Split shaft speed reducer for AGV (Automatic Guided Vehicle)

Abstract

The utility model discloses a split shaft speed reducer for an AGV (Automatic Guided Vehicle). The split shaft speed reducer comprises a speed reducer main body and a motor main body connected with the speed reducer main body through a split shaft, the split shaft is composed of a motor shaft and a gear shaft, a protruding ring is arranged in the center of the top face of the motor shaft, and a first step is arranged on the bottom face of the gear shaft. A rectangular through groove is formed in the convex ring, and a convex block matched with the through groove is arranged on the bottom surface of the first step; a welding space is formed between the top surface of the convex ring and the bottom surface of the first step; the gear shaft is made of high-strength alloy steel and subjected to heat treatment, the strength is met, and no special point exists in gear hobbing installation; the motor shaft is made of common steel, the modulation hardness is low, the motor shaft and the motor shaft can be machined easily, and the product percent of pass is high.

Description

Technical Field

[0001] The utility model relates to a split - shaft speed reducer for an AGV cart. Background Art

[0002] In the existing gearbox for AGV carts, the structure of the gearbox tends to be miniaturized, requiring a small gearbox structure with a large load - bearing capacity. This requires the use of alloy steel for the gear material and corresponding heat treatment, with relatively high material requirements. As Figure 1 shown

[0003] Taking the motor as the input end, the requirements for the shaft material are relatively low. There are many keyways and screw holes on the motor shaft. If alloy steel is used and corresponding heat treatment is carried out, the deformation of the shaft is relatively large, the screw holes are prone to deformation, and the unqualified rate is relatively high.

[0004] Above, there are two contradictions. One requires high - strength alloy steel, and the other is that high strength brings increased processing difficulty and a high unqualified rate. Content of the Utility Model

[0005] Aiming at the above problems, the purpose of the utility model is to reduce costs and improve the qualification rate of the gearbox.

[0006] The technical solution to realize the utility model is as follows

[0007] A split - shaft speed reducer for an AGV cart includes a speed - reducer main body and a motor main body connected to the speed - reducer main body through a split shaft; the split shaft is composed of a motor shaft and a gear shaft. A protruding convex ring is provided in the center of the top surface of the motor shaft, and a first step is provided on the bottom surface of the gear shaft; a rectangular through - groove is opened on the convex ring, and a convex block for fitting and installation with the through - groove is provided on the bottom surface of the first step; a welding space is formed between the top surface of the convex ring and the bottom surface of the first step.

[0008] Three second steps are provided on the outer surface of the exposed end of the motor shaft.

[0009] A first weld seam is opened on the outer edge of the convex ring in the welding space, and the included angle between the first weld seam and the bottom surface of the gear shaft outside the convex block is an acute angle. Preferably, the included angle is 60° - 75°.

[0010] The gear shaft is made of high - strength alloy steel, and the motor shaft is made of steel.

[0011] First positioning screw holes are provided on the top surfaces of the convex ring on both sides of the through - groove, and second positioning screw holes are provided at positions corresponding to the positioning screw holes on the top surface of the first step.

[0012] A protruding positioning post is provided in the center of the through - groove, and a positioning hole for fitting and installation with the positioning post is provided on the bottom surface of the convex block.

[0013] The cross - section of the positioning post is conical.

[0014] With the above technical solution, the motor shaft and the gear shaft are welded together with two different materials by introducing advanced laser welding technology. Among them, the gear shaft is made of high-strength alloy steel and heat-treated, with sufficient strength and no special points in hobbing installation. The motor shaft is made of ordinary steel and has a lower hardness after quenching and tempering, which is easy to process with the motor shaft, and the product qualification rate is also very high. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the present utility model;

[0016] Figure 2 It is a schematic structural diagram of the split shaft of the present utility model;

[0017] Figure 3 It is an enlarged schematic diagram of the structure of part I of the present utility model;

[0018] In the drawings, 1 is the main body of the reducer, 2 is the split shaft, 3 is the main body of the motor, 4 is the motor shaft, 5 is the gear shaft, 6 is the convex ring, 7 is the first step, 8 is the through groove, 9 is the convex block, 10 is the welding space, 11 is the second step, 12 is the first weld seam, 13 is the bolt, and 14 is the positioning post. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the drawings of the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0020] See Figure 1 Showing the schematic structural diagram of the present application, a split shaft reducer for an AGV cart includes a reducer main body 1 and a motor main body 3 connected to the reducer main body through a split shaft 2; the split shaft is composed of a motor shaft 4 and a gear shaft 5. A protruding convex ring 6 is provided in the center of the top surface of the motor shaft, and a first step 7 is provided on the bottom surface of the gear shaft; a rectangular through groove 8 is provided on the convex ring, and a convex block 9 that is fitted and installed with the through groove is provided on the bottom surface of the first step; a welding space 10 is formed between the top surface of the convex ring and the bottom surface of the first step. Insert the convex block into the through groove to achieve pre-positioning. Since the through groove is rectangular, the convex block is not easy to rotate after being inserted; since the motor shaft and the gear shaft adopt a splicing structure instead of an integral forming structure, it can greatly save materials and reduce production costs.

[0021] Three second steps 11 are provided on the outer surface of the exposed end of the motor shaft.

[0022] A first weld seam 12 is provided on the outer edge of the convex ring within the welding space, and the angle between the first weld seam and the bottom surface of the gear shaft on the outside of the convex block is an acute angle. Preferably, the angle is 60° - 75°. The use of the first weld seam enhances the welding effect.

[0023] The gear shaft is made of high-strength alloy steel, and the motor shaft is made of steel; the two subsequent materials are welded together to reduce costs.

[0024] First positioning screw holes are provided on the top surfaces of the convex rings on both sides of the through groove, and second positioning screw holes are provided at positions corresponding to the positioning screw holes on the top surface of the first step. Relatively firm pre-fixing is carried out through the first and second positioning screw holes on both sides in cooperation with the bolt 13 to prevent the motor shaft and the gear shaft from moving during the welding process and affecting the accuracy.

[0025] A protruding positioning post 14 is provided in the center of the through groove, and a positioning hole for cooperating with the positioning post is provided on the bottom surface of the convex block. Three-point positioning is achieved through the positioning post, the positioning hole, and the first and second positioning screw holes, with high accuracy.

[0026] The cross section of the positioning post is conical. The conical structure has high positioning accuracy.

Claims

1. A split shaft speed reducer for an AGV cart, characterized in that, It includes a reducer main body and a motor main body connected to the reducer main body through a split shaft; the split shaft is composed of a motor shaft and a gear shaft. A protruding convex ring is provided in the center of the top surface of the motor shaft, and a first step is provided on the bottom surface of the gear shaft; a rectangular through groove is provided on the convex ring, and a convex block for mating installation with the through groove is provided on the bottom surface of the first step; a welding space is formed between the top surface of the convex ring and the bottom surface of the first step.

2. The split shaft reducer for an AGV cart according to claim 1, wherein, Three second steps are provided on the outer surface of the exposed end of the motor shaft.

3. The split-shaft speed reducer for an AGV cart according to claim 1, wherein, A first weld seam is provided on the outer edge of the convex ring in the welding space, and the included angle between the first weld seam and the bottom surface of the gear shaft outside the convex block is an acute angle.

4. The split shaft speed reducer for an AGV cart according to claim 1, wherein, The gear shaft is made of high-strength alloy steel, and the motor shaft is made of steel.

5. The split shaft speed reducer for an AGV cart according to claim 1, characterized in that, First positioning screw holes are provided on the top surfaces of the convex ring on both sides of the through groove, and second positioning screw holes are provided at positions corresponding to the positioning screw holes on the top surface of the first step.

6. The split shaft speed reducer for an AGV cart according to claim 1, characterized in that, A protruding positioning post is provided in the center of the through groove, and a positioning hole for mating installation with the positioning post is provided on the bottom surface of the convex block.

7. The split shaft reducer for an AGV cart according to claim 6, characterized in that, The cross section of the positioning post is conical.

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