CN219581825U - Spiral broach - Google Patents

Abstract

The utility model relates to the technical field of machining tools and discloses a spiral broach, which comprises a first fixing rod, wherein a broach tool bit and a short broach are respectively sleeved on the outer wall of the first fixing rod, a fixing long rod is sleeved on the outer wall of the two ends of the first fixing rod, and fixing holes are formed in the outer walls of the first fixing rod and the fixing long rod. Through first dead lever, broach tool bit, short broach, the screw rod cooperation of fixed stock is used, through installing broach tool bit and short broach on first dead lever, the rethread screw rod is with fixed stock and first dead lever connection, the dead lever is fixed broach tool bit and short broach on first dead lever, when meetting the spiral sword groove of damage, take out the dead lever through dismantling the screw rod, take out the short broach that will change again, change it, and then solved current spiral broach and receive the damage to be difficult to repair and lead to changing whole spiral broach at the cutting edge, lead to the problem that processing cost grow.

Description

Spiral broach

Technical Field

The utility model relates to the technical field of machining tools, in particular to a spiral broach.

Background

The broach is a high-precision and high-efficiency multi-tooth tool, and can be used for processing inner and outer surfaces of various shapes. The cemented carbide indexable broach has high cutting efficiency, the application of the cemented carbide indexable broach is becoming wider, and along with the development of miniaturization of a gearbox, a gear in a transmission mechanism needs to be reduced in size under the condition of ensuring strength. This includes inter alia the internal gear. The small size of the internal gear means that the thickness of the gear needs to be reduced accordingly. And the requirements on the machining precision of the internal gear are higher and higher in the aspects of reducing noise and improving the transmission precision while the size is reduced.

The prior spiral broach can refer to Chinese patent with the issued publication number of CN211360921U, and discloses a sheet type internal gear spiral broach, which comprises a cylindrical cutter body, chip flutes and cutting edges, wherein the chip flutes are arranged on the cutter body, the chip flutes are in spiral shapes, the cutting edges are correspondingly spirally distributed on the cutter body, the cutting edges have 2-6 heads, and the front edge surfaces of the cutting edges are spirally arranged. Because the chip flutes and the cutting edges are designed to be spirally distributed and 2-6 heads are designed, the broach can not cut multiple cutter teeth simultaneously when cutting into a workpiece, but a small amount of cutter teeth sequentially and continuously cut into the workpiece, and vibration caused by cutting resistance when cutting into and out of the multiple cutter teeth simultaneously can be effectively reduced. And the front edge surfaces of the cutting edges are arranged in a spiral shape, so that the cutting edges form larger side relief angles, cutting is facilitated, extrusion friction during machining is avoided, the probability of taper generation of a cutter feeding side and a cutter discharging side is reduced, and further machining precision of the thin internal gear is improved. When the device is used, when the cutting edge is damaged, the damaged part cannot be replaced or repaired, so that the effect is poor when the gear is processed, the whole spiral broach is required to be replaced if the gear is required to be replaced, the existing spiral broach is relatively expensive, the processing cost is high, and the device cannot be used for replacing the cutting edge at the damaged part independently.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a spiral broach, which has the advantages of strong practicability, good stability and solves the problem that the cutting edge of the damaged part cannot be replaced independently by the existing equipment.

The utility model provides the following technical scheme: the utility model provides a spiral broach, includes first dead lever, broach tool bit and short broach have been cup jointed respectively to the outer wall of first dead lever, fixed stock has been cup jointed to the outer wall at first dead lever both ends, the fixed orifices has all been seted up to the outer wall of first dead lever and fixed stock, first dead lever passes through screw threaded connection with fixed stock.

As a preferable technical scheme of the utility model, the number of the broach bits is two, the two broach bits are respectively sleeved at the two ends of the first fixed rod, and the positions of the broach bits are not more than the positions of the fixed holes.

As a preferable technical scheme of the utility model, the outer surface of the broach tool bit is provided with a short broach, and the outer wall of the short broach is provided with a spiral broach groove.

As a preferable technical scheme of the utility model, the outer wall of the spiral cutter groove is provided with a lubricating oil slope.

As a preferable technical scheme of the utility model, the outer walls of the two ends of the short broach are provided with the transverse holes, the four transverse holes are uniformly formed at equal intervals, the inner wall of each transverse hole is sleeved with the springs, and the springs are provided with the four transverse holes.

As a preferable technical scheme of the utility model, four fixing holes are uniformly formed in equal intervals, and four screws are arranged.

Compared with the prior art, the utility model has the following beneficial effects:

1. this spiral broach uses through the screw rod cooperation of first dead lever, broach tool bit, short broach, fixed stock, through installing broach tool bit and short broach on first dead lever, the rethread screw rod is fixed long pole and first dead lever with fixed stock, the fixed stock is fixed broach tool bit and short broach on first dead lever, when meetting the spiral sword groove of damage, take out the fixed stock through dismantling the screw rod, take out the short broach that will need change again, change it, and then solved current spiral broach and receive the damage to be difficult to repair and lead to changing whole spiral broach at the cutting edge, lead to the problem that processing cost grow. 2. This spiral broach uses through the cooperation of cross bore, spring, short broach, when needs change have impaired short broach, dismantles the screw rod and takes out fixed stock, and the spring that receives the pressure at this moment will release his elasticity, pops up a plurality of short broachs, makes a plurality of short broachs have certain gap between, is convenient for take out, takes out the short broach, changes impaired short broach can, and then has solved when changing because of not having the inconvenient problem of taking out of gap between the short broach.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model;

FIG. 2 is an enlarged schematic view of the structure of the utility model at A in FIG. 1;

FIG. 3 is a schematic perspective view of the present utility model;

FIG. 4 is a schematic view of the expanded structure of the present utility model;

fig. 5 is an enlarged schematic view of the structure of fig. 4 at B according to the present utility model. In the figure: 1. a first fixing rod; 2. broach tool bit; 3. a short broach; 4. a helical knife slot; 5. landslide; 6. fixing the long rod; 7. a fixing hole; 8. a screw; 9. a transverse hole; 10. and (3) a spring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, a spiral broach, the outer wall of a first fixing rod 1 is respectively sleeved with a broach bit 2 and a short broach 3, the spiral broach comprises a first fixing rod 1, the outer walls of two ends of the first fixing rod 1 are sleeved with a fixed long rod 6, the outer walls of the first fixing rod 1 and the fixed long rod 6 are provided with fixing holes 7, the first fixing rod 1 and the fixed long rod 6 are connected through screw threads 8, the fixed long rod 6 and the first fixing rod 1 are connected through screw threads 8, the screw threads 8 when the spiral broach is detached, at this time, the fixed long rod 6 and the first fixing rod 1 utilize the elasticity of a spring 10, so that the fixed long rod 6 and the first fixing rod 1 are separated, the broach bit 2 and the short broach 3 are more convenient when being replaced, the spiral broach bit is assembled and disassembled, and the convenience of the spiral broach is improved.

Wherein, the quantity of broach tool bit 2 is two, and two broach tool bits 2 cup joint respectively in the both ends of first dead lever 1, and the position of broach tool bit 2 does not surpass the position that fixed orifices 7 are located, utilizes the design of broach tool bit 2 for fixed orifices 7 have a certain distance with spiral sword groove 4, and the screw rod 8 of being convenient for when daily use and change can be avoided not hard up dropping and lead to spiral sword groove 4 to receive the damage, has improved the rationality of device.

The outer surface of the broach tool bit 2 is provided with the short broach 3, the outer wall of the short broach 3 is provided with the spiral broach groove 4, and the design of splicing a plurality of short broachs 3 into one rotary broach is utilized, so that when the spiral broach groove 4 on the short broach 3 is damaged, the short broach 3 is convenient to replace, the damaged short broach 3 is only needed to replace, the whole spiral broach is not needed to be replaced, and the cost of processing parts is greatly reduced.

The outer wall of the spiral broach groove 4 is provided with a lubricating oil slope 5, a certain resistance is generated when the spiral broach processes a part by utilizing the design of the lubricating oil slope 5, the resistance can lead to the spiral broach to process the part slowly and simultaneously generate certain heat, lubricating oil is adopted to lubricate the spiral broach and the part, and when the lubricating oil contacts with the lubricating oil slope 5, the lubricating oil slope 5 has a certain radian, so that the lubricating oil can flow into the spiral broach groove 4 more quickly to achieve the effects of lubrication and cooling.

Wherein, transverse holes 9 have been seted up to the outer wall at short broach 3 both ends, four have evenly been seted up to transverse holes 9 equidistance, spring 10 has been cup jointed to the inner wall in transverse holes 9, spring 10 is equipped with four, utilize the design of four springs 10 for when just changing impaired short broach 3 and broach tool bit 2, make the elasticity of these four springs 10 be greater than the elasticity of a spring 10, make the elasticity increase, make and pop open more easily between a plurality of short broachs 3, make and have certain distance between a plurality of short broachs 3, convenient to detach, the convenience of device has been improved.

Wherein, four have evenly been seted up to fixed orifices 7 equidistance, and screw rod 8 is equipped with four, utilizes the design of these four screw rods 8 for fixed stock 6 is more stable when fixed with first dead lever 1, and when one of them screw rod 8 was relaxed, three screw rod 8 played the fixed action in addition, made fixed stock 6 be difficult for dropping, improved the security of device.

The working principle is that when the screw broach is used, the screw broach is fixed on a machine, parts to be machined are machined, when the broach bit 2 and the screw broach groove 4 on the short broach 3 are damaged, the screw broach bit needs to be replaced, the fixed long rod 6 is pulled out of the first fixed rod 1 through the disassembling screw rod 8, at this time, the extrusion force exerted by the spring 10 in the short broach 3 is released, the short broachs 3 are sprung up, gaps are reserved between the short broachs 3, the operator is convenient to replace, the short broachs 3 are pulled out, the damaged short broach 3 is replaced, the short broach 3 is correspondingly assembled with the spring 10 when the replacement is completed, the fixed long rod 6 is connected with the first fixed rod 1, the distance between the short broach 3 is compressed by pressing the fixed long rod 6, and when the fixed hole 7 on the fixed long rod 6 corresponds to the fixed hole 7 on the first fixed rod 1, the fixed long rod 6 is fixed with the first fixed rod 1 through the four screw rods 8.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. Screw broach, including first dead lever (1), its characterized in that: the outer wall of the first fixed rod (1) is respectively sleeved with a broach tool bit (2) and a short broach (3), the outer walls of the two ends of the first fixed rod (1) are sleeved with a fixed long rod (6), the outer walls of the first fixed rod (1) and the fixed long rod (6) are provided with fixing holes (7), and the first fixed rod (1) is in threaded connection with the fixed long rod (6) through a screw (8).

2. A helical broach according to claim 1, wherein: the number of the broach tool bits (2) is two, the two broach tool bits (2) are respectively sleeved at two ends of the first fixing rod (1), and the positions of the broach tool bits (2) are not more than the positions of the fixing holes (7).

3. A helical broach according to claim 2, wherein: the outer surface of broach tool bit (2) is equipped with short broach (3), spiral sword groove (4) have been seted up to the outer wall of short broach (3).

4. A helical broach according to claim 3, wherein: the outer wall of the spiral cutter groove (4) is provided with a lubricating oil slope (5).

5. A helical broach according to claim 3, wherein: transverse holes (9) are formed in the outer walls of the two ends of the short broach (3), four transverse holes (9) are uniformly formed in equal intervals, springs (10) are sleeved on the inner walls of the transverse holes (9), and the springs (10) are four.

6. A helical broach according to claim 1, wherein: four fixing holes (7) are uniformly formed in an equidistant mode, and four screws (8) are arranged.