CN116922285A - A centre gripping frock that is used for rubber joint test's independently centering adaptation - Google Patents
A centre gripping frock that is used for rubber joint test's independently centering adaptation Download PDFInfo
- Publication number
- CN116922285A CN116922285A CN202310741917.6A CN202310741917A CN116922285A CN 116922285 A CN116922285 A CN 116922285A CN 202310741917 A CN202310741917 A CN 202310741917A CN 116922285 A CN116922285 A CN 116922285A
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- 238000012360 testing method Methods 0.000 title claims abstract description 22
- 230000006978 adaptation Effects 0.000 title claims description 5
- 238000003825 pressing Methods 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 230000003044 adaptive effect Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses an autonomous centering adaptive clamping tool for rubber joint testing, which comprises a clamping body with a circular hole type clamping space in the center, more than two clamping blocks with equal arc lengths distributed on the peripheral wall of the clamping space and capable of radially stretching, and a hydraulic mechanism for pushing the clamping blocks to radially stretch is arranged in the clamping body. The hydraulic mechanism comprises a pressure dividing cylinder, a hydraulic source and a hydraulic flow passage, wherein the pressure dividing cylinder belongs to each clamping block, the pressure dividing cylinder is opened on the inner wall of the clamping space, the space in the cylinder comprises a hydraulic space of a bottom section and a piston stroke space of an outer section, the hydraulic source is communicated with the hydraulic space of each pressure dividing cylinder and the hydraulic space of each pressure dividing cylinder through the hydraulic flow passage, and the piston stroke space is provided with a piston capable of pushing the clamping block. Compared with the traditional clamping mode of interference fit, the radial clamping and radial clamping withdrawal device has the advantages that the radial clamping and radial clamping withdrawal device does not cause scratch damage to the outer sleeve of the rubber joint.
Description
Technical Field
The utility model relates to an autonomous centering adaptive clamping tool for rubber joint testing, and belongs to the technical field of rubber joint testing tools.
Background
The clamping method before the current rubber joint test experiment comprises the following steps:
one class is: and pressing the rubber joint into the integral tooling sleeve with a certain interference, and then installing the sleeve on a test bed to test the radial rigidity, the axial rigidity and the deflection torsional rigidity. Because the outer wall of rubber joint and frock inner wall between are metallic interference fit, consequently, the fish tail appears on rubber joint product after accomplishing the experiment, can't continue to use, has produced a large amount of wastes. Meanwhile, the metal interference can cause certain damage to the inner wall of the tool, so that the tool size is deviated, and the size becomes large after repeated use again, and the test result is affected.
The other is: is clamped in a screwing way by a threaded lead screw, a bolt and the like. Such clamping means is complicated to set up, cumbersome to operate, but is also a common way, mostly to install the clamp directly on the laboratory bench.
Through searching, a large number of patent documents for clamping rubber joints and spherical hinges are found, and an utility model thought is selected to be closer to the disclosure of the utility model as follows:
application number: 202123020988.2, name: novel spherical hinge anchor clamps. The patent document discloses a novel spherical hinge anchor clamps, two spouts have been seted up to the top of workstation in both ends position department symmetry, two the inboard of spout is equal sliding connection has the slide, two the inside of slide is located middle section position department and all is connected with the lead screw through the screw tooth rotation, two the both ends of lead screw all rotate with the inboard both ends of two spouts respectively and be connected. According to the utility model, the spherical hinge detection pieces can be simply and rapidly clamped and fixed through the spherical hinge clamping and fixing mechanism, the operation is simple and rapid, the fixing reliability is high, the spherical hinge detection pieces with different diameters can be clamped and fixed, the practicability is improved, the two sliding blocks are driven to slide through the rotation of the two screw rods, the distance between the two fixing frames is adjusted, the spherical hinge detection pieces are convenient to assemble and disassemble, the detection operation is convenient, the spherical hinge detection pieces with different lengths can be fixed, and the practicability is improved.
The operation is also simple from the further disclosure of this document, but its structural arrangement is still complex and the force reliability of the structural parts is poor when clamped strongly.
Disclosure of Invention
The utility model aims to solve the technical problems that: the clamping tool is free of damage to rubber joints and very simple and convenient to operate.
Aiming at the problems, the technical scheme provided by the utility model is as follows:
a clamping fixture for self-centering adaptation of rubber joint test comprises a clamping body with a circular hole type clamping space in the center, more than two clamping blocks with equal arc lengths which are distributed on the peripheral wall of the clamping space and can radially stretch out and draw back, and a hydraulic mechanism for pushing the clamping blocks to radially stretch out and draw back is arranged in the clamping body.
Further, the hydraulic mechanism comprises a pressure dividing cylinder, a hydraulic source and a hydraulic flow passage, wherein the pressure dividing cylinder belongs to each clamping block, the pressure dividing cylinder is opened on the inner wall of the clamping space, the space in the cylinder comprises a hydraulic space of a bottom section and a piston stroke space of an outer section, the hydraulic source is communicated with the hydraulic space of each pressure dividing cylinder and the hydraulic space of each pressure dividing cylinder through the hydraulic flow passage, and the piston stroke space is provided with a piston capable of pushing the clamping block.
Further, a valve switch which can turn on and off the hydraulic flow passage is arranged on the hydraulic flow passage communicated with the space in the pressure dividing cylinder, and the pressure dividing cylinder is a closed and independent container when the valve switch on the hydraulic flow passage is closed.
Furthermore, an isobaric spring with one end fixed at the bottom of the pressure dividing cylinder and the other end fixed at the inner end of the piston is arranged in the hydraulic space, the isobaric springs in the pressure dividing cylinders have the same specification, when the clamping body is horizontally placed, the isobaric springs always control the clamping blocks on the same circle with the axle center of the round hole type clamping space as the center of a circle, and when the hydraulic pressure in the hydraulic space is released, the clamping blocks are retracted towards the pressure dividing cylinder.
Further, the hydraulic source comprises a source pressure cylinder, the source pressure cylinder comprises a source hydraulic space and a pressure application piston stroke space, the pressure application piston stroke space is provided with a pressure application piston capable of applying pressure to the source hydraulic space, and the source hydraulic space is communicated with the hydraulic space of each pressure division cylinder through a hydraulic flow passage.
Further, the source hydraulic space, the hydraulic space and the hydraulic flow passage are filled with a pressure-conducting liquid.
Further, a mechanism for applying pressure to the pressure piston is provided at the outer end of the pressure piston.
Further, the outer end of the pressure applying piston is provided with a mechanism for applying pressure to the pressure applying piston, the clamping body outside the stroke space of the pressure applying piston is provided with a nozzle communicated with the stroke space of the pressure applying piston, and the pressure applying piston is applied by high-pressure liquid or gas injected into the nozzle.
Further, the outer end of the pressure applying piston is provided with a mechanism for applying pressure to the pressure applying piston, a threaded hole communicated with the pressure applying piston stroke space is formed in the clamping body outside the pressure applying piston stroke space, and a pressure applying bolt capable of applying pressure to the pressure applying piston is arranged in the threaded hole.
Further, the clamping block is detachably fixedly connected with the outer end of the piston.
Advantageous effects
1. Compared with the traditional clamping mode of interference fit, the radial clamping and radial clamping withdrawal are adopted, so that scratch damage to the outer sleeve of the rubber joint can not be caused.
2. The operation is very simple and convenient, and the rubber joint can be automatically clamped in the center of the clamping space by only injecting liquid and pressurizing or only turning one pressing bolt.
Drawings
FIG. 1 is a schematic horizontal section of a clamping tool according to an embodiment, wherein a section line of a clamping body is subjected to blanking treatment for facilitating drawing recognition;
FIG. 2 is a schematic partial view of a horizontal cross-section of a clamping tool according to an embodiment;
fig. 3 is a schematic partial view of a schematic horizontal section of a clamping tool according to a second embodiment;
fig. 4 is a schematic perspective view of a clamping tool according to a second embodiment;
fig. 5 is a schematic plan view of the rubber joint.
In the figure: 1. clamping the body; 101. clamping the space; 2. a source pressure cylinder; 201. a source hydraulic space; 202. a pressing piston; 3. a pressure dividing cylinder; 301. a hydraulic space; 302. a piston; 4. a hydraulic flow passage; 401. a valve switch; 5. equalizing pressure springs; 6. a nozzle; 7. clamping blocks; 701. a screw; 8. a threaded hole; 9. a threaded sleeve; 10. a pressing bolt; 11. a rubber joint; 1101. and (3) a jacket.
Detailed Description
The utility model is further described below with reference to examples and figures:
example 1
As shown in fig. 1, 2 and 5, an autonomous centering adaptation clamping tool for rubber joint testing comprises a clamping body 1 with a circular hole type clamping space 101 in the center, and more than two clamping blocks 7 which are distributed on the circumferential wall of the clamping space 101 in equal arc length and can radially stretch, wherein a hydraulic mechanism for pushing the clamping blocks 7 to radially stretch is arranged in the clamping body 1. When the clamp splice is applied, the hydraulic mechanism pushes the clamp splice 7 to radially and centripetally extend to clamp the outer sleeve 1101 of the rubber joint 11 placed in the clamping space, and after detection is completed, the hydraulic mechanism controls the clamp splice 7 to retract to take out the rubber joint 11. Therefore, the clamping of the rubber joint 11 is not carried out in an interference fit mode, the scratch of a product is avoided, the clamping speed is high, and the operation is simple.
The hydraulic mechanism comprises a pressure dividing cylinder 3, a hydraulic source and a hydraulic flow passage 4, wherein the pressure dividing cylinder 3 is divided into each clamping block 7, the pressure dividing cylinder 3 is opened on the inner wall of the clamping space 101, the cylinder inner space comprises a bottom section hydraulic space 301 and an outer section piston stroke space, the hydraulic source is communicated with the hydraulic space 301 of each pressure dividing cylinder 3 and the hydraulic space 301 of each pressure dividing cylinder 3 through the hydraulic flow passage 4, and the piston stroke space is provided with a piston 302 capable of pushing the clamping block 7. Thus, the hydraulic space 301, the hydraulic flow passage 4 and the hydraulic pressure source constitute an integral container capable of communicating. In use, the hydraulic pressure source applies pressure to the liquid in the container, pushing the piston 302 in the pressure dividing cylinder 3 to clamp the rubber joint 11.
The hydraulic space 301 is internally provided with equal pressure springs 5, one end of which is fixed at the bottom of the pressure dividing cylinder 3, the other end of which is fixed at the inner end of the piston 302, the equal pressure springs 5 in each pressure dividing cylinder 3 have the same specification, when the clamping body 1 is horizontally placed, the clamping blocks 7 are always controlled on the same circle with the axle center of the round hole type clamping space 101 as the center of the circle by the equal pressure springs 5, and when the hydraulic pressure in the hydraulic space 301 is released, the clamping blocks 7 are retracted towards the pressure dividing cylinder 3. Here, one function of the isobaric spring 5 is to pull back the clamping block 7 toward the direction of the pressure-dividing cylinder 3 when the hydraulic pressure in the hydraulic space 301 is released, so that the clamping block 7 is retracted, the rubber joint 11 is convenient to be unclamped, and simultaneously, after the clamping block 7 is retracted, the circle where the clamping block 7 is located is enlarged, and the next clamping of the rubber joint 11 is also convenient. Another more critical function of the equal pressure springs 5 is that when the clamping body 1 is horizontally placed and pressure is applied to the liquid in the hydraulic space 301 of the pressure dividing cylinder 3, the pressure of the liquid in the hydraulic space 301 of each pressure dividing cylinder 3 is kept equal (the pressure in the same depth in the liquid is equal), so that the pistons 302 can extend equidistantly, and the clamping blocks 7 can be controlled on the same circle with the axis of the circular hole type clamping space 101 as the center of the circle, that is, the rubber joints 11 can be clamped in the center of the clamping space 101. The pistons 302 do not have to extend equidistantly if no isostatic springs 5 are present, since non-equidistant extension of the pistons 302 also makes the pressures in the respective hydraulic spaces 301 equal. However, when the equal pressure springs 5 are disposed, if one piston 302 extends a larger distance than the other pistons 302, this means that the equal pressure springs 5 connected to the piston 302 are pulled longer, which requires that the pressure in the hydraulic space 301 where the equal pressure springs 5 are disposed is greater than that in the other hydraulic spaces 301, and the pressure in the greater than other hydraulic spaces 301 can be transferred in all directions in the liquid according to the original size, so that the pressure in each hydraulic space 301 tends to be balanced. Therefore, the above-mentioned arrangement of the isobaric springs 5 can avoid the occurrence of the situation that all the clamping blocks 7 are not on the same circle with the axis center of the circular hole type clamping space 101 as the center of the circle due to the unbalanced pressure of the hydraulic space 301 of each partial pressure cylinder 3 on the premise that the hydraulic spaces 301 are communicated.
The hydraulic flow passage 4 communicated with the space in the pressure dividing cylinder 3 is provided with a valve switch 401 which can open and close the hydraulic flow passage 4, and when the valve switch 401 on the hydraulic flow passage 4 is closed, the pressure dividing cylinder 3 is a closed and independent container. In this way, the piston 302 in each pressure dividing cylinder 3 cannot retract regardless of the force, so that all the clamping blocks 7 always maintain a stable clamping state to the rubber joint 11.
The hydraulic pressure source includes a source cylinder 2, the source cylinder 2 includes a source hydraulic pressure space 201 and a pressure piston stroke space, a pressure piston 202 capable of applying pressure to the source hydraulic pressure space 201 is provided in the pressure piston stroke space, and the source hydraulic pressure space 201 communicates with the hydraulic pressure spaces 301 of the respective pressure cylinders 3 through the hydraulic flow passages 4. The source hydraulic space 201, the hydraulic space 301 and the hydraulic flow passage 4 are filled with a pressure-conducting liquid. This is to avoid that the source hydraulic space 201, the hydraulic space 301 and the hydraulic flow passage 4 as a whole (when the valve switch 401 is opened) enter the air bubbles, because the air bubbles are compressed by the force, causing the outer jacket 1101 of the rubber joint 11 to shake when the force is detected.
At the outer end of the pressure piston 202 is provided a mechanism for applying pressure to the pressure piston 202. The pressurizing mechanism is that a nozzle 6 communicating with the pressurizing piston stroke space is provided on the clamp body 1 outside the pressurizing piston stroke space, and the pressurizing piston 202 is pressurized by high-pressure liquid or gas injected into the nozzle 6.
The clamping block 7 is detachably fixedly connected with the outer end of the piston 302, and can be fixed by a screw 701. In this way, the clamping blocks 7 can be replaced according to the size of the test object.
The clamping surface of the clamping block 7 is an arc-shaped surface matched with the outer peripheral surface of the outer sleeve 1101 of the rubber joint 11, which is a clamping object. The number of clamping blocks 7 is at least two, preferably four.
The application of the embodiment is to externally arrange a high-pressure pipeline with a pressure gauge. When the hydraulic joint clamp is applied, the high-pressure pipeline applies pressure to the pressure-applying piston 202 through the injection nozzle 6, the pressure-applying piston 202 pushes the liquid in the source hydraulic space 201 into the hydraulic spaces 301 of the pressure-dividing cylinders 3, and the piston 302 is forced to push the clamping blocks 7 to clamp the rubber joint 11. When the value displayed by the pressure gauge reaches the set value, the clamping degree of the rubber joint 11 is required, the valve switches 401 can be closed, and then the high-pressure pipeline is separated from the injection nozzle, so that the clamping of the rubber joint 11 is completed.
Example two
As shown in fig. 3, 4, 5, the difference from the first embodiment is that: the mechanism for applying pressure to the pressure application piston 202 is that a threaded hole 8 communicated with the pressure application piston stroke space is arranged on the clamping body 1 outside the pressure application piston stroke space, and a pressure application bolt 10 capable of applying pressure to the pressure application piston 202 is arranged in the threaded hole 8. When the clamping device is applied, the clamping of the rubber joint 11 can be completed only by tightening the pressing bolt 10. In order to grasp the degree of clamping the rubber joint 11, a torque wrench may be used when tightening the pressing bolt 10, and whether the rubber joint 11 is clamped may be judged by observing the torque value of the torque wrench.
Further, a threaded sleeve 9 having an internal thread and an external thread is inserted into the threaded hole 8, and when in use, the pressing bolt 10 is screwed through the threaded sleeve 9 to push the pressing piston 202. In this way, the threaded sleeve 9 can be replaced if necessary, since the internal thread between the pressure bolt 10 and the threaded sleeve 9 may be susceptible to wear failure during repeated unscrewing.
The above embodiments are only for the purpose of more clearly describing the present utility model and should not be construed as limiting the scope of the present utility model, and any equivalent modifications should be construed as falling within the scope of the present utility model.
Claims (10)
1. A centre gripping frock that is used for rubber joint test's independently centering adaptation, including centre gripping body (1) that has circular hole formula clamp space (101), more than two equal arc length lay clamp splice (7) that can radially stretch out and draw back at clamp space (101) perisporium, its characterized in that: a hydraulic mechanism for pushing the clamping blocks (7) to radially stretch and retract is arranged in the clamping body (1).
2. The self-centering adapted clamping tool for rubber joint testing according to claim 1, wherein: the hydraulic mechanism comprises a pressure dividing cylinder (3), a hydraulic source and a hydraulic flow passage (4) which belong to each clamping block (7), the pressure dividing cylinder (3) is opened on the inner wall of the clamping space (101), the space in the cylinder comprises a hydraulic space (301) of a bottom section and a piston stroke space of an outer section, the hydraulic source is communicated with the hydraulic space (301) of each pressure dividing cylinder (3) and the hydraulic space (301) of each pressure dividing cylinder (3) through the hydraulic flow passage (4), and the piston stroke space is provided with a piston (302) capable of pushing the clamping block (7).
3. The self-centering adapted clamping tool for rubber joint testing according to claim 2, wherein: the hydraulic flow passage (4) communicated with the space in the pressure dividing cylinder (3) is provided with a valve switch (401) which can open and close the hydraulic flow passage (4), and when the valve switch (401) on the hydraulic flow passage (4) is closed, the pressure dividing cylinder (3) is a closed and independent container.
4. The self-centering adapted clamping tool for rubber joint testing according to claim 2, wherein: an isobaric spring (5) is arranged in the hydraulic space (301), one end of the isobaric spring is fixed at the bottom of the pressure dividing cylinder (3), the other end of the isobaric spring is fixed at the inner end of the piston (302), the specifications of the isobaric springs (5) in each pressure dividing cylinder (3) are the same, when the clamping body (1) is horizontally placed, the clamping blocks (7) are always controlled on the same circle taking the axle center of the round hole type clamping space (101) as the center of a circle by the isobaric spring (5), and when the hydraulic pressure in the hydraulic space (301) is relieved, the clamping blocks (7) are retracted towards the direction of the pressure dividing cylinder (3).
5. The self-centering adapted clamping tool for rubber joint testing according to claim 2, wherein: the hydraulic source comprises a source hydraulic cylinder (2), the source hydraulic cylinder (2) comprises a source hydraulic space (201) and a pressure application piston stroke space, a pressure application piston (202) capable of applying pressure to the source hydraulic space (201) is arranged in the pressure application piston stroke space, and the source hydraulic space (201) is communicated with the hydraulic spaces (301) of the pressure division cylinders (3) through hydraulic flow channels (4).
6. The self-centering adapted clamping tool for rubber joint testing according to claim 5, wherein: the source hydraulic space (201), the hydraulic space (301) and the hydraulic flow channel (4) are filled with a pressure-conducting liquid.
7. The self-centering adapted clamping tool for rubber joint testing according to claim 5, wherein: the outer end of the pressure piston (202) is provided with a mechanism for applying pressure to the pressure piston (202).
8. The self-centering adapted clamping tool for rubber joint testing according to claim 7, wherein: the outer end of the pressure applying piston (202) is provided with a mechanism for applying pressure to the pressure applying piston (202), the clamping body (1) outside the stroke space of the pressure applying piston is provided with a nozzle (6) communicated with the stroke space of the pressure applying piston, and the pressure applying piston (202) is applied with pressure by high-pressure liquid or gas injected into the nozzle (6).
9. The self-centering adapted clamping tool for rubber joint testing according to claim 7, wherein: the outer end of the pressure applying piston (202) is provided with a mechanism for applying pressure to the pressure applying piston (202), a threaded hole (8) communicated with the pressure applying piston stroke space is arranged on the clamping body (1) outside the pressure applying piston stroke space, and a pressure applying bolt (10) capable of applying pressure to the pressure applying piston (202) is arranged in the threaded hole (8).
10. The self-centering adapted clamping tool for rubber joint testing according to claim 2, wherein: the clamping block (7) is detachably fixedly connected with the outer end of the piston (302).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310741917.6A CN116922285A (en) | 2023-06-21 | 2023-06-21 | A centre gripping frock that is used for rubber joint test's independently centering adaptation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310741917.6A CN116922285A (en) | 2023-06-21 | 2023-06-21 | A centre gripping frock that is used for rubber joint test's independently centering adaptation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116922285A true CN116922285A (en) | 2023-10-24 |
Family
ID=88381834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310741917.6A Pending CN116922285A (en) | 2023-06-21 | 2023-06-21 | A centre gripping frock that is used for rubber joint test's independently centering adaptation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116922285A (en) |
-
2023
- 2023-06-21 CN CN202310741917.6A patent/CN116922285A/en active Pending
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