CN2669177Y - Primary-testing force change-over device of double Rockwell hardometer - Google Patents
Primary-testing force change-over device of double Rockwell hardometer Download PDFInfo
- Publication number
- CN2669177Y CN2669177Y CNU2003201229320U CN200320122932U CN2669177Y CN 2669177 Y CN2669177 Y CN 2669177Y CN U2003201229320 U CNU2003201229320 U CN U2003201229320U CN 200320122932 U CN200320122932 U CN 200320122932U CN 2669177 Y CN2669177 Y CN 2669177Y
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- cam
- counterweight
- rockwell
- counterweights
- primary
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Abstract
The utility model relates to a primary-testing force change-over device of a double Rockwell hardometer, mainly comprising a main shaft 13 and a lever 5. The upper part of the other end of the supporting point 5a of the lever is provided with a counterweight seat 3 having counterweights 1 controlled by a cam and a link mechanism at an ascending position and a descending position. The counterweights 1 disengage from the counterweight seat 3 when ascending, and the counterweights 1 are placed on the counterweight seat 3 when descending. The cam and the link mechanism controlling the positions of the counterweights are composed of an end surface cam 7, a fork rack 9 and a pair of connecting rods 4. The end surface cam 7 is fixedly arranged on a cam shaft 6, the operating curve of the end surface cam contacts with a block nail or a roller 8 at one end of the fork rack 9, and the other end of the fork rack 9 is supported at the lower end of the connecting rod 4. Since a load changing hand wheel is used for controlling the elevation of the connecting rod to control the loading of the counterweights, primary-testing force can be switched over stably. The primary-testing force change-over device of a double Rockwell hardometer has simple operation and stable work, overcoming the disadvantages of the existing products.
Description
Technical field
The utility model relates to a kind of sclerometer, specifically refers to the preliminary examination power switching device shifter of a kind of pair of Rockwell hardometer.
Background technology
Two Rockwell hardometeres are a kind of multi-functional sclerometers with test Rockwell's hardness and surface rockwell hardness function, because its simple operation, dual-use can reduce equipment cost, is subjected to client's welcome.During the test surfaces Rockwell's hardness, its preliminary examination power is 3kg, and during the test Rockwell's hardness, its preliminary examination power is 10kg, because the preliminary examination power of Rockwell's hardness and surface rockwell hardness is different, therefore must switch preliminary examination power.The switching of loosening or compress realization preliminary examination power of external some product utilization spring, but this mechanical property to spring requires very high.
Summary of the invention
The purpose of this utility model is the preliminary examination power switching device shifter that proposes a kind of pair of Rockwell hardometer, with one group of simple cam, linkage assembly, realizes the switching of the preliminary examination power of two Rockwell hardometeres easily, to overcome the shortcoming of prior art.
The preliminary examination power switching device shifter of a kind of pair of Rockwell hardometer of the present utility model, mainly comprise a main shaft 13, a lever 5, above the other end of the fulcrum 5a of described lever, be provided with a counterweight seat 3, have one by the control of cam, linkage assembly, have and rise and the counterweight 1 of two positions that descend at least, when this counterweight 1 rises with 3 throw off, during decline shelf rest on described counterweight seat 3.
The cam of described control counterweight position, linkage assembly are made up of an edge cam 7, a crotch 9, one pair of connecting rod 4, described edge cam 7 is installed on the camshaft 6, the working curve of edge cam contacts with the retaining nail or the roller 8 of crotch 9 one ends, and the other end holder of crotch 9 is in the lower end of described connecting rod 4.
The beneficial effects of the utility model are: simple to operation because the lifting by becoming lotus handwheel control link and then the loading of control counterweight realize the steady switching of preliminary examination power, and working stability, thus overcome the defective of existing product.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the present utility model;
Fig. 2 is the structural representation of preliminary examination power counterweight switching part;
Fig. 3 is that the A of Fig. 2 is to side view.
Among the figure: 1 counterweight, 3 counterweight seats, 4 connecting rods, 5 levers, 6 camshafts, 7 edge cams, 8 retaining nail or rollers, 9 crotch, 10 cam mountings, 11 conical gear, 12 handwheels, 13 main shafts.
Embodiment
Now in conjunction with the embodiments and accompanying drawing the utility model is described in further detail.
By Fig. 1, the load that is added on the main shaft 13 is applied on the test specimen by pressure head, forms preliminary examination power.Be provided with a counterweight seat 3 above the other end of the fulcrum 5a of lever 5, have one to have at least and rise and the counterweight 1 of two positions that descend, its position is by cam, linkage assembly control.Throw off with counterweight seat 3 when counterweight 1 rises, during decline shelf rest on described counterweight seat 3.When counterweight and the disengagement of counterweight seat, the preliminary examination power that is added on the main shaft is that the main shaft deadweight produces the gravity sum with lever; When counterweight was shelved on the counterweight seat, the gravity of counterweight just was loaded on the main shaft by lever, and affacted on the test specimen, and the preliminary examination power that at this moment is added on the main shaft is gravity and the counterweight acting force sum that main shaft deadweight, lever produce.Therefore control the whether loading of counterweight, can accomplish the switching of preliminary examination power simply.
By Fig. 2, Fig. 3, the cam of described control counterweight position, linkage assembly are made up of an edge cam 7, a crotch 9, one pair of connecting rod 4, described edge cam 7 is installed on the camshaft 6, the working curve of edge cam contacts with the retaining nail or the roller 8 of crotch 9 one ends, the other end holder of crotch 9 is in the lower end of described connecting rod 4, and when cam curve was horizontal crotch 9, connecting rod 4 held up described counterweight 1, counterweight 1 is thrown off with counterweight seat 3, and counterweight 1 is irrelevant with lever 5; When cam curve made crotch 9 sagging, counterweight 1 was shelved in the counterweight seat 3, and acts on the lever 5.As shown in Figure 3, crotch 9 holds up two connecting rods 4 from both sides, and connecting rod then holds up counterweight from both sides, guarantee stable working.
By Fig. 2, the lower end of described camshaft is provided with a pair of conical gear 11, is equipped with one and becomes lotus handwheel 12 on the angular wheel shaft of level.By rotating handwheel 12 rotating cam axles 6, just can change the position of cam work curve, thereby change the position of counterweight, realize the switching of preliminary examination power.
Claims (3)
1. the preliminary examination power switching device shifter of two Rockwell hardometeres, mainly comprise a main shaft, a lever, it is characterized in that above the other end of the fulcrum of described lever, being provided with a counterweight seat, have one by the control of cam, linkage assembly, have and rise and the counterweight of two positions that descend at least, throw off with the counterweight seat when this counterweight rises, during decline shelf rest on described counterweight seat.
2. according to the preliminary examination power switching device shifter of described pair of Rockwell hardometer of claim 1, the cam, the linkage assembly that it is characterized in that described control counterweight position are made up of an edge cam, a crotch, one pair of connecting rod, described edge cam is installed on the camshaft, the working curve of edge cam contacts with the retaining nail or the roller of crotch one end, and the other end holder of crotch is in the lower end of described connecting rod.
3. according to the preliminary examination power switching device shifter of claim 1 or 2 described pairs of Rockwell hardometeres, it is characterized in that the lower end of described camshaft is provided with a pair of conical gear, on the angular wheel shaft of level, be equipped with one and become the lotus handwheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2003201229320U CN2669177Y (en) | 2003-12-30 | 2003-12-30 | Primary-testing force change-over device of double Rockwell hardometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2003201229320U CN2669177Y (en) | 2003-12-30 | 2003-12-30 | Primary-testing force change-over device of double Rockwell hardometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2669177Y true CN2669177Y (en) | 2005-01-05 |
Family
ID=34439238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2003201229320U Expired - Fee Related CN2669177Y (en) | 2003-12-30 | 2003-12-30 | Primary-testing force change-over device of double Rockwell hardometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2669177Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743566A (en) * | 2013-12-28 | 2014-04-23 | 瓦房店轴承集团有限责任公司 | A closed eccentric wheel swing mechanism |
| CN105403473A (en) * | 2015-11-03 | 2016-03-16 | 毛国强 | Digital display Rockwell hardness tester |
-
2003
- 2003-12-30 CN CNU2003201229320U patent/CN2669177Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743566A (en) * | 2013-12-28 | 2014-04-23 | 瓦房店轴承集团有限责任公司 | A closed eccentric wheel swing mechanism |
| CN105403473A (en) * | 2015-11-03 | 2016-03-16 | 毛国强 | Digital display Rockwell hardness tester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |