CN112923035B - Transmission nut - Google Patents

Abstract

The invention discloses a transmission nut which comprises an outer shell and an embedded body, wherein a through hole is formed in the outer shell, the embedded body is fixedly embedded in the through hole of the outer shell, and a through screw hole is formed in the embedded body; the inner inlay and the outer shell are made of different materials. Compared with the prior art, the embedded transmission nut adopts the mode that the embedded body is embedded in the outer shell, so that the performance of materials can be fully utilized, and the quality and the cost of the transmission nut are balanced.

Description

a drive nut

technical field

The invention relates to the field of transmission components, in particular to a transmission nut.

Background technique

The screw nut mechanism is also called the screw transmission mechanism. It is mainly used to convert rotary motion to linear motion or to convert linear motion to rotary motion. There are those that mainly transmit energy (such as screw presses, jacks, etc.); there are also those that transmit motion, such as the feed screw of the machine tool table); there are also screw transmission mechanisms that adjust the relative position of parts.

The traditional transmission nut structure is made of the same material, such as steel for processing, but the steel material has disadvantages such as poor wear resistance and large movement resistance. However, the nut made of steel has better structural strength and can be well installed and connected with the mechanical parts on the machine. The use of copper materials to make nuts, although the wear resistance and motion resistance problems have been improved, the production cost of nuts has risen sharply, and the structural strength of copper materials is not as good as steel, so it will be difficult to lock copper nuts with mechanical parts. Increase.

In view of this, the applicant has conducted in-depth research on the above-mentioned defects in the prior art, resulting in this case.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a transmission nut, which has the characteristics of ensuring that the transmission nut has better structural strength, better wear resistance and lower movement resistance.

In order to achieve the above-mentioned purpose, the solution of the present invention is:

A transmission nut comprises an outer casing and an inlay, a through hole is formed in the outer casing, the inner inlay is fixedly embedded in the through hole of the outer casing, and a through hole is formed in the inner inlay provided screw holes; the material of the inner body is different from that of the outer shell.

Further, an inner thread is arranged in the through hole of the outer casing, an outer thread is arranged on the outer wall of the inner inlay, and the inner inlay and the outer casing are threadedly connected by the outer thread and the inner thread.

Further, a limit step is formed in the through hole of the outer shell, and one end of the inlay is abutted on the limit step.

Further, an end portion of the outer casing is formed with an abutment portion for abutting the inlay in the through hole, and the abutment portion is integrally connected to the outer casing and formed by spinning the end of the outer casing .

Further, a threaded section for fixing the outer casing is also formed on the outer wall of the outer casing.

Further, the inlay is made of self-lubricating material.

Further, the inlay is made of copper material.

Further, the inlay is made of polymer engineering plastics.

Further, the outer casing is made of steel material.

After adopting the above structure, a transmission nut involved in the present invention has at least the following beneficial effects:

1. The transmission nut is produced by passing the outer casing and the inner inlay. The outer casing and the inner inlay are made of different materials, so that the inner inlay can be made of wear-resistant and low-resistance materials. The outer layer is made of materials that are convenient for machining and have better structural strength. In this way, the two parts of the outer shell and the inner body make full use of the excellent properties of their respective materials, so that the improved transmission nut has better performance and lower cost.

2. External threads and internal threads are formed on the inner inlay and the outer shell, respectively, and the inner inlay and the outer shell are connected by threads, so that the inlay and the outer shell are connected with each other. The connection between them is stronger. Then, the inner inlay is firmly fixed on the outer casing through the abutment top formed by spinning on the outer casing.

3. The inlay is made of copper or polymer material, and is made of polymer material, which has self-lubricating properties and can greatly reduce the friction coefficient between the screw rod and the transmission nut.

Compared with the prior art, the present invention adopts the method of embedding an inlay in the outer casing, so that the transmission nut can fully utilize the properties of the material, so that the quality and cost of the transmission nut are balanced.

Description of drawings

Figure 1 is a schematic diagram of the three-dimensional structure of a finished nut.

Figure 2 is a schematic cross-sectional structure diagram of a finished nut.

FIG. 3 is a schematic three-dimensional structure diagram of a semi-finished nut.

FIG. 4 is a schematic diagram of the exploded structure of the outer casing and the inner body.

FIG. 5 is a schematic cross-sectional structure diagram of a semi-finished nut.

FIG. 6 is a schematic structural diagram of the semi-finished nut in the direction A in FIG. 5 .

FIG. 7 is a schematic cross-sectional structure diagram of a finished nut.

FIG. 8 is a schematic three-dimensional structure diagram of a spinning equipment.

FIG. 9 is a schematic side view of the structure of the spinning equipment.

FIG. 10 is a schematic top view of the spinning equipment.

In the picture:

Outer body 1; through hole 11; internal thread 111; thread segment 12; abutment top 13; limit step 14;

Inlay 2; External thread 21; Center hole 22; Drive hole 221; Screw hole 23;

Nut semi-finished product 3;

Nut finished product 4;

Spinning equipment 5; base 51; spindle box 511; rotary chuck 512; slide rail 513; mobile table 52; limit screw 521; first limit wheel 522; second limit wheel 523;

Spinning head 53; Hydraulic cylinder 54; Control button 541;

Drive screw 551; drive wheel 552; drive nut 553;

Limiting post 56; Limiting hole 561; Connecting plate 57; Lighting lamp 571.

Detailed ways

In order to further explain the technical solutions of the present invention, the present invention will be described in detail below through specific embodiments.

As shown in FIG. 1 to FIG. 10 , it is a drive nut related to the present invention, comprising an outer casing 1 and an inlay 2 . A through hole 11 is formed in the outer casing 1 , and the inlay 2 It is fixedly embedded in the through hole 11 of the outer casing 1 , and a screw hole 23 is formed in the inner inlay 2 ; the material of the inner inlay 2 and the outer casing 1 is different.

In this way, the transmission nut involved in the present invention is produced by passing the transmission nut through two parts of the outer casing 1 and the inner inlay 2, and the outer casing 1 and the inner inlay 2 are produced by using different materials, so that The inner inlay 2 can be made of materials with wear-resistant and low resistance properties, and the outer layer is made of materials that are convenient for machining and have better structural strength. In this way, the two parts of the outer casing 1 and the inner body 2 make full use of the excellent properties of their respective materials, so that the improved transmission nut has better performance and lower cost.

Preferably, the through hole 11 of the outer casing 1 is provided with an inner thread 111 , the outer wall of the inner inlay 2 is provided with an outer thread 21 , and the inner inlay 2 and the outer casing 1 pass through the outer thread 21 Threaded connection with internal thread 111. External threads 21 and internal threads 111 are formed on the inner inlay 2 and the outer casing 1 respectively, and the inner inlay 2 and the outer casing 1 are connected by threads, so that the inner inlay 2 and The connection between the outer casings 1 is more firm.

Preferably, a limiting step 14 is formed in the through hole 11 of the outer casing 1 , and one end of the inlay 2 abuts on the limiting step 14 . Further, an end portion of the outer casing 1 is formed with an abutment portion 13 for abutting the inlay 2 in the through hole 11 , and the abutment portion 13 is integrally connected to the outer casing 1 and is formed by the outer casing. The ends of 1 are formed by spinning. Then, the inner body 2 is firmly fixed on the outer casing 1 through the abutment top 13 formed by spinning on the outer casing 1 . The abutting portion 13 cooperates with the limiting step 14 to firmly fix the inlay 2 in the through hole 11 of the outer casing 1 .

Preferably, a threaded segment 12 for fixing the outer casing 1 is further formed on the outer wall of the outer casing 1 . In this way, the mechanical components connected with the outer casing 1 of the transmission nut, such as a worktable that needs to move with the transmission nut, can be connected through the flange of the threaded section 12 locked on the outer casing 1 .

Preferably, the inlay 2 is made of self-lubricating material. The self-lubricating material can be one of a metal (based) self-lubricating material, a non-metallic (based) self-lubricating material or a polymer (based) self-lubricating material that meets the structural requirements of the screw nut. Preferably, the inlay 2 is made of copper material or the inlay 2 is made of polymer engineering plastics. It is made of polymer material, which has self-lubricating properties and can greatly reduce the friction coefficient between the screw rod and the transmission nut.

Preferably, the outer casing 1 is made of steel material. The steel material makes the outer casing 1 have high mechanical strength, which is convenient for machining operations such as punching and tapping, and facilitates the connection between the outer casing 1 and the mechanical parts. Preferably, the outer casing can also be made of other materials that meet the strength requirements.

A kind of transmission nut that the present invention relates to adopts the following production technology to make, comprises the following steps:

① Prepare the outer casing 1 and the inner inlay 2, the outer casing 1 and the inner inlay 2 are made of different materials; the outer casing 1 is formed with a through hole 11;

②Fix the inner inlay 2 in the through hole 11 of the outer shell 1 to form the nut semi-finished product 3;

③ Shape the screw hole 23 in the inner inlay 2 for matching with the screw rod; machine the outer shell 1 to form the finished nut 4 .

In this way, the nut is produced by passing through two parts of the outer casing 1 and the inner inlay 2, and the outer casing 1 and the inner inlay 2 are made of different materials, so that the inner inlay 2 can be made of wear-resistant, low-cost It is made of materials with resistance properties, and the outer layer is made of materials that are easy to machine and have better structural strength. In this way, the two parts of the outer shell 1 and the inner body 2 make full use of the excellent properties of their respective materials, so that the improved nut has better performance and lower cost.

Preferably, in step ①, when preparing the outer casing 1, an inner thread 111 is formed in the through hole 11 of the outer casing 1; when preparing the inner inlay 2, an outer thread 21 is formed on the outer wall of the inner inlay 2; the nut In the semi-finished product 3, the inner body 2 and the outer shell 1 are connected by threads. By forming the outer thread 21 on the outer casing 1 in advance and forming the inner thread 111 on the inner inlay 2, the outer casing 1 and the inner inlay 2 can be connected by threads, so that the inner thread 2 and the inlay 2 can be connected by thread. The positional relationship of the outer casing 1 is preliminarily defined. Further, the end of the outer casing 1 is formed by spinning the end of the outer casing 1 to form the abutment top 13 by the spinning device 5 , thus restricting the movement of the inner body 2 along the axial direction. In this way, the inner body 2 is firmly fixed in the outer casing 1 .

Preferably, the outer casing 1 is made of steel, and the inlay 2 is made of polymer plastic material or copper material.

Preferably, a center hole 22 is formed on the inlay 2 in step ①, and a driving hole 221 for driving the inlay 2 to rotate is formed on the upper edge of the center hole 22; the center hole 22 is used in step ③ For machining the screw holes 23. The end of the central hole 22 is provided with a driving hole 221 , and the inner inlay 2 can be easily driven to rotate relative to the outer casing 1 through the rotating chuck 512 matched with the driving hole 221 , so as to realize the inner The inlay 2 is connected with the thread of the outer casing 1 . Preferably, the maximum distance between the edge of the driving hole 221 and the central hole 22 is smaller than the small diameter of the formed screw hole 23 . The driving hole 221 on the central hole 22 can be removed when the screw hole 23 on the inlay 2 is formed.

Preferably, step ② also includes spinning the end of the outer casing 1 by using a spinning device 5 and forming abutting tops 13 on the ends of the outer casings 1 , and the abutting tops 13 abut the inner body 2 . Embedded in the outer casing 1 . In this way, the abutment portion 13 formed by spinning further abuts the inner body 2 and the outer shell 1 during the spinning process. The outer casing 1 is in close contact with each other, thus forming an integrated structure, and there is no relative movement between the inner inlay 2 and the outer casing 1 .

Preferably, the spinning equipment 5 includes a base 51 , a spindle box 511 , a spin chuck 512 , a moving table 52 , a spinning head 53 and an abutting mechanism, the spindle box 511 is connected to the base 51 , and the The rotary chuck 512 is rotatably connected to the spindle box 511; the base 51 is provided with a slide rail 513, and the mobile stage 52 is slidably arranged on the slide rail 513; the base 51 is provided with a drive to drive the mobile stage 52 moving transverse drive mechanism; the abutting mechanism is installed on the moving table 52, and the spinning head 53 is arranged on the abutting mechanism;

In use, the outer shell 1 of the semi-finished nut 3 is fixedly mounted on the rotary chuck 512 for rotation, and the spinning head 53 and the abutting mechanism approach the nut as the moving table 52 progresses. Semi-finished product 3 ; the end of the outer casing 1 away from the rotating chuck 512 is spun by the spinning head 53 with the abutting mechanism to form the abutting top 13 . The position of the moving table 52 on the slide rail 513 can be easily adjusted by the lateral movement mechanism, and the relative position between the spinning head 53 and the outer casing 1 can be adjusted. Pressing, the spinning head 53 is in abutting contact with the end of the outer casing 1 , so as to complete the spinning action to form the abutting top 13 .

Preferably, the abutting mechanism includes a hydraulic cylinder 54 , and a control button 541 for controlling the expansion and contraction of the hydraulic cylinder 54 is further provided on the spindle box 511 . The extension or retraction of the hydraulic cylinder 54 is controlled by pressing the control button 541 . The control buttons 541 include an extension button, a retraction button and an emergency stop button.

Preferably, during spinning, the rotation direction of the outer casing 1 driven by the rotary chuck 512 is opposite to the tightening direction of the thread of the inlay 2 on the outer casing 1 . In this way, when the rotating chuck 512 drives the outer casing 1 to rotate, the inner body 2 will have a tendency to rotate in the tightening direction due to inertia, so as to prevent the inner body 2 from loosening. Moreover, when the spinning head 53 spins the outer casing 1 , the spinning force of the spinning head 53 will also generate a force in the tightening direction on the inlay 2 , so that the connection between the inlay 2 and the outer casing 1 is more stable.

Preferably, the lateral drive mechanism includes a drive screw 551 rotatably arranged on the base 51 ; the drive screw 551 is arranged in parallel with the slide rail 513 ; the bottom of the moving table 52 is provided with a screw connection with the drive screw 551 The end of the drive screw 551 is also provided with a drive wheel 552. When in use, the driving screw 551 is driven to rotate by manually rotating the driving wheel 552 in the forward direction or in the reverse direction. Thus, the moving stage 52 can move along the sliding rail 513 .

Preferably, a limit screw 521 is fixedly connected to the moving table 52, and the limit screw 521 is arranged in parallel with the slide rail 513; a limit column 56 is arranged on the base 51, and a limit column 56 is arranged on A limit hole 561 through which the limit screw 521 passes; a first limit wheel 522 and a second limit wheel are respectively threaded on the limit screws 521 on both sides of the limit hole 561 Wheel 523. In this way, by adjusting the positions of the first limit wheel 522 and the second limit wheel 523 on the limit screw 521, the moving range of the mobile table 52 on the slide rail 513 can be limited, so as to prevent workers from moving Operation errors cause the spinning head 53 to accidentally touch the spin chuck 512 and an accident occurs.

Preferably, a connecting plate 57 is connected to the upper end of the headstock 511 and the limiting column 56 , and a lighting lamp 571 is provided on the connecting plate 57 . The lighting lamp 571 is provided with a universal support lamp tube, and workers can observe the operation situation through the edge of the lighting lamp 571 to ensure production safety.

Compared with the prior art, the present invention adopts the method of embedding an inlay 2 in the outer casing 1, so that the transmission nut can fully utilize the performance of the material, so that the quality and cost of the transmission nut are balanced.

The above-mentioned embodiments and drawings do not limit the product form and style of the present invention, and any appropriate changes or modifications made by those of ordinary skill in the art should be regarded as not departing from the scope of the present invention.

Claims (6)

1. a production process of a drive nut, characterized in that it comprises an outer casing and an inlay, a through hole is formed in the outer casing, and the inlay is fixedly embedded in the through hole of the outer casing , a screw hole is formed in the inlay; the material of the inlay is different from that of the outer shell; An inner thread is arranged in the through hole of the outer casing, an outer thread is arranged on the outer wall of the inner inlay, and the inner inlay and the outer casing are threadedly connected with the inner thread through the outer thread; A limit step is formed in the through hole of the outer shell, and one end of the inlay is abutted on the limit step; The abutment top is integrally connected to the outer casing and is formed by spinning the end of the outer casing; The transmission nut is produced by the following production process, including the following steps: ① Prepare the outer casing and the inner inlay, the outer casing and the inner inlay are made of different materials; through holes are formed in the outer casing; ②Fix the inlay in the through hole of the outer shell to form a semi-finished nut; in the semi-finished nut, the inlay and the outer shell are connected by threads; ③Molding the screw holes in the inner inlay for matching with the screw rod; machining the outer shell to form the finished nut; Step 2 also includes using spinning equipment to spin the end of the outer casing, and forming an abutting top on the end of the outer casing, and the abutting top tightly embeds the inlay in the outer casing; The spinning equipment includes a base, a spindle box, a spin chuck, a moving table, a spinning head and a top-down mechanism, the spindle box is connected to the base, and the spin chuck is rotatably connected to the spindle box; The base is provided with a slide rail, and the mobile platform is slidably arranged on the slide rail; the base is provided with a transverse drive mechanism for driving the mobile platform to move; the abutting mechanism is installed on the mobile platform , the spinning head is arranged on the abutting mechanism; The outer shell of the nut semi-finished product is fixedly mounted on the rotary chuck for rotation, and the spinning head and the abutting mechanism approach the nut semi-finished product as the moving table progresses; The mechanism spins the spinning head away from the end of the outer casing away from the rotating chuck to form the top; During spinning, the rotation direction of the outer casing driven by the rotary chuck is opposite to the tightening direction of the thread of the inner inlay on the outer casing. 2 . The production process of a transmission nut according to claim 1 , wherein a thread segment for fixing the outer casing is further formed on the outer wall of the outer casing. 3 . 3 . The production process of a drive nut according to claim 1 , wherein the inlay is made of self-lubricating material. 4 . 4 . The production process of a drive nut according to claim 1 , wherein the inlay is made of copper material. 5 . 5 . The production process of a transmission nut according to claim 1 , wherein the inlay is made of polymer engineering plastics. 6 . 6 . The production process of a transmission nut according to claim 1 , wherein the outer casing is made of a steel material. 7 .

Images