High load-bearing guide support wheel system and telescopic boom

Abstract

This utility model belongs to the technical field of battery swapping equipment and discloses a high-load-bearing guide support wheel system and a telescopic arm. The high-load-bearing guide support wheel system is disposed inside the telescopic arm, which includes at least a first telescopic fork and a second telescopic fork. The bottom of the first telescopic fork has a sliding cavity, and the top of the second telescopic fork is slidably placed inside the sliding cavity. A sliding groove is formed on the side wall of the second telescopic fork. The high-load-bearing guide support wheel system includes a first support wheel group and a second support wheel group distributed along the axial direction of the telescopic arm. The first support wheel group includes a support wheel and abutment wheels. The high-load-bearing guide support wheel system of this utility model bears radial loads through multiple support wheels and bears axial overturning moments through multiple abutment wheels in cooperation with the support wheels, thereby improving the ability to withstand radial loads and axial overturning moments, and ultimately improving the stability and guiding accuracy of the second telescopic fork during the telescopic process.

Description

Technical Field

[0001] This utility model relates to the field of battery swapping equipment technology, and in particular to a high load-bearing guide support wheel system and a telescopic arm. Background Technology

[0002] The telescopic arm of the battery swapping robot is the core actuator of the battery swapping equipment for new energy heavy trucks, and its design directly determines the battery swapping efficiency, accuracy, and safety. Most current telescopic arms adopt a multi-section telescopic design. Specifically, the telescopic arm includes multiple telescopic forks stacked vertically, with the uppermost telescopic fork fixed in place, and the remaining telescopic forks slidingly connected in pairs, achieving multi-level linkage through transmission systems such as gear racks, sprockets, and chains.

[0003] Currently, adjacent telescopic forks are guided and limited by a support wheel system. It can be understood that there is a sliding cavity at the bottom of the telescopic fork, and several support wheels are rotatably arranged inside the sliding cavity. The upper part of the telescopic fork is placed inside the sliding cavity, and a limiting groove is opened on the side wall of the telescopic fork near the sliding cavity where the support wheels are arranged. The support wheels are placed inside the limiting groove, and the telescopic fork is guided and supported by several support wheels.

[0004] However, the increasing weight and size of current battery packs lead to a longer extension stroke of the telescopic fork and an increase in the bending moment it bears. The support wheel system needs to withstand huge radial loads and axial overturning moments, but the existing support wheel system has limited load-bearing capacity, which affects the stability and guiding accuracy of the telescopic fork during the extension and retraction process, and urgently needs to be improved. Utility Model Content

[0005] The purpose of this invention is to provide a high-load-bearing guide support wheel system and telescopic arm to withstand huge radial loads and axial overturning moments, improve the stability and guiding accuracy of the telescopic fork during the telescopic process, and thus adapt to battery packs with increasing volume and weight.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A high-load-bearing guide support wheel system is disposed inside the telescopic arm. The telescopic arm includes at least a first telescopic fork and a second telescopic fork. The bottom of the first telescopic fork has a sliding cavity, and the top of the second telescopic fork slides along the axial direction of the telescopic arm inside the sliding cavity. A sliding groove is formed on the side wall of the second telescopic fork. The high-load-bearing guide support wheel system includes a first support wheel group and a second support wheel group distributed along the axial direction of the telescopic arm. At least two of the first support wheel group and the second support wheel group are arranged along the axial direction perpendicular to the telescopic arm.

[0008] The first support wheel assembly includes support wheels and abutment wheels. Multiple support wheels are arranged along the axial direction of the telescopic arm, and the axis of the support wheels is horizontal. The abutment wheel is placed between two adjacent support wheels, and the axis of the abutment wheel is vertical. Both the support wheels and the abutment wheels are rotatably connected to the inner wall of the sliding cavity.

[0009] Preferably, the first support wheel group and the second support wheel group are symmetrically arranged about the center of the length direction of the first telescopic fork body, and the first support wheel group and the second support wheel group are spaced apart.

[0010] Preferably, in the first support wheel group, the number of support wheels is greater than the number of abutment wheels.

[0011] Preferably, the support wheel includes:

[0012] A fixed shaft is disposed inside the sliding cavity, and the fixed shaft is horizontally positioned; and...

[0013] A support wheel is coaxially sleeved on the outside of the fixed shaft, and the support wheel and the fixed shaft are rotatably engaged.

[0014] Preferably, baffles are provided at both ends of the fixed shaft.

[0015] Preferably, a fixing head is connected to one end of the fixing shaft near the sliding cavity. The diameter of the fixing head is smaller than the diameter of the fixing shaft, and the fixing head is fixedly inserted through the first telescopic fork body.

[0016] Preferably, the abutment wheel includes:

[0017] A fixed bracket is disposed on the inner wall of the sliding cavity;

[0018] The abutment shaft is vertically mounted on the fixed bracket; and,

[0019] The abutment wheel is coaxially rotatably connected to the outside of the abutment shaft.

[0020] Preferably, the fixing bracket includes:

[0021] Two fixing plates are arranged at intervals along the vertical direction, and the fixing plates are connected to the inner wall of the sliding cavity.

[0022] Preferably, multiple abutting wheels are provided along the axial direction of the abutting shaft.

[0023] The telescopic arm includes a first telescopic fork and a second telescopic fork. The bottom of the first telescopic fork has a sliding cavity, and the top of the second telescopic fork slides along the axial direction of the telescopic arm inside the sliding cavity. The side wall of the second telescopic fork has a sliding groove, and the high load-bearing guide support wheel system is also included.

[0024] The beneficial effects of this utility model are:

[0025] This utility model's high-load-bearing guide support wheel system, by setting a first support wheel group and a second support wheel group, enables the second telescopic fork to extend and retract bidirectionally along the axial direction of the telescopic arm. Multiple support wheels and multiple abutment wheels constitute the first support wheel group, which can bear radial loads through multiple support wheels, thereby increasing the radial load that the high-load-bearing guide support wheel system can withstand. At the same time, multiple abutment wheels abut against the side wall of the sliding groove, and the multiple abutment wheels cooperate with the support wheels to bear the axial overturning moment. Ultimately, it improves the stability and guiding accuracy of the second telescopic fork during the extension and retraction process, thereby adapting to battery packs with increasingly larger volumes and weights. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the telescopic arm of this utility model;

[0027] Figure 2 This is a structural schematic diagram of the high load-bearing guide support wheel system of this utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the first support wheel group in the high load-bearing guide support wheel system of this utility model;

[0029] Figure 4 This is a schematic diagram of the support wheel structure in the high load-bearing guide support wheel system of this utility model;

[0030] Figure 5 This is a schematic diagram of the abutment wheel in the high load-bearing guide support wheel system of this utility model.

[0031] In the picture:

[0032] 01. First telescopic fork body; 011. Sliding cavity; 02. Second telescopic fork body; 021. Sliding groove; 022. Extension arm; 1. First support wheel assembly; 2. Support wheel; 21. Fixed shaft; 211. Fixed head; 212. Baffle; 22. Support wheel body; 3. Abutment wheel; 31. Fixed bracket; 311. Fixed plate; 32. Abutment shaft; 33. Abutment wheel body; 4. Second support wheel assembly. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] The following reference Figures 1 to 5 The high load-bearing guide support wheel system and telescopic arm provided by this utility model will be described.

[0038] The telescopic arm includes a first telescopic fork 01 and a second telescopic fork 02. The bottom of the first telescopic fork 01 has a sliding cavity 011, and the top of the second telescopic fork 02 is slidably disposed inside the sliding cavity 011 along the axial direction of the telescopic arm. A sliding groove 021 is formed on the side wall of the second telescopic fork 02. Specifically, in this embodiment, the bottom of the first telescopic fork 01 has two sliding cavities 011, and the second telescopic fork 02 is H-shaped with two extension arms 022 at its top. The two extension arms 022 are slidably disposed inside the two sliding cavities 011, and sliding grooves 021 are formed on the two side walls of each extension arm 022.

[0039] The telescopic boom also includes a high-load-bearing guide support wheel system, which is disposed between the first telescopic fork body 01 and the second telescopic fork body 02. The purpose of the high-load-bearing guide support wheel system is to guide and limit the extension and retraction of the second telescopic fork body 02. For the specific structure of the high-load-bearing guide support wheel system, please refer to the following content of this embodiment.

[0040] The high-load-bearing guide support wheel system includes a first support wheel group 1 and a second support wheel group 4. The first support wheel group 1 and the second support wheel group 4 are distributed along the axial direction of the telescopic arm, and multiple first support wheel groups 1 and 4 are arranged along an axial direction perpendicular to the telescopic arm. The number of first support wheel groups 1 and 4 is the same as the number of sliding grooves 021. The structure of the first support wheel group 1 is the same as that of the second support wheel group 4. The first support wheel group 1 includes a support wheel 2 and an abutment wheel 3. Multiple support wheels 2 are arranged along the axial direction of the telescopic arm, and the axis of the support wheel 2 is horizontal. The abutment wheel 3 is placed between two adjacent support wheels 2, and the axis of the abutment wheel 3 is vertical. Both the support wheel 2 and the abutment wheel 3 are rotatably connected to the inner wall of the sliding cavity 011 and located inside the sliding groove 021. The support wheel 2 abuts against the bottom and top of the sliding groove 021, and the abutment wheel 3 abuts against the side wall of the sliding groove 021.

[0041] As described above, by setting the first support wheel group 1 and the second support wheel group 4, the second telescopic fork 02 can extend and retract bidirectionally along the axial direction of the telescopic arm. During the extension and retraction of the second telescopic fork 02, multiple support wheels 2 and multiple abutment wheels 3 work together to guide and limit the second telescopic fork 02. Among them, the support wheels 2 bear the radial load, thereby increasing the radial load that the high load-bearing guide support wheel system can withstand; the abutment wheels 3 abut against the side wall of the sliding groove 021, thereby bearing the axial overturning moment. Ultimately, the stability and guiding accuracy of the second telescopic fork 02 during the extension and retraction process are improved, thereby adapting to the increasingly larger and heavier battery packs.

[0042] For example, in this embodiment, four sliding grooves 021 are provided, that is, four first support wheel groups 1 and two support wheel groups 4 are also provided, thereby increasing the load-bearing capacity of the high load-bearing guide support wheel system by increasing the number of first support wheel groups 1 and second support wheel groups 4.

[0043] Furthermore, the first support wheel assembly 1 and the second support wheel assembly 4 are symmetrically arranged about the center of the first telescopic fork 01 along its length, and the positions of the first support wheel assembly 1 and the second support wheel assembly 4 that are far apart from each other are close to the end of the first telescopic fork 01. This allows the first support wheel assembly 1 and the second support wheel assembly 4 to provide better support for the second telescopic fork 02, thereby increasing the extended length of the second telescopic fork 02.

[0044] It should be noted that the first support wheel group 1 and the second support wheel group 4 are spaced apart, so that a gap is left at the center of the length direction of the first telescopic fork body 01. This reduces the number of support wheels 2 and abutment wheels 3 without affecting the load-bearing capacity, thereby reducing the cost and weight of the high load-bearing guide support wheel system.

[0045] Furthermore, in the first support wheel assembly 1, the number of support wheels 2 is greater than the number of abutment wheels 3. The increased number of support wheels 2 supports the second telescopic fork body 02, thereby enhancing the load-bearing capacity of the high-load-bearing guide support wheel system. Simultaneously, the multiple support wheels 2 can distribute contact stress, reducing wear on the support wheels 2. For example, in this embodiment, there are nine support wheels 2 and five abutment wheels 3.

[0046] Specifically, each support wheel 2 includes a fixed shaft 21 and a support wheel body 22. The fixed shaft 21 is disposed on the inner wall of the sliding cavity 011. The fixed shaft 21 is horizontally disposed, and a fixed head 211 is coaxially connected to one end of the fixed shaft 21 near the sliding cavity 011. The fixed head 211 is fixedly inserted through and connected to the first telescopic fork body 01. The diameter of the fixed head 211 is smaller than the diameter of the fixed shaft 21, so that the end of the fixed shaft 21 abuts against the inner wall of the sliding cavity 011, thereby axially positioning the fixed shaft 21.

[0047] Furthermore, the support wheel 22 is coaxially sleeved on the outside of the fixed shaft 21, and the support wheel 22 and the fixed shaft 21 are rotatably engaged, thereby abutting against the bottom and top of the sliding groove 021 through the support wheel 22. In this embodiment, the width of the support wheel 22 is 75mm. By widening the support wheel 22, the contact stress can be further dispersed. In addition, the support wheel 22 is tempered, which firstly allows the material to obtain a tempered sorbite structure, improving toughness while maintaining high hardness, and preventing brittle fracture of the support wheel 22 under heavy load or impact load. Secondly, by eliminating quenching internal stress and refining grains, the contact fatigue life of the roller can be improved, and the spalling failure caused by alternating stress can be reduced. In addition, tempering provides an ideal matrix for subsequent surface quenching (such as medium frequency quenching), so that the surface hardness of the roller reaches 50-56HRC and the hardened layer depth is 3-4mm, which significantly improves wear resistance.

[0048] In addition, baffles 212 are connected to both ends of the fixed shaft 21, so that the support wheel 22 is limited by the baffles 212 to prevent the support wheel 22 from moving along the axial direction of the fixed shaft 21.

[0049] Specifically, each abutting wheel 3 includes a fixed bracket 31, an abutting shaft 32, and an abutting wheel body 33. The fixed bracket 31 is disposed on the inner wall of the sliding cavity 011. In this embodiment, the fixed bracket 31 includes two fixed plates 311 spaced apart in the vertical direction, and the fixed plates 311 are connected to the inner wall of the sliding cavity 011. Optionally, in some other embodiments, the fixed bracket 31 may also be C-shaped.

[0050] Furthermore, the abutment shaft 32 is vertically mounted on the fixed bracket 31, that is, connected between the two fixed plates 311, while the abutment wheel 33 is coaxially and rotatably connected to the outside of the abutment shaft 32. The abutment wheel 33 can be a guide wheel or a bearing. In this embodiment, a double-row cylindrical roller bearing is preferred. The double-row roller design of the double-row cylindrical roller bearing makes the radial load distribution more uniform. Even when a single row of rollers fails, it can still maintain more than 50% of the load-bearing capacity, which is particularly suitable for the intermittent impact load of the telescopic boom.

[0051] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A high-load-bearing guide support wheel system arranged inside a telescopic arm, the telescopic arm comprising at least a first telescopic fork body (01) and a second telescopic fork body (02), the bottom of the first telescopic fork body (01) having a sliding cavity (011), the top of the second telescopic fork body (02) being arranged inside the sliding cavity (011) along the axial direction of the telescopic arm, and the side wall of the second telescopic fork body (02) being provided with a sliding groove (021), characterized in that, The high load-bearing guide support wheel system includes a first support wheel group (1) and a second support wheel group (4) distributed along the axial direction of the telescopic arm. At least two of the first support wheel group (1) and the second support wheel group (4) are provided in a direction perpendicular to the axial direction of the telescopic arm. The first support wheel group (1) includes a support wheel (2) and an abutment wheel (3). Multiple support wheels (2) are arranged along the axial direction of the telescopic arm. The axis of the support wheel (2) is horizontal. The abutment wheel (3) is placed between two adjacent support wheels (2). The axis of the abutment wheel (3) is vertical. Both the support wheel (2) and the abutment wheel (3) are rotatably connected to the inner wall of the sliding cavity (011).

2. The high load-bearing guide support wheel system according to claim 1, characterized in that, The first support wheel group (1) and the second support wheel group (4) are symmetrically arranged about the center of the length direction of the first telescopic fork body (01), and the first support wheel group (1) and the second support wheel group (4) are spaced apart.

3. The high load-bearing guide support wheel system according to claim 1, characterized in that, In the first support wheel group (1), the number of support wheels (2) is greater than the number of abutment wheels (3).

4. The high load-bearing guide support wheel system according to claim 1, characterized in that, The support wheel (2) includes: A fixed shaft (21) is disposed inside the sliding cavity (011), and the fixed shaft (21) is horizontally disposed; and, The support wheel (22) is coaxially sleeved on the outside of the fixed shaft (21), and the support wheel (22) and the fixed shaft (21) are rotatably engaged.

5. The high load-bearing guide support wheel system according to claim 4, characterized in that, Both ends of the fixed shaft (21) are provided with baffles (212).

6. The high load-bearing guide support wheel system according to claim 4, characterized in that, The fixed shaft (21) is connected to a fixed head (211) at one end near the sliding cavity (011). The diameter of the fixed head (211) is smaller than the diameter of the fixed shaft (21). The fixed head (211) is fixedly inserted through the first telescopic fork body (01).

7. The high load-bearing guide support wheel system according to claim 1, characterized in that, The abutment wheel (3) includes: A fixed bracket (31) is disposed on the inner wall of the sliding cavity (011); The abutment shaft (32) is vertically mounted on the fixed bracket (31); and, The abutting wheel (33) is coaxially rotatably connected to the outside of the abutting shaft (32).

8. The high load-bearing guide support wheel system according to claim 7, characterized in that, The fixed bracket (31) includes: There are two fixing plates (311) arranged at intervals along the vertical direction, and the fixing plates (311) are connected to the inner wall of the sliding cavity (011).

9. The high load-bearing guide support wheel system according to claim 7, characterized in that, Multiple abutting wheel bodies (33) are arranged along the axial direction of the abutting shaft (32).

10. A telescopic arm, comprising a first telescopic fork (01) and a second telescopic fork (02), wherein the bottom of the first telescopic fork (01) has a sliding cavity (011), and the top of the second telescopic fork (02) is slidably disposed inside the sliding cavity (011) along the axial direction of the telescopic arm, and a sliding groove (021) is formed in the side wall of the second telescopic fork (02), characterized in that, It also includes the high load-bearing guide support wheel system as described in any one of claims 1-9.

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