CN210775075U - Strain control type direct shear apparatus high verticality lever device - Google Patents
Strain control type direct shear apparatus high verticality lever device Download PDFInfo
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- CN210775075U CN210775075U CN201921317195.7U CN201921317195U CN210775075U CN 210775075 U CN210775075 U CN 210775075U CN 201921317195 U CN201921317195 U CN 201921317195U CN 210775075 U CN210775075 U CN 210775075U
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- eccentric shaft
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- bottom plate
- direct shear
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Abstract
The utility model discloses a high straightness lever means that hangs down of strain control formula staight scissors appearance, include: the eccentric shaft device comprises a bottom plate, an upright post, a cross beam, an eccentric shaft device and an eccentric shaft base plate; the upright column penetrates through the bottom plate, and the top end of the upright column is connected with two ends of the cross beam; the eccentric shaft device is arranged below the bottom plate and between the upright columns, and the bottom ends of the upright columns are connected with the eccentric shaft seat bottom plate and are connected with the eccentric shaft device through the eccentric shaft seat bottom plate. The utility model relates to a strain control type direct shear apparatus high verticality lever device, which simplifies the structure of the device by the design and use of an eccentric shaft device, reduces half weight mass, reduces labor intensity and one-way cost; through the design of the self-adjusting axial bearing, the self-adjusting verticality of the eccentric shaft after pressurization is effectively guaranteed, the linearity between the eccentric shaft and the pressurization head is guaranteed, the relative error is reduced, the testing accuracy is improved, and the practicability is high.
Description
Technical Field
The utility model relates to a geotechnical test instrument field especially relates to a high straightness lever means that hangs down 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 existing device with the lever ratio of 1:12 has the following defects: 1. the precision of the matching holes for matching 2 bearings cannot reach higher precision, so that the force application precision is influenced to a certain extent, the movement ratio of the bearing assembled on an instrument is too large, and the bearing has certain influence on the power of the instrument; 2. the weight mass is too large, and the labor intensity of operators is high; 3. 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 straightness lever means that hangs down 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 straightness lever means that hangs down 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 device and an eccentric shaft base plate; the upright column penetrates through the bottom plate, and the top end of the upright column is connected with two ends of the cross beam; the eccentric shaft device is arranged below the bottom plate and between the upright columns, and the bottom ends of the upright columns are connected with the eccentric shaft seat bottom plate and are 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 side wall of the eccentric shaft seat close to the upright post is provided with a deep groove ball bearing, 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 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, and after the two ends of the eccentric shaft pass through the deep groove ball bearing, the eccentric shaft is rotatably connected with the self-adjusting axial bearing.
In a preferred embodiment of the present invention, the self-adjusting axial bearing is of an omega-shaped structure, and the self-adjusting axial bearing is bolted to the lower surface of the eccentric shaft seat bottom plate.
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 strain control type direct shear apparatus high verticality lever device, which simplifies the structure of the device by the design and use of an eccentric shaft device, reduces half weight mass, reduces labor intensity and one-way cost; through the design of the self-adjusting axial bearing, the self-adjusting verticality of the eccentric shaft after pressurization is effectively guaranteed, the linearity between the eccentric shaft and the pressurization head is guaranteed, the relative error is reduced, the testing accuracy is improved, and the practicability is high.
Drawings
Fig. 1 is a schematic perspective view of a preferred embodiment of a high verticality lever device of a strain-controlled direct shear apparatus of the present invention;
FIG. 2 is a schematic side view of FIG. 1;
the parts in the drawings are numbered as follows: 1. the device comprises a base plate, 2 columns, 3 cross beams, 4 eccentric shaft seat base plates, 5 pressurizing heads, 6 shearing boxes, 7 steel rings, 8 fixing seats, 9 connecting blocks, 10 eccentric shaft seats, 11 eccentric shafts, 12 levers, 13 balancing weights, 14 adjusting screws, 15 deep groove ball bearings, 16 self-adjusting axial bearings, 17 lifting lugs and 18 weights.
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 straightness lever means that hangs down of strain control formula staight scissors appearance, the device adopt the lever to carry out the institutional advancement for the eccentric shaft that is 1:24 than the lever under the condition that lever length is the same with prior art, have effectively reduced the weight quality, reach national standard requirement.
Specifically, the utility model discloses a lever device includes: the device comprises a bottom plate 1, a stand column 2, a cross beam 3, an eccentric shaft device, an eccentric shaft base plate 4, a pressurizing head 5, a shearing box 6, a steel ring 7, a fixed base 8 and a connecting block 9.
The upright posts 2 penetrate through the bottom plate 1, and the top ends of the upright posts are connected with two ends of the cross beam 3; the eccentric shaft device is arranged below the bottom plate 1 and between the two upright posts 2, and the bottom ends of the upright posts 2 are connected with the eccentric shaft seat bottom plate 4 and are connected with the eccentric shaft device through the eccentric shaft seat bottom plate 4. The upright post 2 can move left and right in the horizontal direction during operation.
The eccentric shaft device comprises an eccentric shaft seat 10, an eccentric shaft 11, a lever 12, a balancing weight 13 and an adjusting screw 14; the side wall of the eccentric shaft seat 10 close to the upright post 2 is provided with a deep groove ball bearing 15, and two ends of a main shaft of the eccentric shaft 11 penetrate through the deep groove ball bearing 15 to be connected with the eccentric shaft seat bottom plate 4; one end of the lever 12 is installed on the main shaft of the eccentric shaft 11, and the other end of the lever extends out of the eccentric shaft seat 10; one end of the adjusting screw 14 is connected with the eccentric shaft 11, and the other end of the adjusting screw extends out of the eccentric shaft seat 10 in the direction opposite to the lever 11; the counterweight 13 is mounted on the adjusting screw 14. The lever ratio of the eccentric shaft 11 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 lower surface of the eccentric shaft seat bottom plate 4 is further fixed with a self-adjusting axial bearing 16 of an omega-shaped structure through bolts, and two ends of a main shaft of the eccentric shaft 11 penetrate through the deep groove ball bearings 15 and then are rotatably connected with the self-adjusting axial bearing 16. The connection between the eccentric shaft 11 and the two upright rods 2 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 17 is arranged at the other end of the lever 12, and a weight 18 is suspended on the lifting lug 17.
The device comprises a pressure head 5, a shearing box 6, a steel ring 7, a fixed seat 8 and a connecting block 9.
The pressurizing head 5 is arranged in the middle of the cross beam 3, the shearing box 6 is placed on the bottom plate 1 below the cross beam 3, a soil sample to be tested is contained in the shearing box, and the pressurizing head 5 is used for applying 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 6 is sequentially connected with the fixed seat 8 through the connecting block 9 and the steel ring 7; the fixed seat 8 is fixed on the bottom plate 1.
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, 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.
The utility model relates to a high straightness lever means that hangs down 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.
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 (8)
1. The utility model provides a high straightness lever means that hangs down 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 device and an eccentric shaft base plate; the upright column penetrates through the bottom plate, and the top end of the upright column is connected with two ends of the cross beam; the eccentric shaft device is arranged below the bottom plate and between the upright columns, and the bottom ends of the upright columns are connected with the eccentric shaft seat bottom plate and are connected with the eccentric shaft device through the eccentric shaft seat bottom plate.
2. The strain controlled direct shear apparatus high verticality lever apparatus according to claim 1, wherein the eccentric shaft apparatus comprises an eccentric shaft seat, an eccentric shaft, a lever, a balancing weight and an adjusting screw; the side wall of the eccentric shaft seat close to the upright post is provided with a deep groove ball bearing, 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 strain controlled direct shear apparatus high verticality lever apparatus according to claim 2, wherein the eccentric shaft has a lever ratio of 1: 24.
4. The strain controlled direct shear apparatus high verticality lever apparatus according to claim 3, wherein a lifting lug is installed at the other end of the lever, and a weight is suspended on the lifting lug.
5. The strain control type direct shear apparatus high verticality lever apparatus according to claim 2, wherein the bottom end of the eccentric shaft seat bottom plate is further provided with a self-adjusting axial bearing, and two ends of the eccentric shaft penetrate through the deep groove ball bearing and are rotatably connected with the self-adjusting axial bearing.
6. The strain controlled direct shear apparatus high verticality lever apparatus according to claim 5, wherein the self-adjusting axial bearing is in an omega-shaped structure, and the self-adjusting axial bearing is bolted on the lower surface of the eccentric shaft seat bottom plate.
7. The strain controlled direct shear apparatus high verticality lever apparatus according to claim 1, further comprising a pressure head mounted in the middle of the cross beam.
8. The strain controlled direct shear apparatus high verticality lever apparatus according to claim 7, further comprising a shear 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921317195.7U CN210775075U (en) | 2019-08-14 | 2019-08-14 | Strain control type direct shear apparatus high verticality lever device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921317195.7U CN210775075U (en) | 2019-08-14 | 2019-08-14 | Strain control type direct shear apparatus high verticality lever device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210775075U true CN210775075U (en) | 2020-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921317195.7U Active CN210775075U (en) | 2019-08-14 | 2019-08-14 | Strain control type direct shear apparatus high verticality lever device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210775075U (en) |
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2019
- 2019-08-14 CN CN201921317195.7U patent/CN210775075U/en active Active
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