18 for connecting a stepping motor.
As shown in fig. 6, the axial displacement adjusting cams 3 at the upper and lower ends are driven by a stepping motor to rotate synchronously. When the axial displacement adjusting cam 3 rotates by an angle, the axial displacement adjusting slide block 5 is pushed under the action of the working curved surface of the axial displacement adjusting cam, the working cam 7 is pushed to move upwards for a certain distance, and the stroke of the piston rod 14 is also changed. Because the axial displacement adjusting slide block 5 and the working cam 7 are isolated by a thrust bearing, the working cam 7 can conveniently and freely move axially even in the process of rapid rotation. In addition, if the axial displacement adjusting slide block 5 rotates, the working cam 7 can move in an uncontrollable axial direction, and the use requirement is obviously not met. In order to prevent the axial displacement adjusting slide block 5 from rotating, the left and right ends of the axial displacement adjusting slide block 5 at the upper and lower ends are provided with rotation preventing pins 9, and the other ends of the rotation preventing pins are fixed on the bearing seat. When the axial displacement regulating cam 3 at the lower end rotates to the point where the apex is in contact with the slider roller 4, the bottom point of the axial displacement regulating cam 3 at the upper end is in contact with the slider roller 4 because the axial displacement regulating cams 3 at the both ends rotate synchronously. At this time, the working cam 7 is in the upper end limit position 19. The piston rod 14 operates at the lower end limit position 20 of the cam working surface, and its stroke becomes S2.
Finally, the free and continuous change of the piston rod stroke from S1 to S2 is realized, and the change range is S.
In summary, the present invention relates to a cam with a variable working profile, wherein a desired working stroke of a piston can be obtained by controlling the axial movement of the cam; the invention also relates to a mechanism for adjusting the axial movement of the cam, which can flexibly and simply enable the cam to move axially; the axial adjusting mechanism adopts a flexible connecting structure, and the adjusting cam and the mechanism are smoothly driven without dry friction.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. A cam mechanism, comprising:
The transmission mechanism comprises a rotating shaft and a bearing seat which is fixedly arranged, the bearing seat comprises a first bearing seat and a second bearing seat, and the rotating shaft is rotatably connected between the first bearing seat and the second bearing seat;
The working cam is sleeved on the rotating shaft and driven to rotate by the rotating shaft, the working cam can move along the axis direction of the rotating shaft, the working face of the working cam comprises a convex part and a concave part, and the concave degree of the concave part gradually changes along the extending direction of the rotating shaft;
The axial displacement adjusting mechanism is connected with the working cam and is used for enabling the working cam to move along the axial direction of the rotating shaft; the axial displacement adjusting mechanism comprises an axial displacement adjusting slide block and an axial displacement adjusting cam, wherein the axial displacement adjusting slide block and the axial displacement adjusting cam are arranged on two sides of the working cam, one side of the axial displacement adjusting slide block is connected with the working cam through a thrust bearing, the other side of the axial displacement adjusting slide block is provided with an abutting piece, the axial displacement adjusting cam is sleeved outside the rotating shaft, one end of the axial displacement adjusting cam is abutted with the abutting piece through a working surface, the other end of the axial displacement adjusting cam is connected with a bearing seat on the same side through the thrust bearing, the axial displacement adjusting slide block and the working cam can synchronously move along the axial direction of the rotating shaft but cannot rotate, and the axial displacement adjusting cam and the rotating shaft can synchronously rotate but cannot axially move; the working surface of the axial displacement adjusting cam is a smooth curved surface with the highest point and the lowest point which are spaced, the highest point of the axial displacement adjusting cam on one side is opposite to the lowest point of the axial displacement adjusting cam on the other side, and the lowest point of the axial displacement adjusting cam on one side is opposite to the highest point of the axial displacement adjusting cam on the other side.
2. The cam mechanism of claim 1, wherein the abutment is a slider roller.
3. The cam mechanism according to claim 1, wherein the points at the maximum profile of the working surface of the working cam extend in unison in the axial direction, each profile point of the working surface of the working cam varying gradually in the axial direction from the rotational angle Φ of the working cam.
4. The cam mechanism according to claim 1, wherein the working cam moves between a first limit position and a second limit position in the direction of extension of the rotation shaft, and the degree of depression of the depression is gradually increased or gradually decreased.
5. The cam mechanism of claim 1, further comprising an anti-self-rotation pin having one end secured to the bearing housing and the other end free to pass through the axial displacement adjustment slider.
6. The cam mechanism of claim 1, wherein the axial displacement adjustment cam is cylindrical.
7. The cam mechanism of claim 1, wherein the highest points are flush with each other and the lowest points are flush with each other.
8. The cam mechanism of claim 1, wherein the smooth curved surface comprises 3 highest points and 3 lowest points.
9. A cam mechanism according to any one of claims 6 to 8, wherein the axial displacement adjustment cams are symmetrically disposed on either side of the working cam.
10. The cam mechanism of claim 1, wherein the shaft is coupled to the bearing housing via a thrust bearing and is axially positioned via a shoulder.
11. A piston comprising a piston cylinder and a piston rod, wherein the piston cylinder is stationary, one side of the piston rod being in engagement with the inner wall of the piston cylinder and the other side being in contact with the working surface of a working cam in a cam mechanism according to any one of claims 1 to 10, the working cam being driven in reciprocating motion.
12. The piston of claim 11 wherein the travel of the piston rod is S1 when the working cam moves to the first limit position and S2 when the working cam moves to the second limit position, the travel of the piston rod continuously varying from S1 to S2 as the shaft rotates.
13. A magnetic refrigerator comprising a piston as claimed in any one of claims 11 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811257776.6A CN109340080B (en) | 2018-10-26 | 2018-10-26 | Cam mechanism, piston and magnetic refrigerator with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811257776.6A CN109340080B (en) | 2018-10-26 | 2018-10-26 | Cam mechanism, piston and magnetic refrigerator with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109340080A CN109340080A (en) | 2019-02-15 |
| CN109340080B true CN109340080B (en) | 2024-04-26 |
Family
ID=65312032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811257776.6A Active CN109340080B (en) | 2018-10-26 | 2018-10-26 | Cam mechanism, piston and magnetic refrigerator with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109340080B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114909818B (en) * | 2022-07-18 | 2022-10-04 | 南方科技大学 | Tin separating and combining device for nuclear heat insulation demagnetization refrigeration system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06147106A (en) * | 1992-11-10 | 1994-05-27 | Seiko Seiki Co Ltd | Variable displacement type radial piston compressor |
| CN107503901A (en) * | 2017-07-25 | 2017-12-22 | 中国民航大学 | Two-sided concave grooved cam reciprocating pump |
| CN209012014U (en) * | 2018-10-26 | 2019-06-21 | 珠海格力电器股份有限公司 | A kind of cam mechanism, piston and the magnetic refrigerator with it |
-
2018
- 2018-10-26 CN CN201811257776.6A patent/CN109340080B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06147106A (en) * | 1992-11-10 | 1994-05-27 | Seiko Seiki Co Ltd | Variable displacement type radial piston compressor |
| CN107503901A (en) * | 2017-07-25 | 2017-12-22 | 中国民航大学 | Two-sided concave grooved cam reciprocating pump |
| CN209012014U (en) * | 2018-10-26 | 2019-06-21 | 珠海格力电器股份有限公司 | A kind of cam mechanism, piston and the magnetic refrigerator with it |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109340080A (en) | 2019-02-15 |
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