阅读说明：本技术 一种高强度销齿轮传动组 (High-strength pin gear transmission set ) 是由 王以南 于 2021-07-29 设计创作，主要内容包括：本发明涉及传动技术领域。目的在于提供一种高强度销齿轮传动组,包括安装在轮轴上的传动齿轮,所述传动齿轮与销齿条相啮合；所述传动齿轮为组合式齿轮,传动齿轮包括轮圈、轮盖和安装在轮圈上的轮齿；所述轮圈呈圆环形,轮圈的周面上均匀设置有若干沿轮圈径向延伸的齿孔,所述齿孔由内至外逐渐变小；所述轮齿呈保龄球瓶状,轮齿的中段与齿孔相配合,并由内至外穿设在齿孔内；所述轮盖设置有两个,轮盖的外径大于轮圈的内径,两个轮盖从轮圈的两面双向扣合,并将轮齿朝外抵紧在齿孔内。本发明结构紧凑、强度高,且能够在某一轮齿损坏过磨耗过大的情况下独立对该轮齿进行更换,无需更换整个传动齿轮,极大的降低了维护成本。(The invention relates to the technical field of transmission. The high-strength pin gear transmission set comprises a transmission gear arranged on a wheel shaft, wherein the transmission gear is meshed with a pin rack; the transmission gear is a combined gear and comprises a rim, a wheel cover and gear teeth arranged on the rim; the wheel rim is annular, a plurality of tooth holes extending along the radial direction of the wheel rim are uniformly arranged on the circumferential surface of the wheel rim, and the tooth holes are gradually reduced from inside to outside; the middle section of the gear teeth is matched with the tooth holes and penetrates through the tooth holes from inside to outside; the wheel covers are two, the outer diameter of each wheel cover is larger than the inner diameter of each wheel rim, the two wheel covers are buckled from two sides of each wheel rim in a two-way mode, and the wheel teeth are outwards abutted to the tooth holes. The invention has compact structure and high strength, can independently replace a gear tooth under the condition of excessive damage, excessive abrasion and consumption of the gear tooth, does not need to replace the whole transmission gear, and greatly reduces the maintenance cost.)

1. A high-strength pin gear transmission set comprises a transmission gear (1) arranged on a wheel shaft (0), wherein the transmission gear (1) is meshed with a pin rack (2);

the method is characterized in that: the transmission gear (1) is a combined gear, and the transmission gear (1) comprises a rim (3), a wheel cover (4) and gear teeth (5) arranged on the rim (3); the wheel rim (3) is annular, a plurality of tooth holes (6) extending along the radial direction of the wheel rim (3) are uniformly formed in the circumferential surface of the wheel rim (3), and the tooth holes (6) are gradually reduced from inside to outside; the gear teeth (5) are in a bowling pin shape, the middle sections of the gear teeth (5) are matched with the tooth holes (6) and penetrate through the tooth holes (6) from inside to outside; the two wheel covers (4) are arranged, the outer diameter of each wheel cover (4) is larger than the inner diameter of each wheel rim (3), the two wheel covers (4) are buckled from two sides of each wheel rim (3) in a two-way mode, and the wheel teeth (5) are abutted outwards in the tooth holes (6); the two wheel covers (4) are mutually locked through a middle bolt (7), and a shaft hole (8) for mounting the wheel shaft (0) is formed in the center of each wheel cover (4).

2. The high strength pin gear drive set of claim 1, wherein: two surfaces of the inner end of each gear tooth (5) facing the wheel cover (4) are slope surfaces, a plurality of tooth sockets (9) are arranged at positions opposite to the inner end of each gear tooth (5) on the opposite surfaces of the two wheel covers (4) and corresponding to the number of the gear teeth (5), and the groove surfaces of the tooth sockets (9) are inclined surfaces matched with the slope surfaces of the gear teeth (5); the inner ends of the gear teeth (5) are clamped in the tooth grooves (9) corresponding to the two wheel covers (4), and the gear teeth (5) are tightly propped in the tooth holes (6) through the lifting tops of the upper inclined surfaces of the wheel covers (4) to the upper inclined surfaces of the gear teeth (5).

3. The high strength pin gear drive set of claim 2, wherein: the wheel cover (4) and the position of the opposite side of the wheel rim (3) close to the edge are annularly provided with a circle of first limiting teeth (10), the position of the wheel rim (3) opposite to the first limiting teeth (10) is provided with a circle of second limiting teeth (11), and the first limiting teeth (10) are meshed with the second limiting teeth (11).

4. The high strength pin gear drive set of claim 3, wherein: the wheel cover is characterized in that an annular first limiting shoulder (12) is arranged in the middle of one face, opposite to the wheel rim (3), of the wheel cover (4), a second limiting shoulder (13) matched with the first limiting shoulder (12) is arranged in the middle of the wheel rim (3), and the first limiting shoulder (12) and the second limiting shoulder (13) are buckled with each other.

5. The high strength pin gear drive set of claim 4, wherein: the number of the middle bolts (7) is at least four, and the four middle bolts (7) are uniformly distributed in an annular shape around the shaft hole (8).

6. The high strength pin gear drive set of claim 5, wherein: the wheel cover (4) is locked between the positions close to the edges through the side bolts (14), and the side bolts (14) penetrate through the wheel cover (4), the rim (3) and the gear teeth (5).

7. The high strength pin gear drive set of claim 6, wherein: a protruding shaft key (15) is arranged in a shaft hole (8) of the wheel cover (4), and the shaft key (15) extends along the length direction of the shaft hole (8) and is matched with a shaft key (15) groove on the wheel shaft (0).

8. The high strength pin gear drive set of claim 7, wherein: two shaft keys (15) are symmetrically arranged in the shaft hole (8).

9. The high strength pin gear drive set of claim 8, wherein: self-lubricating bearings are arranged on the wheel shafts (0) on two sides of the transmission gear (1), each self-lubricating bearing comprises an outer ring connected with the bearing seat, an inner ring connected with the wheel shaft (0), and a rotor (21) arranged between the inner ring and the outer ring and used for enabling the inner ring and the outer ring to form rotating fit;

the inner ring comprises a sleeve (22) which is sleeved on the wheel axle (0) and fixedly connected with the wheel axle (0), two brackets (23) with L-shaped cross sections are arranged on the outer surface of the sleeve (22), and the openings of the brackets (23) are opposite;

the outer ring comprises a bearing cylinder (24) sleeved outside a bracket (23) of the inner ring, a support cylinder (25) is arranged inside the bearing cylinder (24), and the support cylinder (25) is fixedly connected with the bearing cylinder (24) through two annular plates (26); two ends of the support cylinder (25) are inserted into the support grooves (23), a layer of rotor (21) is arranged between the outer surfaces of the two ends of the support cylinder (25) and the inner side walls of the support grooves (23), and another layer of rotor (21) is arranged between the inner surfaces of the two ends of the support cylinder (25) and the outer surface of the sleeve (22);

a material storage chamber is arranged in an annular cavity defined by the receiving cylinder (24) of the outer ring, the support cylinder (25) and the two annular plates (26), the material storage chamber is communicated with the inner side wall of the support cylinder (25) through a lubricating hole (27), and a control valve is arranged in the lubricating hole (27); the outside of storage compartment still is provided with feed supplement mouth (28).

10. The high strength pin gear drive set of claim 9, wherein: the inner surfaces of the two ends of the bearing cylinder (24) are provided with spiral pump teeth (29) with pumping directions from the inside of the bearing cylinder (24) to the two ends.

Technical Field

The invention relates to the technical field of transmission, in particular to a high-strength pin gear transmission set.

Background

The pin gear transmission device is one of gear transmission devices, and compared with a traditional gear which directly utilizes a key tooth meshing mode, the pin gear transmission device has the advantages that meshing between two transmission parts adopts a tooth pin meshing mode, and is mainly applied to low-speed and heavy mechanical transmission, more dust, poor lubricating conditions and other severe environments. Compared with the traditional gear transmission device, the novel gear transmission device has the characteristics of easiness in processing, low manufacturing cost, convenience in disassembly and maintenance and the like, wide surface friction between key teeth can be buffered through the rotation of the pin column, and the integral wear resistance of the device can be effectively improved. According to the meshing form among the parts, the device mainly comprises a gear 1 and a pin rack meshed with the gear; 2. the gear is internally tangent and meshed with the pin gear; 3. the three forms of gear and pin gear external-cutting engagement are mainly explained and illustrated in detail in the first form of the invention due to certain commonality.

The defects of the prior device are as follows: 1. the pin rack and the gear are mainly suitable for large-scale and low-speed transmission and generally have larger volume, and the pin rack adopts detachable pins for transmission, so that one or more pins can be independently replaced when damaged; however, the gear is still integrally machined, and once one tooth is damaged, the whole gear needs to be replaced, so that the use cost is greatly increased; 2. compared with the traditional transmission device, the damage friction force between the key teeth of the gear and the pins of the pin rack is reduced, but the damage friction force still exists, and if the key teeth of the gear can be further improved on the basis, the friction force between the pins and the key teeth can be better relieved, and the overall wear resistance is improved. 3. The wheel shaft of the gear is arranged on the bearing seat through a traditional bearing, but the lubrication condition is severe, so that a worker needs to repeatedly overhaul the gear to supplement lubrication consumables; if can realize the self-lubricating of shaft through a simple and easy design, reduction staff's that will be can be very big intensity of labour reduces the whole risk of shutting down of equipment.

Disclosure of Invention

The invention aims to provide a combined high-strength pin gear transmission set convenient to maintain.

In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: a high-strength pin gear transmission set comprises a transmission gear arranged on a wheel shaft, wherein the transmission gear is meshed with a pin rack;

the transmission gear is a combined gear and comprises a rim, a wheel cover and gear teeth arranged on the rim; the wheel rim is annular, a plurality of tooth holes extending along the radial direction of the wheel rim are uniformly arranged on the circumferential surface of the wheel rim, and the tooth holes are gradually reduced from inside to outside; the middle section of the gear teeth is matched with the tooth holes and penetrates through the tooth holes from inside to outside; the two wheel covers are arranged, the outer diameter of each wheel cover is larger than the inner diameter of each wheel rim, the two wheel covers are buckled from two sides of each wheel rim in a two-way mode, and the wheel teeth are tightly pressed in the tooth holes outwards; the two wheel covers are mutually locked through a middle bolt, and a shaft hole for mounting a wheel shaft is formed in the center of each wheel cover.

Preferably, two surfaces of the inner ends of the gear teeth facing the wheel covers are slope surfaces, a plurality of tooth sockets are arranged at positions opposite to the inner ends of the gear teeth on the opposite surfaces of the two wheel covers and corresponding to the number of the gear teeth, and the groove surfaces of the tooth sockets are inclined surfaces matched with the slope surfaces of the gear teeth; the inner ends of the gear teeth are clamped in the tooth grooves corresponding to the two wheel covers, and the gear teeth are tightly propped in the tooth holes through the lifting tops of the upper inclined surfaces of the wheel covers to the upper inclined surfaces of the gear teeth.

Preferably, the position of the side, close to the edge, opposite to the rim of the wheel cover is annularly provided with a circle of first limiting teeth, the position, opposite to the first limiting teeth, of the rim of the wheel is provided with a circle of second limiting teeth, and the first limiting teeth and the second limiting teeth are meshed with each other.

Preferably, the middle part of the opposite surface of the wheel cover and the wheel rim is provided with an annular first limiting shoulder, the middle part of the wheel rim is provided with a second limiting shoulder matched with the first limiting shoulder, and the first limiting shoulder and the second limiting shoulder are buckled with each other.

Preferably, the number of the middle bolts is at least four, and the four middle bolts are uniformly distributed in an annular shape around the shaft hole.

Preferably, the wheel cover is locked between the positions close to the edges through side bolts, and the side bolts penetrate through the wheel cover, the wheel rim and the gear teeth.

Preferably, a protruding shaft key is arranged in a shaft hole of the wheel cover, extends along the length direction of the shaft hole and is matched with a shaft key groove on the wheel shaft.

Preferably, two shaft keys are symmetrically arranged in the shaft hole.

Preferably, the wheel shafts on two sides of the transmission gear are provided with self-lubricating bearings, each self-lubricating bearing comprises an outer ring connected with the bearing seat, an inner ring connected with the wheel shaft and a rotor arranged between the inner ring and the outer ring and used for enabling the inner ring and the outer ring to form rotating fit;

the inner ring comprises a sleeve which is sleeved on the wheel shaft and fixedly connected with the wheel shaft, two supporting grooves with L-shaped cross sections are arranged on the outer surface of the sleeve, and openings of the supporting grooves are opposite;

the outer ring comprises a bearing cylinder sleeved outside a support groove of the inner ring, a support cylinder is arranged inside the bearing cylinder, and the support cylinder and the bearing cylinder are fixedly connected through two annular plates; two ends of the supporting cylinder are inserted into the supporting grooves, a layer of rotor is arranged between the outer surfaces of the two ends of the supporting cylinder and the inner side walls of the supporting grooves, and another layer of rotor is arranged between the inner surfaces of the two ends of the supporting cylinder and the outer surface of the sleeve;

a material storage chamber is arranged in an annular cavity defined by the receiving cylinder of the outer ring, the support cylinder and the two annular plates, the material storage chamber is communicated with the inner side wall of the support cylinder through a lubricating hole, and a control valve is arranged in the lubricating hole; the outside of storage compartment still is provided with the feed supplement mouth.

Preferably, the inner surfaces of the two ends of the bearing cylinder are provided with spiral pump teeth, and the pumping direction of the spiral pump teeth is from the inside of the bearing cylinder to the two ends.

The beneficial effects of the invention are concentrated and expressed as follows: compact structure, intensity are high, and can damage under the too big condition of wearing and tearing and independently change this teeth of a cogwheel at certain teeth of a cogwheel, need not to change whole drive gear, very big reduction the maintenance cost. Specifically, the transmission gear mainly comprises a plurality of parts such as a rim, gear teeth and a wheel cover, wherein the gear teeth are independently arranged on the rim and are fixed by circumferential limit of a tooth hole and radial jacking of the wheel cover. On the one hand, the double positioning mode enables the installation stability of the gear teeth to be excellent, and meanwhile, the uniform stress on the gear teeth is transferred from the middle part to the rim and transferred from the root part (namely, the inner end) to the wheel cover, so that stress concentration is avoided, and the service life of the gear teeth is greatly prolonged.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view showing an internal structure of a transmission gear;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a schematic view of the inner surface of the wheel cover;

FIG. 5 is a schematic view of the outer surface of the wheel cover;

FIG. 6 is a schematic structural view of the outer surface of the rim;

FIG. 7 is a schematic view of the inner structure of the rim;

FIG. 8 is a schematic illustration of the structure shown in FIG. 7 after installation of the gear teeth;

FIG. 9 is a schematic structural view of a gear tooth;

FIG. 10 is a left side view of FIG. 9;

FIG. 11 is a schematic diagram of the structure of a preferred embodiment of the roll pin;

FIG. 12 is a schematic view of the structure shown in FIG. 2 with the axle installed;

fig. 13 is an enlarged view of a portion B in fig. 12.

Detailed Description

As shown in fig. 1 to 13, a high-strength pin gear transmission set, mainly used for transmission of large-sized heavy machinery with relatively low requirement on transmission precision, mainly comprises three major components: firstly, a transmission gear; secondly, mounting a wheel shaft of the transmission gear; thirdly, a pin tooth component used for being combined with the transmission gear; the pin gear part is a transmission part with a gear key formed by a rotating pin, a pin and the like, and the most common forms of the pin gear part comprise a pin rack, a pin gear ring and the like, and the pin gear ring can form internal cutting transmission, external cutting transmission and the like with the transmission gear. In the present invention, since the main improvement point is focused on the improvement of the installation manner of the transmission gear 1 and the wheel axle 0, for this reason, the present invention is mainly explained by the combination of the transmission gear 1 and the pin rack 0.

As shown in fig. 1, the present invention includes a pinion 1 mounted on a wheel axle 0, the pinion 1 being engaged with a rack and pinion 2. The characteristics of the invention different from the traditional pin gear transmission device are reflected in three aspects: firstly, a combined transmission gear 1 is adopted; secondly, rolling pin type gear teeth are adopted; thirdly, a self-lubricating bearing is adopted to support the installation of the wheel axle 0; the three characteristics can be applied independently, or can be combined in pairs or applied in combination. The present invention will be described in detail with reference to the following embodiments and accompanying drawings.

As shown in fig. 2, the transmission gear 1 of the present invention is a combined gear, i.e., the transmission gear 1 is not a conventional integrated structure but a combined structure as the name implies. The transmission gear 1 includes a rim 3, a wheel cover 4, and gear teeth 5 mounted on the rim 3. Referring to fig. 2, 7 and 8, the rim 3 is circular, a plurality of tooth holes 6 extending along the radial direction of the rim 3 are uniformly formed on the circumferential surface of the rim 3, and the tooth holes 6 are gradually reduced from inside to outside. The teeth 5 are in the shape of bowling pins, the middle section of the teeth 5 is matched with the tooth holes 6 and penetrates through the tooth holes 6 from inside to outside.

The number of teeth 5 is small, and the number of teeth 5 can be increased or decreased in practical application to avoid confusion of illustration. As shown in fig. 2, the wheel covers 4 are provided in two numbers, the outer diameter of the wheel cover 4 is larger than the inner diameter of the rim 3, and the two wheel covers 4 are buckled from two sides of the rim 3 in a two-way mode and press the gear teeth 5 outwards in the gear holes 6. That is to say, the wheel cover 4 plays the effect of compressing tightly the rim 3 after the lock on the one hand, and on the other hand plays the effect of propping up the inner of the teeth of a cogwheel 5 outward again for the teeth of a cogwheel 5 chucking prevents the drunkenness in the perforation 6. The two wheel covers 4 are locked with each other through a middle bolt 7, and a shaft hole 8 for mounting the wheel shaft 0 is formed in the center of each wheel cover 4. Generally, the number of the middle bolts 7 is at least four, and the four middle bolts 7 are uniformly distributed around the shaft hole 8 in an annular shape.

The transmission gear 1 mainly comprises a plurality of parts such as a rim 3, gear teeth 5 and a wheel cover 4, wherein the gear teeth 5 are independently arranged on the rim 3 and are fixed by circumferential limit of a tooth hole 6 and radial jacking of the wheel cover 4. On the one hand, the double positioning mode enables the installation stability of the gear teeth 5 to be excellent, and simultaneously, the uniform stress on the gear teeth 5 is transferred from the middle part to the rim 3 and from the root part (namely, the inner end) to the wheel cover 4, so that stress concentration is avoided, and the service life of the gear teeth 5 is greatly prolonged. Each gear tooth 5 can be independently replaced without replacing the transmission gear 1 as a whole.

In order to enable the wheel cover 4 to have an outward jacking function on the inner end of the gear teeth 5, a large number of specific structures can be adopted, for example, oblique pins can be arranged on the wheel cover 4, and outward jacking can be realized by adjusting the extending length of the pins, but in this way, the number of pins needed is large, and adjustment is inconvenient. Therefore, in order to realize the synchronous external pushing of each gear tooth 5, the present invention may be further preferably implemented, as shown in fig. 3 and 4, two surfaces of the inner end of each gear tooth 5 facing the wheel cap 4 are slope surfaces, a position of one surface of each wheel cap 4 opposite to the inner end of each gear tooth 5, that is, a middle ring part of each wheel cap 4, is provided with a plurality of tooth sockets 9 corresponding to the number of the gear teeth 5, and a groove surface of each tooth socket 9 is an inclined surface matching with the slope surface of each gear tooth 5. The inner ends of the gear teeth 5 are clamped in the tooth grooves 9 corresponding to the two wheel covers 4, and the gear teeth 5 are tightly propped against the upper slope surfaces of the gear teeth 5 in the tooth holes 6 through the lifting tops of the upper slope surfaces of the wheel covers 4. When the wheel is used, the wheel teeth 5 are installed on the rim 3, then the two wheel covers 4 are buckled with each other, each tooth groove 9 is correspondingly clamped at the lower end of the wheel teeth 5, and the wheel covers 4 tightly clamp and push the wheel teeth 5 outwards along with the fastening of the middle bolts 7.

On the basis, in order to further improve the bonding strength of the wheel cover 4 and the rim 3 and prevent the relative rotation of the wheel cover 4 and the rim 3, as shown in fig. 4 and 6, a circle of first limiting teeth 10 is annularly arranged at the position, close to the edge, of the opposite surface of the wheel cover 4 and the rim 3, a circle of second limiting teeth 11 is arranged at the position, opposite to the first limiting teeth 10, of the rim 3, and the first limiting teeth 10 and the second limiting teeth 11 are meshed with each other. By means of the meshing of the first limiting teeth 10 and the second limiting teeth 11, the wheel cover 4 and the wheel rim 3 can be circumferentially limited, the rotation of the wheel cover and the wheel rim can be effectively prevented after locking, and the shearing force received by the middle bolt 7 is effectively reduced. In addition, in order to prevent the wheel cover 4 and the rim 3 from moving in the radial direction, an annular first limit shoulder 12 is arranged in the middle of one surface of the wheel cover 4 opposite to the rim 3, a second limit shoulder 13 matched with the first limit shoulder 12 is arranged in the middle of the rim 3, and the first limit shoulder 12 and the second limit shoulder 13 are buckled with each other.

Of course, in some situations where the torque requirement is extremely large, the structure of the transmission gear 1 of the present invention can be further improved, for example: the positions of the wheel cover 4 close to the edges are locked through side bolts 14, and the side bolts 14 penetrate through the wheel cover 4, the wheel rim 3 and the gear teeth 5. The locking degree of the wheel cover 4 is further improved through a plurality of side bolts 14, the stress between the first limiting teeth 10 and the second limiting teeth 11 and the stress in the middle section of the middle bolt 7 are shared, and the overall structural strength is improved.

As for the connection between the transmission gear 1 and the axle 0, there are many connection manners, which can adopt various forms such as key connection, bolt connection, flange connection, etc., and here, the key connection is taken as an example, as shown in fig. 3-5, a protruding axle key 15 is arranged in the axle hole 8 of the wheel cover 4, and the axle key 15 extends along the length direction of the axle hole 8 and is matched with the axle key 15 groove on the axle 0. Two or more shaft keys 15 are symmetrically arranged in the shaft hole 8.

In order to further relieve the friction between the gear teeth 5 and the pin and rack 2, the gear teeth 5 are improved from the second direction, specifically, as shown in fig. 9-11, a vertical groove 16 is arranged at the outer end of the gear teeth 5 of the transmission gear 1, a plurality of central rods 17 connected with the front and rear side walls of the groove 16 are fixedly arranged at the edge of the groove 16, two ends of the central rods 17 are welded with the side walls of the groove 16, or two ends of the central rods 17 are fixedly arranged on the side walls of the groove 16 through end caps, or other connecting structures which are convenient to process and install and meet the strength. The central rod 17 is provided with a roll pin 18. The center of the rolling pin 18 is provided with a rod hole matched with the central rod 17, and the rolling pin 18 is sleeved outside the central rod 17 through the rod hole and forms rotating fit with the central rod 17. In order to reduce friction between the end of the roll pin 18 and the side wall of the recess 16 during rotation of the roll pin 18, both ends of the roll pin 18 may be formed in a hemispherical shape as shown in fig. 11.

According to the invention, the outer end of the gear tooth 5 of the transmission gear 1 is provided with the rolling pin 18, the peripheral surface of the rolling pin 18 is used as a contact surface contacted with the pin rack 2, and when transmission is carried out, the rolling pin 18 can rotate along with the transmission requirement, so that a part of friction force is converted into rotation. Compared with the traditional mode of taking the edge line of the gear teeth 5 as a contact surface, the whole stress condition is improved, and the device is particularly suitable for low-speed heavy machinery which has low requirement on transmission precision and large whole volume. On the basis, in order to reinforce the groove 16 and reduce the deformation risk thereof, the side walls of the upper part and the lower part of the groove 16 are connected through a group of reinforcing components. The simplest reinforcing component is a reinforcing connecting rod 19, as shown in fig. 9 and 10, the reinforcing component comprises three reinforcing connecting rods 19, the three reinforcing connecting rods 19 are arranged in a delta shape, and two ends of the three reinforcing connecting rods are fixedly connected with two side walls of the groove 16 respectively. Furthermore, triangular reinforcing rings 20 are sleeved outside the three reinforcing connecting rods 19 of the reinforcing component, and the reinforcing rings 20 are welded with the reinforcing connecting rods 19. The three reinforcing connecting rods 19 are made to be more integral through the reinforcing rings 20, and stress transmission and stress dispersion are facilitated.

As for the third major improvement of the present invention, namely, the way of mounting the wheel axle 0 on the bearing, as shown in fig. 12 and 13, self-lubricating bearings are arranged on the wheel axle 0 on both sides of the transmission gear 1, and each self-lubricating bearing comprises an outer ring for connecting with the bearing seat, an inner ring for connecting with the wheel axle 0, and a rotor 21 arranged between the inner ring and the outer ring for enabling the inner ring and the outer ring to form a rotating fit. Two layers of rotors 21 are arranged between the outer ring and the inner ring.

As shown in fig. 13, the inner ring includes a sleeve 22 that is sleeved on the wheel axle 0 and is fixedly connected to the wheel axle 0, and the sleeve 22 is generally fixedly connected to the wheel axle 0 directly through a bolt, and may also be sleeved in a manner of key connection or interference fit. The outer surface of the sleeve 22 is provided with two brackets 23 with L-shaped cross sections, wherein the L-shaped cross section means that the partial cross section of each bracket 23 is L-shaped and is essentially annular, and the openings of the two brackets 23 are opposite. The sleeve 22 and bracket 23 may be welded as a unitary structure or directly forged to this unitary shape.

As shown in fig. 13, the outer ring includes a receiving cylinder 24 sleeved outside the bracket 23 of the inner ring, a supporting cylinder 25 is disposed inside the receiving cylinder 24, and the supporting cylinder 25 and the receiving cylinder 24 are fixedly connected by two annular plates 26. Two ends of the supporting cylinder 25 are inserted into the supporting grooves 23, a layer of rotor 21 is arranged between the outer surfaces of the two ends of the supporting cylinder 25 and the inner side walls of the supporting grooves 23, and another layer of rotor 21 is arranged between the inner surfaces of the two ends of the supporting cylinder 25 and the outer surface of the sleeve 22. The receiving cylinder 24, the supporting cylinder 25 and the ring plate 26 are welded into an integral structure, and can also be forged into the integral shape. The rotor 21 of the present invention may be a cylindrical rotor 21, a spherical rotor, etc., and here, taking the cylindrical rotor 21 as an example, two sets of the rotor 21 located at the outer layer are arranged at two ends of the support cylinder 25, and four sets of the rotor 21 located at the inner layer are uniformly arranged along the length direction of the cylinder. In order to facilitate the positioning and rotation of the rotor 21, the inner and outer surfaces of the supporting cylinder 25, the inner side wall of the supporting groove 23 and the outer side wall of the sleeve 22 opposite to the rotor 21 are provided with mounting grooves. Due to the fact that the inner layer of the rotor 21 and the outer layer of the rotor 21 are arranged, the sliding performance between the inner ring and the outer ring can be improved by the two layers of the rotors 21.

In order to form automatic lubrication, a material storage chamber is arranged in an annular cavity enclosed by the receiving cylinder 24, the supporting cylinder 25 and the two annular plates 26 of the outer ring, and the material storage chamber is generally positioned at the upper part of the self-lubricating bearing. The storage chamber is communicated with the inner side wall of the supporting cylinder 25 through a lubricating hole 27, a control valve is arranged in the lubricating hole 27, and a material supplementing port 28 is further arranged on the outer side of the storage chamber.

In the use process of the invention, by opening the control valve at regular time, the lubricating substance in the storage chamber can enter between the support cylinder 25 and the sleeve 22 from the lubricating hole 27 to lubricate the inner rotor 21, and then is thrown out between the support cylinder 25 and the side wall of the support groove 23 under the centrifugal force to lubricate the outer rotor, so that the self-lubricating device has the self-lubricating function, can improve the integral working efficiency and reduce the difficulty of maintenance. In addition, in order to further improve the fluidity of the lubricating material, so as to improve the lubricating effect. The inner surfaces of the two ends of the receiving cylinder 24 are provided with spiral pump teeth 29 with the pumping direction from the inside of the receiving cylinder 24 to the two ends. When the bearing device is used, along with the rotation of the inner ring, a pumping force is generated between the outer side wall of the bracket 23 and the inner surface of the bearing cylinder 24 under the action of the spiral pump teeth 29, so that lubricating materials are sucked to a certain extent, the movement of the lubricating materials is more active, and the lubricating dead angle of the lubricating materials is reduced. Meanwhile, the storage chamber is filled with lubricating oil, and the lubricating oil has high specific heat capacity, so that the integral cooling effect of the self-lubricating bearing can be realized, the phenomenon of overhigh temperature of the self-lubricating bearing is avoided, and the deformation risk is reduced.