A tool for hanging lifeline during welding of diesel engine bed frame side body

Abstract

The application discloses a tool for hanging lifeline during side welding of a diesel engine base frame, comprising a clamp and a support rod. The clamp is composed of a C-shaped groove, a bolt and a flat steel, the bolt is connected with the flat steel, the flat steel only moves axially when rotating, and the thickness of the clamped object can be adjusted. The lower end of the support rod is hinged to the outer wall of the C-shaped groove through a rotating shaft, can rotate around the rotating shaft between the vertical and horizontal states, and is locked by a limiting plate and a bolt. The tool is used in pairs, and a steel wire rope is pulled between two small lifting rings to form a lifeline. The tool can vertically clamp the lifting ring and horizontally clamp the edge of the steel plate, has the advantages of adjustable clamping thickness, switchable installation state, light structure, safety and reliability, and effectively solves the problems of high-falling risk and adaptation of different models.

Description

Technical Field

[0001] This invention relates to the field of diesel engine manufacturing technology, and more specifically to a tooling for hanging a safety lifeline during side welding operations on the diesel engine mount frame. Background Technology

[0002] In the manufacturing process of large diesel engine bases and frames, the welds on the side plates and related parts typically require flat welding. To ensure welding quality and ease of operation, the base or frame is often tilted to the side on the production floor to make the side plates horizontal. However, due to the large size of diesel engine bases and frames (ranging from several meters to tens of meters in length and several meters in height), when tilted, the side plates form a working platform 1.5 to 3 meters above the ground. Employees must climb above the side plates to perform welding work for extended periods, posing a significant risk of falls from height.

[0003] Currently, the main technical challenges and shortcomings in safety protection for this working condition are as follows: I. Lack of dedicated safety anchor structure The side panels of the machine base frame are typically made of steel plates, and apart from a few locations with lifting rings, there are no dedicated hooks or anchor points for attaching safety belts. In actual operation, workers often have to temporarily attach their safety belts to non-dedicated structures such as lifting rings, bolt holes, or pipes on the side panels. These temporary attachment points not only have unclear load-bearing capacity, but their locations are often mismatched with the work area, leading to risks of the safety belt swinging, slipping, or even the attachment point breaking during use, thus failing to truly guarantee the safety of the workers.

[0004] Second, the structural differences between different models are significant, making it difficult to achieve universality. Different diesel engine models exhibit significant differences in the dimensions of their engine mounts, side plate thicknesses, and the position and thickness of lifting rings (typically ranging from 20mm to 80mm). Existing general-purpose clamps or hook devices often only accommodate a single thickness or a single clamping position, making it difficult to simultaneously meet the installation requirements of all engine models. Designing and manufacturing dedicated tooling for each engine model would significantly increase tooling management costs and warehousing pressure, and frequent tooling changes would also impact production efficiency. Therefore, designing a tooling that can adapt to different thicknesses and positions while ensuring clamping reliability has become a long-standing but unresolved technical challenge in this field.

[0005] Third, the installation location is limited, and it cannot be adapted to various clamping scenarios. On the side plate of the machine base frame, some positions are equipped with lifting rings, while others lack lifting rings and only have the edge of the steel plate for clamping. Existing safety attachment devices typically only secure lifting rings (e.g., via hooks or ring clamps), and cannot reliably install on the edge of the steel plate where there are no lifting rings; conversely, some steel plate edge clamps are not compatible with the lifting ring structure. This results in operators needing to assess the installation conditions on-site or carry multiple different types of tools, which is extremely inconvenient. Therefore, designing a "dual-purpose tooling" structure that can clamp both lifting rings and steel plate edges is another technical challenge that urgently needs to be addressed by those skilled in the art.

[0006] IV. Tooling needs to balance portability and reliability. Because the work site is located at a height, the tooling needs to be carried to the top of the side panel by operators using a lift or climbing equipment for installation. Therefore, the weight and volume of the tooling itself are strictly limited. Excessively heavy tooling is inconvenient to handle and install, and may even increase operational risks; excessively light tooling, if structurally weak, cannot withstand the impact of a fall from a worker (according to national standards, safety anchor points must be able to withstand a static load of no less than 15kN). How to achieve a lightweight design for the tooling while ensuring sufficient strength and reliability, and ensuring a simple and quick installation process, is also a practical technical challenge in this field.

[0007] V. Existing temporary measures pose safety hazards. In actual production, some workers, for convenience, use simple ropes to tie to the side panel structure or temporarily weld hooks to the edge of the side panel to create a lifeline. These methods not only damage the base material (welding hooks leaves weld scars on the steel plate, affecting subsequent processing), but also make the ropes prone to loosening and the welding quality uncontrollable, posing significant safety hazards. More seriously, these temporary measures lack unified standards and inspection methods, making it difficult for workers to determine whether they truly provide safety protection.

[0008] In summary, current technology lacks a lifeline mounting fixture that can simultaneously meet the following requirements for side welding operations on diesel engine mounts: ① adjustable clamping thickness to adapt to different engine models; ② capable of clamping both lifting rings and steel plate edges to adapt to different installation positions; ③ lightweight structure and quick installation; ④ reliable strength and reusability. These technical challenges have meant that the risk of falls from heights in this working condition has remained unresolved for a long time, urgently requiring an innovative fixture design to fill this technological gap. Summary of the Invention

[0009] To address the above problems, the purpose of this invention is to provide a tooling for hanging a lifeline during side welding of a diesel engine base frame, thereby preventing employees from falling from heights while welding the side of the base frame, ensuring the safety of employees. Furthermore, this tooling is lightweight, easy to transport, convenient to install and disassemble, and can be recycled.

[0010] This invention is achieved through the following technical solution: A tooling for attaching a lifeline during side welding of a diesel engine base frame is characterized in that the tooling includes two parts: a clamp and a support rod, and the tooling is used in pairs, with the two toolings connected by a steel wire rope to form a lifeline for attaching a safety belt buckle.

[0011] The clamp includes a C-shaped groove, a bolt, and a flat steel bar. The C-shaped groove has an opening for clamping a lifting ring or the edge of a steel plate on the side plate of the machine base frame. A threaded hole is formed on one side wall of the C-shaped groove, through which the bolt passes and engages with the threaded side wall. The front end of the bolt is movably connected to the flat steel bar, which is disposed within the opening of the C-shaped groove, and the surface of the flat steel bar facing the other side wall of the C-shaped groove serves as the clamping surface.

[0012] The movable connection between the bolt and the flat steel is as follows: the bolt has an annular groove or enlarged head at its front end, and the flat steel has a corresponding cavity on its back to accommodate the bolt's front end. This allows the bolt to rotate freely relative to the flat steel during rotation, while the bolt and flat steel remain axially fixed. Therefore, when the bolt is rotated, the flat steel moves only linearly along the bolt's axial direction without rotating with the bolt, thereby adjusting the opening size of the C-groove and enabling the clamping of objects of different thicknesses.

[0013] The lower end of the support rod is hinged to the outer wall of the C-shaped groove via a pivot. The axis of the pivot is perpendicular to the opening direction of the C-shaped groove, allowing the support rod to rotate freely between a vertical and a horizontal position. A small lifting ring is fixedly installed at the top of the support rod, which can be fixed to the top of the support rod by welding or threading, and is used to bind the steel wire rope.

[0014] A limiting plate is fixedly installed on the outer wall of the C-shaped groove, near the pivot. The limiting plate has at least two positioning holes, corresponding to the vertical and horizontal positions of the support rod, respectively. A pin hole is correspondingly provided at the lower end of the support rod. By simultaneously inserting a pin into the positioning holes on the limiting plate and the pin hole on the support rod, the support rod can be locked in either a vertical or horizontal position.

[0015] The tooling of this invention has the following two installation states: State 1 (Vertical Clamping): The C-shaped groove is vertically clamped onto the lifting ring on the side plate of the machine base frame. The support rod rotates upward to a vertical position and is locked by a pin. This state is suitable for situations where the side plate has a lifting ring.

[0016] State 2 (Horizontal Clamping): The C-shaped groove is horizontally clamped to the edge of the steel plate on the side plate of the machine base frame, and the support rod is rotated to a horizontal position and locked by a pin. This state is suitable for situations where there are no lifting rings or where it is necessary to clamp the edge of the steel plate.

[0017] The two aforementioned fixtures are symmetrically installed at both ends of the side plate of the machine base frame. After being fixed, a steel wire rope is stretched horizontally between the small lifting rings of the two fixtures to form a continuous and reliable lifeline. The operator can safely carry out high-altitude welding operations by fastening the safety belt hook to the steel wire rope.

[0018] Preferably, the opening size of the C-shaped groove is adjustable from 20mm to 80mm, which can cover the thickness range of lifting rings or steel plates of different models.

[0019] Preferably, the support rod is made of hollow steel pipe, which reduces the overall weight while ensuring strength, making it easy to handle and carry on site.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1) By setting up a dedicated lifeline above the side of the machine base frame, a stable and reliable safety belt attachment point is provided for workers working at heights, effectively preventing falls from heights and ensuring the safety of employees.

[0021] 2) The C-groove opening of the clamp is adjustable, which can clamp lifting rings of different thicknesses (20mm~80mm) or the edge of steel plates; the support rod can be installed vertically or horizontally, and the two states can be switched freely to adapt to the operation needs of different models and different positions (with or without lifting rings), without the need to customize special tooling for each model.

[0022] 3) Bolt locking requires no special tools and can be done by hand; the support rod achieves quick angle switching and locking through the pivot and pin; the installation time for a single tool does not exceed 5 minutes and the disassembly time does not exceed 3 minutes, significantly improving work efficiency.

[0023] 4) The support rod is made of hollow steel pipe, which is lightweight and easy to handle on site.

[0024] 5) The tooling structure is sturdy and durable, and can be reused multiple times, reducing production costs.

[0025] 6) This invention uses a "bolt and flat steel active connection" structure to ensure that the flat steel does not rotate with the bolt when clamped, which increases the contact area, protects the clamped object, and adapts to different thicknesses; the "rotating shaft + limiting plate + pin" structure enables quick switching and reliable locking of the support rod between two working states; the synergistic effect of the above features allows one tooling to cover two installation modes, solving the problem that a single installation method in the background technology cannot adapt to different positions, and has significant inventiveness.

[0026] In summary, this invention provides a tooling for hanging lifelines during side welding of diesel engine base frames that is structurally sound, easy to use, safe, reliable, and highly versatile. It effectively solves the safety protection problems in the prior art and has extremely high practical value and promotional significance. Attached Figure Description

[0027] Figure 1 This is a side view of the frame in this invention; Figure 2 This is a schematic diagram of the tooling for hanging a safety lifeline during side welding operations on a diesel engine base frame according to the present invention. In state 1, the support rod is in a vertical state and the clamp is held on the lifting ring, which is suitable for scenarios where the lifeline is installed through the lifting ring; in state 2, the support rod is in a horizontal state and the clamp is horizontally held on the side plate steel plate, which is suitable for scenarios where there is no lifting ring or where it is necessary to hold the edge of the steel plate. Figure 3 This is a schematic diagram of the tooling installation for hanging a safety lifeline during side welding operations on the diesel engine base frame, according to the present invention.

[0028] In the picture: (1) C-groove (2) Bolts (3) Flat steel (4) Shaft (5) Support rod (6) Small rings (7) Limiting plate Detailed Implementation The invention will be further described below with reference to the accompanying drawings and specific model examples: like Figure 1 As shown, taking a certain type of diesel engine frame as an example, the frame is flipped to the side so that its upper side plate is in a horizontal position, which facilitates flat welding operations. After flipping, the frame is supported and stabilized under with square stools or wooden blocks to ensure that the frame does not move or tip over during the operation.

[0029] like Figure 2 As shown, the tooling provided in this embodiment for hanging the lifeline during side welding of a diesel engine base frame includes two main parts: a clamp and a support rod. Wherein: The clamp consists of a C-slot 1, a bolt 2, and a flat steel bar 3. The bolt 2 passes through one side wall of the C-slot 1, and its front end is movably connected to the flat steel bar 3, which is located within the opening of the C-slot 1. A dynamic fixing structure is used between the bolt 2 and the flat steel bar 3 (e.g., the bolt front end is embedded in the groove of the flat steel bar and can rotate freely), so that when the bolt 2 is rotated, the flat steel bar 3 only moves linearly along the bolt axis without rotating, thereby increasing the contact area with the clamped object and improving clamping stability.

[0030] The lower end of the support rod 5 is hinged to the main body of the C-shaped groove 1 via a pivot 4, which allows the support rod 5 to rotate freely between a vertical and a horizontal position. The support rod 5 is made of hollow steel tubing, making it lightweight and high-strength. A small lifting ring 6 is fixedly welded to the top of the support rod 5 for binding the steel wire rope. A limiting plate 7, which is fixed relative to the C-shaped groove 1, is provided near the pivot 4. The limiting plate 7 has at least two positioning holes, corresponding to the vertical and horizontal positions of the support rod 5, respectively; a pin hole is provided at the corresponding position at the lower end of the support rod 5. By inserting a pin into the positioning hole of the limiting plate 7 and the pin hole of the support rod 5, the support rod 5 can be locked at the desired angle.

[0031] Installation steps (State 1: Vertical clamping of lifting ring) like Figure 2 "State 1" and Figure 3 As shown in this embodiment, a lifting ring is provided on the side plate of the frame, and the thickness of the lifting ring is 50mm.

[0032] Step 1: The operator rides a lift truck or aerial work platform, carrying two tools, to the working position above the side plate of the machine frame.

[0033] Step 2: Take the first fixture and fit the opening of the C-slot 1 onto the lifting ring, positioning the lifting ring within the opening of the C-slot 1 and between the flat steel 3 and the inner wall of the C-slot 1. Then, turn bolt 2 clockwise. Bolt 2 will push the flat steel 3 forward until the flat steel 3 and the inner wall of the C-slot 1 together clamp the lifting ring. Continue to tighten bolt 2 appropriately to ensure the fixture is firmly fixed to the lifting ring without any loosening.

[0034] Step 3: Rotate the support rod 5 upwards around the pivot 4 until it reaches a vertical position. At this point, the positioning hole on the limiting plate 7 corresponding to the vertical position aligns with the pin hole on the support rod 5. Insert the pin into the positioning hole and the pin hole to lock the support rod 5 in the vertical position.

[0035] Step 4: Following the same steps, install the second tool on the lifting ring on the other side. The two tools are arranged symmetrically, and the distance between them is determined according to the actual working width.

[0036] Step 5: Prepare a steel wire rope with a diameter of not less than 8mm. Tie both ends of the steel wire rope to the small lifting eyelets 6 of the two tools respectively, and tighten them to form a horizontal lifeline. The steel wire rope can be tied with rope clips or knots to ensure that the knots are firm and reliable.

[0037] Step 6: Check the installation's security: Confirm that the clamps are tight, the support rods are locked, and the wire rope is taut and not slipping. The worker then attaches the safety harness hook to the wire rope and can begin welding operations at height.

[0038] Installation steps (State 2: Horizontal clamping of steel plate) like Figure 2As shown in "State 2", when there are no lifting rings on the side plate of the frame, or when the tooling needs to be installed on the steel plate on the edge of the side plate, a horizontal clamping method is used.

[0039] The first and second steps are similar to state 1, but this time the horizontal opening of the C-shaped groove 1 faces the edge of the side plate steel plate. After inserting the steel plate, tighten the bolt 2 to fix the clamp horizontally on the side plate steel plate.

[0040] Step 3: Rotate the support rod 5 around the pivot 4 to a horizontal position (or adjust it to a suitable angle according to the available space), and lock it using the limiting plate 7 and the pin. The support rod 5 extends horizontally, with the small lifting ring 6 at the top facing the work area.

[0041] Step 4: Install the second tooling in the same way, so that the small lifting rings 6 of the two toolings are on the same horizontal line, and pull the steel wire rope to form a lifeline.

[0042] After the work is completed, first remove the wire rope, pull out the pin, and rotate the support rod 5 to a position where it fits against the clamp for storage. Then, reverse the screw 2 to loosen the flat steel 3 and remove the fixture. The fixture can be cleaned and stored for future use.

[0043] After trial use in actual diesel engine frame side welding operations, this fixture ensured that workers' safety belts always had a reliable lifeline attachment point, effectively preventing the risk of falls from heights. Installation time for a single person does not exceed 5 minutes, and disassembly does not exceed 3 minutes, significantly improving work efficiency. Furthermore, the fixture is applicable to lifting rings or steel plates with thicknesses ranging from 20mm to 80mm, covering the needs of all engine models in the factory, eliminating the need for customized fixtures for different models.

[0044] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tooling for suspending a lifeline during side welding of a diesel engine base frame, characterized in that, The device includes a clamp and a support rod (5); the clamp includes a C-shaped groove (1), a bolt (2), and a flat steel (3); the C-shaped groove (1) has an opening for clamping the lifting ring or the edge of the steel plate on the side plate of the machine base frame; the bolt (2) passes through a threaded hole on one side wall of the C-shaped groove (1), and its front end is movably connected to the flat steel (3); the flat steel (3) is set in the opening of the C-shaped groove (1), and its surface facing the other side wall of the C-shaped groove (1) is the clamping surface; when the bolt (2) is rotated, the flat steel (3) moves only in a straight line along the bolt axis without rotating with the bolt, so as to adjust the size of the opening and clamp objects of different thicknesses; the lower end of the support rod (5) is hinged to the outer side wall of the C-shaped groove (1) through a rotating shaft (4), and the rotating shaft (4) The axis direction is perpendicular to the opening direction of the C-shaped groove (1), so that the support rod (5) can rotate around the pivot (4) between the vertical and horizontal states; a small lifting ring (6) is fixedly installed at the top of the support rod (5); a limiting plate (7) is fixedly installed on the outer wall of the C-shaped groove (1) near the pivot (4), and the limiting plate (7) has at least two positioning holes, corresponding to the vertical and horizontal positions of the support rod (5) respectively; a pin hole is correspondingly opened at the lower end of the support rod (5); by inserting a pin into the positioning hole on the limiting plate (7) and the pin hole on the support rod (5) at the same time, the support rod (5) is locked in the vertical or horizontal state; the tooling is used in pairs, and the small lifting rings (6) of the two toolings are connected by a steel wire rope to form a lifeline for the safety belt buckle.

2. The tooling for suspending a lifeline during side welding of a diesel engine base frame according to claim 1, characterized in that, The movable connection between the front end of the bolt (2) and the flat steel (3) is as follows: the front end of the bolt is provided with an annular groove or an enlarged head, and the back of the flat steel is provided with a cavity to accommodate the front end of the bolt, so that the bolt can rotate freely but is relatively fixed axially.

3. The tooling for suspending a lifeline during side welding of a diesel engine base frame according to claim 1, characterized in that, The support rod (5) is made of hollow steel pipe.

4. The tooling for suspending a lifeline during side welding of a diesel engine base frame according to claim 1, characterized in that, The tooling has the following two installation states: State 1: The C-shaped groove (1) is vertically clamped on the lifting ring of the machine base frame side plate, and the support rod (5) is rotated upward to the vertical state and locked by the pin; State 2: The C-shaped groove (1) is horizontally clamped to the edge of the steel plate on the side plate of the machine base frame, and the support rod (5) is rotated to a horizontal state and locked by a pin.

5. The tooling for suspending a lifeline during side welding of a diesel engine base frame according to claim 1, characterized in that, The opening size of the C-shaped groove (1) can be adjusted from 20mm to 80mm.

6. The tooling for suspending a lifeline during side welding of a diesel engine base frame according to claim 1, characterized in that, The small lifting ring (6) is welded or threaded to the top of the support rod (5).

7. The tooling for suspending a lifeline during side welding of a diesel engine base frame according to claim 1, characterized in that, The two tooling fixtures are symmetrically installed at both ends of the side plate of the machine base frame, and the steel wire ropes are horizontally tensioned to form a continuous lifeline.

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