Engineering driller clutch structure

Abstract

The utility model provides an engineering driller clutch structure and relates to the technical field of clutches. Comprising a gearbox and a drill spindle arranged in the gearbox, and the drill spindle is rotatably installed in the gearbox through a bearing; the belleville spring deforms through tightening of the self-locking nut, elastic force is formed, and under the action of the friction pressing plate and the copper friction plate, the gear drives the drilling shaft to rotate under transmission of the gearbox due to friction force, and drilling operation is conducted. When an overload phenomenon occurs and the rotating torque is greater than the friction torque, the gear and the drill shaft rotate relatively, overload kinetic energy is released, the motor is protected, and the motor is prevented from being damaged due to overload.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of clutch, especially relates to an engineering drilling machine clutch structure. BACKGROUND

[0002] The main function of the drilling machine clutch is to connect or disconnect the power source, such as the connection between the engine and the transmission system.

[0003] Then the existing technology has a reinforced concrete drilling machine in the drilling process, the drill bit touches the reinforced concrete inside the steel bar, the drill bit contacts the steel bar, resulting in a stuck drill, overload phenomenon, thereby causing the stator or rotor of the motor to burn out.

[0004] Therefore, the utility model provides an engineering drilling machine clutch structure. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the shortcomings in the prior art and provides an engineering drilling machine clutch structure.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an engineering drilling machine clutch structure, including gearbox and the drill shaft placed in the inside of gearbox, the drill shaft is rotatably installed in the inside of gearbox through bearing;

[0007] The shaft body of the drill shaft is provided with a gear, the two sides of the gear are provided with copper friction plates along the shaft body of the rotating shaft, and the outer sides of the two copper friction plates are provided with friction pressure plates along the shaft body of the rotating shaft, wherein one friction pressure plate is provided with a pre-tightening force adjustable disc spring between the bearing;

[0008] The end of the drill shaft is provided with an external thread section, and a self-locking nut is installed on the external thread section.

[0009] As a preferred embodiment, the drill shaft and the shaft hole of the gearbox are sleeved with a skeleton oil seal and a hole retainer, the skeleton oil seal is used for preventing the lubricating oil in the gearbox from leaking, the hole retainer is located between the skeleton oil seal and the bearing, and the sealing property is improved to prevent external impurities from entering the inside of the gearbox.

[0010] As a preferred embodiment, the skeleton oil seal, the hole retainer, the bearing, the disc spring, the friction pressure plate, the copper friction plate and the gear are sleeved on the shaft body of the drill shaft and placed in the inside of the gearbox.

[0011] Compared with the prior art, the utility model has the advantages and positive effects that,

[0012] Tightening the self-locking nut deforms the disc spring, creating elastic force. Under the action of the friction plate and copper friction pads, the gear, driven by friction, rotates the drill shaft to perform drilling operations. When an overload occurs, if the rotational torque exceeds the frictional torque, the gear and drill shaft rotate relative to each other, releasing the overload kinetic energy, protecting the motor, and preventing motor damage from overload. Attached Figure Description

[0013] Figure 1 This utility model provides a structural schematic diagram of an engineering drilling rig clutch structure.

[0014] Legend:

[0015] 1. Drill spindle; 2. Skeleton oil seal; 3. Hole retaining ring; 4. Bearing; 5. Disc spring; 6. Gear; 7. Friction pressure plate; 8. Self-locking nut; 9. Gearbox; 10. Copper friction plate. Detailed Implementation

[0016] 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 protection scope of the present utility model.

[0017] like Figure 1As shown, this embodiment provides a technical solution: a clutch structure for an engineering drilling rig, including a drill shaft 1. The drill shaft 1 is rotatably connected to the inside of a gearbox 9 via a pair of bearings 4. The two bearings 4 are installed back-to-back, and axial backlash is eliminated by pre-tightening. A gear 6 is mounted on the shaft of the drill shaft 1, and the gear 6 is connected to the transmission components of the gearbox 9 (such as the drive components (drive gears) on the motor inside the gearbox 9) to transmit power. Copper friction plates 10 are mounted on both sides of the gear 6, and both copper friction plates 10 are mounted on the shaft of the drill shaft 1. Friction pressure plates 7 are mounted on the sides of both copper friction plates 10, and both friction pressure plates 7 are mounted on the shaft of the drill shaft 1. A disc spring 5 is mounted between one of the friction pressure plates 7 on the shaft of the drill shaft 1 and the bearing 4. There are two or more disc springs 5, which are used to adjust the pre-tightening force on the drill shaft 1. By adjusting the compression degree of the disc springs 5, the pre-tightening force can be adjusted and controlled. The drill shaft 1, located inside the gearbox 9, has an externally threaded section at its end. A self-locking nut 8 is threaded onto this section. A friction plate 7 and a copper friction disc 10, located on the side of the gear 6 away from the bearing 4, are positioned between the self-locking nut 8 and the gear 6. Rotating the self-locking nut 8 adjusts the preload of the disc spring 5 on the drill shaft 1. A skeleton oil seal 2 and a retaining ring 3 are fitted at the shaft hole where the drill shaft 1 mates with the gearbox 9. The retaining ring 3 is located between the skeleton oil seal 2 and the bearing 4, increasing the seal. The skeleton oil seal 2 prevents lubricating oil leakage from inside the gearbox 9, and the retaining ring 3, located between the skeleton oil seal 2 and the bearing 4, increases the seal and prevents external impurities from entering the gearbox 9.

[0018] like Figure 1 As shown, the skeleton oil seal 2, the hole retaining ring 3, the bearing 4, the disc spring 5, the friction pressure plate 7, the copper friction plate 10, and the gear 6 are sleeved on the shaft of the drill shaft 1 and are placed inside the gearbox 9 as a whole.

[0019] Working principle:

[0020] like Figure 1 As shown:

[0021] Under normal operation, when the self-locking nut 8 is tightened, the disc spring 5 deforms, creating an elastic force. Under the action of the friction plate 7 and the copper friction plate 10, the gear 6, due to friction, drives the drill shaft 1 to rotate, thus performing drilling operations. When an overload occurs, if the rotational torque exceeds the frictional torque, the gear 6 rotates relative to the drill shaft 1 (the gear 6 slips on the drill shaft 1), releasing the overload kinetic energy and protecting the motor.

[0022] 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 other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications 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 protection scope of the technical solution of the present utility model.

Claims

1. A clutch structure for an engineering drilling rig, comprising a gearbox (9) and a drill shaft (1) disposed inside the gearbox (9), characterized in that, The drill shaft (1) is rotatably mounted inside the gearbox (9) via a bearing (4); The drill shaft (1) is provided with a gear (6), and copper friction plates (10) are provided on both sides of the gear (6) along the shaft of the rotating shaft (1). Friction pressure plates (7) are provided on the outer sides of the two copper friction plates (10) along the shaft of the rotating shaft (1). A disc spring (5) with adjustable preload is provided between one of the friction pressure plates (7) and the bearing (4). The end of the drill shaft (1) is provided with an external thread section, and a self-locking nut (8) is installed on the external thread section.

2. The engineering drilling rig clutch structure according to claim 1, characterized in that: The drill shaft (1) and the gearbox (9) are fitted with a skeleton oil seal (2) and a hole retaining ring (3).

3. The engineering drilling rig clutch structure according to claim 2, characterized in that: The skeleton oil seal (2), hole retaining ring (3), bearing (4), disc spring (5), friction pressure plate (7), copper friction plate (10) and gear (6) are sleeved on the shaft of the drill shaft (1) and placed inside the gearbox (9).

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