Front drive axle structure for electric fork

Abstract

The utility model discloses a front drive axle structure for an electric fork, which comprises a left axle housing and a right axle housing which are mutually pressed and fixed, a differential mechanism is arranged in the right axle housing, a left differential mechanism shell of the differential mechanism is movably connected in the left axle housing through a bearing, and a right differential mechanism shell of the differential mechanism is movably connected in the right axle housing through a bearing. Half shafts are connected to the middles of two half shaft gears of the differential mechanism through splines, and the half shafts are inserted into middle through holes of a left axle shaft which is fixed to the left axle housing and extends outwards or inserted into middle through holes of a right axle shaft which is fixed to the right axle housing and extends outwards. The mounting position of the driving motor is parallel to the differential mechanism, so that the driving motor and the differential mechanism are horizontally arranged, the overall front-back width is greatly reduced, the occupied space between the front portion and the back portion of a chassis of a corresponding vehicle is reduced, space arrangement of other components of the chassis of the vehicle is facilitated, and the use effect is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to drive axle technical field more specifically relates to a kind of front drive axle structure for electric fork. BACKGROUND

[0002] At present, the front drive axle of cross-country fork truck is equipped with differential, and half shaft is installed on both sides, as shown in Figure 1 Input shaft is generally perpendicular to the middle part of differential, and the rear end of input shaft needs to be connected with the output end of connecting shaft and transmission box;

[0003] If this structure is used in electric fork truck, the input shaft is directly installed with driving motor, which makes driving motor need to be vertically arranged with front drive axle, which greatly increases the length of space occupied between front and rear of front drive axle and driving motor, and affects the space arrangement of vehicle chassis. UTILITY MODEL CONTENTS

[0004] The utility model discloses a kind of front drive axle structures for electric fork, it is installed with driving motor position and differential parallel arrangement, so that driving motor is horizontally arranged with differential, so that the width between front and rear of whole is greatly reduced, so as to reduce the space occupation between front and rear of corresponding vehicle chassis, facilitate the space arrangement of other components of vehicle chassis, and use effect is good.

[0005] The utility model solves the technical problem of the scheme:

[0006] A kind of front drive axle structure for electric fork, including mutually pressing fixed left axle housing and right axle housing, differential is installed in the right axle housing, the left differential shell of differential is movably connected in left axle housing by bearing, the right differential shell of differential is movably connected in right axle housing by bearing, the middle part of two half shaft gears of differential is connected with half shaft by spline, and half shaft is inserted in the middle part through hole of fixed left axle housing outward extending left axle shaft or the middle part through hole of fixed right axle housing outward extending right axle shaft;

[0007] The left rear wall surface of the right axle housing is formed with a rear extension extending rearward, and a speed reduction cavity is formed between the rear extension and the rear part of the left axle housing, the double gear shaft is movably connected between the inner wall surface of the rear extension and the inner wall surface of the rear part of the left axle housing through bearings at both ends of the double gear shaft, the double gear shaft is formed with a pinion and a large gear connected through splines, the speed reduction cavity at the rear of the double gear shaft is installed with a front axle input shaft, both ends of the front axle input shaft are movably connected between the inner wall surface of the rear extension and the inner wall surface of the rear part of the left axle housing through bearings, the outer side wall of the front axle input shaft is formed with an input gear, the input gear is engaged with the large gear, the pinion is engaged with a fixed gear ring on the left differential housing, and the right end of the front axle input shaft is inserted into the through hole formed in the wall plate of the rear extension.

[0008] The middle part of the front axle input shaft is formed with an axial through hole, the right inner side wall of the axial through hole is formed with a spline groove, and the left end of the axial through hole is clamped with a sealing cover.

[0009] The prominent effect of the utility model is:

[0010] Compared with the prior art, the driving motor installation position is parallel to the differential, so that the driving motor and the differential are horizontally arranged, thereby greatly reducing the width between the front and the rear of the whole, reducing the space occupation between the front and the rear of the chassis of the corresponding vehicle, facilitating the space arrangement of other components of the vehicle chassis, and having good use effect. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a partial structure schematic view of the prior front drive axle;

[0012] Figure 2 is a partial structure schematic view of the utility model;

[0013] Figure 3 is a partial sectional view of the utility model;

[0014] Figure 4 is Figure 3 a partial enlarged view of

[0015] Figure 5 is Figure 3 a partial enlarged view of another part of DETAILED DESCRIPTION

[0016] Embodiment, see as Figures 2 to 5As shown, a front drive axle structure for electric fork includes a left axle housing 1 and a right axle housing 2 fixed against each other, a differential 30 is installed in the right axle housing 2, a left differential housing 31 of the differential 30 is movably connected in the left axle housing 1 through a bearing, a right differential housing 32 of the differential 30 is movably connected in the right axle housing 2 through a bearing, the middle part of the two half axle gears 33 of the differential 30 is connected with a half axle 40 through a spline, the half axle 40 is inserted into the middle part through hole of the outwardly extending left axle shaft 3 fixed on the left axle housing 1 or the middle part through hole of the outwardly extending right axle shaft 4 fixed on the right axle housing 2;

[0017] The left rear wall surface of the right axle housing 2 is formed with a rear extension 21 extending rearward, the rear extension 21 and the rear part of the left axle housing 1 form a deceleration cavity, the double gear shaft 5 is in the deceleration cavity, the left and right ends of the double gear shaft 5 are movably connected between the inner wall surface of the rear extension 21 and the rear inner wall surface of the left axle housing 1 through bearings, the double gear shaft 5 is formed with a pinion gear part 51 and a large gear part 52 connected through a spline, a front axle input shaft 6 is installed in the deceleration cavity at the rear of the double gear shaft 5, the two ends of the front axle input shaft 6 are movably connected between the inner wall surface of the rear extension 21 and the rear inner wall surface of the left axle housing 1 through bearings, the outer side wall of the front axle input shaft 6 is formed with an input gear part 61, the input gear part 61 is engaged with the large gear part 52, the pinion gear part 51 is engaged with the ring gear 34 fixed on the left differential housing 31 (the differential 30 used in this embodiment is basically the same as the limited slip differential of Chinese patent application No. 201621216247.8, only the left end of the left differential housing 31 extends leftward and is fixed with the ring gear 34, and the ring gear 34 faces the deceleration cavity, so it is not described in detail), the right end of the front axle input shaft 6 is inserted into the through hole formed in the wall plate of the rear extension 21.

[0018] Further, the middle part of the front axle input shaft 6 is formed with an axial through hole, the right inner side wall of the axial through hole is formed with a spline groove, and the left end of the axial through hole is clamped with a sealing cover.

[0019] Further, the outer side wall of the left axle shaft 3 and the right axle shaft 4 is sleeved with an outer axle arm 7, the outer axle arm 7 is fixed on the outer end surface of the left axle housing 1 or the right axle housing 2, and the outer side wall of the left axle shaft 3 and the right axle shaft 4 is tightly attached to the inner side wall of the middle axial through hole of the corresponding outer axle arm 7.

[0020] Further, the outer end of the outer axle arm 7 is fixed with a brake assembly 8.

[0021] Further, the outer side wall of the left axle shaft 3 and the right axle shaft 4 at the outer end is movably connected with a connecting hub 9 through a bearing.

[0022] Further, the inner end of the connecting hub 9 is fixedly connected with a brake hub 91 through a bolt, and the brake hub 91 cooperates with the corresponding brake assembly 8.

[0023] Further, the outer end of the connecting hub 9 is fixedly connected with a planetary carrier 92 through a bolt, the outer end of the half shaft 40 is formed with an output shaft part 41, the output shaft part 41 is inserted into the planetary carrier 92, the outer side wall of the output shaft part 41 is formed with an outer tooth part, the outer end of the output shaft part 41 is movably arranged on the outer end plate of the planetary carrier 92 through a bearing, the planetary gear 93 is movably connected with the planetary gear shaft fixed on the outer end plate of the planetary carrier 92 through a needle bearing (bearing), the planetary gear 93 is engaged with the outer tooth part of the output shaft part 41, the planetary carrier 92 is inserted with the planetary gear ring 94, the planetary gear 93 is engaged with the planetary gear ring 94, the outer end face of the left axle 3 and the right axle 4 is fixed with the gear ring support 36, the outer side wall of the gear ring support 36 is formed with an outer tooth part, the outer tooth part is inserted into the tooth groove of the inner tooth part at the inner end of the planetary gear ring 94 and is matched with the tooth groove, the inner side wall of the planetary gear ring 94 at the left and right sides of the gear ring support 36 is clamped with the snap spring, and the gear ring support 36 is between the two snap springs.

[0024] The front drive motor is fixedly arranged on the right side wall of the rear extension part 21 in the embodiment, the input shaft of the front drive motor is inserted into the axial through hole formed in the middle part of the front axle input shaft 6, the axial through hole is a spline shaft, the spline shaft is matched with the spline groove formed on the right inner side wall, transmission is realized, the front drive motor is arranged transversely, the left axle housing 1 and the right axle housing 2 are arranged in parallel, the distance between the front and the rear of the whole is small, the width between the front and the rear of the whole is greatly reduced, the space between the front and the rear of the corresponding vehicle chassis is reduced, the space arrangement of other parts of the vehicle chassis is facilitated, and the use effect is good.

[0025] Meanwhile, the double gear shaft 5 at the left axle housing 1 and the right axle housing 2, the input gear part 61 of the front axle input shaft 6 and the gear ring 34 are used to realize the first speed reduction, then, the planetary carrier 92 and other components are used to realize the second speed reduction, so that better effect of speed reduction is realized.

[0026] Finally, the above embodiments are only used to illustrate the present application, and are not used to limit the present application, ordinary skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, therefore, all equivalent technical solutions also belong to the scope of the present application, the patent protection scope of the present application should be limited by the claims.

Claims

1. An electrically forked front drive axle structure comprising a left axle housing (1) and a right axle housing (2) fixed against each other, characterized in that: The right axle housing (2) is provided with a differential (30), the left differential housing (31) of the differential (30) is movably connected to the left axle housing (1) through a bearing, the right differential housing (32) of the differential (30) is movably connected to the right axle housing (2) through a bearing, the middle part of the two half axle gears (33) of the differential (30) is provided with a half axle (40) connected through a spline, the half axle (40) is inserted into the middle through hole of the outwardly extending left axle shaft (3) fixed on the left axle housing (1) or the middle through hole of the outwardly extending right axle shaft (4) fixed on the right axle housing (2); The left part of the rear wall surface of the right axle housing (2) is formed with a rear extension (21) extending rearward, the rear extension (21) and the rear part of the left axle housing (1) form a speed reduction cavity, the double gear shaft (5) is located in the speed reduction cavity, the left and right ends of the double gear shaft (5) are movably connected between the inner wall surface of the rear extension (21) and the rear inner wall surface of the left axle housing (1) through bearings, the double gear shaft (5) is formed with a pinion gear part (51) and a large gear part (52) connected through a spline, the front axle input shaft (6) is installed in the speed reduction cavity at the rear of the double gear shaft (5), the two ends of the front axle input shaft (6) are movably connected between the inner wall surface of the rear extension (21) and the rear inner wall surface of the left axle housing (1) through bearings, the outer side wall of the front axle input shaft (6) is formed with an input gear part (61), the input gear part (61) is engaged with the large gear part (52), the pinion gear part (51) is engaged with the ring gear (34) fixed on the left differential housing (31), the right end of the front axle input shaft (6) is inserted into the through hole formed in the wall plate of the rear extension (21).

2. The electrically driven front axle structure for a fork-lift truck according to claim 1, characterized in that: The middle part of the front axle input shaft (6) is formed with an axial through hole, the right inner side wall of the axial through hole is formed with a spline groove, and the left end of the axial through hole is provided with a sealing cover.

3. The electrically driven front axle structure for a fork-lift truck according to claim 1, characterized in that: The outer side wall of the left axle shaft (3) and the right axle shaft (4) is provided with an outer axle arm (7), the outer axle arm (7) is fixed on the outer end surface of the left axle housing (1) or the right axle housing (2), and the outer side wall of the left axle shaft (3) and the right axle shaft (4) is tightly attached to the inner side wall of the middle axial through hole of the corresponding outer axle arm (7).

4. The electrically forked front drive axle architecture of claim 3, wherein: The outer end of the outer axle arm (7) is fixed with a brake assembly (8).

5. The electrically forked front drive axle architecture of claim 4, wherein: The outer side wall of the outer end of the left axle shaft (3) and the right axle shaft (4) is movably connected with a connecting hub (9) through a bearing.

6. The electrically forked front drive axle architecture of claim 5, wherein: The inner end of the connecting hub (9) is fixedly connected with a brake hub (91) through bolts, and the brake hub (91) cooperates with the corresponding brake assembly (8).

7. The electrically driven front axle structure for a fork according to claim 5, characterized by: The outer end of the connecting hub (9) is fixedly connected with a planetary carrier (92) through a bolt, the outer end of the half shaft (40) is formed with an output shaft part (41) in the middle, which is inserted into the planetary carrier (92), and the outer side wall of the output shaft part (41) is formed with an outer gear part, the outer end of the output shaft part (41) is movably arranged on the outer end plate of the planetary carrier (92) through a bearing, the planetary carrier (92) is movably connected with a planetary gear (93) on the planetary gear shaft fixedly arranged on the outer end plate, the planetary gear (93) is engaged with the outer gear part of the output shaft part (41), the planetary carrier (92) is inserted with a planetary gear ring (94) in the inside, the planetary gear (93) is engaged with the planetary gear ring (94), the outer end face of the left axle shaft (3) and the right axle shaft (4) is fixedly arranged with a gear ring support (36), the outer side wall of the gear ring support (36) is formed with an outer gear part, which is inserted into the gear slot of the inner gear part at the inner end of the planetary gear ring (94) and is matched with the gear slot, the inner side wall of the planetary gear ring (94) at the left and right sides of the gear ring support (36) is clamped with a clamping spring, and the gear ring support (36) is between the two clamping springs.

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