阅读说明：本技术 一种控制刮齿机刀具轴交角的二次锁紧装置 (Secondary locking device for controlling intersection angle of cutter shaft of gear scraping machine ) 是由 吴震宇 王思明 詹明儒 于 2019-09-04 设计创作，主要内容包括：本发明公开了一种控制刮齿机刀具轴交角的二次锁紧装置,包括机座、刀具转盘、蜗轮、蜗杆和旋转电机,所述刀具转盘和蜗轮同轴固定在一起并通过转动副安装在机座上,所述蜗杆与蜗轮啮合安装,蜗杆与旋转电机动力传动相连,所述刀具转盘上用于安装刀具,旋转电机通过蜗轮蜗杆结构驱动刀具转盘旋转,从而完成刀具轴交角的调整,所述刀具转盘上设有与其同轴固定的刹车盘,所述机座上设有能与刹车盘接触的刹车片,所述刹车片通过锁紧装置安装在机座上,利用锁紧装置调节刹车片与刹车盘之间的距离,从而完成刹车锁紧或者释放功能。本装置既能便于调节刀具的轴交角,又能快速锁定调整好的轴交角,大大提高了刮齿机的加工精度和加工范围。(The invention discloses a secondary locking device for controlling the crossing angle of a cutter shaft of a gear scraping machine, which comprises a machine base, a cutter turntable, a worm wheel, a worm and a rotating motor, wherein the cutter turntable and the worm wheel are coaxially fixed together and are arranged on the machine base through a revolute pair, the worm is meshed with the worm wheel, the worm is in power transmission connection with the rotating motor, the cutter turntable is used for mounting a cutter, the rotating motor drives the cutter turntable to rotate through a worm and gear structure so as to complete the adjustment of the crossing angle of the cutter shaft, a brake disc coaxially fixed with the cutter turntable is arranged on the cutter turntable, a brake pad capable of being in contact with the brake disc is arranged on the machine base, the brake pad is arranged on the machine base through a locking device, and the locking device is used for adjusting the distance between the brake pad and the brake disc so as to complete. The device can be used for conveniently adjusting the shaft angle of the cutter and quickly locking the adjusted shaft angle, and greatly improves the processing precision and the processing range of the gear scraping machine.)

1. The utility model provides a control secondary locking device of gear scraping machine cutter shaft angle of intersect, includes frame, cutter carousel, worm wheel, worm and rotating electrical machines, cutter carousel and worm wheel coaxial fixation are in the same place and install on the frame through the revolute pair, worm and worm wheel meshing installation, the worm links to each other with rotating electrical machines power transmission, be used for the installation cutter on the cutter carousel, the rotating electrical machines passes through the rotation of worm gear structure drive cutter carousel to accomplish the adjustment of cutter shaft angle of intersect, its characterized in that: the cutter turntable is provided with a brake disc coaxially fixed with the cutter turntable, the base is provided with a brake pad capable of contacting with the brake disc, the brake pad is installed on the base through a locking device, and the locking device is used for adjusting the distance between the brake pad and the brake disc, so that the function of locking or releasing the brake is achieved.

2. The secondary locking device of claim 1, wherein: the brake disc is provided with a circle of annular brake grooves, the brake grooves are T-shaped sections with small openings and large openings, and the brake pads are installed in the brake grooves and are installed on the locking device through push rods.

3. The secondary locking device of claim 2, further comprising: the locking device comprises a cylinder and a piston arranged in the cylinder, one end of the push rod is fixedly connected with the brake pad, the other end of the push rod is connected with the piston, and the piston drives the brake pad at the end part of the push rod to move in the brake groove through compressed gas to complete brake locking or releasing.

4. A secondary locking device as claimed in claim 3, wherein: the middle part of the piston is provided with a mounting hole, the push rod penetrates through the mounting hole of the piston and then is limited and locked through the thrust nut, a locking spring is arranged between the piston and the air cylinder on one side of the piston close to the brake disc, under the normal condition, the piston is pushed outwards by the locking spring, the piston drives the brake pad to move outwards through the thrust nut, the inner side of the brake pad is in contact with the inner surface of the brake groove of the brake disc, and the piston has pressing force under the action of the locking spring to complete the locking and stopping functions of the brake disc.

5. The secondary locking device of claim 4, wherein: the brake block has a plurality ofly, and a plurality of brake block equipartitions are in brake disc brake inslot all around, and every brake block all corresponds and is equipped with a locking device.

Technical Field

The invention belongs to the field of machinery, relates to a gear scraping machine, and particularly relates to a secondary locking device for controlling a tool shaft intersection angle of the gear scraping machine.

Background

The gear scraping process is an advanced gear machining technology with high speed and high precision. In the process of gear scraping machining, an axis crossing angle, namely an included angle between a cutter main shaft and a workpiece main shaft, has an important influence on the machining precision of the gear. Therefore, in order to ensure the accuracy of the gears, the skew angle must be strictly controlled. At present, scrape the gear machine and be the axis crossing angle through motor drive worm gear control cutter, nevertheless under the heavy load operating mode, only rely on the locking force of motor self can not satisfy the requirement of the accurate control of axis crossing angle, and in the course of working, the axis crossing angle can produce undulantly, and then influences gear machining precision. Therefore, the invention adds a set of locking device capable of accurately positioning the intersecting angle on the basis of the existing mechanism, and realizes the loosening and locking of the cutter turntable through pneumatic control according to the friction principle.

Disclosure of Invention

The invention aims to solve the problem that the precision of a processed finished product is poor due to the change of a tool shaft angle caused by heavy load and the like in the processing process of the conventional gear scraping machine, and provides a locking device consisting of a cylinder, a piston, a push rod, a disc spring, a thrust nut and a brake disc. The brake disc and the cutter turntable connected with the brake disc are locked by friction force between the push rod and the brake disc through pneumatic control.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the utility model provides a control secondary locking device of gear scraping machine cutter shaft angle of intersect, includes frame, cutter carousel, worm wheel, worm and rotating electrical machines, cutter carousel and worm wheel coaxial fixation are in the same place and install on the frame through the revolute pair, worm and worm wheel meshing installation, the worm links to each other with rotating electrical machines power transmission, be used for the installation cutter on the cutter carousel, the rotating electrical machines passes through the rotation of worm gear structure drive cutter carousel to accomplish the adjustment of cutter shaft angle of intersect, its characterized in that: the cutter turntable is provided with a brake disc coaxially fixed with the cutter turntable, the base is provided with a brake pad capable of contacting with the brake disc, the brake pad is installed on the base through a locking device, and the locking device is used for adjusting the distance between the brake pad and the brake disc, so that the function of locking or releasing the brake is achieved.

As the improvement, be equipped with the annular brake groove of round on the brake disc, the brake groove is the big T type cross-section in the mouth is little, the brake block is installed in the brake groove and is installed on locking device through the push rod.

As an improvement, the locking device comprises a cylinder and a piston arranged in the cylinder, one end of the push rod is fixedly connected with the brake pad, the other end of the push rod is connected with the piston, and the piston drives the brake pad at the end part of the push rod to move in the brake groove through compressed gas to complete brake locking or releasing.

As an improvement, the middle part of the piston is provided with a mounting hole, the push rod penetrates through the mounting hole of the piston and then is limited and locked through a thrust nut, a locking spring is arranged between the piston and the air cylinder on one side of the piston, which is close to the brake disc, under the normal condition, the locking spring pushes the piston outwards, the piston drives the brake pad to move outwards through the thrust nut, the inner side of the brake pad is in contact with the inner surface of the brake groove of the brake disc, and the inner side of the brake pad has pressing force under the action of the locking spring, so that the locking and stopping functions of the brake.

As the improvement, the brake block has a plurality ofly, and a plurality of brake blocks equipartition are in brake groove all around the brake disc, and every brake block all corresponds and is equipped with a locking device.

The gear scraping machine realizes the adjustment of the shaft intersection angle through the rotation of the cutter turntable, the cutter turntable is connected with the worm wheel, and the rotation action of the cutter turntable is realized through the transmission mode that the motor drives the worm wheel and the worm. When the shaft intersection angle reaches a set value, the position of the shaft intersection angle can be locked by turning off the motor, which is a commonly used mode at present. However, under heavy load or impact load, the external load applied to the tool rotary table cannot be offset by the locking force of the motor, so that the tool rotary table deflects, the intersection angle of the shafts changes, and the machining precision of the gear is reduced. According to the invention, a set of secondary locking device is added on the basis of the original mechanism, the action of the push rod is realized through pneumatic control, and when the brake pad is directly contacted with the brake disc, a certain friction force is generated between the brake disc and the brake pad, so that the action of the brake disc is limited by the friction force. According to the principle, the brake disc is connected with the worm wheel and the cutter turntable through the bolts, when the intersection angle of the shaft needs to be adjusted, the brake block and the brake disc are loosened through pneumatic control, and then the locking state can be released; and then the motor is started, and the rotation of the cutter turntable is realized through the transmission of the worm gear and the worm. When the rotating angle of the cutter rotating disc reaches a set value, the motor is turned off, then the brake pad is pushed to be in direct contact with the brake disc through pneumatic control, friction force is generated, the friction force limits the movement of the brake disc, and the brake disc is connected with the worm wheel and the cutter rotating disc, so that the movement of the brake disc is limited, the movement of the cutter rotating disc is correspondingly limited, and the aim of locking the cutter rotating disc is fulfilled.

The invention has the beneficial effects that:

the invention can effectively lock the cutter turntable, not only is convenient for adjusting the intersection angle of the cutter shaft, but also can accurately lock the intersection angle of the shaft after the intersection angle of the shaft is adjusted, thereby preventing the intersection angle of the shaft from changing, and greatly improving the processing precision of the gear scraping machine and the processing adaptability to internal teeth of different sizes.

Drawings

Fig. 1 is a structural view of a secondary lock device of the present invention.

Fig. 2 is a partially enlarged schematic view a of fig. 1.

1-tool rotating disc, 2-worm wheel, 3-brake disc, 4-piston, 5-push rod, 6-disc spring, 7-thrust nut, 8-brake groove, 9-brake block, 10-tool apron, 11-bearing, 12-cylinder cover, 13-machine base, 14-locking device and 15-worm.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1 and fig. 2, a secondary locking device for controlling the intersecting angle of the cutter shaft of a gear scraping machine comprises a base 13, a cutter turntable 1, a worm wheel 2, a worm 15 and a rotating motor, wherein the cutter turntable 1 is coaxially fixed with the worm wheel 2 through a bolt, the cutter turntable 1 is installed on the base 13 through a bearing 11, the worm 15 is installed on the base 13 through the bearing 11 and is meshed with the worm wheel, the worm 15 is in power transmission connection with the rotating motor, the rotating motor is installed on the base 13 through a motor base (not shown in the figure), the cutter turntable 1 is provided with a cutter holder 10 for installing a cutter, the rotating motor drives the cutter turntable 1 to rotate through the structure of the worm wheel 2 and the worm 15, so as to complete the adjustment of the intersecting angle of the cutter shaft, the cutter turntable 1 is provided with a brake disc 3 coaxially fixed with the cutter turntable 1, the base 13 is provided with a brake pad 9, the brake block 9 is arranged on the base 13 through a locking device 14, and the locking device 14 is used for adjusting the distance between the brake block 9 and the brake disc 3, so that the brake locking or releasing function is completed.

As shown in fig. 2, a ring of annular brake grooves 8 are arranged on the brake disc 3, the brake grooves 8 have a T-shaped cross section with a small opening and a large inside, the brake pad 9 is arranged in the brake groove 8 and is arranged on a locking device 14 through a push rod 5, the locking device 14 comprises a cylinder and a piston 4 arranged in the cylinder, one end of the push rod 5 is fixedly connected with the brake pad 9, the other end of the push rod is connected with the piston 4, a mounting hole is arranged in the middle of the piston 4, the right end of the push rod 5 passes through the mounting hole of the piston 4 and is limited and locked through a thrust nut 7, a locking spring is arranged between the piston 4 and the cylinder at one side close to the brake disc 3, the piston 4 is pushed outwards by the locking spring under normal conditions, the piston 4 drives the brake pad 9 to move outwards through the thrust nut 7, the right side surface of the brake pad 9 contacts with the inner surface of the brake groove 8 of the brake disc 3, and, and the locking and stopping functions of the brake disc 3 are completed.

A plurality of brake block 9 equipartitions are in brake groove 8 around brake disc 3, and every brake block 9 all corresponds and is equipped with a locking device 14, is equipped with 6 brake blocks 9 on the cutter carousel 1 in this embodiment, but actually is not limited to this quantity, selects according to actual need.

In the embodiment, the cylinder is composed of an opening on the base body and a cylinder cover 12, a sliding seal is arranged between the push rod 5 and the mounting hole, the push rod 5 extends out of the mounting hole and extends to the outside of the cylinder cover 12, an air chamber is arranged between the right side surface of the piston 4 and the cylinder cover 12, an air hole communicated with the air chamber is arranged on the cylinder cover 12, when the intersection angle of a shaft needs to be adjusted, high-pressure air is supplied to the air chamber, namely, the piston 4 is pushed to move leftwards to compress a locking spring, and meanwhile, the piston 4 is separated from a thrust nut 7 arranged on the push rod 5, so that the push rod 5 is not subjected to the spring force exerted by the locking spring, the positive pressure on the contact surface of the right side surface of the brake pad 9 and the brake disc 3 is zero, the friction force is also zero. At this time, the rotating motor is started, and the rotation of the tool turntable 1 can be driven by the transmission mode of the worm 15 and the worm wheel 2, that is, the intersection angle of the tool is adjusted.

When the cutter turntable 1 is adjusted to a designated position, the rotating motor is turned off, the worm wheel 2 stops rotating, and the cutter turntable 1 stops rotating along with the worm wheel. At this time, the compressed air is cut off, and the piston 4 moves rightward by the elastic force of the locking spring to push the thrust nut 7 mounted on the push rod 5. Because the thrust nut 7 is in threaded connection with the push rod 5, the thrust nut 7 and the push rod 5 move rightwards under the action of thrust until the right side face of the brake pad 9 at the left end of the push rod 5 is in contact with the brake disc 3. At this time, a certain positive pressure is generated at the contact surface of the brake pad 9 and the brake disc 3, so that a frictional force exists between the brake pad 9 and the brake disc 3, and the frictional force can restrict the rotation of the brake disc 3. Because the cutter turntable 1, the worm wheel 2 and the brake disc 3 are connected through the bolts to form a component, the rotation of the brake disc 3 is limited, the rotation of the cutter turntable 1 can be simultaneously limited, and the locking function of the cutter turntable 1 can be realized.

In the implementation, the locking spring is a disc spring 6, the brake pad 9 and the push rod 5 are integrally manufactured to form a T-shaped rod-shaped structural member, and when the locking mechanism is locked, the right side surface of the brake pad 9 is in positive pressure pretightening force contact with the right side vertical surface of the brake groove 8 under the action of the locking spring to generate strong static friction force, so that the locking function of the tool rotary table 1 is completed.