CN105605186A - Inner biphasic shock wave roller pin and roller block type automobile differential - Google Patents

Abstract

The utility model relates to an inner two-phase shock wave needle roller block type automobile differential, which belongs to the technical field of mechanical transmission. The invention provides a new type of automobile differential. The outside of the outer tooth inner cage is a bevel gear, and the inside is a sleeve structure. The power is input from the bevel gear outside the outer tooth inner cage and transmitted through the outer tooth inner cage To the needle roller block, the needle roller block then transmits the power to the left half shaft center wheel connected to the left wheel and the right half shaft dual-phase inner cam connected to the right wheel, so that the left and right wheels realize differential speed . The automotive differential eliminates the planetary gear system in the traditional automotive differential, and there are multiple teeth between the needle roller block and the center wheel of the left half shaft, the inner cage of the outer teeth and the double-phase inner cam of the right half shaft. The meshing and meshing are all pure rolling contact connections, so the automobile differential has compact structure, small size, light weight, multi-tooth meshing, large coincidence, strong bearing capacity, and high transmission efficiency. It can be widely used in various applications that require differentials. Wheeled vehicles, such as automobiles, engineering vehicles, etc.

Description

Inner two-phase shock needle roller block type automotive differential

technical field

The invention relates to an inner two-phase shock wave needle roller block type automobile differential, which is used for the differential speed of wheeled vehicles and belongs to the technical field of mechanical transmission.

Background technique

At present, the commonly used automotive differentials use a planetary gear system composed of multiple straight-toothed bevel gears to achieve the purpose of differential speed. Although this system can realize the differential speed of the left and right axle shafts of the car, there are many components in the system. , the axial and radial dimensions are large, the volume is large, and the weight is heavy, especially for heavy-duty vehicles, in order to achieve differential speed and transmit sufficient power, the volume and weight will be further increased; straight bevel gear transmission is also It has the disadvantages of low coincidence, low bearing capacity, low transmission efficiency, difficult processing of straight bevel gears, and poor manufacturability.

Contents of the invention

The object of the present invention is: in order to overcome the above-mentioned shortcomings existing in the existing automobile differential, the present invention provides a simple and compact structure, small axial and radial dimensions, light weight, high coincidence degree, large bearing capacity, and high transmission efficiency. A new type of automotive differential - inner two-phase shock needle roller block type automotive differential.

The technical solution adopted by the present invention to solve the technical problem is: an inner two-phase shock wave needle roller block type automobile differential, which is mainly composed of an outer tooth inner cage (1), a left half shaft center wheel (2 ), tapered roller bearing (3), right half shell (4), needle roller block (5), right half shaft dual-phase internal cam (6), deep groove ball bearing (7), screw (8), Deep groove ball bearings (9), needle rollers (10), sleeve gaskets (12), and deep groove ball bearings (13), are characterized in that the planetary gear system of the traditional automotive differential is abandoned and replaced by "External gear inner cage - needle roller block - left half shaft center wheel - right half shaft dual-phase inner cam" system, this system mainly includes outer gear inner cage (1), needle roller block (5) , left half-shaft center wheel (2), right half-shaft two-phase inner cam (6), this system realizes the differential speed and constitutes the differential gear; the outside of the outer gear inner cage (1) is the driven drive of the main reducer Straight-toothed bevel gears have a sleeve structure inside, and there are Z ₁ radial guide grooves along the circumference of the sleeve structure, and needle roller blocks (5) are installed in the guide grooves, so the sleeve structure is called a cage , so the outer tooth inner cage (1) is not only a bevel gear of the final drive, but also a component of the differential mechanism, and the outer tooth inner cage (1) organically combines the final drive and the differential into a In one body, the inner cage (1) of the outer teeth and the right half shell (4) are fixedly connected by screws (8) to form a whole and supported on the frame by a pair of tapered roller bearings (3); the above-mentioned needle roller block (5) It is composed of bracket block (16), pin (17), needle roller (18) and needle roller sleeve (19). For tight fit, the needle roller sleeve (19) installed at both ends of the bracket block (16) is supported by the pin (17) and forms a rolling connection with the bracket block (16) through the needle roller (18); 1) On the inner wall of the radial guide groove of the sleeve structure, there is a groove for accommodating needle rollers (10) in the radial direction, and several needle rollers (10) are installed in the groove, and the needle roller block (5) It is installed in the radial guide groove of the sleeve structure of the outer tooth inner cage (1) and can move radially in the guide groove. The bracket block (16) of the needle roller block (5) passes through several The needle roller (10) and the radial guide groove of the outer tooth inner cage (1) form a rolling connection relationship, that is, the needle roller (10) in the guide groove makes the needle roller block (5) and the outer tooth inner cage (1) ) is changed from sliding friction to rolling friction; the left half shaft center wheel (2) is a multi-phase outer cam, and the multi-phase outer cam is an outer cam with a plurality of outer convex parts, and the number of outer convex parts It is called the number of teeth of the left half shaft center wheel (2), denoted as Z ₂ , the contour curve of the multi-phase outer cam is that the needle roller block (5) rotates with the outer tooth inner cage (1) on the one hand, and the other On the other hand, in the process of moving in the radial guide groove of the inner cage (1) of the outer teeth, the envelope of a series of positions of the needle roller sleeve (19) at the inner end, the center wheel of the left half shaft (2) is embedded in the In the sleeve structure of the outer tooth inner cage (1), the left end of the center wheel of the left half shaft (2) is the left half shaft , the left half shaft center wheel (2) is connected with the left rear wheel (14) through the left half shaft, and the right end of the left half shaft center wheel (2) is supported on the right half shaft dual-phase inner cam ( 6), the left end is supported in the outer tooth inner cage (1) through the deep groove ball bearing (13); It is a double eccentric circle or ellipse two-phase inner cam, and its own mass is completely balanced. The sleeve structure of the outer tooth inner cage (1) is embedded in the right half-shaft double-phase inner cam (6), and the right half-shaft double-phase The inner phase cam (6) is supported in the right half shell (4) by a pair of deep groove ball bearings (7). (6) Connect with the right rear wheel (15) through the right half shaft; the needle roller sleeves (19) at both ends of the needle roller block (5) are respectively connected with the inner cam of the right half shaft dual-phase inner cam (6) The profile meshes with the outer cam profile of the left half-shaft center wheel (2) to form a pure rolling high pair; the number of teeth Z ₂ of the left half-shaft center wheel (2) is different from the number Z ₁ of the needle roller blocks (5) for 2.

Other unmentioned places of differential of the present invention, all adopt prior art as the connection etc. of left axle center wheel (2), right axle dual-phase inner cam (6) and vehicle wheel.

Compared with prior art, main inventive point of the present invention is:

①The present invention replaces the planetary gear system of the traditional automobile differential with the system of "external gear inner cage-needle roller block-left half shaft center wheel-right half shaft dual-phase inner cam". The cage, the needle roller block, the center wheel of the left half shaft, and the double-phase inner cam of the right half shaft, realize the differential speed with this system, and constitute the differential gear.

②The outside of the outer tooth inner cage is the driven straight bevel gear of the main reducer, and the inside is a sleeve structure. There are Z ₁ radial guide grooves along the circumference of the sleeve structure, and needle rollers are installed in the guide grooves. Therefore, the sleeve structure is called a cage, so the outer tooth inner cage is not only a bevel gear of the final reducer, but also a component of the differential mechanism, and the outer tooth inner cage connects the final reducer and the differential The gearbox is organically integrated, the inner cage of the outer teeth and the right half shell are fixed and connected into a whole by screws and supported on the frame by a pair of tapered roller bearings; Composed of needle roller and needle roller sleeve, the two ends of the pin are closely fitted with the holes on both sides of the bracket block, and the needle roller sleeve installed at both ends of the bracket block is supported by the pin and is rollingly connected with the bracket block through the needle roller Relationship; on the inner wall of the radial guide groove of the sleeve structure of the inner cage of the outer teeth, there are grooves for accommodating needle rollers in the radial direction, and several needle rollers are installed in the grooves, and the needle roller blocks are installed in the outer teeth The radial guide groove of the sleeve structure of the cage can move radially in the guide groove. The support block of the needle roller block is composed of several needle rollers in the guide groove and the radial guide groove of the inner cage of the outer teeth. The rolling connection relationship, that is, the needle roller in the guide groove makes the contact between the needle roller block and the inner cage of the outer teeth change from sliding friction to rolling friction; the center wheel of the left half shaft is a multi-phase outer cam, and the multi-phase outer The cam is an external cam with multiple protruding parts. The number of protruding parts is called the number of teeth of the center wheel of the left half shaft. During the rotation of the frame and the movement in the radial guide groove of the inner cage of the outer teeth, the envelope line of a series of positions of the needle roller sleeve at the inner end, the center wheel of the left half shaft is embedded in the outer teeth and held In the sleeve structure of the frame, the left end of the center wheel of the left half shaft is the left half shaft, the center wheel of the left half shaft is connected with the left rear wheel through the left half shaft, and the right end of the center wheel of the left half shaft is supported on the right half shaft The shaft is inside the dual-phase internal cam, and the left end is supported in the external tooth internal cage through deep groove ball bearings; the right half-shaft dual-phase internal cam is a dual-phase internal cam, and the interior of the dual-phase internal cam is a double eccentric circle or ellipse Shaped two-phase inner cam, its own mass is completely balanced, the sleeve structure of the outer tooth inner cage is embedded in the right half-shaft double-phase inner cam, and the right half-shaft double-phase inner cam is supported by a pair of deep groove ball bearings In the right half shell, the right end of the double-phase inner cam of the right half shaft is the right half shaft, and the double-phase inner cam of the right half shaft is connected with the right rear wheel through the right half shaft; the needle roller sleeves at both ends of the needle roller block are respectively Mesh with the inner cam profile of the double-phase inner cam of the right half shaft and the outer cam profile of the left half shaft center wheel to form a pure rolling high pair; the number of teeth of the left half shaft center wheel Z ₂ and the number of needle roller blocks Z ₁ differs by 2.

③The driving force is transmitted to the inner cage of the external teeth, and then transmitted to the center wheel of the left half shaft and the double-phase inner cam of the right half shaft through the needle roller block, so as to be transmitted to the left and right rear wheels, and the needle roller block and the outer shaft The gear inner cage, the center wheel of the left half shaft, and the two-phase inner cam of the right half shaft are all connected by pure rolling friction, so the transmission efficiency of the differential gear of the present invention is high.

④Multi-tooth engagement between the needle roller block and the center wheel of the left half shaft, the inner cage of the outer teeth and the double-phase inner cam of the right half shaft, so the overlap degree is large, the load capacity is large, and high power and torque can be realized Differential drive.

Compared with the existing conventional automobile differential, the present invention has the following beneficial technical effects:

1. Compact structure, small axial and radial dimensions, small volume and light weight

The present invention adopts the system of "external gear inner cage-needle roller block-left half-shaft center wheel-right half-shaft dual-phase inner cam" system to replace the planetary gear system of the traditional automobile differential, the axial and radial direction of the transmission device The dimensions are all small, so the differential of the present invention has compact structure, small volume and light weight.

2. Large coincidence degree and high carrying capacity

In the present invention, the needle roller block and the outer cam profile of the center wheel of the left half shaft, the inner cage of the outer teeth, and the inner profile of the dual-phase inner cam of the right half shaft are all meshed with multiple teeth, and there can be 50% of the rolling at most. The needle and roller blocks participate in the meshing work at the same time, with high coincidence and high bearing capacity, which can realize high-power and high-torque differential transmission.

3. High transmission efficiency

The needle roller block is connected with the inner cage of the outer teeth, the double-phase inner cam of the right half shaft, and the center wheel of the left half shaft are all connected by pure rolling friction, so the transmission efficiency of the differential gear of the present invention is high.

4. Good manufacturability and low production cost

Most of the parts in the differential gear of the present invention are circular, simple in shape, easier to process than bevel gears in the planetary gear system, good in manufacturability and low in production cost.

Description of drawings

The present invention will be further described below in conjunction with drawings and embodiments. However, it should be pointed out that the specific implementation modes of the present invention are not limited to the forms described in the following examples, and those skilled in the art can easily design other specific implementation modes without paying creative efforts. Therefore, the examples of specific implementations given below should not be understood as the protection scope of the present invention, and the protection scope of the present invention is limited to the given examples.

Fig. 1 is a schematic diagram of the structure of the inner two-phase shock needle roller block type automobile differential;

Fig. 2 is A-A sectional view of Fig. 1;

Fig. 3 is a partial enlarged view of Fig. 2;

Fig. 4 is a structural schematic diagram of the dual-phase internal cam of the right half shaft;

Fig. 5 is a structural schematic diagram of the center wheel of the left half shaft;

Fig. 6 is a schematic structural view of the inner cage of the outer teeth;

Figure 7 is a schematic diagram of the assembly of the needle roller block;

Fig. 8 is the structural representation of support block;

Fig. 9 is a schematic diagram of the differential transmission of the inner two-phase shock needle roller block type automobile differential;

Fig. 10 is a schematic diagram of the relative positional relationship between the wheels and the differential when the car turns left.

The identification objects of the graphic symbols in the above drawings are: 1. The inner cage of the external teeth; 2. The center wheel of the left half shaft; 3. The tapered roller bearing; 4. The right half shell; In-phase cam; 7 deep groove ball bearing; 8 screw; 9 deep groove ball bearing; 10 needle roller; 11 driving spur bevel gear of final reducer; ; 15 right rear wheel; 16 bracket block; 17 pin; 18 needle roller; 19 needle roller sleeve.

detailed description

The inner two-phase shock wave needle roller block type automobile differential shown in Fig. 1 to Fig. 8 is mainly composed of the outer tooth inner cage (1), the left half shaft center wheel (2), and the tapered roller bearing (3) , right half-shell (4), needle roller block (5), right half-shaft dual-phase inner cam (6), deep groove ball bearing (7), screw (8), deep groove ball bearing (9), roller Needle (10), sleeve gasket (12), deep groove ball bearing (13), characterized in that: the planetary gear system of the traditional automotive differential is abandoned, replaced by "outer teeth inner cage-needle roller Roller block-left half-shaft center wheel-right half-shaft dual-phase inner cam" system, the system mainly includes external tooth inner cage (1), needle roller block (5), left half-shaft center wheel (2) 1. Two-phase inner cam (6) on the right half shaft, with this system to realize the differential speed and constitute the differential gear; the outer tooth inner cage (1) is the driven spur bevel gear of the final drive, and the inner is the sleeve There are Z ₁ radial guide grooves along the circumference of the sleeve structure, and the needle roller block (5) is installed in the guide grooves, so the sleeve structure is called a cage, so the outer tooth inner cage (1 ) is not only a bevel gear of the main reducer, but also a component of the differential mechanism. The outer tooth inner cage (1) organically integrates the main reducer and the differential, and the outer tooth inner cage (1) ) and the right half shell (4) are fixedly connected as a whole by screws (8) and are supported on the frame by a pair of tapered roller bearings (3); , pin (17), needle roller (18), needle roller sleeve (19), the two ends of the pin (17) and the holes on both sides of the bracket block (16) are tight fit, installed on the bracket block ( 16) The needle roller sleeves (19) at both ends are supported by the pins (17) and form a rolling connection relationship with the bracket block (16) through the needle rollers (18); the radial guide of the sleeve structure of the outer tooth inner cage (1) The inner wall of the groove is radially opened with grooves for accommodating needle rollers (10), and several needle rollers (10) are installed in the grooves, and the needle roller blocks (5) are installed in the inner cage (1) of the outer teeth In the radial guide groove of the sleeve structure and can move radially in the guide groove, the support block (16) of the needle roller block (5) passes through several needle rollers (10) in the guide groove and the inner teeth of the outer teeth The radial guide groove of the cage (1) forms a rolling connection relationship, that is, the needle roller (10) in the guide groove makes the contact between the needle roller block (5) and the outer tooth inner cage (1) change from sliding friction to is rolling friction; the left half-shaft center wheel (2) is a multi-phase outer cam, and the multi-phase outer cam is an outer cam with multiple convex parts, and the number of its convex parts is called the left half-axis center wheel (2 ) number of teeth, denoted as Z ₂ , the contour curve of the multi-phase outer cam is that the needle roller block (5) rotates with the inner cage (1) of the outer teeth on the one hand, and rotates with the inner cage (1) of the outer teeth on the other hand. ) in the process of moving in the radial guide groove, the envelope of a series of positions of the needle roller sleeve (19) at the inner end, the center wheel of the left half shaft (2) is embedded in the outer tooth inner cage (1) In the sleeve structure, the left end of the left half shaft center wheel (2) is the left half shaft, and the left half shaft center wheel (2) connects with the left half shaft The left rear wheel (14) is connected, the right end of the left half-shaft center wheel (2) is supported in the right half-shaft dual-phase inner cam (6) through a deep groove ball bearing (9), and the left end is passed through a deep groove ball bearing (13) Supported in the inner cage (1) of the outer teeth; the right half-axis dual-phase internal cam (6) is a dual-phase internal cam, and the interior of the dual-phase internal cam is an elliptical two-phase internal cam, and its own mass is completely balanced. The sleeve structure of the outer gear inner cage (1) is embedded in the right half-shaft double-phase inner cam (6), and the right half-shaft double-phase inner cam (6) is supported by a pair of deep groove ball bearings (7). In the right half shell (4), the right end of the right half-shaft dual-phase inner cam (6) is the right half-shaft, and the right half-shaft dual-phase inner cam (6) is connected together with the right rear wheel (15) through the right half-shaft; The needle roller sleeves (19) at both ends of the needle roller block (5) mesh with the inner cam profile of the right half-shaft dual-phase inner cam (6) and the outer cam profile of the left half-shaft center wheel (2) respectively. A pure rolling high pair; the difference between the number of teeth Z ₂ of the left half shaft center wheel (2) and the number Z ₁ of the needle roller block (5) is 2.

The working principle of the differential in the present invention is: when the driven bevel gear of the main reducer, that is, the inner cage (1) of the outer teeth is driven and rotates at a constant angular velocity, the radial guide groove of the inner cage (1) of the outer teeth The needle roller block (5) generates a thrust, and the needle roller block (5) contacts and engages with the center wheel of the left half shaft (2) and the double-phase inner cam (6) of the right half shaft at the same time and pushes them to rotate, and thus At the same time, the needle roller block (5) is also moving in the radial guide groove of the inner cage (1) of the outer teeth, thereby forming a two-degree-of-freedom differential system, the center wheel (2) of the left half shaft and the two-phase inner cam of the right half shaft (6) The motion and power on (6) are passed to the left and right rear wheels connected with it respectively. The dual-phase internal cam (6) of the right half shaft and the center wheel (2) of the left half shaft rotate separately under the action of the driving force, but their respective motion states are uncertain, determined by the different road surfaces and curve conditions of the left and right rear wheels . When the car is running straight on a straight road and there is no speed difference between the wheel on the left half shaft center wheel (2) and the wheel on the right half shaft dual-phase internal cam (6), the left half shaft center wheel (2) and the right half shaft The rotational speeds of the two-phase inner cams (6) of the shaft are the same, that is, the differential does not have a differential effect. At this time, all components in the differential remain relatively stationary, and the torque is input from the outer gear inner cage (1), and is evenly transmitted to the center wheel of the left half shaft (2) and the right half shaft through the needle roller block (5). Dual-phase internal cam (6). When the car is turning or driving on an uneven road, when there is a speed difference between the left and right wheels at the rear, the needle roller block (5) is driven by the inner cage (1) of the outer teeth, and on the one hand drives the center wheel of the left half shaft (2) and the double-phase inner cam (6) of the right half shaft rotates, and on the other hand, while rotating with the inner cage (1) of the outer teeth, it moves radially in the radial guide groove of the inner cage (1) of the outer teeth to ensure that the left half The shaft center wheel (2) and the right half shaft dual-phase internal cam (6) can realize differential speed without breaking away from the transmission. Moreover, due to the action of the moment produced by the needle roller block (5) on the left half-shaft center wheel (2) and the right half-shaft dual-phase internal cam (6), the specific speed can be obtained on the driving wheel with a slow speed. Faster drive wheels have more torque.

In order to illustrate the differential speed characteristics of the automobile differential of the present invention, assuming that the rotational speeds of the left and right wheels at the rear of the automobile are respectively n ₂ and n ₆ , and the rotational speed of the inner cage (1) of the outer teeth is n ₁ , then it can be obtained from Fig. 9:

$\frac{{\mathrm{<span\; class="notranslate">\; no</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; no</span>}}_{\mathrm{<span\; class="notranslate">\; 6</span>}}}{{\mathrm{<span\; class="notranslate">\; no</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; no</span>}}_{\mathrm{<span\; class="notranslate">\; 6</span>}}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; Z</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; Z</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$

In the formula, Z ₁ - the number of needle roller blocks; Z ₂ - the number of teeth of the center wheel of the left half shaft.

If the car is going to turn left, the axes of the two front wheels of the car and the axes of the two rear wheels of the car meet at point P under the action of the steering mechanism (Fig. 10), and the whole car can be regarded as turning around point P . Under the condition that the wheels and the ground do not slip, the rotational speed of the two rear wheels should be proportional to the radius of the curve, as can be obtained from Figure 10:

$\frac{{\mathrm{<span\; class="notranslate">\; no</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; no</span>}}_{\mathrm{<span\; class="notranslate">\; 6</span>}}}<span\; class="notranslate">\; =</span>\frac{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; r</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; L</span>}<span\; class="notranslate">\; )</span>}{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; r</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; L</span>}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>$

In the formula, r-the average radius of the curve; L-half of the rear track.

Simultaneously solve formula (1) and formula (2), get:

${\mathrm{<span\; class="notranslate">\; no</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span>\frac{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; r</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; L</span>}<span\; class="notranslate">\; )</span>{\mathrm{<span\; class="notranslate">\; Z</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}{{\mathrm{<span\; class="notranslate">\; Z</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}\mathrm{<span\; class="notranslate">\; r</span>}<span\; class="notranslate">\; +</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; Z</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 2</span>}{\mathrm{<span\; class="notranslate">\; Z</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span>\mathrm{<span\; class="notranslate">\; L</span>}}{\mathrm{<span\; class="notranslate">\; no</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; )</span>$

${\mathrm{<span\; class="notranslate">\; no</span>}}_{\mathrm{<span\; class="notranslate">\; 6</span>}}<span\; class="notranslate">\; =</span>\frac{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; r</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; L</span>}<span\; class="notranslate">\; )</span>{\mathrm{<span\; class="notranslate">\; Z</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}{{\mathrm{<span\; class="notranslate">\; Z</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}\mathrm{<span\; class="notranslate">\; r</span>}<span\; class="notranslate">\; +</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; Z</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 2</span>}{\mathrm{<span\; class="notranslate">\; Z</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span>\mathrm{<span\; class="notranslate">\; L</span>}}{\mathrm{<span\; class="notranslate">\; no</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 4</span>}<span\; class="notranslate">\; )</span>$

Under certain vehicle parameters and driving conditions, n ₁ , Z ₁ , Z ₂ , and L are all known. Therefore, n ₂ and n ₆ only vary with the turning radius r. Therefore, the differential device of the present invention has a differential function, and a vehicle equipped with the differential device can pass through curves with any radius.

The present invention can be widely applied to all wheeled vehicles that need a differential, such as automobiles, engineering vehicles and the like.

Claims (3)

1. interior Double-phase shock wave needle roller rolls Subblock-wise automobile differential, mainly by retainer in external tooth (1), left half axle centre wheel (2), circleTaper roller bearing (3), right half shell (4), needle roller roller piece (5), right axle shaft two-phase cam ring (6), deep groove ball bearing (7),Screw (8), deep groove ball bearing (9), needle roller (10), sleeve pad (12), deep groove ball bearing (13) composition, its featureBe: abandoned the planetary gear system of orthodox car differential mechanism, replaced " retainer-needle roller roller piece-left side half in external toothAxle centre wheel-right axle shaft two-phase cam ring " system, this system mainly comprise retainer (1) in external tooth, needle roller roller piece (5),Left half axle centre wheel (2), right axle shaft two-phase cam ring (6), realize differential with this system, forms differential mechanism; In external tooth, keepThe outside of frame (1) is that driven spur bevel gear, the inside of main reducing gear is tube-in-tube structure, along circumferentially having of this tube-in-tube structureZ₁Individual radially guide groove is equipped with needle roller roller piece (5) in this guide groove, thus claim that this tube-in-tube structure is retainer, so protect in external toothHolding frame (1) is a bevel gear of main reducing gear, is again a member in differential mechanism, retainer (1) in external toothMain reducing gear and differential mechanism are organically integrated, and in external tooth, retainer (1) is fixing by screw (8) with right half shell (4)Connect into an entirety and be supported in frame by a pair of taper roll bearing (3); Above-mentioned needle roller roller piece (5) is by backbone block(16), sell (17), needle roller (18), needle roller sleeve (19) composition, the two ends of pin (17) and backbone block (16) both sidesBetween hole, be tight fit, the needle roller sleeve (19) that is arranged on backbone block (16) two ends is supported by pin (17) and passes through needle roller(18) with backbone block (16) composition rolling connecting relation; The radially guide groove inwall of the tube-in-tube structure of retainer in external tooth (1)On radially have to fill the groove of needle roller (10), some needle rollers (10) are housed in this groove, needle roller roller piece (5)Be contained in the radially guide groove of the tube-in-tube structure of retainer (1) in external tooth and can in this guide groove, move radially needle roller roller piece (5)Backbone block (16) by the radially guide groove composition of retainer (1) in the some needle rollers (10) in guide groove and the external tooth connection that rollsConnect relation, the needle roller in guide groove (10) makes contacting by sliding between retainer (1) in needle roller roller piece (5) and external toothFriction becomes rolling friction; Left half axle centre wheel (2) is heterogeneous external cam, and this heterogeneous external cam has multiple evagination partsExternal cam, the number of its evagination part is called the number of teeth of left half axle centre wheel (2), is designated as Z₂, the profile song of this heterogeneous external camLine is that needle roller roller piece (5) rotates with retainer in external tooth (1) on the one hand, on the other hand retainer (1) in external tooth againIn the process radially moving in guide groove, the envelope of its inner needle roller sleeve (19) a series of positions of living in, left half axle centre wheel(2) be embedded in the tube-in-tube structure of retainer (1) in external tooth, the left end of left half axle centre wheel (2) is left half axle, left half axleCentre wheel (2) is connected with left side rear wheel (14) by left half axle, and the right-hand member of left half axle centre wheel (2) is by zanjon ball journalHold within (9) be supported on right axle shaft two-phase cam ring (6), left end is supported in external tooth and is kept by deep groove ball bearing (13)Within frame (1); Right axle shaft two-phase cam ring (6) is two-phase cam ring, and the inside of this two-phase cam ring is two off-centre operations or ellipseCircular two-phase cam ring, himself quality complete equipilibrium, in external tooth, the tube-in-tube structure of retainer (1) is embedded in right axle shaft two-phaseWithin cam (6), right axle shaft two-phase cam ring (6) is supported in right half shell (4) by a pair of deep groove ball bearing (7), the right sideThe right-hand member of semiaxis two-phase cam ring (6) is right axle shaft, and right axle shaft two-phase cam ring (6) is by right axle shaft and the right rear wheel (15)Be connected together; The needle roller sleeve (19) at needle roller roller piece (5) two ends respectively with the convex of right axle shaft two-phase cam ring (6)The external cam profile of wheel profile and left half axle centre wheel (2) the pure rolling higher pair of each composition that is meshed; Left half axle centre wheel (2)Tooth number Z₂Number Z with needle roller roller piece (5)₁Differ is 2.

2. interior Double-phase shock wave needle roller according to claim 1 rolls Subblock-wise automobile differential, it is characterized in that: needle roller roller piece withBetween the interior profile of the external cam profile of left half axle centre wheel, the interior retainer of external tooth and right axle shaft two-phase cam ring, be multiple tooth engagement,Can have at most 50% needle roller roller piece to participate in joggleword, registration is high simultaneously, and bearing capacity is high, can realize high-power,High pulling torque differential gearing.

3. interior Double-phase shock wave needle roller according to claim 1 rolls Subblock-wise automobile differential, it is characterized in that: needle roller roller piece withIn external tooth, between retainer, right axle shaft two-phase cam ring, left half axle centre wheel, be pure rolling friction and connect, therefore differential of the present inventionThe transmission efficiency of device is high.