CN210775074U - Strain control type direct shear apparatus high stability lever device - Google Patents
Strain control type direct shear apparatus high stability lever device Download PDFInfo
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- CN210775074U CN210775074U CN201921316142.3U CN201921316142U CN210775074U CN 210775074 U CN210775074 U CN 210775074U CN 201921316142 U CN201921316142 U CN 201921316142U CN 210775074 U CN210775074 U CN 210775074U
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- eccentric shaft
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- lever
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- 238000010008 shearing Methods 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000002689 soil Substances 0.000 claims description 6
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
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- 230000035945 sensitivity Effects 0.000 description 1
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Abstract
The utility model discloses a strain control type direct shear apparatus high stability lever device, which comprises a bottom plate, a stand column, a cross beam, an eccentric shaft seat upper seat, an eccentric shaft device and an eccentric shaft seat bottom plate; the eccentric shaft seat upper seat is fixed on the lower surface of the bottom plate; the upright posts penetrate through the bottom plate from two sides of the eccentric shaft seat upper seat, and the top ends of the upright posts are connected with two ends of the cross beam; the eccentric shaft device is positioned below the eccentric shaft seat upper seat and is in contact connection with the lower surface of the eccentric shaft seat upper seat; the bottom end of the upright post is connected with an eccentric shaft seat bottom plate, and is connected with an eccentric shaft device through the eccentric shaft seat bottom plate. The utility model discloses a eccentric shaft device, from mode axial bearing and eccentric axle bed upper bracket between the connection design, on the one hand after the pressurization, the eccentric shaft can be from adjusting the straightness accuracy, guarantee the straightness accuracy between eccentric shaft and the pressurization head, reduce relative error; on the other hand, the strain control type direct shear can stably slide in the process of automatically adjusting the verticality, and the stability of the whole instrument and the accuracy of a test structure are improved.
Description
Technical Field
The utility model relates to a geotechnical test instrument field especially relates to a high steadiness lever arrangement of strain control formula staight scissors appearance.
Background
The lever ratio device of the original strain control type direct shear apparatus is made of 2 bearings, and the lever ratio is 1: 12. Because the bearing is too large in size, the lever cannot be too long, and only the ratio of 1:12 can be adopted.
The prior device with the leverage ratio of 1:12 has the following disadvantages: 1. the precision of the matching holes matched with the 2 bearings cannot reach higher precision, so that the force application precision is influenced to a certain extent, the action ratio of the bearing assembly on an instrument is too large, and the bearing assembly has certain influence on the power of the instrument; 2. the lever swings too much on the instrument, and the stability is poor; 3. the weight mass is too large, and the labor intensity of operators is high; 4. the pressure verticality of the two pull rods cannot be compensated along with the change of the instrument, the sensitivity of the instrument is poor, and the resistance is large.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a high steadiness lever means of strain control formula staight scissors appearance, can solve the above-mentioned problem that current device exists.
In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a high steadiness lever means of strain control formula staight scissors appearance, includes: the eccentric shaft device comprises a bottom plate, an upright post, a cross beam, an eccentric shaft seat upper seat, an eccentric shaft seat device and an eccentric shaft seat bottom plate; the eccentric shaft seat upper seat is fixed on the lower surface of the bottom plate; the upright posts penetrate through the bottom plate from two sides of the eccentric shaft seat upper seat, and the top ends of the upright posts are connected with two ends of the cross beam; the eccentric shaft device is positioned below the eccentric shaft base upper seat and is in contact connection with the lower surface of the eccentric shaft base upper seat; the bottom end of the upright post is connected with the eccentric shaft seat bottom plate and is connected with the eccentric shaft device through the eccentric shaft seat bottom plate.
In a preferred embodiment of the present invention, the eccentric shaft device comprises an eccentric shaft seat, an eccentric shaft, a lever, a weight block and an adjusting screw; the top end of the eccentric shaft seat is in contact connection with the lower surface of the upper seat of the eccentric shaft seat, a deep groove ball bearing is mounted on the side wall of the eccentric shaft seat close to the upright post, and two ends of a main shaft of the eccentric shaft penetrate through the deep groove ball bearing to be connected with the bottom plate of the eccentric shaft seat; one end of the lever is arranged on the main shaft of the eccentric shaft, and the other end of the lever extends out of the eccentric shaft seat; one end of the adjusting screw rod is connected with the eccentric shaft, and the other end of the adjusting screw rod extends out of the eccentric shaft seat in the direction opposite to the lever; the balancing weight is installed on the adjusting screw.
In a preferred embodiment of the present invention, the eccentric shaft seat and the eccentric shaft seat upper seat are connected by 4 guiding connecting blocks, wherein two ends of the guiding connecting blocks respectively penetrate through the eccentric shaft seat and the eccentric shaft seat upper seat.
In a preferred embodiment of the present invention, the guiding connection block is a T-shaped structure with a large end and a small end, the large end of the guiding connection block penetrates through the eccentric shaft seat and the small end of the guiding connection block penetrates through the eccentric shaft seat.
In a preferred embodiment of the present invention, four plane needle roller bearings, 4, are further installed between the upper surface of the eccentric shaft seat and the lower surface of the eccentric shaft seat upper seat, and the plane needle roller bearings are located outside the guide connecting block and distributed in a rectangular shape.
In a preferred embodiment of the present invention, the eccentric shaft has a lever ratio of 1: 24.
In a preferred embodiment of the present invention, the other end of the lever is provided with a lifting lug, and a weight is suspended on the lifting lug.
In a preferred embodiment of the present invention, the bottom end of the eccentric shaft seat bottom plate is further installed with a self-adjusting axial bearing, the self-adjusting axial bearing is in an omega-shaped structure, and the two ends of the eccentric shaft are rotatably connected to the self-adjusting axial bearing after passing through the deep groove ball bearing.
In a preferred embodiment of the present invention, the lever device further comprises a pressure head, and the pressure head is installed at a middle portion of the cross beam.
In a preferred embodiment of the present invention, the lever device further comprises a cutting box, a connecting block, a steel ring and a fixing seat; the shearing box is placed on the bottom plate below the cross beam, and a soil sample to be tested is contained in the shearing box; one side of the shearing box is sequentially connected with the fixed seat through the connecting block and the steel ring; the fixing seat is fixed on the bottom plate.
The utility model has the advantages that: the utility model relates to a high steadiness lever device of strain control type staight scissors instrument, which ensures that the eccentric shaft can self-adjust verticality after the strain control type staight scissors instrument is pressurized, ensures the linearity between the eccentric shaft and the pressurizing head and reduces relative error through the eccentric shaft device, the self-adjusting axial bearing and the connection design between the eccentric shaft seat and the eccentric shaft seat upper seat; on the other hand, the strain control type direct shear can stably slide in the process of automatically adjusting the verticality, so that the stability of the whole instrument and the accuracy of a test structure are improved; the utility model has the advantages of 1:24 lever ratio design, half weight mass reduction, labor intensity reduction, one-way cost reduction and strong practicability.
Drawings
Fig. 1 is a schematic perspective view of a preferred embodiment of a high stability lever device of a strain-controlled direct shear apparatus according to the present invention;
FIG. 2 is a schematic side view of FIG. 1;
the parts in the drawings are numbered as follows: 1. the eccentric shaft bearing comprises an eccentric shaft bearing upper seat, 2. an eccentric shaft bearing seat, 3. an eccentric shaft, 4. a lever, 5. a balancing weight, 6. an adjusting screw rod, 7. a bottom plate, 8. a guide connecting block, 9. a deep groove ball bearing, 10. a lifting lug, 11. a cross beam, 12. an upright post, 13. a pressurizing head, 14. a flat plate straight plate needle roller bearing, 15. an eccentric shaft bearing bottom plate, 16. a self-adjusting axial bearing, 17. a weight, 18. a steel ring, 19. a shearing box, 20. a fixed seat and 21. a connecting block.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.
Referring to fig. 1 and 2, an embodiment of the present invention includes:
example 1
The utility model discloses a high steadiness lever means of strain control formula staight scissors appearance, the device adopt the lever to carry out structural improvement for the eccentric shaft of 1:24 under the condition that lever length is the same with prior art, have effectively reduced the weight quality, reach the national standard requirement.
Specifically, the utility model discloses a lever device includes: the device comprises a bottom plate 7, a vertical column 12, a cross beam 11, an eccentric shaft base upper seat 1, an eccentric shaft device, an eccentric shaft base plate 15, a pressurizing head 13, a shearing box 19, a steel ring 18, a fixed seat 20 and a connecting block 21.
The eccentric shaft seat upper seat 1 is fixed on the lower surface of the bottom plate 7; the eccentric shaft seat 2 is arranged on the lower surface of the eccentric shaft seat upper seat 1, the upright post 12 penetrates through the bottom plate 7 from two sides of the eccentric shaft seat upper seat 1, and the top end of the upright post is connected with two ends of the cross beam 11; the eccentric shaft device is positioned below the eccentric shaft seat upper seat 1 and is in contact connection with the lower surface of the eccentric shaft seat upper seat 1; the bottom end of the upright post 12 is connected with the eccentric shaft seat bottom plate 15, and is connected with the eccentric shaft device through the eccentric shaft seat bottom plate 15, so that the eccentric shaft device is stably connected below the eccentric shaft seat upper seat 1.
The eccentric shaft device comprises an eccentric shaft seat 2, an eccentric shaft 3, a lever 4, a balancing weight 5 and an adjusting screw 6; the top end of the eccentric shaft seat 2 is in contact connection with the lower surface of the eccentric shaft seat upper seat 1. Specifically, a guide connecting block 8 and a plane straight plate ball bearing 14 are arranged between the eccentric shaft seat 2 and the eccentric shaft seat upper seat 1, the guide connecting block 8 is of a T-shaped structure with a large end and a small end, the large end of the guide connecting block penetrates through the eccentric shaft seat upper seat 1, and the small end of the guide connecting block penetrates through the eccentric shaft seat 2; 4 guide connecting blocks 8 are arranged between the eccentric shaft seat 2 and the eccentric shaft seat upper seat 2; the number of the plane straight plate ball bearings 14 is 4, the plane straight plate ball bearings are respectively positioned between the upper surface of the eccentric shaft seat 2 and the lower surface of the eccentric shaft seat upper seat 1, positioned at the outer side of the guide connecting block and distributed in a rectangular shape. The rolling type sliding positioning between the eccentric shaft seat device and the eccentric shaft seat upper seat 1 is realized by installing the guide connecting block 8 and the plane straight plate ball bearing 14 between the eccentric shaft upper seat 1 and the eccentric shaft seat 2, so that the stable instrument and the smooth rolling after pressurization of the strain control type direct shear instrument are ensured on normal stress application.
The side wall of the eccentric shaft seat 2 close to the upright post 12 is provided with a deep groove ball bearing 9, and two ends of a main shaft of the eccentric shaft 3 penetrate through the deep groove ball bearing 9 to be connected with a bottom plate 15 of the eccentric shaft seat; one end of the lever 4 is arranged on the main shaft of the eccentric shaft 3, and the other end of the lever extends out of the eccentric shaft seat 2; one end of the adjusting screw rod 6 is connected with the eccentric shaft 3, and the other end of the adjusting screw rod extends out of the eccentric shaft seat 2 in the direction opposite to the lever 4; the balancing weight 5 is installed on the adjusting screw 6. The lever ratio of the eccentric shaft is 1: 24. By adopting the eccentric shaft device, the weight is reduced by adopting the eccentric shaft with the lever ratio of 1:24 on the premise of not changing the length of the lever, thereby being beneficial to reducing the working strength and meeting the requirements of national watch hands.
The bottom end of the eccentric shaft seat bottom plate 15 is also provided with a self-adjusting axial bearing 16, the self-adjusting axial bearing 16 is in an omega-shaped structure, and two ends of the main shaft of the eccentric shaft 3 penetrate through the deep groove ball bearing 9 and then are rotatably connected with the self-adjusting bearing 16. The connection between the eccentric shaft and the two upright rods 12 is realized through the self-adjusting axial bearing 16, so that the eccentric shaft can automatically adjust the verticality after the stress control type direct shear apparatus is pressurized, the linearity is ensured, and the relative error is reduced.
A lifting lug 10 is arranged at the other end of the lever 4, and a weight 17 is suspended on the lifting lug 10.
The pressurizing head 13 is arranged in the middle of the cross beam 11, the shearing box 19 is placed on the bottom plate 7 below the cross beam 11, a soil sample to be tested is contained in the shearing box, and the pressurizing head 13 applies acting force in the vertical direction to the soil sample; one side (namely the side which is opposite to the side applying the horizontal acting force) of the shearing box 19 is sequentially connected with the fixed seat 20 through the connecting block 21 and the steel ring 18; the fixing seat 20 is fixed on the bottom plate 7.
The utility model discloses a theory of operation does: when a shear test is carried out, weights with certain mass are additionally arranged at one end of the lever through the lifting ring, the lever can be fixed in the horizontal direction, so that the weights drive the lever downwards, and the lever drives the pressurizing head to generate downward acting force on a soil sample to be tested through serial linkage of the eccentric shaft, the upright post, the cross beam and the like; then applying a normal force F in the horizontal direction to the shearing box, wherein the normal force F pushes the shearing box to move forwards, so that shearing force for damaging the soil sample is generated; in the process, on one hand, the eccentric shaft device enables the eccentric shaft to automatically adjust the verticality through the action of the self-adjusting axial bearing, so that the linearity is ensured, and the relative error is reduced; on the other hand, through the design of the guide connecting block and the plane straight needle roller bearing between the eccentric shaft seat and the eccentric shaft upper seat, the eccentric shaft can realize stable sliding in the process of automatically adjusting the verticality, so that the stability of the strain control type direct shear apparatus is ensured, and the accuracy of the result is improved.
The utility model relates to a high steadiness lever means of strain control formula staight scissors appearance has following advantage:
1. the structure of the lever device is simplified by the design and use of the eccentric shaft device, the lever ratio of 1:24 reduces the weight mass by half compared with the lever ratio of 1:12, the labor intensity can be effectively reduced, and the national standard requirement is met;
2. the connection between the two vertical rods and the eccentric shaft is realized through the two self-adjusting axial bearings, the self-adjusting verticality of the eccentric shaft after pressurization is effectively ensured, the linearity between the eccentric shaft and the pressurization head is ensured, the relative error is reduced, and the testing accuracy is improved.
3. The four-positioning guide connecting block and the four-direction plane straight plate needle roller bearing are arranged between the eccentric shaft seat and the eccentric shaft seat upper seat to carry out lever tracking direction, so that the strain control type direct shear can stably move in the self-perpendicularity adjusting process, and the working stability of the whole instrument and the accuracy of a test result are improved.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a high steadiness lever means of strain control formula staight scissors appearance which characterized in that includes: the eccentric shaft device comprises a bottom plate, an upright post, a cross beam, an eccentric shaft seat upper seat, an eccentric shaft seat device and an eccentric shaft seat bottom plate; the eccentric shaft seat upper seat is fixed on the lower surface of the bottom plate; the upright posts penetrate through the bottom plate from two sides of the eccentric shaft seat upper seat, and the top ends of the upright posts are connected with two ends of the cross beam; the eccentric shaft device is positioned below the eccentric shaft base upper seat and is in contact connection with the lower surface of the eccentric shaft base upper seat; the bottom end of the upright post is connected with the eccentric shaft seat bottom plate and is connected with the eccentric shaft device through the eccentric shaft seat bottom plate.
2. The strain controlled direct shear apparatus high stability lever arrangement of claim 1, wherein the eccentric shaft arrangement comprises an eccentric shaft seat, an eccentric shaft, a lever, a counterweight and an adjusting screw; the top end of the eccentric shaft seat is in contact connection with the lower surface of the upper seat of the eccentric shaft seat, a deep groove ball bearing is mounted on the side wall of the eccentric shaft seat close to the upright post, and two ends of a main shaft of the eccentric shaft penetrate through the deep groove ball bearing to be connected with the bottom plate of the eccentric shaft seat; one end of the lever is arranged on the main shaft of the eccentric shaft, and the other end of the lever extends out of the eccentric shaft seat; one end of the adjusting screw rod is connected with the eccentric shaft, and the other end of the adjusting screw rod extends out of the eccentric shaft seat in the direction opposite to the lever; the balancing weight is installed on the adjusting screw.
3. The high stability lever apparatus of strain controlled direct shear of claim 2, wherein the eccentric shaft seat and the eccentric shaft seat upper seat are connected by 4 guiding connection blocks, wherein two ends of the guiding connection blocks respectively penetrate through the eccentric shaft seat and the eccentric shaft seat upper seat.
4. The high stability lever apparatus of claim 3, wherein the guiding connection block is a T-shaped structure with a large end and a small end, the large end of the guiding connection block penetrates through the eccentric shaft seat and the small end of the guiding connection block penetrates through the eccentric shaft seat.
5. The high stability lever apparatus of the strain controlled direct shear of claim 4, wherein four planar needle roller bearings are further installed between the upper surface of the eccentric shaft seat and the lower surface of the eccentric shaft seat upper seat, and 4 of the planar needle roller bearings are located outside the guide connection block and are distributed in a rectangular shape.
6. The strain controlled direct shear apparatus high stability lever arrangement of claim 2, wherein the eccentric shaft has a lever ratio of 1: 24.
7. The high stability lever arrangement of the strain controlled direct shear apparatus according to claim 2, wherein a lifting lug is mounted at the other end of the lever, and a weight is suspended on the lifting lug.
8. The high stability lever apparatus of the strain controlled direct shear apparatus according to claim 2, wherein the bottom end of the base plate of the eccentric shaft seat is further installed with a self-adjusting axial bearing, the self-adjusting axial bearing is of an Ω -shaped structure, and two ends of the eccentric shaft penetrate through the deep groove ball bearing and are rotatably connected with the self-adjusting axial bearing.
9. The strain controlled direct shear high stability lever apparatus of claim 1, further comprising a pressure head mounted at a middle portion of the cross beam.
10. The strain controlled direct shear apparatus high stability lever device of claim 9, further comprising a shear box, a connection block, a steel ring and a fixing seat; the shearing box is placed on the bottom plate below the cross beam, and a soil sample to be tested is contained in the shearing box; one side of the shearing box is sequentially connected with the fixed seat through the connecting block and the steel ring; the fixing seat is fixed on the bottom plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921316142.3U CN210775074U (en) | 2019-08-14 | 2019-08-14 | Strain control type direct shear apparatus high stability lever device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921316142.3U CN210775074U (en) | 2019-08-14 | 2019-08-14 | Strain control type direct shear apparatus high stability lever device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210775074U true CN210775074U (en) | 2020-06-16 |
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ID=71056107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921316142.3U Expired - Fee Related CN210775074U (en) | 2019-08-14 | 2019-08-14 | Strain control type direct shear apparatus high stability lever device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210775074U (en) |
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2019
- 2019-08-14 CN CN201921316142.3U patent/CN210775074U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200616 |
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| CF01 | Termination of patent right due to non-payment of annual fee |