Simple tool for high-precision depth measurement

Abstract

The utility model relates to the technical field of micro motor casing stamping manufacturing, in particular to a simple tool for high-precision depth measurement, which comprises a cylindrical mounting block, a stop block hole and a gauge head rod hole are arranged on the axis of the mounting block, the stop block hole and the gauge head rod hole are respectively positioned at two ends of the mounting block and are internally communicated, and a detection rod is accommodated in the mounting block and is in a rod shape. The rod body is matched with the gauge head rod hole, an annular check block is integrally formed on the periphery of the rod body, the check block is matched with the check block hole, a linear bearing is further arranged in the check block hole and arranged on the periphery of the detection rod in a sleeving mode, and a steel wire spring is arranged at the bottom of the check block hole. In order to reduce the left-right deflection error of a measuring head extension rod, the measuring head extension rod and a scale fixing seat are generally required to be produced in a matched manner, the requirement on the inner diameter precision of the scale fixing seat is high, and parts with high inner diameter precision are high in manufacturing cost, are not suitable for mass production and use, and are high in maintenance cost.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping manufacturing of micro motor casings, and particularly relates to a simple tooling for accurately measuring depth. Background Art

[0002] Under the general trend of the gradual development and growth of the new energy industry, the production and manufacturing technologies of motors are also booming, and the accuracy requirements for the production and manufacturing of motors are gradually increasing. Among the important measurement parameters of motors, depth is included. The depth is usually measured by a desktop coordinate measuring device. This device has high measurement accuracy, but it takes a long time. It is necessary to move the measured part to the coordinate measuring device, which is time-consuming and laborious, and extremely affects production efficiency. Therefore, the coordinate measuring device is generally used for sampling inspection of products, while conventional detection uses a simple detection tooling. This detection tooling can be directly detected by operators on the production line, so it has the effect of quick judgment and rough inspection and screening. However, since this detection tooling needs to be used by operators and has a small measuring range, the detection accuracy is low, and it still cannot be used for high-precision products and can only be used as reference data.

[0003] In a device dedicated to measuring the depth of an automotive motor casing with the publication number CN202361933U, the device mainly consists of a base, a gauge fixing seat, a probe extension rod and a gauge to form a measuring mechanism. A measuring reference seat is arranged on the upper end surface of the gauge fixing seat, and a depth calibration part corresponding to the depth of the measured casing is configured on the upper end surface of the measuring reference seat. During operation, the top end of the measuring extension is adjusted to contact the reference surface of the depth calibration part, and then the gauge pointer is adjusted to the zero position. The depth calibration part is removed, and the motor casing product to be measured is placed on the position where the depth calibration part is located. The probe extension rod is adjusted so that its upper vertex contacts the bottom surface of the casing, and the value indicated by the gauge pointer is read to easily calculate the depth of the measured motor casing. The device has a simple structure, high and reliable measurement accuracy, but when the probe extension rod slides up and down in the gauge fixing seat, in order to reduce the left and right yaw error of the probe extension rod, usually the probe extension rod needs to be produced in a matching manner with the gauge fixing seat, and the inner diameter accuracy requirement of the gauge fixing seat is high, and the manufacturing cost of parts with high inner diameter accuracy is large, which is not suitable for mass production and use, and the maintenance cost is high; secondly, the probe extension rod is in direct contact with the contact point of the dial indicator head. If it encounters accidental collision or excessive pressing of the probe extension rod, the dial indicator may be damaged. Content of the Utility Model

[0004] The utility model provides a simple tooling for high-precision depth measurement, which solves the problem that in the existing device, when the probe extension rod slides up and down in the dial gauge fixing seat, in order to reduce the left-right yaw error of the probe extension rod, the probe extension rod usually needs to be produced in matching with the dial gauge fixing seat, and the inner diameter accuracy requirement of the dial gauge fixing seat is high. However, the manufacturing cost of parts with high inner diameter accuracy is large, which is not suitable for mass production and use, and the maintenance cost is high.

[0005] Secondly, it solves the problem that in the existing device, the probe extension rod is in direct contact with the contact point of the dial indicator head. If the probe extension rod encounters accidental collision or excessive pressing, it may cause damage to the dial indicator.

[0006] According to the above, the utility model aims to provide a simple tooling for high-precision depth measurement with low cost, high precision, mass production and use, and long service life.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A simple tooling for high-precision depth measurement includes a mounting block, which is of a cylindrical structure. A stop block hole and a dial head rod hole are provided on the axis, located at both ends of the mounting block and internally connected. A detection rod is accommodated in the mounting block. The detection rod is rod-shaped, and its rod body matches the dial head rod hole. A ring-shaped stop block is integrally formed on the outer periphery of the rod body. The stop block matches the stop block hole. A linear shaft seat is also provided in the stop block hole and sleeved on the outer periphery of the detection rod. A wire spring is provided at the bottom of the stop block hole.

[0009] Preferably, one side end of the stop block close to the detection rod is accommodated in the dial head rod hole, and the stop block is accommodated in the stop block hole. One end of the wire spring is fixed on the connecting surface of the stop block hole and the dial head rod hole. The detection rod can slide up and down along the axis of the mounting block.

[0010] Preferably, it further includes a dial indicator, which is arranged below the mounting block close to the dial head rod hole. A dial head rod is provided on one side of the dial indicator. The diameter of the dial head rod matches the dial head rod hole and is accommodated in the dial head rod hole. In the dial head rod hole, the dial head rod contacts with one end of the detection rod.

[0011] Preferably, the end face of the mounting block close to the stop block hole extends outward in a cylindrical shape. The diameter of this end face is larger than the diameter of the mounting block. A plurality of through holes are evenly distributed in a circle on this end face. This end face is fixed to the connecting plate by threading the through holes.

[0012] Preferably, the connecting plate is of a circular plate structure. A plurality of equally spaced support screw holes are provided on the outer side of the surface of the connecting plate. Each support screw hole corresponds to a support. The support is threadedly connected to the connecting plate, and both the support and the mounting block are located on the same side of the connecting plate.

[0013] Preferably, a plurality of connecting screw holes are provided in the middle of the surface of the connecting plate, and the connecting plate and the positioning plate are threadedly connected by the connecting screw holes. A plurality of pin holes equidistantly distributed around the circumference are provided on the positioning plate, and each of the pin holes corresponds to a positioning pin, and the positioning pin is installed in the corresponding pin hole.

[0014] Preferably, the positioning plate, the connecting plate and the mounting block are coaxially arranged, and the detection rod passes through the axes of the positioning plate, the connecting plate and the mounting block.

[0015] Preferably, a protective cover is provided on the surface of the positioning plate, and the protective cover is provided on the outer periphery of the detection rod.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The main structure of the utility model is a mounting block, a connecting plate, a positioning plate, and a bracket, all of which are fixed with bolts, which are convenient for disassembly and assembly. The manufacturing precision requirement is not high and can be mass-produced and used. The wire spring and linear bearing are installed in the mounting block, which can improve the measurement accuracy compared with the traditional device: the linear bearing is set to reduce friction and shaking, and improve accuracy. Ensure consistency and repeatability: The wire spring provides a stable rebound force to ensure that the detection rod is quickly and accurately reset. Optimize the center of gravity of the structure: The layout of the bracket and the mounting block is optimized to improve the stability of the device. Improve measurement accuracy: The positioning plate pin hole and the positioning pin position different workpieces to improve accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic cross-sectional view of the overall structure of an embodiment of the utility model.

[0019] Figure 2 The figure is a schematic top view of the overall structure of an embodiment of the utility model.

[0020] In the figure: protective cover 1, positioning plate 2, pin hole 2.1, connecting screw hole 2.2, positioning pin 3, connecting plate 4, bracket screw hole 4.1, linear bearing 5, detection rod 6, stopper 6.1, bracket 7, wire spring 8, mounting block 9, stopper hole 9.1, gauge rod hole 9.2, dial indicator 10, gauge rod 10.1. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In a device dedicated to measuring the depth of an automotive motor housing in the prior art, the device mainly consists of a base, a gauge fixing seat, a probe extension rod, and a measuring mechanism composed of a gauge. A measuring reference seat is provided on the upper end face of the gauge fixing seat, and a depth calibration part corresponding to the depth of the housing to be measured is configured on the upper end face of the measuring reference seat. During operation, the top of the measuring extension is adjusted to contact the reference surface of the depth calibration part, and then the gauge pointer is adjusted to its zero position. After removing the depth calibration part, the motor housing product to be measured is placed on the position where the depth calibration part was located, and the probe extension rod is adjusted so that its upper vertex contacts the bottom surface of the housing. By reading the value indicated by the gauge pointer, it is easy to calculate the depth of the motor housing to be measured. The device has a simple structure, high measurement accuracy, and reliability. However, when the probe extension rod slides up and down in the gauge fixing seat, in order to reduce the left-right yaw error of the probe extension rod, usually the probe extension rod needs to be produced in a matching manner with the gauge fixing seat, and the inner diameter accuracy requirement of the gauge fixing seat is high. Parts with high inner diameter accuracy have high manufacturing costs, are not suitable for mass production, and have high maintenance costs. Secondly, the probe extension rod is in direct contact with the contact point of the dial indicator head. If it encounters accidental collision or excessive pressing of the probe extension rod, it may cause damage to the dial indicator. To solve the above problems, this embodiment is provided.

[0023] Referring to Figures 1 to 2 , Figure 1 is a schematic cross-sectional view of the overall structure of this embodiment, Figure 2 is a schematic top view of the overall structure of this embodiment. This embodiment is a simple tool for measuring depth with high precision. It consists of several key components to ensure its functionality and accuracy. First of all, the tool contains an installation block, which adopts a cylindrical structural design. Its main feature is that a stop block hole and a dial head rod hole are accurately machined on the axis. These two holes are located at both ends of the installation block respectively, and they are interconnected inside the installation block to form a straight channel.

[0024] Inside the installation block, a detection rod is accommodated. This detection rod has a rod-shaped outer shape, and the size of its rod body perfectly matches the inner diameter of the dial head rod hole, ensuring that the detection rod can slide smoothly in the hole without unnecessary gaps. In addition, the outer peripheral part of the rod body of the detection rod is designed as an integrally formed annular structure, and this annular structure serves as the stop block. The shape and size of the stop block match the stop block hole, ensuring that the stop block can be firmly positioned in the hole while allowing the detection rod to move precisely in the stop block hole.

[0025] To further improve the stability and measurement accuracy of the tooling, a linear bearing is provided inside the block hole. The linear bearing has a low friction coefficient and higher load-bearing capacity. It is sleeved on the outer periphery of the detection rod, which can significantly reduce the friction and sway of the detection rod during movement, thereby improving the measurement accuracy. At the bottom of the block hole, a wire spring is also provided. The function of this spring is to provide a stable return force for the detection rod to ensure that during the measurement process, the detection rod can quickly and accurately return to the initial position, thus ensuring the consistency and repeatability of each measurement.

[0026] In addition to the ingenious cooperation of the block and the block hole, and the wire spring described above, the tooling also incorporates a set of precise reset systems aimed at improving the measurement efficiency and accuracy.

[0027] Specifically, at one end of the detection rod close to the head rod hole, a tiny trigger device is designed, which is closely connected to the sensor inside the head. When the detection rod is fully inserted into the object to be measured and reaches the predetermined depth, the trigger device will be slightly pressed by the surface of the object to be measured, thereby activating the sensor and recording the current depth reading. At this time, if it is necessary to withdraw the detection rod from the object to be measured, just gently pull the head part outwards. The trigger device will first unlock the connection with the block, allowing the detection rod to automatically reset to the initial position under the elastic force of the wire spring without manual adjustment, greatly saving time.

[0028] In addition, to further enhance the measurement stability and safety, the tooling also adopts a double locking mechanism. The first locking is that after the detection rod is fully inserted and triggers the reading, the block and the block hole are tightly locked through the internal mechanical structure to prevent the detection rod from accidentally moving due to external force, affecting the measurement accuracy. The second locking is the locking knob on the head part. After the user confirms that the reading is correct, the locking knob can be rotated to further strengthen the connection between the detection rod and the mounting block to ensure that the measurement result is not affected during handling or movement.

[0029] It is worth mentioning that the tooling in this embodiment fully considers the user experience and portability during the design. The surface of the mounting block is treated with anti-slip texture to ensure a firm grip even in wet or oily environments. At the same time, the head part adopts a high-definition display screen, which can clearly display the reading even in a dim environment. The overall structure is compact, lightweight, and easy to carry to various measurement sites, and can be used as the main tool in routine inspections.

[0030] In this embodiment, the stopper is arranged at one end close to the detection rod. Specifically, the end is designed to be adapted and embedded in the hole of the meter head rod. Such a design ensures that the stopper and the meter head rod hole can be closely matched, thereby providing stable support and positioning. The stopper itself is designed to be accommodated in a stopper hole specially designed for it, and this hole is also located at the corresponding position of the detection rod.

[0031] In order to ensure the flexibility and stability of the detection rod during use, a wire spring is arranged in the block hole, and one end of the wire spring is fixed on the connecting surface between the block hole and the header rod hole. This fixing method not only ensures the stability of the spring, but also ensures that the spring can effectively exert its elastic force during work. The other end of the wire spring is an open end, and the detection rod passes through the wire spring and enters the header rod hole. The block matches the wire spring, and the block fits the wire spring. In this way, when the detection rod needs to slide up and down along the axis of the mounting block, the spring acts on the block, thereby making the detection rod have elastic force. The elastic force of the detection rod can avoid the reaction force from being concentrated on the header rod of the dial indicator, thereby reducing the spring wear of the dial indicator and extending the service life of the dial indicator.

[0032] In an embodiment of the present invention, a precision measuring tool, a dial indicator, is also included. The dial indicator is arranged in the lower area of ​​the mounting block, specifically below the header rod hole. In order to ensure the accuracy and stability of the measurement, a header rod is specially designed on one side of the dial indicator. The header rod is connected to the dial indicator by an elastic connection method, which can be a spring, a rubber pad or other structure that can provide appropriate elasticity to ensure that the header rod can flexibly respond to slight changes in the object being measured during the measurement process.

[0033] The diameter of the meter rod is designed to match the size of the meter rod hole, which ensures that the meter rod can be smoothly accommodated in the meter rod hole. Inside the meter rod hole, one end of the meter rod is in close contact with one end of the detection rod. This contact is direct, without an intermediate medium, to reduce measurement errors. The other end of the detection rod is connected to the object to be measured. When the object to be measured is displaced or deformed, this change will be transmitted to the meter rod through the detection rod, which will in turn affect the reading of the dial indicator, thereby achieving accurate measurement of the state of the object to be measured.

[0034] At the other end of the detection rod, an adjustable fixture is designed to ensure that the detection rod remains stable during measurement. The fixture includes a threaded adjustment screw, one end of which is connected to the other end of the detection rod and the other end is fixed to the mounting block through a locking nut. By rotating the adjustment screw, the position of the detection rod can be easily adjusted to meet the measurement needs of workpieces of different sizes.

[0035] To further improve the measurement accuracy, the reading window of the dial indicator is designed to be clearer and easier to read. The window is designed with a magnifying glass, enabling the operator to read the measurement value more accurately. In addition, a fine-tuning knob is provided on the dial of the dial indicator, allowing the operator to make fine adjustments during the measurement process to ensure the accuracy of the measurement results.

[0036] The housing of the entire measuring device is made of high-strength materials to ensure stable performance even in harsh working environments. The surface of the housing has been specially treated, having good corrosion resistance and wear resistance, which extends the service life of the device. At the same time, the housing is designed in a simple and generous manner, facilitating the operator to hold and use.

[0037] The end face of the mounting block near the stopper hole extends peripherally in a cylindrical shape. The diameter of this end face is larger than the diameter of the mounting block. A number of through holes are provided on this end face, evenly distributed in a circumferential manner. This end face is threadedly fixed to the connecting plate through the through holes and is used to fix to the connecting plate. The larger end face enables a larger fitting area and a larger force-bearing area between the mounting block and the connecting plate, resulting in better fixing stability.

[0038] In addition, to ensure the stability and durability of the mounting block under various working conditions, its material is selected as a high-strength and corrosion-resistant alloy steel. This material not only has good mechanical properties but also can withstand long-term use in harsh environments. During the manufacturing process, the mounting block is also subjected to fine heat treatment to further improve its hardness and toughness.

[0039] Refer to Figure 2 , the connecting plate described in the figure is a circular plate-like structure, which gives the connecting plate good symmetry and uniformity in space. A number of support screw holes are provided on the outer edge of the surface of the connecting plate, and these screw holes are evenly distributed in the edge area of the connecting plate, ensuring the stability of the structure and the uniformity of the load-bearing. Each support screw hole corresponds to a specific support. These supports are tightly combined with the connecting plate by means of threaded connection. The supports are rod-shaped and are used as the support legs of this embodiment to facilitate the placement of the device of this embodiment. The lengths and shapes of the supports are the same, and the length of the support is greater than the diameter of the dial indicator, avoiding the dial indicator directly contacting the ground when placing the device of this embodiment, which may cause the dial indicator to be knocked and result in errors in accuracy and affect the reading.

[0040] Specifically, each support is matched with the screw hole on the connecting plate through the internal thread therein, and the support is fixed to the connecting plate by tightening screws or bolts. This connection method not only ensures the firmness of the connection but also facilitates later disassembly and maintenance. In addition, all the supports and the mounting blocks are arranged on the same side of the connecting plate. Such a layout optimizes the center of gravity of the overall structure, making the entire device more stable during use and also facilitating installation and operation.

[0041] In the middle of the surface of the connecting plate, there are several threaded holes for connection. The purpose of these connecting screw holes is to tightly connect the connecting plate and the positioning plate together through threads. This connection method not only ensures the stability between the two plates, but also facilitates later disassembly and maintenance.

[0042] A series of pin holes are evenly distributed on the positioning plate. These pin holes are arranged according to the principle of equidistant circumference, ensuring that the position of each pin hole is accurate. Each pin hole corresponds to a specially designed positioning pin, which is accurately installed in the respective pin hole. The positioning pins include positioning pins of various sizes and pin head shapes. By installing these positioning pins, workpieces of different sizes and shapes to be measured can be positioned, thereby improving the measurement accuracy of the device of this embodiment.

[0043] In this embodiment, the positioning plate, the connecting plate and the mounting block are designed as a coaxial structure, which means that their central axes are completely aligned. This design ensures the precise positional relationship of the various components in space, thereby providing a basis for the stability and accuracy of the entire device. Specifically, the positioning plate serves as the reference part of the device, which is responsible for determining the initial position and direction of the device. The connecting plate plays the role of connecting the various components. It tightly combines the positioning plate and the mounting block to ensure that they do not move relative to each other during operation. The mounting block is the supporting part of the entire device, which is fixed in the appropriate position of the equipment to ensure the stability and reliability of the device.

[0044] A protective cover is also provided on the surface of the positioning plate, and the protective cover is provided on the outer periphery of the detection rod. The protective cover covers the exposed part of the detection rod. Since the exposed part of the detection rod is the part used for detection, it is necessary to go deep into the part for measurement. However, since each part is different, if the center of gravity of the detection rod is shifted due to accidental bumping during use, it may cause local excessive wear or even damage when the detection rod is raised or lowered, thereby affecting the measurement accuracy. Therefore, a protective cover is required, and the material of the protective cover is selected from lightweight elastic material.

[0045] The beneficial effects of this embodiment are:

[0046] Improve measurement accuracy: By setting a linear bearing inside the block hole, the friction and shaking of the detection rod during movement are significantly reduced, thereby improving the measurement accuracy.

[0047] Ensure measurement consistency and repeatability: The wire spring set at the bottom of the block hole provides a stable rebound force for the detection rod, ensuring that the detection rod can quickly and accurately return to its initial position.

[0048] Improve measurement efficiency and accuracy: The built-in precision reset system, including the trigger device and sensor, can quickly record the depth reading and allow the detection rod to be quickly withdrawn from the object being measured.

[0049] Optimize the structural center of gravity and improve the stability of the device: The layout of the bracket and the mounting block is optimized, making the whole device more stable during use and facilitating installation and operation.

[0050] Improve the measurement accuracy: The use of uniformly distributed pin holes and positioning pins on the positioning plate can position workpieces to be measured with different sizes and shapes, improving the measurement accuracy.

[0051] In summary, through a series of technical improvements, the device of this embodiment realizes high-precision, fast, stable and convenient depth measurement. Moreover, it has a simple structure, is assembled by threaded connection, has a low cost, is suitable for mass production and use, is applicable to the field of micro-motor housing stamping manufacturing technology, and is especially suitable for the production and manufacturing of motors in the new energy industry.

[0052] Except for the above embodiments, within the scope disclosed in the claims and the specification of the present utility model, the technical features or technical data of the present utility model can be reselected and combined to form new embodiments, which should also be regarded as specific embodiments of the present utility model and within the protection scope of the present utility model.

Claims

1. A simple tool for high-precision depth measurement, characterized in that: It includes a mounting block, which is a columnar structure, and a block hole and a meter rod hole are provided on the axis, which are respectively located at both ends of the mounting block and are internally connected. The mounting block accommodates a detection rod, which is rod-shaped, and the rod body matches the meter rod hole, and an annular block is integrally formed on the outer periphery of the rod body, and the block matches the block hole. A linear bearing sleeve is also provided in the block hole and is arranged on the outer periphery of the detection rod, and a wire spring is provided at the bottom of the block hole.

2. The simple tool for high-precision depth measurement according to claim 1, characterized in that: The stopper is close to one end of the detection rod, which is accommodated in the hole of the header rod. The stopper is accommodated in the stopper hole. One end of the wire spring is fixed on the connecting surface between the stopper hole and the header rod hole. The detection rod can slide up and down along the axis of the mounting block.

3. The simple tool for high-precision depth measurement according to claim 1, characterized in that: It also includes a dial indicator, which is arranged below the mounting block near the header rod hole. A header rod is provided on one side of the dial indicator. The header rod has a diameter that matches the header rod hole and is accommodated in the header rod hole. The header rod is in contact with one end of the detection rod in the header rod hole.

4. The simple tool for high-precision depth measurement according to claim 1, characterized in that: The end surface of the mounting block close to the stopper hole extends outwardly in a cylindrical shape, the diameter of the end surface is larger than the diameter of the mounting block, and a plurality of through holes equidistantly distributed around the circumference are arranged on the end surface, and the end surface is fixed to the connecting plate by threads through the through holes.

5. The simple tool for high-precision depth measurement according to claim 4, characterized in that: The connecting plate is a circular plate structure, and a plurality of equally spaced bracket screw holes are provided on the outer surface of the connecting plate. Each bracket screw hole corresponds to a bracket. The bracket and the connecting plate are threadedly connected, and the bracket and the mounting block are located on the same side of the connecting plate.

6. The simple tool for high-precision depth measurement according to claim 5, characterized in that: A plurality of connecting screw holes are provided in the middle of the surface of the connecting plate, and the connecting plate and the positioning plate are threadedly connected by the connecting screw holes. The positioning plate is provided with a plurality of pin holes equidistantly distributed around the circumference, and each of the pin holes corresponds to a positioning pin, and the positioning pin is installed in the corresponding pin hole.

7. The simple tool for high-precision depth measurement according to claim 6, characterized in that: The positioning plate, the connecting plate and the mounting block are all coaxially arranged, and the detection rod passes through the axes of the positioning plate, the connecting plate and the mounting block.

8. The simple tool for high-precision depth measurement according to claim 6 or 7, characterized in that: A protective cover is also provided on the surface of the positioning plate, and the protective cover is provided on the outer periphery of the detection rod.

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