CN210498615U

CN210498615U - Timing dressing device for gear key groove of heavy gearbox intermediate shaft gear pair

Info

Publication number: CN210498615U
Application number: CN201921277967.9U
Authority: CN
Inventors: 王辉; 郭涛; 张国龙; 齐学春; 刘惠文; 高引军; 黄明月; 赵永平; 杨永举; 王永喜
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2019-08-08
Filing date: 2019-08-08
Publication date: 2020-05-12
Anticipated expiration: 2029-08-08

Abstract

The utility model discloses a heavy gearbox jackshaft gear is to tooth keyway trimming device in right time belongs to heavy gearbox gear and makes technical field to tooth keyway in right time, the utility model discloses can't continue processing to the unable direct condemned problem of keyway position degree and the size precision overproof that leads to thermal treatment deformation, the utility model provides a heavy gearbox jackshaft gear is to tooth keyway trimming device in right time combines current standard press, through positioning core axle, slider, bush, lead screw, supporting seat, handle, connecting plate, backup pad, briquetting, locating piece and the positioning fixture that presss from both sides tight piece and constitute, utilizes the pressure head of press to drive the push-cut processing of keyway push broach completion gear keyway and maintain, reduces or eliminates the waste product that thermal treatment deformation produced to reduce batch production's manufacturing cost.

Description

Timing dressing device for gear key groove of heavy gearbox intermediate shaft gear pair

Technical Field

The utility model belongs to the technical field of heavy gearbox gear makes in right time to tooth keyway, one set of trimming device in right time to the tooth in particular to.

Background

At present, the double-intermediate-shaft structure gearbox has the characteristics of strong bearing capacity, long service life, short axial dimension and suitability for the arrangement of the whole heavy truck, so the structure gearbox basically and completely occupies the domestic heavy truck market, one key technology in the double-intermediate-shaft structure gearbox is the precision control of the tooth alignment timing of an intermediate shaft gear, and the parameter is an important factor for determining the service life and the bearing capacity of the whole gearbox.

The tooth aligning timing of the intermediate shaft gear and the intermediate shaft is realized by connecting a flat key on a key groove of an inner hole of the gear with the intermediate shaft; aiming at the machining precision of the gear, the size precision and the position precision of a gear key groove (namely, the position precision of a certain tooth on the gear of the key groove pair is ensured to be within 0.05 mm) must be ensured, the machining precision is achieved, the tooth aligning timing precision between the intermediate shaft gear and the intermediate shaft can be ensured, and therefore the bearing function of the gearbox with the double-intermediate shaft structure is ensured to be realized.

According to the requirements of a product drawing, the whole machining of the gear key groove cannot be finished after heat treatment, otherwise, the crushing problem can be caused in the using process, so that the gear key groove can only be finished before heat treatment, after the heat treatment of the gear, the heat treatment deformation of an inner hole of the gear occurs, the key groove is subjected to distortion deformation along with the inner hole, multiple batch tests prove that the distortion deformation of the key groove is basically irregular and can not be preset before heat treatment, and the size and position accuracy of about 2 percent of the gear key groove exceeds the requirements of products and processes; the deformation of the key groove exceeds 50% of the process requirement, so that the gear generates flat key slippage in the assembly process, and the parts can not be scrapped for subsequent processing; the deformation of the key groove exceeds 30% of the process requirement, so that the gear surface is early abraded in the using process, the transmission failure is caused, the complaint of users is generated, and the reputation of the liberation vehicle is influenced.

Disclosure of Invention

To the problem, the utility model aims at providing one set of heavy gearbox jackshaft gear is to tooth keyway trimming device in right time. The technical scheme of the utility model is realized like this:

heavy gearbox jackshaft gear is to tooth keyway trimming device in right time mainly includes: the key groove push broach is used for pushing a key groove, the pressure head 1 is used for pushing a key groove push broach, the positioning core shaft 2 is used for pushing a slide block 3, the lining 4 is used for pushing a screw rod 5, the supporting seat 7 is used for supporting a handle 8, the connecting plate 9, the supporting plate 10, the pressing block 11, the positioning block 12 and the clamping block 13;

the machining device comprises a supporting plate 10, a sliding block 3, a positioning mandrel 2 and a key slot push broach, wherein the supporting plate 10 is fixed on a machine tool workbench through a connecting plate 9, the sliding block 3, the positioning mandrel 2 and the key slot push broach are arranged along the central line of the supporting plate 10, the sliding block 3 is installed on one side of the supporting plate 10, the positioning mandrel 2 is installed on the other side of the supporting plate, the positioning mandrel 2 is used for installing a gear to be machined, the key slot push broach is arranged in the key slot on the inner side of the gear to be machined, a double-tooth chuck is arranged on one side, facing the positioning mandrel 2, of the sliding block 3, the other side of the sliding block 3 is fixedly connected with the supporting plate 10 through a lead screw 5, the lead screw 5 is fixedly; the clamping block 13 is also wedge-shaped, is reversely mounted relative to the positioning block 12 and is fixedly mounted on the supporting seat 7 through a screw and a nut, the clamping block 13 is matched with the positioning block 12 to limit the left-right swing of the sliding block 3, and the clamping block 13 can adjust the extending distance of the clamping block 13 through the screw and the nut to control the advancing distance of the sliding block 3 so as to accurately control the angular positioning of the gear; the pressure head 1 is arranged above the key groove push broach and is driven by the pressure head 1 to complete the push cutting processing of the key groove of the gear.

The utility model has the advantages that:

the utility model discloses combine current standard press, can process the keyway position degree that leads to because of thermal treatment warp and the gear of size precision out of tolerance in batches, guarantee that the gear keyway machining precision after finishing accords with product drawing and technological requirement, reduce or eliminate the waste product that thermal treatment warp and produce to reduce batch production's manufacturing cost.

Drawings

Fig. 1 is a schematic side view of the tooth press-fitting device according to the present invention.

Fig. 2 is a top view of the tooth press-fitting device of the present invention;

fig. 3a and 3b are schematic views of the key slot push broach according to the present invention.

FIG. 4a is a schematic illustration of a countershaft gear;

fig. 4b and 4c are schematic views of a countershaft gear keyway.

Detailed Description

The following detailed description of the embodiments of the present invention refers to the accompanying drawings.

As shown in fig. 1 and fig. 2, the timing dressing device for the tooth keyways of the intermediate shaft gear pair of the heavy-duty gearbox mainly comprises: the key groove push broach is used for pushing a key groove, the pressure head 1 is used for pushing a key groove, the positioning core shaft 2 is used for pushing a slide block 3, the lining 4 is used for pushing a screw rod 5, the supporting seat 7 is used for pushing a handle 8, the connecting plate 9, the supporting plate 10, the pressing block 11, the positioning block 12 and the clamping block 13;

the machining device comprises a supporting plate 10, a sliding block 3, a positioning mandrel 2 and a key slot push broach, wherein the supporting plate 10 is fixed on a machine tool workbench through a connecting plate 9, the sliding block 3, the positioning mandrel 2 and the key slot push broach are arranged along the central line of the supporting plate 10, the sliding block 3 is installed on one side of the supporting plate 10, the positioning mandrel 2 is installed on the other side of the supporting plate, the positioning mandrel 2 is used for installing a gear to be machined, the key slot push broach is arranged in the key slot on the inner side of the gear to be machined, a double-tooth chuck is arranged on one side, facing the positioning mandrel 2, of the sliding block 3, the other side of the sliding block 3 is fixedly connected with the supporting plate 10 through a lead screw 5, the lead screw 5 is fixedly connected with the supporting plate 10 through; the clamping block 13 is also wedge-shaped, is reversely mounted relative to the positioning block 12 and is fixedly mounted on the supporting seat 7 through a screw and a nut, the clamping block 13 is matched with the positioning block 12 to limit the left-right swing of the sliding block 3, and the clamping block 13 can adjust the extending distance of the clamping block 13 through the screw and the nut to control the advancing distance of the sliding block 3 so as to accurately control the angular positioning of the gear; the pressure head 1 is arranged above the key groove push broach and is driven by the pressure head 1 to complete the push cutting processing of the key groove of the gear.

Firstly, gear key groove out-of-tolerance parts are grouped, the parts are distinguished according to size precision and position precision, different groups of cutters are selected according to the size precision and the position precision, a workpiece (such as a key groove with the size width of 9.40mm) with the largest key groove deformation needs to be processed by respectively using three groups of push cutters, the widths of the three groups of push cutters are sequentially 9.47mm, 9.53mm and 9.59mm, as shown in figure 1, a gear tooth pressing device is firstly installed on a press machine, the front and back and the left and right sides of the press machine are adjusted to be opposite to a press head of the machine tool, then the height of the press head of the machine tool is adjusted to be in a proper state according to the length of the cutters and the height of the positioning device, the deformed part is installed on the gear tooth pressing device through a positioning mandrel 2, in the installation process, the rough positioning of one. The key groove push broach is placed in a gear key groove, a machine tool is started, a machine tool pressure head moves downwards to push the push broach, the first-time push-cutting processing of parts is completed, the handle 12 is loosened, a workpiece is taken out, the processing of unqualified parts of other key grooves in batches is completed in sequence, after the whole batch of parts is completed, the processing of the second group of cutters and the third group of cutters is performed in sequence, and the finishing of all parts is completed in sequence.

Claims

1. Heavy gearbox jackshaft gear is to tooth keyway trimming device in right time, its characterized in that, the device mainly includes: the device comprises a key groove push broach, a pressure head (1), a positioning core shaft (2), a sliding block (3), a bushing (4), a screw rod (5), a supporting seat (7), a handle (8), a connecting plate (9), a supporting plate (10), a pressing block (11), a positioning block (12) and a clamping block (13);

the supporting plate (10) is fixed on a machine tool workbench through a connecting plate (9), the slide block (3), the positioning core shaft (2) and the key slot push broach are arranged along the central line of the supporting plate (10), one side of the supporting plate (10) is provided with a sliding block (3), the other side is provided with a positioning core shaft (2), the positioning mandrel (2) is used for installing a gear to be processed, a key slot push broach is arranged in a key slot at the inner side of the gear to be processed, one side of the sliding block (3) facing the positioning core shaft (2) is provided with a double-tooth chuck, the other side of the sliding block (3) passes through a screw rod (5) and a handle (8), the screw rod (5) is fixedly connected with the supporting plate (10) through a bushing (4), the pressing block (11) is connected with the supporting plate (10) through a screw and is positioned above the sliding block (3), the positioning block (12) is wedge-shaped and is fixedly arranged on two sides of the connecting plate (9) through screws; the clamping block (13) is also wedge-shaped, is reversely mounted relative to the positioning block (12), is fixedly mounted on the supporting seat (7) through a screw and a nut, the clamping block (13) is matched with the positioning block (12) to limit the left and right swinging of the sliding block (3), and the clamping block (13) can adjust the extending distance of the clamping block (13) through the screw and the nut to control the advancing distance of the sliding block (3) so as to accurately control the angular positioning of the gear; the pressure head (1) is arranged above the key groove push broach and is driven by the pressure head (1) to complete the push cutting processing of the key groove of the gear.