Hole bottom grinding and polishing device for slender stepped hole

Abstract

The utility model provides a slender stepped hole bottom grinding and polishing device which comprises a guide sleeve, a rotary connecting rod is arranged in the guide sleeve, a grinding head is fixedly arranged at one end of the connecting rod, and the other end of the connecting rod is fixedly connected with a chuck of an electric drill. A positioning ring is fixedly arranged at one end of the guide sleeve, a rotating bearing is arranged at the other end of the guide sleeve, and the connecting rod abuts against the positioning ring and the rotating bearing to rotate so that the connecting rod and the guide sleeve can be coaxially arranged. A gap is formed between the connecting rod and the guide sleeve, and the end of the guide sleeve is connected with a negative pressure air extractor used for adsorbing impurities at the grinding head. According to the hole bottom grinding and polishing device for the slender stepped hole, the problem of fine grinding in a narrow space is solved, the adaptability, stability and environmental protection performance of equipment are improved through a series of innovative designs, and an efficient, safe and easy-to-operate solution is provided for a user.

Description

Technical Field

[0001] This utility model relates to the field of grinding and polishing, specifically to a grinding and polishing device for the bottom of a slender stepped hole. Background Technology

[0002] The existing shaping and polishing tools on the market have limited size specifications. The length of the grinding rod, the diameter of the grinding head, and the grinding surface are all different, which cannot meet the requirements of shaping and polishing the bottom of narrow stepped holes. Moreover, the existing tools are very easy to damage the hole wall when grinding the bottom of the hole, resulting in quality problems.

[0003] Existing technology has shortcomings: the diameter of grinding heads on the market is generally divided into integer 1mm increments, lacking specificity. The length of grinding heads on the market is also limited to a few fixed specifications; for the bottom of slender holes with a length-to-diameter ratio of 10:1 or higher, there are no readily available grinding heads to choose from. In addition to grinding the bottom surface, grinding heads also grind the sides; however, due to the instability of the handheld tool during grinding, some damage to the hole wall is inevitable. Utility Model Content

[0004] The main objective of this invention is to provide a device for grinding and polishing the bottom of a slender stepped hole, thereby solving the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: it includes a guide sleeve, a rotating connecting rod is provided inside the guide sleeve, a grinding head is fixedly provided at one end of the connecting rod, and the other end is fixedly connected to the chuck of the electric drill;

[0006] A positioning ring is fixed at one end of the guide sleeve, and a rotating bearing is provided at the other end. The connecting rod rotates against the positioning ring and the rotating bearing so that the connecting rod and the guide sleeve are arranged coaxially.

[0007] A gap is provided between the connecting rod and the guide sleeve, and a negative pressure suction device is connected to the end of the guide sleeve to adsorb impurities at the grinding head.

[0008] Preferably, the guide sleeve includes positioning cylinders and tee heads at both ends, and multiple extension cylinders are provided between the positioning cylinders and the tee heads.

[0009] Preferably, the tee includes a bearing housing and an air extraction port, and the bearing housing is coaxially arranged with the extension tube and the positioning tube;

[0010] The rotating bearing is housed within the bearing housing;

[0011] The negative pressure air extraction device is connected to the air extraction port through an air pipe.

[0012] Preferably, the connecting rod includes a drive head and a connector at both ends, and a plurality of extension rods are fixed between the drive head and the connector;

[0013] The drive head is fixedly connected to the chuck of the electric drill;

[0014] The connector is fixedly connected to the grinding head.

[0015] Preferably, the positioning ring includes an inner ring and an outer ring, the inner ring and the outer ring are connected by multiple connecting rods, the outer ring is fixedly connected to the guide sleeve, and the inner ring is sleeved on the connecting rod.

[0016] This utility model provides a device for grinding and polishing the bottom of slender stepped holes, with the following advantages:

[0017] 1. By using an extended cylinder and extended rod, the length of this device can be adjusted according to actual needs to accommodate grinding requirements for holes of different depths. This flexibility allows one tool to handle multiple work scenarios, improving the versatility and economic efficiency of the equipment.

[0018] 2. The guide sleeve, connecting rod, and their internal components such as the positioning ring and rotating bearing are all coaxially designed, ensuring good concentricity even after extension, avoiding uneven grinding caused by eccentricity, and guaranteeing grinding accuracy. The inner and outer rings are connected by a connecting rod. The outer ring is fixed to the guide sleeve, and the inner ring is fitted onto the connecting rod, which not only provides stable support but also allows negative pressure to adsorb impurities, thereby improving stability during the grinding process.

[0019] 3. Through the gap between the inner and outer rings of the positioning ring, the air extraction port at the end of the guide sleeve, and the air extraction port on the tee head, the negative pressure air extraction device can effectively extract burrs and dust generated during the grinding process, preventing them from re-adhering to the hole wall or grinding surface. This not only improves the grinding quality but also protects the working environment and reduces dust pollution.

[0020] 4. Due to its modular design, users can easily assemble or disassemble the corresponding components according to specific work requirements, simplifying the preparation process and improving work efficiency. The automated negative pressure dust collection system reduces the need for manual cleaning, lowers the risk of operators coming into contact with hazardous substances, and increases operational safety.

[0021] 5. By optimizing the design of each component, we ensure that the grinding head can perform efficient grinding and polishing at the bottom of the hole, reducing work interruptions caused by equipment failure or instability, thereby improving overall work efficiency. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 This is a front sectional view of the overall structure of this utility model;

[0024] Figure 2This is a front sectional view of the guide sleeve structure of this utility model;

[0025] Figure 3 This is a front sectional view of the connecting rod structure of this utility model;

[0026] Figure 4 This is a utility model Figure 1 Sectional view of AA;

[0027] Figure 5 This is a schematic diagram of the installation and use of this utility model;

[0028] In the diagram: guide sleeve 1; extension sleeve 101; positioning sleeve 102; tee head 103; connecting rod 2; extension rod 201; drive head 202; connector head 203; positioning ring 3; grinding head 4; air extraction port 5; bearing seat 6; rotating bearing 7. Detailed Implementation

[0029] like Figures 1-5 As shown, a device for grinding and polishing the bottom of a slender stepped hole includes a guide sleeve 1, a rotating connecting rod 2 inside the guide sleeve 1, a grinding head 4 fixedly mounted on one end of the connecting rod 2, and the other end fixedly connected to the chuck of an electric drill.

[0030] One end of the guide sleeve 1 is fixed with a positioning ring 3, and the other end is provided with a rotating bearing 7. The connecting rod 2 rotates against the positioning ring 3 and the rotating bearing 7 so that the connecting rod 2 and the guide sleeve 1 are arranged coaxially.

[0031] A gap is provided between the connecting rod 2 and the guide sleeve 1. The end of the guide sleeve 1 is connected to a negative pressure suction device to adsorb impurities from the grinding head 4.

[0032] The guide sleeve 1 rests against the inner wall of the hole, and the connecting rod 2 is driven to rotate by an electric drill, so that the grinding head 4 rests against the bottom of the hole for grinding and polishing. The positioning ring 3 and the rotating bearing 7 can ensure that the connecting rod 2 is positioned and rotates more smoothly. The burrs removed by grinding are discharged through the negative pressure air extraction device to avoid damaging the hole wall and to clean it in time.

[0033] The guide sleeve 1 serves as the outer shell of the entire device, providing a stable structural framework for the internal components and ensuring the overall stability of the device through contact with the inner wall of the hole. The connecting rod 2 is located inside the guide sleeve, with a grinding head 4 fixed at one end and connected to an electric drill at the other end. When the electric drill is working, it drives the connecting rod to rotate, thereby driving the grinding head to grind and polish the bottom of the hole.

[0034] The positioning ring 3 is fixed to one end of the guide sleeve to limit the position of the connecting rod, ensure its coaxiality of rotation, prevent deviation from the center line, and thus improve grinding accuracy. The rotating bearing 7 is located at the other end of the guide sleeve, supporting the connecting rod while allowing it to rotate freely, reducing friction and making the operation smoother.

[0035] The gap and negative pressure suction device are designed to prevent debris generated during the grinding process from affecting the quality of the hole wall. A gap is specially left between the connecting rod and the guide sleeve, and a negative pressure suction device is connected to the end of the guide sleeve to promptly absorb and remove impurities from the grinding process.

[0036] Preferably, the guide sleeve 1 includes positioning cylinders 102 and tee heads 103 at both ends, and multiple extension cylinders 101 are provided between the positioning cylinders 102 and the tee heads 103.

[0037] The extension tube 101 of corresponding length is spliced ​​according to the hole depth to adapt to grinding and polishing operations with different hole depths.

[0038] The three-way connector 103 includes a bearing seat 6 and an air extraction port 5. The bearing seat 6 is coaxially arranged with the extension tube 101 and the positioning tube 102.

[0039] The rotating bearing 7 is located inside the bearing housing 6;

[0040] The negative pressure air extraction device is connected to the air extraction port 5 through an air pipe.

[0041] The positioning cylinder 102 is located at one end of the guide sleeve and serves to fix and position the device, ensuring that the entire device can stably abut against the inner wall of the hole during use.

[0042] The tee connector 103 is located at the other end of the guide sleeve and integrates the bearing housing 6 and the air extraction port 5. The bearing housing provides a mounting position for the rotating bearing 7, ensuring the smooth rotation of the connecting rod 2; while the air extraction port allows a negative pressure air extraction device to be connected here through an air pipe to remove debris or dust generated during the grinding process.

[0043] Multiple extension cylinders 101 can be spliced ​​together as needed to adjust the overall length of the guide sleeve, making it suitable for grinding and polishing holes of different depths. This flexibility greatly increases the tool's application range, and each extension cylinder is coaxially set with the positioning cylinder and tee head, ensuring the consistency and stability of the overall structure.

[0044] Preferably, the connecting rod 2 includes a driving head 202 and a connecting head 203 at both ends, and a plurality of extension rods 201 are fixed between the driving head 202 and the connecting head 203;

[0045] The drive head 202 is fixedly connected to the chuck of the electric drill;

[0046] The connector 203 is fixedly connected to the grinding head 4.

[0047] The drive head 202 is one end of the connecting rod, used for fixed connection with the drill chuck. It is responsible for transmitting the power of the drill to the entire connecting rod, thereby driving the grinding head to rotate.

[0048] The extension rod 201 is located between the drive head and the connector head. The number of extension rods can be added or removed as needed to adjust the overall length of the connecting rod. Each extension rod is securely connected to both the drive head and the connector head, ensuring that the extended length does not affect the stability or concentricity of rotation. This design allows for flexible handling of grinding tasks with holes of varying depths, increasing the applicability of the device.

[0049] The connector 203 is located at the other end of the connecting rod and is used for fixed connection with the grinding head 4. It not only transmits the rotational force from the drive head to the grinding head, but also ensures the stability and accuracy of the grinding head during operation.

[0050] Preferably, the positioning ring 3 includes an inner ring and an outer ring, the inner ring and the outer ring are connected by multiple connecting rods, the outer ring is fixedly connected to the guide sleeve 1, and the inner ring is sleeved on the connecting rod 2.

[0051] There is a gap between the inner and outer rings, which allows impurities to be adsorbed by negative pressure and enter the guide sleeve 1 for discharge.

[0052] The inner ring fits directly onto the connecting rod 2, ensuring the rod can rotate freely without shifting. Its tight fit with the connecting rod is crucial for precise grinding. The outer ring is fixedly connected to the guide sleeve 1, providing stable support for the entire positioning ring. The outer ring's design ensures the positioning ring's stability within the entire device, thus supporting the normal operation of internal components. Multiple connecting rods connect the inner and outer rings, maintaining structural stability between them. These connecting rods are evenly distributed to ensure a fixed gap between the inner and outer rings. This design allows the negative pressure suction device to effectively absorb and remove impurities generated during grinding through this gap.

[0053] Working principle: When the electric drill drives the connecting rod 2 to rotate, the grinding head 4 grinds and polishes the bottom of the hole. Simultaneously, the negative pressure suction device generates suction through the suction port 5 at the end of the guide sleeve. Due to the gap between the inner and outer rings of the positioning ring 3, impurities generated during grinding can be drawn into the guide sleeve through this gap and ultimately discharged by the negative pressure suction device. This design not only improves grinding efficiency and quality but also effectively prevents impurities from re-adhering to the hole wall or the ground surface, further enhancing the safety and cleanliness of the operation.

[0054] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A device for grinding and polishing the bottom of a slender stepped hole, characterized in that: Includes a guide sleeve (1), inside which is a rotating connecting rod (2), one end of which is fixedly fitted with a grinding head (4), and the other end is fixedly connected to the chuck of an electric drill; One end of the guide sleeve (1) is fixed with a positioning ring (3), and the other end is provided with a rotating bearing (7). The connecting rod (2) rotates against the positioning ring (3) and the rotating bearing (7) so that the connecting rod (2) and the guide sleeve (1) are arranged coaxially. A gap is provided between the connecting rod (2) and the guide sleeve (1). The end of the guide sleeve (1) is connected to a negative pressure suction device for adsorbing impurities at the grinding head (4).

2. The device for grinding and polishing the bottom of a slender stepped hole according to claim 1, characterized in that: The guide sleeve (1) includes positioning cylinders (102) at both ends and a tee head (103), and multiple extension cylinders (101) are provided between the positioning cylinders (102) and the tee head (103).

3. The device for grinding and polishing the bottom of a slender stepped hole according to claim 2, characterized in that: a three-way connector is used. The head (103) includes a bearing housing (6) and an air extraction port (5), and the bearing housing (6) is coaxially arranged with the extension cylinder (101) and the positioning cylinder (102); The rotating bearing (7) is located inside the bearing housing (6); The negative pressure air extraction device is connected to the air extraction port (5) through an air pipe.

4. The device for grinding and polishing the bottom of a slender stepped hole according to claim 1, characterized in that: The connecting rod (2) includes a drive head (202) and a connector (203) at both ends, and a plurality of extension rods (201) are fixed between the drive head (202) and the connector (203). The drive head (202) is fixedly connected to the chuck of the electric drill; The connector (203) is fixedly connected to the grinding head (4).

5. The device for grinding and polishing the bottom of a slender stepped hole according to claim 1, characterized in that: The positioning ring (3) includes an inner ring and an outer ring. The inner ring and the outer ring are connected by multiple connecting rods. The outer ring is fixedly connected to the guide sleeve (1). The inner ring is sleeved on the connecting rod (2).

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