阅读说明：本技术 一种新能源电机拉杆悬置及装配工装 (New forms of energy motor pull rod suspension and assembly fixture ) 是由 肖磊 李国洪 李承亮 刘鑫 罗金梁 邓浩 于 2021-09-06 设计创作，主要内容包括：本发明公开了一种新能源电机拉杆悬置及装配工装,涉及汽车配件技术领域,包括拉杆支架,该拉杆支架的支架尾部用于连接电机支架,拉杆支架的支架头部内设置有橡胶主簧以及设置在橡胶主簧中部的拉杆内芯,橡胶主簧的前端依次设置有第一限位间隙和第一限位凸台,橡胶主簧的后端依次设置有第二限位间隙和第二限位凸台；其特征在于：还包括限位软垫；拉杆内芯的后端设置有与限位软垫形状相适配的卡槽；第二限位间隙中部外扩形成用于容纳限位软垫的空腔,该空腔的前端延伸至拉杆内芯的卡槽内形成夹持随形面,用于防止限位软垫径向脱出；空腔的后端延伸至支架头部的内壁；限位软垫过盈设置在空腔内,橡胶主簧受压后与第一限位凸台接触。(The invention discloses a new energy motor pull rod suspension and assembly tool, which relates to the technical field of automobile accessories and comprises a pull rod support, wherein the support tail part of the pull rod support is used for connecting a motor support, a rubber main spring and a pull rod inner core arranged in the middle of the rubber main spring are arranged in the support head part of the pull rod support, a first limiting gap and a first limiting boss are sequentially arranged at the front end of the rubber main spring, and a second limiting gap and a second limiting boss are sequentially arranged at the rear end of the rubber main spring; the method is characterized in that: the utility model also comprises a limit cushion; the rear end of the pull rod inner core is provided with a clamping groove matched with the limiting cushion in shape; the middle part of the second limiting gap is expanded to form a cavity for accommodating the limiting cushion, and the front end of the cavity extends into the clamping groove of the pull rod inner core to form a clamping following surface for preventing the limiting cushion from radially falling out; the rear end of the cavity extends to the inner wall of the head part of the bracket; the limiting cushion is arranged in the cavity in an interference mode, and the rubber main spring is in contact with the first limiting boss after being pressed.)

1. A new energy motor pull rod suspension comprises a pull rod support (1), wherein a support tail (13) of the pull rod support (1) is used for being connected with a motor support (5), a rubber main spring (2) and a pull rod inner core (3) arranged in the middle of the rubber main spring (2) are arranged in a support head (11) of the pull rod support (1), a first limiting gap (21) and a first limiting boss (22) are sequentially arranged at the front end of the rubber main spring (2), and a second limiting gap (24) and a second limiting boss (25) are sequentially arranged at the rear end of the rubber main spring (2); the method is characterized in that: the utility model also comprises a limit cushion (4);

the rear end of the pull rod inner core (3) is provided with a clamping groove (32) matched with the limiting cushion (4) in shape;

the middle part of the second limiting gap (24) is expanded outwards to form a cavity (26) for accommodating the limiting cushion (4), and the front end of the cavity (26) extends into a clamping groove (32) of the pull rod inner core (3) to form a clamping following surface for preventing the limiting cushion (4) from being radially removed; the rear end of the cavity (26) extends to the inner wall of the bracket head (11);

spacing cushion (4) interference setting is in cavity (26), contact with first spacing boss (22) after rubber mainspring (2) pressurized.

2. The new energy motor tie rod suspension of claim 1, characterized in that: the middle part of the pull rod inner core (3) is provided with a through hole (35).

3. The new energy motor tie rod suspension of claim 2, characterized in that: and a positioning anti-rotation groove (36) is formed in the inner side wall of the through hole (35).

4. The new energy motor tie rod suspension of claim 1, characterized in that: the limit cushion (4) comprises a limit cushion framework (41) and limit main body rubber (43) which are connected; the clamping groove (32) is of an arc-shaped structure, and a limiting groove (33) matched with the limiting cushion framework (41) is formed in the inner wall of the clamping groove (32).

5. The new energy motor tie rod suspension of claim 4, characterized in that: the inner wall of the clamping groove (32) is provided with a plurality of force returning grooves (34) for improving the clamping force of the clamping groove (32).

6. The new energy motor tie rod suspension of claim 4, characterized in that: and positioning concave surfaces (44) matched with the clamping grooves (32) in shape are arranged on two sides of the limiting main body rubber (43).

7. The new energy motor tie rod suspension of claim 4, characterized in that: be provided with protruding muscle (27) in cavity (26), spacing cushion skeleton (41) surface is provided with recess (42) with protruding muscle (27) looks adaptation for prevent that spacing cushion (4) axial from deviating from.

8. The new energy motor tie rod suspension of claim 1, characterized in that: the front end of the pull rod inner core (3) is provided with a supporting head (31), and the first limiting boss (22) is provided with a following groove (23) matched with the supporting head (31).

9. The new energy motor tie rod suspension of claim 1, characterized in that: the pull rod support (1) is provided with a plurality of lightening holes (15), the support head (11) of the pull rod support (1) is provided with a mounting hole (12) for accommodating the rubber main spring (2), and the support tail (13) is provided with a connecting hole (14) for connecting the motor support (5).

10. An assembly fixture for suspension of a new energy motor pull rod according to any one of claims 1 to 9 is characterized in that: comprises an upper mounting plate (7) and a lower mounting plate (6) which are oppositely arranged; the bottom surface of the upper mounting plate (7) is provided with a pushing plate (72), a limiting guide post (73) and a press-fitting head (71), and the press-fitting head (71) is used for pressing the limiting cushion (4) into the cavity (26); the lower mounting plate (6) is provided with a positioning seat (61), a limiting guide sleeve (63) and a pushing block (62); the positioning seat (61) is used for horizontally placing the pull rod support (1), and a positioning shaft on the positioning seat (61) is inserted into the pull rod inner core (3); the limiting guide sleeve (63) is matched with the limiting guide post (73) and used for limiting the distance between the upper mounting plate (7) and the lower mounting plate (6); the pushing block (62) is matched with the pushing plate (72), the pushing block (62) is pressed to push the pull rod support (1) to translate while the pull rod inner core (3) is kept still along with the descending of the pushing plate (72), and the cavity (26) is pressed to be enlarged so as to be pressed into the limiting cushion (4).

Technical Field

The invention relates to the technical field of automobile accessories, in particular to a new energy motor pull rod suspension and assembly tool.

Background

For electric vehicles, the torque ripple of the electric machine is much lower than that of the fuel engine and occurs mainly in creep, acceleration, deceleration and braking conditions, and the frequency thereof is not obviously related to the engine rotation order. But the torque of the electric machine is significantly greater than that of the engine. Therefore, the suspension system firstly has enough torsion resistance and limiting capacity, ensures that the displacement of the power assembly is in a reasonable range under the action of large torque, and considers the vibration isolation performance on the basis. Therefore, the requirements of the electric automobile on torsion resistance and limiting capacity of the suspension system are far higher than those of the fuel vehicle.

At present, in the conventional draw bar suspension, for example, patent documents of a draw bar suspension structure (patent application No. 201821385096.8), a rear draw bar suspension of an automobile power assembly system (patent application No. 201320731911.2), and a novel gearbox rear draw bar suspension (patent application No. 201210218911.2), a gap is left between a main rubber spring and a limiting boss, so that an electric automobile can be frequently started and braked, the torque is large at the moment of starting and braking, the main rubber spring needs to contact the limiting boss after a gap distance, and thus, the limiting time is delayed, and the limit cannot be timely limited. Meanwhile, in the moment of contacting the limiting boss, larger impact can be caused, and the NVH effect is influenced.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a new energy motor pull rod suspension and assembly tool which has good torsion resistance and limiting functions and simultaneously has a good NVH (noise vibration and harshness) effect.

In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: a new energy motor pull rod suspension comprises a pull rod support, wherein the support tail part of the pull rod support is used for being connected with a motor support, a rubber main spring and a pull rod inner core arranged in the middle of the rubber main spring are arranged in the support head part of the pull rod support, a first limiting gap and a first limiting boss are sequentially arranged at the front end of the rubber main spring, and a second limiting gap and a second limiting boss are sequentially arranged at the rear end of the rubber main spring; the method is characterized in that: the utility model also comprises a limit cushion; the rear end of the pull rod inner core is provided with a clamping groove matched with the limiting cushion in shape; the middle part of the second limiting gap is expanded outwards to form a cavity for accommodating the limiting cushion, and the front end of the cavity extends into the clamping groove of the pull rod inner core to form a clamping following surface for preventing the limiting cushion from radially falling out; the rear end of the cavity extends to the inner wall of the head part of the bracket; the limiting cushion is arranged in the cavity in an interference mode, and the rubber main spring is in contact with the first limiting boss after being pressed.

The further improvement lies in that: the middle part of the pull rod inner core is provided with a through hole.

The further improvement lies in that: and the inner side wall of the through hole is provided with a positioning anti-rotation groove.

The further improvement lies in that: the limit cushion comprises a limit cushion framework and a limit rubber main body which are connected; the draw-in groove is the arc structure, and the inner wall of draw-in groove is provided with the spacing groove with spacing cushion skeleton looks adaptation.

The further improvement lies in that: the inner wall of the clamping groove is provided with a plurality of force returning grooves for improving the clamping force of the clamping groove.

The further improvement lies in that: and positioning concave surfaces matched with the shapes of the clamping grooves are arranged on two sides of the limiting cushion.

The further improvement lies in that: the cavity is internally provided with a convex rib, and the surface of the limit cushion framework is provided with a groove matched with the convex rib for preventing the limit cushion from axially dropping off.

The further improvement lies in that: the front end of the pull rod inner core is provided with a supporting head, and the first limiting boss is provided with a shape following groove matched with the supporting head.

The further improvement lies in that: the pull rod support is provided with a plurality of lightening holes, the head of the support of the pull rod support is provided with a mounting hole for accommodating the rubber main spring, and the tail of the support is provided with a connecting hole for connecting the motor support.

The invention also provides an assembly tool for suspending the new energy motor pull rod, which comprises an upper mounting plate and a lower mounting plate which are oppositely arranged; the bottom surface of the upper mounting plate is provided with a pushing plate, a limiting guide pillar and a press-fitting head, and the press-fitting head is used for pressing the limiting cushion into the cavity; the lower mounting plate is provided with a positioning seat, a limiting guide sleeve and a pushing block; the positioning seat is used for horizontally placing the pull rod support, and a positioning shaft on the positioning seat is inserted into the pull rod inner core; the limiting guide sleeve is matched with the limiting guide pillar and used for limiting the distance between the upper mounting plate and the lower mounting plate; the pushing block is matched with the pushing plate, the pushing block is pressed to push the pull rod support to translate along with the descending of the pushing plate, the inner core of the pull rod is kept still, and the cavity is pressed to be enlarged so as to facilitate the pressing in of the limiting cushion.

The invention has the beneficial effects that:

the invention is a pull rod suspension formed by assembling a limit cushion and a pull rod main body, after the limit cushion is pressed in the pull rod bracket main body, a rubber main spring is contacted with a first limit boss, so that no limit clearance exists between the front and the rear, and the limit can be well limited even under the impact of large torque at the moment of starting and braking of a motor. Meanwhile, due to the transition of the limiting cushion and the limiting boss, instant impact cannot be caused, and a good NVH (noise, vibration and harshness) effect is achieved.

The pull rod support is connected with the motor support, the pull rod inner core is connected with the frame, when the motor assembly twists, the motor support drives the pull rod support to twist, and the pull rod inner core is fixed at the moment, so that great torsional rigidity can be provided through rubber, and the torsional displacement of the motor assembly is limited.

Drawings

Fig. 1 is a schematic structural diagram of a new energy motor pull rod suspension in an embodiment of the invention;

FIG. 2 is a schematic structural view of a tie rod bracket according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a main rubber spring and a pull rod core according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic structural view of an inner core of a tie rod in an embodiment of the present invention;

FIG. 6 is a schematic structural view of a cushion according to an embodiment of the present invention;

FIG. 7 is a top view of a retaining bolster in an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of an assembly fixture in an embodiment of the present invention;

FIG. 9 is a schematic view of the upper mounting plate of FIG. 8 after moving downward;

FIG. 10 is a cross-sectional view of FIG. 9;

FIG. 11 is a top view of a lower mounting plate in an embodiment of the present invention.

Reference numerals:

1-a tie rod bracket; 11-a stent head; 12-mounting holes; 13-a stent tail; 14-connecting holes; 15-lightening holes;

2-rubber main spring; 21-a first limit gap; 22-a first limit boss; 23-a follower groove; 24-a second limit gap; 25-a second limit boss; 26-a cavity; 27-a rib;

3-a pull rod inner core; 31-a holding head; 32-card slot; 33-a limiting groove; 34-a force return groove; 35-a through hole; 36-positioning anti-rotation slots;

4-a limit cushion; 41-limit cushion framework; 42-a groove; 43-limiting main body rubber; 44-a positioning concave surface;

5-a motor bracket;

6-lower mounting plate; 61-positioning seat; 62-pushing the line block; 63-limiting guide sleeves;

7-mounting the plate; 71-a press-fitting head; 72-a push plate; 73-limit guide post.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout.

In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate that the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of the present invention.

The technical scheme and the beneficial effects of the invention are clearer and clearer by further describing the specific embodiment of the invention with the accompanying drawings of the specification. The embodiments described below are exemplary and are intended to be illustrative of the invention, but are not to be construed as limiting the invention.

Referring to fig. 1 and 3, an embodiment of the invention provides a new energy motor pull rod suspension, which includes a pull rod support 1, a support tail 13 of the pull rod support 1 is used for connecting a motor support 5, a support head 11 of the pull rod support 1 is internally provided with a rubber main spring 2 and a pull rod inner core 3 arranged in the middle of the rubber main spring 2, the front end of the rubber main spring 2 is sequentially provided with a first limiting gap 21 and a first limiting boss 22, and the rear end of the rubber main spring 2 is sequentially provided with a second limiting gap 24 and a second limiting boss 25; and also comprises a limit cushion 4.

Referring to fig. 1 and 5, a clamping groove 32 matched with the limiting cushion 4 in shape is arranged at the rear end of the pull rod inner core 3; specifically, the middle part of the pull rod inner core 3 is provided with a through hole 35. The inner side wall of the through hole 35 is provided with a positioning anti-rotation groove 36. The inner wall of the locking groove 32 is provided with a plurality of return grooves 34 for improving the clamping force of the locking groove 32. The front end of the pull rod inner core 3 is provided with a propping head 31, and the first limiting boss 22 is provided with a shape following groove 23 matched with the propping head 31. In this example, the tie rod inner core was extruded from a profile (material 6061-T6): the outline of the main spring determines the inner outline of the main spring, and a through hole for installation is arranged in the middle of the inner coreMeanwhile, a positioning anti-rotation structure, namely a semicircular groove with the diameter of R2.5mm is designed; the inner core is designed with an arc-shaped clamping groove structure for installing the limiting cushion. Preferably, the shape of the pull rod inner core can be adjusted according to the rigidity requirement, and the pull rod inner core can be in various structures such as a round structure, an oval structure and a trapezoid structure. The structure material of the pull rod inner core can be formed by profile extrusion, aluminum alloy casting, steel pipe and plastic, or steel pipe and aluminum alloy. The positioning and rotation-preventing structure of the pull rod inner core can be in a semicircular shape, and can also be in a rectangular shape, a U-shaped shape and other structures. The positioning rotation-preventing mechanism can also be cancelled. The arc-shaped clamping groove structure for installing the limit cushion designed by the inner core can be in other shapes, such as rectangle, wedge and the like.

Referring to fig. 3, 4 and 5, the middle part of the second limit gap 24 is expanded to form a cavity 26 for accommodating the limit cushion 4, and the front end of the cavity 26 extends into the clamping groove 32 of the pull rod inner core 3 to form a clamping following surface for preventing the limit cushion 4 from being radially removed; the rear end of the cavity 26 extends to the inner wall of the holder head 11; the main body structure of the rubber main spring determines the rigidity of the product; the assembly position of the rubber main spring and the limiting cushion is provided with a shape-following clamping groove structure, the width of the clamping groove structure is 29.7mm, and the limiting cushion is prevented from radially falling off; meanwhile, a convex rib with the width of 5mm is designed so as to be matched with a corresponding groove on the limiting cushion and prevent the limiting cushion from axially dropping out. In order to ensure that the pull rod main body is in interference fit with the limiting cushion, the radial size (27.9mm) of the position, corresponding to the limiting cushion, of the pull rod main body is smaller than the length (33mm) of the limiting cushion. Preferably, the limiting boss can be in any shape such as a trapezoid shape and a conical shape. The arc-shaped clamping groove structure for installing the limit cushion can be in other shapes, such as a rectangle, a wedge and the like. The rubber main spring is provided with a convex rib for preventing the limit cushion from falling off, and the convex rib can be rectangular or semicircular and other structures.

Referring to fig. 1, 6 and 7, the limit cushion 4 is arranged in the cavity 26 in an interference manner, and the rubber main spring 2 is pressed to contact with the first limit boss 22. Specifically, the limit cushion 4 comprises a limit cushion framework 41 and a limit main body rubber 43 which are connected; the clamping groove 32 is of an arc-shaped structure, and a limiting groove 33 matched with the limiting cushion framework 41 is formed in the inner wall of the clamping groove 32. Positioning concave surfaces 44 matched with the clamping grooves 32 in shape are arranged on two sides of the limiting main body rubber 43. The cavity 26 is internally provided with a convex rib 27, and the surface of the limit cushion framework 41 is provided with a groove 42 matched with the convex rib 27 for preventing the limit cushion 4 from axially dropping out. In this embodiment, the limit cushion is vulcanized by limit cushion skeleton and rubber and forms: the limiting cushion framework is rectangular, a cross-shaped groove is structurally designed, the width of the groove is 6mm, and the depth of the groove is 2.8 mm; the limit cushion framework is formed by injection molding, the material is PA66+ GF30, and the rubber part is of a waist-contracting type structure. Preferably, the rubber structure of the limit cushion 5 can be various structures such as a cone, a trapezoid and the like besides the waist-closing structure. The limit cushion framework can be made of plastic materials, aluminum alloy and steel materials. The cross groove on the limit cushion framework can be in other shapes and structures: such as grid type, "king" type, etc. The limit cushion can also be of a pure rubber structure without a framework.

Referring to fig. 1 and 2, the pull rod support 1 is provided with a plurality of lightening holes 15, a support head 11 of the pull rod support 1 is provided with a mounting hole 12 for accommodating the rubber main spring 2, and a support tail 13 is provided with a connecting hole 14 for connecting the motor support 5. In the embodiment, the pull rod support is formed by extrusion of sectional materials (materials 6061-T6), the head of the support is of a special-shaped structure which is the outline of a rubber main spring, the tail of the support is of a U-shaped structure, and the U-shaped interval is 47 mm; simultaneously designed with through holesAnd the screw hole M12 is convenient for the anti-torsion bracket of the post assembly connection motor, the U-shaped two sides can be designed into through holes, and the bracket connected with the motor through bolts and nuts is assembled. In order to ensure the thread strength, the thickness of the boss of the thread end bracket is designed to be 25.5 mm; besides the U-shaped structure, one end of the pull rod support can also be designed into various structures such as a rectangle and an ellipse, and the final purpose is to reserve a space for the assembled motor support. The pull rod support is provided with lightening holes which can be in various forms such as rectangle, circle, trapezoid and the like. The size of the through hole, the threaded hole and the U-shaped space of the bracket can be determined according to the actual sizeAdjustments are made as appropriate. The material design of the pull rod support is formed by extruding aluminum profiles, and can also be formed by casting aluminum alloys and forming steel pipes and stamping and welding metal plates.

The invention also provides an assembly tool for suspending the new energy motor pull rod, which comprises an upper mounting plate 7 and a lower mounting plate 6 which are oppositely arranged; the bottom surface of the upper mounting plate 7 is provided with a pushing plate 72, a limiting guide post 73 and a press-fitting head 71, and the press-fitting head 71 is used for pressing the limiting cushion 4 into the cavity 26; the lower mounting plate 6 is provided with a positioning seat 61, a limiting guide sleeve 63 and a pushing block 62; the positioning seat 61 is used for horizontally placing the pull rod support 1, and a positioning shaft on the positioning seat 61 is inserted into the pull rod inner core 3; the limiting guide sleeve 63 is matched with the limiting guide pillar 73 and used for limiting the distance between the upper mounting plate 7 and the lower mounting plate 6; the pushing block 62 is matched with the pushing plate 72, and along with the descending of the pushing plate 72, the pushing block 62 is pressed to push the pull rod support 1 to translate, meanwhile, the pull rod inner core 3 is kept still, and the cavity 26 is pressed to be enlarged so as to be convenient for the limiting cushion 4 to press in. Preferably, in order to increase the gap between the inner core and the pull rod bracket, the pull rod bracket can also be fixed to push the pull rod inner core. In addition, the pushing mechanism may be other than the pushing plate and the pushing block designed as described above: such as wedge-shaped structures, slider-guide mechanisms, etc.

The pull rod inner core is fixed by the positioning seat, and when the pushing plate moves downwards, the pushing block is driven to push the pull rod support, so that the gap between the inner core and the pull rod support is increased, and the assembly of the limiting cushion is facilitated. The press-fitting head presses the limiting cushion into the pull rod support main body, when the limiting guide pillar is in contact with the guide sleeve, the tool reaches a limiting state, and the limiting cushion is pressed in place at the moment.

In the description of the specification, reference to the description of "one embodiment", "preferably", "an example", "a specific example" or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention, and schematic representations of the terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.