Cantilever crane anti-collision device, anti-collision oil cylinder and engineering machinery

Abstract

The utility model relates to the technical field of protective devices, and discloses a cantilever crane anti-collision device, an anti-collision oil cylinder and engineering machinery. The cantilever crane anti-collision device comprises a mounting seat, an elastic element, a protective cover, an air bag release element and a limiting element, the protective cover is elastically supported on the mounting base through an elastic element, a protective space is formed between the protective cover and the mounting base, and an air bag releasing element is arranged on the protective cover and provided with a protective air bag to be released; the limiting element is used for controlling the protective air bag to release and / or block the movement of the arm support when being triggered; the protective cover is used for compressing the elastic element and triggering the limiting element when the impact force is larger than the preset anti-collision force. The cantilever crane anti-collision device can cope with impact caused by inertial displacement, the anti-collision capacity is improved, and the cantilever crane anti-collision device is safer.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of protective devices, and particularly relates to an arm support anti-collision device, an anti-collision oil cylinder and engineering machinery. BACKGROUND

[0002] The arm support type operation machinery has a high operation height after the arm support is elongated, the arm support itself blocks the view of the operator, and in some operation scenes, there is a view blind area, so the operator cannot know the operation environment around each position of the arm support, and thus risks such as collision and impact cannot be avoided.

[0003] The power output of the arm support movement is derived from the arm support oil cylinder, and the most critical and fragile component of the arm support oil cylinder is the balance valve arranged outside the cylinder body. The balance valve may be directly damaged by collision, which may cause the hydraulic oil in the arm support oil cylinder to be ejected and leaked, the oil cylinder to lose pressure, the arm support posture to lose rotation constraint, and the arm support to rapidly fall, thereby causing a serious safety accident.

[0004] The existing protective measures for the oil cylinder mainly enhance the anti-collision ability of the protective cover or detect obstacles through sensors and cut off the power input of the driving mechanism in time. However, due to the slender structure of the arm support, even if the power input of the driving mechanism is cut off in time, the inertia displacement within the deflection range cannot be prevented, and thus the collision of the arm support cannot be prevented. Therefore, the existing protective measures cannot effectively solve the problem of arm support anti-collision. CONTENT OF THE UTILITY MODEL

[0005] The application aims to provide an arm support anti-collision device, an anti-collision oil cylinder and engineering machinery, which can solve the problem that the existing protective measures cannot effectively solve the problem of arm support anti-collision.

[0006] In order to achieve the above-mentioned purpose, the first aspect of the application provides an arm support anti-collision device, which comprises:

[0007] A mounting seat is arranged on the arm support;

[0008] An elastic element is arranged on the mounting seat;

[0009] A protective cover is elastically supported on the mounting seat by the elastic element, a protective space is formed between the protective cover and the mounting seat, an airbag release element is arranged on the protective cover, and the airbag release element has a protective airbag to be released;

[0010] A limiting element is arranged in the protective space, and the limiting element is used to control the release of the protective airbag and / or block the movement of the arm support when triggered;

[0011] The protective cover is used for compressing the elastic element and triggering the limiting element when the impact force is greater than the preset impact force.

[0012] As a further improvement of the above technical solution:

[0013] In some embodiments, the protective cover is provided with a triggering element for triggering the limiting element, and in the initial state, the triggering element is located above the triggering end of the limiting element.

[0014] The triggering element and the limiting element are impact triggered or inductively triggered.

[0015] In some embodiments, in the initial state, the distance from the triggering element to the triggering end of the limiting element is X, and the stroke of the protective cover when compressing the elastic element is D.

[0016] The preset impact force is Fimpact force=N*K*X, the impact force is Fimpact force=N*K*D, when D≥X, the limiting element is triggered, and in the formula, K is the elastic coefficient of the elastic element, and N is the number of the elastic element.

[0017] In some embodiments, the airbag release element and the limiting element are both communicatively connected with a controller, the controller is used for receiving the triggering signal sent by the limiting element, and according to the triggering signal, the controller controls the airbag release element to release the protective airbag, and / or, according to the triggering signal, the controller blocks the movement of the arm support.

[0018] In some embodiments, the limiting element is a travel switch, the protective cover is provided with a triggering element for triggering the travel switch, and the triggering element is a wedge-shaped block.

[0019] The triggering angle of the travel switch is P, the slope angle of the wedge-shaped block is Q, and P=Q is satisfied.

[0020] In some embodiments, the elastic element includes:

[0021] A guide is arranged on the mounting seat; and

[0022] An elastic buffer is arranged on the guide and used for supporting the protective cover.

[0023] In some embodiments, the protective cover is provided with a reinforcing rib near the inner wall of the protective space, the reinforcing rib is adapted to the shape of the inner wall and extends along the width direction of the inner wall.

[0024] In some embodiments, the protective cover includes at least one cover body, and the cover body is provided with a heat dissipation hole.

[0025] In order to achieve the above object, the second aspect of the present application provides an anti-collision cylinder for an arm support, comprising:

[0026] a cylinder body;

[0027] a balance valve assembly arranged on the cylinder body; and

[0028] According to the arm support anti-collision device provided in the first aspect, the mounting seat is arranged on the cylinder body, and the balance valve assembly is accommodated in the protection space.

[0029] As a further improvement of the above technical solution:

[0030] In some embodiments, the mounting seat comprises:

[0031] a base;

[0032] a clamping seat detachably arranged on the base and forming a constraint port matched with the shape of the cylinder body with the base;

[0033] wherein the cylinder body is in interference fit with the constraint port, or the cylinder body is provided with an anti-rotation block, and the clamping seat is provided with a clamping port clamping the anti-rotation block.

[0034] In order to achieve the above object, the third aspect of the present application provides an engineering machine comprising the arm support anti-collision device provided in the first aspect and / or the anti-collision cylinder for the arm support provided in the second aspect.

[0035] Compared with the prior art, the arm support anti-collision device, the anti-collision cylinder and the engineering machine provided by the present application at least have the following beneficial effects:

[0036] The arm support anti-collision device provided by the present application supports the protective cover and the mounting seat through the elastic element, forms a protection space between the protective cover and the mounting seat to protect the arm support and the functional components on the arm support, and uses the limiting element to control the release of the protective air bag and / or block the movement of the arm support when triggered. The protective cover is used to compress the elastic element and trigger the limiting element when the impact force received is greater than the preset anti-collision force. Thus, after the protective cover is impacted, the arm support anti-collision device provided by the present application can first offset part of the impact by compressing the elastic element under the elastic support of the elastic element, thereby achieving the effect of buffering and shock absorption. When the impact force is too large and greater than the preset anti-collision force, the elastic support of the elastic element itself cannot resist the impact force, the protective cover will compress the elastic element and further trigger the limiting element, and after the limiting element is triggered, the air bag release element can release the protective air bag on the surface of the protective cover to block the impact between the protective cover and the impact object, and also block the movement of the arm support, thereby effectively dealing with the impact caused by inertial displacement, improving the anti-collision ability, protecting the safety of the equipment and improving the safety of the operation.

[0037] Other features and advantages of the present embodiments will be made apparent by the following detailed description of the embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0038] The accompanying drawings are included to provide a further understanding of the present embodiments and are incorporated in and constitute a part of this specification, illustrate embodiments of the present embodiments and together with the description serve to explain the present embodiments. The drawings provided herein are for illustrative purposes only and represent a non-limiting example of possible structures in accordance with the present embodiments. Those of ordinary skill in the art will appreciate the structure illustrated in the drawings can be modified in various ways without departing from the application. In the drawings:

[0039] Figure 1 A partial structure schematic view of a first arm support anti-collision device provided by the present embodiments;

[0040] Figure 2 A partial structure schematic view of a second arm support anti-collision device provided by the present embodiments; Figure 1 A partial enlarged schematic view of A in FIG. 8;

[0041] Figure 3 A partial structure schematic view of a second arm support anti-collision device provided by the present embodiments; Figure 1 A schematic view of a cover body of a protective cover in the arm support anti-collision device shown in FIG. 9;

[0042] Figure 4 A schematic view of two arm support anti-collision devices provided by the present embodiments spliced by a connecting plate;

[0043] Figure 5 A partial structure schematic view of a second arm support anti-collision device provided by the present embodiments;

[0044] Figure 6 A partial enlarged schematic view of B in FIG. 10; Figure 5

[0045] Figure 7 A schematic view of the second arm support anti-collision device shown in FIG. 10 not subjected to impact; Figure 5

[0046] A schematic view of the second arm support anti-collision device shown in FIG. 10 subjected to impact; Figure 8 Figure 5 A schematic view of a collision-preventing oil cylinder provided by the present embodiments;

[0047] Figure 9 An exploded schematic view of a mounting seat in the collision-preventing oil cylinder provided by the present embodiments.

[0048] Figure 10 BRIEF DESCRIPTION OF DRAWINGS

[0049] BRIEF DESCRIPTION OF DRAWINGS

[0050] ​​100, arm support anti-collision device; 110, mounting seat; 111, base; 112, clamping seat; 1120, bayonet; 120, elastic element; 121, guide piece; 1210, first limiting part; 1211, guide part; 1212, second limiting part; 122, elastic buffer; 130, protective cover; 130a, protective space; 131, cover body; 1310, triggering element; 1311, mounting hole; 1312, reinforcing rib; 1313, heat dissipation hole; 1314, splicing hole; 132, connecting plate; 140, capsule body protection module; 141, air bag releasing element; 142, limiting element;

[0051] 200, oil cylinder body;

[0052] 300, balance valve assembly. DETAILED DESCRIPTION

[0053] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0054] The present application will be described in detail below with reference to the accompanying drawings and in combination with exemplary embodiments.

[0055] Embodiment one

[0056] Please refer to Figure 1 and Figure 2 The embodiment provides an arm support anti-collision device 100. The arm support anti-collision device 100 can protect the vulnerable components on the arm support, such as the balance valve or other sensors on the oil cylinder.

[0057] The arm support anti-collision device 100 provided by the embodiment includes a mounting seat 110, an elastic element 120, and a protective cover 130. The mounting seat 110 is arranged on the arm support and can be connected to the base body of the component to be protected on the arm support. In addition, the mounting seat 110 can also provide installation and support requirements for the elastic element 120 and the protective cover 130.

[0058] The elastic element 120 is arranged on the mounting seat 110, and the protective cover 130 is arranged on the elastic element 120. That is, the protective cover 130 is elastically supported on the mounting seat 110 by the elastic element 120. A protective space 130a is formed between the protective cover 130 and the mounting seat 110. In this way, the functional component to be protected on the arm support can be accommodated in the protective space 130a, so as to achieve protection by shielding the component with the protective cover 130.

[0059] In the embodiment, the protective cover 130 is elastically supported by the elastic element 120. In this way, the protective cover 130 can have a floating freedom relative to the mounting base 110 under the elastic support of the elastic element 120. In this way, when the protective cover 130 is impacted, the elastic support of the elastic element 120 can offset part of the impact, and the elastic element 120 can achieve the effect of buffering and shock absorption, thereby effectively achieving protection against inertia impact, improving the anti-collision ability, protecting the safety of the equipment, and improving the safety of the operation.

[0060] Further, the number of the elastic element 120 can be set to be multiple, and the multiple elastic elements 120 can provide stable support for the protective cover 130, while improving the anti-impact ability of the protective cover 130. It can be understood that the number of the elastic element 120 can be designed according to the anti-impact requirements of the boom. Different functional components on the boom have different anti-impact requirements, so the number of the elastic element 120 is also different. Therefore, the number of the elastic element 120 is not specifically limited in the embodiment.

[0061] The above-mentioned elastic element 120 includes a guide piece 121 and an elastic buffer piece 122. The guide piece 121 is arranged on the mounting base 110, and the elastic buffer piece 122 is arranged on the guide part 1211 and used to elastically support the protective cover 130.

[0062] Specifically, the guide piece 121 includes a first limiting part 1210, a guide part 1211, and a second limiting part 1212 arranged in sequence along the length direction of the guide piece 1210. The first limiting part 1210 is connected to the mounting base 110, the guide part 1211 passes through the mounting hole 1311 arranged on the protective cover 130 and is in clearance fit with the mounting hole 1311, and the second limiting part 1212 is located on the side of the protective cover 130 away from the mounting base 110. The width dimension of the second limiting part 1212 is greater than the dimension of the mounting hole 1311.

[0063] The elastic buffer piece 122 can be a compression spring, which is sleeved on the guide part 1211, and the two ends of the elastic buffer piece 122 are in abutment with the mounting base 110 and the protective cover 130, respectively. The elastic buffer piece 122 has an elastic deformation capability, so as to provide support for the protective cover 130 and ensure that the protective cover 130 has a floating freedom along the length direction of the guide part 1211.

[0064] Alternatively, the guide piece 121 can be an assembly of a bolt and a nut, in which the first limiting part 1210 is the head of the bolt, the guide part 1211 is a screw rod, and the second limiting part 1212 can be a nut. The nut can be screwed on the screw rod to limit the protective cover 130 from being removed from the screw rod. The elastic buffer piece 122 is sleeved on the screw rod.

[0065] Optionally, the elastic buffer 122 can also be a spring sheet or an air spring, etc. It should be understood that the above is only an example and is not intended to limit the scope of protection of the present application.

[0066] Please refer to Figure 3 In the embodiment, the protective cover 130 is formed by bending a whole plate into a U-shaped structure, so that the protective cover 130 has better impact deformation resistance. Of course, in other embodiments, multiple plates can also be welded to form a shape.

[0067] Please refer to Figure 3 In some embodiments, the protective cover 130 is provided with a reinforcing rib 1312 on the inner wall of the protective space 130a. The reinforcing rib 1312 is adapted to the shape of the inner wall and extends along the width direction of the inner wall. In this way, the deformation resistance of the protective cover 130 is provided.

[0068] Optionally, a plurality of reinforcing ribs 1312 can be designed, and the plurality of reinforcing ribs 1312 are arranged at intervals along the length direction of the protective cover 130.

[0069] Optionally, the reinforcing rib 1312 and the protective cover 130 are integrally formed or connected by welding.

[0070] Please refer to Figure 1 and Figure 3 In some embodiments, the protective cover 130 is provided with a plurality of mounting holes 1311 along the length direction of the protective cover 130, and the elastic element 120 passes through the mounting hole 1311 and is connected with the mounting seat 110. In this way, different mounting holes 1311 can be selected to be connected with the elastic element 120, so as to adjust the mounting position of the protective cover 130 on the mounting seat 110, so as to better protect the components.

[0071] Please refer to Figure 1 , Figure 3 and Figure 4 In some embodiments, the protective cover 130 further comprises at least one cover body 131. It can be understood that the protective cover 130 can also have only one cover body 131, i.e., used alone. Of course, multiple cover bodies 131 can also be used in combination.

[0072] When multiple cover bodies 131 are used in combination, both ends of each cover body 131 are provided with a splicing hole 1314 for connecting with an adjacent cover body 131. The protective cover 130 further comprises a connecting plate 132, which is installed on the splicing hole 1314 through the connecting plate 132, so as to connect the two adjacent cover bodies 131.

[0073] Optionally, the connecting plate 132 and the cover body 131 are detachably connected by fasteners (bolts or screws).

[0074] In this way, when the length of the single cover 131 is not enough, the covers 131 can be spliced by the connecting plate 132 to lengthen the entire protective cover 130 and increase the protection area. Of course, the connection between the cover 131 and the cover 131 between the two arm support anti-collision devices 100 can also be realized, thereby improving the stability of the installation of the arm support anti-collision device 100 and the protection range.

[0075] Further, the cover 131 of the protective cover 130 is provided with a plurality of heat dissipation holes 1313 to facilitate heat dissipation of the components and prevent the components from being affected by insufficient heat dissipation during operation.

[0076] Further, in the embodiment, the arm support anti-collision device 100 further comprises a capsule protection module 140. The capsule protection module 140 comprises a gas bag release element 141 and a limiting element 142 linked with the gas bag release element 141. The gas bag release element 141 is arranged on the protective cover 130, and the gas bag release element 141 comprises a gas generator (not shown in the figure) and a gas bag (not shown in the figure) to be released, and the gas generator is used to charge the gas bag with gas.

[0077] The limiting element 142 is arranged in the protection space 130a, and can be arranged on the mounting seat 110 or the base body on the arm support. In the embodiment, the limiting element 142 arranged on the mounting seat 110 is taken as an example for illustration.

[0078] The protective cover is used to compress the elastic element and trigger the limiting element when the impact force received is greater than the preset anti-collision force. The limiting element 142 is used to control the release of the protective gas bag and / or block the movement of the arm support when triggered. It can be understood that the gas bag release element 141 releases the protective gas bag on the surface of the protective cover 130 to form a barrier between the protective cover 130 and the collision object to prevent the collision from occurring again.

[0079] The gas bag release element 141 and the limiting element 142 are both connected with a controller, specifically in a communication connection mode, which includes wired communication or wireless communication. In this way, the controller receives the trigger signal fed back by the limiting element 142 to control the gas generator in the gas bag release element 141 to instantaneously charge the protective gas bag with gas, so that the protective gas bag expands and releases, thereby blocking between the protective cover 130 and the collision object, further improving the protection effect, and realizing the linkage of the gas bag release element 141 and the limiting element 142.

[0080] The protective cover 130 is provided with a trigger element 1310 for triggering the limiting element 142. The state of the protective cover 130 when no collision occurs is defined as the initial state, in which state the elastic element 140 normally elastically supports the protective cover 130, and the trigger element 1310 is located above the trigger end of the limiting element 142.

[0081] Please refer to Figure 7 and Figure 8 In order to more clearly describe the technical solutions of the embodiments, in the embodiments, the position of the initial state of the trigger element 1310 is defined as the non-trigger position (as shown in Figure 7 ); and the position of the trigger element 1310 when the protective cover 130 is impacted (hit) to drive the trigger limiting element 142 is defined as the trigger position (as shown in Figure 8 ). Thus, when the trigger element 1310 moves to the trigger position, the limiting element 142 is triggered and feeds back a trigger signal to the controller, and the controller controls the gas generator to work according to the trigger signal. Thus, the gas generator rapidly fills a large amount of gas into the airbag, so that the airbag is instantaneously inflated and released, and the airbag rapidly isolates the protective cover 130 from the colliding object, thereby preventing further collision caused by the inertial displacement.

[0082] Optionally, the gas is colored fluorescent gas, and if the impact is very large, the airbag is burst, so that the collision position can be easily known.

[0083] In some embodiments, a plurality of airbag release elements 141 can be arranged on the periphery of the protective cover 130 to achieve multi-angle and multi-directional protection.

[0084] Please refer to Figure 8 In the embodiments, the distance from the trigger element 1310 to the trigger end of the limiting element 142 is defined as X, and the stroke of the elastic element 120 when the protective cover 130 collides is defined as D.

[0085] wherein the preset anti-collision force is F 防撞力 =N*K*X, and the impact force is F 撞击力 =N*K*D, wherein K is the elastic coefficient of the elastic element 120, and N is the number of the elastic element 120. When D≥X, the limiting element 142 is triggered. Thus, the size of the preset anti-collision force F 防撞力 can be adjusted by changing the number N and the elastic coefficient K of the elastic element 120.

[0086] Optionally, the trigger element 1310 is a wedge-shaped block, and the limiting element 142 can be a travel switch. As shown in Figure 8 , the trigger angle of the travel switch is P, and the slope angle of the wedge-shaped block is Q, wherein P=Q.

[0087] In some embodiments, the limiting element 142 can also be a proximity switch, a Hall sensor, a laser sensor or an infrared sensor, etc. The trigger element 1310 can be replaced as appropriate. It should be understood that the above are only illustrative and are not intended to limit the protection scope of the present application.

[0088] In some embodiments, when the arm frame anti-collision device 100 provided in the embodiments is applied to the engineering machinery, the controller can further control the engineering machinery to cut off the power source input of the arm frame when receiving the trigger signal fed back by the limiting element 142, so as to block the movement of the arm frame.

[0089] Compared with the prior art, the arm frame anti-collision device provided in the embodiments can first offset part of the impact by compressing the elastic element 120 to achieve the effect of buffering and shock absorption when the protective cover 130 is hit due to the elastic support of the elastic element 120 to the protective cover 130, and when the impact force is too large and greater than the preset anti-collision force.

[0090] Further, when the impact force is greater than the preset anti-collision force F 防撞力 , the elastic support of the elastic element 120 itself cannot resist the impact force, at this time, the protective cover 130 will further move towards the installation base 110, thereby further compressing the elastic element 120 to trigger the limiting element 142, and after the limiting element 142 is triggered, the air bag releasing element 141 can release the protective air bag on the surface of the protective cover 130 to block the impact between the protective cover 130 and the collision object, and also to block the movement of the arm frame. In this way, the impact caused by the inertial displacement can be effectively dealt with, the anti-collision capability can be improved, the safety of the equipment can be protected, and the operation safety can be improved.

[0091] Embodiment Two

[0092] Please refer to Figures 1 to 9 , the embodiment provides an anti-collision oil cylinder. The anti-collision oil cylinder comprises the arm frame anti-collision device 100 provided in the above-mentioned embodiment one or embodiment two.

[0093] The anti-collision oil cylinder further comprises an oil cylinder body 200 and a balance valve assembly 300 arranged on the cylinder body of the oil cylinder body 200. The balance valve assembly 300 comprises a valve body and an oil pipe connected with the valve body.

[0094] Further, the installation base 110 in the arm frame anti-collision device 100 is arranged on the cylinder body, and the balance valve assembly 300 is accommodated in the protective space 130a. In this way, the balance valve assembly 300 is effectively protected by the arm frame anti-collision device 100.

[0095] Please refer to Figure 10 , in the embodiment, the above-mentioned installation base 110 comprises a base 111 and a clamping seat 112; the clamping seat 112 is detachably arranged on the base 111 and forms a constraint port matched with the shape of the cylinder body with the base 111, and the cylinder body is in interference fit with the constraint port.

[0096] Further, the number of the mounting seat 110 can be set to be multiple, and the multiple mounting seats 110 are distributed along the length direction of the protective cover 130 respectively. The limiting element 142 is arranged on the clamping seat of one of the mounting seats 110.

[0097] In some embodiments, the clamping seat 112 in at least one of the mounting seats 110 is provided with a clamping opening 1120 for clamping the anti-rotation block, and the corresponding cylinder is provided with the anti-rotation block. In this way, the rotation of the arm support anti-collision device 100 relative to the cylinder is limited by the cooperation of the base 111 and the clamping seat 112, the stability after installation is improved, and the protection effect is guaranteed.

[0098] Optionally, the detachable connection between the clamping seat 112 and the base 111 includes riveting, screw or bolt connection.

[0099] It can be understood that the detachable connection between the base 111 and the clamping seat 112 in the mounting seat 110 can facilitate the installation and position adjustment of the base 111 on the cylinder. Of course, in some embodiments, the mounting seat 110 can be selected as a clamp structure.

[0100] Embodiment three

[0101] Please refer to Figures 1 to 10 The embodiment provides an engineering machine, which comprises the arm support anti-collision device 100 provided in the above embodiment one, and / or the anti-collision cylinder provided in the above embodiment two.

[0102] Optionally, the engineering machine can be a pump truck, an aerial work platform or a fire ladder truck.

[0103] It should be noted that in the present application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0104] The structure of the cylinder, the balance valve and the gas generator is well known to those skilled in the art, and does not belong to the core improvement part of the present application, so it will not be described here.

[0105] In the description of the application, it should be understood that the terms "first", "second" are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0106] In this application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or communicate with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0107] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application. In this specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0108] Although the embodiments of the application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be construed as limiting the application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the application.

Claims

1. An anti-collision device for an arm support, characterized in that, The utility model relates to a kind of safety protection device for arm support, including: Mounting seat (110) for being arranged on arm support; Resilient element (120) is arranged on the mounting seat (110); Protective cover (130) is elastically supported on the mounting seat (110) by the resilient element (120), and protective space (130a) is formed between the protective cover (130) and the mounting seat (110), air bag release element (141) is equipped on the protective cover (130), and the air bag release element (141) has protective air bag to be released; Limiting element (142) is arranged in the protective space (130a), and the limiting element (142) is used to control the protective air bag release and / or block the movement of the arm support when being triggered; Wherein, the protective cover (130) is used to compress the resilient element (120) and can trigger the limiting element (142) when the impact force received is greater than preset anti-collision force.

2. The boom anti-collision device of claim 1, wherein, Trigger element (1310) for triggering the limiting element (142) is equipped on the protective cover (130), and in initial state, the trigger element (1310) is located above the trigger end of the limiting element (142); Wherein, the trigger element (1310) and the limiting element (142) are impact trigger or inductive trigger.

3. The boom anti-collision device of claim 2, wherein, When defining initial state, the distance from the trigger element (1310) to the trigger end of the limiting element (142) is X, and the stroke of the protective cover (130) when colliding to compress the resilient element (120) is D; Wherein, the preset anti-collision force is F 防撞力 = N * K * X, the impact force is F 撞击力 = N * K * D, when D ≥ X, the limiting element (142) is triggered, wherein K is the elastic coefficient of the elastic element (120), and N is the number of the elastic element (120).

4. The boom anti-collision device of claim 1, wherein, The air bag release element (141) and the limiting element (142) are both communicatively connected with controller, and the controller is used to receive the trigger signal emitted by the limiting element (142), and according to the trigger signal, the air bag release element (141) is controlled to release the protective air bag, and / or, according to the trigger signal, the movement of the arm support is blocked.

5. The boom anti-collision device according to any of claims 1-4, characterized in that, The limiting element (142) is a travel switch, trigger element (1310) for triggering the travel switch is equipped on the protective cover (130), and the trigger element (1310) is wedge-shaped block; Wherein, the trigger angle of the travel switch is P, and the slope angle of the wedge-shaped block is Q, and P=Q is met.

6. The boom anti-collision device of claim 1, wherein, The resilient element (120) includes: Guide (121) is arranged on the mounting seat (110);And Resilient buffer (122) is arranged on the guide (121), and is used to support the protective cover (130).

7. The boom anti-collision device of claim 1, wherein, Reinforcing rib (1312) is equipped on the inner wall of the protective cover (130) close to the protective space (130a), and the reinforcing rib (1312) is adapted to the shape of the inner wall and extends along the width direction of the inner wall.

8. The boom anti-collision device of claim 1, wherein, The protective cover (130) includes at least one cover body (131), and the cover body (131) is equipped with heat dissipation hole (1313).

9. An anti-collision cylinder for an arm, characterized in that Including: Oil cylinder body (200); Balance valve assembly (300) is arranged on the cylinder body of the oil cylinder body (200); And The arm support anti-collision device (100) according to any one of claims 1-8, wherein the mounting seat (110) is arranged on the cylinder body, and the balance valve assembly (300) is accommodated in the protection space (130a).

10. The anti-collision oil cylinder for an arm support according to claim 9, characterized by The mounting seat (110) comprises: a base (111); a clamping seat (112) which is detachably arranged on the base (111) and forms a constraint opening matched with the shape of the cylinder body with the base (111); wherein the cylinder body is in interference fit with the constraint opening, or the cylinder body is provided with an anti-rotation block, and the clamping seat (112) is provided with a clamping opening (1120) for clamping the anti-rotation block.

11. A working machine, characterized in that The arm support anti-collision device (100) according to any one of claims 1-8, and / or the anti-collision oil cylinder for the arm support according to any one of claims 9-10.

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