CN108150556B

CN108150556B - A kind of universal joint

Info

Publication number: CN108150556B
Application number: CN201711252122.XA
Authority: CN
Inventors: 陈孜然
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-12-01
Filing date: 2017-12-01
Publication date: 2019-07-19
Anticipated expiration: 2037-12-01
Also published as: CN108150556A

Abstract

This application provides a kind of universal joints, including the first rotating member, the second rotating member, connector and transmission shaft, first rotating member is pivotably attached to the inner ring of the connector, second rotating member is pivotably attached to the outer ring of the connector, it wherein, further include buffer unit, the buffer unit is arranged between the transmission shaft and first rotating member, the transmission shaft drives the buffer unit rotation, and the buffer unit then drives the first rotating member to rotate；Universal joint provided by the present application, since the transmission shaft and first rotating member have buffer structure in its axial direction, the axial force that thus transmission shaft gives universal joint application can be buffered effectively, so that universal joint is able to maintain better stability in the process of running.

Description

A kind of universal joint

Technical field

The present invention relates to a kind of connection structures, more particularly to a kind of universal joint.

Background technique

Universal joint, that is, universal joint is the parts for realizing the transmitting of varied angle power, for needing to change transmission axis direction Position be easy to cause vibration when transmission shaft is by axial force, aggravate the damage of universal joint parts, generate very big makes an uproar Sound.

Chinese patent CN201310064682.8 discloses a kind of universal joint comprising the first rotating member, the first connection group Part, the second rotating member and the second connection component, the universal joint further include the connector of annular, first rotating member by this One connection component is connect with the connector, which is connect by second connection component with second rotating member, the connection The perforation of part opposite sides offers the first connecting hole, and in addition opposite sides perforation offers the second connecting hole, and this two first The line of centres of connecting hole and the line of centres of two second connecting holes are orthogonal, which is arranged in the connection In part, which is arranged in be rotatablely connected first rotating member and the connector in first connecting hole, this Two rotating members are rotationally sheathed on outside the connector, which is arranged in second connecting hole to be rotatablely connected and be somebody's turn to do Second rotating member and the connector；Do not have on the axial direction that the splined shaft for being used to be driven in the invention is connect with universal joint Buffer structure is set, and cushion performance is poor, in use, when splined shaft is by external force, can generate to universal joint very big Impact, cause the parts of universal joint to damage, influence operation stability.

It is those skilled in the art in conclusion how effectively to be buffered the active force between universal joint and transmission shaft Member's urgent problem.

Summary of the invention

The object of the present invention is to provide a kind of universal joint, solve between existing universal joint and transmission shaft without buffering knot Structure, cushion performance is poor, the shortcoming for causing the parts of universal joint to damage.

In order to solve the above technical problems, the invention provides the following technical scheme: a kind of universal joint, including the first rotating member, Second rotating member, connector and transmission shaft, first rotating member are pivotably attached to the inner ring of the connector, and described second turn Moving part is pivotably attached to the outer ring of the connector, wherein further includes buffer unit, the buffer unit is arranged in the transmission Between axis and first rotating member, the transmission shaft drives the buffer unit rotation, and the buffer unit then drives the The rotation of one rotating member.

Further, the buffer unit includes the sleeve being coaxially set and inner shaft, and the transmission shaft passes through the first flower Key drives the sleeve rotating, the transmission shaft and the sleeve to be connected radial through attachment screw, first rotating member with Cylindrical spring is equipped between the sleeve, the bottom of the cylindrical spring is equipped with gasket, between the transmission shaft and the sleeve Equipped with volute spring, it is connected at the top of the top of the inner shaft and first rotating member by lock nut.

Further, it is received in the top of the transmission shaft and forms mandril, the hollow formation sliding slot of mandril, the mandril Top is equipped with shallow slot, and the periphery of the shallow slot is equipped with rounding, the spring silk cross section of the diameter of a circle and the volute spring Diameter is equal, and the bottom end spring silk outer diameter of the volute spring is kept out on the rounding.

Further, the lower hollow of the sleeve forms cavity of resorption, the top of the mandril be set to it is described under it is intracavitary, it is described Under it is intracavitary be equipped with the first keyway compatible with first spline, the upper hollow of the sleeve forms epicoele, the epicoele It is inside equipped with the second keyway, partition is equipped between the epicoele and the cavity of resorption, the centre of the partition, which is equipped with, is connected to the epicoele With the first via hole of the cavity of resorption, the top surface of the partition is equipped with flange outstanding, the bottom of the flange and the epicoele upwards Portion forms annular groove, and the gasket is arranged in the annular groove, and the bottom end of the cylindrical spring is set on the flange and keeps out On the gasket, the volute spring is arranged in the top of the cavity of resorption, the top of the volute spring keep out it is described every The bottom surface of plate, the radial equipartition of the partition are equipped at least three supporting elements, the supporting element include steel ball, bullet block, spring and Nut is blocked, the steel ball right end is kept out on the periphery of inner shaft, and the left end of the steel ball is kept out on the bullet block, the bullet It is provided with the spring between block and closure nut, one week of the bullet block is evenly equipped with several the first ventilation holes, the closure The centre of nut is provided with the second ventilation hole.

Further, the top of first rotating member is equipped with counter sink, and the lock nut is arranged in the counter sink In, the bottom periphery of first rotating member is equipped with the second spline compatible with second keyway, first rotation The lower hollow of part forms accommodating chamber, and the second via hole, second via hole are communicated between the accommodating chamber and the counter sink Internal diameter be less than the accommodating chamber internal diameter.

Further, the top of the inner shaft is equipped with the screw thread to match with the lock nut, the bottom of the inner shaft End is equipped with traveller, and the traveller is slidably arranged in the sliding slot, and the middle part of the inner shaft is equipped with shoulder block, the bottom of the shoulder block Interior receipts form convex shoulder, and the top surface of the convex shoulder is stop surface, are set at the top of the cylindrical spring on the convex shoulder and described The top of cylindrical spring is kept out on the stop surface, and the top of the inner shaft passes through second via hole and passes through the locking Nut is fixed, and synchronously, the top surface of the shoulder block is kept out on the top of the accommodating chamber, and the bottom end of the inner shaft passes through described the One via hole protrudes into the cavity of resorption.

Further, the inner shaft and matching for second via hole are combined into interference fit, the inner shaft and first mistake Matching for hole is combined into clearance fit.

Further, the outer diameter of the cylindrical spring is slightly less than the internal diameter of the accommodating chamber, the internal diameter of the cylindrical spring Slightly larger than the diameter of the convex shoulder.

Further, the top outer diameter of the volute spring is slightly less than the internal diameter of the cavity of resorption.

Further, when the transmission shaft is by external force in axial direction, the transmission shaft squeezes the volute spring, institute It states sleeve and is slided by first via hole along the inner shaft, existed between the second keyway and second spline radial sliding Dynamic, the gasket squeezes the cylindrical spring, synchronously, the cavity of resorption and the upper intracavitary gas by the first ventilation hole and Second ventilation hole is outwardly vented or from extraneous air-breathing.

It can be seen from above-mentioned technical proposal the invention has the following advantages:

1. due to being equipped with buffer unit between the first rotating member and transmission shaft, thus；Transmission shaft gives universal joint application Axial force can be buffered effectively, so that universal joint is able to maintain better stability in the process of running.It ties below Closing the drawings and specific embodiments, the present invention is described in further detail.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis The attached drawing of offer obtains other attached drawings.

Fig. 1 is overall structure diagram of the invention.

Fig. 2 is axonometric schematic diagram of the invention.

Fig. 3 is A-A cross-sectional view in Fig. 2 of the invention.

Fig. 4 is the structural schematic diagram of the first rotating member of the invention.

Fig. 5 is the structural schematic diagram of transmission shaft of the invention.

Fig. 6 is the structural schematic diagram of sleeve of the invention.

Fig. 7 is the structural schematic diagram of turning-bar of the invention.

Fig. 8 is the structural schematic diagram of inner shaft of the invention.

Fig. 9 is the partial enlarged view of Fig. 6 of the invention.

Description of symbols: the first rotating member -1, counter sink -11, rounding -111, the second via hole -12, the second spline -13, Accommodating chamber -14, the second rotating member -2, connector -3, transmission shaft -4, the first spline -41, mandril -42, shallow slot -43, sliding slot -44, Buffer unit -5, sleeve -51, cavity of resorption -511, the first keyway -5111, epicoele -512, the second keyway -5121, annular groove -5122, every Plate -513, flange -5131, the first via hole -5132, supporting element -514, steel ball -5141, bullet block -5142, the first ventilation hole - 51421, spring -5143, block nut -5144, be the second ventilation hole -51441, inner shaft -52, screw thread -521, shoulder block -522, convex Shoulder -5221, only shoulder -5222, traveller -523, cylindrical spring -53, volute spring -54, gasket -55, lock nut -56, connection spiral shell Nail -6.

Specific embodiment

The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be defined by the claims Implement with the multitude of different ways of covering.

The application is described further below with reference to Fig. 1 to Fig. 9, a kind of universal joint as depicted in figs. 1 and 2, including First rotating member 1, the second rotating member 2, connector 3 and transmission shaft 4, the first rotating member 1 are pivotably attached to the inner ring of connector 3, Second rotating member 2 is pivotably attached to the outer ring of connector 3, wherein further includes buffer unit 5, buffer unit 5 is arranged in transmission shaft 4 and first between rotating member 1, and transmission shaft 4 drives buffer unit 5 to rotate, and buffer unit 5 then drives the first rotating member 1 to rotate.

As shown in Figure 1, buffer unit 5 includes the sleeve 51 being coaxially set and inner shaft 52, transmission shaft 4 passes through the first spline 41 band moving sleeves 51 rotate, and transmission shaft 4 and sleeve 51 are connected radial through attachment screw 6, between the first rotating member 1 and sleeve 51 Equipped with cylindrical spring 53, the bottom of cylindrical spring 53 is equipped with gasket 55, and volute spring 54 is equipped between transmission shaft 4 and sleeve 51, It is connected at the top of the top of inner shaft 52 and the first rotating member 1 by lock nut 56.

Preferably, by adding sleeve 51 between the first rotating member 1 and transmission shaft 4 of universal joint, and in sleeve 12 Interior setting cylindrical spring 53 and volute spring 54 subtract so that the axial force that transmission shaft 4 is applied to the first rotating member 1 is buffered The light parts damage of universal joint, ensure that the even running of universal joint.

As shown in Figure 4 and Figure 5, it is received in the top of transmission shaft 4 and forms mandril 42, the hollow formation sliding slot 44 of mandril 42, mandril 42 top is equipped with shallow slot 43, and the periphery of shallow slot 43 is equipped with rounding 431, and the diameter of rounding 431 and the spring silk of volute spring 54 are horizontal Diameter of section is equal, and the bottom end spring silk outer diameter of volute spring 54 is kept out on rounding 431.

Preferably, the bottom end spring silk outer diameter of volute spring 54 is kept out on rounding 431, due to the diameter and cone of rounding 431 The spring silk cross-sectional diameter of shape spring 54 is equal, so that the bottom end spring silk outer diameter of volute spring 54 is just fitted on rounding 431, Further ensure the axial direction of volute spring 54.

As shown in Fig. 4, Fig. 6 and Fig. 9, the lower hollow of sleeve 51 forms cavity of resorption 511, and the top of mandril 42 is set to cavity of resorption In 511, first keyway 5111 compatible with the first spline 41 is equipped in cavity of resorption 511, the upper hollow of sleeve 51 forms epicoele 512, epicoele 512 is interior to be equipped with the second keyway 5121, partition 513 is equipped between epicoele 512 and cavity of resorption 511, the centre of partition 513 is set There is the first via hole 5132 of connection epicoele 512 and cavity of resorption 511, the top surface of partition 513 is equipped with flange 5131 outstanding, flange upwards 5131 form annular groove 5122 with the bottom of epicoele 512, and gasket 55 is arranged in annular groove 5122, and the bottom end of cylindrical spring 53 is set in It on flange 5131 and keeps out on gasket 55, the top of cavity of resorption 511 is arranged in volute spring 54, and the top of volute spring 54 is supported For gear in the bottom surface of partition 513, the radial equipartition of partition 513 is equipped at least three supporting elements 514, and supporting element 514 includes steel ball 5141, bullet block 5142, spring 5143 and closure nut 5144,5141 right end of steel ball are kept out on the outer shaft of inner shaft 52, steel ball 5141 left end is kept out on bullet block 5142, is provided with spring 5143, bullet block 5142 between bullet block 5142 and closure nut 5144 Be evenly equipped within one week several first ventilation holes 51421, the centre for blocking nut 5144 is provided with the second ventilation hole 51441.

Preferably, inner shaft 52 is supported in the process of running because twisting resistance and vibration have certain bending using steel ball 5141 Gear avoids the sliding friction between inner shaft 52 and the first via hole 5132, improves the steady of universal joint on the periphery of inner shaft 52 It is qualitative.

Preferably, the inner cavity of sleeve 51 is divided into cavity of resorption 511 and epicoele 512 by partition 513, is volute spring 54 and cylindricality bullet The placement of spring 53 provides space, so that having two-stage damping structure between transmission shaft 4 and the first rotating member 1, strengthens ten thousand To the buffering effect of section.

As shown in figs. 4 and 7, the top of the first rotating member 1 is equipped with counter sink 11, and lock nut 56 is arranged in counter sink 11 In, the bottom periphery of the first rotating member 1 is equipped with second spline 13 compatible with the second keyway 5121, the first rotating member 1 Lower hollow forms accommodating chamber 14, and the second via hole 12, the internal diameter of the second via hole 12 are communicated between accommodating chamber 14 and counter sink 11 Less than the internal diameter of accommodating chamber 14.

As shown in Figure 4 and Figure 8, the top of inner shaft 52 is equipped with the screw thread 521 to match with lock nut 56, the bottom of inner shaft 52 End is equipped with traveller 523, and traveller 523 is slidably arranged in sliding slot 44, and the middle part of inner shaft 52 is equipped with shoulder block 522, the bottom of shoulder block 522 Interior receipts form convex shoulder 5221, and the top surface of convex shoulder 5221 is stop surface 5222, the top of cylindrical spring 53 is set on convex shoulder 5221, And the top of cylindrical spring 53 is kept out on stop surface 5222, the top of inner shaft 52 passes through the second via hole 12 and passes through lock nut 56 is fixed, and synchronously, the top surface of shoulder block 522 is kept out on the top of accommodating chamber 14, and the bottom end of inner shaft 52 passes through the first via hole 5132 It protrudes into cavity of resorption 511.

Preferably, inner shaft 52 uses cemented carbide material, has high hardness, wear-resisting, intensity and toughness preferable, heat-resisting, resistance to The advantages that corrosion, the setting of inner shaft 52 play the axial direction in 1 three's transmission process of transmission shaft 4, sleeve 51 and the first rotating member Good supporting role is arrived.

Preferably, inner shaft 52 and matching for the second via hole 12 are combined into interference fit, and guarantee inner shaft 52 is tight with the first rotating member 1 Close combination, inner shaft 52 and the first via hole 5132 with being combined into clearance fit, in buffering course, inner shaft 52 can be easily the It is slided in one via hole 5132.

As shown in figure 4, the outer diameter of cylindrical spring 53 is slightly less than the internal diameter of accommodating chamber 14, in this way, cylindrical spring 53 is accommodating It is not shaken in chamber 14, reduces noise in universal joint operational process；The internal diameter of cylindrical spring 53 is slightly larger than the diameter of convex shoulder 5221, is In order to which the bottom end of cylindrical spring 53 can be closely set on convex shoulder 5221.

As shown in figure 4, the top outer diameter of volute spring 54 is slightly less than the internal diameter of cavity of resorption 511, so that volute spring 54 is under Steadily placed in chamber 511, do not generate and radially slide, ensure that volute spring 54 always with 121 coaxial line of cavity of resorption.

Preferably, when transmission shaft 4 is by external force in axial direction, transmission shaft 4 squeezes volute spring 54, and sleeve 51 passes through the One via hole 5132 is slided along inner shaft 52, is existed between the second keyway 5121 and the second spline 13 and is radially slided, and gasket 55 squeezes Cylindrical spring 53, in this way, the external force that transmission shaft 4 is applied to the first rotating member 1 can be buffered effectively, so that universal joint exists Better stability is able to maintain in operational process, synchronously, as shown in figure 9, the gas in cavity of resorption 511 and epicoele 512 passes through First ventilation hole 51421 and the second ventilation hole 51441 are outwardly vented or from extraneous air-breathing, prevent because of cavity of resorption 511 and epicoele 512 The resistance of interior gas pressure intensity and influence buffering effect.

These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification, Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims

1. a kind of universal joint, including the first rotating member (1), the second rotating member (2), connector (3) and transmission shaft (4), described One rotating member (1) is pivotably attached to the inner ring of the connector (3), and second rotating member (2) is pivotably attached to the connection The outer ring of part (3), which is characterized in that further include buffer unit (5), the buffer unit (5) setting in the transmission shaft (4) and Between first rotating member (1), the transmission shaft (4) drives buffer unit (5) rotation, the buffer unit (5) after And the first rotating member (1) rotation is driven, the buffer unit (5) includes the sleeve (51) being coaxially set and inner shaft (52), institute It states transmission shaft (4) and drives sleeve (51) rotation, the transmission shaft (4) and the sleeve (51) diameter by the first spline (41) It is connected to by attachment screw (6), is equipped with cylindrical spring (53) between first rotating member (1) and the sleeve (51), institute The bottom for stating cylindrical spring (53) is equipped with gasket (55), and volute spring is equipped between the transmission shaft (4) and the sleeve (51) (54), it is connected at the top of the top of the inner shaft (52) and first rotating member (1) by lock nut (56), the transmission shaft (4) it receives and is formed mandril (42) in top, the hollow formation sliding slot (44) of mandril (42), the top of the mandril (42) is equipped with The periphery of shallow slot (43), the shallow slot (43) is equipped with rounding (431), the diameter and the volute spring of the rounding (431) (54) spring silk cross-sectional diameter is equal, and the bottom end spring silk outer diameter of the volute spring (54) is kept out on the rounding (431), The lower hollow of the sleeve (51) forms cavity of resorption (511), and the top of the mandril (42) is set in the cavity of resorption (511), institute It states and is equipped with first spline (41) compatible first keyway (5111), the top of the sleeve (51) in cavity of resorption (511) Hollow formation epicoele (512), the epicoele (512) is interior to be equipped with the second keyway (5121), the epicoele (512) and the cavity of resorption (511) partition (513) are equipped between, the centre of the partition (513), which is equipped with, is connected to the epicoele (512) and the cavity of resorption (511) top surface of the first via hole (5132), the partition (513) is equipped with flange outstanding (5131), the flange upwards (5131) annular groove (5122) being formed with the bottom of the epicoele (512), gasket (55) setting is interior in the annular groove (5122), The bottom end of the cylindrical spring (53) is set on the flange (5131) and keeps out on the gasket (55), the taper Spring (54) is arranged at the top of the cavity of resorption (511), and the top of the volute spring (54) is kept out in the partition (513) The radial equipartition of bottom surface, the partition (513) is equipped at least three supporting elements (514), and the supporting element (514) includes steel ball (5141), bullet block (5142), spring (5143) and closure nut (5144), steel ball (5141) right end are kept out in inner shaft (52) Periphery on, the left end of the steel ball (5141) is kept out on the bullet block (5142), the bullet block (5142) and block nut (5144) it is provided between the spring (5143), the bullet block (5142) is evenly equipped with several first ventilation holes for one week (51421), the centre for blocking nut (5144) is provided with the second ventilation hole (51441).

2. universal joint according to claim 1, which is characterized in that the top of first rotating member (1) is equipped with counter sink (11), the lock nut (56) is arranged in the counter sink (11), and the bottom periphery of first rotating member (1) is equipped with Compatible second spline (13) with second keyway (5121), the lower hollow of first rotating member (1), which is formed, to be accommodated Chamber (14) is communicated with the second via hole (12) between the accommodating chamber (14) and the counter sink (11), second via hole (12) Internal diameter be less than the accommodating chamber (14) internal diameter.

3. universal joint according to claim 2, which is characterized in that the top of the inner shaft (52) is equipped with and the locking spiral shell The bottom end of the screw thread (521) that female (56) match, the inner shaft (52) is equipped with traveller (523), traveller (523) the sliding setting In the sliding slot (44), the middle part of the inner shaft (52) is equipped with shoulder block (522), receives and is formed in the bottom of the shoulder block (522) Convex shoulder (5221), the top surface of the convex shoulder (5221) are stop surface (5222), are set in institute at the top of the cylindrical spring (53) It states on convex shoulder (5221) and the top of the cylindrical spring (53) is kept out on the stop surface (5222), the inner shaft (52) Top pass through second via hole (12) and by the lock nut (56) fixation, synchronously, the top of the shoulder block (522) The top in the accommodating chamber (14) is kept out in face, and the bottom end of the inner shaft (52) is protruded into described across first via hole (5132) In cavity of resorption (511).

4. universal joint according to claim 3, which is characterized in that the inner shaft (52) is matched with the second via hole (12) It is combined into interference fit, the inner shaft (52) and matching for first via hole (5132) are combined into clearance fit.

5. universal joint according to claim 3, which is characterized in that the outer diameter of the cylindrical spring (53) is slightly less than the appearance Receive the internal diameters of chamber (14), the internal diameter of the cylindrical spring (53) is slightly larger than the diameter of the convex shoulder (5221).

6. universal joint according to claim 1, which is characterized in that the top outer diameter of the volute spring (54) is slightly less than institute State the internal diameter of cavity of resorption (511).

7. universal joint according to claim 3, which is characterized in that when the transmission shaft (4) is by external force in axial direction, The transmission shaft (4) squeezes the volute spring (54), and the sleeve (51) is by first via hole (5132) along described Inner shaft (52) sliding, exists between the second keyway (5121) and second spline (13) and radially slides, and the gasket (55) is squeezed The cylindrical spring (53) are pressed, synchronously, the gas in the cavity of resorption (511) and the epicoele (512) passes through the first ventilation hole (51421) it is outwardly vented or with the second ventilation hole (51441) from extraneous air-breathing.