Positioning device for machining straight shank bit leg

Abstract

The utility model discloses a positioning device for processing a straight shank bit leg, which comprises a positioning disc, a positioning block, a conical screw rod, a fastening screw rod, a wedge block component and a standard hydraulic chuck, a square positioning hole is arranged on the positioning disc, the bottom of the square positioning hole is provided with the detachable positioning block for supporting the bit leg upwards, and the conical screw rod is arranged on the positioning block. A square positioning hole is formed in the positioning disc, a fastening screw is in threaded connection with the position, above the square positioning hole, of the positioning disc, the fastening screw is rotated to position the bit leg downwards in the Z-axis direction, a square groove is formed in one side of the square positioning hole, and a wedge block assembly used for positioning the bit leg in the X-axis direction is installed in the square groove.

Description

Technical Field

[0001] The utility model relates to the technical field of tooth palm processing, in particular to a positioning device for processing straight shank tooth palms. Background Art

[0002] The tooth palm is a component of the pile foundation drill bit. The connection methods between the tooth palm and the pile foundation drill bit include: welding connection, threaded connection, socket connection, sleeve connection, etc. Among them, the socket connection usually requires the tail of the tooth palm to have a straight shank so that it can be smoothly inserted into the socket hole of the drill bit to ensure a close fit and stable connection between the tooth palm and the drill bit. When the tail of the tooth palm is intermittently turned, the tail of the tooth palm will continue to be impacted and vibrated. If the rigidity of the fixture is insufficient, the tooth palm will be displaced or deformed during the processing, thereby affecting the processing accuracy.

[0003] The utility model patent with application number CN201721907404.4 discloses a tooth palm clamp, which fixes the tooth palm with a U-shaped plate, left and right clamping claws and an elastic clamping seat, and can realize left and right flipping. However, the tooth palm will be subjected to continuous impact and vibration during intermittent turning, and the elastic clamp cannot meet the rigidity requirements of intermittent turning; the invention patent with application number CN202410765184.4 discloses a tooth palm three-point positioning hole processing device, which uses an inherent clamping device on the workbench to first fix the tooth palm shaft neck, and then combines the sliding limit support device on the workbench to support the tooth palm tail, thereby realizing the fixation of the tooth palm. The tooth palm shaft neck is in an inclined state after fixation, and the fixed tooth palm cannot rotate, which cannot meet the full-range processing of the straight shank at the tail of the tooth palm.

[0004] Based on the above defects and deficiencies, it is necessary to improve the existing technology and design a positioning device for processing straight shank tooth palms. Utility Model Content

[0005] The main technical problem solved by the utility model is to provide a positioning device for processing a straight-shank tooth palm, which solves the problem of all-round clamping and fixing the tooth palm and provides sufficient rigidity for processing the tail of the tooth palm.

[0006] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a positioning device for processing straight-shank tooth palms, which includes a positioning plate, a positioning block, a conical screw, a tightening screw, a wedge block assembly and a standard hydraulic chuck.

[0007] Preferably, a square positioning hole is provided on the positioning plate, and a detachable positioning block for supporting the tooth palm upward is installed at the bottom of the square positioning hole. A fastening screw is threadedly connected to the positioning plate above the square positioning hole, and the fastening screw is rotated to position the tooth palm downward in the Z-axis direction. A square groove is provided on one side of the square positioning hole, and a wedge block assembly for positioning the tooth palm in the X-axis direction is installed in the square groove.

[0008] Preferably, the upper end surface of the positioning block is provided with a contoured surface for supporting the tooth palm journal, and the angle of the contoured surface can be adjusted according to the angle of the tooth palm journal of the processed tooth palm.

[0009] Preferably, two left-right symmetrical threaded holes are provided at the lower end of the square positioning hole, and conical screws for locking the positioning block are threadedly connected to the threaded holes.

[0010] Preferably, the wedge block assembly includes a left wedge block, a right wedge block and a screw, the left wedge block is in the shape of an inverted trapezoid, the right wedge block is in the shape of a regular trapezoid, the inclined surfaces of the left and right wedge blocks are placed in contact with each other, the square groove radially limits the left wedge block, and a sliding groove is provided at the bottom of the square groove to limit the left and right movement of the right wedge block. When the left wedge block moves downward, the inclined surface of the left wedge block pushes the inclined surface of the right wedge block downward to slide rightward.

[0011] Preferably, a vertical threaded hole is provided in the left wedge block, and a through hole is provided at the positioning plate below the square groove. The top of the through hole is connected to the threaded hole in the left wedge block, and the screw passes through the through hole and is threadedly connected to the threaded hole on the left wedge block.

[0012] Preferably, the periphery of the positioning plate is clamped by three standard hydraulic chucks, and the three standard hydraulic chucks are in a three-claw shape.

[0013] Preferably, a standard hydraulic chuck is provided with special jaws for clamping the positioning disc.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The tooth palm is placed on the positioning block through the positioning hole. The angle of the profiling surface on the upper end of the positioning block can be adjusted according to the angle of the tooth palm shaft neck of the processed tooth palm.

[0016] The tightening screw presses the tooth palm downward in the Z-axis direction to limit the freedom of the tooth palm in the Z-axis direction;

[0017] The screw cooperates with the left wedge block. Rotating the screw moves the left wedge block in the vertical direction, thereby driving the right wedge block to slide left and right, limiting the freedom of the palm in the X-axis direction.

[0018] The above limiting means ensure that the workpiece is subjected to a firm clamping force during the processing, which can provide sufficient rigidity for processing.

[0019] The periphery of the positioning plate is clamped by three standard hydraulic chucks equipped with special jaws. The positioning plate rotates with the standard hydraulic chucks to allow full-scale processing of the straight shank at the tail of the tooth palm. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure is a structural diagram of a positioning device for processing straight-shank tooth palms.

[0021] Figure 2 The figure is a cross-sectional view of a positioning device for machining straight-shank tooth palms.

[0022] Figure 3 The figure is a schematic diagram of the positioning plate structure of a positioning device for processing straight shank tooth palms.

[0023] Among them, 1. Positioning plate; 10. Positioning hole; 20. Positioning groove; 2. Positioning block; 3. Conical screw; 4. Fastening screw; 5. Wedge block assembly; 501. Left wedge block; 502. Right wedge block; 503. Screw; 6. Standard hydraulic chuck; 7. Tooth palm journal. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0025] like Figure 1 As shown, the positioning device for processing straight shank tooth palms of the utility model includes: a positioning plate 1, a positioning block 2, a conical screw 3, a fastening screw 4, a wedge block assembly 5 and a standard hydraulic chuck 6.

[0026] A square positioning hole 10 is provided in the positioning plate 1, and the square positioning hole 10 can be used for the tooth palm 7 to pass through. A positioning block 2 is installed at the bottom of the square positioning hole 10. The upper end surface of the positioning block 2 is provided with a contoured surface for supporting the tooth palm shaft neck. The angle of the contoured surface can be adjusted according to the angle of the tooth palm shaft neck of the processed tooth palm 7. The positioning block 2 can be detachably installed to the bottom of the square positioning hole 10. Two left-right symmetrical threaded holes are provided at the lower end of the square positioning hole 10. Conical screws 3 are threadedly connected to the threaded holes. The two conical screws 3 pass through the threaded holes and are tightened upward to lock the positioning block 2.

[0027] A threaded hole is provided at the positioning plate 1 above the square positioning hole 10, and a fastening screw 4 is threadedly connected to the threaded hole. The fastening screw 4 is opposite to the upper end face of the tooth palm 7 at the square positioning hole 10. When the fastening screw 4 is rotated, the fastening screw 4 presses the upper end face of the palm shaft neck downward, providing a clamping force in the Z-axis direction to the tooth palm shaft neck.

[0028] One side of the square positioning hole 10 serves as the X-direction positioning base surface, and a square groove 20 is provided on the other side of the square positioning hole 10. A wedge block assembly 5 is installed in the square groove 20. The wedge block assembly 5 includes a left wedge block 501, a right wedge block 502 and a screw 503. The left wedge block 501 is in the shape of an inverted trapezoid, and the right wedge block 502 is in the shape of a regular trapezoid. The inclined surfaces of the left and right wedge blocks are placed in contact with each other. A vertical threaded hole is provided in the left wedge block 501. A through hole is provided at the positioning plate 1 below the square groove 20, and the through hole is aligned with the threaded hole in the left wedge block 501 above the through hole. After passing through the through hole, the screw rod 503 is threadedly connected to the threaded hole on the left wedge block 501. The square groove 20 radially limits the left wedge block 501. A sliding groove is provided at the bottom of the square groove 20 to limit the left and right movement of the right wedge block 502. When the screw rod 503 is rotated, the screw rod 503 drives the left wedge block 501 to move in the vertical direction. When the left wedge block 501 moves downward, the inclined surface of the left wedge block 501 pushes the inclined surface of the right wedge block 502 downward to slide to the right. The right wedge block 502 presses the left side of the tooth palm shaft neck to the right, providing a clamping force in the X-axis direction to the tooth palm shaft neck.

[0029] The periphery of the positioning disk 1 is clamped by three standard hydraulic chucks 6. The three standard hydraulic chucks 6 are evenly distributed with the center of the positioning disk 1 as the center of the circle, forming a three-claw shape. The three standard hydraulic chucks 6 are all equipped with special claws, and grooves are provided on the claws. The grooves can clamp the positioning disk 1, thereby fixing the positioning disk 1.

[0030] like Figure 3 As shown, a square positioning hole 10 is provided in the positioning plate 1, through which the tooth palm 7 can pass. The tooth palm shaft neck is clamped in the square positioning hole 10, and the tail straight handle of the tooth palm 7 can be completely exposed outside the positioning plate. At this time, the tail straight handle of the tooth palm 7 can be processed in all directions.

[0031] When the utility model is a positioning device for processing a straight-shank tooth palm, the tooth palm 7 passes through the square positioning hole 10 in the middle of the positioning plate 1, and the tooth palm shaft neck is placed in the square positioning hole 10. The lower end surface of the tooth palm shaft neck fits with the contoured surface of the upper end of the positioning block 2. The fastening screw 4 above the positioning plate 1 rotates downward to provide a clamping force in the Z-axis direction to the tooth palm shaft neck, thereby limiting the freedom of the tooth palm 7 in the Z-axis direction. The screw 503 cooperates with the wedge assembly 5, and the rotating screw 503 causes the left wedge block 501 to move downward, thereby driving the right wedge block 502 to slide to the right, pressing the left side of the tooth palm shaft neck, providing a clamping force in the X-axis direction to the tooth palm shaft neck, thereby limiting the freedom of the tooth palm 7 in the X-axis direction. The periphery of the positioning plate 1 is clamped by three standard hydraulic chucks 6 equipped with special claws, and the positioning plate 1 rotates with the standard hydraulic chuck 6 to process the straight shank at the tail of the tooth palm 7.

[0032] The utility model discloses a positioning device for processing a straight-shank tooth palm, which can clamp and fix the tooth palm in all directions and provide sufficient rigidity for processing the tail of the tooth palm.

[0033] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A positioning device for machining a straight shank tooth palm, comprising a positioning plate (1), a positioning block (2), a conical screw (3), a tightening screw (4), a wedge block assembly (5) and a standard hydraulic chuck (6), characterized in that: The positioning plate (1) is provided with a square positioning hole (10), a detachable positioning block (2) for upwardly supporting the tooth palm (7) is installed at the bottom of the square positioning hole (10), a fastening screw (4) is threadedly connected to the positioning plate (1) above the square positioning hole (10), and the fastening screw (4) is rotated to press the tooth palm (7) downward in the Z-axis direction. A square groove (20) is provided on one side of the square positioning hole (10), and a wedge block assembly (5) for positioning the tooth palm (7) in the X-axis direction is installed in the square groove (20).

2. A positioning device for machining a straight shank tooth base according to claim 1, characterized in that: The upper end surface of the positioning block (2) is provided with a profiling surface for supporting the tooth palm axis neck, and the angle of the profiling surface can be adjusted according to the angle of the tooth palm axis neck of the processed tooth palm (7).

3. The positioning device for machining a straight shank tooth base according to claim 1, characterized in that: The lower end of the square positioning hole (10) is provided with two left-right symmetrical threaded holes, and the threaded holes are threadedly connected with conical screws (3) for locking the positioning block (2).

4. The positioning device for machining a straight shank tooth base according to claim 1, characterized in that: The wedge block assembly (5) comprises a left wedge block (501), a right wedge block (502) and a screw (503). The left wedge block (501) is in the shape of an inverted trapezoid, and the right wedge block (502) is in the shape of a regular trapezoid. The inclined surfaces of the left and right wedge blocks are placed in contact with each other. The square groove (20) radially limits the left wedge block (501). A sliding groove is provided at the bottom of the square groove (20) to limit the left and right movement of the right wedge block (502). When the left wedge block (501) moves downward, the inclined surface of the left wedge block (501) pushes the inclined surface of the right wedge block (502) downward to slide rightward.

5. The positioning device for machining a straight shank tooth base according to claim 4, characterized in that: A vertical threaded hole is provided in the left wedge-shaped block (501), and a through hole is provided at the positioning plate (1) below the square slot (20). The upper portion of the through hole is communicated with the threaded hole inside the left wedge-shaped block (501), and the screw (503) passes through the through hole and is threadedly connected to the threaded hole on the left wedge-shaped block (501).

6. The positioning device for machining a straight shank tooth base according to claim 1, characterized in that: The periphery of the positioning plate (1) is clamped by three standard hydraulic chucks (6), and the three standard hydraulic chucks (6) are in a three-claw shape.

7. The positioning device for machining a straight shank tooth base according to claim 6, characterized in that: The standard hydraulic chuck (6) is provided with special clamping claws for clamping the positioning disc (1).

Images