Adjusting mechanism for adjusting height of backrest of electric vehicle

Abstract

The utility model discloses an adjusting mechanism for realizing height adjustability of a backrest of an electric vehicle, which comprises an H-shaped lower bracket, a rectangular upper bracket and an adjusting screw rod, the lower end of the H-shaped lower bracket is provided with a fixing part fixedly connected with a rear armrest of the electric vehicle, and the upper end of the H-shaped lower bracket is respectively and vertically provided with a guide post; the rectangular upper support is provided with a guide hole for the guide column to penetrate through and a fixing lug used for being fixedly connected with a rear backrest of the electric vehicle. An adjusting screw penetrating hole is formed in the middle of a cross beam of the H-shaped lower support, an adjusting screw channel is formed in the middle of the rectangular upper support, and the adjusting screw penetrates through the adjusting screw penetrating hole and the adjusting screw channel at the same time. And an adjusting knob is arranged at the head end of the adjusting screw rod below the adjusting screw rod through hole. When the adjusting mechanism is used for a backrest armrest assembly of an electric vehicle, the height of a backrest can be freely adjusted, the adjustable freedom degree is large, stability is good, and the adjusting mechanism has the advantages of being simple in structure, low in manufacturing cost and the like.

Description

Technical Field

[0001] The utility model relates to an adjusting mechanism for realizing the adjustable height of a rear backrest of an electric vehicle, belonging to the technical field of electric vehicles. Background Art

[0002] As society pays more and more attention to environmental protection and energy conservation, electric vehicles, as a green, energy-saving and emission-reducing means of transportation, have played an increasingly important role in public transportation. At present, electric vehicles have been widely used by consumers as daily transportation. At present, most electric vehicles have the function of carrying passengers, that is, they can carry other passengers in addition to the driver. In order to better ensure the safety of the rear passengers, electric vehicles usually need to be equipped with rear armrests and rear backrests.

[0003] At present, the rear backrests of electric vehicles with passenger-carrying functions on the market are often fixedly installed on the rear armrests, and the rear backrests are basically fixed and cannot be moved, resulting in that they cannot meet the usage needs of different rear passengers in actual use. For example, rear passengers of different heights should have different requirements for the protective height of the rear backrest. The rear backrest height required by the short rear passengers will not only fail to provide safety protection for the tall rear passengers, but a rear backrest that is too low will also cause discomfort to the rear passengers. In order to better meet the needs of rear passengers of different heights, the applicant applied for two utility model patents in April 2020 (authorization publication numbers CN 212243648 U and CN 212243649 U), respectively disclosing two height adjustment structures. Although the adjustment structures described in these two patents can realize the height adjustment of the rear backrest, there are either limited adjustable freedom (such as the adjustment hole structure described in authorization publication number CN212243648 U), or complex structure and high production cost (such as the combination structure of the worm gear mechanism and the rack and pinion described in authorization publication number CN 212243649 U). Summary of the invention

[0004] In view of the above problems and needs existing in the prior art, the purpose of the utility model is to provide an adjustment mechanism for adjusting the height of the rear backrest of an electric vehicle which has not only a high degree of adjustable freedom and good stability, but also a simple structure and low manufacturing cost.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An adjustment mechanism for achieving adjustable height of a rear backrest of an electric vehicle comprises an H-shaped lower bracket, a rectangular upper bracket and an adjustment screw, wherein the lower end of the H-shaped lower bracket is provided with a fixing portion fixedly connected to a rear armrest of the electric vehicle, the upper end of the H-shaped lower bracket is vertically provided with guide columns, the rectangular upper bracket is provided with guide holes for the guide columns to pass through and fixing ears for fixed connection to the rear backrest of the electric vehicle; an adjustment screw through-hole is provided in the middle of the crossbeam of the H-shaped lower bracket, an adjustment screw channel is provided in the middle of the rectangular upper bracket, the adjustment screw is simultaneously passed through the adjustment screw through-hole and the adjustment screw channel; and an adjustment knob is provided at the head end of the adjustment screw located below the adjustment screw through-hole.

[0007] In one embodiment, the adjusting screw is provided with a non-threaded section and a threaded section, the non-threaded section is penetrated in the through hole of the adjusting screw, and the threaded section is penetrated in the channel of the adjusting screw.

[0008] In a preferred solution, a limit bolt is provided at the end of the adjusting screw rod.

[0009] In one embodiment, a rectangular through hole is provided at the center of the rectangular upper bracket.

[0010] In a preferred embodiment, a protrusion protruding forward is provided at the lower part of the rectangular through hole, and the adjusting screw channel is provided on the protrusion.

[0011] According to a further preferred embodiment, a positioning groove is provided at an upper portion of the rectangular through hole.

[0012] In one implementation, the fixing portion of the H-shaped lower bracket is fixedly connected (preferably detachably fixedly connected) to the rear of the rear armrest of the electric vehicle.

[0013] In one embodiment, the fixing ears of the rectangular upper bracket are fixedly connected (preferably detachably fixedly connected) to the inner wall of the front shell of the rear backrest of the electric vehicle.

[0014] In a preferred embodiment, the rear backrest of the electric vehicle further comprises a rear shell, the rectangular upper bracket is located in a cavity formed by the front shell and the rear shell, and two upper arms for the H-shaped lower bracket and a channel for the adjustment screw to pass through are provided at the bottom of the rear shell.

[0015] In a preferred embodiment, a flat key connection structure is provided between the outer wall of the head end of the adjusting screw and the inner wall of the adjusting knob.

[0016] Compared with the prior art, the beneficial technical effects of the utility model are:

[0017] When the adjustment mechanism provided by the utility model is used for the rear backrest armrest assembly of an electric vehicle, not only can the rear backrest height be freely adjusted, but also the adjustable freedom is large and the stability is good, so that the height requirements of the rear passengers of different heights for the rear backrest of the electric vehicle can be met. In addition, the utility model also has the advantages of simple structure, low production cost, good safety protection, and suitability for industrial production. Therefore, compared with the existing technology, the utility model has obvious practical value and progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of an adjustment mechanism for achieving adjustable height of a rear backrest of an electric vehicle provided by an embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the H-shaped lower bracket described in the embodiment of the utility model;

[0020] Figure 3 It is a schematic structural diagram of the rectangular upper bracket described in the embodiment of the utility model;

[0021] Figure 4 It is a schematic diagram of the installation structure of the adjustment mechanism and the rear armrest and rear backrest of the electric vehicle described in the embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of the installation structure of the adjustment mechanism and the rear armrest and rear backrest of the electric vehicle described in the embodiment of the utility model from another perspective;

[0023] Figure 6 It is a schematic diagram of the structure of the adjusting screw described in the embodiment of the utility model;

[0024] Figure 7 It is a schematic diagram of the structure of the adjusting knob in the embodiment of the utility model;

[0025] Figure 8 This is a state diagram when the adjustment structure of the utility model is installed so that the rear backrest of the electric vehicle is in the lowest position;

[0026] Fig. 9 This is a state diagram of the adjustment structure of the utility model when the rear backrest of the electric vehicle is in the lowest position;

[0027] Fig.10 This is a state diagram when the adjustment structure of the utility model is installed so that the rear backrest of the electric vehicle is in the highest position;

[0028] Fig.11 This is a state diagram of the adjustment structure of the utility model when the rear backrest of the electric vehicle is in the highest position;

[0029] The numbers in the figure are as follows:

[0030] 1. H-shaped lower bracket; 1-1. Fixed part; 1-2. Guide column; 1-3. Adjustment screw through hole; 2. Rectangular upper bracket; 2-1. Guide hole; 2-2. Fixing ear; 2-3. Adjustment screw channel; 2-4. Rectangular through hole; 2-5. Protrusion; 2-6. Positioning groove; 3. Adjustment screw; 3-1. Adjustment screw head end; 3-11. Keyway; 3-2. Non-threaded section; 3-3. Threaded section; 3-4. Adjustment screw end; 4. Electric vehicle rear armrest; 5. Electric vehicle rear backrest; 5-1. Front shell; 5-2. Rear shell; 5-21. Channel; 6. Adjustment knob; 6-1. Flat key; 7. Limit bolt. DETAILED DESCRIPTION

[0031] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. Example

[0032] Please combine Figures 1 to 7 As shown: The utility model provides an adjustment mechanism for achieving adjustable height of the rear backrest of an electric vehicle, comprising an H-shaped lower bracket 1, a rectangular upper bracket 2 and an adjusting screw 3, wherein the lower end of the H-shaped lower bracket 1 is provided with a fixing portion 1-1 fixedly connected to the rear armrest 4 of the electric vehicle, and the upper end of the H-shaped lower bracket 1 is vertically provided with guide columns 1-2, and the rectangular upper bracket 2 is provided with a guide hole 2-1 for the guide column 1-2 to pass through and a fixing ear 2-2 for fixedly connected to the rear backrest 5 of the electric vehicle; an adjusting screw through-hole 1-3 is provided in the middle of the crossbeam of the H-shaped lower bracket 1, and an adjusting screw channel 2-3 is provided in the middle of the rectangular upper bracket 2, and the adjusting screw 3 is simultaneously passed through the adjusting screw through-hole 1-3 and the adjusting screw channel 2-3; and an adjusting knob 6 is provided at the head end 3-1 of the adjusting screw located below the adjusting screw through-hole 1-3.

[0033] In this embodiment, the adjusting screw 3 is provided with a non-threaded section 3-2 and a threaded section 3-3, the non-threaded section 3-2 is penetrated in the adjusting screw through hole 1-3, the threaded section 3-3 is penetrated in the adjusting screw channel 2-3, and a limiting bolt 7 is provided at the end 3-4 of the adjusting screw.

[0034] In addition, in this embodiment, a rectangular through hole 2-4 is provided at the center of the rectangular upper bracket 2, a protrusion 2-5 protruding forward is provided at the lower part of the rectangular through hole 2-4, an adjusting screw channel 2-3 is provided on the protrusion 2-5, and a positioning groove 2-6 is provided at the upper part of the rectangular through hole 2-4.

[0035] In this embodiment, the fixing portion 1-1 of the H-shaped lower bracket 1 is fixedly connected (preferably a detachable fixed connection, for example, a screw connection) to the rear of the rear armrest 4 of the electric vehicle, and the fixing ear 2-2 of the rectangular upper bracket 2 is fixedly connected (preferably a detachable fixed connection, for example, a screw connection) to the inner wall of the front shell 5-1 of the rear backrest 5 of the electric vehicle.

[0036] In this embodiment, the rear backrest 5 of the electric vehicle also includes a rear shell 5-2, the rectangular upper bracket 2 is located in the cavity formed by the front shell 5-1 and the rear shell 5-2, and a channel 5-21 for the two upper arms of the H-shaped lower bracket 1 and the adjusting screw 3 to pass through is provided at the bottom of the rear shell 5-2.

[0037] As a preferred embodiment, a flat key connection structure is provided between the outer wall of the adjusting screw head end 3-1 and the inner wall of the adjusting knob 6. Specifically, in this embodiment, a keyway 3-11 is provided on the outer wall of the adjusting screw head end 3-1, and a flat key 6-1 is provided on the inner wall of the adjusting knob 6. Of course, it is also possible to provide a flat key on the outer wall of the adjusting screw head end 3-1 and a keyway on the inner wall of the adjusting knob 6. Although not shown in the figure, such a setting situation is easily understood by technical personnel in this field.

[0038] Please combine Figure 4 , Figure 5 and Figures 8 to 11 As shown, the method of using the adjustment mechanism for adjusting the height of the rear backrest of an electric vehicle in the utility model is as follows:

[0039] First, the fixing portion 1-1 of the H-shaped lower bracket 1 is fixedly connected to the rear portion of the rear armrest 4 of the electric vehicle, and the fixing ear 2-2 of the rectangular upper bracket 2 is fixedly connected to the inner wall of the front housing 5-1 of the rear backrest 5 of the electric vehicle;

[0040] Then, the guide column 1-2 vertically arranged on the upper end of the H-shaped lower bracket 1 is inserted into the corresponding guide hole 2-1 arranged on the rectangular upper bracket 2, and the adjusting screw 3 is inserted into the adjusting screw through hole 1-3 and the adjusting screw channel 2-3 at the same time;

[0041] Then, by rotating the adjusting knob 6 in the forward or reverse direction, the adjusting screw 3 is driven to move linearly up and down, and then the rectangular upper bracket 2 is driven to move linearly up and down. Since the rectangular upper bracket 2 is fixedly connected to the rear backrest 5 of the electric vehicle, when the rectangular upper bracket 2 moves linearly up and down, the rear backrest 5 of the electric vehicle can be driven to move linearly up and down, thereby realizing the height adjustment of the rear backrest 5 of the electric vehicle.

[0042] Please refer to Figure 8 and Fig. 9As shown, when the rear backrest 5 of the electric vehicle is in the lowest position, the distance between the upper end of the H-shaped lower bracket 1 and the lower end of the rectangular upper bracket 2 is zero, the guide column 1-2 passes through the guide hole 2-1 (as a preferred embodiment, the length of the guide column 1-2 passing through the guide hole 2-1 at this time is used as the maximum adjustable height dimension of the rear backrest 5 of the electric vehicle), and at this time, the lowest part of the threaded segment 3-3 of the adjusting screw 3 is located in the adjusting screw channel 2-3.

[0043] Please refer to Fig.10 and Fig.11 As shown, when the rear backrest 5 of the electric vehicle is in the highest position, the top end of the guide column 1-2 is flush with the top surface of the guide hole 2-1, and the spacing between the upper end of the H-shaped lower bracket 1 and the lower end of the rectangular upper bracket 2 is equal to the maximum adjustable height dimension of the rear backrest 5 of the electric vehicle (that is, equal to the length dimension of the guide column 1-2 passing through the guide hole 2-1 when in the lowest position), and at this time, the highest part of the threaded segment 3-3 of the adjusting screw 3 is located in the adjusting screw channel 2-3.

[0044] That is to say, the height adjustable range of the electric vehicle rear backrest 5 of the utility model only needs to be adjusted according to the use needs by setting the distance between the upper end of the H-shaped lower bracket 1 and the lower end of the rectangular upper bracket 2 to zero, the length dimension of the guide column 1-2 passing through the guide hole 2-1 is the same as the adjustable height dimension to be achieved, and the threaded section dimension of the adjusting screw 3 is equal to the sum of the adjustable height dimension to be achieved and the height dimension of the adjusting screw channel 2-3 (please refer to the embodiment of the utility model for details). Fig. 9 and Fig.11 as shown).

[0045] From the above, it can be seen that when the adjustment mechanism provided by the utility model is used for the rear backrest armrest assembly of an electric vehicle, not only can the rear backrest height be freely adjusted, but also the adjustable freedom is large and the stability is good, so that the height requirements of the rear passengers of different heights for the rear backrest of the electric vehicle can be met. In addition, the utility model also has the advantages of simple structure, low production cost, good safety protection, and suitability for industrial production. Therefore, compared with the existing technology, the utility model has obvious practical value and progress.

[0046] In addition, it should be noted that the terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. Unless otherwise defined, the technical terms or scientific terms used in the present invention should be the common meanings understood by people with general skills in the field. The orientations or positional relationships indicated by the terms "inside", "outside", "upper", "lower", "top", "bottom", "front", "back", "left", "right", "vertical" and the like are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, and for ordinary technicians in the field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0047] Finally, it is necessary to point out that the above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the utility model should be covered within the protection scope of the utility model.

Claims

1. An adjustment mechanism for achieving adjustable height of a rear backrest of an electric vehicle, characterized in that: It includes an H-shaped lower bracket, a rectangular upper bracket and an adjusting screw. The lower end of the H-shaped lower bracket is provided with a fixing portion fixedly connected to the rear armrest of the electric vehicle, the upper ends of the H-shaped lower bracket are respectively vertically provided with guide columns, and the rectangular upper bracket is provided with guide holes for the guide columns to pass through and fixing ears for fixedly connected to the rear backrest of the electric vehicle; an adjusting screw through-hole is provided in the middle of the crossbeam of the H-shaped lower bracket, and an adjusting screw channel is provided in the middle of the rectangular upper bracket, and the adjusting screw is simultaneously passed through the adjusting screw through-hole and the adjusting screw channel; and an adjusting knob is provided at the head end of the adjusting screw located below the adjusting screw through-hole.

2. The height-adjusting mechanism for realizing the rear backrest of an electric vehicle according to claim 1, characterized in that: The adjusting screw is provided with a non-threaded section and a threaded section, wherein the non-threaded section is penetrated in the through hole of the adjusting screw, and the threaded section is penetrated in the channel of the adjusting screw.

3. The height-adjustable mechanism for the rear backrest of an electric vehicle according to claim 1 or 2, characterized in that: A limit bolt is arranged at the end of the adjusting screw rod.

4. The height-adjusting mechanism for realizing the rear backrest of an electric vehicle according to claim 1, characterized in that: A rectangular through hole is provided at the center of the rectangular upper bracket.

5. The height-adjusting mechanism for realizing the rear backrest of an electric vehicle according to claim 4, characterized in that: A protrusion protruding forward is arranged at the lower part of the rectangular through hole, and an adjusting screw passage is arranged on the protrusion.

6. The height-adjusting mechanism for realizing the rear backrest of an electric vehicle according to claim 5, characterized in that: A positioning groove is arranged on the upper part of the rectangular through hole.

7. The height-adjusting mechanism for realizing the rear backrest of an electric vehicle according to claim 1, characterized in that: The fixing part of the H-shaped lower bracket is fixedly connected to the rear part of the rear armrest of the electric vehicle, and the fixing ear of the rectangular upper bracket is fixedly connected to the inner wall of the front shell body of the rear backrest of the electric vehicle.

8. The height-adjusting mechanism for realizing the rear backrest of an electric vehicle according to claim 7, characterized in that: The fixed connection is a detachable connection.

9. The height-adjusting mechanism for realizing the rear backrest of an electric vehicle according to claim 7, characterized in that: The rear backrest of the electric vehicle also includes a rear shell, the rectangular upper bracket is located in a cavity formed by the front shell and the rear shell, and a channel for two upper arms of the H-shaped lower bracket and an adjusting screw to pass through is provided at the bottom of the rear shell.

10. The height-adjusting mechanism for realizing the rear backrest of an electric vehicle according to claim 1, characterized in that: A flat key connection structure is arranged between the outer wall of the head end of the adjusting screw rod and the inner wall of the adjusting knob.

Images