Piston type two-stroke heavy oil engine assembling and fixing tool
By designing a mounting fixture for a piston-type two-stroke heavy oil engine, the problem of unstable crankshaft fixation was solved, achieving fluid fixation of the crankcase and tight installation of the limiting sleeve, thus improving assembly efficiency and quality.
Patent Information
- Application Number
- CN202520132109.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-01-21
AI Technical Summary
In the assembly process of small piston two-stroke heavy oil engines, existing technology is insufficient to effectively fix the crankshaft, resulting in loose installation of the limit sleeve, which may cause the crankshaft to move and rotate, affecting assembly efficiency and quality.
Design a piston-type two-stroke heavy oil engine assembly and fixing fixture, including a fixing bracket, fixing bracket fixing screws, crankshaft fixing screws and crankcase fixing screws. Through the combined use of these components, a stable connection between the crankcase and the fixing bracket is achieved, preventing crankshaft rotation and ensuring that the crankshaft shoulder and bearing inner ring are tightly attached before the limit sleeve is installed.
This achieves fluidity and fixation of the crankcase, avoids repeated fixing of reference parts, ensures the stability of the crankshaft before the installation of the limit sleeve, improves assembly efficiency and quality, and reduces assembly time.
Smart Images
Figure CN223719371U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to small -size two -stroke heavy oil engine assembly technical field, specifically point to a piston type two -stroke heavy oil engine assembly fixed frock. BACKGROUND
[0002] Small -size piston type two -stroke heavy oil engine is the important power type of unmanned aerial vehicle system, and higher requirements are put forward to the fixation of reference parts and the reliability of component assembly in the engine assembly process. The crankcase is the reference part of the whole machine assembly of the small -size piston type two -stroke heavy oil engine, and the engine assembly starts from the crankcase assembly. In the engine assembly process, the fixation of reference parts should be reduced to reduce the time required for assembly and further improve the production efficiency. The crankshaft of the small -size piston type two -stroke heavy oil engine is axially limited by clamping the inner ring of the bearing through the shaft shoulder and the limiting sleeve, so the shaft shoulder of the crankshaft must be tightly attached to the inner ring of the bearing before the limiting sleeve is installed to prevent the crankshaft from axially moving after the limiting sleeve is installed. The cylindrical pin is in interference fit with the crankshaft, and the crankshaft will rotate during the pressing of the cylindrical pin. In order to better press the cylindrical pin, the rotation of the crankshaft must be prevented. SUMMARY
[0003] The piston type two -stroke heavy oil engine assembly fixed frock provided by the application has the advantages of simple structure, convenient operation and low manufacturing cost, reduces the fixation of reference parts in the engine assembly process, ensures that the shaft shoulder of the crankshaft is tightly attached to the inner ring of the bearing before the limiting sleeve is installed, avoids the axial movement of the crankshaft caused by the improper installation of the limiting sleeve, and prevents the rotation of the crankshaft during the pressing of the cylindrical pin.
[0004] The piston type two -stroke heavy oil engine assembly fixed frock mainly includes a fixing frame, fixing frame fixing screws, crankshaft fixing screws and crankcase fixing screws. The fixing frame is fixed on the movable tray of the production line, so that the fixing frame can flow according to the assembly process along with the tray. The crankcase fixing screws fix the crankcase to the fixing frame, so that the crankcase can flow according to the assembly process along with the fixing frame. The crankshaft fixing screws cooperate with the fixing frame to press against the process hole of the crankshaft, so that the shaft shoulder of the crankshaft is tightly attached to the inner ring of the bearing before the limiting sleeve is installed, and the rotation of the crankshaft during the pressing of the cylindrical pin is prevented.
[0005] Preferably, the piston type two -stroke heavy oil engine assembly fixed frock is characterized in that the fixing frame is connected and fixed with the movable tray of the production line through the fixing frame fixing screws, so that the fixing frame can flow according to the assembly process along with the tray.
[0006] Preferably, the crankcase fixing screws are connected and fixed with the fixing frame through the through hole 2 on the fixing frame after the crankshaft is installed into the crankcase, so that the crankcase can flow according to the assembly process along with the fixing frame, and the reference part is not fixed repeatedly in the next process.
[0007] Preferably, the crankshaft fixing screw is screwed into the threaded hole on the fixing frame after the crankcase is fixed to the fixing frame, and abuts against the crankshaft process hole, so that the shaft shoulder of the crankshaft is tightly attached to the bearing inner ring before the limiting sleeve is installed, preventing the crankshaft from axial movement due to improper installation; the crankshaft is fixed, preventing the crankshaft from rotating during the press-fitting of the cylindrical pin.
[0008] Advantages
[0009] The present application has reasonable structure, simple structure and convenient operation, and has the advantages that the crankcase frame can be transferred with the fixing frame according to the assembly process, avoiding repeated fixation of the reference part in the next process; the shaft shoulder of the crankshaft can be tightly attached to the bearing inner ring before the limiting sleeve is installed, preventing the crankshaft from axial movement due to improper installation; the crankshaft can be fixed, preventing the crankshaft from rotating during the press-fitting of the cylindrical pin; the engine assembly time is effectively reduced, the engine production efficiency is improved, and the engine assembly quality is guaranteed. BRIEF DESCRIPTION OF DRAWINGS
[0010] Figure 1 is an installation schematic view of the present application;
[0011] Figure 2 is a structural schematic view of the fixing frame.
[0012] In the figure:
[0013] 1 - fixing frame 2 - fixing frame fixing screw 3 - crankshaft fixing screw
[0014] 4 - crankcase fixing screw 5 - crankcase 6 - cylindrical pin
[0015] 7 - crankshaft 11 - bottom plate 12 - through hole 1
[0016] 13 - fixed plate 14 - through hole 2 15 - threaded hole
[0017] 16 - reinforcing rib DETAILED DESCRIPTION
[0018] The specific embodiment of the present application will be further described in detail below in combination with the drawings.
[0019] The basic idea of the present application is to combine a piston two-stroke heavy oil engine assembly fixing tool to realize the fixation of the reference part in the engine assembly process.
[0020] As shown in Figure 1 , Figure 2 , a piston two-stroke heavy oil engine assembly fixing tool, which is composed of a fixing frame 1, a fixing frame fixing screw 2, a crankshaft fixing screw 3, and a crankcase fixing screw 4; the fixing frame 1 mainly has a bottom plate 11, a through hole 112, a fixed plate 13, a through hole 214, a threaded hole 15, and a reinforcing rib 16.
[0021] Working principle:
[0022] As Figures 1-2 shown, the fixed frame 1 is made of stainless steel material, which is assembled by welding of the bottom plate 11, the fixed plate 13 and the reinforcing rib 16, so as to ensure stable and reliable fixation of the engine during assembly process; the fixed frame 1 is connected and fixed with the movable tray of the production line through the fixed frame fixing screw 2, the crankcase fixing screw 4 is matched with the through hole 214 on the fixed frame 1 after the crankshaft 7 is installed into the crankcase 5, so as to connect and fix the crankcase 5 with the fixed frame 1, realize that the crankcase 5 flows with the fixed frame 1 and the tray according to the assembly process, avoid repeated fixation of the reference part by the next process, and make the engine assembly on the same tray; the crankshaft fixing screw 3 is screwed into the threaded hole 15 on the fixed frame 1 after the crankcase 5 is fixed to the fixed frame 1, and is pressed against the crankshaft process hole, so as to fix the crankshaft 7, prevent the crankshaft 7 from rotating when the cylindrical pin 6 is pressed, ensure that the cylindrical pin 6 is pressed in place, ensure that the shaft shoulder of the crankshaft 7 is tightly attached to the bearing inner ring before the limiting sleeve is installed, and prevent the crankshaft 7 from being installed out of position to cause axial movement of the crankshaft 7.
[0023] The above embodiments only describe the preferred embodiments of the utility model, and do not limit the scope of the utility model. Without departing from the design spirit of the utility model, various modifications and improvements of the technical scheme of the utility model shall fall within the protection scope of the utility model.
Claims
1. A piston two-stroke heavy oil engine assembly fixing tool characterized by It is by fixed frame (1), fixed frame fixed screw (2), crankshaft fixed screw (3), crankcase fixed screw (4) constitutes;The fixed frame (1) structure has bottom plate (11), through hole 1 (12), fixed plate (13), through hole 2 (14), threaded hole (15), reinforcing rib (16);The fixed frame (1) is fixed to the tray of production line movement through fixed frame fixed screw (2), the crankcase fixed screw (4) is fixed through the cooperation of fixed frame (1) with crankcase (5), realizes the engine assembly with tray according to assembly process flow.
2. A piston two-stroke heavy fuel engine assembly fixture according to claim 1, characterized in that The fixed frame (1) is made of stainless steel material, which is assembled by welding of bottom plate (11), fixed plate (13) and reinforcing rib (16).
3. A kind of piston type two-stroke heavy oil engine assembly fixing tool according to claim 1, wherein The fixed frame fixed screw (2) passes through the through hole 1 (12) to connect the fixed frame (1) with the tray of production line movement, so as to realize the fixation of the fixed frame.
4. The assembly fixture for a two-stroke heavy oil engine according to claim 1, characterized in that The crankcase fixed screw (4) is connected and fixed with the crankcase (5) and the fixed frame (1) through the through hole 2 (14) after the crankshaft (7) is installed, the crankshaft fixed screw (3) is screwed into the threaded hole (15) and pressed against the process hole of the crankshaft (7) after the crankcase (5) is fixed, so as to install and fix the crankshaft (7) in place, prevent the rotation of the crankshaft (7) when the cylindrical pin (6) is pressed, and prevent the axial movement of the crankshaft (7) caused by the installation of the crankshaft (7) not in place.