CN218532564U

CN218532564U - Diameter necking tool for transmission shaft tube

Info

Publication number: CN218532564U
Application number: CN202222761024.1U
Authority: CN
Inventors: 雷则培; 张涵文; 陈德强
Original assignee: Xuchang Chengxiang Machinery Co ltd
Current assignee: Xuchang Chengxiang Machinery Co ltd
Priority date: 2022-10-20
Filing date: 2022-10-20
Publication date: 2023-02-28
Anticipated expiration: 2032-10-20

Abstract

The utility model relates to a diameter necking tool for a transmission shaft tube, wherein a connecting groove is arranged at the upper end of a base, connecting plates are arranged at the lower ends of two side surfaces, and a fixing bolt vertically penetrates through the center of each connecting plate; the upper die is limited and arranged right above the base through a fastening bolt, the upper surface of the upper die is provided with a groove in the shape of an inverted truncated cone, the lower surface of the upper die is provided with a buffer groove, and the buffer groove is communicated with the groove through a pressurizing hole; the mandrel comprises a middle fixing plate and a compression spring, the middle fixing plate is positioned in the buffer groove, the lower end of the middle fixing plate is provided with a limiting rod, the upper end of the middle fixing plate is concentrically connected with an extrusion block through a connecting block, an annular necking gap is formed between the extrusion block and the inner wall of the pressurizing hole, a truncated cone-shaped auxiliary positioning block is arranged above the extrusion block, and a positioning guide gap is formed between the auxiliary positioning block and the inner wall of the groove; the compression spring is sleeved outside the limiting rod, the upper end of the compression spring is contacted with the middle fixing plate, and the lower end of the compression spring is contacted with the groove bottom surface of the clamping groove; the utility model has the advantages of structural design is reasonable and the operation and use are convenient.

Description

Diameter necking tool for shaft tube of transmission shaft

Technical Field

The utility model belongs to transmission shaft spare part processing field, concretely relates to transmission shaft central siphon diameter throat frock.

Background

In the process of production and processing of the transmission shaft, the shaft tube which is formed in a standard mode is adopted, parts with the same outer diameter as the inner diameter of the shaft tube are assembled, pressed and welded, however, due to special requirements, when the special-shaped transmission shaft is processed, due to the fact that the inner diameter of the shaft tube is not matched with the outer diameter of a universal joint fork which needs to be connected with the shaft tube, when the special-shaped transmission shaft is fixedly connected, the problem needs to be solved by a method of additionally installing a reducing sleeve, namely, the reducing sleeve is additionally installed between the shaft tube and the universal joint fork, and the reducing sleeve and the universal joint fork and the shaft tube are fixedly welded, so that the fixed connection between the shaft tube and the universal joint fork is realized, the processing method needs to carry out two welding procedures, the processing operation is troublesome, the labor and the time are wasted, and meanwhile, the use of the reducing sleeve also increases the economic cost of enterprises; therefore, in order to solve the above problems, it is necessary to develop a tool for reducing the diameter of the shaft tube of the transmission shaft, which has a reasonable structural design and is convenient to operate and use.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of prior art, and provide a transmission shaft central siphon diameter throat frock that structural design is reasonable and the operation and use are convenient.

The purpose of the utility model is realized like this: a diameter necking tool for a transmission shaft tube comprises a base, an upper die and a mandrel, wherein a connecting groove is formed in the middle of the upper surface of the base, connecting plates are fixedly arranged at the lower ends of two side surfaces of the base, a clamping groove is vertically formed in the middle of the bottom surface of the connecting groove, a connecting hole is vertically formed in the center of each connecting plate, and a fixing bolt penetrates through each connecting hole;

the upper die is limited and arranged right above the base through a fastening bolt, a groove is arranged in the middle of the upper surface of the upper die, a buffer groove is arranged in the middle of the lower surface of the upper die, the whole groove is in a round table shape, the diameter of the groove is gradually reduced from top to bottom, a pressurizing hole is vertically arranged in the center of the bottom surface of the buffer groove, the diameter of the pressurizing hole is the same as that of the lower end of the groove, and the pressurizing hole is communicated with the groove;

the mandrel vertically penetrates through the center of the upper die and comprises a middle fixing plate and a compression spring, the middle fixing plate is positioned in a buffer groove, the center of the lower surface of the middle fixing plate is connected with a limiting rod, a connecting block matched with a pressurizing hole structure is fixedly arranged at the center of the upper surface of the middle fixing plate, the lower end of the limiting rod is positioned in a clamping groove, a buffer gap is formed between the lower end of the limiting rod and the groove bottom surface of the clamping groove, the upper end of the connecting block is positioned in the pressurizing hole and concentrically and fixedly provided with a cylindrical extrusion block, an annular necking gap is formed between the extrusion block and the inner wall of the pressurizing hole, a truncated cone-shaped auxiliary positioning block is concentrically and fixedly arranged above the extrusion block, the diameter of the auxiliary positioning block is gradually increased from top to bottom, the diameter of the lower end of the auxiliary positioning block is the same as that of the extrusion block, and a positioning guide gap is formed between the auxiliary positioning block and the inner wall of the groove; the compression spring is sleeved outside the limiting rod, the upper end of the compression spring is in contact with the lower surface of the middle fixing plate, and the lower end of the compression spring is located in the clamping groove and in contact with the bottom surface of the clamping groove.

The outside of dashpot open end is provided with and keeps off the ring with spread groove structure matched with, and keeps off the ring and is connected with the lower surface integral type of last mould.

The number of the fastening bolts is three, and the three fastening bolts are respectively distributed uniformly in an annular shape.

The center of the middle fixing plate, the center of the buffer groove, the center of the connecting block and the center of the pressurizing hole are all located on the same straight line.

The utility model has the advantages that: the utility model discloses a set up fixing bolt and fastening bolt, utilize fixing bolt can realize the fixed placement of base on the hydraulic press, utilize fastening bolt can realize the spacing connection between base and the last mould, through setting up dashpot and intermediate fixed plate, utilize the cooperation of dashpot and intermediate fixed plate, can realize the connection between base, last mould and the dabber while, also can limit the moving range of the whole vertical direction of dabber; by arranging the auxiliary positioning block and the groove in the shape of the circular truncated cone and utilizing the positioning guide gap formed between the auxiliary positioning block and the groove, the shaft tube can be positioned and placed before necking processing conveniently, and meanwhile, the guide effect can be played in the necking processing process; by arranging the extrusion blocks and the pressurizing holes and utilizing the necking gaps formed between the extrusion blocks and the pressurizing holes, the lower end of the shaft tube can be extruded and necked under the action of the hydraulic rod on the hydraulic machine on the lower pressure of the shaft tube; by arranging the compression spring, the elasticity of the compression spring can be utilized to play a certain role in buffering the whole mandrel in the process of necking the shaft tube, and the upward thrust action of the compression spring on the middle fixing plate can be utilized to increase the convenience of the shaft tube taking operation and realize the reset of the whole mandrel after the necking process is finished and the shaft tube is taken out; generally, the utility model has the advantages of structural design is reasonable and the operation and use are convenient.

Drawings

Fig. 1 is a cross-sectional view of the front view of the present invention when placed in a fixed position on a hydraulic machine.

Fig. 2 is a cross-sectional view of a front view of a base in the present invention.

Fig. 3 is a front view of the center core shaft of the present invention.

Fig. 4 is a cross-sectional view of a front view of an upper die in the present invention.

Fig. 5 is a cross-sectional view of a front view of the connection of the shaft tube and the yoke after the completion of the necking by the present invention.

FIG. 6 is a cross-sectional view of a front view of a prior art bottom bracket tube, reducer sleeve and yoke connection.

In the figure: 1. a base; 11. connecting grooves; 12. a connecting plate; 13. a card slot; 14. fixing the bolt; 2. an upper die; 21. a groove; 22. a buffer tank; 23. a pressurizing hole; 24. a baffle ring; 3. a mandrel; 31. a middle fixing plate; 32. a compression spring; 33. a limiting rod; 34. connecting blocks; 35. extruding the block; 36. an auxiliary positioning block; 4. fastening a bolt; 5. shaft tube (not necked down); 6. a diameter-variable sleeve; 7. a universal joint yoke; 8. an axle tube (throat); 9. and (7) welding seams.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

Example (b): as shown in fig. 1, 2, 3, 4; a diameter necking tool for a transmission shaft tube comprises a base 1, an upper die 2 and a mandrel 3, wherein a connecting groove 11 is formed in the middle of the upper surface of the base 1, connecting plates 12 are fixedly arranged at the lower ends of two side surfaces of the base, a clamping groove 13 is vertically formed in the middle of the bottom surface of the connecting groove 11, a connecting hole is vertically formed in the center of each connecting plate 12, and a fixing bolt 14 penetrates through each connecting hole; the upper die 2 is limited and arranged right above the base 1 through a fastening bolt 4, a groove 21 is formed in the middle of the upper surface of the upper die, a buffer groove 22 is formed in the middle of the lower surface of the upper die, the whole groove 21 is in a circular table shape, the diameter of the groove is gradually reduced from top to bottom, a pressurizing hole 23 is vertically formed in the center of the bottom surface of the buffer groove 22, the diameter of the pressurizing hole 23 is the same as that of the lower end of the groove 21, and the pressurizing hole 23 is communicated with the groove 21; the mandrel 3 vertically penetrates through the center of the upper die 2 and comprises a middle fixing plate 31 and a compression spring 32, the middle fixing plate 31 is located in the buffer groove 22, the center of the lower surface of the middle fixing plate is connected with a limiting rod 33, the center of the upper surface of the middle fixing plate is fixedly provided with a connecting block 34 structurally matched with the pressurizing hole 23, the lower end of the limiting rod 33 is located in the clamping groove 13, a buffer gap is formed between the lower end of the limiting rod 33 and the bottom surface of the clamping groove 13, the upper end of the connecting block 34 is located in the pressurizing hole 23 and concentrically and fixedly provided with a cylindrical extrusion block 35, an annular necking gap is formed between the extrusion block 35 and the inner wall of the pressurizing hole 23, a truncated cone-shaped auxiliary positioning block 36 is concentrically and fixedly arranged above the extrusion block 35, the diameter of the auxiliary positioning block 36 is gradually increased from top to bottom, the diameter of the lower end of the auxiliary positioning block 36 is the same as that of the extrusion block 35, and a positioning guide gap is formed between the auxiliary positioning block 36 and the inner wall of the groove 21; the compression spring 32 is sleeved outside the limiting rod 33, the upper end of the compression spring is in contact with the lower surface of the middle fixing plate 31, and the lower end of the compression spring is located in the clamping groove 13 and is in contact with the groove bottom surface of the clamping groove 13.

A baffle ring 24 structurally matched with the connecting groove 11 is arranged outside the opening end of the buffer groove 22, and the baffle ring 24 is integrally connected with the lower surface of the upper die 2; the stability of the limit connection between the base 1 and the upper die 2 can be improved by utilizing the matching and sleeving between the connecting groove 11 and the baffle ring 24; three fastening bolts 4 are arranged and are respectively and uniformly distributed in an annular shape; the center of the intermediate fixing plate 31, the center of the buffer tank 22, the center of the connecting block 34, and the center of the pressurizing hole 23 are all located on the same line.

As shown in fig. 6, among the prior art, the diameter of central siphon and universal joint fork 7 do not match, when carrying out fixed connection between to it, need install reducing cover 6 additional to all carry out fixed weld between reducing cover 6 and universal joint fork 7 and between reducing cover 6 and the central siphon, just can realize the fixed connection between central siphon and the universal joint fork 7, when this processing mode increases enterprise's economic cost, twice welding process has also influenced the efficiency of its processing.

As shown in fig. 5, process the utility model discloses the central siphon of throat is accomplished in processing, when carrying out fixed connection with universal joint fork 7, because central siphon after the throat and universal joint fork 7's diameter phase-match, when can not need to use reducing sleeve 6, only need once weld can realize the fixed connection between it, when reducing enterprise economic cost, has also increased the efficiency of its processing.

The utility model discloses before the use, need install its whole, specifically install the operation as follows: at first, place base 1 on the mounting platform in the hydraulic press (need make base 1 be located the hydraulic stem when placing), then, utilize fixing bolt 14 to accomplish the spacing connection between base 1 and the mounting platform, afterwards, with dabber 3 by wearing into down to the center department of last mould 2, treat that middle fixed plate 31 is located the inside back of dashpot 22, will go up mould 2 and dabber 3 and place directly over base 1 (when placing, must place the lower extreme of gag lever post 33 and compression spring 32 in draw-in groove 13 is inside, accomplish the cooperation of keeping off between ring 24 and the spread groove 11 and cup joint), finally, locking fastening bolt 4, utilize fastening bolt 4 can realize base 1, go up mould 2 and be located the spacing connection between the central department dabber 3 of mould 2, thereby accomplish the utility model discloses an installation.

The utility model discloses when using after the installation, will wait that the central siphon of throat is vertical to be placed in the top of last mould 2 earlier, and make the lower extreme of central siphon be located the location guide clearance that forms between assistance-localization real-time piece 36 and recess 21, then, open the hydraulic stem on the hydraulic press, the pressure effect of using the hydraulic stem to exert to the central siphon when moving down, the guide effect in cooperation location guide clearance, can make the lower extreme of central siphon move down to the throat clearance that forms between extrusion block 35 and the 23 inner walls of pressurized hole, at this moment, utilize the decurrent pressure of hydraulic stem, cooperate the extrusion limiting displacement between extrusion block 35 and the 23 inner walls of pressurized hole, can realize the throat operation of central siphon lower extreme in the throat clearance, and meanwhile, the utility model discloses a set up compression spring 32, and form the cushion gap between the lower extreme of gag lever 33 and draw-in groove 13 tank bottoms face, utilize this structure, can carry out the throat processing's in-process to the central siphon, play certain cushioning effect to the whole dabber 3, and the existence of compression spring 32 can also accomplish the throat processing after the throat processing, when taking out, the central siphon, utilize the ascending thrust action 31 of the whole reset operation of dabber to realize, 3 convenient and convenient; generally, the utility model has the advantages of structural design is reasonable and the operation and use are convenient.

Claims

1. The utility model provides a transmission shaft central siphon diameter throat frock, includes base (1), goes up mould (2) and dabber (3), its characterized in that: a connecting groove (11) is formed in the middle of the upper surface of the base (1), connecting plates (12) are fixedly arranged at the lower ends of the two side surfaces, a clamping groove (13) is vertically formed in the middle of the bottom surface of the connecting groove (11), a connecting hole is vertically formed in the center of each connecting plate (12), and a fixing bolt (14) penetrates through each connecting hole;

the upper die (2) is limited and arranged right above the base (1) through a fastening bolt (4), a groove (21) is formed in the middle of the upper surface of the upper die, a buffer groove (22) is formed in the middle of the lower surface of the upper die, the whole groove (21) is in a circular truncated cone shape, the diameter of the groove is gradually reduced from top to bottom, a pressurizing hole (23) is vertically formed in the center of the bottom surface of the buffer groove (22), the diameter of the pressurizing hole (23) is the same as that of the lower end of the groove (21), and the pressurizing hole (23) is communicated with the groove (21);

the mandrel (3) vertically penetrates through the center of the upper die (2) and comprises a middle fixing plate (31) and a compression spring (32), the middle fixing plate (31) is located in the buffer groove (22), the center of the lower surface of the middle fixing plate is connected with a limiting rod (33), a connecting block (34) structurally matched with the pressurizing hole (23) is fixedly arranged at the center of the upper surface of the middle fixing plate, the lower end of the limiting rod (33) is located in the clamping groove (13) and forms a buffer gap with the bottom surface of the clamping groove (13), the upper end of the connecting block (34) is located in the pressurizing hole (23) and is concentrically and fixedly provided with a cylindrical extruding block (35), an annular necking gap is formed between the extruding block (35) and the inner wall of the pressurizing hole (23), a truncated cone-shaped auxiliary positioning block (36) is concentrically and fixedly arranged above the extruding block (35), the diameter of the auxiliary positioning block (36) is gradually increased from top to bottom, the diameter of the lower end of the auxiliary positioning block is the diameter of the extruding block (35) and is the same as that of the extruding block (35), and a positioning guide gap is formed between the auxiliary positioning block (36) and the inner wall of the groove (21); the compression spring (32) is sleeved outside the limiting rod (33), the upper end of the compression spring is in contact with the lower surface of the middle fixing plate (31), and the lower end of the compression spring is located in the clamping groove (13) and is in contact with the bottom surface of the clamping groove (13).

2. The tool for reducing the diameter of the shaft tube of the transmission shaft according to claim 1, wherein: the outside of buffer slot (22) open end is provided with and keeps off ring (24) with connecting groove (11) structure matched with, and keeps off ring (24) and the lower surface integral type of last mould (2) and is connected.

3. The tool for reducing the diameter of the shaft tube of the transmission shaft according to claim 1, wherein: the number of the fastening bolts (4) is three, and the three fastening bolts are respectively distributed uniformly in an annular shape.

4. The tool for reducing the diameter of the shaft tube of the transmission shaft according to claim 1, wherein: the center of the middle fixing plate (31), the center of the buffer groove (22), the center of the connecting block (34) and the center of the pressurizing hole (23) are all located on the same straight line.