Palm drill locking pin hole positioning device

Abstract

The present invention discloses a positioning device for a locking pin hole of a tooth palm drill, comprising a base, a spindle fixing plate arranged on the upper part of the base, an adjusting block arranged at the lower part of the base and capable of being raised and lowered, a tie rod type spindle penetrating the spindle fixing plate, and a positioning plate having a tool positioning hole connected to the spindle fixing plate and located above the tie rod type spindle; the adjusting block supports the tooth palm and cooperates with the tie rod type spindle to expand the air jet hole of the tooth palm. The present invention realizes accurate positioning of the locking pin hole and improves processing efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of machining, and in particular relates to a locking pin hole positioning device for a dental drill. Background Art

[0002] At present, the jet hole structure of the three-cone drill bit for mining is mostly pin-type locking, see attached Figure 1 . Depending on different working conditions, the jet hole needs to be installed with nozzles 1 of different aperture sizes. The nozzle 1 is fixed with a locking pin 11, which is inserted into the locking pin hole 12 from the side and wrapped in the pin groove formed by the nozzle 1 and the jet hole 13, so as to fix the nozzle 1. Since the position of the jet hole relative to the 120° surface of the tooth palm is not a simple planar position relationship, but a more complex spatial position relationship. Therefore, if the 120° surface of the tooth palm is used as the positioning reference, two angle changes are required to move the locking pin hole to the correct processing position. Due to the diversity of the jet hole angles, the cost of tooling production is increased, and it is inconvenient to change the product model, which does not meet the principles of processing economy and efficiency. Summary of the invention

[0003] The purpose of the present invention is to solve the above technical problems and provide a positioning device for a locking pin hole of a dental palm drill, so as to accurately position the locking pin hole and improve processing efficiency. In order to achieve the above purpose, the technical solution of the present invention is as follows:

[0004] A tooth palm drill locking pin hole positioning device comprises a base, a spindle fixing plate arranged on the upper part of the base, an adjusting block arranged at the lower part of the base and capable of being raised and lowered, a pull rod type spindle penetrating the spindle fixing plate, and a positioning plate having a tool positioning hole connected to the spindle fixing plate and located above the pull rod type spindle; the adjusting block supports the tooth palm and cooperates with the pull rod type spindle to expand the air jet hole of the tooth palm.

[0005] Specifically, the base includes a bottom plate and side plates which are connected to each other in an L-shaped structure; an adjustment block is provided on the top of the bottom plate, and the adjustment block is threadedly connected to the bottom plate.

[0006] Specifically, the spindle fixing plate and the side plate are arranged vertically relative to each other.

[0007] Specifically, a step surface is provided on the top of the spindle fixing plate, and the positioning plate is locked and connected to the step surface by bolts, and the top of the positioning plate is flush with the top of the spindle fixing plate.

[0008] Specifically, the pull rod type spindle includes a connecting sleeve, an expansion spring sleeve arranged at the end of the connecting sleeve, and a pull rod arranged inside the connecting sleeve, connected to the expansion spring sleeve and extending outward.

[0009] Specifically, the connecting sleeve is placed in the spindle fixing plate, and the end of the pull rod exposed from the spindle fixing plate is screwed on to the nut.

[0010] Specifically, the spindle fixing plate is also provided with an anti-rotation block for clamping the connecting sleeve.

[0011] Compared with the prior art, the beneficial effects of the positioning device for locking pin hole of a dental palm drill of the present invention are mainly reflected in:

[0012] The adjusting block cooperates with the pull rod type spindle to quickly locate the tooth palm, and the tool positioning hole in the positioning plate effectively locates the locking pin hole position to improve processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a partial structural diagram of the existing product palm;

[0014] Figure 2 for Figure 1 AA cross-sectional view of ;

[0015] Figure 3 for Figure 2 BB cross-sectional view;

[0016] Figure 4 This is one of the structural diagrams of this embodiment;

[0017] Figure 5 This is the second structural diagram of this embodiment;

[0018] Figure 6 This is a schematic diagram of the structure of the pull rod type spindle of this embodiment;

[0019] Figure 7 This is one of the structural schematic diagrams of the tooth palm being positioned in place in this embodiment;

[0020] Figure 8 This is the second structural diagram of the tooth palm being positioned in place in this embodiment;

[0021] The numbers in the figure represent:

[0022] 1 nozzle, 11 locking pin, 12 locking pin hole, 13 air injection hole;

[0023] 2 spindle fixing plate, 21 step surface, 3 adjustment block, 4 positioning plate, 41 tool positioning hole, 5 tooth palm, 6 bottom plate, 61 side plate, 62 bolt hole, 7 connecting sleeve, 71 expansion spring sleeve, 72 pull rod, 73 protrusion, 74 nut, 8 anti-rotation block. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0025] Example:

[0026] Reference Figure 1-8 As shown, this embodiment is a positioning device for locking pin holes of a tooth palm drill, comprising a base, a spindle fixing plate 2 arranged on the upper part of the base, an adjusting block 3 which can be raised and lowered and arranged on the lower part of the base, a tie rod type spindle penetrating the spindle fixing plate 2, and a positioning plate 4 having a tool positioning hole 41 connected to the spindle fixing plate 2 and located above the tie rod type spindle; the adjusting block 3 supports the tooth palm 5 and cooperates with the tie rod type spindle to expand the jet hole 13.

[0027] The base includes a bottom plate 6 and a side plate 61 which are connected to each other in an L-shaped structure; an adjusting block 3 is provided on the top of the bottom plate 6, and the adjusting block 3 is threadedly connected to the bottom plate 6, and its lifting position is controlled by adjusting the depth of the adjusting block 3 screwed into the bottom plate 6.

[0028] A plurality of bolt holes 62 are provided on the side plate 61 to facilitate the positioning and installation of the side plate 61 on the working table of the drilling and milling machine (not shown in the figure).

[0029] The spindle fixing plate 2 is vertically arranged relative to the side plate 61 , and the spindle fixing plate 2 is fastened and connected to the side plate 61 by bolts.

[0030] A step surface 21 is provided on the top of the spindle fixing plate 2 , and the positioning plate 4 is locked and connected to the step surface 21 by bolts, and the top of the positioning plate 4 is flush with the top of the spindle fixing plate 2 .

[0031] The rod-type spindle includes a connecting sleeve 7, an expansion spring sleeve 71 disposed at the end of the connecting sleeve 7, and a rod 72 disposed inside the connecting sleeve 7 and connected to the expansion spring sleeve 71 and extending outward; the expansion spring sleeve 71 is provided with a T-shaped protrusion 73, and the connecting sleeve 7 is provided with a bayonet (not marked in the figure) corresponding to the protrusion 73. When the rod 72 is screwed into the connecting sleeve 7 clockwise, the expansion spring sleeve 71 expands due to elastic expansion; when the rod 72 is screwed out counterclockwise to the outside of the connecting sleeve 7, the expansion spring sleeve 71 relaxes and resets. The rod-type spindle is a conventional application structure of existing spindles.

[0032] A pull rod type spindle is transversely penetrated in the spindle fixing plate 2 , and a connecting sleeve 7 is placed in the spindle fixing plate 2 , and a nut 74 is screwed on the end of the pull rod 72 exposed from the spindle fixing plate 2 .

[0033] The spindle fixing plate 2 is also provided with an anti-rotation block 8 for clamping the connecting sleeve 7. When the pull rod 72 rotates, the connecting sleeve 7 is stably positioned and fixed.

[0034] The tooth palm 5 is provided with an injection hole 13 and a locking pin hole 12, the adjustment block 3 supports the tooth palm 5, the expansion spring sleeve 71 is aligned with the corresponding injection hole 13, and the tool positioning hole 41 in the positioning plate 4 effectively positions the drill bit (not shown in the figure) to align the locking pin hole 12 for processing.

[0035] When this embodiment is used, the adjusting block 3 cooperates with the pull rod type spindle to achieve rapid positioning of the tooth palm 5, and the tool positioning hole 41 in the positioning plate 4 effectively positions the locking pin hole 12, thereby improving the processing efficiency.

[0036] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A locking pin hole positioning device for a palm drill, characterized in that: The invention comprises a base, a spindle fixing plate arranged on the upper part of the base, an adjusting block which can be raised and lowered and arranged on the lower part of the base, a pull rod type spindle which passes through the spindle fixing plate, and a positioning plate which has a tool positioning hole and is connected to the spindle fixing plate and is located above the pull rod type spindle; the adjusting block supports the tooth palm and cooperates with the jet hole of the pull rod type spindle to expand the tooth palm; the base comprises a bottom plate and a side plate which are connected to each other in an L-shaped structure; an adjusting block is arranged on the top of the bottom plate, and the adjusting block is threadedly connected to the bottom plate; a step surface is arranged on the top of the spindle fixing plate, and the positioning plate is connected to the step surface by bolts, and the top of the positioning plate is arranged flush with the top of the spindle fixing plate; the pull rod type spindle comprises a connecting sleeve, an expansion spring sleeve arranged at the end of the connecting sleeve, and a pull rod which is arranged inside the connecting sleeve and connected to the expansion spring sleeve and extends outward; the connecting sleeve is placed in the spindle fixing plate, and a nut is screwed on the end of the pull rod which is exposed from the spindle fixing plate; an anti-rotation block for clamping the connecting sleeve is also provided on the spindle fixing plate.

2. The locking pin hole positioning device for a dental drill according to claim 1, characterized in that: The spindle fixing plate and the side plate are arranged vertically relative to each other.

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