High-strength engine balance shaft structure
By setting up components such as transmission gears, eccentric blocks, connecting sleeves and pressurized wheels on the engine balance shaft, the problem of insufficient lubrication is solved, good lubrication of the rotor bearing is achieved, and the strength and stability of the balance shaft are improved.
Patent Information
- Application Number
- CN202421770981.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-07-25
AI Technical Summary
The roller bearings of existing balance shafts are poorly lubricated, resulting in increased wear and temperature increase, reducing the working strength of the balance shaft.
A high-strength engine balance shaft structure is designed. By setting up components such as transmission gears, eccentric blocks, connecting sleeves, pressurized wheels and blades on the shaft, the fluidity and pressure of the lubricating oil are used to increase the lubricating oil into the rotor bearing to achieve forced lubricating.
It improves the lubrication effect of the rotor bearing, reduces wear, and enhances the overall strength and stability of the balance shaft.
Smart Images
Figure CN223063051U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engine balance shafts, and specifically relates to a high-strength engine balance shaft structure. Background Technique
[0002] In the working cycle of the engine, the movement speed of the piston is very fast and very uneven. At the top and bottom dead center positions, the speed of the piston is zero, while at the position in the middle between the top and bottom dead centers, the speed reaches the highest. Since the piston makes repeated high-speed linear motions in the cylinder, large inertial forces are inevitably generated on the piston, piston pin and connecting rod. The counterweights configured on the connecting rod can effectively balance these inertial forces. However, only a part of the moving mass of the counterweight on the connecting rod participates in the linear motion, and the other part participates in the rotation. Except for the top and bottom dead center positions, various inertial forces cannot be completely balanced, resulting in engine vibration.
[0003] For the existing balance shaft, roller bearings are mostly used to support the ends of the shaft. The forced lubrication effect of the bearings is not good. After long-term operation of the roller bearings, it is easy to have insufficient lubrication, resulting in increased wear and abnormal temperature rise, thereby reducing the working strength of the balance shaft. A balance shaft structure with forced lubrication is needed. Content of the Utility Model
[0004] The purpose of the utility model is to provide a high-strength engine balance shaft structure to solve the problems raised in the above background technique.
[0005] To achieve the above purpose, the utility model provides the following technical solutions:
[0006] A high-strength engine balance shaft structure includes a shaft rod. A transmission gear is fixedly sleeved at the middle position of the shaft rod. An eccentric block is fixedly sleeved at one end of the shaft rod. A connecting sleeve is fixedly sleeved on the outer side wall of the shaft rod on one side of the transmission gear. One end of the connecting sleeve is fixedly connected to a fixed sleeve. A rotor bearing is fixedly sleeved on the outer side wall of the fixed sleeve. An outer shaft sleeve is fixedly sleeved on the outer side wall of the outer ring of the rotor bearing.
[0007] Furthermore: The connection between the connecting sleeve and the fixed sleeve is a flange connection, and the connecting sleeve and the shaft rod are fixedly connected by bolts.
[0008] Furthermore: A liquid accumulation ring is fixedly sleeved on the inner wall of the outer shaft sleeve at a position on one side of the rotor bearing. The inner wall diameter of one end of the liquid accumulation ring close to the rotor bearing expands outward, and the inner wall of one end of the liquid accumulation ring is in a horn shape.
[0009] Furthermore, a plurality of liquid inlet holes are annularly and equidistantly formed in the outer side wall of the outer shaft sleeve. A guiding pipe is fixedly sleeved on the inner wall of the liquid inlet hole. One end of the guiding pipe located inside the outer shaft sleeve bends inwards, and one end of the guiding pipe is located inside the inner side wall of the liquid accumulation ring.
[0010] Furthermore, a pressure wheel is fixedly sleeved at a position on the outer side wall of the fixed sleeve at one end of the rotor bearing and the liquid accumulation ring. A plurality of blades are fixedly connected to the outer side wall of the pressure wheel in an annular and equidistant manner.
[0011] Furthermore, the guiding pipe is spiral, and the spiral direction of the guiding pipe is opposite to the spiral direction of the blades.
[0012] Furthermore, one end of the outer shaft sleeve is provided with an end head ring portion for sleeving the outer shell of the engine compartment. An end head ring groove is formed in the outer side wall of the end head ring portion, and a fixed ear is fixedly connected to one end of the outer shaft sleeve.
[0013] Furthermore, an impeller is fixedly sleeved at the other end of the shaft rod.
[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0015] 1. Through the arrangement of the pressure wheel and the outer shaft sleeve, when the shaft rod rotates, the lubricating oil in the chamber is driven to rotate in the same direction through the shaft rod and the transmission gear, so that the lubricating oil enters the guiding pipe from the liquid inlet hole during the movement process and flows to the liquid accumulation ring through the guiding pipe. When the shaft rod rotates, the pressure wheel is driven to rotate. Through the arrangement of the blades on the pressure wheel, when the blades revolve, the lubricating oil in the liquid accumulation ring is pushed towards the side where the rotor bearing is located, and at the same time, the lubricating oil is driven to rotate, increasing the pressure of the lubricating oil on the side of the rotor bearing, so as to facilitate the lubricating oil to enter the rotor bearing and achieve good lubrication of the rotor bearing. Description of the Drawings
[0016] Figure 1 is a schematic diagram of the overall structure of the utility model;
[0017] Figure 2 is a schematic diagram of the overall front view structure of the utility model;
[0018] Figure 3 is a schematic diagram of the internal structure of the outer shaft sleeve of the utility model;
[0019] Figure 4 is a schematic diagram of the structure of the pressure wheel of the utility model;
[0020] Figure 5 is a schematic diagram of the internal structure of the liquid accumulation ring of the utility model.
[0021] In the figure: 100, shaft rod; 110, transmission gear; 120, eccentric block; 130, impeller; 140, outer shaft sleeve; 141, end ring portion; 142, end ring groove; 143, liquid inlet hole; 144, guiding pipe; 145, liquid accumulation ring; 150, rotor bearing; 160, fixed sleeve; 170, connecting sleeve; 180, pressing wheel; 181, blade; 190, fixed ear. Detailed implementation mode
[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0023] Please refer to Figures 1 to 5 , in the embodiment of the present invention, a high-strength engine balance shaft structure includes a shaft rod 100. A transmission gear 110 is fixedly sleeved at the middle position of the shaft rod 100. An eccentric block 120 is fixedly sleeved at one end of the shaft rod 100. A connecting sleeve 170 is fixedly sleeved on the outer side wall of the shaft rod 100 on one side of the transmission gear 110. One end of the connecting sleeve 170 is fixedly connected to a fixed sleeve 160. A rotor bearing 150 is fixedly sleeved on the outer side wall of the fixed sleeve 160. An outer shaft sleeve 140 is fixedly sleeved on the outer side wall of the outer ring of the rotor bearing 150.
[0024] Specifically, the outer shaft sleeve 140 is fixedly connected to the engine compartment outer shell. The transmission gear 110 is in transmission engagement with the engine main shaft. When the main shaft rotates, it drives the shaft rod 100 to rotate, thereby driving the eccentric block 120 to rotate, and further offsetting the vibration generated when the main shaft rotates. When the shaft rod 100 rotates, it drives the fixed sleeve 160 to rotate. The fixed sleeve 160 and the outer shaft sleeve 140 are slidably connected through the rotor bearing 150. When the rotor bearing 150 rotates, it drives the lubricating oil in the compartment to lean towards and enter the rotor bearing 150 through the outer shaft sleeve 140 and the shaft rod 100, lubricating the rotor bearing 150, thereby improving the operating conditions of the rotor bearing 150 and increasing the overall strength of the balance shaft.
[0025] Embodiment 1
[0026] As Figures 1 to 5As shown, in this embodiment, the connection between the connecting sleeve 170 and the fixed sleeve 160 is a flange connection. The connecting sleeve 170 and the shaft rod 100 are fixed by bolts. On one side of the rotor bearing 150, a liquid accumulation ring 145 is fixedly sleeved on the inner wall of the outer shaft sleeve 140. The inner diameter of the end of the liquid accumulation ring 145 close to the rotor bearing 150 expands outward, and the inner wall of one end of the liquid accumulation ring 145 is in a horn shape. A plurality of liquid inlet holes 143 are annularly and equidistantly arranged on the outer side wall of the outer shaft sleeve 140. A guiding tube 144 is fixedly sleeved on the inner wall of the liquid inlet hole 143. The end of the guiding tube 144 inside the outer shaft sleeve 140 bends inward, and one end of the guiding tube 144 is located inside the inner side wall of the liquid accumulation ring 145. On the outer side wall of the fixed sleeve 160, at the position of the rotor bearing 150 and one end of the liquid accumulation ring 145, a pressurizing wheel 180 is fixedly sleeved. A plurality of blades 181 are annularly and equidistantly fixedly connected to the outer side wall of the pressurizing wheel 180. The guiding tube 144 is spiral, and the spiral direction of the guiding tube 144 is opposite to the spiral direction of the blades 181.
[0027] In this embodiment, when the shaft rod 100 rotates, the lubricating oil in the chamber is driven to rotate in the same direction through the shaft rod 100 and the transmission gear 110. As a result, the lubricating oil enters the guiding tube 144 from the liquid inlet hole 143 during the movement and flows onto the liquid accumulation ring 145 through the guiding tube 144. When the shaft rod 100 rotates, it drives the pressurizing wheel 180 to rotate. Due to the arrangement of the blades 181 on the pressurizing wheel 180, when the blades 181 revolve, the lubricating oil in the liquid accumulation ring 145 is pushed towards the side where the rotor bearing 150 is located, and at the same time, it drives the lubricating oil to rotate, increasing the pressure of the lubricating oil on one side of the rotor bearing 150, thus facilitating the lubricating oil to enter the rotor bearing 150 and achieving good lubrication inside the rotor bearing 150.
[0028] Embodiment Two
[0029] Based on Embodiment One, as Figures 1 to 5 shown, in this embodiment, one end of the outer shaft sleeve 140 is provided with an end head ring portion 141 for sleeving the outer shell of the engine compartment. An end head ring groove 142 is provided on the outer side wall of the end head ring portion 141. One end of the outer shaft sleeve 140 is fixedly connected with a fixed ear 190, and an impeller 130 is fixedly sleeved on the other end of the shaft rod 100.
[0030] During specific implementation, due to the arrangement of the end head ring groove 142, when loading the shaft rod 100, it is convenient to realize the positioning of the outer shaft sleeve 140 by the engagement of the limiting rod in the engine compartment with the end head ring groove 142 and facilitate determining the insertion depth. Due to the arrangement of the fixed ear 190, the fixed ear 190 is fixedly connected with the outer shell of the compartment to prevent the outer shaft sleeve 140 from rotating and improve the reliability of the outer shaft sleeve 140.
[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.
[0032] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A high-strength engine balance shaft structure, including a shaft rod (100), a transmission gear (110) is fixedly sleeved at the middle position of the shaft rod (100), and it is characterized in that, One end of the shaft rod (100) is fixedly sleeved with an eccentric block (120). On one side of the transmission gear (110), a connecting sleeve (170) is fixedly sleeved on the outer side wall of the shaft rod (100). One end of the connecting sleeve (170) is fixedly connected with a fixed sleeve (160). A rotor bearing (150) is fixedly sleeved on the outer side wall of the fixed sleeve (160). An outer shaft sleeve (140) is fixedly sleeved on the outer side wall of the outer ring of the rotor bearing (150).
2. The high-strength engine balance shaft structure according to claim 1, wherein The connection between the connecting sleeve (170) and the fixed sleeve (160) is a flange connection. The connecting sleeve (170) and the shaft rod (100) are fixedly secured by bolts.
3. A high-strength engine balance shaft structure according to claim 1, characterized in that, On the inner wall of the outer shaft sleeve (140), at a position on one side of the rotor bearing (150), a liquid accumulation ring (145) is fixedly sleeved. The inner wall diameter of one end of the liquid accumulation ring (145) close to the rotor bearing (150) expands outward, and the inner wall of one end of the liquid accumulation ring (145) is in a horn shape.
4. A high-strength engine balance shaft structure according to claim 2, characterized in that, A plurality of liquid inlet holes (143) are annularly and equidistantly formed on the outer side wall of the outer shaft sleeve (140). A guiding pipe (144) is fixedly sleeved on the inner wall of the liquid inlet hole (143). The end of the guiding pipe (144) inside the outer shaft sleeve (140) bends inward, and one end of the guiding pipe (144) is located inside the inner side wall of the liquid accumulation ring (145).
5. A high-strength engine balance shaft structure according to claim 3, characterized in that, On the outer side wall of the fixed sleeve (160), at a position between the rotor bearing (150) and one end of the liquid accumulation ring (145), a pressure wheel (180) is fixedly sleeved. A plurality of blades (181) are fixedly connected annularly and equidistantly on the outer side wall of the pressure wheel (180).
6. A high-strength engine balance shaft structure according to claim 4, characterized in that, The guiding pipe (144) is spiral, and the spiral direction of the guiding pipe (144) is opposite to the spiral direction of the blades (181).
7. The high-strength engine balance shaft structure according to claim 1, characterized in that, One end of the outer shaft sleeve (140) is provided with an end head ring part (141) for sleeving the outer shell of the engine compartment. An end head ring groove (142) is formed on the outer side wall of the end head ring part (141). A fixed ear (190) is fixedly connected to one end of the outer shaft sleeve (140).
8. A high-strength engine balance shaft structure according to claim 1, characterized in that, The other end of the shaft rod (100) is fixedly sleeved with an impeller (130).