A rear guard for a loader

Abstract

The utility model discloses a kind of loader rear protective fence, including locking mechanism mainly by locking support, lock post, lock plate, lock pin and lock hole;Lock hole is arranged on protective fence assembly, locking support is fixedly installed with first fixed assembly, lock post is fixedly connected with locking support, lock plate is movably connected with lock post, lock pin is arranged on lock post and lock plate;When locking mechanism locks protective fence assembly, lock plate and lock post pass through lock hole in turn and keep that lock post is arranged in lock hole, rotate lock plate, and the length direction of lock plate is perpendicular to the axial direction of lock hole;When locking mechanism locks loose protective fence assembly, lock plate rotates around lock pin, and the length direction of lock plate is parallel to the axial direction of lock hole, lock hole is sequentially separated from lock post and lock plate. The present utility model is simple and convenient for locking operation and lock loose operation, and solves the problem of complicated locking operation and loose locking in the prior art.

Description

Technical Field

[0001] This utility model belongs to the field of loader technology, specifically relating to a loader rear guardrail. Background Technology

[0002] Currently, the rear gate-type guardrails of commercially available loaders mainly consist of a left post, a right post, and a guardrail assembly located between the left and right posts. One end of the guardrail assembly is hinged to the left or right post, and the other end of the guardrail assembly is locked to the right or left post through a locking mechanism, thereby achieving the closing and locking of the guardrail assembly.

[0003] Existing loader rear-end guardrails with openable doors suffer from several problems, including poor closure leading to noise, and cumbersome and inconvenient operation. For example, in patent CN215562951U (a loader rear guardrail), when the guardrail assembly needs to be opened, the elastic retaining spring connected to the right column must first be pulled out of the limiting pin, and then the limiting pin must be pulled out of the fixing seat. This frees the end of the guardrail assembly near the right column from the fixing seat, allowing the assembly to be opened. After opening, the assembly is rotated approximately 90°. Then, the right-side locking pin on the limiting rod is pulled out, and the limiting rod is rotated until its upper through hole is concentric with the upper limit hole on the left column. The pulled-out locking pin is then reinserted, achieving the locked state after the guardrail assembly has been rotated open. In the aforementioned existing patented technical solutions, the operation of closing, opening, and maintaining the open state all require multiple insertions and removals of the elastic retaining spring, limit pin, and locking pin, which is cumbersome. Furthermore, the limit pin is positioned high when removed, making operation inconvenient. Additionally, after the door is closed, during loader operation, the guardrail welding assembly and the right post shake and collide, affecting the service life of the guardrail welding assembly and the integrity of its paint finish. Utility Model Content

[0004] The purpose of this utility model is to disclose a loader rear guardrail, which uses a locking mechanism including a locking support, locking post, locking plate, locking pin and locking hole to lock the guardrail component to the first fixed component. The locking and unlocking operations are simple and convenient, solving the problem of cumbersome locking operation and loose locking in the prior art.

[0005] To achieve the above objectives, this utility model discloses a loader rear guardrail, including a first fixing component, a second fixing component, and a guardrail component, wherein the guardrail component is disposed between the first fixing component and the second fixing component; The guardrail assembly includes a first end and a second end; the first end is connected to the first fixing component, and a locking mechanism is connected between the first fixing component and the first end, the locking mechanism locking the guardrail assembly onto the first fixing component; The locking mechanism includes a locking support, a locking pin, a locking plate, a locking pin, and a locking hole; The keyhole is provided on the guardrail assembly, and the axial direction of the keyhole is consistent with the axial direction of the lock post; The locking support is fixedly installed with the first fixing component, the locking pin is fixedly connected with the locking support, the locking plate is movably connected with the locking pin, and the locking pin passes through the locking pin and the locking plate; The width of the lock plate is smaller than the inner diameter of the lock hole, and the length of the lock plate is greater than the inner diameter of the lock hole; When the locking mechanism locks the guardrail assembly, the lock plate and the lock pin pass through the lock hole in sequence, and the length direction of the lock plate is perpendicular to the axial direction of the lock hole; When the locking mechanism loosens the guardrail assembly, the locking plate rotates around the locking pin until the length direction of the locking plate is parallel to the axial direction of the lock hole, and the lock hole is disengaged sequentially by the locking pin and the locking plate.

[0006] As an optional implementation, the keyhole is an oblong hole, the width direction of the oblong hole is vertical, the width of the oblong hole is greater than the width of the lock plate, and the width of the oblong hole is less than the length of the lock plate.

[0007] As an optional implementation, the locking pin is provided with an opening slot, the depth direction of the opening slot is consistent with the axial direction of the locking pin, the slot opening penetrates the end face of the locking pin away from the first fixing component, and a set of side faces of the opening slot penetrate the outer surface of the locking pin. The locking plate is provided with a locking groove, the locking plate is placed in the opening slot, and the locking pin passes through the opening slot and the locking groove.

[0008] As an optional implementation, the length direction of the lock groove is consistent with the length direction of the lock plate; the lock plate includes end one and end two, and the lock groove has end A and end B; The distance between end A and end one is less than the distance between the locking pin and the bottom of the slot of the opening; The distance between end B and end two is greater than the distance between the locking pin and the bottom of the slot of the opening; The distance between the inner side of the lock groove and the outer side of the lock plate that is closer to it is adapted to the distance between the lock pin and the bottom of the slot of the opening.

[0009] As an optional implementation, the lock groove is configured as an inclined groove, the inclined groove having an inner side surface one and an inner side surface two; the lock plate has an outer side surface one and an outer side surface two; The distance between the first inner side surface and the first outer side surface gradually increases from the end A to the end B, and the distance between the second inner side surface and the second outer side surface gradually decreases from the end A to the end B; The depth of the lock hole is greater than the distance between the bottom of the lock pin and the bottom of the opening slot. After the lock plate is inserted into the opening slot, the outer side and the inner side are positioned close to the bottom of the opening slot.

[0010] As an optional implementation, the second inner surface is configured as a wavy surface.

[0011] As an optional implementation, the first end is connected to the first outer side with a rounded chamfer, the first end is connected to the second outer side with a right angle, and the distance between the apex of the right angle and the first end A is greater than the distance between the locking pin and the bottom of the opening slot.

[0012] As an optional implementation, the locking support is provided with a buffer pad, and the guardrail assembly is pressed onto the buffer pad.

[0013] As an optional implementation, the second end is connected to the second fixing component, and a hinge mechanism is connected between the second end and the second fixing component, the hinge mechanism hinges the guardrail component to the second fixing component; The hinge mechanism includes a first hinge support, a second hinge support, a hinge shaft, and a bushing. The first hinge support is fixedly installed with the second fixing component, and the second hinge support is fixedly installed with the guardrail component. The first hinge support is provided with a first hinge hole, and the second hinge support is provided with a second hinge hole. The first hinge hole and the second hinge hole are coaxially arranged, and the hinge shaft passes through the first hinge hole and the second hinge. The bushing is sleeved on the hinge shaft.

[0014] As an optional implementation, a limiting mechanism is further provided between the second end and the second fixing component. After the guardrail component is released, the limiting mechanism restricts the guardrail component from remaining in the open state. The limiting mechanism includes a first ear plate, a second ear plate, a limiting pin, and a pin. The first ear plate is fixedly connected to the second fixing component, and the second ear plate is fixedly connected to the guardrail component. The first ear plate is provided with a first limiting hole, and the second ear plate is provided with a second limiting hole. When the guardrail assembly is opened, the second ear plate rotates with the guardrail assembly until the first limiting hole and the second limiting hole are coaxial. The limiting pin passes through the first limiting hole and the second limiting hole, which are coaxial. The pin is inserted into the limiting pin to keep the limiting pin passing through the first limiting hole and the second limiting hole.

[0015] As an optional implementation, the first fixing component includes a left metal post, which is fixedly installed with the loader counterweight; the second fixing component includes a right metal post, which is fixedly installed with the loader counterweight; and the guardrail component includes a guardrail welding assembly.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model discloses a loader rear guardrail, in which the locking mechanism includes a locking support, a locking pin, a locking plate, a locking pin, and a locking hole. When loosening, the locking plate is rotated until its length direction aligns with the axis of the locking hole, facilitating the disengagement of the locking hole from the locking plate and locking pin, thus enabling the guardrail assembly to open. When locking, the locking plate is rotated until its length direction is perpendicular to the axis of the locking hole, preventing the locking hole from disengaging from the locking plate and locking pin, thereby locking the guardrail assembly onto the first fixed component, achieving the locking of the guardrail assembly. Both locking and loosening of the guardrail assembly require only the rotation of the locking plate, making operation convenient and simple. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of an embodiment of the protective railing for the rear of a loader according to the present invention.

[0019] Figure 2 This is an exploded view of a loader rear guardrail according to this utility model.

[0020] Figure 3 This is a schematic diagram of the locking plate in posture one in this utility model.

[0021] Figure 4This is a schematic diagram of the locking plate in posture two in this utility model.

[0022] Figure 5 This is a schematic diagram of the fixed state of the rear guardrail of a loader after it has been opened, according to this utility model.

[0023] Explanation of key figure labels: 1. First fixing component; 11. Left metal column; 2. Second fixing component; 21. Right metal column; 13. Loader counterweight; 3. Guardrail assembly; 31. First end; 32. Second end; 4. Locking mechanism; 41. Locking support; 42. Locking pin; 421. Opening slot; 4211. Groove; 43. Locking plate; 431. End 1; 432. End 2; 433. Lock groove; 4331. End A; 4332. End B; 4333. Inner surface 1; 4334. Inner surface 2; 434. Rounded chamfer; 435. Right angle; 436. Outer surface 1; 437. Outer surface 2; 44. Locking hole; 45. Locking pin; 46. Locking connection part; 5. Hinge mechanism; 51. First hinge support; 52. Second hinge support; 53. Hinge shaft; 54. Bushing; 55. First hinge hole; 56. Second hinge hole; 6. Limiting mechanism; 61. First ear plate; 62. Second ear plate; 63. Limiting pin; 64. Insert pin; 71. Install oblong hole; 72. Positioning post; 73. Positioning hole; 74. Buffer pad. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0026] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0027] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0028] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0029] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0030] Please see Figure 1 and Figure 2 As shown in the figure, this application embodiment provides a loader rear guardrail.

[0031] See Figure 1 A loader rear guardrail includes a first fixing component 1, a second fixing component 2, and a guardrail component 3, wherein the guardrail component 3 is disposed between the first fixing component 1 and the second fixing component 2.

[0032] The guardrail assembly 3 includes a first end 31 and a second end 32. The first end 31 is connected to a first fixing component 1, and a locking mechanism 4 is connected between the first fixing component 1 and the first end 31. The locking mechanism 4 locks the guardrail assembly 3 onto the first fixing component 1.

[0033] See Figure 2 The locking mechanism 4 includes a locking support 41, a locking pin 42, a locking plate 43, a locking pin 45, and a locking hole 44.

[0034] A lock hole 44 is provided on the guardrail assembly 3, and the axial direction of the lock hole 44 is consistent with the axial direction of the lock pin 42. The consistency between the axial direction of the lock hole 44 and the axial direction of the lock pin 42 includes parallel or substantially parallel axial direction of the lock hole 44 and the lock pin 42, which facilitates the movement of the lock pin 42 relative to the lock hole 44 when the guardrail assembly 3 is locked or loosened.

[0035] The locking bracket 41 is fixedly installed with the first fixing component 1. The locking pin 42 is fixedly connected to the locking bracket 41. The locking plate 43 is movably connected to the locking pin 42, and the locking pin 45 passes through the locking pin 42 and the locking plate 43. The movable connection between the locking plate 43 and the locking pin 42 facilitates operation of the locking plate 43 when the guardrail component 3 is locked or loosened.

[0036] See Figure 2 and Figure 3 The width of the locking plate 43 is smaller than the inner diameter of the lock hole 44, which facilitates the movement of the locking plate 43 relative to the lock hole 44 when the guardrail assembly 3 is loosened. The length of the locking plate 43 is greater than the inner diameter of the lock hole 44, which facilitates the connection between the locking pin 42 and the lock hole 44 when the guardrail assembly 3 is locked, preventing the lock hole 44 from detaching from the locking pin 42, and ensuring that the guardrail assembly 3 is locked onto the first fixing component 1.

[0037] When the locking mechanism 4 locks the guardrail assembly 3, firstly, Figure 3 In the indicated state, the locking plate 43 and the locking pin 42 pass through the lock hole 44 in sequence, with the locking pin 42 remaining inside the lock hole 44. Then, the locking plate 43 is rotated until its length is perpendicular to the axis of the lock hole 44. Figure 4 The state shown.

[0038] When the locking mechanism 4 performs the locking / loosening operation on the guardrail assembly 3, the locking plate 43 rotates around the locking pin 45 until the length direction of the locking plate 43 is parallel to the axis of the lock hole 44. (See reference) Figure 3 As shown, the keyhole 44 is disengaged from the lock pin 42 and the lock plate 43 in sequence.

[0039] In the above embodiment, when the guardrail assembly 3 is released, the locking plate 43 is rotated first. When the length direction of the locking plate 43 is parallel to the axial direction of the lock hole 44, the guardrail assembly 3 disengages from the locking pin 42 and the locking plate 43, thus separating the guardrail assembly 3 from the first fixing component 1. In this process of releasing the guardrail assembly 3, the locking mechanism 4 can release the guardrail assembly 3 and separate it from the first fixing component 1 simply by rotating the locking plate 43, making the operation simple, convenient, and quick.

[0040] In the above embodiment, when locking the guardrail assembly 3, the guardrail assembly 3 is first rotated with the length direction of the lock plate 43 parallel to the axial direction of the lock hole 44, so that the lock plate 43 and the lock pin 42 sequentially pass into the lock hole 44. (Refer to...) Figure 3 The state shown. Then rotate the locking plate 43 so that the length direction of the locking plate 43 is perpendicular to the axis of the lock hole 44, see reference. Figure 4 The state shown is as follows. In this way, the locking plate 43 limits the lock hole 44, preventing it from disengaging from the locking pin 42 and the locking plate 43, thus locking the guardrail assembly 3 onto the first fixing assembly 1. During the locking process, only the locking plate 43 needs to be rotated, making the operation simple, convenient, and quick.

[0041] In some embodiments, see Figure 2 The locking support 41 is provided with an elongated mounting hole 71, through which the locking support 41 is fixedly mounted on the first fixing component 1. The length direction of the elongated mounting hole 71 is vertical. The setting of the elongated mounting hole 71 facilitates the adjustment of the vertical position of the locking support 41 during installation, so that the locking pin 42 on the locking support 41 is adapted to the locking hole 44.

[0042] In some embodiments, see Figure 2 A positioning post 72 is also provided on the locking support 41, and a positioning hole 73 adapted to the positioning post 72 is also provided on the guardrail assembly 3. The length direction of the positioning hole 73 is horizontal, and the width direction of the positioning hole 73 is vertical. When the guardrail assembly 3 is locked with the first fixing component 1, the positioning post 72 passes through the positioning hole 73. On the one hand, it guides and positions the guardrail assembly 3 during assembly, and on the other hand, it supports the guardrail assembly 3 to ensure that the guardrail assembly 3 is quickly assembled, accurately positioned, and remains balanced after assembly.

[0043] In some embodiments, see Figure 2 The keyhole 44 is an elongated oval hole. The elongated oval shape of the keyhole 44 facilitates the entry and exit of the locking pin 42 and the locking plate 43. When the length direction of the locking plate 43 is parallel to the axial direction of the keyhole 44, the length direction of the elongated oval keyhole 44 is horizontal, and the width direction is vertical, further facilitating the entry and exit of the locking pin 42 and the locking plate 43.

[0044] The width of the oblong hole is greater than the width of the locking plate 43, which facilitates the locking plate 43 to enter and exit the lock hole 44 when the lock is in the loose state. The width of the oblong hole is less than the length of the locking plate 43, which ensures that the locking plate 43 cannot enter or exit the lock hole 44 when the lock is in the locked state.

[0045] In some embodiments, see Figure 2 and Figure 3The locking pin 42 is provided with an opening slot 421, the depth direction of which is consistent with the axial direction of the locking pin 42. The slot 4211 of the opening slot 421 penetrates the end face of the locking pin 42 away from the first fixing component 1, and a set of side faces of the opening slot 421 penetrate the outer surface of the locking pin 42.

[0046] The locking plate 43 is provided with a locking groove 433. The locking plate 43 is placed in the opening slot 421, and the locking pin 45 passes through the opening slot 421 and the locking groove 433.

[0047] When locking and unlocking the guardrail assembly 3, the locking plate 43 is adjusted by rotating around the locking pin 45 to adjust the posture of the locking plate 43, so as to facilitate the locking plate 43 entering and exiting the lock hole 44 or to prevent the locking plate 43 from falling out of the lock hole 44.

[0048] In this embodiment, see Figure 3 and Figure 4 The design of the opening slot 421 and the locking groove 433 facilitates the movement of the locking plate 43 to and maintains these two positions. (See reference...) Figure 3 In posture one, the length direction of the lock plate 43 is aligned with the axis of the lock hole 44, and the length direction of the lock plate 43 is horizontal. (See reference...) Figure 4 The second posture is that the length direction of the lock plate 43 is perpendicular to the axis of the lock hole 44, and the length direction of the lock plate 43 is vertical.

[0049] In this embodiment, the combined design of the opening slot 421, the locking groove 433 and the locking pin 45 facilitates the adjustment and rotation of the locking plate 43, and makes it easy to adjust the locking plate 43 to the two postures mentioned above. The adjustment operation of the locking plate 43 is simple, convenient and quick.

[0050] In some embodiments, see Figure 3 and Figure 4 The length direction of the locking groove 433 is consistent with the length direction of the locking plate 43. The locking plate 43 includes end 1 431 and end 2 432, and the locking groove 433 has end A 4331 and end B 4332. The locking groove 433 is provided to facilitate the connection between the locking plate 43 and the locking pin 42, facilitate the rotation of the locking plate 43 around the locking pin 45, and facilitate the adjustment of the posture of the locking plate 43.

[0051] See Figure 3 The distance between end A4331 and end 431 is less than the distance between the locking pin 45 and the bottom of the slot 421, which facilitates the rotation of the locking plate 43 to the first position. Figure 3 This facilitates the loosening of guardrail component 3.

[0052] The distance between end B4332 and end 432 is greater than the distance between the locking pin 45 and the bottom of the slot 421, which facilitates the locking plate 43 maintaining the second posture state, such as Figure 4This ensures that the guardrail assembly 3 remains locked.

[0053] See Figure 4 The distance between the inner side of the locking groove 433 and the outer side of the locking plate 43 that is closer to it is adapted to the distance between the locking pin 45 and the bottom of the slot 421, which facilitates the adjustment and movement of the locking plate 43 and the adjustment of the locking plate 43 between posture one and posture two. At the same time, it ensures that the locking plate 43 is locked, that is, the locking plate 43 is fixed under the action of the locking pin 45 and the slot 421, and prevents the locking plate 43 from shaking or swinging.

[0054] In addition, in some embodiments, the center of gravity of the locking plate 43 is located between end A4331 and end B4332, which further facilitates the locking plate 43 in maintaining the second posture state.

[0055] In some embodiments, see Figure 3 The lock groove 433 is configured as an inclined groove, which has an inner side surface 4333 and an inner side surface 4334. That is, the inner side surface of the lock groove includes the inner side surface 4333 and the inner side surface 4334. The lock plate 43 has an outer side surface 436 and an outer side surface 437. That is, the outer side surface of the lock plate includes the outer side surface 436 and the outer side surface 437.

[0056] After the locking plate 43 is inserted into the opening slot 421, the outer side surface 436 and the inner side surface 4333 are positioned close to the bottom of the opening slot 421. The distance between the inner side surface 4333 and the outer side surface 436 gradually increases from end A 4331 to end B 4332. The distance between the inner side surface 4333 and the outer side surface 436 near end A 4331 is less than the distance between the locking pin 45 and the bottom of the opening slot 421, while the distance between the inner side surface 4333 and the outer side surface 436 near end B 4332 is greater than the distance between the locking pin 45 and the bottom of the opening slot 421. Thus, the locking plate 43 is positioned as follows: Figure 4 In the second posture shown, the locking plate 43 can be locked. When the locking plate 43 is adjusted to the position shown... Figure 4 In the second posture shown, pull down the locking plate 43 so that the position between the inner side 4333 and the outer side 436 of the locking plate is locked by the locking pin 45, that is, the locking plate is locked to prevent the locking plate from shaking or swinging.

[0057] In some embodiments, the lock groove is configured as an inclined groove, the distance between the inner side and the outer side gradually increases from end A to end B, and the depth of the lock hole is greater than the distance between the bottom of the lock pin and the bottom of the slot. After the lock plate is inserted into the slot, the outer side and the inner side are positioned close to the bottom of the slot. That is, the lock groove 433 is configured as an inclined groove, which, in conjunction with the thickness design of the lock hole 44 on the guardrail assembly 3 and the thickness design of the locking connection part 46 on the guardrail assembly 3, means that the thickness of the locking connection part 46 is the depth of the lock hole. The bottom of the lock pin is the position where the lock pin 42 connects to the locking support 41. The thickness of the locking connection part 46 is slightly greater than the distance from the locking support 41 to the bottom of the slot 421 on the lock pin 42. Thus, after the guardrail assembly 3 is closed, the locking connection part 46 on the guardrail assembly 3 is positioned between the lock plate and the locking support 41. By adjusting the lock plate 43 to such a position... Figure 4 As shown in state two, pull down the locking plate 43 to lock the plate. At this time, the locking plate is restricted and locked by the locking connection part 46 on the guardrail assembly 3. This achieves the locking of the guardrail assembly and reduces the problem of shaking or vibration of the guardrail assembly 3 during operation.

[0058] In some embodiments, the distance between the inner surface 4334 and the outer surface 437 gradually decreases from end A4331 to end B4332, ensuring that the width of the inclined groove is consistent. In some embodiments, the locking groove 433 is set as an inclined groove, so that the structure of the locking plate 43 cannot be symmetrical with respect to the locking groove 433. In this way, even if the locking plate 43 vibrates during the operation of the loader, it will not automatically switch between posture one and posture two due to vibration, especially it will not automatically move from posture two to posture one, ensuring that the locking plate 43 maintains posture two, so that the locking plate 43 keeps the guardrail assembly 3 in the closed and locked state.

[0059] In some embodiments, the inner surface 4334 is configured as a wavy surface. The wavy surface structure can locally change the distance between the inner surface 4333 and the outer surface 436. By configuring the inner surface 4334 as a wavy surface, it is convenient to fine-tune the locking position of the locking plate 43, ensuring that the locking plate 43 remains locked for a long time, while also preventing the locking plate 43 from being over-tightened, thus extending the service life of the locking plate 43.

[0060] In this embodiment, the inner surface 4334 is set as a wave surface, which can further reduce the probability that the locking plate 43 will automatically switch its posture between posture one and posture two due to the vibration of the loader, and ensure that the locking plate 43 can maintain posture two for a long time, so that the locking plate 43 keeps the guardrail assembly 3 in the closed and locked state.

[0061] In some embodiments, end 431 and outer surface 436 are connected by a rounded chamfer 434, and end 431 and outer surface 437 are connected by a right angle 435, wherein the distance between the apex of the right angle 435 and end 4331 is greater than the distance between the locking pin 45 and the bottom of the opening slot 421. (See also...) Figure 3 The rounded chamfer 434 facilitates the rotation of the locking plate 43 around the locking pin 45, enabling the locking plate 43 to change between posture one and posture two. The rounded chamfer 434 also prevents interference during the rotation of the locking plate 43. The right angle 435 helps the locking plate 43 maintain posture one. The right angle 435 interferes with the bottom of the slot 421, ensuring the locking plate 43 remains in a stable position. Figure 3 The state shown is that the locking plate 43 is in posture one, which makes it easy for the locking plate 43 to pass through into the lock hole 44 or to detach from the lock hole 44.

[0062] In some embodiments, see Figure 2 A buffer pad 74 is provided on the locking support 41, and the guardrail assembly 3 is pressed onto the buffer pad 74. The buffer pad 74 reduces the transmission of vibration between the guardrail assembly 3 and the first fixing component 1, and reduces the probability of paint wear on both components. Furthermore, the buffer pad 74 increases the height of the locking connection part 46, further enabling the locking plate to lock the guardrail assembly.

[0063] In some embodiments, see Figure 1 and Figure 2 The second end 32 is connected to the second fixed component 2, and a hinge mechanism 5 is connected between the second end 32 and the second fixed component 2. The hinge mechanism 5 hinges the guardrail component 3 to the second fixed component 2.

[0064] The hinge mechanism 5 includes a first hinge support 51, a second hinge support 52, a hinge shaft 53, and a bushing 54. The first hinge support 51 is fixedly installed with the second fixing component 2, and the second hinge support 52 is fixedly installed with the guardrail component 3.

[0065] The first hinge support 51 is provided with a first hinge hole 55, and the second hinge support 52 is provided with a second hinge hole 56. The first hinge hole 55 and the second hinge hole 56 are coaxially arranged, and the hinge shaft 53 passes through the first hinge hole 55 and the second hinge. The bushing 54 is sleeved on the hinge shaft 53.

[0066] When the door is opened, the guardrail assembly 3 rotates around the axis of the hinge shaft 53. The hinge mechanism 5 has two sets arranged in the vertical direction on the second end 32 to ensure reliable and stable hinge connection and avoid problems such as shaking or displacement of the guardrail assembly 3.

[0067] In some embodiments, see Figure 1 and Figure 2A limiting mechanism 6 is also provided between the second end 32 and the second fixed component 2. After the guardrail component 3 is locked, the limiting mechanism 6 restricts the guardrail component 3 to remain in the open state.

[0068] The limiting mechanism 6 includes a first ear plate 61, a second ear plate 62, a limiting pin 63, and a pin 64. The first ear plate 61 is fixedly connected to the second fixing component 2, and the second ear plate 62 is fixedly connected to the guardrail component 3. The first ear plate 61 is provided with a first limiting hole, and the second ear plate 62 is provided with a second limiting hole.

[0069] When the guardrail assembly 3 is opened, the second ear plate 62 rotates with the guardrail assembly 3 until the first limiting hole and the second limiting hole are coaxial, and the limiting pin 63 passes through the first limiting hole and the second limiting hole in a coaxial state. The pin 64 is inserted into the limiting pin 63 to keep the limiting pin 63 passing through the first limiting hole and the second limiting hole.

[0070] When the guardrail assembly 3 rotates around the hinge mechanism 5, the second ear plate 62 rotates with the guardrail assembly 3. After the guardrail assembly 3 is rotated into the open position, the first limit hole and the second limit hole are coaxial. At this time, the limit pin 63 is inserted into the first limit hole and the second limit hole to keep the guardrail assembly 3 in the open position.

[0071] In this embodiment, the limiting mechanism 6 only requires the insertion of the limiting pin 63, making the operation simple and convenient. After the limiting pin 63 is inserted into the first limiting hole and the second limiting hole, a triangle is formed between the second end 32 of the guardrail assembly 3 and the second fixing component 2, ensuring that the guardrail assembly 3 stably maintains the open state.

[0072] In some embodiments, the first fixing component 1 includes a left metal post 11, which is fixedly installed to the loader counterweight 13 by counterweight bolts. The second fixing component 2 includes a right metal post 21, which is fixedly installed to the loader counterweight 13 by counterweight bolts. Both the left metal post 11 and the right metal post 21 are respectively installed on the loader counterweight 13 by counterweight bolts, facilitating the formation of the left metal post 11 and the right metal post 21 while ensuring their positional accuracy. The guardrail component 3 includes a guardrail welding assembly, which is formed by welding several metal rods, resulting in high strength and good stability.

[0073] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A protective railing for the rear of a loader, characterized in that, It includes a first fixing component, a second fixing component, and a guardrail component, wherein the guardrail component is disposed between the first fixing component and the second fixing component; The guardrail assembly includes a first end and a second end; the first end is connected to the first fixing component, and a locking mechanism is connected between the first fixing component and the first end, the locking mechanism locking the guardrail assembly onto the first fixing component; The locking mechanism includes a locking support, a locking pin, a locking plate, a locking pin, and a locking hole; The keyhole is provided on the guardrail assembly, and the axial direction of the keyhole is consistent with the axial direction of the lock post; The locking support is fixedly installed with the first fixing component, the locking pin is fixedly connected with the locking support, the locking plate is movably connected with the locking pin, and the locking pin passes through the locking pin and the locking plate; The width of the lock plate is smaller than the inner diameter of the lock hole, and the length of the lock plate is greater than the inner diameter of the lock hole; When the locking mechanism locks the guardrail assembly, the locking plate and the locking pin pass through the lock hole in sequence and the locking pin is kept inside the lock hole. The locking plate is rotated so that the length direction of the locking plate is perpendicular to the axial direction of the lock hole. When the locking mechanism loosens the guardrail assembly, the locking plate rotates around the locking pin until the length direction of the locking plate is parallel to the axial direction of the lock hole, and the lock hole is disengaged sequentially by the locking pin and the locking plate.

2. The loader rear guardrail according to claim 1, characterized in that, The keyhole is an oblong hole, and the width of the oblong hole is in the vertical direction. The width of the oblong hole is greater than the width of the lock plate, and the width of the oblong hole is less than the length of the lock plate.

3. The loader rear protective railing according to claim 1, characterized in that, The locking pin is provided with an opening slot, the depth direction of the opening slot is consistent with the axial direction of the locking pin, the slot opening penetrates the end face of the locking pin away from the first fixing component, and a set of side faces of the opening slot penetrate the outer surface of the locking pin. The locking plate is provided with a locking groove, the locking plate is placed in the opening slot, and the locking pin passes through the opening slot and the locking groove.

4. The loader rear guardrail according to claim 3, characterized in that, The length direction of the lock groove is consistent with the length direction of the lock plate; the lock plate includes end one and end two, and the lock groove has end A and end B; The distance between end A and end one is less than the distance between the locking pin and the bottom of the slot of the opening; The distance between end B and end two is greater than the distance between the locking pin and the bottom of the slot of the opening; The distance between the inner side of the lock groove and the outer side of the lock plate that is closer to it is adapted to the distance between the lock pin and the bottom of the slot of the opening.

5. The loader rear guardrail according to claim 4, characterized in that, The lock groove is configured as an inclined groove, and the inclined groove has an inner side surface one and an inner side surface two; the lock plate has an outer side surface one and an outer side surface two. The distance between the first inner side surface and the first outer side surface gradually increases from the end A to the end B, and the distance between the second inner side surface and the second outer side surface gradually decreases from the end A to the end B; The depth of the lock hole is greater than the distance between the bottom of the lock pin and the bottom of the opening slot. After the lock plate is inserted into the opening slot, the outer side and the inner side are positioned close to the bottom of the opening slot.

6. The loader rear guardrail according to claim 5, characterized in that, The inner surface 2 is configured as a wavy surface.

7. The loader rear guardrail according to claim 5, characterized in that, The first end is connected to the first outer side with a rounded chamfer, and the first end is connected to the second outer side with a right angle. The distance between the apex of the right angle and the first end A is greater than the distance between the locking pin and the bottom of the opening slot.

8. The loader rear guardrail according to claim 1, characterized in that, The second end is connected to the second fixing component, and a hinge mechanism is connected between the second end and the second fixing component, the hinge mechanism hinges the guardrail component to the second fixing component; The hinge mechanism includes a first hinge support, a second hinge support, a hinge shaft, and a bushing. The first hinge support is fixedly installed with the second fixing component, and the second hinge support is fixedly installed with the guardrail component. The first hinge support is provided with a first hinge hole, and the second hinge support is provided with a second hinge hole. The first hinge hole and the second hinge hole are coaxially arranged, and the hinge shaft passes through the first hinge hole and the second hinge. The bushing is sleeved on the hinge shaft.

9. The loader rear guardrail according to claim 1, characterized in that, A limiting mechanism is also provided between the second end and the second fixing component. After the guardrail component is released, the limiting mechanism restricts the guardrail component from remaining in the open state. The limiting mechanism includes a first ear plate, a second ear plate, a limiting pin, and a pin. The first ear plate is fixedly connected to the second fixing component, and the second ear plate is fixedly connected to the guardrail component. The first ear plate is provided with a first limiting hole, and the second ear plate is provided with a second limiting hole. When the guardrail assembly is opened, the second ear plate rotates with the guardrail assembly until the first limiting hole and the second limiting hole are coaxial. The limiting pin passes through the first limiting hole and the second limiting hole, which are coaxial. The pin is inserted into the limiting pin to keep the limiting pin passing through the first limiting hole and the second limiting hole.

10. The loader rear guardrail according to claim 1, characterized in that, The first fixing component includes a left metal column, which is fixedly installed with the loader counterweight; the second fixing component includes a right metal column, which is fixedly installed with the loader counterweight; and the guardrail component includes a guardrail welding assembly.

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