CN210555356U

CN210555356U - Rear frame and electric vehicle

Info

Publication number: CN210555356U
Application number: CN201921095566.1U
Authority: CN
Inventors: 孙延华
Original assignee: Tianjin V Danci Technology Co ltd
Current assignee: Tianjin V Danci Technology Co ltd
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2020-05-19
Anticipated expiration: 2029-07-12

Abstract

The utility model provides a back frame and electric motor car relates to electric motor car technical field. The rear frame comprises a connecting arm and two supporting arms, wherein the first ends of the two supporting arms are connected with the connecting arm, an accommodating space is formed between the two supporting arms, and the second ends of the two supporting arms are used for being correspondingly connected with the two ends of a rear wheel axle one by one; the connecting arm and the supporting arm are integrally formed. The electric vehicle comprises a front frame, a rear wheel and the rear frame, wherein a connecting arm of the rear frame is fixedly connected with the front frame; the rear wheel is pivoted with a wheel shaft, two ends of the wheel shaft respectively extend out of two sides of the rear wheel, and second ends of two supporting arms of the rear frame are fixedly connected with two ends of the wheel shaft in a one-to-one correspondence mode. This linking arm and two support arm integrated into one piece of back frame, processing is simple, with low costs, and the firm in connection degree between linking arm and the support arm is higher, corresponds better to the support stability of back wheel.

Description

Rear frame and electric vehicle

Technical Field

The utility model relates to an electric motor car technical field especially relates to a back frame and electric motor car.

Background

The electric vehicle is an electric drive vehicle which depends on a storage battery as an energy source, electric energy is converted into mechanical energy of the electric vehicle through a controller, a motor and the like to move, and the speed of the electric vehicle is controlled by controlling the current. After the electric vehicle is sold, the electric vehicle is widely popular with people due to the characteristics of high speed, small volume, labor saving and the like.

The electric vehicle generally comprises a handlebar, a front wheel, a rear wheel and a frame, wherein the frame comprises a front frame used for connecting the front wheel and a rear frame used for connecting the rear wheel, the conventional rear frame is generally formed by welding tubular sectional materials, and the electric vehicle is complex in process, high in cost and poor in stability.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a back frame and electric motor car to solve the current back frame that exists among the prior art and generally adopt pipy section bar welding to form, loaded down with trivial details, with high costs and the poor stability's of technology problem.

The utility model provides a rear frame, which comprises a connecting arm and two supporting arms, wherein the first ends of the two supporting arms are both connected with the connecting arm, a containing space is formed between the two supporting arms, and the second ends of the two supporting arms are used for being connected with two ends of a rear wheel axle in a one-to-one correspondence manner; the connecting arm and the supporting arm are integrally formed.

Furthermore, the connecting arm with the support arm is the plate body structure, two the face of support arm sets up in opposite directions, and about the connecting arm symmetry.

Furthermore, the supporting arm is provided with a reinforcing hole.

Furthermore, the supporting arm is a triangular plate body, one side edge of the supporting arm is used as a connecting edge to be connected with the connecting arm, and a corner opposite to the connecting edge is used for being connected with a wheel axle.

Furthermore, the support arm is a right-angled triangle plate body, one of the right-angled sides of the support arm is connected with the connecting arm as a connecting side, and the oblique side is located at the top of the support arm.

Furthermore, a strip-shaped wheel shaft groove is formed in the supporting arm, and one end of the wheel shaft groove is opened.

Another object of the present invention is to provide an electric vehicle, which comprises a front frame, a rear wheel and the rear frame, wherein the connecting arm of the rear frame is fixedly connected to the front frame; the rear wheel is pivoted with a wheel shaft, two ends of the wheel shaft respectively extend out of two sides of the rear wheel, and second ends of the two support arms of the rear frame are fixedly connected with two ends of the wheel shaft in a one-to-one correspondence mode.

Furthermore, the support device also comprises a rear seat, wherein a first lug is arranged on the top surface of the support arm, and a first support rod is connected between the first lug and the rear seat.

Furthermore, a second lug is arranged on the top surface of the supporting arm, and a brake is mounted on the second lug.

The support arm is provided with a fixing hole, the fender is fixedly connected with a second support rod, and the bottom end of the second support rod is connected with the support arm through the fixing hole.

The utility model discloses the beneficial effect of back frame and electric motor car does:

the utility model provides a rear frame and electric motor car, wherein, the rear frame includes the linking arm that is used for being connected with the electric motor car front frame and the support arm that is used for supporting the rear wheel, and two support arms support the both sides position of rear wheel respectively; the electric vehicle comprises a front frame used for supporting the front wheels, rear wheels used for driving the electric vehicle to move forward or backward in a rotating mode and the rear frame used for supporting the rear wheels, a connecting arm of the rear frame is connected with the front frame to jointly form a frame body of the electric vehicle, the rear wheels are supported at supporting ends of two supporting arms of the rear frame, and part of wheels of the rear wheels are located in an accommodating space between the two supporting arms.

During the installation, with the detachable fixed connection of linking arm and the preceding frame of back frame, insert the accommodation space between two support arms of back wheel with the back wheel along its radial direction, back wheel central point department has the shaft, and the both ends of shaft respectively with the support end one-to-one fixed connection of two support arms, when the electric motor car went, the back wheel rotated around the shaft under the supporting role of back frame to drive the whole forward of electric motor car. The two supporting arms of the rear frame support the two sides of the rear wheel at the same time, and the supporting stability is strong, so that the situation that the strength requirement of the single-side support on the rear frame is high and the supporting stability is poor is reduced; in addition, the linking arm and two support arms integrated into one piece of back frame, processing is simple, with low costs, and the firm in connection degree between linking arm and the support arm is higher, corresponds better to the support stability of back wheel.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a first structure of a rear frame according to an embodiment of the present invention, in which two support arms are parallel to each other;

fig. 2 is a schematic view of a first structure of the rear frame provided in the embodiment of the present invention, wherein two supporting arms are disposed at an angle.

Icon: 1-a linker arm; 2-a support arm; 21-reinforcement holes; 22-axle grooves; 24-a fixation hole; 3-an accommodation space; 4-a first lug; 41-a first connection hole; 5-a second lug; 51-second connection hole.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment provides a rear frame, as shown in fig. 1 and 2, which includes a connecting arm 1 and two supporting arms 2, wherein first ends of the two supporting arms 2 are both connected to the connecting arm 1, an accommodating space 3 is formed between the two supporting arms 2, and second ends of the two supporting arms 2 are used for being connected to two ends of a rear wheel axle in a one-to-one correspondence manner; the connecting arm 1 is integrally formed with the support arm 2.

The embodiment also provides an electric vehicle which comprises a front frame, a rear wheel and the rear frame, wherein the connecting arm 1 of the rear frame is fixedly connected with the front frame; the rear wheel is pivoted with a wheel shaft, two ends of the wheel shaft respectively extend out of two sides of the rear wheel, and second ends of two supporting arms 2 of the rear frame are fixedly connected with two ends of the wheel shaft in a one-to-one correspondence mode.

The rear frame comprises a connecting arm 1 used for being connected with a front frame of the electric vehicle and supporting arms 2 used for supporting rear wheels, and the two supporting arms 2 respectively support two side positions of the rear wheels; the electric vehicle comprises a front frame used for supporting the front wheels, rear wheels used for driving the electric vehicle to move forward or backward in a rotating mode and the rear frame used for supporting the rear wheels, a connecting arm 1 of the rear frame is connected with the front frame to jointly form a frame body of the electric vehicle, the rear wheels are supported at the supporting ends of two supporting arms 2 of the rear frame, and part of wheels of the rear wheels are located in an accommodating space 3 between the two supporting arms 2.

During the installation, with linking arm 1 and the detachable fixed connection of preceding frame of back frame, insert the accommodation space 3 between two support arms 2 of back wheel with the back wheel along its radial direction, the pivot of back wheel central point department has the shaft, and the both ends of shaft respectively with the support end one-to-one fixed connection of two support arms 2, when the electric motor car went, the back wheel rotated around the shaft under the supporting role of back frame to drive the whole forward of electric motor car. The two supporting arms 2 of the rear frame support the two sides of the rear wheel at the same time, so that the supporting stability is high, and the situations that the strength requirement of the rear frame is high due to single-side supporting and the supporting stability is poor are reduced; in addition, the connecting arm 1 and two support arms 2 integrated into one piece of back frame, processing is simple, with low costs, and the firm in connection degree between connecting arm 1 and the support arm 2 is higher, corresponds better to the support stability of back wheel.

Specifically, the linking arm 1 and the support arm 2 of back frame can be made through the casting, also can be for the sheet metal component who obtains through the processing of buckling to the both ends of plate body, and it is convenient to process, and is with low costs, and the bulk strength and the stability of back frame are better.

In this embodiment, the rear frame may be made of stainless steel. The stainless steel has good strength and corrosion resistance, and the rear frame manufactured by processing the stainless steel material has good strength and corrosion resistance.

In this embodiment, the rear frame can also be made of aluminum alloy material. The aluminum alloy has the characteristics of good strength and corrosion resistance, small density and light weight, and the rear saddle is made of the aluminum alloy material, so that the operations of transportation, installation, disassembly and the like are facilitated on the basis of realizing the supporting function.

Specifically, the connecting arm 1 and the front frame can be connected through a bolt, so that the assembly, disassembly and maintenance of the rear frame are facilitated, the flexible and detachable structure is beneficial to processing and production, and the production efficiency is improved; when the rear frame needs to be disassembled, the nut is screwed off, and the bolt is pulled out; in addition, the connecting arm 1 and the front frame can be connected in a welding or riveting mode.

In this embodiment, linking arm 1 and support arm 2 can be the plate body structure, and the face of two support arms 2 sets up in opposite directions, and about 1 symmetry of linking arm. This is a concrete form of back frame, support arm 2 that two faces set up in opposite directions supports the back wheel through the shaft, the plate body transmission of support arm 2 is followed to effort between shaft and the support arm 2, compare shaft-like support arm 2, the volume of 2 transmission efforts of support arm of plate structure is bigger, the support effort size of support arm 2 is the same, the effort that plate structure support arm 2's plate body everywhere received is less, the probability that corresponding deformation or buckle takes place reduces, thereby further improve the support stability of back frame to the back wheel.

Specifically, the angle between the connecting arm 1 and the supporting arms 2 can be adjusted according to the length of the wheel axle, so that the distance between the supporting ends of the two supporting arms 2 is matched with the length of the wheel axle; as shown in fig. 1, the angle between the support arm 2 and the connecting arm 1 is 90 °, the two support arms 2 are arranged in parallel, and the distance between the support ends of the two support arms 2 is approximately equal to the width of the connecting arm 1; as shown in fig. 2, the angle between the support arms 2 and the connecting arm 1 is greater than 90 °, and the distance between the support ends of the two support arms 2 is greater than the width of the connecting arm 1. Similarly, the length of the support arm 2 determines the size of the receiving space 3, and the support arm 2 having an appropriate length can be selected according to the size of the rear wheel.

In this embodiment, as shown in fig. 1 and 2, a reinforcing hole 21 may be provided in the support arm 2. The plate body of the supporting arm 2 is provided with the reinforcing holes 21 corresponding to the shape of the plate body, so that on one hand, the strength of the plate body can be enhanced, and the strength of the rear frame and the supporting stability of the rear frame to a rear wheel are further improved; on the other hand, the weight of the supporting arm 2 can be reduced, subsequent transportation, installation, disassembly and other operations are facilitated, materials can be saved, and cost is further reduced.

Specifically, as shown in fig. 1 and 2, the corners of the reinforcing holes 21 may be rounded to reduce the occurrence of the supporting situation of the supporting arm 2 due to cracks caused by stress concentration at the corners when the supporting arm 2 is stressed.

In this embodiment, the supporting arm 2 may be a triangular plate, one side of which is connected to the connecting arm 1 as a connecting side, and a corner opposite to the connecting side is used for connecting to the wheel axle. The concrete shape of support arm 2 here, when the back frame supported the rear wheel, the shaft transmitted the effort to support arm 2 through the angle of being connected with it, and the effort is radial after that and transmits to its connection limit through the plate body of support arm 2, and the length of connecting the limit is great, can disperse the effort of undertaking, under the same supporting action, reduces the effort intensity that support arm 2 received, reduces the emergence of the support arm 2 atress deformation condition.

Specifically, in this embodiment, as shown in fig. 1 and fig. 2, the support arm 2 may be a right-angled triangular plate, one of the right-angled sides of the support arm 2 is connected to the connecting arm 1 as a connecting side, and the oblique side is located at the top of the support arm 2.

In this embodiment, a strip-shaped axle slot 22 may be formed on the support arm 2, and one end of the axle slot 22 is open. When the wheel axle is connected with the supporting arm 2, the wheel axle can be inserted into the wheel axle groove 22 from one end of the opening of the wheel axle groove 22, then the wheel axle is moved to the installation position along the length direction of the wheel axle groove 22, and the wheel axle is fixed on the supporting arm 2 of the rear frame through an end cover or a step and the like; alternatively, the axle may be directly inserted into the mounting position of the axle groove 22, and the axle may be fixed to the support arm 2 of the rear frame by an end cap, a step, or the like.

Specifically, the tip of shaft can the rigid coupling have the end cover, is equipped with annular boss along its circumference on the shaft, forms annular clamping groove between boss and the end cover, and annular clamping groove's width and support arm 2's plate body thickness phase-match, and end cover and boss then prescribe a limit to the shaft, fix the shaft on support arm 2.

In this embodiment, the electric vehicle may further include a rear seat, the top surface of the support arm 2 is provided with a first lug 4, and a first support rod is connected between the first lug 4 and the rear seat. Firstly, the rear frame supports the rear seat through the first support rod, and the rear seat can be used for carrying people or other articles, so that the usability of the electric vehicle is improved; secondly, set up first lug 4 on the top surface of support arm 2, support arm 2 is connected with first bracing piece through first lug 4 to reduce that first bracing piece is direct to be connected with support arm 2, need punch to support arm 2 etc. the operation causes destruction to support arm 2's intensity, reduces the emergence of its support stability condition.

Specifically, two first supporting rods can be connected to the first lug 4, the top ends of the two first supporting rods are connected with different positions of the rear seat, so that different positions of the rear seat are supported, the supporting stability of the rear seat by the rear frame is improved, and the situation that the rear seat is stressed to deviate or shake is reduced. A first connecting hole 41 can be formed in the first lug 4, a through hole is correspondingly formed in the bottom end of the first supporting rod, and the first supporting rod is fixed on the first lug 4 by sequentially penetrating through the first connecting hole 41 and the through hole by using a threaded fastener; when the rear seat needs to be maintained or replaced, only the threaded fastener needs to be disassembled, and the rear seat is taken down.

In this embodiment, a second lug 5 may be further provided on the top surface of the support arm 2, and a brake is mounted on the second lug 5. The brake is used for braking the rear wheel, is one of the important parts of the electric vehicle, is arranged on the second lug 5 on the supporting arm 2, and can reduce the damage to the strength of the supporting arm 2 caused by directly arranging the brake on the supporting arm 2 on the basis of realizing the braking function of the brake, and correspondingly ensures the supporting strength of the supporting arm 2.

Specifically, a second connecting hole 51 may be provided on the second lug 5, and the brake may be connected to the second lug 5 through the second connecting hole 51 using a threaded fastener.

In this embodiment, the electric vehicle may further include a mudguard, the support arm 2 is provided with a fixing hole 24, the mudguard is fixedly connected with a second support rod, and the bottom end of the second support rod is connected to the support arm 2 through the fixing hole 24. The mudguard is supported above the rear wheel through the second support rod, and a gap with a certain height is formed between the mudguard and the top of the rear wheel so as to ensure the free rotation of the rear wheel; through water hole or muddy highway section time, the muddy water adhesion is on the rear wheel and along with the rear wheel rotates forward, when muddy water rotates to fender position department, the fender can effectively block muddy water and get rid of outward to reduce muddy water and splash and ride passerby's on one's body and cause the emergence of the pollution condition to its clothing etc. thus effectively improve the use comfort of electric motor car.

In particular, a boss structure may be outwardly protruded on the support arm 2, and the fixing hole 24 is provided on the boss structure. The setting of boss structure can effectively strengthen the intensity of this regional plate body, and on boss structure was located to fixed orifices 24, on the basis that realization support arm 2 and second bracing piece were connected, the fixed orifices that can significantly reduce was seted up the department atress and is taken place the condition such as fracture to ensure the supporting role of support arm. The second bracing piece also can be two, and the bottom of two second bracing pieces is passed through fixed orifices 24 and is connected with support arm 2, and its top is connected with the different positions of fender respectively to support the different positions of fender, improve the support stability to fender, reduce the fender and rock the emergence of the condition of even falling down.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. The rear frame is characterized by comprising a connecting arm (1) and two supporting arms (2), wherein first ends of the two supporting arms (2) are connected with the connecting arm (1), an accommodating space (3) is formed between the two supporting arms (2), and second ends of the two supporting arms (2) are used for being correspondingly connected with two ends of a rear wheel axle one by one; the connecting arm (1) and the supporting arm (2) are integrally formed.

2. Rear frame according to claim 1, characterized in that the connecting arm (1) and the supporting arms (2) are both of plate construction, the plate surfaces of the two supporting arms (2) being arranged opposite and symmetrical with respect to the connecting arm (1).

3. Rear frame according to claim 2, characterized in that the support arm (2) is provided with a reinforcement hole (21).

4. Rear frame according to claim 3, characterized in that the support arm (2) is a triangular plate, one of the sides being connected to the connecting arm (1) as a connecting edge and the corner opposite the connecting edge being intended for connection to a wheel axle.

5. Rear frame according to claim 3, characterized in that the support arm (2) is a right-angled triangular plate, one of the catheti of the support arm (2) being connected as a connecting edge to the connecting arm (1), the hypotenuse being located at the top of the support arm (2).

6. The rear frame according to any one of claims 1-5, characterized in that the support arm (2) is provided with a strip-shaped axle slot (22), and one end of the axle slot (22) is provided with an opening.

7. An electric vehicle, characterized in that it comprises a front frame, a rear wheel and a rear frame according to any one of claims 1-6, the connecting arm (1) of the rear frame being fixedly connected to the front frame; the rear wheel is pivoted with a wheel shaft, two ends of the wheel shaft respectively extend out of two sides of the rear wheel, and second ends of the two support arms (2) of the rear frame are fixedly connected with two ends of the wheel shaft in a one-to-one correspondence mode.

8. The electric vehicle according to claim 7, characterized by further comprising a rear seat, wherein the top surface of the supporting arm (2) is provided with a first lug (4), and a first supporting rod is connected between the first lug (4) and the rear seat.

9. An electric vehicle according to claim 7, characterized in that the top surface of the supporting arm (2) is provided with a second lug (5), and the second lug (5) is provided with a brake.

10. The electric vehicle according to claim 7, characterized by further comprising a mudguard, wherein the supporting arm (2) is provided with a fixing hole (24), a second supporting rod is fixedly connected to the mudguard, and the bottom end of the second supporting rod is connected to the supporting arm (2) through the fixing hole (24).