Boom device and working machine
By setting a limit structure between the main arm and the bias arm of the arm frame device, the problem that the main arm and the bias arm are easily interfered during the expansion and collection process of the arm frame device are solved, normal expansion and closing are achieved, and service life is extended.
Patent Information
- Application Number
- CN202421428618.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-06-20
AI Technical Summary
During the installation of the boom device, the main arm and the biasing arm are prone to interference, resulting in the inability to complete the installation and reduce the service life.
A limiting structure is provided between the main arm and the biasing arm, which is located in the give way gap to prevent the biasing arm from interfering with the main arm during the expansion or retraction.
Effectively prevent interference between the main arm and the bias arm during the expansion and collection process, ensure that the arm frame device can be deployed and closed normally, and extend the service life.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engineering machinery and equipment, in particular to a boom device and an operating machine. Background Art
[0002] In various aerial operations and fire rescue operations, operating machinery with foldable and unfoldable boom devices are used. For example, in a fire truck, the boom device is one of the key components that determine the overall operating performance of the fire truck. To ensure the rescue height of the fire truck, the unfolded length of the boom device must be ensured. Therefore, the boom device of the fire truck is gradually developing in the direction of long arms.
[0003] In the related art, the boom device includes a main arm and an offset arm, the main arm is usually a telescopic arm, and the offset arm is usually a folding arm. The boom device is relatively long, and the offset arm has problems such as manufacturing errors and self-deformation, which will cause the main arm and the offset arm to interfere easily during the extension and retraction process of the offset arm, making it impossible to complete the extension and retraction, and also reducing the service life of the boom device.
[0004] Therefore, how to solve the problem in the related art that the main arm and the offset arm are prone to interference during the extension and retraction process of the boom device is a technical problem that the industry urgently needs to solve. Utility Model Content
[0005] The utility model provides a boom device and an operating machine, which are used to solve the problem in the related art that the main boom and the offset arm of the boom device are prone to interference during the process of extension and retraction.
[0006] The first aspect of the utility model provides an arm support device, comprising:
[0007] The arm frame body comprises a main arm and an offset arm; the main arm has a first side surface, one end of the offset arm is rotatably connected to the first end of the main arm, and the offset arm can be switched between an extended state and a retracted state; in the retracted state, the offset arm and the first side surface of the main arm form a clearance;
[0008] The limiting structure is arranged between the main arm and the offset arm and is located in the clearance gap to prevent the offset arm from interfering with the main arm during the process of unfolding or folding.
[0009] According to the arm support device provided by the utility model, the limiting structure includes:
[0010] A first limiting member, disposed on the first side surface;
[0011] A second limiting member is disposed on a side of the biasing arm facing the first side surface;
[0012] During the process of the biasing arm being expanded or retracted, the second limiting member is separated from or in contact with the first limiting member.
[0013] According to the arm device provided by the utility model, the edge of the second limiting member forms a first guiding inclined surface; during the process of the offset arm being extended or retracted, the first guiding inclined surface is separated from or slidably matched with the first limiting member.
[0014] According to the arm device provided by the utility model, the second limit member is arranged on the arm mounting block of the offset arm; the edge of the arm mounting block forms a second guide inclined surface, and the second guide inclined surface is used to provide an avoidance path for the first limit member to slide toward the first guide inclined surface.
[0015] According to the arm support device provided by the utility model, the second position-limiting member has a rolling portion; during the process of the offset arm being extended or retracted, the rolling portion is separated from or rollingly matched with the first position-limiting member.
[0016] According to the arm support device provided by the utility model, the offset arm comprises:
[0017] a first arm section, one end of which is rotatably connected to the first end of the main arm, and at least one second stopper is disposed on a side of the first arm section facing the first side surface;
[0018] The second arm section, one end of the second arm section is rotatably connected to the other end of the first arm section, and at least one second limiting member is provided on a side of the second arm section facing the first side surface.
[0019] According to the arm device provided by the utility model, in the folded state, the second position-limiting member of the first arm section and the second position-limiting member of the second arm section are arranged along the width direction of the first side surface.
[0020] According to the arm support device provided by the utility model, the first limiting member is arranged on a side of the first side surface away from the first end of the main arm.
[0021] A second aspect of the utility model provides an operating machine, comprising an operating machine body, and a boom device as described in any one of the above items; the boom device is connected to the operating machine body.
[0022] According to the working machine provided by the utility model, the working machine includes a fire truck.
[0023] The boom device provided by the utility model can separate the main arm and the offset arm by arranging a limiting structure between the main arm and the offset arm, and the limiting structure is located in the clearance gap, so as to prevent the offset arm from interfering with the main arm during the expansion or contraction process, and effectively solves the problem in the related art that the main arm and the offset arm are prone to interference during the expansion and contraction process.
[0024] The working machine of the utility model has the above-mentioned boom device, and therefore has at least the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the technical solutions in the present utility model or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0026] Figure 1 It is a structural schematic diagram of the offset arm of the arm support device provided by the utility model in the unfolded state;
[0027] Figure 2 This is one of the structural schematic diagrams of the offset arm of the arm support device provided by the utility model when it is not fully retracted;
[0028] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure of the AA section;
[0029] Figure 4 This is the second structural schematic diagram of the offset arm of the arm support device provided by the utility model when it is not fully retracted;
[0030] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure at point B in the middle.
[0031] Reference numerals:
[0032] 100, main arm; 101, first side surface;
[0033] 200, offset arm; 210, first arm section; 220, second arm section; 230, third arm section; 240, arm support mounting block; 241, second guide inclined surface;
[0034] 300, limiting structure; 310, first limiting member; 320, second limiting member; 321, first guiding inclined surface. DETAILED DESCRIPTION
[0035] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0036] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0037] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.
[0038] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 utility model embodiment. In this specification, the schematic representations of the above terms 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. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0040] Combine the following Figures 1 to 5 The arm support device of the utility model is described in detail. Figure 1 It is a structural schematic diagram of the offset arm of the arm support device provided by the utility model in the unfolded state; Figure 2 This is one of the structural schematic diagrams of the offset arm of the arm support device provided by the utility model when it is not fully retracted; Figure 3 yes Figure 2 A schematic diagram of the enlarged structure of the AA section;
[0041] Figure 4 This is the second structural schematic diagram of the offset arm of the arm support device provided by the utility model when it is not fully retracted; Figure 5 yes Figure 4 Schematic diagram of the enlarged structure at point B in the middle.
[0042] like Figures 1 to 5 As shown, the specific implementation of the first aspect of the utility model provides an arm support device. The arm support device includes an arm support body and a limiting structure 300.
[0043] The arm frame body includes a main arm 100 and an offset arm 200; the main arm 100 has a first side surface 101, one end of the offset arm 200 is rotatably connected to the first end of the main arm 100, and the offset arm 200 can switch between an extended state and a retracted state; in the retracted state, the offset arm 200 and the first side surface 101 of the main arm 100 form a clearance; the limiting structure 300 is arranged between the main arm 100 and the offset arm 200, and is located in the clearance gap to prevent the offset arm 200 from interfering with the main arm 100 during the extension or retraction process.
[0044] In this embodiment, by setting a limiting structure 300 between the main arm 100 and the offset arm 200, and the limiting structure 300 is located in the clearance, the main arm 100 and the offset arm 200 can be separated, thereby preventing the offset arm 200 from interfering with the main arm 100 during the unfolding or retracting process, and effectively solving the problem in the related art that the main arm 100 and the offset arm 200 are prone to interference during the unfolding and retracting process.
[0045] like Figure 1 As shown, it can be understood that when the offset arm 200 is in the folded state, the side of the main arm 100 facing the offset arm 200 is defined as the first side 101 of the main arm 100. The dimension of the first side 101 in the axial direction of the main arm 100 is the length of the first side 101, that is, the length of the first side 101 refers to the dimension of the first side 101 in the up-down direction. The dimension of the first side 101 in the radial direction of the main arm 100 is the width of the first side 101, that is, the width of the first side 101 refers to the dimension of the first side 101 in the left-right direction.
[0046] It can be understood that the first end of the main arm 100 refers to the end that is rotatably connected to the biasing arm 200. In other words, the first end of the main arm 100 refers to the end that is rotatably connected to the biasing arm 200. Figure 1 The upper end shown.
[0047] In some embodiments, the limiting structure 300 includes a first limiting member 310 and a second limiting member 320; the first limiting member 310 is arranged on the first side surface 101; the second limiting member 320 is arranged on the side of the offset arm 200 facing the first side surface 101; during the process of expanding or contracting the offset arm 200, the second limiting member 320 is separated from or in contact with the first limiting member 310.
[0048] During the process of the offset arm 200 being extended or retracted, if the first limit member 310 and the second limit member 320 are separated, it means that the clearance gap between the main arm 100 and the offset arm 200 is relatively large, and interference is unlikely to occur. However, under existing working conditions, the width of the clearance gap is limited, and the limit structure 300 is installed in the clearance gap. Normally, during the process of the offset arm 200 being extended or retracted, the second limit member 320 and the first limit member 310 will contact each other, which can prevent the offset arm 200 from interfering with the main arm 100. At the same time, it can also play a guiding role, and can limit the offset arm 200 to the left and right, thereby improving reliability and enabling the offset arm 200 to complete the extension or retraction work more stably. Figure 1 and Figure 2As shown, in some embodiments, the offset arm 200 includes a first arm section 210 and a second arm section 220; one end of the first arm section 210 is rotatably connected to the first end of the main arm 100; the other end of the first arm section 210 is rotatably connected to one end of the second arm section 220. In the folded state, the first arm section 210 and the second arm section 220 are both folded and located at the side of the main arm 100. A clearance gap is formed between the first arm section 210 and the first side surface 101 of the main arm 100, and between the second arm section 220 and the first side surface 101 of the main arm 100.
[0049] Optionally, the first arm section 210 may be a telescopic arm or a folding arm. The second arm section 220 may be a folding arm.
[0050] Furthermore, the offset arm 200 may further include a third arm section 230; one end of the third arm section 230 is rotatably connected to the other end of the second arm section 220. Figure 2 As shown, in the folded state, the third arm section 230 is located between the first arm section 210 and the second arm section 220 .
[0051] Optionally, the third arm section 230 may be a folding arm.
[0052] It is understandable that the second limiter 320 may be provided on any arm section contacting the first limiter 310 provided on the main arm 100. Preferably, the second limiter 320 is provided on the first arm section 210 and the second arm section 220.
[0053] like Figure 1 As shown, further, the first stopper 310 includes but is not limited to a wear-resistant strip. Specifically, the wear-resistant strip is a rectangular structure, the left edge of the wear-resistant strip is aligned with the left edge of the first side surface 101, and the right edge of the wear-resistant strip is aligned with the right edge of the first side surface 101, so as to avoid the second stopper 320 from contacting the first side surface 101. The wear-resistant strip is taken as an example for detailed description.
[0054] In some embodiments, the upper edge of the wear strip is aligned with the upper edge of the first side 101, the lower edge of the wear strip is aligned with the lower edge of the first side 101, the left edge of the wear strip is aligned with the left edge of the first side 101, and the right edge of the wear strip is aligned with the right edge of the first side 101. In other words, the first side 101 is arranged with wear strips.
[0055] like Figure 1 As shown, in some other embodiments, the upper edge of the wear strip is lower than the upper edge of the first side surface 101, the lower edge of the wear strip is higher than the lower edge of the first side surface 101, the left edge of the wear strip is aligned with the left edge of the first side surface 101, and the right edge of the wear strip is aligned with the right edge of the first side surface 101. In other words, the wear strip is laid on a partial area of the first side surface 101.
[0056] like Figure 3 As shown, in some embodiments, the edge of the second stopper 320 forms a first guide inclined surface 321, and during the process of the offset arm 200 being expanded or retracted, the first guide inclined surface 321 is separated from or slidably matched with the first stopper 310. Compared with the second stopper 320 without a guide inclined surface, this embodiment can improve the fault tolerance of the stopper structure 300.
[0057] In some embodiments, the second limit member 320 is arranged on the arm mounting block 240 of the offset arm 200; the edge of the arm mounting block 240 forms a second guide inclined surface 241, and the second guide inclined surface 241 is used to provide an avoidance path for the first limit member 310 to slide toward the first guide inclined surface 321, which can further prevent the main arm 100 from interfering with the offset arm 200.
[0058] The clearance gap is small. During the process of unfolding or folding, the second limiting member 320 usually contacts the first limiting member 310 , and the second limiting member 320 moves relative to the first limiting member 310 , which generates friction between the second limiting member 320 and the first limiting member 310 .
[0059] In some other embodiments, the second stopper 320 has a rolling portion; during the process of the offset arm 200 being extended or retracted, the rolling portion is separated from or rolls with the first stopper 310. Specifically, when the second stopper 320 contacts the first stopper 310, the rolling portion rolls, and rolling friction is formed between the first stopper 310 and the first stopper 310, which reduces the friction resistance compared to the sliding cooperation between the first stopper 310 and the second stopper 320.
[0060] Furthermore, the second limiting member 320 includes but is not limited to a universal ball.
[0061] like Figure 3 and Figure 4 As shown, in some embodiments, the number of the second stopper 320 is at least two; at least one second stopper 320 is provided on the side of the first arm section 210 facing the first side surface 101; and at least one second stopper 320 is provided on the side of the second arm section 220 facing the first side surface 101. By providing at least one second stopper 320 on the first arm section 210 and at least one second stopper 320 on the second arm section 220, the overlap area of the first stopper 310 and the second stopper 320 can be increased, thereby increasing the support point position of the first stopper 310, reducing the positive pressure of the first stopper 310, and improving the service life of the first stopper 310.
[0062] In some embodiments, during the process of unfolding and folding, the second limit member 320 on the second arm section 220 first contacts the first limit member 310, which can limit the left and right deformation or deflection of the second arm section 220. Then the second limit member 320 on the first arm section 210 contacts the first limit member 310 again, which can limit the left and right deformation or deflection of the first arm section 210, thereby achieving left and right limitation of the offset arm 200 and improving reliability.
[0063] In some embodiments, in the folded state, the second stopper 320 of the first arm section 210 and the second stopper 320 of the second arm section 220 are arranged along the width direction of the first side surface 101 .
[0064] Furthermore, the second limiting member 320 is located in the middle of the first limiting member 310 .
[0065] In some embodiments, the first stopper 310 is disposed on a side of the first side surface 101 away from the first end of the main arm 100. When the first stopper 310 contacts the second stopper 320, the friction between the first stopper 310 and the second stopper 320 can be overcome with a smaller force.
[0066] Specifically, the first limit member 310 is arranged on the side of the first side surface 101 away from the first end of the main arm 100, and the second limit member 320 on the first arm section 210 and the second limit member 320 on the second arm section 220 are both arranged on the side away from the other end of the first arm section 210, so that smaller force can be used to overcome friction, which is more labor-saving.
[0067] A specific embodiment of the second aspect of the utility model provides a working machine, which includes a working machine body and a boom device according to any one of the above embodiments; the boom device is connected to the working machine body.
[0068] Since the working machine includes the above-mentioned boom device, it has at least the above-mentioned advantages, which will not be described in detail here.
[0069] In the specific embodiment of the present invention, the type of the working machine is not limited, for example, the working machine can be a fire truck, a crane, an aerial work vehicle, etc. In other words, as long as the working machine can use the boom device in the embodiment of the present invention, it will be fine.
[0070] Furthermore, the operating machinery includes a fire truck.
[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.
Claims
1. A boom device, characterized in that: include: The arm frame body comprises a main arm (100) and an offset arm (200); the main arm (100) has a first side surface (101); one end of the offset arm (200) is rotatably connected to the first end of the main arm (100); the offset arm (200) can be switched between an extended state and a retracted state; in the retracted state, the offset arm (200) and the first side surface (101) of the main arm (100) form a clearance; A limiting structure (300) is arranged between the main arm (100) and the biasing arm (200) and is located in the clearance gap to prevent the biasing arm (200) from interfering with the main arm (100) during the process of unfolding or folding.
2. The boom device according to claim 1, characterized in that: The limiting structure (300) comprises: A first limiting member (310) is disposed on the first side surface (101); A second limiting member (320) is arranged on a side of the biasing arm (200) facing the first side surface (101); During the process of the biasing arm (200) being expanded or retracted, the second limiting member (320) is separated from or in contact with the first limiting member (310).
3. The boom device according to claim 2, characterized in that: The edge of the second limiting member (320) forms a first guiding inclined surface (321); during the process of the biasing arm (200) being expanded or retracted, the first guiding inclined surface (321) is separated from or slidably matched with the first limiting member (310).
4. The arm device according to claim 3, characterized in that: The second limiting member (320) is arranged on the arm mounting block (240) of the offset arm (200); the edge of the arm mounting block (240) forms a second guiding inclined surface (241), and the second guiding inclined surface (241) is used to provide an avoidance path for the first limiting member (310) to slide toward the first guiding inclined surface (321).
5. The boom device according to claim 2, characterized in that: The second limiting member (320) has a rolling portion; during the process of the biasing arm (200) being expanded or retracted, the rolling portion is separated from or rollingly engaged with the first limiting member (310).
6. The boom device according to any one of claims 2 to 5, characterized in that: The biasing arm (200) comprises: a first arm section (210), one end of the first arm section (210) being rotatably connected to the first end of the main arm (100), and at least one second stopper (320) being provided on a side of the first arm section (210) facing the first side surface (101); A second arm section (220), one end of the second arm section (220) being rotatably connected to the other end of the first arm section (210), and at least one second limiting member (320) is provided on a side of the second arm section (220) facing the first side surface (101).
7. The arm device according to claim 6, characterized in that: In the folded state, the second position-limiting member (320) of the first arm section (210) and the second position-limiting member (320) of the second arm section (220) are arranged along the width direction of the first side surface (101).
8. The boom device according to claim 7, characterized in that: The first limiting member (310) is arranged on a side of the first side surface (101) away from the first end of the main arm (100).
9. A working machine, characterized in that: It comprises an operating machine body, and a boom device as described in any one of claims 1 to 8; the boom device is connected to the operating machine body.
10. The working machine according to claim 9, characterized in that: The working machine includes a fire truck.