Auxiliary positioning device for pneumatic rock drill

Abstract

An auxiliary positioning device for a pneumatic rock drill comprises a positioning frame and a positioning barrel arranged at the top of the positioning frame, the inner diameter of the positioning barrel is gradually reduced from one end to the other end, no less than three long-strip-shaped holes are formed in the circumference of the positioning barrel in a surrounding mode, and screw rods are arranged in the long-strip-shaped holes in a sliding mode. And one end of the screw rod penetrates into the positioning cylinder and is connected with a universal ball, and the other end of the screw rod extends out of the positioning cylinder and is screwed with a jacking nut. A plurality of universal balls with opposite ball ends are arranged in the positioning barrel, so that a supporting space for rotation of a drill rod of the pneumatic rock drill is formed in the positioning barrel, the positioning barrel is trumpet-shaped, the universal balls can move along the longitudinal direction of the positioning barrel, and when the universal balls move, the positioning barrel can move along the longitudinal direction of the positioning barrel. As the diameter of the positioning cylinder is gradually reduced or increased along the longitudinal direction, the position of the universal ball can be relatively changed, so that the space size of the positioning space is changed, the positioning device is suitable for the drill rods of the pneumatic rock drill with different specifications and sizes, and the application range of the device is expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of rock mining, in particular to an auxiliary positioning device for a pneumatic rock drill. Background Art

[0002] During rock mining and tunnel excavation, blasting is often used to improve operational efficiency. Pneumatic rock drills are typically used to drill holes, and then explosives are placed in the holes to blast them. During the drilling process, surveying and exploration are typically performed, and then the blasting points are calculated. Finally, workers use handheld pneumatic rock drills to drill holes. To ensure drilling accuracy, workers are required to support the drill rod to prevent excessive vibration, which can cause the drill rod to swing. However, prolonged vibration can cause fatigue among construction workers.

[0003] To support and position drill rods and reduce the workload of construction workers, a Chinese patent with publication number CN208380506U has been developed. This patent discloses a drill rod auxiliary positioning device for pneumatic rock drills, comprising a tubular support portion capable of being threaded with the drill rod and a vertically fixed rod portion connected to the tubular support portion. The tubular support portion includes a support tube body with a mounting notch formed therein. At least three universal ball bearings are circumferentially mounted on the inner wall of the support tube body, on either side of the mounting notch. This patent utilizes at least three universal ball bearings to position and support the drill rod. However, since the positions of the universal ball bearings are fixed, the support space is fixed and cannot be adjusted. In actual use, pneumatic rock drills use drill rods of varying specifications, resulting in a limited range of applications for this auxiliary positioning device. Utility Model Content

[0004] The purpose of the utility model is to provide an auxiliary positioning device for a pneumatic rock drill, which can assist in positioning drill rods of different specifications and sizes and improve the scope of use.

[0005] In order to solve the deficiencies of the above-mentioned technical problems, the utility model adopts the following technical solutions: an auxiliary positioning device for a pneumatic rock drill, comprising a positioning frame and a positioning cylinder arranged on the top of the positioning frame, the inner diameter of the positioning cylinder gradually decreasing from one end to the other end, and a number of not less than three elongated holes are opened around the circumference of the positioning cylinder, the elongated holes are arranged along the longitudinal direction of the positioning cylinder, screws are slidably arranged in the elongated holes, one end of the screw penetrates into the positioning cylinder and is connected to a universal ball, the other end of the screw extends to the outside of the positioning cylinder and is screwed with a top holding nut, and all the ends of the universal balls are relative to each other and form a positioning space for the rock drill rotating rod to pass through.

[0006] As a further optimization of the auxiliary positioning device for a pneumatic rock drill of the utility model, the positioning frame includes a positioning platform, a connector and an adjustable telescopic member arranged between the positioning platform and the connector, and the positioning cylinder is fixed to the upper end surface of the positioning platform.

[0007] As a further optimization of the auxiliary positioning device for a pneumatic rock drill of the utility model, the adjustable telescopic member is a hydraulic rod.

[0008] As a further optimization of the auxiliary positioning device for a pneumatic rock drill of the utility model, the adjustable telescopic member is a bolt-type telescopic rod.

[0009] As a further optimization of the auxiliary positioning device for a pneumatic rock drill of the utility model, the rod body of the screw located in the elongated hole is provided with a friction silicon sleeve.

[0010] As a further optimization of the auxiliary positioning device for a pneumatic rock drill of the utility model, the connector includes a vertical rod portion fixing the lower end surface of the adjustable telescopic member and a spiral blade surrounding the circumference of the vertical rod portion.

[0011] As a further optimization of the auxiliary positioning device for a pneumatic rock drill of the utility model, the connector is a tapered block with the small diameter end facing downward.

[0012] As a further optimization of the auxiliary positioning device for a pneumatic rock drill of the utility model, a scale for displaying the position of the screw is provided on the positioning cylinder.

[0013] The utility model has the following beneficial effects: the utility model arranges a plurality of universal balls with ball ends facing each other inside the positioning cylinder, thereby forming a support space inside the positioning cylinder for the rotation of the drill rod of the pneumatic rock drill; at the same time, the positioning cylinder is set to a trumpet shape, and the universal ball is enabled to move along the longitudinal direction of the positioning cylinder. When the universal ball moves, because the diameter of the positioning cylinder gradually decreases or increases along its longitudinal direction, the position of the universal ball will also change relatively, thereby changing the size of the positioning space, making it suitable for drill rods of pneumatic rock drills of different specifications and sizes, and improving the use range of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of the auxiliary positioning device of the utility model;

[0015] Reference numerals: 1. connector, 2. adjustable telescopic member, 3. positioning platform, 4. screw, 5. holding nut, 6. long hole, 7. universal ball, 8. positioning cylinder. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0017] like Figure 1 As shown, the present invention provides an auxiliary positioning device for a pneumatic rock drill, capable of assisting in positioning drill rods of different sizes. The auxiliary positioning device provided by the present invention includes a positioning frame and a positioning cylinder 8 disposed on the top of the positioning frame. The positioning frame is used to fix and support the positioning cylinder 8, and the positioning cylinder 8 is used to allow the drill rod of the pneumatic rock drill to pass through, thereby positioning and supporting the passed drill rod.

[0018] In this embodiment, the positioning tube 8 is trumpet-shaped, specifically, its cross-section is shaped like a figure eight. Within the positioning tube 8 are located no fewer than three universal balls 7, with their ends facing each other, creating a positioning space for the rock drill's rotating rod to pass through. The universal balls 7 are slidably mounted on the inner wall of the positioning tube 8. As the universal balls 7 move longitudinally along the positioning tube 8, their positions change relative to the diameter of the positioning tube 8, gradually decreasing along the longitudinal direction. This changes the size of the positioning space, allowing it to accommodate pneumatic rock drill rods of varying sizes.

[0019] In this embodiment, the positioning cylinder 8 is circumferentially defined with elongated holes 6 corresponding to the universal balls 7. These holes 6 are arranged longitudinally along the positioning cylinder 8. Screws 4 are slidably positioned within each of these holes. One end of each screw 4 penetrates the positioning cylinder 8 and connects to the back of the corresponding universal ball 7. The other end of each screw 4 extends outside the positioning cylinder 8 and is threadedly connected to a retaining nut 5. The combination of the screws 4 and the elongated holes 6 enables the universal balls 7 to move longitudinally along the positioning cylinder 8. The combination of the retaining nut 5, screw 4, and universal balls 7 controls the position of the universal balls 7.

[0020] By twisting the supporting nut 5, the distance between the supporting nut 5 and the universal ball 7 can be changed, so that the distance between the nut 5 and the universal ball 7 is slightly smaller than the thickness of the wall of the positioning tube 8, so that the nut 5 and the universal ball 7 can clamp the wall of the positioning tube 8 and achieve positioning by friction.

[0021] In this embodiment, the rod body of the screw rod 4 located in the elongated hole 6 is covered with a friction silicon sleeve. The friction silicon sleeve can increase the sliding resistance of the screw rod 4, making it difficult to slide easily. At the same time, a scale showing the position of the screw rod 4 is also provided on the positioning cylinder 8.

[0022] In this embodiment, the positioning frame includes a positioning platform 3, a connector 1, and an adjustable telescopic member 2 connected between the positioning platform 3 and the connector 1. The positioning cylinder 8 is fixed to the upper end surface of the positioning platform 3. The adjustable telescopic member 2 can adjust the height of the positioning frame, thereby making the equipment more widely used. The connector 1 is used to fix the positioning frame to the ground.

[0023] In this embodiment, two specific structures of the adjustable telescopic member 2 are provided. The first is that the adjustable telescopic member 2 is a hydraulic rod. The second is that the adjustable telescopic member 2 is a bolt-type telescopic rod. Both are common existing telescopic rods and will not be explained in detail here.

[0024] In this embodiment, the connector 1 is used to better secure the positioning frame to the ground. Two configurations are provided for the connector 1. The first configuration utilizes a tapered block with the smaller end facing downward. This allows for easy insertion into the ground, providing stable support. The second configuration includes a vertical rod connected to the lower end of the adjustable telescopic member 2 and spiral blades surrounding the vertical rod. Rotating the connector 1 causes the spiral blades to be screwed into the ground, providing secure support.

[0025] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. An auxiliary positioning device for a pneumatic rock drill, comprising a positioning frame and a positioning cylinder (8) arranged on the top of the positioning frame, characterized in that: The inner diameter of the positioning cylinder (8) gradually decreases from one end to the other end. The positioning cylinder (8) is provided with at least three elongated holes (6) around its circumference. The elongated holes (6) are arranged along the longitudinal direction of the positioning cylinder (8). Screws (4) are slidably arranged in the elongated holes (6). One end of the screw (4) penetrates into the positioning cylinder (8) and is connected to a universal ball (7). The other end of the screw (4) extends to the outside of the positioning cylinder (8) and is screwed to a top holding nut (5). The ball ends of all the universal balls (7) are opposite to each other and form a positioning space for the rock drill rotating rod to pass through.

2. The auxiliary positioning device for a pneumatic rock drill according to claim 1, characterized in that: The positioning frame comprises a positioning platform (3), a connector (1), and an adjustable telescopic member (2) arranged between the positioning platform (3) and the connector (1); a positioning cylinder (8) is fixed on the upper end surface of the positioning platform (3).

3. The auxiliary positioning device for a pneumatic rock drill according to claim 2, characterized in that: The adjustable telescopic member (2) is a hydraulic rod.

4. The auxiliary positioning device for a pneumatic rock drill according to claim 2, characterized in that: The adjustable telescopic member (2) is a bolt-type telescopic rod.

5. The auxiliary positioning device for a pneumatic rock drill according to claim 2, characterized in that: The connector (1) comprises a vertical rod portion for fixing the lower end surface of the adjustable telescopic member (2) and spiral blades surrounding the circumference of the vertical rod portion.

6. The auxiliary positioning device for a pneumatic rock drill according to claim 2, characterized in that: The connector (1) is a tapered block with the smaller diameter end facing downward.

7. The auxiliary positioning device for a pneumatic rock drill according to claim 1, characterized in that: The rod body of the screw rod (4) located in the elongated hole (6) is provided with a friction silicon sleeve.

8. The auxiliary positioning device for a pneumatic rock drill according to claim 1, characterized in that: The positioning cylinder (8) is provided with a scale for displaying the position of the screw (4).

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