CN216594112U - Spring test fixing seat - Google Patents
Spring test fixing seat Download PDFInfo
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- CN216594112U CN216594112U CN202122831341.1U CN202122831341U CN216594112U CN 216594112 U CN216594112 U CN 216594112U CN 202122831341 U CN202122831341 U CN 202122831341U CN 216594112 U CN216594112 U CN 216594112U
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- sliding
- telescopic rod
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- sliding pin
- groove
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Abstract
The spring test fixing seat provided by the utility model is provided with a plurality of sliding grooves, sliding pins for abutting against test objects are arranged in the sliding grooves, the sliding pins are fixedly arranged on telescopic rods of a driving assembly, the telescopic rods and a driving piece are in threaded transmission, the driving piece rotates to drive the telescopic rods to move linearly, the sliding grooves, the sliding pins, the telescopic rods and the driving piece are the same in number, and the driving pieces rotate independently. In the spring test fixing seat, the position adjustment of the sliding pins is independent, the sliding pins can firmly abut against a test object and can also correct the central shaft of the test object, so that the accuracy of a test result is ensured; the position adjustment of the sliding pin is driven by a thread structure, so that the adjustment process is quick and convenient.
Description
Technical Field
The utility model belongs to the field of elasticity test of components, and particularly relates to a fixing device for spring test.
Background
In the test equipment of the cylindrical helical spring, two ends of a test object are positioned by the circumferential steps of a disc-shaped fixed seat, and the fixed seat is fixed on a rack. When the steam turbine set of the power plant is overhauled, the efficiency of the spring test work is low and the risk is high. The reason is that: the test object specification is many, weight is big, and spring testing machine quantity and maintenance duration are all limited, need frequently to change big quality fixing base.
One solution is to provide a plurality of concentric circumferential steps on the mounting base, but the number of spring specifications to be tested is still small. Another kind of solution is, be equipped with 3 spouts of radial extension on the fixing base, be equipped with the setting element that is used for conflicting test object in the spout, the setting element is portable to the spring of testable multiple specification.
The 3 positioning pieces of the latter scheme are respectively fixed by bolt pairs or synchronously driven by 3 linked lead screws. In the first structure, each positioning piece moves independently, the central shaft of a test object can be corrected, but the bolt pair is troublesome to disassemble and assemble. The adjustment of the second structure is easy to operate, but can not guarantee that each positioning piece is firmly abutted, and can not correct the central shaft of the test object, thereby influencing the test result.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of how to ensure that the adjustment process is reliable, effective, quick and convenient for a spring test fixing seat capable of testing springs with various specifications.
The utility model provides a spring test fixing seat which comprises a circular bearing disc, wherein a plurality of sliding grooves which are uniformly distributed and radially extend are formed in the bottom surface of the bearing disc, sliding pins which can move along the radial direction of the bearing disc are arranged in the sliding grooves, and the sliding pins are used for abutting against a test object. The sliding pin is arranged on the driving assembly, and the driving assembly comprises a telescopic rod, a driving piece and a fixing piece. A part of the telescopic rod extends into the sliding groove and is fixedly connected with the sliding pin, the telescopic rod is provided with a first thread, the fixing piece is fixedly installed on the bearing disc outside the sliding groove, the driving piece is rotatably installed on the fixing piece and is provided with a second thread, the second thread is meshed with the first thread, and the driving piece drives the telescopic rod to linearly move in the axial direction through rotation. The sliding grooves, the sliding pins, the telescopic rods and the driving pieces are the same in number, and the rotation of the driving pieces is independent.
Optionally, there are three or four of the chutes.
Optionally, the sliding pin is a T-shaped block, the tail of the sliding pin is located in the sliding groove and is fixedly connected with the telescopic rod, and the head of the sliding pin spans over the opening of the sliding groove and is used for abutting against the test object.
Optionally, the surface of the head of the sliding pin, which is abutted against the test object, is provided with an elastic material layer, and the cross section of the elastic material layer is arc-shaped.
Optionally, a central groove is formed in the bottom surface of the bearing disc, the fixing member is fixedly installed in the central groove and is isolated from the side wall of the central groove, the sliding groove is provided with an opening located at the inner side of the sliding groove in the side wall of the central groove, a sliding pin through hole is formed in the tail portion of the sliding pin, the first thread is an outer cylindrical thread on the outer side surface of the telescopic rod, the driving member is a cylindrical sleeve, and the second thread is an inner cylindrical thread on the inner wall of the central hole of the driving member. The telescopic rod penetrates through the sliding pin through hole, the part of the telescopic rod, which is positioned between the sliding pin and the fixing piece, is meshed with the central hole of the driving piece, and the part of the telescopic rod, which is exposed out of the driving piece, is positioned in the sliding groove; the driving piece is horizontally arranged, one end of the driving piece, close to the sliding pin, is located at the opening on the inner side of the sliding groove, the other end of the driving piece is located on the fixing piece, and the driving piece is driven by external force to rotate so as to change the length of the part, meshed with the telescopic rod, of the driving piece.
Optionally, the telescopic rod is provided with a plurality of telescopic rod through holes which are radially communicated, the telescopic rod through holes are uniformly distributed along the length direction of the telescopic rod, the tail part of the sliding pin is provided with a sliding pin screw hole aligned with the telescopic rod through hole, the sliding pin screw hole and the telescopic rod through hole are internally provided with sliding pin screws, and the sliding pin screws are used for fastening the sliding pin and the telescopic rod.
By adopting the structure, the sliding pin can be arranged at different positions of the telescopic rod, so that rough positioning is firstly carried out; and then adjusted by a screw-driven drive assembly for fine positioning. When test objects with different specifications are changed, the rough positioning and the fine positioning are combined, so that the adjusting speed can be improved
Optionally, the side wall of the central groove is divided into an upper part and a lower part which are transited by a right-angle step, and the inner side opening of the sliding chute is positioned at the upper part of the side wall of the central groove; the right-angle step is lower than the bottom surface of the sliding chute, and the height difference between the right-angle step and the sliding chute is smaller than the thickness of the wall of the driving piece; one end of the driving piece, which is close to the sliding pin, is positioned on the right-angle step, and the end surface of the driving piece is abutted to the lower part of the opening on the inner side of the sliding chute.
Optionally, a first protruding part isolated from the telescopic rod is arranged on the bottom surface of the sliding groove, and the first protruding part abuts against the driving part and is close to the end surface of the sliding pin.
Optionally, the fixing piece has only one fixing piece blind hole, and the outer side wall of the fixing piece is provided with four fixing piece blind holes, and one end of the driving piece, which is far away from the sliding pin, is located in the fixing piece blind hole.
Optionally, the fixing member includes a base and a blind hole cover, the base is fixed in the central groove, and a top surface groove is formed in a top surface of the base, the blind hole cover is detachably mounted on the base, and a bottom surface groove is formed in a bottom surface of the blind hole cover; the fixing piece blind hole is composed of the bottom surface groove and the top surface groove, an annular bulge is arranged at the opening of the fixing piece blind hole, and an annular groove correspondingly matched with the annular bulge is arranged on the side wall of the driving piece.
The spring test fixing seat is provided with a plurality of sliding grooves, sliding pins for abutting against test objects are arranged in the sliding grooves, the sliding pins are fixedly arranged on telescopic rods of the driving assembly, the telescopic rods and the driving piece are in threaded transmission, the driving piece rotates to drive the telescopic rods to move linearly, the sliding grooves, the sliding pins, the telescopic rods and the driving piece are the same in number, and the driving pieces rotate independently. The beneficial effects are as follows:
(1) the position adjustment of the sliding pins is independent, the sliding pins can firmly abut against a test object and can also correct the central shaft of the test object, so that the accuracy of a test result is ensured;
(2) the position adjustment of the sliding pin is driven by a thread structure, so that the adjustment process is quick and convenient.
Drawings
The following detailed description should be read with reference to the drawings. In the drawings:
FIG. 1 is a schematic top view of a first embodiment;
FIG. 2 is a sectional view taken along line A-A of FIG. 1, with portions broken away;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 is a perspective view of the slide pin of FIG. 1;
FIG. 5 is a schematic top view illustrating the operation of the first embodiment;
FIG. 6 is a schematic cross-sectional view illustrating an operation state of the first embodiment;
FIG. 7 is a schematic sectional view of the second embodiment;
FIG. 8 is a schematic sectional view of a third embodiment;
Detailed Description
For a fuller understanding of the contents of the present invention, reference should be made to the following description taken in conjunction with the accompanying drawings.
In this specification: the directional indicators "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the viewing angle provided in the figures.
Example one
The spring test fixing seat is a component of spring performance test equipment and is installed on a rack of the test equipment in pairs. The device is used for fixing two ends of a cylindrical helical spring (a test object), and ensures the safety of the test process and the accuracy of the test result.
Referring to fig. 1 to 6, the spring test fixing base includes a circular supporting plate 10, a bolt pair 20 and a driving assembly 30. The bolt pair 20 is used for mounting the spring test fixing seat on a stand (not shown in the drawing) of the test equipment.
The bottom surface of the basin 10 is provided with a central groove 12 and four sliding grooves 11 which are uniformly distributed and extend radially. The chute 11 is provided with a chute inner side opening 11a located at the side wall of the central groove 12. The slide groove 11 is provided with a slide pin 40 that can move in the radial direction of the basin 10.
In other embodiments, the number of chutes 11 may be three.
The side wall of the central groove 12 is divided into upper and lower portions by a right-angled step 121, and the chute inside opening 11a is located at the upper portion of the side wall of the central groove 12. The right-angled step 121 is flush with the bottom surface of the chute 11.
The slide pin 40 is a T-shaped block. The rear portion of the slide pin 40 is located in the slide groove 11, and is provided with a slide pin through hole 40 a. The head of the slide pin 40, which is used to abut against the test object, has an arc-shaped cross section, and spans the opening of the slide groove 11, and the surface of the slide pin abutting against the test object is provided with an elastic material layer 41.
In other embodiments, the head of the sliding pin 40 is located in the sliding slot 11, i.e. the sliding slot 11 is in an inverted T shape.
The driving assembly 30 includes a telescopic rod 31, a driving member 32, and a fixing member 33. There is only one fixing member 33. The number of the sliding chutes 11, the sliding pins 40, the telescopic rods 31 and the driving pieces 32 is the same, and the sliding chutes, the sliding pins 40, the telescopic rods 31 and the driving pieces 32 are four.
The fixing member 33 is fixedly installed in the central recess 12 and spaced apart from the sidewall of the central recess 12. The outer side wall of the fixing member 33 is provided with four fixing member blind holes 331. The fixture 33 is comprised of a base 333 and a blind hole cover 332. The base 333 is fixed in the central recess 12 and has four top recesses on its top surface. The blind hole cover 332 is detachably mounted on the base 333 and has four bottom grooves on the bottom surface. The upper bottom surface grooves and the top surface grooves are in one-to-one correspondence and are combined with each other to form fixing piece blind holes 331. The blind fastener hole 331 is configured to receive a driver 32 (described below) therein, wherein the driver 32 can be rotated and removed from its opening.
In other embodiments, an annular protrusion is disposed at the opening of the fixing member blind hole 331, and an annular groove corresponding to the annular protrusion is disposed on the side wall of the driving member 32. Thus, the driving member 32 can rotate in the blind hole 331 of the fixing member without moving in the horizontal direction, and can be taken out after opening the blind hole cover 332.
Specifically, the bottom surface of the central groove 12 is provided with a second protrusion 121, and the bottom surface of the base 333 is provided with a positioning groove cooperating with the second protrusion 121. The second protrusion 121 is inserted into the positioning groove to prevent the rotation of the fixing member 33.
In other embodiments, the number of the fixing members 33 may be four, and are mounted on the circumferential peripheral sidewall of the basin 10, or mounted on the bottom surface near the sidewall of the basin 10.
Specifically, the basin 10 and the base 333 are respectively provided with a central through hole. The bolt pair 20 comprises a bolt 21, and one end of the bolt 21 is provided with a nut 22. The other end of the screw 21 extends through the central through holes of the scale pan 10 and the base 333 and then engages the nut 23 to secure the scale pan 10 and the base 333 together. The blind hole cover 332 is ring-shaped, and is bolted to the base 333, and has a circular center hole having a diameter larger than that of the nut 22 or the nut 23.
In other embodiments, there are multiple sets of bolt sets 20, and the bolt sets 20 that are not in the center of the basin 10 are used only to mount the spring test fixture on the stand of the test apparatus.
The outer side surface of the telescopic rod 31 is provided with outer cylindrical threads. The driving member 32 is a cylindrical sleeve having an inner cylindrical thread on the inner wall of its central bore. The outer cylindrical thread and the inner cylindrical thread may be engaged with each other.
The expansion link 31: the rear portion of the slide pin 40 is fixedly connected to the slide pin through hole 40a, the portion of the rear portion between the slide pin 40 and the fixed member 33 is engaged with the central hole of the driving member 32, and the portion (fixedly connected with the slide pin 40) exposed from the driving member 32 extends into the sliding slot 11.
The telescopic rod 31 is provided with a plurality of telescopic rod through holes 311 which are radially communicated, the telescopic rod through holes 311 are uniformly distributed along the length direction of the telescopic rod 31, the tail part of the sliding pin 40 is provided with a sliding pin screw hole 40b aligned with the telescopic rod through hole 311, the sliding pin screw hole 40b and the telescopic rod through hole 311 are internally provided with a sliding pin screw 401, and the sliding pin screw 401 is used for fastening the sliding pin 40 and the telescopic rod 31.
The driving member 32 is horizontally disposed between the fixing member 33 and the chute 11. The end of driver 32 adjacent to slide pin 40 rests on right angle step 121. The other end of the driver 32 is located in the fastener blind hole 331. The length L1 of the part of the driving piece which is driven by external force to rotate and is engaged with the telescopic rod 31 is changed. The rotation of the driving member 32 is independent of each other, i.e., the position adjustment of each slide pin is performed individually.
Specifically, the outer side walls of the two ends of the fixing member 33 are provided with self-lubricating teflon coatings for reducing the rotational friction.
In other embodiments, the two ends of the fixing member 33 may be sleeved with bearings.
Specifically, the middle of the driver 32: the suspended frame is arranged above the central groove, and the outer side wall of the suspended frame is provided with an anti-skid layer (grain) for direct manual adjustment.
In other embodiments, the middle outer sidewall of the driver 32 may be provided with a hexagonal collar for manual adjustment by a wrench; a ratchet in transmission connection with the motor can also be arranged for electric adjustment.
The using process of the spring test fixing seat comprises the following steps:
1) firstly, determining which telescopic rod through hole 311 the sliding pin 40 is arranged in according to the diameter of a test object;
2) opening the blind hole cover 332 and taking out the combined body of the driving member 32, the telescopic rod 31 and the slide pin 40;
3) disassembling the sliding pin bolt 401, moving the sliding pin 40 to a preset telescopic rod through hole 311, locking the sliding pin bolt 401, and completing the coarse adjustment of the position of the sliding pin 40;
4) installing a combination of the driving member 32, the telescopic rod 31 and the sliding pin 40, and installing a blind hole cover 332;
5) placing a test object at the central position of the bearing disc;
6) the driving member 32 is rotated to make the sliding pin 40 tightly contact the inner side or the outer side of the test object, thereby completing the fine adjustment of the position of the sliding pin 40.
Example two
The spring test fixing seat is an improvement of the first embodiment, and the main improvement is as follows:
the opening of the fixing member blind hole 331 is not provided with an annular protrusion, and the side wall of the driving member 32 is not provided with an annular groove. Referring to fig. 7, the right-angle step 121 is lower than the bottom surface of the sliding slot 11, and the height difference between the two steps is smaller than the thickness of the wall of the rear driving member 32. One end surface of the driver 32 near the slide pin 40 abuts below the chute inner opening 11 a. Thus, the driver 32 is not easily moved in the horizontal direction when rotated because of the blockage of the chute inside opening 11 a.
The rest of the description is substantially identical to the first embodiment.
EXAMPLE III
The spring test fixing seat is an improvement of the first embodiment, and the main improvement is as follows:
the opening of the fixing member blind hole 331 is not provided with an annular protrusion, and the side wall of the driving member 32 is not provided with an annular groove. Referring to fig. 8, the upper and lower portions of the sidewall of the central groove 12 are formed in a cylindrical surface. The bottom surface of the sliding chute 11 is provided with a first protrusion 111 separated from the telescopic rod 31, and the first protrusion 111 abuts against one end surface of the driving member 32 close to the sliding pin 40. I.e. the end of the drive element 32 near the sliding pin 40 projects into the slide groove 11. Thus, the driving member 32 is not easily moved in the horizontal direction when rotated due to the interference of the first protrusion 111.
The rest of the description is substantially identical to the first embodiment.
Example four
The spring test fixing seat is an improvement of the first embodiment, and the main improvement is as follows:
the driving member 32 is a lead screw, and two ends of the lead screw are fixed by bearings, wherein one end of the lead screw is provided with a manual rotation or electric rotation mechanism. One end of the telescopic rod 31 is fixedly provided with a nut, and the other end is fixedly connected with a sliding pin 40. The nut engages the middle of the drive member 32. The driving member 32 and the telescopic rod 31 are arranged in parallel one on another.
The rest is substantially identical to the embodiment.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (10)
1. A spring test fixing seat comprises a circular bearing disc (10), a plurality of sliding grooves (11) which are uniformly distributed and radially extend are formed in the bottom surface of the bearing disc (10), sliding pins (40) which can move along the radial direction of the bearing disc (10) are arranged in the sliding grooves (11), the sliding pins (40) are used for abutting against a test object, and the spring test fixing seat is characterized in that the sliding pins (40) are arranged on a driving assembly (30), the driving assembly comprises a telescopic rod (31), a driving piece (32) and a fixing piece (33),
a part of the telescopic rod (31) extends into the sliding chute (11) and is fixedly connected with the sliding pin (40), the telescopic rod (31) is provided with a first thread, the fixing piece (33) is fixedly arranged on the basin (10) outside the sliding chute (11), the driving piece (32) is rotatably arranged on the fixing piece (33) and is provided with a second thread, the second thread is meshed with the first thread, and the driving piece drives the telescopic rod (31) to linearly move in the axial direction through rotation;
the number of the sliding grooves (11), the sliding pins (40), the telescopic rods (31) and the driving pieces (32) is the same, and the rotation of the driving pieces (32) is independent.
2. A spring test holder according to claim 1, characterized in that the runners (11) are three or four in number.
3. The spring test holder according to claim 1, wherein the sliding pin (40) is a T-shaped block, the tail of the sliding pin is located in the sliding groove (11) and is fixedly connected with the telescopic rod (31), and the head of the sliding pin crosses over the opening of the sliding groove (11) and is used for abutting against the test object.
4. A spring test holder according to claim 3, characterized in that the surface of the head of the slide pin (40) that is in contact with the test object is provided with a layer (41) of elastic material and is arc-shaped in cross-section.
5. The spring test fixing seat according to claim 3, wherein a central groove (12) is formed in the bottom surface of the basin (10), the fixing member (33) is fixedly installed in the central groove (12) and isolated from the side wall of the central groove (12), the sliding chute (11) is provided with a chute inner side opening (11a) located in the side wall of the central groove (12), the tail part of the sliding pin (40) is provided with a sliding pin through hole (40a), the first thread is an outer cylindrical thread on the outer side surface of the telescopic rod (31), the driving member (32) is a cylindrical sleeve, and the second thread is an inner cylindrical thread on the inner wall of the central hole of the driving member (32);
the telescopic rod (31) penetrates through the sliding pin through hole (40a), the part of the telescopic rod between the sliding pin (40) and the fixed part (33) is meshed with the central hole of the driving part (32), and the part of the telescopic rod exposed out of the driving part (32) is positioned in the sliding groove (11); the driving piece (32) is horizontally arranged, one end of the driving piece close to the sliding pin (40) is positioned at the inner side opening (11a) of the sliding chute, the other end of the driving piece is positioned on the fixing piece (33), and the length (L1) of the part, which is driven by external force, of the driving piece to rotate to be engaged with the telescopic rod (31) is changed.
6. The spring test fixing seat according to claim 5, wherein the telescopic rod (31) is provided with a plurality of telescopic rod through holes (311) which are radially penetrated, the telescopic rod through holes (311) are uniformly distributed along the length direction of the telescopic rod (31), the tail part of the sliding pin (40) is provided with a sliding pin screw hole (40b) which is aligned with the telescopic rod through hole (311), sliding pin screws (401) are arranged in the sliding pin screw hole (40b) and the telescopic rod through hole (311), and the sliding pin screws (401) are used for fastening the sliding pin (40) and the telescopic rod (31).
7. A spring test fixture according to claim 5, characterized in that the side walls of the central recess (12) are divided into an upper part and a lower part which are transited by a right-angled step (121), the chute inside opening (11a) being located at the upper part of the side walls of the central recess (12);
the right-angle step (121) is lower than the bottom surface of the sliding chute (11), and the height difference between the right-angle step and the sliding chute is smaller than the thickness of the wall of the driving piece (32);
one end of the driving piece (32) close to the sliding pin (40) is positioned on the right-angle step (121), and the end face of the driving piece is abutted to the lower part of the chute inner side opening (11 a).
8. The spring test fixing seat according to claim 5, wherein a first protrusion (111) isolated from the telescopic rod (31) is arranged on the bottom surface of the sliding groove (11), and the first protrusion (111) abuts against the end surface of the driving part (32) close to the sliding pin (40).
9. The spring test holder according to claim 5, wherein the fixing member (33) has only one and the outer side wall thereof is provided with four fixing member blind holes (331), and the end of the driving member (32) away from the slide pin (40) is located in the fixing member blind hole (331).
10. A spring test fixture according to claim 9, wherein the fixing member (33) comprises a base (333) and a blind hole cover (332), the base (333) being fixed in the central recess (12) and having a top surface recess in a top surface thereof, the blind hole cover (332) being detachably mounted on the base (333) and having a bottom surface recess in a bottom surface thereof; the fixing piece blind hole (331) is composed of the bottom surface groove and the top surface groove, an annular bulge is arranged at the opening of the fixing piece blind hole, and an annular groove correspondingly matched with the annular bulge is arranged on the side wall of the driving piece (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122831341.1U CN216594112U (en) | 2021-11-11 | 2021-11-11 | Spring test fixing seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122831341.1U CN216594112U (en) | 2021-11-11 | 2021-11-11 | Spring test fixing seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216594112U true CN216594112U (en) | 2022-05-24 |
Family
ID=81646831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122831341.1U Active CN216594112U (en) | 2021-11-11 | 2021-11-11 | Spring test fixing seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216594112U (en) |
-
2021
- 2021-11-11 CN CN202122831341.1U patent/CN216594112U/en active Active
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