Eccentric circular hole auxiliary measuring fixture

Abstract

This utility model discloses an auxiliary measuring fixture for eccentric circular holes, relating to the field of roundness testing technology. It includes a sliding seat, a connecting block, and a positioning block. A handle is movably connected to the connecting block, and a support rod and a positioning rod are sequentially arranged collinearly along the handle. A pin passes through the positioning rod, and the support rod passes through the connecting block and is located on the upper surface of the sliding seat. One end of the sliding seat is equipped with a positioning block for clamping the part to be measured, and the other end is connected to the connecting block. A slider is fixedly installed below the sliding seat. A base is located below the sliding seat. The positioning block has a slot, the size of which is clearance-fitted with the base plate of the part to be measured. The upper surface of the base has a sliding groove, which is clearance-fitted with the slider. Beneficial effect: During the detection of eccentric circular holes, i.e., when the part to be measured on the cylinder cannot be concentric with the worktable, this device quickly locates the center of the eccentricity detection component, improving detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of roundness testing technology, and in particular to auxiliary measuring fixtures for eccentric circular holes. Background Technology

[0002] Roundness testing technology is widely used in the inspection of rotating parts and belongs to the field of high-precision inspection. It is especially used for inspecting product parts with high precision requirements.

[0003] The roundness tester's inspection process is relatively simple. The device's worktable fixes the part to be inspected to the center of the worktable using various devices. During operation, the roundness tester's probe contacts the part to be inspected, and then the worktable rotates. The probe's sensor transmits the inspection data back to the computer in real time, and the built-in software performs algorithmic calculations to obtain the desired data.

[0004] However, during the testing process, when the part being tested on the cylinder cannot be kept concentric with the worktable, the existing device cannot quickly locate the center of the eccentric testing part. Summary of the Invention

[0005] The main purpose of this invention is to propose an auxiliary measuring fixture for eccentric circular holes, which aims to solve the technical problem of low efficiency in centering of positioning eccentricity detection components.

[0006] To achieve the above objectives, the present invention proposes an auxiliary measuring fixture for eccentric circular holes, comprising a sliding seat, a connecting block, and a positioning block;

[0007] A handle is movably connected to the connecting block. A support rod and a positioning rod are arranged sequentially along the collinearity of the handle. A pin is passed through the positioning rod. The support rod passes through the connecting block and is located on the upper end face of the sliding seat.

[0008] One end of the sliding seat is equipped with a positioning block for clamping the part to be tested, and the other end is connected to a connecting block; a slider is fixedly installed below the sliding seat; a base is provided below the sliding seat.

[0009] The positioning block is provided with a slot, the size of which is matched with the clearance of the base plate of the part to be measured;

[0010] The upper surface of the base is provided with a sliding groove, which is in clearance fit with the slider.

[0011] In one embodiment, a support frame is provided on the connecting block, and a handle is hinged to the support frame.

[0012] In one embodiment, the cross-section of the slider is a trapezoid or convex shape that is narrower at the top and wider at the bottom.

[0013] In one embodiment, a locking block is connected to the lower part of the support rod, the cross-section of the locking block is designed to be non-circular, and a pad is provided below the locking block.

[0014] In one embodiment, a fourth blind hole is provided in the middle of the upper end face of the slider, and a third blind hole is provided in the lower end face of the sliding seat corresponding to the fourth blind hole. The third blind hole and the fourth blind hole are connected by a second positioning pin. The fourth blind hole of the slider is located at the center point, and the threaded holes on the slider are arranged in a centrally symmetrical manner.

[0015] In one embodiment, the upper surface of the base is provided with two parallel sliding grooves, which are mirror-symmetrical about the center of the base.

[0016] In one embodiment, the assembly structure of the positioning block and the sliding seat is as follows:

[0017] The sliding seat has a second blind hole at its end;

[0018] The positioning block has a first blind hole at the corresponding position;

[0019] The first blind hole and the second blind hole are inserted into the first positioning pin.

[0020] In one embodiment, the upper surface of the base is provided with scale lines indicating the position of the sliding seat.

[0021] In one embodiment, the positioning block is installed vertically or horizontally relative to the sliding seat.

[0022] The technical solution of this utility model involves fixing the positioning block and the sliding seat; then installing the slider and the sliding seat; then inserting the support rod into the round hole on the sliding seat; and finally fixing the connecting block to the sliding seat.

[0023] The position of the positioning block is determined based on the eccentricity of the hole to be measured, thereby determining the position of the sliding seat. The slider is moved into the base along the slide groove. After the positioning block reaches the designated position, the handle is turned down. After the handle presses against the support rod, the slider is lifted up, so that the slider presses against the slide groove, thus fixing the sliding seat. At this time, the handle is located in the positioning rod, completing the limit of the handle, thereby fixing the sliding seat. The base and the base screw are then fixedly connected.

[0024] The part to be tested is slid into the slot, and then the screw is inserted into the positioning block along the pressure plate to fix the part. The cylindricity measurement begins. During the test, when the part to be tested on the cylinder cannot be kept concentric with the worktable, this device quickly locates the center of the eccentric detection component to improve the testing efficiency. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the eccentric circular hole auxiliary measuring tooling provided by this utility model;

[0027] Figure 2 A top view of one embodiment of the eccentric circular hole auxiliary measuring fixture provided by this utility model;

[0028] Figure 3 A first exploded view of the limiting component in one embodiment of the eccentric circular hole auxiliary measuring tooling provided by this utility model;

[0029] Figure 4 A second exploded view of the limiting component in one embodiment of the eccentric circular hole auxiliary measuring fixture provided by this utility model;

[0030] Reference numerals in the attached drawings: 1. Part; 2. Positioning block; 21. Slot; 22. Pressure plate; 24. First blind hole; 242. First positioning pin; 3. Support rod; 31. Step; 312. Washer; 32. Locking block; 322. Pad block; 4. Sliding seat; 401. Second blind hole; 402. Third blind hole; 41. Sliding block; 411. Fourth blind hole; 412. Second positioning pin; 42. Connecting block; 421. Handle; 422. Support frame; 424. Positioning rod; 4242. Pin hole; 4244. Pin rod; 5. Base; 52. Slide groove; 54. Scale line; 6. Base.

[0031] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0033] It should be noted that if any directional indication (such as up, down, left, right, front, back, etc.) is involved in the embodiments of this utility model, such directional indication is only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0034] Furthermore, if the embodiments of this utility model involve descriptions such as "first," "second," etc., these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Furthermore, the use of "and / or" or "and / or" throughout the text includes three parallel options; for example, "A and / or B" includes option A, option B, or options where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0035] The auxiliary measuring fixture for eccentric circular holes proposed in this utility model includes a sliding seat, a connecting block, and a positioning block;

[0036] A handle is movably connected to the connecting block. A support rod and a positioning rod are arranged sequentially along the collinearity of the handle. A pin is passed through the positioning rod. The support rod passes through the connecting block and is located on the upper end face of the sliding seat.

[0037] One end of the sliding seat is equipped with a positioning block for clamping the part to be tested, and the other end is connected to a connecting block; a slider is fixedly installed below the sliding seat; a base is provided below the sliding seat.

[0038] The positioning block is provided with a slot, the size of which is matched with the clearance of the base plate of the part to be measured;

[0039] The upper surface of the base is provided with a sliding groove, which is in clearance fit with the slider.

[0040] In one embodiment, a support frame is provided on the connecting block, and a handle is hinged to the support frame.

[0041] In one embodiment, the cross-section of the slider is a trapezoid or convex shape that is narrower at the top and wider at the bottom.

[0042] In one embodiment, a locking block is connected to the lower part of the support rod, the cross-section of the locking block is designed to be non-circular, and a pad is provided below the locking block.

[0043] In one embodiment, a fourth blind hole is provided in the middle of the upper end face of the slider, and a third blind hole is provided in the lower end face of the sliding seat corresponding to the fourth blind hole. The third blind hole and the fourth blind hole are connected by a second positioning pin. The fourth blind hole of the slider is located at the center point, and the threaded holes on the slider are arranged in a centrally symmetrical manner.

[0044] In one embodiment, the upper surface of the base is provided with two parallel sliding grooves, which are mirror-symmetrical about the center of the base.

[0045] In one embodiment, the assembly structure of the positioning block and the sliding seat is as follows:

[0046] The sliding seat has a second blind hole at its end;

[0047] The positioning block has a first blind hole at the corresponding position;

[0048] The first blind hole and the second blind hole are inserted into the first positioning pin.

[0049] In one embodiment, the upper surface of the base is provided with scale lines indicating the position of the sliding seat.

[0050] In one embodiment, the positioning block is installed vertically or horizontally relative to the sliding seat.

[0051] This fixture provides an auxiliary measuring fixture for eccentric circular holes. The roundness measuring instrument used with this fixture is the Mitutoyo Precision Cylindricity Measuring Instrument RA-2200AH, which can accommodate an eccentricity of 0.4mm. The device includes a base 6, on which a base 5 is mounted. The upper surface of the base 5 has two sliding grooves 52, the cross-section of which is trapezoidal. The two sliding grooves 52 are point-symmetrical with the center of the base 5. A slider 41 is correspondingly mounted in the sliding groove 52. The cross-section of the slider 41 is trapezoidal. A fourth blind hole 411 is provided in the middle of the upper surface of the slider 41. A sliding seat 4 is provided above the slider 41. A third blind hole 402 is provided on the lower surface of the sliding seat 4 corresponding to the fourth blind hole 411. The third blind hole 402 and the fourth blind hole 411 are connected by a second positioning pin 412, which makes the spacing between adjacent sliders 41 precise and ensures that the slider 41 can slide stably into the sliding groove 52 without jamming. In addition, the sliding seat 4 and the slider 41 are fixedly connected by screws.

[0052] The base 5 is provided with scale lines 54, which facilitates the adjustment of the position of the sliding seat 4 so that the round hole on the part to be tested 1 is coaxial with the base 5.

[0053] The base 5 is connected to the base 6 of the roundness meter with screws, making it easy to put on and take off the base 5.

[0054] The upper end of the sliding seat 4 is provided with a second blind hole 401, and a threaded through hole is provided collinearly with the second blind hole 401. The sliding seat 4 is provided with a positioning block 2. The upper and lower ends of the positioning block 2 are provided with a first blind hole 24 corresponding to the second blind hole 401. The first blind hole 24 and the second blind hole 401 are connected by a first positioning pin 242. The upper and lower ends of the positioning block 2 are provided with threaded holes corresponding to the threaded through hole. The screw passes through the threaded through hole and enters the threaded hole to complete the fixation of the sliding seat 4 and the positioning block 2. The positioning through the blind hole makes the relative position relationship between the positioning block 2 and the sliding seat 4 more accurate, improves the accuracy of the roundness tester, and reduces the positioning time of the roundness tester.

[0055] The positioning block 2 is provided with a slot 21. The width of the slot 21 is matched with the width of the part to be tested 1 with a clearance. The clearance on one side is less than 50μm. Pressure plates 22 are provided on both sides of the slot 21. The pressure plates 22 are connected to the positioning block 2 with screws. The upper and lower ends of the pressure plates 22 are provided with screw holes to enhance the stability of the part to be tested 1 and prevent the part to be tested 1 from being displaced during testing.

[0056] The other end of the sliding seat 4 is provided with a connecting block 42. A through hole is provided through the center of the connecting block 42. A support rod 3 is provided in the through hole. The upper part of the support rod 3 is oblong and the lower part of the support rod 3 is circular. A step 31 is provided at the connection between the upper and lower parts of the support rod 3. A gasket 312 is provided on the step 31. The gasket 312 is made of rubber.

[0057] A rectangular locking block 32 is coaxially mounted at the lower end of the support rod 3. Below the locking block 32 is a pad 322 made of rubber. The use of rubber in both the pad 312 and the pad 322 serves two purposes: firstly, to reduce wear on the support rod 3 and the locking block 32 during use; and secondly, to prevent localized stress concentration caused by line contact between the handle 421 and the support rod 3, which could lead to deformation of the support rod 3 or the handle 421.

[0058] A support frame 422 is provided on the upper side of the connecting block 42. A handle 421 is hinged to the support frame 422. Two through holes are provided on the handle 421 along the same line. One through hole cooperates with the support rod 3, and the other through hole cooperates with the positioning rod 424. The positioning rod 424, the support rod 3, and the handle 421 are designed to be along the same line. The positioning rod 424 is fixedly connected to the connecting block 42. The positioning rod 424 is provided with at least one pin hole 4242. When the handle 421 enters the positioning rod 424, the pin 4244 is inserted into the pin hole 4242 to complete the fixation of the positioning rod 424.

[0059] Preferred embodiment 1: The cross-section of the slider 41 can be trapezoidal or convex. As long as it is narrow at the top and wide at the bottom, it can achieve the shape that allows the slider 41 and the groove 52 to abut together, so as to achieve the technical effect of fixing the sliding seat 4 on the base 5.

[0060] Preferred embodiment 2: The shape of the locking block 32 can be set as a non-circular design such as rectangle or triangle, the purpose of which is to assist in the positioning of the support rod 3. Because the handle 421 needs to pass smoothly through the support rod 3, the upper end of the long oval of the support rod 3 needs to be collinear with the handle 421. Therefore, the locking block 32 is used to help the staff to position the support rod 3 during installation.

[0061] Preferred embodiment three: The base 5 is provided with scale lines 54, which facilitates the positioning of the sliding seat 4 on the base 5 and improves the positioning efficiency of the staff.

[0062] Preferred embodiment four: The fourth blind hole 411 of the slider 41 is located at the center of the slider 41, and the threaded holes on the slider 41 are symmetrically arranged with respect to the center of the slider 41, so that any slider 41 can be installed into any groove 52 by simply changing its direction, without needing to distinguish the correspondence between the slider 41 and the groove 52, thus improving work efficiency.

[0063] Preferred embodiment 5: The positioning blocks 2 of different sizes can be replaced to adapt to the test parts 1 of different sizes. The difference between the different positioning blocks 2 lies in the width and thickness of the slot 21.

[0064] Preferred embodiment six: The positioning block 2 can be vertically or horizontally set with the sliding seat 4 to accommodate different eccentric parts 1. When set horizontally, the positioning block 2 is simply rotated 90° clockwise in an L-shape on the side closest to the sliding seat 4. By horizontally connecting the positioning block 2 and the sliding seat 4, it can accommodate the situation where the base plate and the circular hole of the part to be tested are symmetrical. Therefore, this fixture can accommodate parts 1 of various sizes and structures, greatly improving the efficiency of testing the cylindricity of various eccentric parts 1.

[0065] Preferred embodiment seven: Anti-slip texture can be provided on the handle 421 to facilitate the grip and rotation of the staff.

[0066] Preferred embodiment eight: The upper end face of the support rod 3 can be set as a circular concave surface, that is, the top of the support rod 3 fits and abuts against the side of the handle 421.

[0067] Working principle:

[0068] The first step is the installation of the tooling:

[0069] The positioning block 2 and the sliding seat 4 are first positioned by the first blind hole 24 and the second blind hole 401 and the first positioning pin 242, and then connected by screws to fix the positioning block 2 and the sliding seat 4.

[0070] Then install slider 41 and sliding seat 4. First, position them with the second positioning pin 412 through the third blind hole 402 and the fourth blind hole 411. Then connect them with screws to fix slider 41 and sliding seat 4.

[0071] Then insert the support rod 3 into the through hole on the sliding seat 4, and then fix the connecting block 42 to the sliding seat 4.

[0072] Step 2, tooling positioning:

[0073] The position of the positioning block 2 is determined based on the eccentricity of the hole to be measured, thereby determining the position of the sliding seat 4. The slider 41 is moved into the base 5 along the slide groove 52. After the positioning block 2 reaches the designated position by comparing with the scale line 54, the handle 421 is rotated downwards. After the handle 421 presses against the step 31 on the support rod 3, the slider 41 will be lifted upwards, so that the slider 41 presses against the slide groove 52, thus completing the fixation of the sliding seat 4. Then, the handle 421 is rotated into the positioning rod 424, and the pin 4244 is inserted into the pin hole 4242 to complete the limit of the handle 421, thus completing the fixation of the sliding seat 4. The base 5 and the base 6 are fixedly connected with screws.

[0074] Step 3, Installation of Part 1:

[0075] Slide the part to be tested 1 into the slot 21, then insert the screw into the positioning block 2 along the pressure plate 22 to fix the part 1, and start the cylindricity measurement. Then repeat the third step.

[0076] It should be understood that the terms "one embodiment" or "one example" throughout the specification mean that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in one example" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also recognize that the embodiments described in the specification are optional embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0077] In various embodiments of this utility model, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of this utility model embodiment.

[0078] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, or they may sometimes be executed in reverse order, depending on the functions involved. It is particularly important to note that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0079] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An eccentric circular hole auxiliary measuring fixture, characterized in that: It includes a sliding seat (4), a connecting block (42), and a positioning block (2); A handle (421) is movably connected to the connecting block (42). A support rod (3) and a positioning rod (424) are arranged in sequence along the collinearity of the handle (421). A pin (4244) is passed through the positioning rod (424). The support rod (3) passes through the connecting block (42) and is located on the upper end face of the sliding seat (4). One end of the sliding seat (4) is equipped with a positioning block (2) for clamping the part to be tested, and the other end is connected to a connecting block (42); a slider (41) is fixedly installed below the sliding seat (4); a base (5) is provided below the sliding seat (4); The positioning block (2) is provided with a slot (21), and the size of the slot (21) is in clearance fit with the bottom plate (1) of the part to be measured; The upper surface of the base (5) is provided with a sliding groove (52), and the sliding groove (52) is in clearance fit with the slider (41).

2. The eccentric circular hole auxiliary measuring fixture as described in claim 1, characterized in that: A support frame (422) is provided on the connecting block (42), and a handle (421) is hinged on the support frame (422).

3. The eccentric circular hole auxiliary measuring fixture as described in claim 1, characterized in that: The cross-section of the slider (41) is a trapezoid or convex shape that is narrow at the top and wide at the bottom.

4. The eccentric circular hole auxiliary measuring fixture as described in claim 1, characterized in that: A locking block (32) is connected to the bottom of the support rod (3). The cross-section of the locking block (32) is designed to be non-circular. A pad (322) is provided below the locking block (32).

5. The eccentric circular hole auxiliary measuring fixture as described in claim 1, characterized in that: The upper end face of the slider (41) is provided with a fourth blind hole (411), and the lower end face of the sliding seat (4) is provided with a third blind hole (402) corresponding to the fourth blind hole (411). The third blind hole (402) and the fourth blind hole (411) are connected by a second positioning pin (412). The fourth blind hole (411) of the slider (41) is located at the center point, and the threaded holes on the slider (41) are arranged in a centrally symmetrical manner.

6. The eccentric circular hole auxiliary measuring fixture as described in claim 1, characterized in that: The upper surface of the base (5) is provided with two parallel sliding grooves (52), and the two sliding grooves (52) are mirror symmetrical about the center of the base (5).

7. The eccentric circular hole auxiliary measuring fixture as described in claim 1, characterized in that: The assembly structure of the positioning block (2) and the sliding seat (4) is as follows: The sliding seat (4) has a second blind hole (401) at its end; The positioning block (2) has a first blind hole (24) at the corresponding position; The first blind hole (24) and the second blind hole (401) are inserted into the first positioning pin (242).

8. The eccentric circular hole auxiliary measuring fixture as described in claim 1, characterized in that: The upper surface of the base (5) is provided with scale lines (54) indicating the position of the sliding seat (4).

9. The eccentric circular hole auxiliary measuring fixture as described in claim 1, characterized in that: The positioning block (2) is installed vertically or horizontally relative to the sliding seat (4).

Images