A new energy motor tie rod suspension and assembly tool

Abstract

The invention discloses a new energy motor tie rod suspension and assembly tooling, which relates to the technical field of automobile accessories, including a tie rod bracket, the bracket tail of the tie rod bracket is used to connect the motor bracket, and a rubber main spring and a tie rod inner core arranged in the middle of the rubber main spring are arranged in the bracket head of the tie rod bracket, and the front end of the rubber main spring is sequentially provided with a first limit gap and a first limit boss, and the rear end of the rubber main spring is sequentially provided with a second limit gap and a second limit boss; it is characterized in that: it also includes a limit pad; the rear end of the tie rod inner core is provided with a card groove adapted to the shape of the limit pad; the middle part of the second limit gap is expanded outward to form a cavity for accommodating the limit pad, and the front end of the cavity extends to the card groove of the tie rod inner core to form a clamping conformal surface for preventing the limit pad from radially falling out; the rear end of the cavity extends to the inner wall of the bracket head; the limit pad is interference-arranged in the cavity, and the rubber main spring contacts the first limit boss after being compressed.

Description

Technical Field

[0001] The invention relates to the technical field of automobile accessories, in particular to a new energy motor tie rod suspension and assembly tool. Background Art

[0002] For electric vehicles, the torque fluctuation of the motor is much lower than that of the fuel engine, and it mainly occurs in creeping, acceleration, deceleration and braking conditions, and its frequency has no obvious correlation with the engine rotation order. However, the torque of the motor is significantly greater than that of the engine. Therefore, the suspension system should first have sufficient anti-torsion and limit capacity to ensure that the displacement of the powertrain is within a reasonable range under the action of large torque, and then consider the vibration isolation performance on this basis. Therefore, the requirements for the anti-torsion and limit capacity of the suspension system of electric vehicles are much higher than those of fuel vehicles.

[0003] At present, the traditional tie rod suspension, such as the patent documents "A tie rod suspension structure" (patent application number: 201821385096.8), "A rear tie rod suspension of an automobile powertrain system" (patent application number: 201320731911.2), "A new type of gearbox rear tie rod suspension" (patent application number: 201210218911.2), has a gap between the rubber main spring and the limit boss. Electric vehicles will start and brake frequently, and the torque is large at the moment of starting and braking. The rubber main spring needs to pass through a gap distance before contacting the limit boss. In this way, the limit time is extended and delayed, and it cannot be limited in time. At the same time, at the moment of contacting the limit boss, it will cause a large impact, affecting the NVH effect. Summary of the invention

[0004] In view of the defects existing in the prior art, the purpose of the present invention is to provide a new energy motor tie rod suspension and assembly tooling, which has good anti-torsion and limiting functions, and at the same time has good NVH effect.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a new energy motor tie rod suspension, including a tie rod bracket, the bracket tail of the tie rod bracket is used to connect the motor bracket, a rubber main spring and a tie rod inner core arranged in the middle of the rubber main spring are arranged in the bracket head of the tie rod bracket, the front end of the rubber main spring is sequentially provided with a first limit gap and a first limit boss, and the rear end of the rubber main spring is sequentially provided with a second limit gap and a second limit boss; it is characterized in that: it also includes a limit pad; the rear end of the tie rod inner core is provided with a card groove adapted to the shape of the limit pad; the middle part of the second limit gap expands outward to form a cavity for accommodating the limit pad, and the front end of the cavity extends to the card groove of the tie rod inner core to form a clamping conformal surface for preventing the limit pad from radially escaping; the rear end of the cavity extends to the inner wall of the bracket head; the limit pad is interference-arranged in the cavity, and the rubber main spring contacts the first limit boss after being compressed.

[0006] A further improvement is that a through hole is provided in the middle of the inner core of the pull rod.

[0007] A further improvement is that a positioning anti-rotation groove is provided on the inner side wall of the through hole.

[0008] A further improvement is that: the limiting cushion comprises a connected limiting cushion frame and a limiting rubber body; the clamping groove is an arc-shaped structure, and the inner wall of the clamping groove is provided with a limiting groove adapted to the limiting cushion frame.

[0009] A further improvement is that a plurality of force-return grooves are provided on the inner wall of the slot to increase the clamping force of the slot.

[0010] A further improvement is that positioning concave surfaces matching the shape of the card slot are provided on both sides of the limiting soft pad.

[0011] A further improvement is that a convex rib is arranged in the cavity, and a groove matching the convex rib is arranged on the surface of the limiting cushion skeleton to prevent the limiting cushion from axially falling out.

[0012] A further improvement is that the front end of the inner core of the pull rod is provided with a supporting head, and the first limiting boss is provided with a conformal groove matched with the supporting head.

[0013] A further improvement is that the tie rod bracket is provided with a plurality of weight-reducing holes, and the bracket head of the tie rod bracket has a mounting hole for accommodating the rubber main spring, and the bracket tail is provided with a connecting hole for connecting to the motor bracket.

[0014] The present invention also provides an assembly tool for the above-mentioned new energy motor tie rod suspension, comprising an upper mounting plate and a lower mounting plate arranged relatively to each other; the bottom surface of the upper mounting plate is provided with a pushing plate, a limiting guide column and a pressing head, and the pressing head is used to press 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 to horizontally place the tie rod bracket, and the positioning shaft on the positioning seat is inserted into the tie rod inner core; the limiting guide sleeve is adapted to the limiting guide column, and is used to limit the distance between the upper mounting plate and the lower mounting plate; the pushing block is adapted to the pushing plate, and as the pushing plate descends, the pushing block is pressed to push the tie rod bracket to translate while the tie rod inner core remains stationary, and the cavity is compressed and expanded to facilitate the pressing in of the limiting cushion.

[0015] The beneficial effects of the present invention are:

[0016] The present invention is a pull rod suspension assembled with a limit pad and a pull rod body. After the limit pad is pressed into the pull rod bracket body, the rubber main spring is already in contact with the first limit boss. In this way, there is no limit gap at the front and rear. When the motor is started or braked, it can be well limited even under the impact of a large torque. At the same time, because of the transition of the limit pad and the limit boss, no instantaneous impact will be caused, and a good NVH effect is achieved.

[0017] The tie rod bracket is connected to the motor bracket, and the tie rod inner core is connected to the vehicle frame. When the motor assembly twists, the motor bracket drives the tie rod bracket to twist, while the tie rod inner core is fixed at this time, and can provide great torsional stiffness through rubber to limit the torsional displacement of the motor assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the new energy motor tie rod suspension in an embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the tie rod bracket in an embodiment of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the rubber main spring and the inner core of the pull rod in the embodiment of the present invention;

[0021] Figure 4 for Figure 3 Sectional view along AA direction;

[0022] Figure 5 It is a schematic diagram of the structure of the inner core of the pull rod in an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the position limiting cushion in an embodiment of the present invention;

[0024] Figure 7 is a top view of the position limiting cushion in an embodiment of the present invention;

[0025] Figure 8 It is a structural schematic diagram of an assembly tool in an embodiment of the present invention;

[0026] Fig. 9 for Figure 8 Schematic diagram of the structure after the middle and upper mounting plate is moved down;

[0027] Fig.10 for Fig. 9 A cross-sectional view of

[0028] Fig.11 1 is a top view of the lower mounting plate in an embodiment of the present invention.

[0029] Reference numerals:

[0030] 1-tie rod bracket; 11-bracket head; 12-mounting hole; 13-bracket tail; 14-connection hole; 15-weight reduction hole;

[0031] 2- rubber main spring; 21- first limiting gap; 22- first limiting boss; 23- conformal groove; 24- second limiting gap; 25- second limiting boss; 26- cavity; 27- convex rib;

[0032] 3-pull rod inner core; 31-holding head; 32-slot; 33-limiting slot; 34-return slot; 35-through hole; 36-positioning anti-rotation slot;

[0033] 4-limiting cushion; 41-limiting cushion frame; 42-groove; 43-limiting main body rubber; 44-positioning concave surface;

[0034] 5-Motor bracket;

[0035] 6-lower mounting plate; 61-positioning seat; 62-promoting block; 63-limiting guide sleeve;

[0036] 7-upper mounting plate; 71-pressing head; 72-pushing plate; 73-limiting guide column. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0038] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.

[0039] The following is a further description of the specific embodiments of the present invention in conjunction with the drawings of the specification, so that the technical solution and its beneficial effects of the present invention are clearer and more explicit. The following description of the embodiments with reference to the drawings is exemplary and intended to explain the present invention, but cannot be understood as limiting the present invention.

[0040] See also Figure 1 and Figure 3As shown, an embodiment of the present invention provides a new energy motor tie rod suspension, including a tie rod bracket 1, a bracket tail 13 of the tie rod bracket 1 is used to connect the motor bracket 5, a rubber main spring 2 and a tie rod inner core 3 arranged in the middle of the rubber main spring 2 are arranged in the bracket head 11 of the tie rod bracket 1, a first limiting gap 21 and a first limiting boss 22 are arranged in sequence at the front end of the rubber main spring 2, and a second limiting gap 24 and a second limiting boss 25 are arranged in sequence at the rear end of the rubber main spring 2; and a limiting cushion 4 is also included.

[0041] See also Figure 1 and Figure 5 As shown, the rear end of the pull rod core 3 is provided with a slot 32 that matches the shape of the limiting cushion 4; specifically, a through hole 35 is provided in the middle of the pull rod core 3. The inner side wall of the through hole 35 is provided with a positioning anti-rotation groove 36. The inner wall of the slot 32 is provided with a plurality of rebound grooves 34, which are used to increase the clamping force of the slot 32. The front end of the pull rod core 3 has a supporting head 31, and the first limiting boss 22 is provided with a conformal groove 23 that matches the supporting head 31. In this embodiment, the pull rod core is formed by profile extrusion (material 6061-T6): the outer contour determines the inner contour of the rubber main spring, and there is a through hole in the middle of the inner core for installation. At the same time, a positioning anti-rotation structure—a semicircular groove of R2.5mm is designed; the inner core is designed with an arc-shaped slot structure for installing a limiting cushion. Preferably, the shape of the inner core of the pull rod can be adjusted according to the stiffness requirements, and can be various structures such as circular, elliptical, trapezoidal, etc. The structural material of the inner core of the pull rod can be profile extrusion molding, or aluminum alloy casting molding, or a combination of steel pipe and plastic, steel pipe and aluminum alloy. The positioning anti-rotation structure of the inner core of the pull rod can be semicircular, rectangular, U-shaped, etc. The positioning anti-rotation mechanism can also be cancelled. The arc-shaped slot structure for installing the limiting cushion designed in the inner core can be other shapes, such as rectangular, wedge-shaped, etc.

[0042] See also Figure 3 , Figure 4 and Figure 5As shown, the middle part of the second limiting gap 24 expands outward to form a cavity 26 for accommodating the limiting cushion 4. The front end of the cavity 26 extends to the slot 32 of the inner core 3 of the pull rod to form a clamping conformal surface to prevent the limiting cushion 4 from radially slipping out; the rear end of the cavity 26 extends to the inner wall of the bracket head 11; the main 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 designed with a conformal slot structure with a width of 29.7mm to prevent the limiting cushion from radially slipping out; at the same time, a 5mm wide convex rib is designed to cooperate with the corresponding groove on the limiting cushion to prevent the limiting cushion from axially slipping out. In order to ensure that the pull rod body and the limiting cushion are interference fit, the radial dimension (27.9mm) of the corresponding position of the pull rod body and the limiting cushion is smaller than the length (33mm) of the limiting cushion. Preferably, the limiting boss can be any shape such as a trapezoid or a cone. The arc-shaped slot structure for installing the limit pad can be in other shapes, such as rectangular, wedge-shaped, etc. The rubber main spring is designed with convex ribs to prevent the limit pad from falling off, and the convex ribs can be rectangular, semicircular or other structures.

[0043] See also Figure 1 , Figure 6 and Figure 7 As shown, the limiting cushion 4 is interference-set in the cavity 26, and the rubber main spring 2 contacts the first limiting boss 22 after being compressed. Specifically, the limiting cushion 4 includes a connected limiting cushion frame 41 and a limiting main rubber 43; the slot 32 is an arc-shaped structure, and the inner wall of the slot 32 is provided with a limiting groove 33 adapted to the limiting cushion frame 41. Positioning concave surfaces 44 adapted to the shape of the slot 32 are provided on both sides of the limiting main rubber 43. A convex rib 27 is provided in the cavity 26, and a groove 42 adapted to the convex rib 27 is provided on the surface of the limiting cushion frame 41 to prevent the limiting cushion 4 from axially disengaging. In this embodiment, the limiting cushion is formed by vulcanizing a limiting cushion skeleton and rubber: the limiting cushion skeleton is rectangular in shape, and is structurally designed with a cross-shaped groove, the groove width is 6mm, and the depth is 2.8mm; the limiting cushion skeleton is formed by injection molding, and the material is PA66+GF30, and the rubber part is a waist-type structure. Preferably, 5. In addition to the waist structure, the rubber structure of the limiting cushion can also be a conical, trapezoidal and other structures. The limiting cushion skeleton can be made of plastic, aluminum alloy or steel. The cross groove on the limiting cushion skeleton can also be other shape structures: for example, a grid type, a "king" shape, etc. The limiting cushion can also be a pure rubber structure without a skeleton.

[0044] See also Figure 1 and Figure 2As shown, the tie rod bracket 1 is provided with a plurality of weight-reducing holes 15, and the bracket head 11 of the tie rod bracket 1 has a mounting hole 12 for accommodating the rubber main spring 2, and the bracket tail 13 is provided with a connecting hole 14 for connecting the motor bracket 5. In this embodiment, the tie rod bracket is formed by extrusion of a profile (material 6061-T6), the bracket head is a special-shaped structure, which is the outer contour of the rubber main spring, the bracket tail is a U-shaped structure, and the U-shaped spacing is 47mm; at the same time, a through hole is designed And threaded holes M12, to facilitate the later assembly of the torsion-resistant bracket connected to the motor. Both sides of the U-shape can also be designed as through holes, and assembled with the bracket connected to the motor through bolts and nuts. In order to ensure the strength of the thread, the thickness of the boss of the threaded end bracket is designed to be 25.5mm; in addition to the U-shaped structure, one end of the tie rod bracket can also be designed as a rectangular, elliptical and other structures. The ultimate goal is to leave space for the assembled motor bracket. The tie rod bracket is designed with weight-reducing holes, which can be rectangular, circular, trapezoidal and other forms. The through holes, threaded holes and U-shaped spacing of the bracket can be adjusted according to actual conditions. The material design of the tie rod bracket is aluminum profile extrusion molding, and it can also be other structural forms such as aluminum alloy casting molding, steel pipe plus sheet metal punching and welding molding.

[0045] The present invention also provides an assembly tool for the above-mentioned new energy motor tie rod suspension, including an upper mounting plate 7 and a lower mounting plate 6 arranged relatively; the bottom surface of the upper mounting plate 7 is provided with a push plate 72, a limit guide column 73 and a press head 71, and the press head 71 is used to press the limit cushion 4 into the cavity 26; the lower mounting plate 6 is provided with a positioning seat 61, a limit guide sleeve 63 and a push block 62; the positioning seat 61 is used to horizontally place the tie rod bracket 1, and the positioning shaft on the positioning seat 61 is inserted into the tie rod inner core 3; the limit guide sleeve 63 is adapted to the limit guide column 73, and is used to limit the distance between the upper mounting plate 7 and the lower mounting plate 6; the push block 62 is adapted to the push plate 72, and as the push plate 72 descends, the push block 62 is pressed to push the tie rod bracket 1 to move in parallel while the tie rod inner core 3 remains stationary, and the cavity 26 is pressed to expand to facilitate the pressing of the limit cushion 4. Preferably, in order to increase the gap between the inner core and the tie rod bracket, the tie rod bracket can also be fixed to push the tie rod inner core. In addition, the pushing mechanism may be other pushing mechanisms besides the pushing plate and pushing block of the above-mentioned design, such as a wedge-shaped structure, a slider guide mechanism, etc.

[0046] The positioning seat fixes the inner core of the tie rod, and when the push plate moves downward, it drives the push block to push the tie rod bracket, increasing the gap between the inner core and the tie rod bracket, which is convenient for the assembly of the limit pad. The press head presses the limit pad into the main body of the tie rod bracket. When the limit guide column contacts the guide sleeve, the tooling reaches the limit state, and the limit pad is pressed into place.

[0047] In the description of the specification, the description with reference to the terms "one embodiment", "preferably", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention, and the schematic expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0048] The present invention is not limited to the above-mentioned embodiments. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A new energy motor tie rod suspension, comprising a tie rod bracket (1), a bracket tail (13) of the tie rod bracket (1) being used to connect a motor bracket (5), a rubber main spring (2) and a tie rod inner core (3) arranged in the middle of the rubber main spring (2) being arranged in the bracket head (11) of the tie rod bracket (1), a first limiting gap (21) and a first limiting boss (22) being arranged in sequence at the front end of the rubber main spring (2), and a second limiting gap (24) and a second limiting boss (25) being arranged in sequence at the rear end of the rubber main spring (2); characterized in that: It also includes a limit cushion (4); The rear end of the pull rod inner core (3) is provided with a slot (32) matching the shape of the limiting cushion (4); The middle part of the second limiting gap (24) is expanded outward to form a cavity (26) for accommodating the limiting cushion (4); the front end of the cavity (26) extends into the slot (32) of the inner core of the pull rod (3) to form a clamping conformal surface for preventing the limiting cushion (4) from radially escaping; the rear end of the cavity (26) extends to the inner wall of the bracket head (11); The limiting soft pad (4) is interference-set in the cavity (26), and the rubber main spring (2) contacts the first limiting boss (22) after being compressed.

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

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

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

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

6. The new energy motor tie rod suspension according to claim 4 is characterized in that: Positioning concave surfaces (44) matching the shape of the clamping groove (32) are arranged on both sides of the limiting main rubber body (43).

7. The new energy motor tie rod suspension according to claim 4 is characterized in that: A convex rib (27) is provided in the cavity (26), and a groove (42) matching the convex rib (27) is provided on the surface of the position-limiting cushion frame (41) to prevent the position-limiting cushion (4) from axially falling out.

8. The new energy motor tie rod suspension according to claim 1 is 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 conformal groove (23) matched with the supporting head (31).

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

10. An assembly tool for the new energy motor tie rod suspension according to any one of claims 1 to 9, characterized in that: The invention comprises an upper mounting plate (7) and a lower mounting plate (6) which are arranged opposite to each other; the bottom surface of the upper mounting plate (7) is provided with a pushing plate (72), a limiting guide column (73) and a pressing head (71), and the pressing head (71) is used to press 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 to place the pull rod bracket (1) horizontally, and ... The positioning shaft on the seat (61) is inserted into the inner core (3) of the pull rod; the limiting guide sleeve (63) is matched with the limiting guide column (73) and is used to limit 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). As the pushing plate (72) descends, the pushing block (62) is pressed to push the pull rod bracket (1) to move in parallel while the inner core (3) of the pull rod remains stationary, and the cavity (26) is compressed and expanded to facilitate the pressing in of the limiting cushion (4).

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