CN201739439U

CN201739439U - Anti-backlash speed reducer

Info

Publication number: CN201739439U
Application number: CN2010201896216U
Authority: CN
Inventors: 毛玉川; 周飞
Original assignee: CHANGZHOU CHANGLENG HEAVY CNC MACHINERY Co Ltd
Current assignee: CHANGZHOU CHANGLENG HEAVY CNC MACHINERY Co Ltd
Priority date: 2010-05-14
Filing date: 2010-05-14
Publication date: 2011-02-09
Anticipated expiration: 2020-05-14

Abstract

The utility model discloses an anti-backlash speed reducer for a gantry type boring and milling machine, and comprises a box body, wherein a transmission gear is installed and connected to an input shaft, and is in transmission connection with a first transition gear installed on the transitional shaft in a connecting manner; second transition gear and a third transition gear are also installed and connected to the transitional shaft; the second transition gear is in transmission connection with a first input gear installed on a first output shaft in a connecting manner; the third transition gear is in transmission connection with a second input gear installed on a second output shaft in a connecting manner; a first output gear and a second output gear are respectively arranged at output ends of the first output shaft and the second output shaft; the transmission gear, the first transition gear, the second transition gear, the third transition gear, the first input gear and the second input gear all adopt helical gears; a pin shaft is installed on an outer end of the transitional shaft in a connecting manner, and an anti-backlash spring is sleeved on the pin shaft; an end cover is fixed on the box body; and one end of the pin shaft extends out through a center hole of the end cover. The utility model can eliminate transmission clearance and improve the machining precision.

Description

The crack retarder disappears

Technical field

The utility model relates to a kind of crack retarder that disappears that is used for plane milling and boring machine.

Background technique

Moving pillar plane milling and boring machine is to use machining large equipment very widely, because stationary table is not moved on the ground, therefore it is unrestricted that worktable bears the weight of workpiece, still, and in order to guarantee machining accuracy, moving of crossbeam and two columns must be synchronously, therefore must adopt two retarders, and all adopt the spur gear transmission speed reducer usually, because always there is the gap in the spur gear transmission, therefore two columns is mobile always asynchronous, just causes machining accuracy inaccurate.

Summary of the invention

The purpose of this utility model is to provide a kind of crack retarder that disappears that can eliminate drive gap and improve machining accuracy.

In order to achieve the above object, the technical solution of the utility model is: a kind of crack retarder that disappears, comprise casing, has input shaft in the casing, transition axis, first output shaft and second output shaft, be fitted with driving gear on the input shaft, first transition gear of load is in transmission connection on driving gear and the transition axis, also be fitted with second transition gear and the 3rd transition gear on the transition axis, first of the load input gear transmission is connected on second transition gear and first output shaft, second of the load input gear transmission is connected on the 3rd transition gear and second output shaft, and the output terminal of first output shaft and second output shaft has first output gear and second output gear, described driving gear respectively, first transition gear, second transition gear, the 3rd transition gear, the first input gear, the second input gear is helical gear; The outer end of described transition axis is fitted with bearing pin, is set with anti-backlash on the bearing pin, is fixed with end cap on the casing, and an end of bearing pin stretches out from the center hole of end cap.

Have radially boss on the described bearing pin, radially the outside of boss has overhanging mounting end, is set with anti-backlash on the mounting end.

The two end part of described input shaft, transition axis, first output shaft and second output shaft all adopt thrust-bearing to install.

Described anti-backlash is dish-shaped anti-backlash.

After adopting said structure, owing to adopt first to be that driving gear, first transition gear, second transition gear, the 3rd transition gear, the first input gear, the second input gear are helical gear; The secondth, the outer end of described transition axis is fitted with bearing pin, is set with anti-backlash on the bearing pin, and end cap is fixed on the casing, and an end of bearing pin stretches out from the center hole of end cap; If the gap appears in transmission between the gear, so under the effect of anti-backlash, and by adopting helical gear to cooperate between the gear, reach the purpose of eliminating drive gap, thereby improved the transmission accuracy between the gear, made moving of two columns more synchronous, improved machining accuracy.

Description of drawings

Fig. 1 is that structure of the present utility model is launched cross-sectional schematic.

Embodiment

The embodiment who provides below in conjunction with accompanying drawing is described in further detail the utility model.

Referring to shown in Figure 1, a kind of crack retarder that disappears, comprise casing 1, has input shaft 2 in the casing 1, transition axis 4, first output shaft 8 and second output shaft 10, be fitted with driving gear 3 on the input shaft 2, first transition gear 5 of load is in transmission connection on driving gear 3 and the transition axis 4, also be fitted with second transition gear 6 and the 3rd transition gear 7 on the transition axis 4, first of the load input gear 9 is in transmission connection on second transition gear 6 and first output shaft 8, second of the load input gear 11 is in transmission connection on the 3rd transition gear 7 and second output shaft 10, and the output terminal of first output shaft 8 and second output shaft 10 has first output gear 12 and second output gear 13, described driving gear 3 respectively, first transition gear 5, second transition gear 6, the 3rd transition gear 7, the first input gear 9, the second input gear 11 is helical gear; The outer end of described transition axis 4 is fitted with bearing pin 16, is set with anti-backlash 14 on the bearing pin 16, is fixed with end cap 15 on the casing 1, and an end of bearing pin 16 stretches out from the center hole of end cap 15.

Referring to shown in Figure 1, in order to eliminate the gap between the gear transmission more, have radially boss 4-1 on the described bearing pin 16, radially the outside of boss 4-1 has overhanging mounting end 4-2, is set with anti-backlash 14 on the mounting end 4-2.

Referring to shown in Figure 1, in order to make stable drive, the two end part of described input shaft 2, transition axis 4, first output shaft 8 and second output shaft 9 all adopt thrust-bearing to install.

Referring to shown in Figure 1, in order to play the crack effect that disappears, described anti-backlash 14 is dish-shaped anti-backlash.

Referring to shown in Figure 1, when the utility model uses, input shaft 2 drives driving gear 3 and rotates, first transition gear, 5 engagements on driving gear 3 and the transition axis 4, thereby driving transition axis 4 rotates, be fixedly mounted on the first input gear, 9 engagements on second transition gear 6 on the transition axis 4 and

first output shaft

8,11 engagements of on the 3rd transition gear 7 and second output shaft 10 second input gear, therefore transition axis 4 drives

first output shaft

8 and 10 rotations of second output shaft, thereby first output shaft 8 drives first output gear 12 and rotates, second output shaft 10 drives second output gear 13 and rotates outputting power.

Claims

1. crack retarder that disappears, comprise casing (1), has input shaft (2) in the casing (1), transition axis (4), first output shaft (8) and second output shaft (10), be fitted with driving gear (3) on the input shaft (2), driving gear (3) is in transmission connection with first transition gear (5) that transition axis (4) is gone up load, also be fitted with second transition gear (6) and the 3rd transition gear (7) on the transition axis (4), second transition gear (6) is in transmission connection with the first input gear (9) that first output shaft (8) is gone up load, the 3rd transition gear (7) is in transmission connection with the second input gear (11) that second output shaft (10) is gone up load, and the output terminal of first output shaft (8) and second output shaft (10) has first output gear (12) and second output gear (13) respectively, it is characterized in that:

A, described driving gear (3), first transition gear (5), second transition gear (6), the 3rd transition gear (7), the first input gear (9), the second input gear (11) are helical gear;

The outer end of b, described transition axis (4) is fitted with bearing pin (16), is set with anti-backlash (14) on the bearing pin (16), is fixed with end cap (15) on the casing (1), and an end of bearing pin (16) stretches out from the center hole of end cap (15).

2. the crack retarder that disappears according to claim 1, it is characterized in that: have radially boss (16-1) on the described bearing pin (16), radially the outside of boss (16-1) has overhanging mounting end (16-2), is set with anti-backlash (14) on the mounting end (16-2).

3. the crack retarder that disappears according to claim 1 is characterized in that: the two end part of described input shaft (2), transition axis (4), first output shaft (8) and second output shaft (10) all adopt thrust-bearing to install.

4. the crack retarder that disappears according to claim 1 is characterized in that: described anti-backlash (14) is dish-shaped anti-backlash.