Support mechanism and engineering machine

Abstract

The present disclosure provides a support mechanism and an engineering machine. The support mechanism comprises a first telescopic part, a second telescopic part, and a locking mechanism. The locking mechanism comprises a locking pin. The first telescopic part is provided with a plurality of positioning holes distributed along a telescopic direction of the support mechanism. The support mechanism has a locked state and an unlocked state. In the locked state, the locking pin selectively cooperates with one of the plurality of positioning holes, so that the first telescopic part and the second telescopic part can be kept fixed. In the unlocked state, the locking pin is separated from the positioning hole, so that the first telescopic part and the second telescopic part can move relative to each other. The locking pin is provided with a guide structure. In the locked state, the guide structure can guide the locking pin out of the positioning hole under the action of a first driving force, so that the support mechanism switches to the unlocked state. The support mechanism remains in the locked state under the action of a second driving force. The first driving force and the second driving force are driving forces for extending and retracting the second telescopic part relative to the first telescopic part along the telescopic direction in the unlocked state.

Description

Technical Field

[0001] This disclosure relates to the field of mechanical structures, and in particular to a support mechanism and engineering machinery. Background Technology

[0002] Support mechanisms are commonly used in construction machinery to lock and support heavy-load equipment such as lifts. Construction machinery often operates in harsh environments, and the ease of operation, reliability, and load-bearing capacity of support mechanisms for heavy-load equipment still need improvement. Summary of the Invention

[0003] The purpose of this disclosure is to provide a support mechanism and engineering machinery to improve the ease of operation and reliability of the support mechanism.

[0004] A first aspect of this disclosure provides a support mechanism, the support mechanism comprising:

[0005] First telescopic section;

[0006] The second telescopic portion is movably disposed relative to the first telescopic portion to allow the support mechanism to extend and retract; and

[0007] A locking mechanism is installed on the second telescopic part. The locking mechanism includes a locking pin. The first telescopic part is provided with a plurality of positioning holes distributed along the telescopic direction of the support mechanism. The support mechanism has a locked state and an unlocked state. In the locked state, the locking pin can selectively cooperate with one of the plurality of positioning holes to keep the first telescopic part and the second telescopic part fixed. In the unlocked state, the locking pin disengages from the positioning hole to allow the first telescopic part and the second telescopic part to move relative to each other.

[0008] The locking pin is provided with a guide structure. In the locked state, the guide structure can guide the locking pin out of the positioning hole under the action of a first driving force, so that the support mechanism switches to the unlocked state. The support mechanism maintains the locked state under the action of a second driving force.

[0009] Of the first driving force and the second driving force, one is a driving force that causes the second telescopic part to extend relative to the first telescopic part along the telescopic direction in the unlocked state, and the other is a driving force that causes the second telescopic part to retract relative to the first telescopic part along the telescopic direction in the unlocked state.

[0010] According to some embodiments of this disclosure, the guide structure includes a guide surface disposed at the first end of the locking pin. Under the action of the first driving force, the second telescopic part can move relative to the first telescopic part, and during the movement, the guide surface abuts against the edge of the positioning hole near the end of the second telescopic part.

[0011] According to some embodiments of this disclosure, along the telescopic direction, the guide surface gradually approaches the second end of the locking pin from one side of the telescopic direction to the other side, and in the locked state, the edge of the guide surface on the side near the second end of the locking pin is outside the positioning hole.

[0012] According to some embodiments of this disclosure, the guide surface includes a plane inclined from one side of the telescopic direction to the other.

[0013] According to some embodiments of this disclosure, the locking mechanism includes:

[0014] A locking pin drive device, connected to and configured to drive the locking pin out of the positioning hole to switch the support mechanism from the locked state to the unlocked state; and / or

[0015] A force-applying component is configured to apply a force to the locking pin to maintain the locking pin in engagement with the positioning hole.

[0016] According to some embodiments of this disclosure, the locking mechanism includes two locking pins, and the first telescopic portion is provided with two sets of positioning holes corresponding to the two locking pins. Each set of positioning holes includes a plurality of positioning holes distributed along the telescopic direction.

[0017] The locking pin driving device includes a hydraulic cylinder and two connecting rods corresponding to the two locking pins. The first end of each connecting rod is rotatably connected to the corresponding locking pin, and the second end of each connecting rod is rotatably connected to one end of the hydraulic cylinder; and / or

[0018] The force-applying component includes a spring disposed between the two locking pins, and the two locking pins are kept in a cooperating state with the positioning hole by the elastic force of the spring.

[0019] According to some embodiments of this disclosure, the axis of rotation of the connecting rod relative to one end of the hydraulic cylinder is movably arranged along the length direction of the connecting rod.

[0020] According to some embodiments of this disclosure, the locking mechanism includes a first hinge shaft disposed at one end of the hydraulic cylinder, and a hinge point hole is provided at the second end of the connecting rod. The hinge point hole is an elongated hole and its length direction extends along the length direction of the connecting rod. The first hinge shaft is fitted into the hinge point hole and is movably disposed relative to the hinge point hole along the length direction of the connecting rod.

[0021] According to some embodiments of this disclosure, the locking mechanism includes a spring mounting portion disposed on the locking pin, the end of the spring being mounted on the spring mounting portion, and the spring mounting portion corresponding to one of the locking pins protruding toward the other locking pin.

[0022] According to some embodiments of this disclosure, the first telescopic part and the second telescopic part are box-shaped structures, the first telescopic part is fitted outside the second telescopic part, and the dimensions of the first telescopic part and the second telescopic part along the first direction are greater than the dimensions along the second direction, wherein the first direction and the second direction are both perpendicular to the telescopic direction, and the first direction is perpendicular to the second direction.

[0023] According to some embodiments of the present disclosure, a roller is included, at least one of the rollers being disposed between and in contact with the first telescopic portion and the second telescopic portion, the roller being configured to roll as the first telescopic portion and the second telescopic portion move relative to each other.

[0024] A second aspect of this disclosure provides an engineering machine that includes the support mechanism described in the first aspect of this disclosure.

[0025] The support mechanism provided in this disclosure can achieve a one-way self-locking function. During use, under the action of a first driving force, the first telescopic part can move relative to the second telescopic part without prior unlocking; even when subjected to a second driving force opposite to the direction of the first driving force, it can remain locked, thereby maintaining the stability of the supported object. Therefore, this support mechanism combines ease of operation with reliability. The engineering machinery provided in this disclosure possesses the advantages of this support mechanism.

[0026] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this application, illustrate exemplary embodiments of this disclosure and are used to explain this disclosure, but do not constitute an undue limitation of this disclosure. In the drawings:

[0028] Figure 1 and Figure 2 This is a schematic diagram of the support mechanism of some embodiments of the present disclosure, wherein... Figure 1 and Figure 2 The central locking pins engage with different positioning holes on the first telescopic part.

[0029] Figure 3 for Figure 1 The diagram shows the structure of the second support part and the locking mechanism of the support mechanism.

[0030] Figure 4 This is a schematic diagram of the locking mechanism of the support mechanism in some embodiments of this disclosure.

[0031] Figure 5 for Figure 4 The diagram shows a planar structure of the locking mechanism.

[0032] Figure 6 for Figure 4 The diagram shows the structure of the locking pin of the locking mechanism.

[0033] Figure 7 for Figure 6 The diagram shows the planar structure of the locking pin.

[0034] Figure 8 and Figure 9 This is a schematic diagram illustrating the process by which the locking pin is guided out of the positioning hole through the guide surface in some embodiments of this disclosure.

[0035] Figure 10 This is a schematic diagram illustrating the process of the locking pin being guided out of the positioning hole through the guide surface in some other embodiments of this disclosure.

[0036] Figure 11 This is a schematic diagram illustrating the force situation of the locking pin as it exits the positioning hole through the guide surface in some embodiments of this disclosure.

[0037] Figures 1 to 11 In the figures, the labels represent:

[0038] 1. First telescopic part; 10. Positioning hole;

[0039] 2. Second telescopic section;

[0040] 3. Locking mechanism; 31. Locking pin; 310. Guide structure; 311. Guide surface; 312. Hinge hole; 32. Locking pin drive device; 321. Hydraulic cylinder; 33. Connecting rod; 330. Hinge point hole; 34. Force-applying component; 341. Spring; 35. First hinge shaft; 36. Second hinge shaft; 37. Spring mounting part; 38. Connecting seat; 39. Cotter pin;

[0041] 4. Rollers;

[0042] 5. First hinge lug;

[0043] 6. Second hinge;

[0044] 7. Locking mechanism installation section. Detailed Implementation

[0045] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0046] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this disclosure. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0047] In the description of this disclosure, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this disclosure.

[0048] In the description of this disclosure, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this disclosure and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this disclosure; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0049] refer to Figures 1 to 11Some embodiments of this disclosure provide a support mechanism, including a first telescopic part 1, a second telescopic part 2, and a locking mechanism 3.

[0050] The second telescopic part 2 is movably disposed relative to the first telescopic part 1 so that the support mechanism can extend and retract.

[0051] The locking mechanism 3 is mounted on the second telescopic part 2. The locking mechanism 3 includes a locking pin 31. The first telescopic part 1 is provided with a plurality of positioning holes 10 distributed along the telescopic direction X of the support mechanism. The support mechanism has a locked state and an unlocked state. In the locked state, the locking pin 31 can selectively engage with one of the plurality of positioning holes 10 so that the first telescopic part 1 and the second telescopic part 2 can remain fixed. In the unlocked state, the locking pin 31 disengages from the positioning hole 10 so that the first telescopic part 1 and the second telescopic part 2 can move relative to each other.

[0052] The locking pin 31 is provided with a guide structure 310. In the locked state, the guide structure 310 can guide the locking pin 31 out of the positioning hole 10 under the action of the first driving force, so that the support mechanism switches to the unlocked state. The support mechanism remains locked under the action of the second driving force. Of the first driving force and the second driving force, one is the driving force that causes the second telescopic part 2 to extend relative to the first telescopic part 1 along the telescopic direction X in the unlocked state, and the other is the driving force that causes the second telescopic part 2 to retract relative to the first telescopic part 1 along the telescopic direction X in the unlocked state.

[0053] For example, the first driving force is the driving force that causes the second telescopic part 2 to extend relative to the first telescopic part 1 along the telescopic direction X in the unlocked state, and the second driving force is the driving force that causes the second telescopic part 2 to retract relative to the first telescopic part 1 along the telescopic direction X in the unlocked state. In the locked state, under the action of the first driving force, the second telescopic part 2 tends to extend relative to the first telescopic part 1, and the guide structure 310 can guide the locking pin 31 out of the positioning hole 10 so that the second telescopic part 2 extends relative to the first telescopic part 1; while under the action of the second driving force, the locking pin 31 can maintain the engagement state with the positioning hole 10, thereby preventing the second telescopic part 2 from retracting relative to the first telescopic part 1. In this state, the self-locking direction of the support mechanism is the direction that causes the second telescopic part 2 to retract relative to the first telescopic part 1 along the telescopic direction X.

[0054] For example, the first driving force is the driving force that causes the second telescopic part 2 to retract relative to the first telescopic part 1 along the telescopic direction X in the unlocked state, and the second driving force is the driving force that causes the second telescopic part 2 to extend relative to the first telescopic part 1 along the telescopic direction X in the unlocked state. In the locked state, under the action of the first driving force, the second telescopic part 2 tends to retract relative to the first telescopic part 1, and the guide structure 310 can guide the locking pin 31 out of the positioning hole 10 so that the second telescopic part 2 retracts relative to the first telescopic part 1; while under the action of the second driving force, the locking pin 31 can maintain the engagement state with the positioning hole 10, thereby preventing the second telescopic part 2 from extending relative to the first telescopic part 1. In this state, the self-locking direction of the support mechanism is the direction in which the second telescopic part 2 extends relative to the first telescopic part 1 along the telescopic direction X.

[0055] Therefore, the support mechanism provided in the embodiments of this disclosure can achieve a one-way self-locking function. In use, under the action of the first driving force, the first telescopic part can move relative to the second telescopic part without prior unlocking; and even when subjected to a second driving force opposite to the direction of the first driving force, it can remain locked, thereby keeping the supported object stable. Therefore, this support mechanism has both ease of operation and reliability.

[0056] The support mechanism provided in the embodiments of this disclosure is suitable for heavy-load engineering machinery equipment, such as a working platform for supporting engineering machinery. The first telescopic part 1 and the second telescopic part 2 can be connected to different components of the engineering machinery through the first hinge 5 and the second hinge 6, respectively.

[0057] To lift the work platform, the support mechanism can move along with the movement of its drive mechanism, making operation convenient. Furthermore, even if the drive mechanism of the support mechanism is unloaded, the support mechanism can still prevent the work platform from falling under its own weight. Therefore, the support mechanism of the embodiments of this disclosure enables the working device of construction machinery to operate safely, stably, and reliably, facilitating the expansion of the application range of construction machinery.

[0058] In some embodiments, reference Figures 4 to 11 The guide structure 310 includes a guide surface 311, which is disposed at the first end of the locking pin 31. Under the action of the first driving force, the second telescopic part 2 can move relative to the first telescopic part 1, and during the movement, the guide surface 311 abuts against the edge of the positioning hole 10 near the end of the second telescopic part 2.

[0059] Based on the guide structure of the above embodiment, under the action of the first driving force, during the process of the second telescopic part moving relative to the first telescopic part in the telescopic direction, the guide surface and the edge of the positioning hole near the second telescopic part can maintain stable contact, which is beneficial to improving the motion reliability of the support mechanism.

[0060] In some embodiments, reference Figures 4 to 11 Along the telescopic direction X, the guide surface 311 gradually approaches the second end of the locking pin 31 from one side to the other side. In the locked state, the edge of the guide surface 311 on the side close to the second end of the locking pin 31 is outside the positioning hole 10.

[0061] The aforementioned guide surface configuration facilitates the smooth exit of the locking pin from the positioning hole. Depending on the characteristics of the first driving force acting on the support mechanism, the guide surface may include a plane, a curved surface, or a combination of a plane and a curved surface.

[0062] In some embodiments, reference Figures 4 to 11 The guide surface 311 includes a plane that is inclined from one side to the other in the telescopic direction X.

[0063] In the support mechanism of the above embodiment, the guide surface is a plane that is inclined relative to the direction of extension and retraction, which makes the movement of the locking pin more stable during the process of being guided out of the positioning hole, and also facilitates the processing of the locking pin.

[0064] In some embodiments, reference Figures 4 to 11 The locking mechanism 3 includes a locking pin drive device 32, which is drivenly connected to the locking pin 31 and configured to drive the locking pin 31 out of the positioning hole 10 to switch the support mechanism from the locked state to the unlocked state.

[0065] The locking pin drive device can actively disengage the locking pin from the positioning hole, so that the support mechanism can actively switch to the unlocked state, facilitating the reset of the first and second telescopic parts.

[0066] To prevent the first and second telescopic parts from moving in the direction requiring self-locking, and to ensure the support mechanism operates more safely and reliably in the locked state, in some embodiments, reference is made to... Figures 4 to 11 The locking mechanism 3 includes a force-applying component 34, which is configured to apply a force to the locking pin 31 to maintain the locking pin 31 in a mating state with the positioning hole 10.

[0067] In some embodiments, the locking mechanism 3 includes a combination of the locking pin drive device 32 and the force application component 34 described above.

[0068] In some embodiments, reference Figures 4 to 11 The locking mechanism 3 includes two locking pins 31. The first telescopic part 1 is provided with two sets of positioning holes 10 corresponding to the two locking pins 31. Each set of positioning holes 10 includes multiple positioning holes 10 distributed along the telescopic direction X. The locking pin driving device 32 includes a hydraulic cylinder 321 and two connecting rods 33 corresponding to the two locking pins 31. The first end of the connecting rod 33 is rotatably connected to the corresponding locking pin 31, and the second end of the connecting rod 33 is rotatably connected to one end of the hydraulic cylinder 321.

[0069] Optionally, in some embodiments, the drive device 32 may also employ a telescopic drive component such as a cylinder or an electric cylinder. (See reference) Figure 4 and Figure 5 The locking mechanism 3 also includes a connecting seat 38 disposed at one end of the hydraulic cylinder 321, and the second ends of the two connecting rods 33 are respectively connected to the end of the hydraulic cylinder 321 through the connecting seat 38.

[0070] In some embodiments, reference Figures 4 to 11 The locking mechanism 3 includes two locking pins 31. The first telescopic part 1 is provided with two sets of positioning holes 10 corresponding to the two locking pins 31. Each set of positioning holes 10 includes multiple positioning holes 10 distributed along the telescopic direction X. The force-applying component 34 includes a spring 341 disposed between the two locking pins 31. The two locking pins 31 are kept in a cooperating state with the positioning holes 10 by the elastic force of the spring 341.

[0071] The number of springs 341 can be one or more, for example, refer to Figure 4 and Figure 5 Two locking pins 31 are coaxially arranged, and two springs 341 are arranged side by side along the radial direction of the locking pins 31.

[0072] In some embodiments, the locking mechanism 3 includes a combination of the aforementioned cylinder 321, connecting rod 33, and spring 341.

[0073] In some embodiments, reference Figure 5 The axis of rotation of the connecting rod 33 relative to one end of the oil cylinder 321 is movably set along the length of the connecting rod 33.

[0074] In the locking mechanism of the above embodiment, under the action of the first driving force, the guide surface of the locking pin gradually disengages from the positioning hole due to the force exerted on the edge of the positioning hole. The locking pin drives the connecting rod to move, while the end of the hydraulic cylinder remains stationary. Since the axis of rotation of the connecting rod relative to one end of the hydraulic cylinder is movably set along the length direction of the connecting rod, the connecting rod is not easily constrained by the end of the hydraulic cylinder during movement, and will not hinder the locking pin from smoothly disengaging from the positioning hole. This reduces the impact on the movement of the second telescopic part relative to the first telescopic part in the telescopic direction, thereby improving the convenience and reliability of the control support mechanism.

[0075] In some embodiments, reference Figures 5 to 7 The locking mechanism 3 includes a first hinge shaft 35, which is disposed at one end of the hydraulic cylinder 321. The second end of the connecting rod 33 is provided with a hinge point hole 330. The hinge point hole 330 is an elongated hole and its length direction extends along the length direction of the connecting rod 33. The first hinge shaft 35 is fitted and installed in the hinge point hole 330 and is movably disposed relative to the hinge point hole 330 along the length direction of the connecting rod 33.

[0076] Optionally, the hydraulic cylinder 321 can be installed inside the second telescopic part 2 via the locking mechanism mounting part 7. Optionally, the second end of the connecting rod 33 is connected to the connecting seat 38 via the first hinge shaft 35. The locking pin 31 is provided with a hinge hole 312 whose axis is radially arranged along the locking pin 31. The second hinge shaft 36 cooperates with the hinge hole 312, and the first end of the connecting rod 33 is hinged to the corresponding locking pin 31 via the second hinge shaft 36. Optionally, the locking mechanism includes cotter pins 39, and multiple cotter pins 39 are respectively provided at the end of each second hinge shaft 36 to prevent the second hinge shaft 36 from loosening. The same end of the first hinge shaft 35 corresponding to the two connecting rods 33 can be connected by a cotter pin 39.

[0077] The following is combined Figures 8 to 11 The working principle of the support mechanism in some embodiments of this disclosure will be further explained.

[0078] Figure 8 and Figure 9 In the support mechanism shown, the guide surface 311 gradually approaches the plane of the second end of the locking pin 31 from the left to the right in the figure. The first driving force is the driving force that causes the second telescopic part 2 to extend relative to the first telescopic part 1 in the telescopic direction X when it is unlocked.

[0079] Under the action of the first driving force, the second telescopic part 2 tends to extend relative to the first telescopic part 1, according to Figure 8 Move to the right from the center, refer to Figure 11 It can be seen that at this time, the locking pin 31 is subjected to a force F pointing towards the guide surface 311 and perpendicular to the guide surface 311. The component force Fx along the extension direction is balanced with the reaction force provided by the positioning hole 10, while the component force Fy along the axis of the locking pin 31 pushes the locking pin 31 to move in the direction of disengaging from the positioning hole 10. When the locking pin 31 is completely disengaged from the positioning hole 10, the locking pin 31 can no longer block the movement of the second extension part 2, and the second extension part 2 will move to the right.

[0080] Under the elastic force of spring 341, when the second telescopic part 2 moves to the next positioning hole 10, the locking pin 31 will be pushed into the positioning hole 10, preventing the second telescopic part 2 from moving in the opposite direction (i.e., Figure 8 Move to the left (in the middle), if continue to move... Figure 8 If the movement is to the right, the above process is repeated. If the second telescopic part 2 is to be moved to the left, the connecting rod 33 can only be rotated by the hydraulic cylinder 321, thereby causing the locking pin 31 to move axially along the positioning hole 10 until it is disengaged from the positioning hole 10.

[0081] During the above process, since the hydraulic cylinder 321 and the connecting rod 33 are hinged through the hinge hole 330, which is an elongated hole, the hydraulic cylinder 321 will not be subjected to force during the above process. The movement of the locking pin 31 along the axial direction of the positioning hole 10 will only cause the connecting rod 33 to rotate within the range of the elongated hole.

[0082] Figure 10 In the support mechanism shown, the guide surface 311 gradually approaches the plane of the second end of the locking pin 31 from the right to the left in the figure. The first driving force is the driving force that causes the second telescopic part 2 to retract relative to the first telescopic part 1 in the telescopic direction X when it is unlocked. The self-locking direction is... Figure 8 and Figure 9 The embodiments described herein are the opposite. Their self-locking and unlocking mechanisms operate on the same principle as those in the referenced document. Figure 8 and Figure 9 The following is a description of the embodiments.

[0083] In some embodiments, reference Figures 5 to 7 The locking mechanism 3 includes a spring mounting part 37, which is disposed on the locking pin 31. The end of the spring 341 is mounted on the spring mounting part 37, and the spring mounting part 37 corresponding to one locking pin 31 protrudes toward the other locking pin 31.

[0084] By providing a spring mounting part on the locking pin that protrudes towards the other locking pin, the distance the two locking pins move towards each other can be limited, thereby preventing the locking pins from retracting too much relative to the positioning hole and affecting the smooth operation of the support mechanism.

[0085] In some embodiments, reference Figures 1 to 3 , Figures 8 to 10 The first telescopic part 1 and the second telescopic part 2 are box-shaped structures. The first telescopic part 1 is fitted onto the outside of the second telescopic part 2. The dimensions of the first telescopic part 1 and the second telescopic part 2 along the first direction Y are greater than the dimensions along the second direction Z. The first direction Y and the second direction Z are both perpendicular to the telescopic direction X. The first direction Y is perpendicular to the second direction Z.

[0086] The first and second support sections are box-shaped structures, giving the support mechanism sufficient strength and improving its load-bearing capacity. Furthermore, the dimensions of the first and second support sections along the first direction are larger than their dimensions along the second direction, balancing the need for increased strength with space saving. For example, in mountain work machinery where the upper platform can rotate along a horizontal axis relative to the chassis, the first direction of the support mechanism can be set along the width direction of the chassis, and the two ends of the support mechanism along the extension / retraction direction can be hinged to the upper platform and the chassis respectively.

[0087] Optionally, if the support mechanism of the above embodiments is used in engineering machinery, the locking mechanism can be installed inside the box structure of the second support part to better adapt to the harsh working environment, reduce the impact of soil, sand, gravel and mud, and improve the reliability of the locking mechanism.

[0088] In some embodiments, reference Figure 1 , Figure 2 and Figure 10The support mechanism includes a roller 4, at least one roller 4 is disposed between the first telescopic part 1 and the second telescopic part 2 and keeps in contact with the first telescopic part 1 and the second telescopic part 2, and the roller 4 is configured to roll as the first telescopic part 1 and the second telescopic part 2 move relative to each other.

[0089] The rollers can serve as guides and aids between the first and second telescopic sections, improving the smoothness of the relative sliding of the first and second telescopic sections.

[0090] Some embodiments of this disclosure also provide an engineering machine, including the aforementioned support mechanism. This engineering machine may be an excavator, a welding vehicle, an aerial work platform, etc. This engineering machine possesses the advantages of the support mechanism provided in the embodiments of this disclosure.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and not to limit them; although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this disclosure or equivalent substitutions can be made to some technical features, all of which should be covered within the scope of the technical solutions claimed in this disclosure.

Claims

1. A support mechanism, characterized in that, include: First telescopic part (1); The second telescopic part (2) is movably disposed relative to the first telescopic part (1) so that the support mechanism can extend and retract; and A locking mechanism (3) is installed on the second telescopic part (2). The locking mechanism (3) includes a locking pin (31). The first telescopic part (1) is provided with a plurality of positioning holes (10) distributed along the telescopic direction (X) of the support mechanism. The support mechanism has a locked state and an unlocked state. In the locked state, the locking pin (31) can selectively cooperate with one of the plurality of positioning holes (10) so that the first telescopic part (1) and the second telescopic part (2) can remain fixed. In the unlocked state, the locking pin (31) disengages from the positioning hole (10) so that the first telescopic part (1) and the second telescopic part (2) can move relative to each other. The locking pin (31) is provided with a guide structure (310). In the locked state, the guide structure (310) can guide the locking pin (31) out of the positioning hole (10) under the action of the first driving force, so that the support mechanism switches to the unlocked state. The support mechanism maintains the locked state under the action of the second driving force. Of the first driving force and the second driving force, one is a driving force that causes the second telescopic part (2) to extend relative to the first telescopic part (1) along the telescopic direction (X) in the unlocked state, and the other is a driving force that causes the second telescopic part (2) to retract relative to the first telescopic part (1) along the telescopic direction (X) in the unlocked state. The locking mechanism (3) includes a locking pin drive device (32) and / or a force application component (34). The locking pin drive device (32) is drivenly connected to the locking pin (31) and configured to drive the locking pin (31) out of the positioning hole (10) to switch the support mechanism from the locked state to the unlocked state. The force application component (34) is configured to apply a force to the locking pin (31) to keep the locking pin (31) in a cooperating state with the positioning hole (10). The locking mechanism (3) includes two locking pins (31). The first telescopic part (1) is provided with two sets of positioning holes (10) corresponding to the two locking pins (31). Each set of positioning holes (10) includes multiple positioning holes (10) distributed along the telescopic direction (X). The locking pin driving device (32) includes a cylinder (321) and two connecting rods (33) corresponding to the two locking pins (31). The first end of the connecting rod (33) is rotatably connected to the corresponding locking pin (31), and the second end of the connecting rod (33) is rotatably connected to one end of the cylinder (321). And / or, the force-applying component (34) includes a spring (341) disposed between the two locking pins (31). The two locking pins (31) are kept in a cooperating state with the positioning holes (10) by the elastic force of the spring (341).

2. The support mechanism according to claim 1, characterized in that, The guide structure (310) includes a guide surface (311), which is disposed at the first end of the locking pin (31). Under the action of the first driving force, the second telescopic part (2) can move relative to the first telescopic part (1), and during the movement, the guide surface (311) abuts against the edge of the positioning hole (10) near the end of the second telescopic part (2).

3. The support mechanism according to claim 2, characterized in that, Along the telescopic direction (X), the guide surface (311) gradually approaches the second end of the locking pin (31) from one side of the telescopic direction (X) to the other side. In the locked state, the edge of the guide surface (311) on the side close to the second end of the locking pin (31) is outside the positioning hole (10).

4. The support mechanism according to claim 3, characterized in that, The guide surface (311) includes a plane that is inclined from one side of the telescoping direction (X) to the other side.

5. The support mechanism according to any one of claims 1 to 4, characterized in that, The axis of rotation of the connecting rod (33) relative to one end of the oil cylinder (321) is movably set along the length direction of the connecting rod (33).

6. The support mechanism according to claim 5, characterized in that, The locking mechanism (3) includes a first hinge shaft (35), which is disposed at one end of the oil cylinder (321). The second end of the connecting rod (33) is provided with a hinge point hole (330). The hinge point hole (330) is an elongated hole and the length direction of the hinge point hole (330) extends along the length direction of the connecting rod (33). The first hinge shaft (35) is fitted into the hinge point hole (330) and is movably disposed relative to the hinge point hole (330) along the length direction of the connecting rod (33).

7. The support mechanism according to any one of claims 1 to 4, characterized in that, The locking mechanism (3) includes a spring mounting part (37) which is disposed on the locking pin (31). The end of the spring (341) is mounted on the spring mounting part (37), and the spring mounting part (37) corresponding to one of the locking pins (31) protrudes toward the other locking pin (31).

8. The support mechanism according to any one of claims 1 to 4, characterized in that, The first telescopic part (1) and the second telescopic part (2) are box-shaped structures. The first telescopic part (1) is fitted outside the second telescopic part (2). The dimensions of the first telescopic part (1) and the second telescopic part (2) along the first direction (Y) are greater than the dimensions along the second direction (Z). The first direction (Y) and the second direction (Z) are both perpendicular to the telescopic direction (X). The first direction (Y) is perpendicular to the second direction (Z).

9. The support mechanism according to any one of claims 1 to 4, characterized in that, Includes a roller (4), at least one of the rollers (4) being disposed between the first telescopic portion (1) and the second telescopic portion (2) and in contact with the first telescopic portion (1) and the second telescopic portion (2), the roller (4) being configured to roll as the first telescopic portion (1) and the second telescopic portion (2) move relative to each other.

10. An engineering machinery, characterized in that, Includes the support mechanism as described in any one of claims 1 to 9.

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