Semi-automatic hydraulic puller for disassembling torsion shaft of special vehicle

Abstract

The utility model provides a semi-automatic hydraulic puller for disassembling a torsion shaft of a special vehicle. The semi-automatic hydraulic puller comprises a tension bolt, a movable clamping block, a connecting bolt, a supporting sleeve, an oil cylinder, a fixing hoop and a manual hydraulic pump. The special vehicle torsion shaft puller is simple in structure, safe, reliable and convenient to take and use, hydraulic drive replaces manual operation, when the special vehicle torsion shaft puller is used for disassembling a special vehicle torsion shaft, the torsion shaft can be efficiently and stably pulled out, a shaft body cannot be damaged, and the special vehicle torsion shaft puller is particularly suitable for the situation that a spline at the shaft end is rusted and difficult to disassemble in the medium repair stage and the major repair stage of a special vehicle. The torsion shaft dismounting device can solve the problems that impact force is large when a torsion shaft is manually dismounted, a vehicle body and parts of the vehicle body are damaged due to impact, the speed is difficult to control, and safety accidents, namely, the dismounting efficiency is low, potential quality hazards are many, and safety risks are large.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of special vehicle manufacturing and repairing, and particularly relates to a semi-automatic hydraulic puller for disassembling a torsion shaft of a special vehicle. BACKGROUND

[0002] In the production, maintenance, repair and disassembly of a torsion bar spring suspension type special vehicle, the torsion shaft often needs to be disassembled. The commonly used method is to impact the end face of the end of the torsion shaft connected to the vehicle body by using a manual tool, so that the torsion shaft is drilled out of the spline hole connected to the balancer. Because the vehicle after assembly and driving has a certain deformation, especially the vehicle in the middle repair and overhaul stage, there is rust between the splines in varying degrees, so a large impact force is needed when disassembling the torsion shaft. The current disassembly method has extremely low efficiency, is easy to damage the torsion shaft and other vehicle body parts, and is easy to cause the torsion shaft to fly out suddenly during the impact process, which has great safety risks. SUMMARY

[0003] (I) Technical problem to be solved

[0004] The utility model provides a semi-automatic hydraulic puller for disassembling a torsion shaft of a special vehicle, to solve the technical problems that the impact force is large when manually disassembling the torsion shaft, the vehicle body and its parts are damaged due to impact, the speed is difficult to control, safety accidents occur, that is, the disassembly efficiency is low, there are many quality problems, and the safety risk is large.

[0005] (II) Technical scheme

[0006] In order to solve the above technical problems, the utility model provides a semi-automatic hydraulic puller for disassembling a torsion shaft of a special vehicle, which comprises a tension bolt, a movable clamp block, a connecting bolt, a support sleeve, an oil cylinder, a fixed clamp and a manual hydraulic pump; wherein,

[0007] The head of the tension bolt is designed as a dovetail structure, the outer thread of the tail is the same as the inner thread of the threaded hole of the disassembled torsion shaft; the head of the connecting bolt is also designed as a dovetail structure, and the tail is processed with an outer thread connected to the piston rod of the oil cylinder; the movable clamp block is composed of two symmetrical parts, and the inner clamp groove part of the movable clamp block is designed as a dovetail groove structure; the heads of the tension bolt and the connecting bolt are oppositely arranged and installed in the dovetail groove of the movable clamp block, and the two parts of the movable clamp block are combined and fixed in the circumferential direction by using the fixed clamp;

[0008] The threaded hole is formed in the piston rod end of the oil cylinder, and is used for fixing connection with the tail of the connecting bolt.

[0009] Further, the middle part of the tension bolt and the connecting bolt is designed with an external hex structure for screwing.

[0010] Further, the head dovetail structure of the tension bolt and the connecting bolt is designed with a fillet and a machining allowance at the limit position in the process of combining with the dovetail groove structure of the movable clamping block.

[0011] Further, the oil inlet and outlet interface of the oil cylinder adopts a quick connector form.

[0012] Further, the stroke of the oil cylinder is 110mm-130mm, and the tension is not less than 90kN.

[0013] Further, the two ends of the support sleeve are designed with reinforcing parts, which are respectively supported on the plane of the balancer end face of the installed torsion shaft and the stop groove of the cylinder end face of the oil cylinder, and bear pressure during use.

[0014] Further, the threaded part of the connecting bolt connected with the piston rod of the oil cylinder is coated with a medium-high strength thread fastening glue.

[0015] Further, the dovetail groove of the movable clamping block is uniformly coated with lubricating grease.

[0016] (Three) beneficial effects

[0017] The utility model provides a kind of semi-automatic hydraulic puller for disassembling special vehicle torsion shaft, including tension bolt, movable clamping block, connecting bolt, support sleeve, oil cylinder, fixed clamp and hand-operated hydraulic pump.The utility model is simple structure, safe and reliable, convenient to use, to replace manual with hydraulic drive, when being used for disassembling special vehicle torsion shaft, it can efficiently and stably pull out torsion shaft and will not cause damage to shaft body, especially suitable for the situation that shaft end spline rust is difficult to disassemble in special vehicle repair, overhaul stage.The utility model can solve the problems of large impact force when manually disassembling torsion shaft, damage to vehicle body and its parts caused by impact, difficult to control speed, safety accidents, i.e. SHEET DESCRIPTION

[0018] Figure 1 It is the semi-automatic hydraulic puller structure schematic view of the utility model;

[0019] Figure 2a It is the main view of tension bolt in the utility model, Figure 2b It is side view;

[0020] Figure 3a is the main view of the connecting bolt in the utility model, Figure 3b is a side view;

[0021] Figure 4a is the main view of the movable clamping block in the utility model, Figure 4b is Figure 4a the A-direction sectional view, Figure 4c is Figure 4a the B-direction sectional view;

[0022] Figure 5a is the main view of the oil cylinder in the utility model, Figure 5b is a side view;

[0023] Figure 6a is the main view of the supporting sleeve in the utility model, Figure 6b is a side view;

[0024] Figure 7 is the schematic diagram of the use process of the semi-automatic hydraulic puller in the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, content and advantages of the utility model more clear, the specific implementation of the utility model is described in further detail below in combination with the drawings and examples.

[0026] The embodiment proposes a semi-automatic hydraulic puller for disassembling a torsion shaft of a special vehicle, the overall structure of which is shown in Figure 1 and mainly comprises a tension bolt 1, a movable clamping block 2, a connecting bolt 3, a supporting sleeve 4, an oil cylinder 5, a fixed clamping hoop 6 and a manual hydraulic pump.

[0027] The structure of the tension bolt 1 is shown in Figure 2a and 2b The head part is designed as a dovetail structure, and the outer thread of the tail part and the inner thread of the threaded hole of the disassembled torsion shaft are selected to be of the same specification. For torsion shafts of other models, corresponding tension bolts 1 can be adapted according to the inner thread specifications, so that the puller is more universal. The structure of the connecting bolt 3 is shown in Figure 3a and 3b The head part is also designed as a dovetail structure, and the tail part is processed with an outer thread connected with the piston rod of the oil cylinder 5. The middle part of the tension bolt 1 and the connecting bolt 3 is designed with an outer hexagonal structure for screwing.

[0028] The structure of the movable clamping block 2 is shown in Figures 4a to 4cAs shown, the inner clamping groove part of the movable clamping block 2 is designed as a dovetail groove structure. The heads of the tension bolt 1 and the connecting bolt 3 are oppositely arranged and installed in the dovetail groove of the movable clamping block 2, and the two parts of the movable clamping block 2 are combined, and the circumferential fixing is performed using the fixed clamping hoop 6.

[0029] The dovetail structure of the heads of the tension bolt 1 and the connecting bolt 3 is designed with a round corner and a certain machining allowance in the mortise and tenon joint process with the dovetail groove structure of the movable clamping block 2, so as to ensure the quick combination and disassembly of the puller, and the relative rotation between the tension bolt 1, the connecting bolt 3 and the movable clamping block 2 after combination, without the occurrence of clamping stagnation, and avoiding the generation of excessive axial shaking amount between the puller parts during use.

[0030] As shown in Figure 5a and 5b , the end of the piston rod of the oil cylinder 5 is provided with a threaded hole for fixed connection with the tail of the connecting bolt 3, the end face of the cylinder barrel of the oil cylinder 5 is designed with a stop groove for positioning the support sleeve 4, and the oil inlet and outlet interface of the oil cylinder 5 adopts a quick connector form and is matched with a manual hydraulic pump. The stroke of the oil cylinder 5 is 110mm-130mm, and the tension is not less than 90kN.

[0031] As shown in Figure 6a and 6b , the support sleeve 4 is a semi-closed structure, and the opening angle is convenient for sleeving the tension bolt 1, the movable clamping block 2, the connecting bolt 3 and the piston rod of the oil cylinder 5. The two ends of the support sleeve 4 are designed with reinforced parts, which are respectively supported in the plane of the balancer end face of the torsion shaft and the stop groove of the cylinder barrel end face of the oil cylinder 5, and bear pressure during use.

[0032] When the puller is combined, as shown in Figure 7 , the connecting bolt 3 is first firmly installed on the piston rod of the oil cylinder 5, and the threaded part can be coated with medium-high strength thread fastening glue; two movable clamping blocks 2 are used to connect the tension bolt 1 and the connecting bolt 3, and appropriate amount of lubricating grease needs to be uniformly coated in the dovetail groove of the movable clamping block 2 during connection; finally, the two movable clamping blocks 2 are aligned and folded circumferentially by the fixed clamping hoop 6.

[0033] During use, the outer hexagon of the tension bolt 1 is screwed, so that the threaded part is as much as possible to be screwed into the threaded hole of the torsion shaft, and the piston rod is prevented from rotating; the piston rod is tried to be extended to the limit position of the stroke, and then the support sleeve 4 is held by hand to embed each connecting part into the cavity of the support sleeve 4 through the opening of the support sleeve 4, and the tail of the support sleeve 4 is placed in the stop groove of the cylinder barrel end face of the oil cylinder 5; during the embedding process, the piston rod should be prevented from being scratched; the support sleeve 4 should not be loosened or caused to slide radially before the support sleeve 4 is stressed and compressed, and the fingers should be prevented from being pinched.

[0034] In use, the self-tension bolt 1 is screwed into the threaded hole of the torsion shaft, and during the disassembly, the tool is not allowed to be suspended without lifting support, and the overall center line of the tool and the center line of the threaded hole of the torsion shaft should be basically consistent. The oil cylinder 5 should be intermittently powered by a hydraulic pump to give the torsion shaft nearly uniform axial vibration load until it can be smoothly pulled out.

[0035] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A semi-automatic hydraulic extractor for disassembling a torsion axle of a special vehicle, characterized in that, The semi-automatic hydraulic puller comprises a tension bolt, a movable clamp block, a connecting bolt, a support sleeve, an oil cylinder, a fixed clamp and a manual hydraulic pump, wherein The head of the tension bolt is designed as a dovetail structure, the outer thread of the tail and the inner thread of the disassembled torsion shaft threaded hole are selected as the same specification; the head of the connecting bolt is also designed as a dovetail structure, and the tail is processed with an outer thread connected with the piston rod of the oil cylinder; the movable clamp block is composed of two symmetrical parts, and the inner clamping groove part of the movable clamp block is designed as a dovetail groove structure; the heads of the tension bolt and the connecting bolt are oppositely arranged and installed in the dovetail groove of the movable clamp block, and the two parts of the movable clamp block are fixed in the circumferential direction after being combined, and the fixed clamp is used for fixing; The piston rod end of the oil cylinder is provided with a threaded hole for fixed connection with the tail of the connecting bolt, and the end face of the cylinder barrel of the oil cylinder is designed with a stop groove for positioning the support sleeve; the oil inlet and outlet interface of the oil cylinder is matched with the manual hydraulic pump; the support sleeve is a semi-closed structure, which covers the tension bolt, the movable clamp block, the connecting bolt and the piston rod of the oil cylinder.

2. The semi-automatic hydraulic extractor for disassembling a torsion shaft of a special vehicle according to claim 1, characterized in that The middle part of the tension bolt and the connecting bolt is designed with an outer hexagonal structure for screwing.

3. The semi-automatic hydraulic extractor for disassembling the torsion shaft of special vehicles according to claim 1, characterized in that, The head dovetail structure of the tension bolt and the connecting bolt is designed with a round corner at the limit position and has a machining allowance during the joint of the dovetail groove structure of the movable clamp block.

4. The semi-automatic hydraulic extractor for disassembling a torsion shaft of a special vehicle according to claim 1, characterized in that The oil inlet and outlet interface of the oil cylinder adopts a quick connector form.

5. The semi-automatic hydraulic extractor for disassembling a torsion shaft of a special vehicle according to claim 1, characterized in that The stroke of the oil cylinder is 110mm-130mm, and the tension is not less than 90kN.

6. The semi-automatic hydraulic extractor for removing a torsion shaft of a special vehicle according to claim 1, characterized in that Both ends of the support sleeve are designed with a reinforcing part, which is supported in the plane of the balancer end face of the installed torsion shaft and the stop groove of the cylinder barrel end face of the oil cylinder, and bears pressure during use.

7. The semi-automatic hydraulic extractor for removing a torsion shaft of a special vehicle according to claim 1, characterized in that The threaded part of the connecting bolt connected with the piston rod of the oil cylinder is coated with medium-high strength thread fastening glue.

8. The semi-automatic hydraulic extractor for removing a torsion shaft of a special vehicle according to claim 1, characterized in that The dovetail groove of the movable clamp block is uniformly coated with lubricating grease.

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