Single-edge drill bit of stepped shaft

Abstract

The utility model discloses a single-blade drill bit of stepped shaft, including base, chute, slider, stepped shaft single-blade drill bit, lead screw and transmission mechanism, the chute is provided in the top of base, slider is slidingly clamped in the chute, stepped shaft single-blade drill bit is connected on the slider, and lead screw is rotatingly connected in the chute and is in screw-thread fit with the screw hole on the slider. The stepped shaft single-blade drill bit has the advantages that the sliding block is in threaded linkage through rotation of the lead screw, the stepped shaft single-blade drill bit is driven to slide on the base in a reciprocating mode, then the stepped shaft single-blade drill bit can abut against a workpiece and be separated from the workpiece, and due to the arrangement of the transmission mechanism, when the lead screw rotates, the stepped shaft single-blade drill bit can be driven to rotate. The forward transmission gear or the reverse transmission gear can be meshed with the transmission gear through rotation of the adjusting plate, then the transmission gear and the lead screw are driven to rotate in the forward direction or the reverse direction, it is avoided that a motor and electric control equipment with the adjustable driving direction need to be used, and the machining cost and the economic burden are greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drill bit, concretely is a single -edged drill bit of ladder axle belongs to drill bit technical field. BACKGROUND

[0002] In the mechanical manufacturing industry, when drilling, standard twist drills are usually used for drilling, with the development of the times and technology, the drill bit also produces a variety of different models, and each model is applied to different scenes, however, the opening diameter of each model of drill bit is often certain, in the face of a variety of diameter opening operation, the drill bit needs to be replaced frequently, in order to cope with this situation, the single -edged drill bit of ladder axle is produced.

[0003] However, the existing single -edged drill bit of ladder axle has various problems, for example, in the ladder-shaped cutting drill disclosed in the publication No. CN207887934U, although the cutting chips can be broken by the plurality of steps, which facilitates chip removal, improves chip removal capacity, reduces cutting vibration, improves drilling surface precision and prolongs the service life of the drill bit, but since the drill bit often needs to be driven by external transmission equipment, such as a motor-driven screw rod, the sliding block threaded linkage for supporting the drill bit is used to drive it, so that the drill bit and the workpiece are in abutment and separation, and in the process of reciprocating movement of the drill bit, the driving direction of the motor needs to be changed, and the motor capable of changing the driving direction generally has high cost, and needs to be combined with the electric control equipment for use, further increasing the operation cost, and causing unnecessary economic burden. UTILITY MODEL CONTENTS

[0004] The technical scheme of the utility model provides a solution significantly different from the prior art in view of the technical problem that the prior art solution is too single, and specifically, the purpose of the utility model is to solve the above-mentioned shortcomings in the prior art, and a single -edged drill bit of ladder axle is provided.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A single -edged drill bit of ladder axle, comprising a base, a sliding groove, a sliding block, a ladder axle single -edged drill bit, a screw rod and a transmission mechanism, the sliding groove is arranged at the top of the base, the sliding block is slidingly connected in the sliding groove, the ladder axle single -edged drill bit is connected to the sliding block, the screw rod is rotatably connected in the sliding groove and is threadedly matched with the screw hole on the sliding block, and the transmission mechanism is arranged on one side of the base.

[0007] The transmission mechanism comprises a transmission gear, a supporting plate, an adjusting plate, a driving gear, a transmission motor and a forward-reverse adjusting unit, the transmission gear is coaxially fixed at one end of a lead screw, the supporting plate is fixed at one side of the bottom base, the adjusting plate is rotationally connected to the supporting plate, the driving gear is coaxially fixed on the output shaft of the transmission motor, and the transmission motor is fixed at one side of the top of the bottom base.

[0008] As a further scheme of the utility model: the forward-reverse adjusting unit comprises a forward transmission gear, a driven gear and a reverse transmission gear, the forward transmission gear is rotationally connected to one side of the adjusting plate and is engaged with the driving gear, the reverse transmission gear is rotationally connected to the other side of the adjusting plate, and the driven gear is rotationally connected to the adjusting plate and is engaged between the driving gear and the reverse transmission gear.

[0009] As a further scheme of the utility model: a limiting mechanism is arranged at one side of the supporting plate, the limiting mechanism comprises a positioning disc and a limiting rod, the adjusting plate is rotationally connected to the supporting plate through a rotating rod, a plurality of notches are arranged at the edge of the positioning disc, the positioning disc is coaxially fixed on the rotating rod of the adjusting plate and is located at one side of the supporting plate, a protrusion is arranged on the supporting plate, the limiting rod is slidingly connected to the protrusion, and one end of the limiting rod is clamped into the notch at the edge of the positioning disc.

[0010] As a further scheme of the utility model: a spring is fixed to the bottom of the limiting rod, and one end of the spring is fixed to the protrusion on the supporting plate.

[0011] As a further scheme of the utility model: the cross sections of the sliding groove and the sliding block are all trapezoidal structures, and the sliding block is slidingly fitted in the sliding groove.

[0012] As a further scheme of the utility model: a butt joint sleeve is fixed to the sliding block, a locking screw is screwed to the side wall of the butt joint sleeve, and the stepped shaft single-blade drill bit is inserted into the butt joint sleeve and is locked through the locking screw.

[0013] The utility model discloses the beneficial effects are:

[0014] In the utility model, the sliding block thread linkage is made through the rotation of the lead screw, and the stepped shaft single-blade drill bit is reciprocatingly slid on the bottom base, so that the stepped shaft single-blade drill bit can abut against and separate from the workpiece, the forward transmission gear or the reverse transmission gear is engaged with the transmission gear through the rotation of the adjusting plate when the lead screw rotates, so that the transmission gear and the lead screw are driven to rotate forwardly or reversely, the motor and the electric control equipment with adjustable driving direction are not needed, the processing cost and the economic burden are greatly reduced, and the adjusting plate can be synchronously locked when being rotated to a certain angle through the arrangement of the limiting mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the whole structure schematic view of the utility model;

[0016] Figure 2 It is the sliding block and its connecting structure schematic view of the utility model;

[0017] Figure 3 It is the local amplification structure schematic view of the utility model;

[0018] Figure 4 It is the transmission mechanism structure schematic view of the utility model.

[0019] In the drawing: 1, base, 2, sliding slot, 3, sliding block, 4, single blade drill bit of stepped shaft, 5, screw rod, 6, transmission mechanism, 61, transmission gear, 62, support plate, 63, adjusting plate, 64, driving gear, 65, transmission motor, 66, forward transmission gear, 67, driven gear, 68, reverse transmission gear, 7, limiting mechanism, 71, positioning disc, 72, limiting rod, 73, spring, 8, butt joint sleeve, 9, locking screw. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model. Embodiment one

[0021] As Figures 1 to 4 shown, a single blade drill bit of stepped shaft includes base 1, sliding slot 2, sliding block 3, single blade drill bit of stepped shaft 4, screw rod 5 and transmission mechanism 6, sliding slot 2 is arranged at the top of base 1, sliding block 3 is slidingly connected in sliding slot 2, single blade drill bit of stepped shaft 4 is connected on sliding block 3, screw rod 5 is rotationally connected in sliding slot 2 and is threadedly matched with the screw hole on sliding block 3, and transmission mechanism 6 is arranged at one side of base 1.

[0022] Transmission mechanism 6 includes transmission gear 61, support plate 62, adjusting plate 63, driving gear 64, transmission motor 65 and forward and reverse adjusting unit, transmission gear 61 is coaxially fixed at one end of screw rod 5, support plate 62 is fixed at one side outside base 1, adjusting plate 63 is rotationally connected on support plate 62, driving gear 64 is coaxially fixed on the output shaft of transmission motor 65, and transmission motor 65 is fixed at one side on the top of base 1.

[0023] The forward and reverse adjusting unit comprises a forward transmission gear 66, a driven gear 67 and a reverse transmission gear 68, the forward transmission gear 66 is rotationally connected on one side of the adjusting plate 63 and is engaged with the driving gear 64, the reverse transmission gear 68 is rotationally connected on the other side of the adjusting plate 63, and the driven gear 67 is rotationally connected on the adjusting plate 63 and is engaged between the driving gear 64 and the reverse transmission gear 68;

[0024] A limiting mechanism 7 is arranged on one side of the supporting plate 62, the limiting mechanism 7 comprises a positioning disc 71 and a limiting rod 72, the adjusting plate 63 is rotationally connected with the supporting plate 62 through a rotating rod, the positioning disc 71 is coaxially fixed on the rotating rod of the adjusting plate 63 and is located on one side of the supporting plate 62, a protrusion is arranged on the supporting plate 62, and the limiting rod 72 is slidingly connected on the protrusion and is clamped at one end in the slot on the edge of the positioning disc 71.

[0025] In the utility model, the rotation of the screw rod 5 makes the sliding block 3 threadedly link, drives the stepped shaft single blade drill bit 4 to reciprocate on the base 1, further makes the stepped shaft single blade drill bit 4 can be in abutment with workpiece and separates, and through the setting of the transmission mechanism 6, when the screw rod 5 rotates, the forward transmission gear 66 or the reverse transmission gear 68 can be engaged with the transmission gear 61 through the rotation of the adjusting plate 63, further drives the transmission gear 61 and the screw rod 5 to rotate forward or reversely, avoids needing to use the motor of adjustable driving direction and electric control equipment, greatly reduces the processing cost and economic burden, and simultaneously through the setting of the limiting mechanism 7, when the adjusting plate 63 rotates to a certain angle, can be synchronously locked. Embodiment two

[0026] As Figures 1 to 4 shown, in addition to comprising all the technical features in embodiment one, the embodiment also comprises:

[0027] The bottom of the limiting rod 72 is fixed with a spring 73, one end of the spring 73 is fixed with the protrusion on the supporting plate 62, and the spring 73 makes the limiting rod 72 firmly abut with the positioning disc 71 through the elastic force.

[0028] The cross section of the sliding groove 2 and the sliding block 3 is trapezoidal structure, and the sliding block 3 is slidingly fitted in the sliding groove 2, and the trapezoidal structure limits the sliding block 3 to avoid sliding off.

[0029] The sliding block 3 is fixed with a butt joint sleeve 8, a locking screw 9 is screwed on the side wall of the butt joint sleeve 8, the stepped shaft single blade drill bit 4 is inserted in the butt joint sleeve 8 and is locked through the locking screw 9, and the stepped shaft single blade drill bit 4 is convenient to disassemble and assemble.

[0030] Working principle: when using the drill bit, first, the single blade drill bit 4 is connected with the butt joint sleeve 8, and is locked through the locking screw 9, then the driving motor 65 is started to drive the driving gear 64 to rotate, at this time, the forward transmission gear 66, the driven gear 67 and the reverse transmission gear 68 are engaged with the driving gear 64, at this time, the adjusting plate 63 is rotated, the forward transmission gear 66 or the reverse transmission gear 68 is engaged with the transmission gear 61, and then the transmission gear 61 and the screw rod 5 are driven to rotate forward or reversely, so that the sliding block 3 can quickly reciprocate on the base 1, and when the adjusting plate 63 is rotated, the positioning disc 71 is synchronously rotated, at this time, the limiting rod 72 slides at the edge of the positioning disc 71 and abuts against the corresponding notch on the positioning disc 71, so that the positioning disc 71 is limited.

[0031] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims should be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims.

[0032] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A single-edge drill bit for a stepped shaft, comprising a base (1), a slide groove (2), a slider (3), a single-edge drill bit for a stepped shaft (4), a screw (5) and a transmission mechanism (6), characterized in that: The slide groove (2) is arranged on the top of the base (1), the slider (3) is slidably engaged in the slide groove (2), the stepped shaft single-edge drill bit (4) is connected to the slider (3), the screw rod (5) is rotatably connected in the slide groove (2) and is threadedly engaged with the screw hole on the slider (3), and the transmission mechanism (6) is arranged on one side of the base (1); The transmission mechanism (6) comprises a transmission gear (61), a support plate (62), an adjustment plate (63), a driving gear (64), a transmission motor (65) and a forward and reverse adjustment unit, wherein the transmission gear (61) is coaxially fixed to one end of the screw rod (5), the support plate (62) is fixed to the outer side of the base (1), the adjustment plate (63) is rotatably connected to the support plate (62), the driving gear (64) is coaxially fixed to the output shaft of the transmission motor (65), and the transmission motor (65) is fixed to the top side of the base (1).

2. A single-edge drill bit for a stepped shaft according to claim 1, characterized in that: The forward and reverse adjustment unit comprises a forward transmission gear (66), a driven gear (67) and a reverse transmission gear (68), wherein the forward transmission gear (66) is rotatably connected to one side of the adjustment plate (63) and meshed with the driving gear (64), the reverse transmission gear (68) is rotatably connected to the other side of the adjustment plate (63), and the driven gear (67) is rotatably connected to the adjustment plate (63) and meshed between the driving gear (64) and the reverse transmission gear (68).

3. The single-edge drill bit for a stepped shaft according to claim 1, characterized in that: A limiting mechanism (7) is provided on one side of the support plate (62), and the limiting mechanism (7) includes a positioning plate (71) and a limiting rod (72). The adjustment plate (63) is rotatably connected to the support plate (62) via a rotating rod. A plurality of notches are provided at the edge of the positioning plate (71), and the positioning plate (71) is coaxially fixed on the rotating rod of the adjustment plate (63) and is located on one side of the support plate (62). A protrusion is provided on the support plate (62), and the limiting rod (72) is slidably connected to the protrusion, and one end of the limiting rod (72) is clamped in the notch at the edge of the positioning plate (71).

4. A single-edge drill bit for a stepped shaft according to claim 3, characterized in that: A spring (73) is fixed to the bottom of the limiting rod (72), and one end of the spring (73) is fixed to a protrusion on the support plate (62).

5. The single-edge drill bit for a stepped shaft according to claim 1, characterized in that: The cross-sections of the slide groove (2) and the slider (3) are both trapezoidal in structure, and the slider (3) is slidably fitted in the slide groove (2).

6. The single-edge drill bit for a stepped shaft according to claim 1, characterized in that: A docking sleeve (8) is fixed on the slider (3), and a locking screw (9) is screwed on the side wall of the docking sleeve (8); the stepped shaft single-edge drill bit (4) is inserted into the docking sleeve (8) and locked by the locking screw (9).

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