Lower transmission case assembly of wheel excavator

Abstract

The utility model discloses a lower transmission case assembly of a wheel excavator, which aims to solve the problem that a sliding sleeve and an output shaft I are not smoothly matched easily in the using process of the lower transmission case of the existing wheel excavator, and adopts the technical scheme that the upper end of a shifting fork (11) is sleeved on a sliding sleeve (8); the sliding sleeve (8) is sleeved on the left sliding sleeve seat (13) and the right sliding sleeve seat (9) and can slide left and right, the left sliding sleeve seat (13) is connected with one end of the output shaft I (15) arranged in the box body (5), the right sliding sleeve seat (9) is connected with one end of the output shaft II (10) arranged in the box body (5), and a part of the lower end of the shifting fork (11) extends out of the box body (5) and is connected with the driving device (12) arranged outside the box body (5).

Description

Technical Field

[0001] The utility model relates to a transmission device, in particular to a lower transmission box assembly of a wheeled excavator consisting of a box body, a flange, an upper bearing seat, an input shaft, an input gear, an output shaft I and an output gear. Background Art

[0002] Currently, a wheel-type undercarriage transmission case is commercially available. Its structural features include a case body, a flange, an upper bearing seat, an input shaft, an input gear, an output shaft I, and an output gear. The input shaft is vertically mounted on the upper portion of the case body via the upper bearing seat. The upper end of the input shaft, located outside the case body, is connected to a flange. The lower end of the input shaft, which extends into the case body, is mounted to an input gear. The input gear is connected to a horizontally mounted output shaft I via the output gear. One end of output shaft I, located within the case body, is connected to one end of output shaft II, located within the case body, via a clutch mechanism, allowing the other ends of both output shafts I and II to partially extend outside the case body. A shift fork on the clutch mechanism extends partially outside the case body and connects to a drive unit located outside the case body. This structure enables single-drive operation in good road conditions and dual-drive operation in poor road conditions, providing convenient switching and low fuel consumption. However, since the output shaft I is arranged in a cantilever shape in the box, and since a tooth-shaped protrusion that can cooperate with an end face of the output shaft I is provided on one end face of the sliding sleeve, there is a problem that the sliding sleeve and the output shaft I are not smoothly matched during use. Summary of the Invention

[0003] The purpose of the utility model is to provide a wheeled excavator lower transmission box assembly which is single-drive when the road condition is good and double-drive when the road condition is bad, has convenient switching, low fuel consumption, and smooth cooperation between the sliding sleeve and the output shaft I.

[0004] In order to achieve the above purpose, the utility model wheel excavator lower transmission box assembly, by the box, flange, upper bearing seat, input shaft, input gear, output shaft I and output gear, the input shaft is vertically arranged on the upper part of the box through the upper bearing seat, the upper end of the input shaft outside the box is connected with a flange, the lower end of the input shaft extending into the box is installed with an input gear, the input gear is connected to the horizontally arranged output shaft I through the output gear, the output shaft I is arranged in the box and one end is connected to the output shaft II arranged in the box through a clutch mechanism, so that the output The other ends of shaft I and output shaft II both extend a portion outside the box body, the shift fork on the clutch mechanism extends a portion outside the box body and is connected to a drive device placed outside the box body, the clutch mechanism comprises a left sliding sleeve seat, a right sliding sleeve seat, a sliding sleeve and a shift fork, the upper end of the shift fork is sleeved on the sliding sleeve, the sliding sleeve is sleeved on the left sliding sleeve seat and the right sliding sleeve seat, and can slide left and right, the left sliding sleeve seat is connected to one end of the output shaft I placed in the box body, the right sliding sleeve seat is connected to one end of the output shaft II placed in the box body, the lower end of the shift fork extends a portion outside the box body and is connected to a drive device placed outside the box body.

[0005] An internal spline that can cooperate with the left sleeve seat and the right sleeve seat is provided on the inner surface of the sleeve, and an annular groove that facilitates the upper end of the shift fork to extend into and position is provided on the outer surface of the sleeve.

[0006] An inner spline that can cooperate with the inner surface of the sliding sleeve is provided on the outer surface of the left sliding sleeve seat.

[0007] An inner spline that can cooperate with the inner surface of the sliding sleeve is provided on the outer surface of the right sliding sleeve seat.

[0008] The center line of the output shaft I is coaxial with the center line of the output shaft II, the center line of the left sliding sleeve seat and the center line of the right sliding sleeve seat.

[0009] A bearing capable of supporting one end of the output shaft I is arranged in the box body near one end of the output shaft II.

[0010] With this structure, the clutch mechanism comprises a left and right sliding sleeves, a sleeve, and a shift fork. The upper end of the shift fork is mounted on the sleeve, which in turn is mounted on both the left and right sliding sleeves and can slide left and right. The left sleeve is connected to one end of output shaft I within the housing, while the right sleeve is connected to one end of output shaft II within the housing. The lower end of the shift fork extends partially outside the housing and is connected to a drive device located outside the housing. A bearing supporting one end of output shaft I is located within the housing near one end of output shaft II. This achieves single-drive mode in good road conditions and dual-drive mode in poor road conditions, enabling easy switching, low fuel consumption, and smooth coordination between the sleeve and output shaft I. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0012] Attachment Figure 1 It is a main sectional schematic diagram of the lower transmission box assembly of the wheeled excavator of the present invention.

[0013] In the figure: 1. Flange 2. Input shaft 3. Upper bearing seat 4. Input gear 5. Housing 6. Output gear 7. Clutch mechanism 8. Sleeve 9. Right sleeve seat 10. Output shaft II 11. Shift fork 12. Drive unit 13. Left sleeve seat 14. Bearing 15. Output shaft I. DETAILED DESCRIPTION

[0014] Attachment Figure 1 The lower transmission box assembly of the wheeled excavator of the utility model shown in the figure is composed of a box body 5, a flange 1, an upper bearing seat 3, an input shaft 2, an input gear 4, an output shaft I15 and an output gear 6. The input shaft 2 is vertically arranged on the upper part of the box body 5 through the upper bearing seat 3. The upper end of the input shaft 2 outside the box body 5 is connected with the flange 1. The lower end of the input shaft 2 extending into the box body 5 is installed with the input gear 4. The input gear 4 is connected to the horizontally arranged output shaft I15 through the output gear 6. One end of the output shaft I15 in the housing 5 is connected to one end of the output shaft II10 arranged in the housing 5 through the clutch mechanism 7, so that the other ends of the output shaft I15 and the output shaft II10 are both extended out of a portion of the housing 5. The shift fork 11 on the clutch mechanism 7 extends out of a portion of the housing 5 and is connected to the drive device 12 that has been placed outside the housing 5. The clutch mechanism 8 includes a left sliding sleeve seat 13, a right sliding sleeve seat 9, a sliding sleeve 8 and a shift fork 11. The upper end of the shift fork 11 is sleeved on the sliding sleeve 8. The sliding sleeve 8 The left sliding sleeve seat 13 and the right sliding sleeve seat 9 are mounted on the left sliding sleeve seat 13 and can slide left and right. The left sliding sleeve seat 13 is connected to one end of the output shaft I15 placed in the box body 5, and the right sliding sleeve seat 9 is connected to one end of the output shaft II10 placed in the box body 5. The lower end of the shift fork 11 extends out of the box body 5 and is connected to the drive device 12 placed outside the box body 5. An internal spline that can cooperate with the left sliding sleeve seat 13 and the right sliding sleeve seat 9 is provided on the inner surface of the sliding sleeve 8, and a spline that is convenient for The upper end of the shift fork 11 extends into the positioning annular groove; an internal spline that can cooperate with the inner surface of the sleeve 8 is provided on the outer surface of the left sleeve seat 13; an internal spline that can cooperate with the inner surface of the sleeve 8 is provided on the outer surface of the right sleeve seat 9; the center line of the output shaft I15 is coaxial with the center line of the output shaft II10, the center line of the left sleeve seat 13 and the center line of the right sleeve seat 9; a bearing 14 that can support one end of the output shaft I15 is provided in the box body 5 near one end of the output shaft II10.

Claims

1. A lower transmission case assembly for a wheeled excavator, comprising a housing, a flange, an upper bearing seat, an input shaft, an input gear, an output shaft I, and an output gear. The input shaft is vertically disposed on the upper portion of the housing through the upper bearing seat. The upper end of the input shaft outside the housing is connected to a flange. An input gear is mounted on the lower end of the input shaft extending into the housing. The input gear is connected to a horizontally disposed output shaft I through the output gear. One end of the output shaft I disposed within the housing is connected to one end of the output shaft II disposed within the housing through a clutch mechanism, so that the other ends of the output shaft I and the output shaft II both extend partially outside the housing. The shift fork on the clutch mechanism extends partially outside the housing and is connected to a drive device disposed outside the housing. The invention is characterized in that: The clutch mechanism (7) includes a left sliding sleeve seat (13), a right sliding sleeve seat (9), a sliding sleeve (8) and a shift fork (11). The upper end of the shift fork (11) is mounted on the sliding sleeve (8). The sliding sleeve (8) is mounted on the left sliding sleeve seat (13) and the right sliding sleeve seat (9) and can slide left and right. The left sliding sleeve seat (13) is connected to one end of the output shaft I (15) placed in the box (5). The right sliding sleeve seat (9) is connected to one end of the output shaft II (10) placed in the box (5). The lower end of the shift fork (11) extends partly outside the box (5) and is connected to the drive device (12) placed outside the box (5).

2. The wheeled excavator lower transmission case assembly according to claim 1, characterized in that: An internal spline capable of cooperating with the left sleeve seat (13) and the right sleeve seat (9) is provided on the inner surface of the sleeve (8), and an annular groove for facilitating the insertion and positioning of the upper end of the shift fork (11) is provided on the outer surface of the sleeve (8).

3. The wheel excavator lower transmission box assembly according to claim 1, characterized in that: An inner spline capable of cooperating with the inner surface of the sliding sleeve (8) is provided on the outer surface of the left sliding sleeve seat (13).

4. The wheel excavator lower transmission case assembly according to claim 1, characterized in that: An inner spline capable of cooperating with the inner surface of the sliding sleeve (8) is provided on the outer surface of the right sliding sleeve seat (9).

5. The wheel excavator lower transmission case assembly according to claim 1, characterized in that: The center line of the output shaft I (15) is coaxial with the center line of the output shaft II (10), the center line of the left sliding sleeve seat (13) and the center line of the right sliding sleeve seat (9).

6. The wheel excavator lower transmission case assembly according to claim 1, characterized in that: A bearing (14) capable of supporting one end of the output shaft I (15) is provided in the housing (5) near one end of the output shaft II (10).

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