Hoisting tool for measuring large shaft parts
By designing special head and tail fixtures and spreaders, using existing bolt holes to fix and cooperate, the problem of mismatch between the pin hole and the shaft diameter in the measurement of large shaft parts is solved, and efficient and accurate measurement and simplification are achieved The installation process reduces the number of operations and calibration work.
Patent Information
- Application Number
- CN202420315600.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-20
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-02-20
AI Technical Summary
When measuring large or special shaft parts, the existing technology has the problem of mismatching the thimble hole and the shaft diameter, which leads to inaccurate measurement results and difficult installation. It requires frequent replacement of the thimble and calibration, which affects efficiency and is easy to tilt during lifting. To damage the instrument, four people usually need assistance.
Design lifting tools for measuring large shaft parts, including head and tail fixtures and spreaders, use existing bolt holes to fix them to avoid additional processing of pin holes, and realize vertical lifting of parts through the symmetrical structure of the spreader. , reduce the number of people operating.
It improves the accuracy and detection efficiency of measurement results, reduces the number of operators, avoids differences in position of the pin hole and tilt damage, and simplifies the installation process.
Smart Images
Figure CN222204474U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of shaft parts detection, in particular to a hoisting tool for measuring large shaft parts. Background Art
[0002] Different testing instruments and software are needed to detect the geometric dimensions of different shaft parts. At present, there are three methods for measuring shaft parts: platform method, coordinate measuring machine method, and special shaft instrument method. However, the first two methods are mostly horizontal placement methods. Affected by the weight of the parts, they will inevitably cause deformation of the parts and affect the test results. Using a shaft measuring machine is the best choice. Its measurement principle is to clamp the measured parts vertically to eliminate deformation due to their own weight.
[0003] In the prior art, when using a shaft measuring machine to inspect shaft parts, it is generally necessary to machine ejector holes at both ends of the parts according to the structure of the parts without affecting the performance of the shaft parts being measured. However, some large or special shaft parts lack this structure, which makes it difficult to install during measurement. Alternatively, the instrument is designed to have an extended locking ejector (for the case where the ejector hole is deeper), and then the upper end of the shaft to be measured is fixed with a lifting rope and hoisted and installed with a crane. The above method has the following problems:
[0004] (1) For some large shaft parts, the ejector hole is processed after the machining is completed, which may cause the ejector hole to be non-concentric with the shaft diameter, affecting the measurement results, and there is a risk of collision with the finished shaft during machining;
[0005] (2) By making an extended locking ejector pin, the top locking ejector pin needs to be replaced each time a different shaft part is clamped, and recalibration is required after replacement, which affects the detection efficiency;
[0006] (3) The hoisting process uses the shaft diameter of the measured shaft to tighten it, which is difficult to find balance, causing the measured shaft to tilt during hoisting, which can easily damage the instrument. In addition, during the hoisting and installation process, at least four people are required to assist in each hoisting. Utility Model Content
[0007] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a lifting tool for measuring large shaft parts. By designing a special clamp tool for the top and tail ends of the large lifting shaft, the clamp tool can not only be fixed with the end of the lifting shaft through bolt holes, but also can be matched with the ejector pin on the measuring instrument. There is no need to additionally process the ejector pin hole on the lifting shaft, and there is no need to use an extended ejector pin, thereby improving work efficiency. The setting of the lifting tool structure ensures that the measured part can be lifted vertically, reducing the number of operators from at least four to two.
[0008] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:
[0009] A hoisting tool for measuring large shaft parts, comprising:
[0010] A head fixture, one side of which is provided with a first limiting groove for matching the top end of the shaft, and the other side of which is provided with a first ejector hole, the first ejector hole is concentric with the first limiting groove, and a plurality of first bolt holes are provided around the first limiting groove;
[0011] The tail clamp has a second limiting groove for matching the tail end of the shaft on one side and a second ejector hole on the other side, the second ejector hole is concentric with the second limiting groove, and a plurality of second bolt holes are arranged around the second limiting groove;
[0012] The sling comprises a lifting beam, a lifting ring is arranged in the middle of one side of the lifting beam, and hooks are symmetrically arranged at both ends of the other side, and the hooks are used to cooperate with the lifting shaft through a lifting rope.
[0013] As a further implementation, the shape of the first limiting groove is adapted to the shape of the top end of the lifting shaft.
[0014] As a further implementation, the shape of the second limiting groove is adapted to the shape of the shaft tail end of the lifting shaft.
[0015] As a further implementation, the first bolt holes are distributed in a circumferential direction on the head fixture, and the first bolt holes are arranged corresponding to the mounting holes on the top end of the shaft.
[0016] As a further implementation, the second bolt holes are distributed in a circumferential direction on the tail clamp, and the second bolt holes are arranged corresponding to the mounting holes on the tail end of the shaft.
[0017] As a further implementation, the tail clamp includes a matching portion, the second limiting groove and the second ejector hole are arranged on both sides of the matching portion, and the matching portion is arranged at the center position of the tail clamp.
[0018] As a further implementation manner, the height of the matching portion is greater than the height of the head fixture.
[0019] As a further implementation, the lifting ring is hinged to the lifting beam, and the lifting hook is hinged to the lifting beam.
[0020] As a further implementation, the span of the two sets of hooks on the lifting beam is greater than the width of the measuring instrument head seat.
[0021] As a further implementation, one end of the lifting rope is used to be fixedly matched with the lifting hook, and the other end is used to be fixedly matched with the lifting shaft.
[0022] The beneficial effects of the above utility model are as follows:
[0023] 1. The setting of the head clamp and the tail clamp of the utility model utilizes the existing part installation holes at both ends of the lifting shaft. By designing special clamp tooling for the top and tail ends of the large lifting shaft, the clamp tooling can not only be fixed with the end of the lifting shaft through the bolt hole, but also can be matched with the ejector pin on the measuring instrument. There is no need to additionally process the ejector pin hole on the lifting shaft, thereby ensuring the accuracy of the measurement result.
[0024] 2. For the case where the ejector pin hole of the lifting shaft is deep, the matching part can be extended into the tailstock of the measuring instrument to cooperate with the ejector pin, so that the clamping of the large lifting shaft is no longer affected by the difference in the depth of the ejector pin holes at both ends, and there is no need to set an extended ejector pin, which saves calibration work and improves detection efficiency.
[0025] 3. The symmetrical structure of the lifting device of the utility model can realize vertical lifting of parts by utilizing the dead weight of the parts, which can ensure that the measured parts do not tilt during lifting, prevent the tilting from damaging the instrument or causing harm to personnel. By using this lifting method, the number of people required for lifting and installation of large shaft parts can be reduced from at least four to two. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.
[0027] Figure 1 It is a structural schematic diagram of the hoisting shaft in the embodiment of the utility model;
[0028] FIG2( a ) is a schematic diagram of a top view of the head fixture in an embodiment of the present utility model;
[0029] FIG2( b ) is a front structural sectional view of the head fixture in an embodiment of the present utility model;
[0030] FIG. 3( a ) is a top view of the tail clamp in an embodiment of the present utility model.
[0031] FIG3( b ) is a front structural cross-sectional view of the tail clamp in an embodiment of the present utility model;
[0032] Figure 4 It is a structural schematic diagram of a sling in an embodiment of the utility model;
[0033] Figure 5 It is a structural schematic diagram of measuring large shaft parts in the prior art;
[0034] Figure 6 It is a schematic diagram of the vertical hoisting structure before the hoisting axis measurement in the embodiment of the present invention;
[0035] Figure 7 It is a structural schematic diagram of the hoisting shaft measurement in this embodiment.
[0036] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.
[0037] Wherein: 1. lifting shaft, 11. top end of shaft, 12. tail end of shaft; 2. head fixture, 21. first limiting groove, 22. first ejector hole, 23. first bolt hole; 3. tail fixture, 31. second limiting groove, 32. second ejector hole, 33. second bolt hole, 34. matching part; 41. lifting beam, 42. lifting ring, 43. lifting hook, 44. lifting rope; 5. measuring instrument, 51. headstock, 52. tailstock, 53. extended ejector. DETAILED DESCRIPTION
[0038] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.
[0039] As mentioned in the background technology, for some large shaft parts, the ejector hole is processed after the machining is completed, which may easily cause the ejector hole to be non-concentric with the shaft diameter, affecting the measurement results, and there is a risk of the finished shaft bumping during machining; Figure 5 As shown, for some large shaft parts, when there is a pin hole and the pin hole is deep, it is necessary to design and manufacture an extended pin 53 in combination with the instrument and the depth of the pin hole. The top locking pin needs to be replaced each time a different shaft part is clamped, and recalibration is required after replacement, which affects the detection efficiency. In the prior art, a set of hooks and ropes are usually used to hoist the hoisting shaft during hoisting, which causes the measured shaft to tilt during hoisting and easily damages the instrument. In addition, during the hoisting and installation process, at least four people are required to assist in each hoisting. Two of them, after the hoisting shaft is in place, first connect the pin hole at the tail end of the shaft with the extended pin 53 of the tailstock of the measuring instrument. After the hoisting shaft is in place, the other two people control the head of the measuring instrument to extend the pin on the head of the measuring instrument to complete the hoisting and installation of the hoisting shaft.
[0040] Embodiment 1
[0041] In a typical implementation of the present invention, reference is made to Figure 1-Figure 7As shown, a hoisting tool for measuring large shaft parts includes a head clamp 2, a tail clamp 3 and a hoist. The head clamp 2 and the tail clamp 3 are respectively used to fix with the top end 11 and the tail end 12 of the hoisting shaft 1. After the fixation, the hoisting shaft 1 is hoisted by the hoist, and the hoisting shaft is vertically hoisted between the head 51 and the tail stock 52 of the measuring instrument 5. The ejector holes on the outer surfaces of the head 51 and the tail stock 52 are supported by the ejector pins on the head 51 and the tail stock 52, and then the measuring instrument 5 is used to measure the hoisting shaft 1.
[0042] As shown in Figures 2(a) and 2(b), it is a schematic diagram of the structure of the head clamp 2, which is used to fix with the top end 11 of the lifting shaft. The head clamp 2 is cylindrical in shape, and a first limiting groove 21 is provided on the side surface of its bottom, and a first ejector hole 22 is provided on the side surface of its top.
[0043] The shape of the first limiting groove 21 is adapted to the shape of the top end 11 of the lifting shaft 1. The first limiting groove 21 is used to cooperate with the top end 11 of the lifting shaft 1. The first ejector hole 22 is used to cooperate with the ejector on the head seat 51 of the measuring instrument 5. The first ejector hole 22 is concentrically arranged with the first limiting groove 21 to ensure that after the lifting shaft 1 is installed, its axis is coaxial with the ejector, thereby ensuring the accuracy of the measurement data.
[0044] It can be understood that the top end 11 and the tail end 12 of the lifting shaft 1 are both provided with part mounting holes. After the first limiting groove 21 is matched with the top end 11 of the shaft, in order to achieve the relative fixation of the head fixture 2 and the top end 11 of the shaft, a plurality of first bolt holes 23 are provided around the first limiting groove 21. As shown in Fig. 2(a) and Fig. 2(b), the first bolt holes 23 are distributed along the annular direction on the head fixture 2. In this embodiment, four first bolt holes 23 are provided. The first bolt holes 23 are provided corresponding to the mounting holes on the top end 11 of the shaft. After the head fixture 2 is matched with the top end 11 of the shaft, the first bolt holes 23 are aligned with the mounting holes on the lifting shaft near the top end 11 of the shaft, and the head fixture 2 is fixed to the top end 11 of the shaft by the bolt assembly.
[0045] As shown in Figures 3(a) and 3(b), the tail clamp 3 has a T-shaped cross-section. The tail clamp 3 includes a mating portion 34 arranged at the center thereof. The mating portion 34 is cylindrical in shape. A second ejector hole 32 is provided at the center of the top end surface of the mating portion 34, and a second limiting groove 31 is provided at the center of the bottom end surface. The second limiting groove 31 and the second ejector hole 32 are also concentrically arranged.
[0046] The second limiting groove 31 is used to cooperate with the shaft tail end 12, and the second ejector hole 32 is used to cooperate with the ejector on the tail seat 52 of the measuring instrument 5. The shape of the second limiting groove 31 is adapted to the shape of the shaft tail end 12 of the lifting shaft 1, and a plurality of second bolt holes 33 are arranged around the second limiting groove 31; the second bolt holes 33 are arranged around the matching portion 34, as shown in Figure 3 (a), the second bolt holes 33 of this embodiment are distributed along the annular direction on the tail clamp 3, and the second bolt holes 33 are arranged corresponding to the mounting holes on the shaft tail end 12. When the second limiting groove 31 is matched with the shaft tail end 12, the mounting holes on the shaft tail end 12 are aligned with the second bolt holes 33, and the bolt assembly is used to achieve fixed matching between the tail clamp 3 and the shaft tail end 12.
[0047] The height of the matching portion 34 of this embodiment is greater than that of the head fixture 2 , so that one end of the matching portion 34 having the second ejector hole 32 can extend into the tailstock 52 of the measuring instrument 5 to match the ejector hole, without providing an extended ejector 53 .
[0048] The setting of the head clamp 2 and the tail clamp 3 of the present embodiment utilizes the existing part installation holes at both ends of the lifting shaft 1. By setting special clamping tools for the top and tail ends of the large lifting shaft (crankshaft), the clamping tools can not only be fixed with the end of the lifting shaft through bolt holes, but also can be matched with the ejector pin on the measuring instrument. There is no need to additionally process the ejector pin hole on the lifting shaft, thereby ensuring the accuracy of the measurement results.
[0049] In the case where the ejector pin hole of the lifting shaft is deep, a matching portion is provided, the matching portion has a set length, and the matching portion is extended into the tailstock of the measuring instrument to match the ejector pin, so that the clamping of the large lifting shaft is no longer affected by the difference in the depth of the ejector pin holes at both ends, and there is no need to provide an extended ejector pin 53, which saves calibration work and improves detection efficiency. In some examples, the relevant structure of the head fixture can also be realized by providing a matching portion.
[0050] like Figure 4 As shown, the sling includes a transversely arranged lifting beam 41, a lifting ring 42 is provided at the middle position of the top side of the lifting beam 41, and hooks 43 are symmetrically provided at both ends of the bottom side, and each group of hooks 43 is used to cooperate with the lifting shaft 1 through a lifting rope 44, one end of the lifting rope is used to be fixedly matched with the lifting hook 43, and the other end is used to be fixedly matched with the lifting shaft 1. Among them, the lifting ring 42 is hinged to the lifting beam 41, and the hook 43 is hinged to the lifting beam 41.
[0051] When the lifting shaft 1 is hoisted and installed before measurement using a lifting device, the lifting ring 42 is used to connect the lifting equipment, and each set of hooks 43 is fixedly connected to the top of the lifting shaft 1 through a set of lifting ropes 44. The state when the lifting shaft 1 is lifted is as follows Figure 6As shown, at this time, the head clamp 2 and the tail clamp 3 are fixed on the top end 11 and the tail end 12 of the lifting shaft 1. The lifting shaft 1 can be transported between the head seat 51 and the tail seat 52 of the measuring instrument by the lifting fixture, and the first ejector hole 22 and the second ejector hole 32 are connected to the corresponding ejector pins, as shown in FIG. Figure 7 shown.
[0052] In order to ensure that the lifting device does not conflict with the measuring instrument headstock, the span of the two sets of hooks 43 on the lifting beam 41 needs to be greater than the width of the measuring instrument headstock 51. The lifting shaft 1 is lifted by the two sets of hooks 43 and the lifting rope 44. When the lifting shaft 1 is lifted and balanced, it is moved to the middle axis position of the measuring instrument 5, and the measured part is fixed and locked by the clamping pins of the headstock 51 and the tailstock 52.
[0053] After the lifting device of this embodiment lifts the lifting shaft 1, the vertical lifting of the part can be achieved by utilizing the deadweight of the part and the symmetrical balance relationship of the lifting device, which can ensure that the measured part does not tilt during lifting, thereby preventing the tilt from damaging the instrument or causing harm to personnel. By using this lifting method, the number of operators can be effectively reduced from the original at least four people to two people to complete the lifting and installation steps when measuring large shaft parts.
[0054] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A lifting tool for measuring large shaft parts, characterized in that: include: A head fixture, one side of which is provided with a first limiting groove for matching the top end of the shaft, and the other side of which is provided with a first ejector hole, the first ejector hole is concentric with the first limiting groove, and a plurality of first bolt holes are provided around the first limiting groove; The tail clamp has a second limiting groove for matching the tail end of the shaft on one side and a second ejector hole on the other side, the second ejector hole is concentric with the second limiting groove, and a plurality of second bolt holes are arranged around the second limiting groove; The sling comprises a lifting beam, a lifting ring is arranged in the middle of one side of the lifting beam, and hooks are symmetrically arranged at both ends of the other side, and the hooks are used to cooperate with the lifting shaft through a lifting rope.
2. A lifting tool for measuring large shaft parts according to claim 1, characterized in that: The shape of the first limiting groove is adapted to the shape of the top end of the hanging shaft.
3. The hoisting tool for measuring large shaft parts according to claim 1, characterized in that: The shape of the second limiting groove is adapted to the shape of the shaft tail end of the hanging shaft.
4. The hoisting tool for measuring large shaft parts according to claim 1, characterized in that: The first bolt holes are distributed in a circumferential direction on the head fixture, and the first bolt holes are arranged corresponding to the mounting holes on the top end of the shaft.
5. The hoisting tool for measuring large shaft parts according to claim 1, characterized in that: The second bolt holes are distributed in a circumferential direction on the tail clamp, and the second bolt holes are arranged corresponding to the mounting holes on the tail end of the shaft.
6. The hoisting tool for measuring large shaft parts according to claim 1, characterized in that: The tail clamp comprises a matching portion, the second limiting groove and the second ejector hole are arranged on both sides of the matching portion, and the matching portion is arranged at the center position of the tail clamp.
7. A lifting tool for measuring large shaft parts according to claim 6, characterized in that: The height of the matching portion is greater than the height of the head fixture.
8. The hoisting tool for measuring large shaft parts according to claim 1, characterized in that: The lifting ring is hinged to the lifting beam, and the lifting hook is hinged to the lifting beam.
9. A lifting tool for measuring large shaft parts according to claim 8, characterized in that: The span of the two groups of hooks on the lifting beam is greater than the width of the measuring instrument head seat.
10. A lifting tool for measuring large shaft parts according to claim 9, characterized in that: One end of the lifting rope is used for fixedly cooperating with the lifting hook, and the other end is used for fixedly cooperating with the lifting shaft.