Combined plunger for differential lock
By designing a split differential lock plunger, the problem of traditional plungers affecting parts that do not need to be demagnetized during demagnetization is solved, allowing for individual replacement of damaged parts, reducing maintenance costs and improving maintenance convenience.
Patent Information
- Application Number
- CN202520689496.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-04-14
AI Technical Summary
Traditional plungers can easily damage parts that do not need to be demagnetized during demagnetization, and if the entire plunger is damaged, it needs to be replaced, increasing maintenance costs.
The plunger is designed as a split type, consisting of an inner ring, an outer ring, and teeth, each of which is machined and demagnetized separately, and damaged parts are replaced individually.
This avoids the impact of demagnetization on parts that do not require demagnetization, reduces maintenance costs, and improves maintenance convenience.
Smart Images
Figure CN223839699U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the automotive field, specifically a combined plunger for a differential lock. Background Technology
[0002] The power of a car engine is transmitted through the clutch, transmission, and drive shaft to the drive axle, and then distributed to the left and right half-shafts to drive the wheels. In this power transmission path, the drive axle is the last assembly, and its main components are the reducer and the differential.
[0003] The function of a differential is to transmit power to both half-shafts while allowing them to rotate at different speeds, so that the wheels on both sides can travel unequal distances by rolling as much as possible, thus reducing the sliding friction between the tires and the ground.
[0004] A differential lock forces the two half-shafts to rotate at the same speed instead of the other way around, allowing the car to maintain power output even when one wheel slips, thus getting out of trouble.
[0005] Currently, differential locks generally use electromagnetic means to drive the plunger's toothed arm to mesh with a predetermined position, thereby causing the half-shaft inserted into the plunger and the housing to rotate together. The housing then links the other half-shaft to complete the equal speed movement of the two half-shafts.
[0006] The plunger needs to be fitted onto the half-shaft. During electromagnetic drive, in order to avoid the magnetic field affecting the half-shaft, the inner ring of the plunger needs to be non-magnetic. In order for the plunger to be driven electromagnetically, the outer ring of the plunger needs to be magnetic. Only in this way can the plunger be driven to move on the half-shaft electromagnetically.
[0007] Traditional plungers are formed from a single piece of metal. When the inner ring is demagnetized after forming, the demagnetization process can easily affect the outer ring, thus affecting the working condition of the plunger. Utility Model Content
[0008] Purpose of the utility model: To provide a combined plunger for differential locks to solve the above-mentioned problems existing in the prior art.
[0009] Technical solution: A combined plunger for a differential lock, comprising:
[0010] The inner ring portion includes an inner ring body and multiple sets of inner ring grooves formed on the inner ring body;
[0011] The inner ring body has an inner ring through hole that passes through the inner ring groove group;
[0012] The outer ring portion, sleeved on the inner ring portion, includes multiple sets of outer ring components connected end to end. Each set of outer ring components includes an outer ring body and multiple outer ring posts disposed at the ends of the outer ring body. The multiple outer ring posts are spaced at a predetermined distance.
[0013] The toothed part is designed in multiple sets, including toothed arms and toothed groups connected to the toothed arms and passing through a predetermined distance between multiple outer ring columns and adapted to the inner ring groove set, wherein the toothed groups have threaded holes.
[0014] A connecting rod passes through the threaded hole and the inner ring through hole, fixing the inner ring, outer ring and toothed parts relative to each other. The connecting rod has a thread that matches the threaded hole.
[0015] This utility model designs the outer ring, inner ring, and toothed part of the plunger as separate parts, which can be processed separately during manufacturing. After processing, the parts that need to be demagnetized can be demagnetized, avoiding the problem of the parts that do not need to be demagnetized being affected during the demagnetization process of traditional one-piece plungers.
[0016] At the same time, this split design allows for individual replacement of a single plunger component if it is damaged, reducing the maintenance cost of the differential lock and thus reducing the overall maintenance cost of the differential.
[0017] When this application is used on a differential, it is fitted onto one half-shaft of the differential. In use, the plunger is driven to move on the half-shaft by electromagnetic means, pushing the plunger's tooth arm to a predetermined position (usually the differential housing), thereby linking the left and right half-shafts to complete the work.
[0018] The detachable design of this application allows for individual maintenance during actual use. Generally, the gear arm experiences the highest wear due to the stress it bears. This detachable design allows for the replacement of the gear arm separately without replacing the entire plunger. Consequently, when replacing the gear arm, there is no need to disassemble the half-shaft, avoiding excessive disassembly of the differential and improving the ease of maintenance.
[0019] In a further embodiment, each set of inner annular grooves includes:
[0020] Two inner ring sink grooves are designed, one on each side of the inner ring body;
[0021] An inner ring through groove is formed on the inner ring body and located between the two inner ring sink grooves.
[0022] The inner ring groove assembly is designed to accommodate the gear assembly, thereby allowing the inner and outer ring parts to be relatively fixed through the teeth.
[0023] In a further embodiment, the inner ring through hole connects the inner ring sink groove and the inner ring through groove.
[0024] In a further embodiment, the tooth assembly includes:
[0025] Short teeth, designed in two sets, connected to the tooth arm and adapted to the inner ring recess;
[0026] The long tooth is connected to the tooth arm, located between the two sets of short teeth, and is adapted to the inner ring groove.
[0027] By designing the gear assembly to fit the inner ring groove assembly, the relative fixation of the inner and outer ring parts is achieved.
[0028] In a further embodiment, an outer ring wall is provided on one side of the outer ring body.
[0029] In a further embodiment, the inner ring body has an inner ring wall groove on its side that is adapted to the outer ring wall, and the inner wall of the inner ring body has a shaft groove.
[0030] The shaft groove is designed so that the inner ring can rotate with the half shaft, and can slide along the half shaft when driven by electromagnetic force.
[0031] By designing grooves in the outer and inner ring walls, the inner ring body can be aligned when it is installed into the outer ring body, avoiding misalignment and facilitating assembly.
[0032] Beneficial effects: This utility model discloses a combined plunger for differential lock. By designing the outer ring, inner ring and toothed part of the plunger as separate parts, it can be processed separately during processing. After processing, the parts that need to be demagnetized can be demagnetized, which avoids the impact on the parts that do not need to be demagnetized during the demagnetization process of traditional one-piece plungers.
[0033] At the same time, this split design allows individual plunger components to be replaced if they are damaged, reducing the maintenance cost of the differential lock and thus the overall maintenance cost of the differential. Attached Figure Description
[0034] Figure 1 This is a schematic diagram of the structure of this utility model.
[0035] Figure 2 This is a first-person perspective exploded view of the component structure of this utility model.
[0036] Figure 3 This is a second-view exploded structural diagram of the component of this utility model.
[0037] The attached figures are labeled as follows:
[0038] 1. Inner ring section; 11. Inner ring body; 12. Shaft groove; 13. Inner ring recessed groove; 14. Inner ring through groove; 15. Inner ring through hole; 16. Inner ring wall groove;
[0039] 2. Outer ring; 21. Outer ring body; 22. Outer ring wall; 23. Outer ring column;
[0040] 3. Tooth; 31. Tooth arm; 32. Short tooth; 33. Long tooth; 34. Connecting rod. Detailed Implementation
[0041] This application relates to a combined plunger for a differential lock. The main function of the differential is to adjust the speed difference between the left and right wheels, ensuring that the drive wheels on both sides can rotate at different speeds, thereby adapting to the needs of the car when turning or driving on uneven roads.
[0042] Specifically, a differential slows down the inner wheels and speeds up the outer wheels when a car turns, ensuring a smooth turn. Furthermore, on uneven surfaces, the differential allows the left and right wheels to roll at different speeds, providing a reasonable torque distribution and ensuring that both drive wheels perform pure rolling motion.
[0043] The working principle of a differential is based on the rotational characteristics of planetary gears. When the vehicle is traveling straight, the planetary gears do not rotate, and the power is evenly distributed to the left and right output shafts. However, when turning, such as turning left, the left wheel slows down or even stops, while the right wheel moves, causing the planetary gears to rotate and transfer more power to the right output shaft, thus enabling a smooth turn.
[0044] A differential lock forces the unequal rotation of the two half-shafts to equal rotation, allowing the car to maintain power output even when one wheel slips, thus escaping a predicament.
[0045] Currently, differential locks generally use electromagnetic means to drive the plunger's toothed arm to mesh with a predetermined position, thereby causing the half-shaft inserted into the plunger and the housing to rotate together. The housing then links the other half-shaft to complete the equal speed movement of the two half-shafts.
[0046] The plunger needs to be fitted onto the half-shaft. During electromagnetic drive, in order to avoid the magnetic field affecting the half-shaft, the inner ring of the plunger needs to be non-magnetic. In order for the plunger to be driven electromagnetically, the outer ring of the plunger needs to be magnetic. Only in this way can the plunger be driven to move on the half-shaft electromagnetically.
[0047] Traditional plungers are formed from a single piece of metal. When the inner ring is demagnetized after forming, the demagnetization process can easily affect the outer ring, thus affecting the working condition of the plunger.
[0048] This application designs the outer ring, inner ring, and toothed part of the plunger as separate parts, which can be processed individually during machining. After machining, the parts that need to be demagnetized can be demagnetized, avoiding the problem of the parts that do not need to be demagnetized being affected during the demagnetization process of traditional one-piece plungers.
[0049] The following detailed explanation uses specific implementation methods.
[0050] A combination plunger for a differential lock, comprising:
[0051] The inner ring portion 1 includes an inner ring body 11 and multiple sets of inner ring grooves formed on the inner ring body 11;
[0052] The inner ring body 11 has an inner ring through hole 15 that passes through the inner ring groove group;
[0053] Each set of inner annular grooves includes:
[0054] Two inner ring sink grooves 13 are designed, one on each side of the inner ring body 11.
[0055] The inner ring groove 14 is formed on the inner ring body 11 and is located between the two inner ring sink grooves 13.
[0056] The inner ring groove is designed to accommodate the gear assembly, and the inner ring 1 and outer ring 2 can be relatively fixed by the tooth 3.
[0057] The inner ring groove 14 penetrates the inner ring body 11. This design facilitates the cleaning of the inner ring body 11. When using ultrasonic or manual cleaning, the inner ring recessed groove 13 is located on the side of the inner ring body 11 and has an opening at the side, while the inner ring groove 14 does not have an opening at the side. By having the inner ring groove 14 penetrate the inner ring body 11, the cleaning effect is better than that of not penetrating the inner ring body 11.
[0058] The inner ring through hole 15 passes through the inner ring sink groove 13 and the inner ring through groove 14.
[0059] In the embodiments of this application, three sets of inner ring grooves are designed;
[0060] The outer ring 2 is fitted onto the inner ring 1 and includes multiple sets of outer ring components connected end to end. Each set of outer ring components includes an outer ring body 21 and multiple outer ring posts 23 disposed at the end of the outer ring body 21. The multiple outer ring posts 23 are spaced apart by a predetermined distance.
[0061] In the embodiments of this application, each group of outer ring components has two outer ring posts 23.
[0062] The outer ring post 23 is formed by opening a predetermined outer ring recessed groove and an outer ring through groove on the outer ring body 21.
[0063] The toothed part 3 is designed in multiple sets, including toothed arms 31 and toothed groups connected to the toothed arms 31 and passing through a predetermined distance between multiple outer ring posts 23 and adapted to the inner ring groove group. The toothed groups have threaded holes.
[0064] The tooth assembly includes:
[0065] Short teeth 32 are designed in two sets, which are connected to the toothed arm 31 and adapted to the inner ring recess 13;
[0066] The long tooth 33 is connected to the tooth arm 31, located between the two sets of short teeth 32, and is adapted to the inner ring groove 14.
[0067] By designing the gear assembly to fit the inner ring groove assembly, the relative fixation of the inner ring 1 and the outer ring 2 is achieved.
[0068] A connecting rod 34 passes through the threaded hole and the inner ring through hole 15, fixing the inner ring part 1, the outer ring part 2, and the toothed part 3 relative to each other. The connecting rod 34 has a thread that matches the threaded hole.
[0069] This utility model designs the outer ring 2, inner ring 1 and tooth 3 of the plunger as separate parts, which can be processed separately during processing and the parts that need to be demagnetized can be demagnetized after processing. This avoids the problem that the demagnetization process of the traditional one-piece plunger affects the parts that do not need to be demagnetized.
[0070] At the same time, this split design allows for individual replacement of a single plunger component if it is damaged, reducing the maintenance cost of the differential lock and thus reducing the overall maintenance cost of the differential.
[0071] When this application is used on a differential, it is fitted onto the half-shaft on one side of the differential. When in use, the plunger is driven to move on the half-shaft by electromagnetic means, pushing the plunger's tooth arm 31 to a predetermined position (usually the differential housing), thereby linking the left and right half-shafts to complete the work.
[0072] The detachable design of this application allows for individual maintenance during actual use. Generally, due to the stress on the gear arm 31, the wear on the gear arm 31 is the highest. This detachable design allows for the replacement of the gear arm 31 separately without replacing the entire plunger. Consequently, when replacing the gear arm 31, there is no need to disassemble the half shaft, avoiding excessive disassembly of the differential and improving the ease of maintenance.
[0073] Traditionally, when replacing a plunger, the plunger needs to be removed from the half-shaft. Therefore, when removing the plunger, the half-shaft needs to be removed, and when removing the half-shaft, the differential needs to be removed.
[0074] The outer ring body 21 has an outer ring wall 22 on one side.
[0075] The inner ring body 11 has an inner ring wall groove 16 that is adapted to the outer ring wall (22) on its side, and the inner wall of the inner ring body 11 has a shaft groove 12.
[0076] The shaft groove 12 is designed so that the inner ring 11 can rotate with the half shaft, and can slide along the half shaft when driven by electromagnetic force.
[0077] By designing the outer ring wall 22 and the inner ring wall groove 16, the inner ring body 11 can be aligned when it is installed into the outer ring body 21, avoiding misalignment and making it easier to assemble.
[0078] Working principle description: During assembly, the outer ring body 21 is inserted into the inner ring body 11. At this time, the outer ring wall 22 is adapted to the inner ring wall groove 16. The short teeth 32 and long teeth 33 of the multiple sets of teeth 3 are adapted to the inner ring recess 13 and the inner ring through groove 14 through the sides and between the two outer ring pillars 23. The connecting rod 34 is inserted into the inner ring through hole 15 and the threaded hole to complete the relative fixation of the inner ring 1, the outer ring 2, and the teeth 3.
[0079] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.
Claims
1. A combined plunger for a differential lock, characterized in that, include: The inner ring portion (1) includes an inner ring body (11) and multiple sets of inner ring grooves formed on the inner ring body (11), wherein the inner ring body (11) has an inner ring through hole (15) that passes through the inner ring grooves. The outer ring (2) is fitted onto the inner ring (1) and includes multiple sets of outer ring components connected end to end. Each set of outer ring components includes an outer ring body (21) and multiple outer ring posts (23) disposed at the end of the outer ring body (21). The multiple outer ring posts (23) are spaced at a predetermined distance. The toothed part (3) is designed in multiple groups, including toothed arms (31) and toothed groups connected to the toothed arms (31) and passing through a predetermined distance between multiple outer ring columns (23) and adapted to the inner ring groove group, wherein the toothed groups have threaded holes. The connecting rod (34) passes through the threaded hole and the inner ring through hole (15) to fix the inner ring (1), outer ring (2) and toothed part (3) relative to each other. The connecting rod (34) has a thread that matches the threaded hole.
2. A combined plunger for a differential lock according to claim 1, characterized in that: Each set of inner annular grooves includes: Two inner ring sink grooves (13) are designed and are respectively opened on both sides of the inner ring body (11); The inner ring through groove (14) is formed on the inner ring body (11) and is located between the two inner ring sink grooves (13).
3. A combined plunger for a differential lock according to claim 2, characterized in that: The inner ring through hole (15) connects the inner ring sink groove (13) and the inner ring through groove (14).
4. A combined plunger for a differential lock according to claim 1, characterized in that: The tooth assembly includes: Short teeth (32) are designed in two sets, which are connected to the toothed arm (31) and adapted to the inner ring recess (13); The long tooth (33) is connected to the tooth arm (31), located between the two sets of short teeth (32), and is adapted to the inner ring groove (14).
5. A combined plunger for a differential lock according to claim 1, characterized in that: The outer ring body (21) has an outer ring wall (22) on one side.
6. A combined plunger for a differential lock according to claim 5, characterized in that: The inner ring body (11) has an inner ring wall groove (16) on its side that is adapted to the outer ring wall (22).