CN114060471B - Transmission gapless transmission gearbox - Google Patents

Abstract

The present invention discloses a transmission gearbox with no gap, wherein a first input shaft is rotatably connected in a housing, a first helical gear is arranged on the first input shaft, and a gear gap adjusting member is arranged on the left side of the first input shaft; the gear gap adjusting member comprises a rotating shaft rotatably connected to the housing, a second helical gear is fixed on the rotating shaft, and a compression spring is arranged on the side end of the rotating shaft for the tooth surface of the second helical gear to be pressed against the tooth surface of the first helical gear along the axial direction of the rotating shaft; a force transmission shaft rod rotatably connected in the housing is arranged on the right side of the first input shaft, a third helical gear is fixed on the force transmission shaft rod, a first output shaft rotatably connected to the housing is arranged on the side of the force transmission shaft rod, a fourth helical gear is fixed on the first output shaft, and a fifth helical gear meshing with the fourth helical gear is fixed on the force transmission shaft rod. The structural design of the present invention is ingenious and reasonable, and can achieve gapless transmission and no jitter between the gears of the gearbox, and can achieve high processing precision for high-precision and cutting-edge products, and is worthy of popularization and application.

Description

A transmission gearbox with no transmission gap

Technical Field

The invention relates to a gearbox, in particular to a gapless transmission gearbox.

Background technique

The gearbox is an independent component consisting of a gear drive, a worm drive, or a gear-worm drive enclosed in a rigid housing. It is often used as a reduction transmission device between the prime mover and the working machine. It matches the speed and transmits torque between the prime mover and the working machine or actuator, and is widely used in modern machinery.

Due to the limitations of processing accuracy and assembly accuracy, traditional gearboxes have tiny gaps between gears, which will cause operating errors during operation (such as running high-precision equipment for mobile processing). At the same time, due to the generation of gaps, the transmission itself will also vibrate during operation, which has a great impact on the processing accuracy of high-precision equipment, resulting in an increase in the defective rate, which is not conducive to the production and processing of high-precision and cutting-edge products.

Summary of the invention

The present invention aims to solve the above-mentioned shortcomings of the prior art and provide a transmission gearbox capable of gapless transmission, which meets the requirements of no gap between transmission gears of the gearbox and high processing accuracy of high-precision and advanced products.

The present invention adopts a technical solution to solve its technical problems: this transmission gapless transmission gearbox includes a shell, a first input shaft is rotatably connected in the shell, a first helical gear is fixed on the first input shaft, and a gear clearance adjustment member is provided on the left side of the first input shaft; the gear clearance adjustment member includes a rotating shaft rotatably connected in the shell and capable of axial movement, a second helical gear meshing with the first helical gear is fixed on the rotating shaft, and a compression spring is provided on the side end of the rotating shaft for pressing the tooth surface of the second helical gear against the tooth surface of the first helical gear along the axial direction of the rotating shaft; a force transmission shaft rotatably connected in the shell is provided on the right side of the first input shaft, a third helical gear meshing with the first helical gear is fixed on the force transmission shaft, and a first output shaft rotatably connected to the shell is provided on the side of the force transmission shaft, a fourth helical gear is fixed on the first output shaft, and a fifth helical gear meshing with the fourth helical gear is fixed on the force transmission shaft. The function of the first input shaft here is to apply torque through the first input shaft, and the function of the first bevel gear here is to act on the force-applying gear, and the force transmission shaft, the third bevel gear, and the fifth bevel gear can be used to perform speed transmission under high load, and the torque can be output by using the first output shaft and the fourth bevel gear; the function of the gear clearance adjustment part here is to enable the inclined tooth surface of the second bevel gear to be pressed against the inclined tooth surface of the first bevel gear, so that there is no gap in the transmission between the second bevel gear and the first bevel gear, and the inclined pressing force can be transmitted to the third bevel gear, thereby causing the force transmission shaft to be slightly deformed, so that there is no gap between the fifth bevel gear and the fourth bevel gear.

To further improve, the side end of the rotating shaft is provided with a first supporting sleeve fixed on the shell, and the side end of the rotating shaft is provided with a first plane needle bearing, the inner ring of the first plane needle bearing is tightly fitted with the side end of the rotating shaft, the outer ring of the first plane needle bearing is inserted in the shell, and the side end of the rotating shaft is inserted into the first supporting sleeve; the other end of the rotating shaft is provided with a second supporting sleeve fixed, an inner liner is inserted in the second supporting sleeve, a storage groove is opened on the inner side of the inner liner, a spring mounting hole is opened on the outer side of the inner liner, the compression spring is installed between the end face of the spring mounting hole and the end face of the second supporting sleeve, and the other side end of the rotating shaft is provided with a second plane needle bearing, the inner ring of the second plane needle bearing is tightly fitted with the other side end of the rotating shaft, the outer ring of the second plane needle bearing is inserted in the shell, a thrust bearing is placed on the storage groove, and the other side end of the rotating shaft is installed on the thrust bearing. The function of the first plane needle bearing and the second plane needle bearing here is to support the rotation of the rotating shaft under high load; the function of the inner liner tube and the spring mounting hole here is to use the pressure spring to push the inner liner tube to drive the entire rotating shaft to move, so that the inclined tooth surface of the second bevel gear is pressed against the inclined tooth surface of the first bevel gear, so that there is no gap in the transmission between the second bevel gear and the first bevel gear, and the inclined pressing force can be transmitted to the third bevel gear, so that the force transmission shaft is slightly deformed, so that there is no gap between the fifth bevel gear and the fourth bevel gear; the function of the thrust bearing here is to transmit the compressive force of the pressure spring to the rotating shaft through the thrust bearing, so that when the rotating shaft rotates, it can not only rotate but also be subjected to the axial thrust of the rotating shaft, and the friction resistance of the rotating shaft is extremely small.

Further improvement, the inner liner is provided with a through cut, wherein the through cut is used to facilitate the gapless plug-in fit of the inner liner in the second supporting sleeve.

Further improvement, the fourth helical gear has the same module and number of teeth as the fifth helical gear, the second helical gear has the same module and number of teeth as the third helical gear, the fifth helical gear has the same module as the third helical gear and the gear ratio is 20:43, and the first helical gear has the same module as the second helical gear and the gear ratio is 16:43. The role of the same module and number of teeth as the fourth helical gear and the fifth helical gear is to facilitate tight installation. The small first helical gear is used to drive the large third helical gear and the fifth helical gear coaxial with the third helical gear is used to drive the fourth helical gear at the first output shaft, thereby driving the first output shaft to rotate, and then the low torque required by the first input shaft can drive the first output shaft to output high torque.

Further improvement, the third helical gear and the second helical gear are respectively pressed on the force transmission shaft and the rotating shaft by the expansion sleeve. The function of the expansion sleeve here is to facilitate the installation of the third helical gear on the force transmission shaft, to facilitate the installation accuracy adjustment and tightening of the third helical gear, to facilitate the installation of the second helical gear on the rotating shaft, to facilitate the installation accuracy adjustment and tightening of the second helical gear; the expansion sleeve (abbreviated as expansion sleeve) is an advanced basic component widely used in the world for mechanical connection under heavy loads. In the connection between wheels and shafts, it is a keyless connection device that realizes load transmission by tightening high-strength bolts to generate pressure and friction between the containing surfaces.

Further improvement, the outer end of the first output shaft is installed with a pair of symmetrically arranged first tapered roller bearings, the inner end of the first input shaft is installed with a pair of symmetrically arranged second tapered roller bearings, and the inner side of the force transmission shaft is installed with a pair of symmetrically arranged third tapered roller bearings. Here, the first tapered roller bearing can carry out high-load rotational force on the first output shaft, not only counterclockwise rotation or clockwise rotation, can use the first tapered roller bearing to be able to bear force well and stably, and also has the function of automatic axis correction, here, the second tapered roller bearing can carry out high-load rotational force on the first input shaft, not only counterclockwise rotation or clockwise rotation, can use the second tapered roller bearing to be able to bear force well and stably, and also has the function of automatic axis correction, here, the third tapered roller bearing can carry out high-load rotational force on the force transmission shaft, not only counterclockwise rotation or clockwise rotation, can use the third tapered roller bearing to be able to bear force well and stably, and also has the function of automatic axis correction.

The beneficial effects of the present invention are as follows: the structural design of the present invention is ingenious and reasonable, the first input shaft can be used to apply torque, the first bevel gear can be used to act on the force gear, the force transmission shaft, the third bevel gear, and the fifth bevel gear can be used to perform speed transmission of force under high load, the transmission ratio of the third bevel gear is greater than that of the first bevel gear, the first output shaft and the fourth bevel gear can be used to output torque, the gear clearance adjustment part can be used to make the inclined tooth surface of the second bevel gear pressed on the inclined tooth surface of the first bevel gear, so that there is no gap in force transmission between the second bevel gear and the first bevel gear, and the inclined pressing force can be transmitted to the third bevel gear, thereby making the force transmission shaft slightly deformed, so that there is no gap between the fifth bevel gear and the fourth bevel gear, the structural design of the present invention is ingenious and reasonable, can make the output shaft end of the gearbox transmit without gap and without jitter, can have high processing accuracy for high, precise and cutting-edge products, and is worthy of popularization and application.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a perspective view of the present invention;

FIG2 is a perspective view of the present invention without the housing;

FIG3 is a second perspective view of the present invention without the housing;

FIG4 is a third perspective view of the present invention with the housing and the second supporting sleeve removed;

FIG5 is a perspective view of the present invention without the housing;

FIG6 is a perspective view of the present invention without the housing;

FIG. 7 is a stereoscopic view of the inner liner tube of the present invention.

Explanation of the accompanying drawings: housing 1, first input shaft 2, first bevel gear 2-1, gear clearance adjustment member 3, rotating shaft 3-1, second bevel gear 3-2, compression spring 3-3, first support sleeve 3-4, first plane needle roller bearing 3-5, second support sleeve 3-6, inner liner tube 3-7, storage groove 3-7a, spring mounting hole 3-7b, through cut 3-7c, second plane needle roller bearing 3-8, thrust bearing 3-9, force transmission shaft 4, third bevel gear 4-1, fifth bevel gear 4-2, first output shaft 5, fourth bevel gear 5-1, expansion sleeve 6, first tapered roller bearing 7, second tapered roller bearing 8, third tapered roller bearing 9.

Detailed ways

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

Referring to the accompanying drawings: This transmission gapless transmission gearbox includes a housing 1, in which a first input shaft 2 is rotatably connected, a first bevel gear 2-1 is fixed on the first input shaft 2, and a gear clearance adjustment member 3 is provided on the left side of the first input shaft 2; the gear clearance adjustment member 3 includes a rotating shaft 3-1 rotatably connected in the housing 1 and capable of axial movement, a second bevel gear 3-2 meshing with the first bevel gear 2-1 is fixed on the rotating shaft 3-1, and a compression spring 3-3 is provided at the side end of the rotating shaft 3-1 for the tooth surface of the second bevel gear 3-2 to be axially pressed against the tooth surface of the first bevel gear 2-1 along the rotating shaft 3-1; a force transmission shaft 4 rotatably connected in the housing 1 is provided on the right side of the first input shaft 2, a third bevel gear 4-1 meshing with the first bevel gear 2-1 is fixed on the force transmission shaft 4, and a first output shaft 5 rotatably connected to the housing 1 is provided on the side of the force transmission shaft 4, a fourth bevel gear 5-1 is fixed on the first output shaft 5, and a fifth bevel gear 4-2 meshing with the fourth bevel gear 5-1 is fixed on the force transmission shaft 4.

The side end of the rotating shaft 3-1 is provided with a first supporting sleeve 3-4 fixed on the shell 1, and the side end of the rotating shaft 3-1 is provided with a first plane needle roller bearing 3-5, the inner ring of the first plane needle roller bearing 3-5 is tightly fitted with the side end of the rotating shaft 3-1, the outer ring of the first plane needle roller bearing 3-5 is plugged into the shell 1, and the side end of the rotating shaft 3-1 is plugged into the first supporting sleeve 3-4; the other end of the rotating shaft 3-1 is provided with a second supporting sleeve 3-6 fixed thereon, and an inner liner 3-7 is inserted into the second supporting sleeve 3-6, and a placement is opened on the inner side of the inner liner 3-7 Groove 3-7a, a spring mounting hole 3-7b is opened on the outer side of the inner lining tube 3-7, the compression spring 3-3 is installed between the end face of the spring mounting hole 3-7b and the end face of the second supporting sleeve 3-6, and the other side end of the rotating shaft 3-1 is provided with a second plane needle roller bearing 3-8, the inner ring of the second plane needle roller bearing 3-8 is tightly fitted with the other side end of the rotating shaft 3-1, the outer ring of the second plane needle roller bearing 3-8 is inserted in the housing 1, and a thrust bearing 3-9 is placed in the placement groove 3-7a, and the other side end of the rotating shaft 3-1 is installed on the thrust bearing 3-9.

The inner liner tube 3-7 is provided with a through cut 3-7c.

The fourth bevel gear 5-1 has the same module and number of teeth as the fifth bevel gear 4-2, the second bevel gear 3-2 has the same module and number of teeth as the third bevel gear 4-1, the fifth bevel gear 4-2 has the same module as the third bevel gear 4-1 and the tooth ratio is 20:43, the first bevel gear 2-1 has the same module as the second bevel gear 3-2 and the tooth ratio is 16:43.

The third bevel gear 4 - 1 and the second bevel gear 3 - 2 are respectively pressed against the force transmission shaft 4 and the rotating shaft 3 - 1 through the expansion sleeve 6 .

A pair of symmetrically arranged first tapered roller bearings 7 are installed at the outer end of the first output shaft 5, a pair of symmetrically arranged second tapered roller bearings 8 are installed at the inner end of the first input shaft 2, and a pair of symmetrically arranged third tapered roller bearings 9 are installed on the inner side of the power transmission shaft 4.

The working principle of the present invention is as follows: in the housing 1, the compression spring 3-3 presses the inner liner tube 3-7 to move at the second support sleeve 3-6 and makes the inner liner tube 3-7 pressed against the thrust bearing 3-8, thereby making the rotating shaft 3-1 move, and then making the inclined tooth surface of the second bevel gear 3-2 pressed against the inclined tooth surface of the first bevel gear 2-1, so that there is no gap in the transmission between the second bevel gear 3-2 and the first bevel gear 2-1, and the inclined pressing force can be transmitted to the third bevel gear 4-1 through the first bevel gear 2-1, thereby making the force transmission shaft 4 slightly deformed, thereby driving the fifth bevel gear 4-2 fixed on the force transmission shaft 4 and the fourth bevel gear 5-1 to have no transmission gap, so that when power is input to the first input shaft 2 and power is output to the first output shaft 5, the power transmission is error-free and jitter-free, which is particularly suitable for high-precision machining in a high-repeat positioning motion environment; the structural design of the present invention is ingenious and reasonable, which can make the bevel gears in the gearbox have no gap in transmission and can process higher-precision workpieces, and the gearbox has no gap and thus no jitter during operation, which is more conducive to the machining of high-precision workpieces and is worthy of popularization and application.

Although the invention has been shown and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims (3)

1. A transmission gapless transmission gearbox, comprising a housing (1), characterized in that: a first input shaft (2) is rotatably connected inside the housing (1), a first helical gear (2-1) is fixed on the first input shaft (2), and a gear gap adjustment member (3) is provided on the left side of the first input shaft (2); The gear clearance adjustment member (3) comprises a rotating shaft (3-1) rotatably connected in the housing (1) and capable of axial movement, a second helical gear (3-2) meshing with the first helical gear (2-1) being fixed on the rotating shaft (3-1), and a compression spring (3-3) for axially pressing the tooth surface of the second helical gear (3-2) against the tooth surface of the first helical gear (2-1) along the rotating shaft (3-1) is provided at a side end of the rotating shaft (3-1); A force transmission shaft (4) rotatably connected to the housing (1) is provided on the right side of the first input shaft (2), a third helical gear (4-1) meshing with the first helical gear (2-1) is fixed on the force transmission shaft (4), a first output shaft (5) rotatably connected to the housing (1) is provided on the side of the force transmission shaft (4), a fourth helical gear (5-1) is fixed on the first output shaft (5), and a fifth helical gear (4-2) meshing with the fourth helical gear (5-1) is fixed on the force transmission shaft (4); The side end of the rotating shaft (3-1) is provided with a first supporting sleeve (3-4) fixed on the housing (1); the side end of the rotating shaft (3-1) is provided with a first plane needle roller bearing (3-5); the inner ring of the first plane needle roller bearing (3-5) is tightly fitted with the side end of the rotating shaft (3-1); the outer ring of the first plane needle roller bearing (3-5) is plugged into the housing (1); the side end of the rotating shaft (3-1) is plugged into the first supporting sleeve (3-4); the other end of the rotating shaft (3-1) is provided with a second supporting sleeve (3-6) fixed thereto; an inner liner tube (3-7) is plugged into the second supporting sleeve (3-6); a shelf is provided on the inner side of the inner liner tube (3-7). A placing groove (3-7a), a spring mounting hole (3-7b) is formed on the outer side of the inner lining tube (3-7), the compression spring (3-3) is mounted between the end surface of the spring mounting hole (3-7b) and the end surface of the second supporting sleeve (3-6), the other side end of the rotating shaft (3-1) is provided with a second plane needle roller bearing (3-8), the inner ring of the second plane needle roller bearing (3-8) is tightly fitted with the other side end of the rotating shaft (3-1), the outer ring of the second plane needle roller bearing (3-8) is plugged into the housing (1), a thrust bearing (3-9) is placed at the placing groove (3-7a), and the other side end of the rotating shaft (3-1) is mounted on the thrust bearing (3-9); The third bevel gear (4-1) and the second bevel gear (3-2) are respectively pressed onto the force transmission shaft (4) and the rotating shaft (3-1) via a tightening sleeve (6); A pair of symmetrically arranged first tapered roller bearings (7) are mounted on the outer end of the first output shaft (5), a pair of symmetrically arranged second tapered roller bearings (8) are mounted on the inner end of the first input shaft (2), and a pair of symmetrically arranged third tapered roller bearings (9) are mounted on the inner side of the force transmission shaft (4). 2. A transmission gapless transmission gearbox according to claim 1, characterized in that: a through cut (3-7c) is opened on the inner lining tube (3-7). 3. A transmission gapless transmission gearbox according to claim 1, characterized in that: the fourth bevel gear (5-1) has the same module and number of teeth as the fifth bevel gear (4-2), the second bevel gear (3-2) has the same module and number of teeth as the third bevel gear (4-1), the fifth bevel gear (4-2) has the same module as the third bevel gear (4-1) and the gear ratio is 20:43, the first bevel gear (2-1) has the same module as the second bevel gear (3-2) and the gear ratio is 16:43.