A high-precision gearbox structure of a high-speed gearbox

Abstract

The application discloses a high-precision box body structure of a high-speed gear box, which comprises a box body, a box cover and four independent bearing seats. The open top of the box body is matched with the box cover, four semicircular notches I are formed in the upper edge of the box body, the independent bearing seats are semicircular ring structures with downward openings, the four independent bearing seats are buckled on the four semicircular notches I respectively and fixed with the box body, and four round holes I for bearing installation are formed. Four semicircular notches II are formed in the lower edge of the box cover, the box cover is fixed on the upper port of the box body, the four semicircular notches II are buckled on the four independent bearing seats respectively, and the lower edge of the box cover is tightly combined with the upper edge of the box body. The box body structure of the application greatly improves the precision of the bearing hole, reduces the deformation requirement of the box cover under the premise of meeting the performance requirement of the high-speed gear box, improves the production efficiency, reduces the material waste and the loss of construction period, and improves the market competitiveness.

Description

TECHNICAL FIELD

[0001] The application relates to a high-precision box structure of a high-speed gear box. BACKGROUND

[0002] The box of the high-speed gear box is a split box structure, and is usually manufactured by casting or welding. The bottom plate and the wall of the box are thicker than the thickness of the cover of the box, and a plurality of reinforcing ribs can be arranged to improve the rigidity of the box, and the deformation of the box is small during heat treatment and machining. However, the cover of the box needs to be provided with temperature sensors and vibration sensors on the two sides of the input shaft and the output shaft due to the requirement of the function of the cover, reinforcing ribs cannot be arranged on the two sides of the cover due to the limitation of the structure, and the rigidity of the cover is poor, and the deformation of the cover is large during heat treatment and machining. However, the high-speed gear box has a relatively high requirement on the shape tolerance of the bearing hole of the box, and the precision directly determines whether the high-speed box can normally operate. Due to the poor rigidity of the cover, the bearing hole ellipticity and the coaxiality and parallelism between the bearing holes after machining of the bearing hole are out of tolerance, the blank must be re-manufactured, re-machined, and the yield is not high, a large period loss and material waste are caused, the machining cycle of the finished product is prolonged, and the competitiveness of the product is reduced.

[0003] Therefore, it is necessary to develop a box structure capable of improving the precision of the bearing hole of the box. SUMMARY

[0004] The application aims to provide a high-precision box structure of a high-speed gear box to solve the problems in the prior art.

[0005] The technical scheme adopted to achieve the object of the application is as follows: a high-precision box structure of a high-speed gear box, comprising a box, a cover, an independent bearing seat I, an independent bearing seat II, an independent bearing seat III and an independent bearing seat IV.

[0006] The open end of the box is matched with the cover, and four semicircular notches I are formed in the upper edge of the box.

[0007] The independent bearing seat I, the independent bearing seat II, the independent bearing seat III and the independent bearing seat IV are all semicircular ring structures with downward openings, the independent bearing seat I, the independent bearing seat II, the independent bearing seat III and the independent bearing seat IV are respectively buckled on the four semicircular notches I and fixed with the box, and four circular holes I for bearing installation are formed.

[0008] The lower edge of the cover is provided with four semicircular notches II, the cover is fixed on the upper end of the box, the four semicircular notches II are respectively buckled on the independent bearing seat I, the independent bearing seat II, the independent bearing seat III and the independent bearing seat IV, and the lower edge of the cover is tightly combined with the upper edge of the box.

[0009] Further, the upper end of the box is a rectangular opening, and two semicircular notches I are arranged on each long side of the rectangular opening, four semicircular notches I are respectively referred to as a first notch, a second notch, a third notch and a fourth notch, the centers of the first notch and the third notch coincide and the diameters are consistent, and the centers of the second notch and the fourth notch coincide and the diameters are consistent.

[0010] Further, the two ends of the independent bearing seat I, the independent bearing seat II, the independent bearing seat III and the independent bearing seat IV are connected with an ear plate, a pin hole and a bolt hole are arranged on each ear plate, and each ear plate is positioned and fixed on the box through an internal thread cylindrical pin and a connecting screw I.

[0011] Further, the box and the box cover are positioned and fixed on the box through a plurality of conical pins and a plurality of connecting screws II.

[0012] The technical effect of the present application is self-evident, the box of the present application greatly improves the precision of the bearing hole through the structure of the independent bearing seat, reduces the deformation requirement of the box cover under the premise of meeting the performance requirement of the high-speed gear box to the box, improves the generation efficiency, reduces the loss of material waste and construction period, improves the market competitiveness, has wide economic value and social value. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a whole structure diagram of the high-speed gear box;

[0014] Figure 2 It is a structure diagram of the box and the independent bearing seat;

[0015] Figure 3 It is a structure diagram of the independent bearing seat;

[0016] Figure 4 It is a sectional view of the high-speed gear box;

[0017] Figure 5 It is a schematic diagram of the transparent cover.

[0018] In the figure: the box 1, the box cover 2, the independent bearing seat I 3, the independent bearing seat II 4, the independent bearing seat III 5, the independent bearing seat IV 6, the internal thread cylindrical pin 7 and the conical pin 9. DETAILED DESCRIPTION

[0019] The present application will be further described below in conjunction with examples, but should not be understood as limiting the above-mentioned subject matter of the present application to the following examples. According to ordinary technical knowledge and conventional means in the art, various substitutions and modifications can be made without departing from the above-mentioned technical idea of the present application, and all should be included in the protection scope of the present application.

[0020] Example 1:

[0021] The embodiment discloses a high-precision box structure of a high-speed gear box, which comprises a box body 1, a box cover 2, an independent bearing seat I 3, an independent bearing seat II 4, an independent bearing seat III 5 and an independent bearing seat IV 6.

[0022] The upper end of the box body 1 is matched with the box cover 2, and four semicircular notches I are formed in the upper edge of the box body 1.

[0023] The upper end of the box body 1 is a rectangular opening, two semicircular notches I are arranged on each long side of the rectangular opening, the four semicircular notches I are respectively referred to as a first notch, a second notch, a third notch and a fourth notch, the centers of the first notch and the third notch coincide and the diameters are consistent, and the centers of the second notch and the fourth notch coincide and the diameters are consistent.

[0024] The independent bearing seat I 3, the independent bearing seat II 4, the independent bearing seat III 5 and the independent bearing seat IV 6 are all semicircular ring structures and the openings are downward, as shown in Figure 2 The independent bearing seat I 3, the independent bearing seat II 4, the independent bearing seat III 5 and the independent bearing seat IV 6 are respectively buckled on the four semicircular notches I and fixed with the box body 1, and four round holes I for bearing installation are formed.

[0025] As shown in Figure 3 Both ends of the independent bearing seat I 3, the independent bearing seat II 4, the independent bearing seat III 5 and the independent bearing seat IV 6 are connected with an ear plate, as shown in Figure 4 A pin hole and a bolt hole are formed in each ear plate, and each ear plate is positioned and fixed on the box body 1 through an internally threaded cylindrical pin 7 and a connecting screw I.

[0026] A lower edge of the box cover 2 is provided with four semicircular notches II, the box cover 2 is fixed on the upper end of the box body 1, the box body 1 and the box cover 2 are positioned and fixed on the box body 1 through a plurality of conical pins 9 and a plurality of connecting screws II, the four semicircular notches II are respectively buckled on the independent bearing seat I 3, the independent bearing seat II 4, the independent bearing seat III 5 and the independent bearing seat IV 6, and the lower edge of the box cover 2 is tightly combined with the upper edge of the box body 1.

[0027] During installation, bearings are installed on the independent bearing seat I 3, the independent bearing seat II 4, the independent bearing seat III 5 and the independent bearing seat IV 6, one end of an input shaft passes through the bearing of the independent bearing seat I 3 and is installed on the bearing of the independent bearing seat III 5, one end of an output shaft passes through the bearing of the independent bearing seat IV 6 and is installed on the bearing of the independent bearing seat II 4, the outer sides of the independent bearing seat II 4 and the independent bearing seat III 5 are installed with muff caps, and the outer sides of the independent bearing seat I 3 and the independent bearing seat IV 6 are installed with transparent covers, as shown in Figure 5 The transparent cover is provided with an oil collecting groove and a labyrinth sealing structure, a small amount of oil gas entering between the shaft and the transparent cover is ensured to enter the inside of the oil collecting groove and flow back to the box body through an oil passage at the lower part of the oil collecting groove under the action of the labyrinth sealing.

[0028] It is worth mentioning that the present embodiment mainly faces high-speed gear box, since the rotation speed of gears in high-speed box is high, some can reach tens of thousands of revolutions, the linear speed is large, some can reach 150 m / s or even higher, its operation requires very high machining precision of gears and box. The precision of gears is relatively easy to control, which can be obtained by optimizing control of machining and heat treatment, and then through dynamic balance test to obtain the parts meeting the precision. However, the box is a split structure, which is divided into lower box and upper box, and is positioned by pins on the joint surface of the box, and is fastened by connecting bolts; the lower box is fixed with the base by foundation bolts, and a plurality of reinforcing ribs can be arranged between the bearing seat and the bottom surface to improve the rigidity of the lower box, and the deformation of the box after heat treatment and finishing machining is small, which can be easily controlled within the required precision range. However, the upper box is not suitable for designing reinforcing ribs due to the arrangement of temperature sensors and vibration sensors, and its rigidity is relatively weaker than that of the lower box. After heat treatment and machining, the deformation is large, especially the deformation of the welded box is larger, and it is not easy to control the precision after heat treatment and machining. Due to the poor rigidity of the box cover, the bearing hole ovality and the coaxiality and parallelism between the bearing holes after machining will be out of tolerance, and the blank must be re-manufactured, re-machined, and the yield is not high, which causes great loss of construction period and waste of materials, prolongs the processing cycle of finished products, and reduces the competitiveness of products.

[0029] Therefore, through scientific and optimized design and reasonable arrangement, by improving the rigidity of the box and reducing the heat treatment and machining stress of the box, the deformation of the box is small, which becomes a research direction of high-speed gear box.

[0030] In the present embodiment, the box is designed as 4 independent bearing seats and 1 box cover structure, 4 semicircular holes are opened in the box cover, and 4 independent bearing seats are arranged in the circular holes and connected with the lower box. The box cover and the lower box are bonded at the non-bearing seat position to form a sealing surface; 4 independent bearing seats are combined and machined with 4 bearing holes on the lower box, the bearing bush is installed in each independent bearing seat, and each independent bearing seat is positioned by cylindrical pin and fastened and connected by bolt. Since the size of the independent bearing seat is small, the deformation after heat treatment and machining is small, and the shape and position tolerance of the bearing hole after machining can reach a high level, the positioning accuracy of the bearing bush is improved, and the overall transmission efficiency of the high-speed box is improved, the running noise is reduced, and the service life is prolonged; the purpose of the box cover is to form a bonding surface with the box to seal the internal lubricating oil, so the deformation of the box cover greatly reduces the influence on the precision of the transmission system, improves the yield of the box cover in actual machining process, and has good economic benefit and market value.

[0031] Embodiment 2:

[0032] The embodiment discloses a high-precision box structure of a high-speed gear box, which comprises a box body 1, a box cover 2, an independent bearing seat I 3, an independent bearing seat II 4, an independent bearing seat III 5 and an independent bearing seat IV 6.

[0033] The open upper end of the box body 1 is matched with the box cover 2, and four semicircular notches I are formed in the upper edge of the box body 1.

[0034] The independent bearing seat I 3, the independent bearing seat II 4, the independent bearing seat III 5 and the independent bearing seat IV 6 are all semicircular ring structures with downward openings, as shown in Figure 2 The independent bearing seat I 3, the independent bearing seat II 4, the independent bearing seat III 5 and the independent bearing seat IV 6 are respectively buckled on the four semicircular notches I and fixed with the box body 1, thereby forming four bearing mounting holes I.

[0035] The lower edge of the box cover 2 is provided with four semicircular notches II, the box cover 2 is fixed on the upper end of the box body 1, the four semicircular notches II are respectively buckled on the independent bearing seat I 3, the independent bearing seat II 4, the independent bearing seat III 5 and the independent bearing seat IV 6, and the lower edge of the box cover 2 is tightly combined with the upper edge of the box body 1.

[0036] The box structure disclosed by the embodiment adopts four independent bearing seats and a box to process four bearing holes, the independent bearing seats and the box have good rigidity, small deformation and high machining precision, and can meet the requirement of the high-speed gear box on the high-precision box. The problem that the box cover cannot be provided with reinforcing ribs due to the arrangement of temperature sensors and vibration sensors and has large heat treatment and machining deformation is well solved, the box cover only needs to form a sealing surface with the combined surface of the box to ensure that the lubricating oil does not leak. Since the box cover does not participate in the control of the bearing holes, the requirement on the box cover is greatly reduced, the yield of the box cover is improved, and the box cover has good economic value and market value.

[0037] Embodiment 3

[0038] The main structure of the embodiment is same as that of embodiment 2, and further, the upper end of the box body 1 is a rectangular opening, two semicircular notches I are arranged on each long side of the rectangular opening, the four semicircular notches I are respectively referred to as a first notch, a second notch, a third notch and a fourth notch, the centers of the first notch and the third notch coincide and have the same diameter, and the centers of the second notch and the fourth notch coincide and have the same diameter.

[0039] Embodiment 4

[0040] The main structure of the embodiment is same as that of embodiment 2, and further, as shown in Figure 3 Both ends of the independent bearing seat I 3, the independent bearing seat II 4, the independent bearing seat III 5 and the independent bearing seat IV 6 are connected with an ear plate, as shown in Figure 4A pin hole and a bolt hole are formed on each lug, and each lug is positioned and fixed on the box 1 by the internal thread cylindrical pin 7 and the connecting screw I.

[0041] Example 5

[0042] This example has the same main structure as example 2, and further, the box 1 and the cover 2 are positioned and fixed on the box 1 by the conical pins 9 and the connecting screws II.

Claims

1. A high-precision case structure of a high-speed gear case, characterized by: The box (1), the box cover (2), the independent bearing seat I (3), the independent bearing seat II (4), the independent bearing seat III (5) and the independent bearing seat IV (6) are included. The open upper end of the box (1) is matched with the box cover (2), and four semicircular notches I are formed in the upper edge of the box (1). The independent bearing seat I (3), the independent bearing seat II (4), the independent bearing seat III (5) and the independent bearing seat IV (6) are all semicircular ring structures with openings downward, and are respectively buckled on the four semicircular notches I and fixed with the box (1), forming four round holes I for bearing installation. The lower edge of the box cover (2) is provided with four semicircular notches II, the box cover (2) is fixed on the upper end of the box (1), the four semicircular notches II are respectively buckled on the independent bearing seat I (3), the independent bearing seat II (4), the independent bearing seat III (5) and the independent bearing seat IV (6), and the lower edge of the box cover (2) is tightly combined with the upper edge of the box (1).

2. A high precision gearbox structure of a high speed gearbox according to claim 1, characterized in that: The upper end of the box (1) is a rectangular opening, and two semicircular notches I are arranged on each long side of the rectangular opening, the four semicircular notches I are respectively marked as first notch, second notch, third notch and fourth notch, the centers of the first notch and the third notch coincide and the diameters are consistent, and the centers of the second notch and the fourth notch coincide and the diameters are consistent.

3. A high-precision gearbox structure of a high-speed gearbox according to claim 1 or 2, characterized in that: Both ends of the independent bearing seat I (3), the independent bearing seat II (4), the independent bearing seat III (5) and the independent bearing seat IV (6) are connected with the ear plates, the pin holes and the bolt holes are formed in each ear plate, and each ear plate is positioned and fixed on the box (1) through the internal thread cylindrical pin (7) and the connecting screw I.

4. A high-precision gearbox structure of a high-speed gearbox according to claim 1 or 2, characterized in that: The box (1) and the box cover (2) are positioned and fixed on the box (1) through the conical pins (9) and the connecting screws II.

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