Reversible self-limiting and locking safety fence structure
By adopting a flipped safety bar structure on the skid loader of construction machinery vehicles, and using the combination of rotating seat and clamping lock, the existing safety bar structure is solved and the problem of complexity and inability to lock, achieving safety, Reliable limiting and locking effects improve driver safety.
Patent Information
- Application Number
- CN202323548340.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-26
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2033-12-26
AI Technical Summary
The safety bars of existing construction machinery vehicle skid loaders have complex structures, inconvenient installation, poor maintenance, failure of limits and inability to lock, resulting in reduced safety and may cause safety accidents.
Adopt a safety bar structure that can be reversible from limit and lock, including the base, safety bar claw arm, clamp lock and rotary seat. The limit and lock are achieved through the limit slot and clamp lock of the rotary seat, and are installed using screws and nuts. , equipped with non-metallic spacer washer and unlocking rope, simplifying the structure and improving safety.
It realizes a safety bar device with simple structure, few parts, low cost and easy to operate, improves the reliability and safety of the safety bar, solves the problems of limit failure and inability to lock, and provides stronger driver safety protection.
Smart Images
Figure CN222252302U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a safety fence structure capable of turning over, self-limiting and locking, and belongs to the technical field of engineering machinery. Background Art
[0002] At present, the safety bars of engineering machinery vehicle skid loaders are mostly supported by gas springs or springs and limited by gear structures. They have complex structures and are inconvenient to install. Once a failure occurs, it is difficult to obtain general spare parts in the market, and the maintainability is poor. After long-term use, the gear tooth surface of the limiting structure is worn and the safety and reliability are reduced, causing limit failure. Under bumpy conditions, abnormal noises will occur due to the large gear meshing clearance. If the limiting structure is reinforced, additional components will be added, which not only increases the cost, but also increases the difficulty of operation. The limiting effect is still poor. In addition, some safety bars cannot be locked, resulting in reduced safety performance under normal use of the safety bar, and even causing safety accidents in emergency situations. Utility Model Content
[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and to provide a flippable self-limiting and locking safety fence structure with a simple structure, few parts, small size, low cost, and easy operation. The safety fence structure can achieve the limiting and locking effects by combining a simple self-limiting structure with a card plate lock.
[0004] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:
[0005] In a first aspect, the utility model provides a safety fence structure that can be flipped over and locked by itself, comprising:
[0006] A base connected to a cab floor of the vehicle;
[0007] A safety bar crank arm, the safety bar crank arm is rotatably arranged on one side of the top of the base, and a locking column is arranged at the bottom of the safety bar crank arm close to one side of the base;
[0008] A cardboard lock is arranged on the top of the base, the cardboard lock cooperates with the lock column to limit the lock column, and the cardboard lock is provided with an unlocking pull rope for releasing the lock column from limiting the position.
[0009] Furthermore, the card plate lock is elastically connected to a lock tongue at a position opposite to the lock column, a slot for accommodating the lock column is reserved between the card plate lock and the lock tongue, and the unlocking rope is connected to one end of the lock tongue close to the spring.
[0010] Furthermore, the base and the card lock are rotatably connected via a rotating seat, the rotating seat has a limit groove with an angle of 95° along its center plane, the limit groove has an opening extending to the outside of the rotating seat, and the rotating seat is installed on the rotating shaft extending from the top of the base by screw 2 passing through the limit groove opening.
[0011] Furthermore, when the safety bar arm is flipped downward to a horizontal position, the lock column installed on the safety bar arm is locked into the card plate lock, and in this state, screw 2 just supports the lowermost edge of the rotating seat limit slot.
[0012] Furthermore, the card lock is installed in a groove opened on one side of the base by means of a screw and a nut.
[0013] Furthermore, a spacer washer is installed between the rotating seat and the base, and the spacer washer is sleeved on the rotating shaft extending from the top of the base.
[0014] Furthermore, the unlocking pull rope is made of non-metallic soft tensile material, and the unlocking pull rope is sleeved in a groove provided on the card plate lock.
[0015] Furthermore, the rotating seat is made of cast steel.
[0016] Compared with the prior art, the utility model has the following beneficial effects:
[0017] 1. The rotating seat has a limit groove inside, which greatly saves installation space compared with the conventional spring gear meshing limit structure. The safety fence assembly is installed on the shaft extending from the base by screws passing through the limit groove.
[0018] 2. A non-metallic wear-resistant spacer washer is installed between the safety bar assembly and the base, which not only prevents direct contact and friction between the rotating seat and the base, but also improves the matching relationship between the rotating seat and the base, greatly improving the stability of the safety bar flipping.
[0019] 3. The preferred option is to make the rotating seat into a precision steel casting so that it can be made smaller, effectively reducing the cost of the rotating seat.
[0020] 4. Since the rotating seat with its own limiting groove is located at the rear end of the safety fence assembly, and since the rotation angle of the same rod component is the same, the arc area swept by the head and tail ends of the safety fence relative to the center of the rotating seat is proportional to the length of the force arm. In this way, the limiting groove at a certain angle set in advance can play a limiting effect at two extreme positions, eliminating other additional limiting structures or components, greatly saving costs, and facilitating installation and maintenance.
[0021] 5. The card plate lock is installed on the lock mounting plate of the chassis through bolts and locking nuts. When the safety bar flips forward and falls to a horizontal position, the safety bar crank arm can be firmly locked and will not come off by itself (see Article 6 for unlocking methods), which solves the problem that some safety bars cannot be locked and provides a strong guarantee for the driver's safety protection.
[0022] 6. The unlocking rope is made of non-metallic soft tensile material and is inserted into the special groove of the opening mechanism inside the cardboard lock to open the cardboard lock. Due to the special structure of the groove and the elasticity of the rope itself, the rope will not fall off the groove by itself, and it always hangs below the cardboard lock due to gravity, which solves the problem of easy misoperation when the opening pull rod is placed on the top.
[0023] 7. Preferred option: The utility model provides a self-limiting locking technology, which does not exclude the possibility of adding other preferred structures, such as adding a gas spring or a spring assist, etc. on the basis of the present embodiment.
[0024] 8. This safety bar has a simple structure, few parts, small size, low cost, and is easy to operate. It can effectively realize the two-way limit and locking of the safety bar device, improve reliability and safety, effectively protect the driver's personal safety, and has great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 Schematic diagram of explosion decomposition of an implementation case of the utility model.
[0026] Figure 2 A schematic diagram of the upward limit switch of the utility model in the use state.
[0027] Figure 3 A schematic diagram of the utility model in a locked safety bar in use state.
[0028] Figure 4 A schematic structural diagram of the utility model before being locked in the use state.
[0029] In the figure: 1. Base; 2. Safety railing arm; 3. Rotating seat; 4. Locking column; 5. Card plate lock; 6. Nut; 7. Screw one; 8. Spacer washer; 9. Screw two; 10. Unlocking rope. DETAILED DESCRIPTION
[0030] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.
[0031] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.
[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.
[0033] Example 1
[0034] like Figure 1-Figure 4 As shown, this embodiment introduces a flippable self-limiting and locking safety fence structure, including: a base 1, a safety fence corner arm 2, and a card plate lock 5, wherein the base 1 is connected to the floor of the vehicle's cab; the safety fence corner arm 2 is rotatably arranged on one side of the top of the base 1, and a lock column 4 is provided at the bottom of the safety fence corner arm 2 near the side of the base 1; the card plate lock 5 is arranged on the top of the base 1, and the card plate lock 5 cooperates with the lock column 4 to limit the lock column 4, and an unlocking pull rope 10 for releasing the limit of the lock column 4 is provided on the card plate lock 5, and a lock tongue is elastically connected to the card plate lock 5 at the position opposite to the lock column 4, and a slot for accommodating the lock column 4 is reserved between the card plate lock 5 and the lock tongue, and the unlocking pull rope 10 is connected to one end of the lock tongue close to the spring.
[0035] The base 1 and the cardboard lock 5 are rotatably connected via a rotating base 3. The rotating base 3 has a limit groove with an angle of 95° along its central plane. The limit groove has an opening extending to the outside of the rotating base 3. The rotating base 3 is installed on a rotating shaft extending from the top of the base 1 by passing a screw 9 through the limit groove opening. When the safety fence corner arm 2 is flipped downward to a horizontal position, the lock column 4 installed on the safety fence corner arm 2 is clamped into the cardboard lock 5, and in this state, the screw 9 just supports the lowermost edge of the limit groove of the rotating base 3.
[0036] The card plate lock 5 is installed in a groove opened on one side of the base 1 by means of a screw 7 and a nut 6; a spacer washer 8 is installed between the rotating seat 3 and the base 1, and the spacer washer 8 is sleeved on the rotating shaft extending from the top of the base 1; the unlocking pull rope 10 is a non-metallic soft tensile material, and the unlocking pull rope 10 is sleeved in the groove opened on the card plate lock 5, and the rotating seat 3 is made of cast steel.
[0037] The contents designed in the above embodiment are described below in conjunction with a preferred embodiment.
[0038] like Figures 1 to 4 As shown, the flip self-limiting and locking safety fence structure, its main components include a base 1 connected to the cab, a safety fence assembly, a card plate lock 5 and an unlocking rope 10;
[0039] like Figure 1 As shown, the safety fence assembly includes a safety fence crank arm 2, a rotating seat 3 and a locking column 4. The rotating seat 3 has a limiting groove with an angle of 95° along its center plane.
[0040] like Figure 2 As shown, the safety fence assembly is installed on the patented special shaft extending from the base 1 by means of screw No. 2 9 passing through the limit slot. In this state, the safety fence arm 2 is flipped backward to the uppermost position, at which time screw No. 2 9 just presses against the uppermost edge of the limit slot of the rotating seat 3, playing a limiting role so that it can no longer be flipped backward; similarly, when the safety fence arm 2 is flipped forward and laid flat, screw No. 2 9 just presses against the lowermost edge of the limit slot of the rotating seat 3, playing a limiting role so that it can no longer be flipped downward.
[0041] like Figure 3 As shown, when the safety fence arm 2 is flipped downward to a horizontal position, the lock column 3 installed on the safety fence arm 2 is inserted into the card plate lock 5, and the safety fence is locked as shown in the figure. As mentioned above, in this state, the screw 9 just supports the lowermost edge of the limit groove of the rotating seat 3, and is also affected by the downward limit of the limit groove. The dual effects of locking and downward limit make the safety fence safer and more reliable.
[0042] When using Figure 4As shown in the figure, during the implementation of the flip self-limiting and locking safety fence structure, the safety fence turning arm 2 flips downward until the lock column 4 contacts the lock tongue of the card plate lock 5. This critical point is the state when the safety fence locking of the utility model has not yet taken effect; when the safety fence is further pressed down, the lock column 4 enters the card plate lock 5, and the card plate lock 5 plays a locking role, achieving the following Figure 3 The safety bar is shown in a locked state; if the safety bar needs to be unlocked, just pull the unlocking rope 10; after unlocking, the safety bar can be freely flipped, and when it reaches the limit position, it can play the role of limiting and locking.
[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A safety fence structure that can be flipped over and locked, characterized in that: include: A base (1), the base (1) being connected to a cab floor of the vehicle; A safety bar crank arm (2), the safety bar crank arm (2) being rotatably arranged on one side of the top of the base (1), and a locking column (4) being arranged on the bottom of the safety bar crank arm (2) close to one side of the base (1); A cardboard lock (5), wherein the cardboard lock (5) is arranged on the top of the base (1), the cardboard lock (5) cooperates with the lock column (4) to limit the lock column (4), and the cardboard lock (5) is provided with an unlocking pull rope (10) for releasing the lock column (4) from limiting the position.
2. The flippable self-limiting and locking safety fence structure according to claim 1 is characterized in that: The card plate lock (5) is elastically connected to a lock tongue at a position directly opposite to the lock column (4); a slot for accommodating the lock column (4) is reserved between the card plate lock (5) and the lock tongue; and the unlocking pull rope (10) is connected to one end of the lock tongue close to the spring.
3. The flippable self-limiting and locking safety fence structure according to claim 1 is characterized in that: The base (1) and the card plate lock (5) are rotatably connected via a rotating base (3); the rotating base (3) has a limit groove with an angle of 95° along its center plane; the limit groove has an opening extending to the outside of the rotating base (3); the rotating base (3) is installed on a rotating shaft extending from the top of the base (1) by means of a second screw (9) passing through the limit groove opening.
4. The flippable self-limiting and locking safety fence structure according to claim 3 is characterized in that: When the safety bar crank arm (2) is turned downward to a horizontal position, the lock column (4) installed on the safety bar crank arm (2) is locked into the card plate lock (5), and in this state, the second screw (9) just supports the bottom edge of the limit groove of the rotating seat (3).
5. The flippable self-limiting and locking safety fence structure according to claim 1 is characterized in that: The card plate lock (5) is installed in a groove formed on one side of the base (1) by means of a screw (7) and a nut (6).
6. The flippable self-limiting and locking safety fence structure according to claim 3 is characterized in that: A spacer washer (8) is installed between the rotating seat (3) and the base (1), and the spacer washer (8) is sleeved on a rotating shaft extending from the top of the base (1).
7. The flippable self-limiting and locking safety fence structure according to claim 1 is characterized in that: The unlocking pull rope (10) is made of non-metallic soft tensile material, and the unlocking pull rope (10) is sleeved in a groove provided on the card plate lock (5).
8. The flippable self-limiting and locking safety fence structure according to claim 3 is characterized in that: The rotating seat (3) is made of cast steel.