A connecting rod dead center measuring tool

Abstract

The utility model discloses a connecting rod mechanism dead point measuring tool, including base, measuring block, first locating rod, second locating rod and dial indicator, the base upper end is equipped with the limit groove, and the limit groove groove bottom and base bottom surface are all horizontally established, and the measuring block can embed in the limit groove, the limit groove groove bottom is equipped with the recess that the opening faces upwards, and the recess groove bottom is horizontally established, and the dial indicator detachably installs on the measuring block upper end surface, and the measuring rod of dial indicator can pass through the measuring block and recess groove bottom contact, first locating rod, second locating rod are located dial indicator's both sides respectively, and first locating rod, second locating rod one end can all horizontally insert in the measuring block, and the other end all stretches out in the side surface of measuring block. The scheme simple structure, convenient to use, convenient to measure the car door seat actuator connecting rod mechanism dead point clearance value, and the measuring efficiency is high.

Description

Technical Field

[0001] This utility model belongs to the field of measurement technology, specifically relating to a tool for measuring the dead point of a linkage mechanism. Background Technology

[0002] Currently, during the assembly and overhaul of Guangzhou Metro's B5 type electric multiple units, it is necessary to check the dead point clearance (1mm~4mm) of the door seat actuator linkage mechanism. The common measurement method is to use a steel ruler across the linkage mechanism and then use a feeler gauge to measure the gap between the steel ruler and the measuring point of the mechanism to complete the data measurement. However, after the door and side panels are closed, the measuring opening is only about 150mm×200mm, and the height is only 200mm. This may cause measurement angle and visual deviation during measurement, which cannot effectively guarantee the measurement quality. The process requires both hands to be inserted into the measuring opening at the same time, and the thickness of the feeler gauge needs to be constantly adjusted, resulting in low measurement efficiency.

[0003] Therefore, a new technology is needed to solve the problems of inconvenience in measuring the dead point of the linkage mechanism and low measurement efficiency in the existing technology during the cleaning process. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides a linkage mechanism dead point measuring tool, which facilitates the measurement of the dead point clearance value of the door actuator linkage mechanism and has high measurement efficiency.

[0005] The present invention adopts the following technical solution: A dead-point measuring tool for a linkage mechanism includes a base, a measuring block, a first positioning rod, a second positioning rod, and a dial indicator. The base has a limiting groove at its upper end, with the bottom of the groove and the base bottom surface both horizontally aligned. The measuring block can be embedded within the limiting groove. The bottom of the limiting groove has an upward-opening recess, with the recess bottom horizontally aligned. The dial indicator is detachably mounted on the upper surface of the measuring block, and its measuring rod can pass through the measuring block and contact the bottom of the recess. The first positioning rod and the second positioning rod are located on opposite sides of the dial indicator, with one end of each rod horizontally inserted into the measuring block and the other end extending from the side of the measuring block.

[0006] As a further improvement to the technical solution of this utility model, the upper end of the base is provided with a first limiting block and a second limiting block. The first limiting block, the base, and the second limiting block are connected in sequence to form the limiting groove with a cross-section of U. The two sides of the first limiting block and the second limiting block that are arranged opposite to each other form the two opposite sidewalls of the limiting groove.

[0007] As a further improvement to the technical solution of this utility model, the upper end face of the measuring block is provided with a mounting hole, the mounting hole is used to install the bushing of the dial indicator, and the lower end of the dial indicator can extend out of the dial indicator bushing and be detachably fixedly connected to the measuring block.

[0008] As a further improvement to the technical solution of this utility model, it also includes a locking bolt, one end of which is horizontally inserted into the measuring block and abuts against the outer surface of the dial indicator bushing for fixation, and the measuring block is provided with a bolt hole on which the locking bolt can be screwed in.

[0009] As a further improvement to the technical solution of this utility model, the measuring block is also provided with a first positioning hole and a second positioning hole at intervals. The first positioning hole and the second positioning hole are respectively located on both sides of the bolt hole on the horizontal plane, and the axes of the first positioning hole and the second positioning hole are located on the same horizontal plane.

[0010] As a further improvement to the technical solution of this utility model, the measuring block includes a first plate and a second plate that are perpendicular to each other and fixedly connected. The first plate is horizontally arranged and inserted into the limiting groove, with its bottom surface in close contact with the bottom of the limiting groove. The upper end of the second plate is fixedly connected to the bottom surface of the first plate, and the side of the second plate near the first plate can contact the side of the base. The first positioning hole, the second positioning hole, the mounting hole, and the bolt hole are all located on the first plate.

[0011] As a further improvement to the technical solution of this utility model, the first plate and the second plate are fixedly connected in an inverted L-shape.

[0012] As a further improvement to the technical solution of this utility model, a protrusion is provided on a vertical side away from the second plate.

[0013] As a further improvement to the technical solution of this utility model, the lengths of the first positioning rod and the second positioning rod are both greater than the width of the first plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: Before measurement, the dial indicator of the linkage dead point measuring tool in this solution is adjusted and calibrated to the "zero" position. Measurement can then begin. During measurement, it only requires one-handed operation, placing the tool directly on the linkage mechanism. Once stable, the torque value can be read directly without needing to adjust the feeler gauge thickness multiple times. The linkage dead point measuring tool has a simple structure, is easy to use, and is convenient for measuring the dead point clearance value of the door actuator linkage mechanism. It also has high measurement efficiency, which can significantly improve work efficiency and reduce the labor intensity of employees. Attached Figure Description

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 This is a schematic diagram of the overall structure of this utility model (partial perspective); Figure 2 This is the front view of the base; Figure 3 This is a top view of the base; Figure 4 This is a schematic diagram of the dial indicator structure; Figure 5 This is a perspective view of the connection structure between the measuring block and the locking bolt; Figure 6 This is a side view of the measuring block; Figure 7 This is an exploded top view of the structure connecting the measuring block with the first positioning rod, the second positioning rod, and the locking bolt.

[0016] Figure label: 1-Base; 11-Limiting groove; 12-Groove; 13-First limiting block; 14-Second limiting block; 2-Measuring block; 21-First plate; 211-First positioning hole; 212-Second positioning hole; 213-Mounting hole; 214-Bolt hole; 215-Protrusion; 22-Second plate; 3-Dial indicator; 31-Bushing; 32-Measuring rod; 4-First positioning rod; 5-Second positioning rod; 6- Locking bolt. Detailed Implementation

[0017] The following will provide a clear and complete description of the concept, specific structure, and technical effects of this utility model in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of this utility model. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0018] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or it can be indirectly fixed or connected to the other feature. Furthermore, the descriptions of "upper," "lower," "left," and "right" used in this utility model are only relative to the relative positional relationships of the various components of this utility model in the accompanying drawings.

[0019] Reference Figures 1 to 7A dead-point measuring tool for a linkage mechanism includes a base 1, a measuring block 2, a first positioning rod 4, a second positioning rod 5, and a dial indicator 3. The base 1 is a standard base 1, with a limiting groove 11 at its upper end. The bottom of the limiting groove 11 is horizontally aligned with the bottom surface of the base 1. The measuring block 2 is located within the limiting groove 11, or it can be partially embedded in or placed within the limiting groove 11. The upper surface of the measuring block 2 and its lower surface in contact with the bottom of the limiting groove 11 are both horizontally aligned. The bottom of the limiting groove 11 has an upward-opening groove 12, which is horizontally aligned. The dial indicator 3 is detachably fixedly mounted on the upper surface of the measuring block 2 and located at the center of the measuring block 2's length direction, i.e., at half its length. The measuring rod 32 at the lower end of the dial indicator 3 can vertically downward through the measuring block 2 and contact the bottom of the groove 12. The first positioning rod 4 and the second positioning rod 5 are located on both sides of the dial indicator 3. One end of each positioning rod 4 and the second positioning rod 5 can be horizontally inserted into the measuring block 2, and the other end extends out of the side of the measuring block 2. The length of each positioning rod 4 and the second positioning rod 5 is greater than the width of the measuring block 2. The base 1 and the measuring block 2 can preferably be made of stainless steel, such as general-purpose austenitic stainless steel.

[0020] Before measurement, adjust dial indicator 3 and calibrate it to the "zero" position. Then you can start the measurement. During the measurement, you only need to operate it with one hand once. Place it directly on the linkage mechanism. After it is stable, you can directly read the number of torques. There is no need to adjust the feeler gauge thickness multiple times. The linkage mechanism dead point measuring tool has a simple structure and is easy to use. It can greatly improve work efficiency and reduce the labor intensity of employees.

[0021] When assembling the dead-point measuring tool of this linkage mechanism, first install the first positioning rod 4, the second positioning rod 5, the dial indicator 3 bushing 31, and the locking bolt 6 on the measuring block 2. These components can generally be assembled on the measuring block 2 for a long time and do not need to be removed unless there is a malfunction. Then install the dial indicator 3 and slightly tighten it with the locking bolt 6. Next, install the measuring block 2 on the standard base 1, adjust the dial indicator 3 to 0, and lock the dial indicator 3 to the measuring block 2 with the locking bolt 6. During measurement, place the measuring tool directly on the linkage mechanism of the door seat actuator. Use the measuring block 2 to position itself at a right angle above the linkage mechanism. Use the first positioning rod 4, the second positioning rod 5, and the adjusting bolt of the linkage mechanism to position the axial direction of the measuring tool. The axial positioning of the measuring tool can be achieved by contacting the outer side of the first positioning rod 4 or the second positioning rod 5 with the adjusting bolt of the linkage mechanism. Balance / move or push the measuring tool, and keep it balanced and fixed. When the measuring tool is placed directly at the measuring position, position 22 may not be close to the side of the connecting rod, causing errors. Moving the measuring tool forward or left or right can eliminate the gap between position 22 and the side of the connecting rod. Balancing / moving or pushing the measuring tool can also eliminate errors. When the pointer of dial indicator 3 is stable, the value of dial indicator 3 can be read. Subtracting the value of dial indicator 3 from 4mm gives the dead point clearance value of the door seat actuator connecting rod mechanism. When dial indicator 3 is a reverse dial indicator 3 or an electronic dial indicator 3, the corresponding clearance value can be directly read from the dial indicator 3.

[0022] Specifically, the upper end of the base 1 is provided with a first limiting block 13 and a second limiting block 14. The first limiting block 13, the base 1, and the second limiting block 14 are connected in sequence to form the limiting groove 11 with a cross-section of U. The two opposite sides of the first limiting block 13 and the second limiting block 14 form the two opposite sidewalls of the limiting groove 11. The two ends of the measuring block 2 do not contact the first limiting block 13 and the second limiting block 14. If the first limiting block 13 and the second limiting block 14 contact the measuring block 2, it cannot be placed flat, resulting in incorrect adjustment of the dial indicator.

[0023] Specifically, the upper surface of the measuring block 2 is provided with a mounting hole 213. The mounting hole 213 is used to install the dial indicator 3 bushing 31 or the dial indicator 3 pressure sleeve. The measuring rod 32 at the lower part of the dial indicator 3 can extend out of the dial indicator 3 bushing 31 and contact the bottom of the groove 12. The dial indicator 3 is detachably fixed to the measuring block 2 through the dial indicator 3 bushing 31. The measuring rod 32 at the lower part of the dial indicator 3 is inserted into the groove 12 of the measuring block 2. This part contacts the measuring block 2. The purpose of this contact is to set the zero value of the dial indicator; without contact, the reading will be inaccurate. The function of the groove 12 is to set the maximum value at the dead point to zero. The dial indicator 3 bushing 31 is made of copper and has an interference fit with the mounting hole 213. The locking bolt 6 is connected to the measuring block 2 by a threaded connection. The locking bolt 6 is connected to the dial indicator 3 or the dial indicator 3 bushing by pressing the bushing 31 with the locking bolt, which in turn presses the dial indicator 3 with the bushing 31.

[0024] Specifically, the dead-point measuring tool for the linkage mechanism in this solution also includes a locking bolt 6. One end of the locking bolt 6 is horizontally inserted into the measuring block 2 and abuts against the outer surface of the bushing 31 of the dial indicator 3 for fixation. The measuring block 2 is horizontally provided with a bolt hole 214 into which the locking bolt 6 can be screwed. The locking bolt 6 is used to fix the dial indicator 3 to the measuring block 2. During assembly, the base 1 can be placed on a horizontal platform first, the measuring block 2 can be placed on the base 1 and inserted into the limiting groove 11, and then the dial indicator 3 can be inserted into the upper end of the measuring block 2. After zeroing the dial indicator 3, the dial indicator 3 can be fixed to the measuring block 2 by the locking bolt 6.

[0025] Specifically, the measuring block 2 is also provided with a first positioning hole 211 and a second positioning hole 212 at intervals. The first positioning hole 211 and the second positioning hole 212 are located on both sides of the bolt hole 214 on the horizontal plane. The axes of the first positioning hole 211 and the second positioning hole 212 are located on the same horizontal plane. The measuring block 2 and the base 1 do not need to be fixed and can be placed flat directly. The base 1 is used to set the zero value of the dial indicator.

[0026] Specifically, the measuring block 2 includes a first plate 21 and a second plate 22 that are perpendicular to each other and fixedly connected. The first plate 21 is horizontally positioned and inserted into the limiting groove 11, with its bottom surface in close contact with the bottom of the limiting groove 11. The upper end of the second plate 22 is fixedly connected to the bottom surface of the first plate 21, and the side of the second plate 22 closest to the first plate 21 can contact the side of the base 1. The first positioning hole 211, the second positioning hole 212, the mounting hole 213, and the bolt hole 214 are all located on the first plate 21. The lengths of the first positioning rod 4 and the second positioning rod 5 are both greater than the width of the first plate 21. The function of the first positioning rod 4 and the second positioning rod 5 is for positioning during measurement. The axial positioning of the measuring tool can be achieved by the contact between the outer side of the first positioning rod 4 or the second positioning rod 5 and the adjusting rod of the linkage mechanism.

[0027] Specifically, the first plate 21 and the second plate 22 are fixedly connected in an inverted L-shape. In use, the bottom surface of the first plate 21 is close to the bottom of the limiting groove 11, and the side of the second plate 22 near the first plate 21 is close to the side of the base 1.

[0028] Specifically, a protrusion 215 is horizontally provided on a vertical side of the first plate 21 away from the second plate 22. The protrusion 215 corresponds to the mounting hole 213. When the width of the first plate 21 is narrow, the protrusion 215 ensures that the first plate 21 has sufficient width or volume to accommodate the mounting hole 213. The protrusion 215 is used to position the hole 213; without it, the hole 213 would intersect with the edge. If the protrusion 215 is not provided, and the entire width is flush with it, interference will occur during measurement.

[0029] The dead-point measuring tool for the linkage mechanism in this solution fully considers the structural characteristics of the dead-point clearance of the door actuator linkage mechanism of the Guangzhou Metro B5 electric multiple unit, realizing the feasibility of measuring the dead-point clearance of the door actuator linkage mechanism, and avoiding measurement angle and visual deviation during measurement, thereby improving the accuracy of the measurement. This measuring tool can be operated with one hand, improving work efficiency, saving working time, and reducing the labor intensity of employees.

[0030] Other aspects of the linkage mechanism dead point measuring tool described in this utility model are available in the prior art and will not be repeated here.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A tool for measuring the dead point of a linkage mechanism, characterized in that: The device includes a base, a measuring block, a first positioning rod, a second positioning rod, and a dial indicator. The base has a limiting groove at its upper end, with the bottom of the groove and the base bottom surface both horizontally aligned. The measuring block can be embedded within the limiting groove. The bottom of the limiting groove has an upward-opening recess, with the bottom of the recess horizontally aligned. The dial indicator is detachably mounted on the upper surface of the measuring block, and the measuring rod of the dial indicator can pass through the measuring block and contact the bottom of the recess. The first positioning rod and the second positioning rod are located on opposite sides of the dial indicator, with one end of each rod horizontally inserted into the measuring block and the other end extending from the side of the measuring block.

2. The linkage mechanism dead point measuring tool according to claim 1, characterized in that: The upper end of the base is provided with a first limiting block and a second limiting block. The first limiting block, the base, and the second limiting block are connected in sequence to form the limiting groove with a cross-section of U. The two sides of the first limiting block and the second limiting block that are arranged opposite to each other form the two opposite sidewalls of the limiting groove.

3. The linkage mechanism dead point measuring tool according to claim 2, characterized in that: The upper surface of the measuring block is provided with a mounting hole, in which a bushing of the dial indicator is installed. The lower end of the dial indicator can extend out of the bushing and be detachably and fixedly connected to the measuring block.

4. The linkage mechanism dead point measuring tool according to claim 3, characterized in that: It also includes a locking bolt, one end of which is horizontally inserted into the measuring block and abuts against the outer surface of the dial indicator bushing for fixation. The measuring block is provided with a bolt hole on a horizontal surface into which the locking bolt can be screwed.

5. The linkage mechanism dead point measuring tool according to claim 4, characterized in that: The measuring block is also provided with a first positioning hole and a second positioning hole at intervals. The first positioning hole and the second positioning hole are located on both sides of the bolt hole on the horizontal plane, and the axes of the first positioning hole and the second positioning hole are located on the same horizontal plane.

6. The linkage mechanism dead point measuring tool according to claim 5, characterized in that: The measuring block includes a first plate and a second plate that are perpendicular to each other and fixedly connected. The first plate is horizontally set and inserted into the limiting groove, with its bottom surface in close contact with the bottom of the limiting groove. The upper end of the second plate is fixedly connected to the bottom surface of the first plate, and the side of the second plate closer to the first plate can contact the side of the base. The first positioning hole, the second positioning hole, the mounting hole, and the bolt hole are all located on the first plate.

7. The linkage mechanism dead point measuring tool according to claim 6, characterized in that: The first plate and the second plate are fixedly connected in an inverted L-shape.

8. The linkage mechanism dead point measuring tool according to claim 7, characterized in that: A protrusion is horizontally protruding on a vertical side away from the second plate on the first plate.

9. The linkage mechanism dead point measuring tool according to claim 8, characterized in that: The lengths of both the first positioning rod and the second positioning rod are greater than the width of the first plate.

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