A movable truck guardrail based on ratchet mechanism

Abstract

The present invention discloses a movable truck guardrail based on a ratchet mechanism, comprising a guardrail bracket, a guardrail, a ratchet, and an axle rod, wherein the top of the guardrail bracket is connected to the bottom of the truck compartment; the axle rod is connected and fixed to the guardrail bracket through a spline and a thread; the guardrail comprises a guardrail post and a guardrail crossbar, the end of the guardrail post is hingedly connected to the axle rod, and a guardrail angle positioning mechanism is arranged on the guardrail post between the guardrail post and the ratchet to realize the angle positioning of the guardrail post. The present invention can quickly realize the angle between the guardrail and the bottom of the compartment through the guardrail angle positioning mechanism, greatly reducing the labor intensity and time loss of truck bottom or fuel tank maintenance, improving efficiency, and having promotion value.

Description

Technical Field

[0001] The invention relates to a truck guardrail, in particular to a movable truck guardrail based on a ratchet mechanism. Background Art

[0002] The guardrail of a truck is generally installed at the rear bottom of the car or on the side of the fuel tank. As a protective facility, it has the function of preventing foreign objects from entering the chassis and protecting the fuel tank. Guardrails are divided into two types: movable and fixed. Most of the existing fixed guardrails are welded to the bottom of the car or the mailbox bracket as a whole. If you want to enter the bottom of the car for maintenance or to maintain the fuel tank, it is extremely inconvenient and needs to be disassembled as a whole; the existing movable guardrails are mainly based on repeated manual removal and installation of fixing pins, and the movement of the guardrail is achieved by changing the position of the fixing pins and the rotation angle of the guardrail column. Although this achieves the movement of the guardrail, the installation and disassembly is time-consuming and inefficient. Summary of the invention

[0003] The purpose of the present invention is to provide a movable truck guardrail based on a ratchet mechanism to solve the technical problems of time-consuming installation and disassembly and low efficiency of the movable guardrail in the prior art.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A movable truck guardrail based on a ratchet mechanism, comprising a guardrail bracket, a guardrail and an axle rod, wherein the guardrail bracket comprises two, the two guardrail brackets are symmetrically fixedly connected to the two sides of the bottom of the truck compartment, and a horizontally arranged axle rod is arranged between the two guardrail brackets;

[0006] The guardrail is connected to the shaft, and the guardrail includes a guardrail post and a crossbar. The guardrail post includes two guardrail posts, which are symmetrically arranged on the shaft, and the crossbar is arranged at one end of the two guardrail posts, and the other ends of the two guardrail posts are hinged on the shaft, and a guardrail angle positioning mechanism for realizing the angle positioning of the guardrail post is arranged between each guardrail post and the shaft, and the guardrail angle positioning mechanism includes:

[0007] A ratchet, a latch, a spring, an eccentric wheel and a handle, wherein one end of the guardrail post connected to the shaft rod has a through slot extending along the axial direction of the guardrail post, the lever arms on both sides of the through slot are symmetrically hinged on the shaft rod, the ratchet is fixedly arranged on the shaft rod between the two lever arms, and one side rim of the ratchet is located in the through slot, a sliding slot arranged along the radial direction of the ratchet is provided on the guardrail post at the rear end of the through slot, the latch is slidably connected in the sliding slot, and the spring is arranged between the bottom of the latch and the bottom of the sliding slot;

[0008] A stepped groove is provided on the side of the latch, and an eccentric wheel is provided in the stepped groove. The eccentric wheel shaft of the eccentric wheel is connected to a handle arranged on the outside of the guardrail column. The handle drives the eccentric wheel to rotate through the eccentric wheel shaft and then drives the latch to move up and down in the sliding groove along the radial direction of the ratchet wheel, so that the latch can contact the surface of the ratchet wheel or separate from the ratchet wheel.

[0009] After the rod wall of the shaft rod is key-connected with the bottom circular hole of the guardrail bracket, the parts of the two ends of the shaft rod extending out of one side of the guardrail bracket are relatively fixed to the guardrail bracket through threaded fasteners; the shaft hole of the ratchet wheel is key-connected with the rod wall of the shaft rod.

[0010] The rod wall of the shaft rod is connected to the bottom circular hole of the guardrail bracket via a spline, and the shaft hole of the ratchet wheel is connected to the rod wall of the shaft rod via a flat key.

[0011] A stopper for preventing the ratchet from sliding axially is arranged on the rod wall of the shaft rod to prevent the ratchet from moving axially on the shaft rod. The stopper is a shaft sleeve arranged between the two ratchets and between the ratchet and the guardrail bracket.

[0012] The handle is connected to the wheel shaft of the eccentric wheel via a key.

[0013] Beneficial effects:

[0014] The present invention provides a movable truck guardrail based on a ratchet mechanism. In a normal state, a latch contacts the ratchet under the action of a spring to limit the position of the guardrail post. When maintenance is needed, it is only necessary to rotate the handle, and the handle drives the eccentric wheel to rotate around the eccentric wheel axis. The rotation of the eccentric wheel causes the latch to overcome the elastic force of the spring and move radially downward along the ratchet to separate from the ratchet surface, and then lift up the guardrail until the angle between the guardrail and the ratchet is appropriate. The handle is released, and the latch drives the latch to move radially upward along the ratchet under the elastic force of the spring to contact the ratchet teeth of the ratchet, thereby positioning the guardrail.

[0015] The movable truck guardrail based on the ratchet mechanism of the present invention can greatly reduce the labor intensity and time loss of truck bottom or fuel tank maintenance, improve efficiency, and has promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0017] Figure 2 It is a schematic diagram of the working state of an embodiment of the present invention;

[0018] Figure 3 is a left side view of an embodiment of the present invention;

[0019] Figure 4 is an enlarged view of a positioning spring latch in an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the position installation of an embodiment of the present invention in a normal state;

[0021] Figure 6 It is a schematic diagram of the position installation of an embodiment of the present invention in a working state.

[0022] Among them, 1 is a latch; 2 is a shaft rod; 3 is a cross bar; 4 is a guardrail bracket; 5 is a guardrail post; 6 is a ratchet; 7 is an eccentric wheel; 8 is a handle; 9 is a spring; 10 is a bushing; and 11 is a nut. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. In the embodiments, for the convenience of description, the description of the relative position relationship of each component is based on the attached Figure 1 The positional relationships of top, bottom, left, right, front, and back are described in accordance with the layout of the specification. Figure 1 It is determined by the layout direction.

[0024] Combination Figure 1 , 2 As can be seen from Figure 3, the movable truck guardrail based on the ratchet mechanism includes a guardrail bracket 4, a guardrail, a ratchet 6, a shaft rod 2, a positioning spring pin, a shaft sleeve 10, and a nut 11.

[0025] The top of the guardrail bracket 4 is connected to the bottom of the truck compartment, and a spline groove is provided in the circular hole at the bottom of the guardrail bracket 4; both ends of the shaft rod 2 are provided with splines, and on the outside of the splines, the end of the shaft rod 2 has an external thread, and the shaft rod is matched with the circular hole of the guardrail bracket 4 through the splines and then fixed to the guardrail bracket 4 through threaded fasteners.

[0026] The inner circular hole of the ratchet wheel 6 is provided with a flat keyway, which is connected to the shaft rod 2 via a flat key.

[0027] The shaft sleeve 10 is sleeved on the outside of the shaft rod 2 and placed between the two ratchets 6 and between the ratchet 6 and the guardrail bracket 4 to fix the correct position of the ratchet 6 on the shaft rod 2.

[0028] The guardrail comprises a guardrail post 5 and a guardrail crossbar 3, and the guardrail post 5 and the guardrail crossbar 3 are connected by welding or bolts.

[0029] The shaft rod 2 acts as a hinge bolt to hinge itself to the guardrail post.

[0030] The guardrail angle positioning mechanism includes a latch 1, an eccentric wheel 7, a handle 8 and a spring 9, wherein the handle 8 and the guardrail column are hingedly connected and transitionally matched by using a section of an axis on the handle 8 as a hinge bolt.

[0031] There are keyways on the extending shaft of the handle 8 and in the circular hole of the eccentric wheel 7, and the handle 8 and the eccentric wheel 7 are connected by a key.

[0032] The eccentric wheel 7 and the latch 1 achieve motion transmission through surface contact.

[0033] The bottom of the latch pin 1 and the upper end of the spring 9 are welded.

[0034] A reinforcing plate is embedded inside the guardrail post 5, and the bottom of the spring 9 is connected to the reinforcing plate by welding.

[0035] The guardrail and the ratchet 6 are able to change and fix their relative positions to each other through the guardrail angle positioning mechanism.

[0036] The working process of the movable truck guardrail based on the ratchet mechanism of the present invention is:

[0037] Under normal conditions, the movable truck guardrail based on the ratchet mechanism is fixed in the initial position, that is, the latch contacts the ratchet 6 under the action of the spring 9, limiting the position of the guardrail post 5;

[0038] When maintenance is needed, it is only necessary to rotate the handle 8 on the positioning spring latch, and the handle drives the eccentric wheel to rotate around the eccentric wheel axis. The rotation of the eccentric wheel causes the latch to overcome the elastic force of the spring and move radially downward along the ratchet wheel to disengage from the ratchet wheel surface, and then lift the guardrail until the angle between the guardrail and the ratchet wheel is appropriate. Then, release the handle, and the latch drives the latch to move radially upward along the ratchet wheel under the elastic force of the spring and contact the ratchet teeth of the ratchet wheel, so that the guardrail can be positioned and the operation can be carried out.

Claims

1. A movable truck guardrail based on a ratchet mechanism, characterized in that: It includes a guardrail bracket, a guardrail and an axle rod, wherein the guardrail bracket includes two, the two guardrail brackets are symmetrically fixedly connected to the two sides of the bottom of the truck compartment, and a horizontally arranged axle rod is provided between the two guardrail brackets; The guardrail is connected to the shaft rod, the guardrail comprises a guardrail post and a crossbar, the guardrail post comprises two, the two guardrail posts are symmetrically arranged on the shaft rod, one end of the two guardrail posts is provided with the crossbar, the other end of the two guardrail posts is hinged on the shaft rod, and a guardrail angle positioning mechanism for realizing the angle positioning of the guardrail post is provided between each guardrail post and the shaft rod, the guardrail angle positioning mechanism comprises: a ratchet, a latch, a spring, an eccentric wheel and a handle, wherein one end of the guardrail post connected to the shaft rod has a through groove extending along the axial direction of the guardrail post, the lever arms on both sides of the through groove are symmetrically hinged on the shaft rod, the ratchet is fixedly arranged on the shaft rod between the two lever arms, and one side wheel rim of the ratchet is located in the through groove, and a sliding groove arranged along the radial direction of the ratchet is provided on the guardrail post at the rear end of the through groove, the latch is slidably connected in the sliding groove, and the spring is arranged between the bottom of the latch and the bottom of the sliding groove; A stepped groove is provided on the side of the latch pin, and an eccentric wheel is provided in the stepped groove. The eccentric wheel shaft of the eccentric wheel is connected to a handle provided outside the guardrail post. The handle drives the eccentric wheel to rotate through the eccentric wheel shaft, and then drives the latch pin to move up and down in the sliding groove along the radial direction of the ratchet wheel, so that the latch pin can contact the surface of the ratchet wheel or separate from the ratchet wheel. After the rod wall of the shaft rod is keyed to the bottom circular hole of the guardrail bracket, the parts of the two ends of the shaft rod extending out of one side of the guardrail bracket are relatively fixed to the guardrail bracket by threaded fasteners; the shaft hole of the ratchet wheel is keyed to the rod wall of the shaft rod; The rod wall of the shaft rod is connected to the bottom circular hole of the guardrail bracket via a spline, and the shaft hole of the ratchet wheel is connected to the rod wall of the shaft rod via a flat key; A stopper is provided on the rod wall of the shaft rod to prevent the ratchet from sliding axially, so as to prevent the ratchet from moving axially on the shaft rod. The stopper is a shaft sleeve provided between the two ratchets and between the ratchet and the guardrail bracket; The handle is connected to the axle of the eccentric wheel via a key; Under normal conditions, the movable truck guardrail based on the ratchet mechanism is fixed in the initial position, that is, the latch contacts the ratchet under the action of the spring, limiting the position of the guardrail post; When maintenance is needed, one only needs to rotate the handle on the positioning spring latch. The handle drives the eccentric wheel to rotate around the eccentric wheel axis. The rotation of the eccentric wheel causes the latch to overcome the elastic force of the spring and move radially downward along the ratchet wheel to disengage from the ratchet wheel surface. Then the guardrail is lifted until the angle between the guardrail and the ratchet wheel is appropriate. Then, the handle is released. The elastic force of the spring drives the latch to move radially upward along the ratchet wheel and contact the ratchet teeth of the ratchet wheel. The guardrail can be positioned for operation.

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