Drive axle for electric fork lift truck

Abstract

The utility model discloses a drive shaft for electric fork truck drive axle, including output shaft and flange plate, still include the fixed ring of output shaft cover, be provided with elastic link on the fixed ring, when two flange plates are connected with each other, elastic link passes flange plate in proper order, and is fixed with the flange disc of far away fixed ring, and elastic link includes the fixed link of fixed link connection, and the fixed link end portion is equipped with a plurality of support rods in the circumference, and the support rod end portion is equipped with the boss, and a plurality of bosses constitute the clamping portion of flange disc clamping of far away fixed ring, and the fixed hole of flange disc is equipped with the bushing of less than the clamping portion outer diameter and is pressed and embedded in interference fit in fixed hole, and the inner wall of bushing is contacted with elastic link, and two flange plates are fixed through screw rod, are used for improving the connecting strength of flange plate, and the slide bar is connected to screw rod, and the slide bar outer slide sliding seat, and the end portion is equipped with the fixed seat, and the spring is equipped between sliding seat and fixed seat, is used for improving the radial stress capacity of slide bar, makes drive shaft possess quick assembly and disassembly, anti-loosening function.

Description

Technical Field

[0001] This utility model belongs to the field of drive shaft technology, and in particular relates to drive shafts for electric forklift drive axles. Background Technology

[0002] In the drive axle of an electric forklift, the drive shaft is the core transmission component. Its main function is to transmit the torque from the drive motor to the wheels, providing driving force for the entire vehicle. It needs to have sufficient strength to withstand complex loads and impacts, and ensure the smoothness and reliability of power transmission. Its performance is directly related to the overall operating efficiency, load-bearing capacity, and operational safety of the vehicle. Currently, most common drive shaft flange connections use bolts for direct fastening. Although the structure is simple, under conditions such as frequent start-stop and heavy-load vibration, problems such as bolt loosening, reduced alignment accuracy, and low installation efficiency are prone to occur, affecting transmission stability and component life. Utility Model Content

[0003] The purpose of this utility model is to solve the above-mentioned technical problems existing in the prior art and to provide a drive shaft for electric forklift drive axle, which has the functions of quick assembly and disassembly and anti-loosening.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] The drive shaft for the drive axle of an electric forklift includes an output shaft and a flange. The output shaft is fitted with a retaining ring, and the retaining ring is provided with an elastic rod. When the two flanges are connected to each other, the elastic rod passes through the flanges in sequence and is engaged and fixed with the flange furthest from the retaining ring.

[0006] Furthermore, the elastic rod includes a fixed rod connected to the fixed ring, and a plurality of support rods are provided circumferentially at the end of the fixed rod. The end of the support rod is provided with a protrusion, and the plurality of protrusions constitute a snap-fit ​​part that snaps into the flange away from the fixed ring.

[0007] Furthermore, the flange is provided with a fixing hole smaller than the outer diameter of the snap-fit ​​part, and a bushing is press-fitted into the fixing hole with an interference fit, and the inner wall of the bushing is in contact with the elastic rod.

[0008] Furthermore, the two flanges are secured with bolts to enhance the connection strength of the flanges.

[0009] Furthermore, the screw is connected to a slide rod, the slide rod is fitted with a sliding seat, and the end is provided with a fixed seat. A spring is provided between the sliding seat and the fixed seat to improve the radial force capacity of the slide rod.

[0010] Furthermore, the slide bar is connected to a rotating seat, which has a groove for rotating the screw.

[0011] Furthermore, the flange is provided with a screw hole for mounting the screw rod, and the inner wall of the screw hole is provided with a groove for limiting the sliding seat and compressing the spring.

[0012] Furthermore, the flange is provided with countersunk holes for mounting a swivel seat.

[0013] Furthermore, the end face of the flange is provided with an annular protrusion tapered guide portion.

[0014] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0015] 1. In this utility model, by setting a tapered guide part on the end face of the flange, and the elastic rod and snap-fit ​​structure on the fixing ring, the quick insertion and locking of the two flanges are realized, which significantly improves the assembly and disassembly efficiency of the drive shaft.

[0016] 2. In this utility model, by press-fitting a wear-resistant bushing into the flange fixing hole with an interference fit, the wear of the flange is effectively reduced, the overall service life is extended, and the maintenance cost is reduced.

[0017] 3. In this utility model, a screw is used for auxiliary fastening, and together with the slide rod, sliding seat, fixed seat and spring, they form a force-increasing and anti-loosening mechanism. The compression deformation of the spring provides continuous radial pressure, which greatly improves the anti-loosening ability and vibration and impact resistance of the screw connection. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the drive shaft for the drive axle of the electric forklift in this utility model;

[0020] Figure 2 This is a schematic diagram of the drive shaft for the drive axle of the electric forklift in this utility model;

[0021] Figure 3 for Figure 2 Enlarged schematic diagram of the local structure at point A;

[0022] Figure 4 for Figure 2 A magnified view of the local structure at point B.

[0023] In the diagram: 1-Output shaft; 2-Flange; 3-Retaining ring; 4-Elastic rod; 5-Fixing rod; 6-Support rod; 7-Protrusion; 8-Snap-fit ​​part; 9-Fixing hole; 10-Bushing; 11-Screw; 12-Slide rod; 13-Sliding seat; 14-Fixing seat; 15-Spring; 16-Rotating seat; 17-Groove; 18-Screw hole; 19-Slide groove; 20-Counterhead hole; 21-Conical guide part. Detailed Implementation

[0024] like Figures 1 to 4As shown, this utility model relates to a drive shaft for an electric forklift drive axle, comprising an output shaft 1 and a flange 2. A retaining ring 3 is fitted around the outer periphery of the output shaft 1, and an elastic rod 4 is provided on the retaining ring 3. When the two flanges 2 are connected to each other, the elastic rod 4 passes through the two flanges 2 in sequence and engages with the flange 2 on the side away from the retaining ring 3.

[0025] The elastic rod 4 includes a fixed rod 5 connected to the fixed ring 3. Several support rods 6 are arranged circumferentially at the end of the fixed rod 5. The end of the support rod 6 is provided with a protrusion 7. The multiple protrusions 7 together form a snap-fit ​​part 8 that snaps into the flange 2. The diameter of the fixing hole 9 opened on the flange 2 is smaller than the outer diameter of the snap-fit ​​part 8. When the elastic rod 4 moves through the flange 2, the support rod 6 deforms. After the elastic rod 4 moves through the flange 2, the support rod 6 returns to its original shape, so that the protrusion 7 is located outside the flange 2 and snaps into the flange 2.

[0026] A bushing 10 is press-fitted into the fixing hole 9 with an interference fit. The inner wall of the bushing 10 contacts the elastic rod 4. The two flanges 2 are further fixed by screws 11 to enhance the connection strength.

[0027] The bushing 10 can be made of nylon or copper-based alloy.

[0028] The screw 11 is connected to the slide rod 12. The slide rod 12 is slidably sleeved with a sliding seat 13 and a fixed seat 14 at its end. A spring 15 is provided between the sliding seat 13 and the fixed seat 14. The radial force capacity of the slide rod 12 is improved by the deformation of the spring 15.

[0029] The slide bar 12 is also connected to a rotating seat 16, on which a groove 17 is provided for rotating the screw 11.

[0030] The flange 2 is provided with a screw hole 18 for mounting the screw 11. A groove 19 is opened on the inner wall of the screw hole 18 to limit the sliding seat 13. When the screw 11 is screwed in, the outer side of the sliding seat 13 slides in the groove 19 and compresses the spring 15.

[0031] The flange 2 is also provided with countersunk holes 20 for mounting the swivel seat 16.

[0032] The end face of the flange 2 is provided with an annular protruding tapered guide portion 21, and the end face connected to the flange 2 is provided with a tapered groove that matches the tapered guide portion 21. When the two flanges 2 are connected, the tapered guide portion 21 is embedded in the tapered groove to achieve automatic centering.

[0033] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A drive shaft for an electric forklift drive axle, comprising an output shaft and a flange, characterized in that: The output shaft is fitted with a retaining ring, and the retaining ring is provided with an elastic rod. When the two flanges are connected to each other, the elastic rod passes through the flanges in sequence and is engaged and fixed with the flange away from the retaining ring.

2. The drive shaft for an electric forklift drive axle according to claim 1, characterized in that: The elastic rod includes a fixed rod connected to a fixed ring. The fixed rod has a plurality of support rods circumferentially arranged at its end. The support rods have protrusions at their ends. The plurality of protrusions form a snap-fit ​​part that snaps into a flange away from the fixed ring.

3. The drive shaft for an electric forklift drive axle according to claim 2, characterized in that: The flange is provided with a fixing hole smaller than the outer diameter of the snap-fit ​​part. A bushing is press-fitted into the fixing hole with an interference fit, and the inner wall of the bushing is in contact with the elastic rod.

4. The drive shaft for an electric forklift drive axle according to claim 1, characterized in that: The two flanges are fixed by bolts to improve the connection strength of the flanges.

5. The drive shaft for an electric forklift drive axle according to claim 4, characterized in that: The screw is connected to a slide rod, the slide rod is fitted with a sliding seat, and the end is provided with a fixed seat. A spring is provided between the sliding seat and the fixed seat to improve the radial force capacity of the slide rod.

6. The drive shaft for an electric forklift drive axle according to claim 5, characterized in that: The slide bar is connected to a rotating seat, and the rotating seat has a groove for rotating the screw.

7. The drive shaft for an electric forklift drive axle according to claim 5, characterized in that: The flange is provided with a screw hole for mounting a screw rod, and the inner wall of the screw hole is provided with a sliding groove for limiting the sliding seat and compressing the spring.

8. The drive shaft for an electric forklift drive axle according to claim 6, characterized in that: The flange is provided with countersunk holes for mounting the rotary seat.

9. The drive shaft for an electric forklift drive axle according to claim 1, characterized in that: The end face of the flange is provided with an annular protrusion tapered guide portion.

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