CN101614247B

CN101614247B - Shock absorption structure on electric car coupler

Info

Publication number: CN101614247B
Application number: CN2009101045193A
Authority: CN
Inventors: 夏先明
Original assignee: Lifan Industry Group Co Ltd
Current assignee: Lifan Technology Group Co Ltd
Priority date: 2009-07-31
Filing date: 2009-07-31
Publication date: 2012-07-04
Anticipated expiration: 2029-07-31
Also published as: CN101614247A

Abstract

A shock absorption structure on an electric car coupler comprises a cylinder, an outer spring, a first piston, a second piston, an inner spring and an end closure, wherein the first piston is tubular structure; the open end of the first piston is sealed by the end closure; the closed end of the first piston is sheathed into the cylinder, opened with a small throttling hole, is internally provided with the second piston and the inner spring; one end of the inner spring is butted with the second piston and the other end is butted with the end closure; the cylinder and the first piston are sheathed with the outer spring; one end of the outer spring is spaced by the closed end of the cylinder and the other end is spaced by the closed end. The invention causes that the couple has the shock absorption function while transmitting torsion, can effectively absorb vibration energy generated during the working between an electrical motor and a speed changer, reduces the vibration of working conditions such as the starting, braking, anxious acceleration, anxious deceleration and the like, avoids the damage of components and parts caused by impaction, and is characterized by clever conception, simple and reliable structure, excellent shock absorption performance, etc.

Description

A kind of shock-damping structure that is used on the electric car coupler

Technical field

The present invention relates to a kind of shock-damping structure that is used on the electric car coupler of a kind of electric vehicle, be used to absorb the vibration energy that produces when working between motor and the speed changer.

Background technique

At present, new-energy automobile is becoming the exploitation of exploitation focus, particularly electric vehicle, has become the emphasis of new-energy automobile exploitation.Electric vehicle adopts motor as driving power assembly, and drive motor is connected with speed changer, if adopt simple rigid coupling, when operating modes such as vehicle launch, braking, anxious acceleration, anxious deceleration, is prone to produce vibrations, influences the performance of vehicle.Therefore, between motor and speed changer, need a kind of damping performance coupling excellent, that can effectively improve impact to come transmitting movement and torque.The tradition coupling is because the self structure restriction is difficult to reach usage requirement, and coupling self can't absorb the vibration energy that produces when working between motor and the speed changer, and the effect of improving vibrations is limited.

Summary of the invention

Technical problem to be solved by this invention is the shock-damping structure on a kind of coupling is provided, so that effectively absorb the vibration energy that produces when working between motor and the speed changer.

Technological scheme of the present invention is following: a kind of shock-damping structure that is used on the electric car coupler; Comprise oil cylinder, outer spring, first piston, second piston, inner spring and end cap; Wherein first piston is a tubular structure; The open-mouth end of this first piston is sealed by end cap, and the closed end of first piston is inserted in the oil cylinder, and on the closed end of first piston, offers throttling pore; Second piston and inner spring are set in said first piston; One end of inner spring and the second piston butt, the other end and end cap butt, suit outer spring on said oil cylinder and first piston; One end of this outer spring is spacing by the outer rim of oil cylinder closed end, and the other end is spacing by end cap.

In the corresponding containing space that is provided with, a plurality of the present invention evenly distribute on circumference on coupling driving disc and driven disc in integral installation of the present invention.The coupling driving disc is sleeved on through inner splined hole on the output shaft of drive motor, and the coupling driven disc is sleeved on the input shaft of speed changer through inner splined hole, and driving disc can turn an angle by relative driven disc.When motor operation, the output shaft of motor drives driving disc and rotates synchronously, because driving disc can turn an angle by relative driven disc; End cap and cylinder body suffer oppression like this, make the outer spring compression, and first piston is to the closed end motion of oil cylinder; In-oil cylinder fluid receives the compressing of first piston; Throttling pore through the first piston closed end flows in the first piston, and fluid promotes second piston to the motion of end cap direction, the inner spring compression.Because fluid gets in cylinder the process of first piston, fluid can absorb energy during through throttling pore, converts mechanical energy to heat energy, thereby can absorb the impulsive load of driving disc quick rotation, reaches damping effect well.When driving disc after driven disc rotates; The pressure that acts on end cap and the cylinder body disappears, and outer spring resets, and outer spring promotes end cap and cylinder body; Make first piston to direction motion away from the oil cylinder closed end; This moment, inner spring resetted, and promoted the direction motion of second piston to the oil cylinder closed end, and the fluid in the first piston is pushed back in the oil cylinder.

For simplified structure, convenient for assembly, the middle part of above-mentioned end cap has annular boss, and this annular boss stretches in the first piston, and is threaded with first piston.

For the ease of to the inner spring location, guarantee the reliability of inner spring work, above-mentioned second piston is a tubular structure, an end of said inner spring stretches into from the open-mouth end of second piston, in the annular boss that the other end inserting end of inner spring covers.

Beneficial effect: the invention enables coupling in transmitting torque, to have shock-absorbing function; Can effectively absorb the vibration energy that produces when working between electric vehicle motor and the speed changer; Vibrations when having reduced operating modes such as electric vehicle starting, braking, anxious acceleration, anxious deceleration; Avoided because of impact causes damage of components, have be skillfully constructed, characteristics such as simple and reliable for structure, damping performance excellence.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 is installed on the phase diagram on the coupling for the present invention.

Fig. 3 is the A-A sectional view of Fig. 2.

Embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is described further:

As shown in Figure 1, the present invention is made up of oil cylinder 1, outer spring 2, first piston 3, second piston 4, inner spring 5 and end cap 6, and wherein oil cylinder 1 is the uncovered tubular structure of the end sealing the other end, and the outer of this oil cylinder 1 closed end stretches out, and forms disk body.Said first piston 3 is a tubular structure, and the closed end of this first piston 3 stretches in the oil cylinder 1, and on the closed end of first piston 3, offers throttling pore 3a.The open-mouth end of said first piston 3 is set on the annular boss at end cap 6 middle parts, both screw-thread fit, and end cap 6 is with the open-mouth end sealing of first piston 3.Suit outer spring 2 on oil cylinder 1 and first piston 3, an end of this outer spring 2 is spacing by the disk body of oil cylinder 1 closed end outer rim, and the other end is spacing by end cap 6.Said second piston 4 is installed in the first piston 3 with inner spring 5; Second piston 4 is a tubular structure; Uncovered towards end cap 6, an end of inner spring 5 stretches into from the open-mouth end of second piston 4, and with second piston 4 the tube end butt; The other end of inner spring 5 stretches in the annular boss on the end cap 6, and is spacing by end cap 6.

Like Fig. 2, shown in Figure 3; Coupling driving disc 7 is sleeved on the output shaft of drive motor through inner splined hole; Coupling driven disc 8 is sleeved on the input shaft of speed changer through inner splined hole; The card of the card of driving disc 7 and driven disc 8 fits, and both shaft axiss are on same straight line, and the first annular boss 7a on the driving disc 7 and the second annular boss 8a on the driven disc 8 are respectively in the opposite direction.Platen 9 is sleeved on the root of the first annular boss 7a on the driving disc 7, and this platen 9 is fitted with the outer card of driving disc 7.Connect through equally distributed many rivets 10 on the circumference between said driving disc 7, driven disc 8 and platen 9 threes; And the hole that supplies rivet 10 to pass through on the driving disc 7 is an arc slot; The hole that supplies rivet 10 to pass through on driven disc 8 and the platen 9 is a circular hole, and driving disc 7 is driven disc 8 and platen 9 positive and negative turning an angle relatively.Offer a plurality ofly by the equally distributed through hole of circumference at the relative position of driving disc 7, driven disc 8 and platen 9, form the containing space 11 that damping device is installed, the present invention is assemblied in this containing space 11.

Working principle of the present invention is following:

When motor operation, the output shaft of motor drives driving disc 7 and rotates synchronously, because relative driven disc 8 of driving disc 7 abilities and platen 9 relatively rotate several angle; End cap 6 suffers oppression with cylinder body 1 like this, makes outer spring 2 compressions, and first piston 3 is to the closed end motion of oil cylinder 1; Fluid in the oil cylinder 1 receives the compressing of first piston 3; Throttling pore 3a through first piston 3 closed ends flows in the first piston 3, and fluid promotes second piston 4 to the motion of end cap 6 directions, inner spring 5 compressions.Because fluid gets in cylinder 1 process of first piston 3, fluid can absorb energy during through throttling pore 3a, converts mechanical energy to heat energy, thereby can absorb the impulsive load of driving disc 7 quick rotation, reaches damping effect well.When driving disc 7 after driven disc 8 rotates; The pressure that acts on end cap 6 and the cylinder body 1 disappears, and outer spring 2 resets, and outer spring 2 promotes end cap 6 and cylinder body 1; Make first piston 3 to direction motion away from oil cylinder 1 closed end; This moment, inner spring 5 resetted, and promoted the direction motion of second piston 4 to oil cylinder 1 closed end, and the fluid in the first piston 3 is pushed back in the oil cylinder.In like manner, when electric vehicle was braked, the impact that driven disc 8 transmits at first was delivered on end cap 6 and the cylinder body 1, makes inside and outside spring 5,2 compressions, power was delivered on the driving disc 7 after slowing down impact again.

Claims

1. shock-damping structure that is used on the electric car coupler; It is characterized in that: first piston (3) is a tubular structure; The open-mouth end of this first piston (3) is sealed by end cap (6); The closed end of first piston (3) is inserted in the oil cylinder (1), and on the closed end of first piston (3), offers throttling pore (3a); Second piston (4) and inner spring (5) are set in said first piston (3); One end of inner spring (5) and second piston (4) butt; The other end and end cap (6) butt; Go up suit outer spring (2) at said oil cylinder (1) and first piston (3), an end of this outer spring (2) is spacing by the outer rim of oil cylinder (1) closed end, and the other end is spacing by end cap (6).

2. a kind of shock-damping structure that is used on the electric car coupler according to claim 1 is characterized in that: the middle part of said end cap (6) has annular boss, and this annular boss stretches in the first piston (3), and is threaded with first piston (3).

3. a kind of shock-damping structure that is used on the electric car coupler according to claim 2; It is characterized in that: said second piston (4) is a tubular structure; One end of said inner spring (5) stretches into from the open-mouth end of second piston (4), and the other end of inner spring (5) stretches in the annular boss on the end cap (6).