CN204389294U - The limit-type uniaxial direct tensile sample fixing device of spring assembly - Google Patents
The limit-type uniaxial direct tensile sample fixing device of spring assembly Download PDFInfo
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- CN204389294U CN204389294U CN201520092774.1U CN201520092774U CN204389294U CN 204389294 U CN204389294 U CN 204389294U CN 201520092774 U CN201520092774 U CN 201520092774U CN 204389294 U CN204389294 U CN 204389294U
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- center position
- limit mechanism
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- annular bearing
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Abstract
The limit-type uniaxial direct tensile sample fixing device of spring assembly, be made up of down clamp and upper position fixture, down clamp comprises the lower sub be connected with testing machine bottom-loaded seat, the lower endcaps of fixing sample, the lower chain connecting lower sub and lower endcaps, the first volute spring, the first center position-limit mechanism and the second center position-limit mechanism; Upper position fixture comprises the top connection be connected with testing machine top-loaded seat, the upper end cap of fixing sample, the upper chain connecting top connection and upper end cap, the second volute spring, the 3rd center position-limit mechanism and the 4th center position-limit mechanism; Described first center position-limit mechanism, the second center position-limit mechanism, the 3rd center position-limit mechanism and the 4th center position-limit mechanism form by spring retainer assembly, support member and card extender; Spring retainer assembly comprises annular bearing, three screw rods, three with external thread and the swivel nut of internal thread, three limit spring and three limit bodies.
Description
Technical field
The utility model belongs to device hard brittle material being carried out to direct tensile test, particularly a kind of rock sample stationary installation supporting with testing machine in direct tensile test.
Background technology
Carrying out direct tensile test to rock sample is the Main Means obtaining Tensile Strength of Rock data.Sample fixing device supporting with testing machine in direct tensile test generally by position fixture and down clamp form, upper position fixture and down clamp include the joint be connected with testing machine, the end cap of fixing sample, the chain of jointing and end cap; Down clamp, due to the aliquot that will accept tension test and destroy and lower endcaps, also comprises the supporting member of rigid canister and backing plate composition.The sample fixing device of this kind of structure, because supporting member can not play effective supporting role in whole process of the test to sample and lower endcaps, thus can not carry out the test of the mechanics effect after peak stress.
CN200610022224.8 discloses a kind of spring thrust down clamp of direct tensile test, and the supporting member of down clamp in sample fixing device is designed to the combination of compression helical spring or compression helical spring and supporting plate.Although achieve the mechanics effect after directly testing rock fragile materials test peak stress like this, but still have the following disadvantages: in (1) test, the center line of compression helical spring does not easily overlap with the center line of testing machine, thus additional eccentric force can be formed to tested test specimen, affect the accuracy of test result; (2) because upper position fixture is different from the structure of down clamp, thus in test, test specimen two ends loading rigidity is inconsistent, causes tested rock to destroy suddenly, is not still very desirable to effective mechanics effect measured after peak stress; (3), when chain is connected with end cap, operation is very inconvenient.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, there is provided spring assembly limit-type uniaxial direct tensile sample fixing device, to guarantee in test that helical spring center line overlaps with the center line of testing machine and to load rigidity consistent at test specimen two ends, thus the mechanics effect after the accuracy of raising test result and more effective mensuration rock test peak stress.
The limit-type uniaxial direct tensile sample fixing device of spring assembly described in the utility model, be made up of with upper position fixture down clamp: described down clamp comprises the lower sub be connected with testing machine bottom-loaded seat, the lower endcaps of fixing sample, the lower chain connecting lower sub and lower endcaps, the first volute spring, the first center position-limit mechanism and the second center position-limit mechanism, and lower endcaps is made up of sample fixing and linkage section; Described upper position fixture comprises the top connection be connected with testing machine top-loaded seat, the upper end cap of fixing sample, the upper chain connecting top connection and upper end cap, the second volute spring, the 3rd center position-limit mechanism and the 4th center position-limit mechanism, and upper end cap is made up of sample fixing and linkage section; Described first center position-limit mechanism, the second center position-limit mechanism, the 3rd center position-limit mechanism are identical with the structure of the 4th center position-limit mechanism, form by spring retainer assembly, support member and card extender; Described spring retainer assembly comprises annular bearing, three screw rods, three with external thread and the swivel nut of internal thread, three limit spring and three limit bodies; The wall of described annular bearing is provided with three screws, the center line of three screws is all by the center of annular bearing, and the angle between the center line of adjacent screw is 120 °, the internal thread of three screws and the external thread of swivel nut match, the internal thread of described swivel nut and the external thread of described screw rod match, described limit body is provided with screw, and the internal thread of this screw and the external thread of screw rod match; One end of support member is connected with card extender, the other end is connected with the annular bearing in spring retainer assembly, three swivel nuts are arranged in three screws of annular bearing respectively, three screw rods combine with three swivel nuts respectively, three limit bodies are arranged on three screw rods respectively, three limit spring are set on three screw rods, and one end contacts with the limit body be arranged on screw rod, the contact internal walls of the other end and annular bearing; First center position-limit mechanism and testing machine bottom-loaded seat combine to be installed, in first center position-limit mechanism, the annular bearing of spring limit assembly and testing machine bottom-loaded seated connection touch, described lower sub is positioned at the center pit of described annular bearing, and in the first center position-limit mechanism, three screw rod one end of spring limit assembly contact with the lateral surface of lower sub respectively; Second center position-limit mechanism and lower endcaps combine installs, in second center position-limit mechanism, the annular bearing of spring limit assembly contacts with the sample fixing bottom outer wall of lower endcaps, the linkage section of lower endcaps is positioned at the center pit of described annular bearing, and in the second center position-limit mechanism, three screw rod one end of spring limit assembly contact with the lateral surface of lower endcaps linkage section respectively; First helical spring one end is connected with the card extender in the first center position-limit mechanism, the other end is connected with the card extender in the second center position-limit mechanism, the space that lower chain is positioned at the first center position-limit mechanism, the first volute spring, the second center position-limit mechanism surround; 3rd center position-limit mechanism and upper end cap combine installs, in 3rd center position-limit mechanism, the annular bearing of spring limit assembly contacts with the sample fixing bottom outer wall of upper end cap, the linkage section of upper end cap is positioned at the center pit of described annular bearing, and in the 3rd center position-limit mechanism, three screw rod one end of spring limit assembly contact with the lateral surface of upper end cap linkage section respectively; 4th center position-limit mechanism and testing machine top-loaded seat combine to be installed, in 4th center position-limit mechanism, the annular bearing of spring limit assembly and testing machine top-loaded seated connection touch, described top connection is positioned at the center pit of described annular bearing, and in the 4th center position-limit mechanism, three screw rod one end of spring limit assembly contact with the lateral surface of top connection respectively; Second helical spring one end is connected with the card extender in the 3rd center position-limit mechanism, the other end is connected with the card extender in the 4th center position-limit mechanism, the space that upper chain is positioned at the 3rd center position-limit mechanism, the second volute spring, the 4th center position-limit mechanism surround.
In the limit-type uniaxial direct tensile sample fixing device of the utility model institute spring assembly, support member in described first center position-limit mechanism, the second center position-limit mechanism, the 3rd center position-limit mechanism and the 4th center position-limit mechanism is four round bars, card extender is annular plate, and four round bars are evenly arranged on the anchor ring of annular bearing and card extender; Or the support member in described first center position-limit mechanism, the second center position-limit mechanism, the 3rd center position-limit mechanism and the 4th center position-limit mechanism be two xsects is the plate body of circular arc, card extender is annular plate, and two plate body symmetries are arranged on the anchor ring of annular bearing and card extender.
The utility model has following beneficial effect:
1, owing to being provided with volute spring and Liang Ge center position-limit mechanism in the down clamp of rock sample stationary installation described in the utility model and upper position fixture, thus can not only guarantee that in test, test specimen two ends loading rigidity is consistent, mechanics effect after more effective test rock test peak stress, and can guarantee that in test, helical spring center line overlaps with the center line of testing machine by the spring retainer assembly in the center position-limit mechanism of down clamp and upper position fixture, avoid the generation of additional eccentric force, not only increasing is success of the test rate, also help the accuracy improving test result.
2, be the plate body of circular arc because the support member in the first center position-limit mechanism, the second center position-limit mechanism, the 3rd center position-limit mechanism and the 4th center position-limit mechanism is four round bars or two xsects, thus when chain is connected with end cap, be convenient to insert web member latch, operate more simple and convenient, improve testing efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of the limit-type uniaxial direct tensile sample fixing device of spring assembly described in the utility model.
Fig. 2 is the first structural representation (support member is round bar) of the first center position-limit mechanism or the second center position-limit mechanism or the 3rd center position-limit mechanism or the 4th center position-limit mechanism in the limit-type uniaxial direct tensile sample fixing device of spring assembly described in the utility model, and described center position-limit mechanism is in off working state.
Fig. 3 is the vertical view of Fig. 2.
Fig. 4 is the second structural representation (support member is arc plate body) of the first center position-limit mechanism or the second center position-limit mechanism or the 3rd center position-limit mechanism or the 4th center position-limit mechanism in the limit-type uniaxial direct tensile sample fixing device of spring assembly described in the utility model, and described center position-limit mechanism is in running order.
Fig. 5 is the vertical view of Fig. 4.
In figure, 1-testing machine bottom-loaded seat, 2-spring retainer assembly, 2-1-annular bearing, 2-2-screw rod, 2-3-swivel nut, 2-4-limit spring, 2-5-limit body, 3-lower sub, 4-support member, 5-card extender, 6-lower chain, 7-lower latch, 8-lower endcaps, 9-rock sample, 10-upper end cap, 11-upper latch, 12-upper chain, 13-top connection, 14-testing machine top-loaded seat, the 15-the first volute spring, the 16-the second volute spring.
Embodiment
Below by embodiment, the limit-type uniaxial direct tensile sample fixing device of spring assembly described in the utility model is described further.
In the present embodiment, the limit-type uniaxial direct tensile sample fixing device of spring assembly as shown in Figure 1, is made up of down clamp and upper position fixture.Described down clamp comprise the lower sub 3 be connected with testing machine bottom-loaded seat 1, fixing sample lower endcaps 8, connect lower chain 6, first volute spring 15, first center position-limit mechanism, the second center position-limit mechanism of lower sub and lower endcaps, lower endcaps 8 is made up of sample fixing and linkage section, and the first volute spring 15 is cylinder measuring flume; Described upper position fixture comprises the top connection 13 be connected with testing machine top-loaded seat 14, the upper end cap 10 of fixing sample, upper chain 12, second volute spring 16 connecting top connection and upper end cap, the 3rd center position-limit mechanism and the 4th center position-limit mechanism, upper end cap 10 is made up of sample fixing and linkage section, and the second volute spring 16 is cylinder measuring flume.
Described first center position-limit mechanism, the second center position-limit mechanism, the 3rd center position-limit mechanism are identical with the structure of the 4th center position-limit mechanism, form, as shown in Figure 2 and Figure 3 by spring retainer assembly 2, support member 4 and card extender 5, spring retainer assembly 2 comprises annular bearing 2-1, three screw rod 2-2, three swivel nut 2-3 with external thread and internal thread, three limit spring 2-4 and three limit body 2-5, the wall of described annular bearing is provided with three screws, the center line of three screws is all by the center of annular bearing, and the angle between the center line of adjacent screw is 120 °, the internal thread of three screws and the external thread of swivel nut 2-3 match, the internal thread of described swivel nut 2-3 and the external thread of described screw rod 2-2 match, described limit body 2-5 is the nut matched with the external thread of screw rod 2-2, described limit spring 2-4 is cylinder measuring flume, support member 4 is four round bars, card extender 5 is annular plate, its external diameter is identical with annular bearing 2-1 with endoporus aperture, four round bars are evenly arranged on the anchor ring of annular bearing 2-1 and card extender 5, their one end is connected with card extender 5, and the other end is connected with the annular bearing 2-1 in spring retainer assembly, three swivel nut 2-3 are arranged in three screws of annular bearing respectively, three screw rod 2-2 combine with three swivel nuts respectively, three limit body 2-5 are arranged on three screw rods respectively, three limit spring 2-4 are set on three screw rods, and one end contacts with the limit body 2-5 be arranged on screw rod, the contact internal walls of the other end and annular bearing 2-1.
The array mode of each component of down clamp or assembly: the first center position-limit mechanism and testing machine bottom-loaded seat 1 combine to be installed, in first center position-limit mechanism, the annular bearing of spring limit assembly contacts with testing machine bottom-loaded seat 1, described lower sub 3 is positioned at the center pit of described annular bearing, and in the first center position-limit mechanism, three screw rod one end of spring limit assembly contact with the lateral surface of lower sub 3 respectively; Second center position-limit mechanism and lower endcaps 8 combine installs, in second center position-limit mechanism, the annular bearing of spring limit assembly contacts with the sample fixing bottom outer wall of lower endcaps 8, the linkage section of lower endcaps 8 is positioned at the center pit of described annular bearing, and in the second center position-limit mechanism, three screw rod one end of spring limit assembly contact with the lateral surface of lower endcaps linkage section respectively; One end of first volute spring 15 is connected with the card extender in the first center position-limit mechanism, the other end is connected with the card extender in the second center position-limit mechanism, the lower end of lower chain 6 is connected with the lower sub 3 be arranged on testing machine bottom-loaded seat 1, upper end is formed by lower latch 7 and lower endcaps linkage section and removably connects, the space that lower chain 6 is positioned at the first center position-limit mechanism, the first volute spring 15, second center position-limit mechanism surrounds.
The array mode of each component of upper position fixture or assembly: the 3rd center position-limit mechanism and upper end cap 10 combine installs, in 3rd center position-limit mechanism, the annular bearing of spring limit assembly contacts with the sample fixing bottom outer wall of upper end cap 10, the linkage section of upper end cap 10 is positioned at the center pit of described annular bearing, and in the 3rd center position-limit mechanism, three screw rod one end of spring limit assembly contact with the lateral surface of upper end cap linkage section respectively; 4th center position-limit mechanism and testing machine top-loaded seat 14 combine to be installed, in 4th center position-limit mechanism, the annular bearing of spring limit assembly contacts with testing machine top-loaded seat 14, described top connection 13 is positioned at the center pit of described annular bearing, and in the 4th center position-limit mechanism, three screw rod one end of spring limit assembly contact with the lateral surface of top connection 13 respectively; One end of second volute spring 16 is connected with the card extender in the 3rd center position-limit mechanism, the other end is connected with the card extender in the 4th center position-limit mechanism, the upper end of upper chain 12 is connected with the top connection 13 be arranged on testing machine top-loaded seat 14, lower end is formed by upper latch 11 and upper end cap linkage section and removably connects, the space that upper chain 12 is positioned at the 3rd center position-limit mechanism, the second volute spring 16, the 4th center position-limit mechanism surround.
As shown in Figure 1, two ends are bonding with the sample fixing of upper end cap 10 and lower endcaps 8 by high-strength plastic for the mounting means of rock sample 9.
It should be noted that, screw rod 2-2 in spring retainer assembly 2, swivel nut 2-3, limit spring 2-4, the mounting means of limit body 2-5 is: first combined with three screw rod 2-2 respectively by three swivel nut 2-3, then three screw rod 2-2 are inserted in three screws of annular bearing 2-1 respectively, three limit spring 2-4 being enclosed within respectively three screw rods is positioned in portion's section of annular bearing center pit again, three limit body 2-5 being arranged on respectively three screw rods is positioned in portion's section of annular bearing center pit, by regulating three limit bodies, three limit bodies are made all to be positioned at the end equidistant part of three screw rods in portion's section of ring body, three limit spring are in identical compressive state, by three swivel nuts, three screw rods are fixing on annular bearing again.
The utility model is not limited to above-described embodiment, such as, described first center position-limit mechanism, the second center position-limit mechanism, the 3rd center position-limit mechanism and the 4th center position-limit mechanism can also be the structures shown in Fig. 4, Fig. 5, namely support member 4 is two xsects is the plate body of circular arc, card extender 5 is annular plate, two plate body symmetries are arranged on the anchor ring of annular bearing 2-1 and card extender 5, their one end is connected with card extender 5, and the other end is connected with the annular bearing 2-1 in spring retainer assembly.
Claims (3)
1. the limit-type uniaxial direct tensile sample fixing device of spring assembly, be made up of down clamp and upper position fixture, described down clamp comprises the lower sub (3) be connected with testing machine bottom-loaded seat (1), the lower endcaps (8) of fixing sample, connect lower chain (6) and first volute spring (15) of lower sub and lower endcaps, lower endcaps (8) is made up of sample fixing and linkage section, described upper position fixture comprises the top connection (13) be connected with testing machine top-loaded seat (14), the upper end cap (10) of fixing sample, connect the upper chain (12) of top connection and upper end cap, upper end cap (10) is made up of sample fixing and linkage section, it is characterized in that down clamp also comprises the first center position-limit mechanism and the second center position-limit mechanism, upper position fixture also comprises the second volute spring (16), 3rd center position-limit mechanism and the 4th center position-limit mechanism,
Described first center position-limit mechanism, the second center position-limit mechanism, the 3rd center position-limit mechanism are identical with the structure of the 4th center position-limit mechanism, form by spring retainer assembly (2), support member (4) and card extender (5), described spring retainer assembly (2) comprises annular bearing (2-1), three screw rods (2-2), three swivel nuts (2-3) with external thread and internal thread, three limit spring (2-4) and three limit bodies (2-5), the wall of described annular bearing is provided with three screws, the center line of three screws is all by the center of annular bearing, and the angle between the center line of adjacent screw is 120 °, the external thread of the internal thread of three screws and swivel nut (2-3) matches, the internal thread of described swivel nut (2-3) and the external thread of described screw rod (2-2) match, described limit body (2-5) is provided with screw, the external thread of the internal thread of this screw and screw rod (2-2) matches, one end of support member (4) is connected with card extender (5), the other end is connected with the annular bearing (2-1) in spring retainer assembly, three swivel nuts (2-3) are arranged in three screws of annular bearing respectively, three screw rods (2-2) are combined with three swivel nuts respectively, three limit bodies (2-5) are arranged on three screw rods respectively, three limit spring (2-4) are set on three screw rods, and one end contacts with the limit body be arranged on screw rod, the contact internal walls of the other end and annular bearing (2-1),
First center position-limit mechanism and testing machine bottom-loaded seat (1) combine to be installed, in first center position-limit mechanism, the annular bearing of spring limit assembly contacts with testing machine bottom-loaded seat (1), described lower sub (3) is positioned at the center pit of described annular bearing, and in the first center position-limit mechanism, three screw rod one end of spring limit assembly contact with the lateral surface of lower sub (3) respectively; Second center position-limit mechanism and lower endcaps (8) combine installs, in second center position-limit mechanism, the annular bearing of spring limit assembly contacts with the sample fixing bottom outer wall of lower endcaps (8), the linkage section of lower endcaps (8) is positioned at the center pit of described annular bearing, and in the second center position-limit mechanism, three screw rod one end of spring limit assembly contact with the lateral surface of lower endcaps linkage section respectively; One end of first volute spring (15) is connected with the card extender in the first center position-limit mechanism, the other end is connected with the card extender in the second center position-limit mechanism, the space that lower chain (6) is positioned at the first center position-limit mechanism, the first volute spring (15), the second center position-limit mechanism surround;
3rd center position-limit mechanism and upper end cap (10) combine installs, in 3rd center position-limit mechanism, the annular bearing of spring limit assembly contacts with the sample fixing bottom outer wall of upper end cap (10), the linkage section of upper end cap (10) is positioned at the center pit of described annular bearing, and in the 3rd center position-limit mechanism, three screw rod one end of spring limit assembly contact with the lateral surface of upper end cap linkage section respectively; 4th center position-limit mechanism and testing machine top-loaded seat (14) combine to be installed, in 4th center position-limit mechanism, the annular bearing of spring limit assembly contacts with testing machine top-loaded seat (14), described top connection (13) is positioned at the center pit of described annular bearing, and in the 4th center position-limit mechanism, three screw rod one end of spring limit assembly contact with the lateral surface of top connection (13) respectively; One end of second volute spring (16) is connected with the card extender in the 3rd center position-limit mechanism, the other end is connected with the card extender in the 4th center position-limit mechanism, the space that upper chain (12) is positioned at the 3rd center position-limit mechanism, the second volute spring (16), the 4th center position-limit mechanism surround.
2. the limit-type uniaxial direct tensile sample fixing device of spring assembly according to claim 1, it is characterized in that the support member (4) in the first center position-limit mechanism, the second center position-limit mechanism, the 3rd center position-limit mechanism and the 4th center position-limit mechanism is four round bars, card extender (5) is annular plate, and four round bars are evenly arranged on the anchor ring of annular bearing (2-1) and card extender (5).
3. the limit-type uniaxial direct tensile sample fixing device of spring assembly according to claim 1, the support member (4) that it is characterized in that in the first center position-limit mechanism, the second center position-limit mechanism, the 3rd center position-limit mechanism and the 4th center position-limit mechanism is two xsects is the plate body of circular arc, card extender (5) is annular plate, and two plate body symmetries are arranged on the anchor ring of annular bearing (2-1) and card extender (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520092774.1U CN204389294U (en) | 2015-02-09 | 2015-02-09 | The limit-type uniaxial direct tensile sample fixing device of spring assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520092774.1U CN204389294U (en) | 2015-02-09 | 2015-02-09 | The limit-type uniaxial direct tensile sample fixing device of spring assembly |
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| CN204389294U true CN204389294U (en) | 2015-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520092774.1U Withdrawn - After Issue CN204389294U (en) | 2015-02-09 | 2015-02-09 | The limit-type uniaxial direct tensile sample fixing device of spring assembly |
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| CN (1) | CN204389294U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713774A (en) * | 2015-02-09 | 2015-06-17 | 四川大学 | Spring assembly limiting type rock specimen fixing device for direct tensile test |
-
2015
- 2015-02-09 CN CN201520092774.1U patent/CN204389294U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713774A (en) * | 2015-02-09 | 2015-06-17 | 四川大学 | Spring assembly limiting type rock specimen fixing device for direct tensile test |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150610 Effective date of abandoning: 20171114 |