Rotational joint assembly, lifting mechanism and display equipment

Abstract

The utility model discloses a rotating joint assembly, a lifting mechanism and display equipment, the rotating joint assembly comprises two movable parts, a connecting part, a pin shaft and a bearing, the opposite ends of the two movable parts extend to form rotating parts, the rotating parts are provided with outer gear teeth, and the two movable parts can synchronously rotate through meshing of the outer gear teeth; a mounting groove is formed in the connecting piece, and the rotating parts of the two movable pieces are arranged in the mounting groove and are hinged to the connecting piece through pin shafts respectively; the bearing is located in the mounting groove and arranged between the pin shaft and the movable part, the bearing is provided with an inner ring and an outer ring, the outer ring is in interference fit with the movable part, the end face of the inner ring abuts against the connecting part, and the end face of the outer ring abuts against the movable part. The stability of the joint structure in the movement process can be effectively guaranteed, and then the control precision is improved.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to a rotating joint assembly, a lifting mechanism and a display device. Background Art

[0002] With the rapid development of screen display technology, various display devices can be seen everywhere in life, such as common LCD TVs and LCD monitors. However, these display devices take up a lot of space and are not easy to carry because of the large size of the screen itself.

[0003] In order to make the display device suitable for more occasions, such as convenient to carry, and not wanting to be blocked by the display screen during face-to-face communication, the display device needs to have a storage function. In the related art, the lifting structure in the display device with a storage function cannot well support the lifting of the flexible screen module and has poor stability. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a rotating joint assembly, a lifting mechanism and a display device, which can effectively ensure the stability of the joint assembly during the rotation process, thereby improving the stability of the adjustment of the lifting mechanism during the lifting process, so that the lifting mechanism can stably support the lifting of the flexible screen module.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] On the one hand, a rotating joint assembly is provided, comprising: two movable parts, a connecting part, a pin shaft and a bearing, wherein the opposite ends of the two movable parts extend to form a rotating part respectively, each of the rotating parts is provided with an external gear tooth, and the two movable parts can rotate synchronously through the meshing of the external gear teeth; the connecting part forms a mounting groove, the rotating parts of the two movable parts are arranged in the mounting groove, and are respectively hinged to the connecting part through the pin shaft; the bearing is located in the mounting groove, and is arranged between the pin shaft and the movable part, the bearing has an inner ring and an outer ring, the outer ring is interference fit with the movable part, the end face of the inner ring abuts against the connecting part, and the end face of the outer ring abuts against the movable part. The movable part and the connecting part are connected by a pin shaft, and the rotational cooperation between the pin shaft and the bearing ensures the stability of the connection between the pin shaft and the movable part. Then, the outer ring end face of the bearing abuts the movable part, and the inner ring end face abuts the connecting part, which ensures that the two movable parts will not be interfered by the connecting part during the relative rotation, and prevents the two movable parts from tilting to both sides during the rotation process, thereby ensuring the stability of the two movable parts during the rotation process.

[0007] Furthermore, each of the rotating parts is provided with a first through hole penetrating through the two sides of the rotating part, and each of the two sides of the rotating part is also provided with a first slot, wherein the first slot is located at the outer periphery of the first through hole; four bearings are provided, and each two bearings are respectively installed in the two first slots of one rotating part; each pin is passed through the first through hole of the same rotating part and the inner holes of the inner rings of the two bearings, so that the two movable parts are hinged with the connecting part, each outer ring is interference-fitted with the peripheral wall of one of the first slots, and the end face of each outer ring is in contact with the bottom wall of the first slot. The four bearings are respectively located on the two sides of the two rotating parts, so that the connecting part will not interfere with the relative movement of the movable part, and will not tilt to both sides, further ensuring the stability during the adjustment process.

[0008] Furthermore, located in the installation groove, the two opposite inner side surfaces of the connecting member are provided with a second groove for avoiding the bearing, and the second groove is provided with a convex rib that abuts against the inner ring.

[0009] Further, the connecting member includes a first connecting block and a second connecting block, the mounting groove is formed between the first connecting block and the second connecting block, one side of the first connecting block extends toward the second connecting block to form a connecting portion, the first connecting block is connected to the second connecting block through the connecting portion, two second through holes are provided on the first connecting block, and two second through holes are provided on the second connecting block, the second through holes provided on the first connecting block are arranged opposite to the second through holes provided on the second connecting block, and each of the pin shafts is inserted into two oppositely arranged second through holes.

[0010] Furthermore, a limiting portion cooperating with the connecting portion to limit position is provided on the opposite end of each movable member.

[0011] Further, the pin shaft includes a pin portion and a shaft portion connected to the pin portion, a pin groove is provided on the side of the first connecting block facing away from the second connecting block, the pin groove is located at the outer periphery of the second through hole, the pin portion is provided in the pin groove, the shaft portion is locked in two oppositely arranged second through holes at the same time, a locking hole is provided at one end of the shaft portion facing away from the pin portion, the rotating joint assembly also includes a fastener, a mounting hole is provided on the side of the second connecting block facing away from the first connecting block, the mounting hole is located at the outer periphery of the second through hole, the fastener includes a tightening portion embedded in the mounting hole, and a locking portion connected to the tightening portion, the fastener passes through the second through hole on the second connecting block, and is locked with the locking hole on the shaft portion.

[0012] Furthermore, a gasket is provided between the tightening portion and the second connecting block.

[0013] Further, there is an interference fit between the pin shaft and the inner ring; and / or there is a clearance fit between the pin shaft and the first through hole.

[0014] On the other hand, a lifting mechanism is also provided, comprising a driving assembly, a supporting assembly and a rotating joint assembly as described in any one of the above, wherein the power end of the driving assembly is connected to the rotating joint assembly and is configured to drive the rotating joint assembly to move, the rotating joint assembly is rotatably connected to the supporting assembly, and the rotating joint assembly drives the supporting assembly to move up and down when it moves; the supporting assembly comprises a rotating roller module.

[0015] On the other hand, a display device is also provided, including a shell, a flexible screen module and a lifting mechanism, the shell being provided with an opening, the interior of the shell being provided with an installation cavity which is interconnected with the opening, the drum module being configured to enter and exit the installation cavity through the opening, the flexible screen module being carried on the drum module and configured to follow the drum module to enter and exit the installation cavity.

[0016] The beneficial effects of the present application are as follows: the bearing is arranged between the movable part and the connecting part, and it is ensured that the end face of the bearing on the inner ring abuts against the connecting part, and the end face of the outer ring abuts against the movable part, and the axial position of the two movable parts is limited by the bearing to prevent the two movable parts from shaking during the rotation process; the stable rotation of the two movable parts in the radial direction is realized through the rotational cooperation between the bearing and the pin shaft, and the stability of the adjustment of the lifting mechanism during the lifting process is further guaranteed while ensuring the stable rotation of the two movable parts, thereby achieving the purpose of stably supporting the lifting of the flexible screen module.

[0017] In addition, the bearing can reduce the friction and wear of the moving parts when they rotate. When one of the moving parts rotates due to an external force, the friction between the two moving parts is greatly reduced due to the rolling friction of the bearing, making the rotation smoother. At the same time, due to the close fit between the pin and the bearing, the swing of the connection position is effectively limited, thereby improving the operating stability of the entire structure; and the rolling friction of the bearing reduces the wear between the moving parts, thereby extending the service life of the rotating joint assembly. Due to the enhanced stability of the structure, the lifting mechanism using the rotating joint assembly has better adjustment stability, and the display device using the lifting mechanism can be smoother and more precise when performing storage actions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application is further described in detail below based on the drawings and embodiments.

[0019] Figure 1A three-dimensional diagram of the rotary joint assembly described in an embodiment of the present application;

[0020] Figure 2 For this application Figure 1 The enlarged schematic diagram at A in the middle;

[0021] Figure 3 It is a front view of the rotary joint assembly described in the embodiment of the present application;

[0022] Figure 4 For this application Figure 3 Schematic diagram of the cross section at BB;

[0023] Figure 5 An exploded view of the rotary joint assembly described in an embodiment of the present application;

[0024] Figure 6 A three-dimensional diagram of the connecting member described in the embodiment of the present application;

[0025] Figure 7 A three-dimensional diagram of a bearing according to an embodiment of the present application;

[0026] Figure 8 A three-dimensional diagram of the pin described in the embodiment of the present application;

[0027] Fig. 9 A three-dimensional diagram of the fastener according to an embodiment of the present application;

[0028] Fig.10 A three-dimensional diagram of the lifting mechanism described in the embodiment of the present application;

[0029] Fig.11 A three-dimensional diagram of the display device according to an embodiment of the present application

[0030] In the figure: 110, rotating joint assembly; 1, movable part; 101, rotating part; 102, first slot; 103, outer gear; 104, first through hole; 105, limiting part; 2, bearing; 201, inner ring; 202, outer ring; 3, connecting part; 301, first connecting block; 302, second connecting block; 303, connecting part; 304, second slot; 305, mounting hole; 306, avoidance position; 307, second through hole; 308, convex rib; 4, pin shaft; 401, pin part; 402, shaft part; 403, locking hole; 5, fastener; 501, tightening part; 502, locking part; 6, washer; 7, screw; 120, driving assembly; 130, supporting assembly; 1301, drum module; 140, shell; 1401, opening; 150, flexible screen module. DETAILED DESCRIPTION

[0031] In order to make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0032] In the description of this application, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] The existing rotating joint assembly generally includes connecting rods, connecting blocks, hinge pins and other structural parts. The front and rear connecting blocks fix the two connecting rods, and the hinge pin is used to connect and fix them in the middle, so as to realize the rotation between the two connecting rods. However, since the hinge pin and the connecting rod are directly fixed, the step size tolerance of the hinge pin is prone to cause the connecting rod to swing back and forth, and the stability is poor. Moreover, when the connecting rod rotates, it is difficult to make the gap between the connecting block and the connecting rod consistent, resulting in different friction forces when the connecting rod rotates, either loose or tight, and the rotation posture is prone to deviations, and the control accuracy cannot be guaranteed.

[0035] Therefore, this embodiment provides a revolute joint assembly 110 with high stability. Figure 1-Figure 8As shown, it comprises: two movable members 1, a connecting member 3, a pin 4 and a bearing 2. The opposite ends of the two movable members 1 extend to form a rotating part 101, each of which is provided with an outer gear 103. The two movable members 1 can rotate synchronously by meshing with the outer gear 103. The connecting member 3 is formed with a mounting groove. The rotating parts 101 of the two movable members 1 are arranged in the mounting groove and are respectively hinged with the connecting member 3 through the pin 4. The bearing 2 is located in the mounting groove and is arranged between the pin 4 and the movable member 1. The bearing 2 has an inner ring 201 and an outer ring 202. The outer ring 202 is interference fit with the movable member 1. The end face of the inner ring 201 abuts against the connecting member 3, and the end face of the outer ring 202 abuts against the movable member 1. .

[0036] Based on the above scheme, the rotating joint assembly 110 includes two movable parts 1, each of which is provided with a rotating part 101 at one end, and each of the rotating parts 101 is provided with an external gear 103. The rotating cooperation of the two external gear teeth 103 allows the two movable parts 1 to rotate in relative directions. A bearing 2 is installed on the rotating part 101 of each movable part 1. The function of the bearing 2 is to reduce the friction of the movable part 1 during rotation to ensure smooth and precise movement. The two movable parts 1 are hinged in the installation groove through the pin 4. It can also be understood that the connecting part 3 is covered at the connection position of the two movable parts 1, and an avoidance position 306 is opened on the connecting part 3 along the rotation direction of the movable part 1. The design of the avoidance position 306 allows the two movable parts 1 to have enough space to move when rotating to avoid obstruction. The bearing 2 is arranged between the pin 4 and the movable part 1. The cooperation between the pin 4 and the bearing 2 ensures the stability of the movable part 1 during rotation and prevents the movement deviation caused by friction or load. More importantly, the end face of the inner ring 201 of the bearing 2 abuts the connecting part 3, and the end face of the outer ring 202 abuts the movable part 1. It should be noted that there is a gap between the end face of the inner ring 201 and the movable part 1, and there is also a gap between the end face of the outer ring 202 and the connecting part 3. The purpose of this design is to achieve stable cooperation between the movable part 1 and the connecting part 3 in the axial direction through the bearing 2, avoid shaking and instability during rotation, and avoid the problem of being unable to rotate due to the abutment of the end faces. In this scheme, by arranging the bearing 2 on the movable part 1, the rotation cooperation between the pin 4 and the bearing 2 effectively reduces the friction between the movable part 1 and limits the swing of the connection position, thereby significantly improving the stability of the rotating joint assembly 110. Reducing friction and improving stability can not only improve the accuracy of motion control, but also reduce the heat and wear generated by friction, thereby extending the service life of the rotating joint assembly 110. At the same time, the rotating joint assembly 110 is flexibly designed to adapt to different load and motion requirements and is suitable for a variety of precision control occasions, such as medical equipment, industrial robots, etc. At the same time, due to the reasonable structural design, key components such as bearings 2 and pins 4 are easy to inspect and replace, which simplifies maintenance work and reduces maintenance costs.

[0037] In addition, the meshing between the outer gear teeth 103 can ensure that each step of the rotation is accurate, reducing errors caused by sliding or friction. When two or more movable parts 1 with outer gear teeth 103 are meshed with each other, the connection between them will be more stable and less prone to shaking or misalignment. In addition, the structural design of the outer gear teeth 103 enables them to withstand greater torque and load, thereby increasing the load-bearing capacity of the entire system.

[0038] It is worth noting that, in practice, the two movable parts 1 mentioned above may have different structures except for the structure of the connection position which needs to remain relatively consistent, that is, the two movable parts 1 may actually be two different structural parts, but both need to have a rotating part 101 and an external gear 103 arranged on the rotating part 101, and mesh with each other through the external gear 103, so as to ensure relative rotation.

[0039] In the above scheme, each movable part 1 is only provided with one bearing 2 to ensure the stability of rotation. In this case, since the bearing 2 is only provided on one side of the rotating part 101, the other side of the rotating part 101 needs to maintain relative fit with the connecting part 3 to avoid a large gap causing unstable rotation. At the same time, in response to the problems existing in the above-mentioned scheme, the following further scheme is proposed, namely, each of the rotating parts 101 is provided with a first through hole 104 penetrating through the two side surfaces of the rotating part 101, and each of the two side surfaces of the rotating part 101 is also provided with a first slot 102, wherein the first slot 102 is located at the outer periphery of the first through hole 104; four bearings 2 are provided, and every two bearings 2 are respectively installed in two first slots 102 on the same rotating part 101; each of the pin shafts 4 passes through the first through hole 104 of the same rotating part 101 and the inner holes of the inner rings 201 of the two bearings 2, so that the two movable parts 1 are hinged to the connecting part 3, each of the outer rings 202 is interference fit with the peripheral wall of one of the first slots 102, and the end face of each of the outer rings 202 abuts against the bottom wall of one of the first slots 102.

[0040] Based on the above scheme, two bearings 2 are installed in the two first slots 102 on both side surfaces of the rotating part 101 of each movable part 1, so that the movable part 1 can be stably supported on both sides during rotation, and the pin 4 passes through the inner holes of the inner rings 201 of the two bearings 2 on the same rotating part 101 and the first through hole 104, thereby stably hinged the movable part 1 and the connecting part 3 together, and at the same time ensure the tight fit between the pin 4 and the bearing 2, so when the movable part 1 is rotated by external force, the bearings 2 on both sides simultaneously bear and disperse this force, making the rotation more stable and reducing the deflection or swing that may occur in a single bearing 2. In addition, since the rotating part 101 of the movable part 1 is supported by bearings 2 on both sides, the fit between the movable part 1 and the connecting part 3 can be more uniform, reducing the gap and instability that may be caused by unilateral support. The symmetrical support design of double bearings 2 significantly improves the rotation stability of the movable part 1. The bearings 2 on both sides work together to effectively disperse the force during the rotation process, prevent the deflection and swing of the movable part 1, and make the entire structure more stable and reliable during rotation. The design of a movable part 1 with double bearings 2 also increases the contact area between the pin shaft 4 and the bearing 2, thereby reducing the pressure per unit area, reducing friction and wear, and extending the service life.

[0041] At the same time, the first slot 102 opened on the rotating part 101 is precisely designed according to the size and shape of the outer ring 202 of the bearing 2, and the outer ring 202 is interference-fitted with the peripheral wall of the first slot 102, and the end face of the outer ring 202 is in contact with the bottom wall of the first slot 102, so that when the bearing 2 is placed in the first slot 102, it can be tightly matched with the first slot 102 to ensure the fixed position and stable installation of the bearing 2. The existence of the first slot 102 not only provides an installation space for the bearing 2, but also forms a stable connection between the bearing 2 and the rotating part 101 through the shape and size restrictions of the first slot 102, which can resist external vibration and impact and maintain the stable operation of the bearing 2. Stable installation can reduce the relative movement between the bearing 2 and the rotating part 101, thereby reducing friction and wear, helping to extend the service life of the bearing 2, and reducing the frequency of maintenance and replacement. In addition, the stable operation of the bearing 2 can ensure the accuracy and stability of the movement of the component, especially in applications requiring high-precision positioning or rapid response. This advantage is particularly obvious.

[0042] Then, the interference fit utilizes the elasticity of the material. During the installation process, the outer ring 202 of the bearing 2 will be slightly larger than the inner diameter of the first slot 102. By applying a certain force, the bearing 2 is pressed into the first slot 102. During this process, the material will undergo elastic deformation, so that the outer ring 202 of the bearing 2 can be tightly embedded in the first slot 102. When the bearing 2 is completely embedded in the first slot 102, the material begins to recover and generates a clamping force on the bearing 2. This clamping force can firmly fix the bearing 2 in the first slot 102 to prevent it from relative rotation or loosening. The interference fit can ensure the stable connection between the bearing 2 and the movable part 1, and reduce the looseness and displacement caused by vibration, impact and other factors. This stability is crucial to ensure the stability and accuracy of the movement of the component. Since the bearing 2 is firmly fixed in the first slot 102, it will not shake or generate noise during the rotation process, which helps to improve the running stability of the component and the user experience. At the same time, the interference fit increases the contact area between the bearing 2 and the rotating part 101, thereby improving the load-bearing capacity of the component, and also reduces wear and friction due to the reduction of relative movement, thereby extending the service life of the component.

[0043] It is worth mentioning that in the interference fit, the tolerance zone of the outer ring 202 of the bearing 2 should be located below the inner diameter tolerance zone of the first slot 102 of the rotating part 101, so that the bearing 2 can be smoothly pressed into the first slot 102 and generate sufficient clamping force. The assembly method can be static press-in method, dynamic press-in method or temperature difference assembly method, and the specific method should be determined according to the actual situation and requirements.

[0044] In some embodiments, the connecting member 3 adopts a split design, including a first connecting block 301 and a second connecting block 302, the installation groove is formed between the first connecting block 301 and the second connecting block 302, the first connecting block 301 extends toward the second connecting block 302 on the side away from the avoidance position 306 to form a connecting portion 303, the first connecting block 301 is connected to the second connecting block 302 through the connecting portion 303, two second through holes 307 are provided on the first connecting block 301, and two second through holes 307 are provided on the second connecting block 302, the second through holes 307 provided on the first connecting block 301 and the second through holes 307 provided on the second connecting block 302 are arranged opposite to each other, and each of the pin shafts 4 is inserted into two oppositely arranged second through holes 307. The connector 3 is divided into two independent parts, a first connector block 301 and a second connector block 302. This design allows each part to be operated and installed separately, greatly improving the flexibility of operation. The connecting portion 303 is used to tightly connect the two separate parts together to ensure the stability and reliability of the entire connector 3. Since the connector 3 is a split design, the installation process can be divided into two steps. First, the first connector block 301 can be installed and positioned with the bearing 2 on one side of the movable part 1; then, the second connector block 302 can be installed with the bearing 2 on the other side, and the two separate parts can be connected together through the connecting portion 303. This step-by-step installation method greatly simplifies the installation process and improves installation efficiency. In addition, the split connector 3 can better adapt to the installation requirements of the bearings 2 on both sides of the movable part 1. Since the two connecting blocks are independent, they can be fine-tuned according to actual conditions to ensure precise matching with the bearings 2, so that the connector 3 has stronger adaptability and flexibility; moreover, the pin 4 is inserted into two relative second through holes 307, and then through the interference fit between the pin 4 and the second through hole 307, that is, the size of the second through hole 307 is slightly smaller than the size of the pin 4, which is equivalent to the pin 4 being directly locked in the two second through holes 307, which can better stabilize the pin 4 and the two movable parts 1.

[0045] In addition, located in the installation groove, the two opposite sides of the connector 3 are provided with a second slot 304 for avoiding the bearing 2, and the second slot 304 is provided with a convex rib 308 that abuts against the inner ring 201. In this scheme, when the convex rib 308 abuts against the inner ring 201, a gap is left between the outer ring 202 of the bearing 2 and the bottom wall of the second slot 304, so as to avoid direct contact between the outer ring 202 and the second slot 304 and affect the rotation. At the same time, when the bearing 2 is simultaneously embedded in the first slot 102 of the movable part 1 and the second slot 304 of the connector 3, the two slots form a protective space, which completely wraps the bearing 2. This design can prevent the bearing 2 from being directly impacted and damaged by the outside world, and can also greatly reduce the probability of dust and foreign matter entering the bearing 2, thereby extending the service life of the bearing 2.

[0046] At the same time, each movable member 1 is provided with a limiting portion 105 on the opposite end thereof, which cooperates with the connecting portion 303 to limit the position. When the limiting portion 105 abuts against the connecting portion 303, the rotation positions of the two movable members 1 can be limited to avoid excessive rotation and ensure the stability of rotation.

[0047] In addition, the connection part 303 and the second connection block 302 can be connected by means of screws 7, snap-fitting or mortise and tenon, among which the snap-fitting and mortise and tenon methods are relatively more convenient and simple. The mortise and tenon method uses the friction of the material to fix the connection part 303 and the second connection block 302 together through the cooperation of the tenon and the mortise. In order to ensure the stability of the connection between the first connection block 301 and the second connection block 302, screws 7 can be used for connection. A plurality of screw 7 holes are opened at the corresponding positions of the connection part 303 and the second connection block 302, and then the connection and fixation are carried out by screws 7. The installation is more stable and the disassembly is also convenient.

[0048] Specifically, the pin shaft 4 includes a pin portion 401 and a shaft portion 402 connected to the pin portion 401. A pin groove is provided on the side of the first connection block 301 away from the second connection block 302. The pin groove is located at the periphery of the second through hole 307. The pin portion 401 is provided in the pin groove. The shaft portion 402 is locked in two oppositely arranged second through holes 307 at the same time. A locking hole 403 is provided on one end of the shaft portion 402 away from the pin portion 401. The rotating joint assembly 110 It also includes a fastener 5. A mounting hole 305 is opened on the side of the second connecting block 302 facing away from the first connecting block 301. The mounting hole 305 is located at the periphery of the second through hole 307. The fastener 5 includes a tightening portion 501 embedded in the mounting hole 305, and a locking portion 502 connected to the tightening portion 501. The locking portion 502 passes through the second through hole 307 on the second connecting block 302 and is locked with the locking hole 403 on the shaft portion 402. The engagement of the pin portion 401 and the pin groove defines the axial position of the entire pin shaft 4, and then the shaft portion 402 passes through the second through hole 307 and the first through hole 104, and is tightened and locked with the locking portion 502 of the fastener 5 through the provided locking hole 403. Similarly, the tightening portion 501 of the fastener 5 is engaged in the mounting hole 305, thereby defining the axial position of the fastener 5, and then the locking portion 502 passes through the second through hole 307 and is locked with the shaft portion 402 to complete further fixation of the pin shaft 4. This locking cooperation can ensure the stability of the position of the pin shaft 4 on the connecting member 3 to avoid position displacement during movement. Among them, the fastener 5 may adopt a thread, a pin or other forms of fastening structure, and cooperate with the corresponding parts on the pin shaft 4, such as a threaded hole, a pin hole, etc., that is, the locking hole 403 is a threaded hole, and the locking part 502 is provided with a locking thread matching the threaded hole. By rotating or applying pressure, the fastener 5 can tightly lock the pin shaft 4 to prevent it from loosening or moving. When the fastener 5 is locked with the pin shaft 4, a certain friction force and preload force will be generated between them, and these forces can resist external interference and maintain the stable position of the pin shaft 4. The locking cooperation between the fastener 5 and the pin shaft 4 can significantly improve the stability of the system. This stability is not only reflected in static conditions, but also can be maintained during dynamic movement. Through the locking effect of the fastener 5, the pin shaft 4 is firmly fixed on the connecting member 3, avoiding the situation of positional displacement during movement, which is crucial to ensure the accuracy and reliability of the entire system. In addition, since the pin shaft 4 is stably locked on the connecting member 3, the wear and damage caused by loosening or movement are reduced, which helps to extend the service life of the system and reduce maintenance costs.

[0049] In practical applications of the above scheme, assuming that in a robot arm system, the pin shaft 4 is used to connect the various joints of the arm, if there is no fastener 5 to lock the pin shaft 4, then during the movement, the pin shaft 4 may be displaced due to vibration, impact or other external factors, which will not only affect the accuracy and stability of the robot arm, but may also cause system failure or damage. By using fastener 5 to lock the pin shaft 4, the stability and accuracy of the arm during the movement can be ensured, thereby improving the performance and reliability of the entire system.

[0050] In addition, a washer 6 is provided between the fastener 5 and the connector 3, that is, a washer 6 is provided between the tightening portion 501 and the second connecting block 302. The washer 6 can prevent the fastener 5 from directly contacting and scratching the surface of the second connecting block 302 during the locking process, and can also disperse the pressure applied by the tightening portion 501 on the second connecting block 302 to a larger range by increasing the contact area, thereby reducing the local pressure on the surface of the mounting hole 305 on the second connecting block 302 and avoiding possible indentations or damage. Moreover, the washer 6 forms an additional material layer between the tightening portion 501 and the second connecting block 302, which helps to better fix the tightening portion 501 and the second connecting block 302 and reduce looseness caused by external factors such as vibration and impact. Among them, there are many types of washers 6 according to different uses and materials, such as precision washers 6, flat washers 6, spring washers 6, locking washers 6, etc. When selecting washers 6, factors such as their working environment, stress conditions, and corrosion resistance need to be considered. For example, for situations where loosening prevention is required, a washer 6 with a locking function can be selected; for high temperature or corrosive environments, a washer 6 made of high temperature resistant or corrosion resistant materials needs to be selected; and in this solution, due to the need for high control accuracy, the washer 6 is preferably a precision washer 6.

[0051] It is worth mentioning that in order to better install the gasket 6, the mounting hole 305 opened on the connecting member 3 needs to be compatible with the size and shape of the gasket 6, so that the gasket 6 can be directly embedded in the mounting hole 305, and the locking portion 502 can also be hidden on the second connecting block 302 when locking the shaft portion 402, and there will be no bulges, thereby ensuring the flatness and aesthetics of the overall structure.

[0052] In some embodiments, the pin 4 and the inner ring 201 are in interference fit; and / or the pin 4 and the first through hole 104 are in clearance fit. In this solution, by defining the matching relationship of the two connection positions, on the one hand, the stability of the connection between the pin 4 and the bearing 2 can be improved, that is, the pin 4 and the inner ring 201 of the bearing 2 are relatively fixed and will not rotate relative to each other, so that when the two movable parts 1 rotate, there will be no follow-up rotation; on the other hand, it can avoid the friction between the pin 4 and the rotating part 101 affecting the rotation, because the rotating part 101 and the inner ring 201 of the bearing 2 will rotate relative to each other. If there is contact between the pin 4 and the first through hole 104 of the rotating part 101, friction will inevitably occur during the rotation process, thereby hindering the rotation. In severe cases, it may even make it impossible for the two movable parts 1 to rotate relative to each other. Therefore, it is necessary to ensure that there is a certain gap between the pin 4 and the first through hole 104 to avoid interference.

[0053] Specifically, the movable part 1 is a connecting rod, which has a strip-shaped structure. As a relatively simple movable part 1 structure, the connecting rod can be applied to a common rotating joint assembly 110 , does not require an overly complicated connection relationship, and improves assembly efficiency.

[0054] As an optional specific implementation scheme, the movable part 1 is of an irregular shape, including two integrally formed movable rods, which are connected at a certain angle, such as 90°. Based on the irregular movable part 1, the two movable parts 1 can be combined into more different joint structures, which can expand the application scope of the joint structure to a greater extent.

[0055] On the other hand, Fig.10 As shown, a lifting mechanism is also provided, comprising a driving assembly 120, a supporting assembly 130 and any of the above described rotating joint assemblies 110, wherein the power end of the driving assembly 120 is connected to the rotating joint assembly 110 and is configured to drive the rotating joint assembly 110 to move, the rotating joint assembly 110 is rotationally connected to the supporting assembly 130, and the rotating joint assembly 110 drives the supporting assembly 130 to move up and down when the rotating joint assembly 110 moves; the supporting assembly 130 comprises a rotating roller module 1301. In this scheme, the power end of the driving assembly 120 is connected to the rotating joint assembly 110, that is, connected to one of the movable parts 1, and the other movable part 1 is connected to the supporting assembly 130, and the driving assembly 120 drives one movable part 1 to rotate relative to the other movable part 1, thereby changing the length of the rotating joint assembly 110 in the lifting direction, thereby causing the roller module 1301 to move up and down along the lifting direction under the driving action of the rotating joint assembly 110.

[0056] As a specific application of the above lifting mechanism, Fig.11As shown, a display device is also provided, including a shell 140, a flexible screen module 150 and a lifting mechanism, the shell 140 is provided with an opening 1401, the shell 140 is provided with an installation cavity interconnected with the opening 1401, the drum module 1301 is configured to enter and exit the installation cavity through the opening 1401, and the flexible screen module 150 is carried on the drum module 1301 and configured to follow the drum module 1301 to enter and exit the installation cavity. In this solution, the flexible screen module 150 is carried on the drum module 1301, that is, the flexible screen module 150 and the drum module 1301 extend from the opening 1401 under the driving action of the rotating joint assembly 110 to be exposed to the outside of the shell 140, or move downward from the outside of the shell 140 under the driving action of the rotating joint assembly 110 and then be accommodated in the installation cavity of the shell 140, so that the display device is smaller in size and easy to carry.

[0057] In the description of this article, it should be understood that the terms "upper", "lower", "left", "right", etc., and other directions or positional relationships are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of this application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0058] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0059] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0060] The technical principles of the present application are described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present application and cannot be interpreted as limiting the scope of protection of the present application in any way. Based on the explanations herein, those skilled in the art can think of other specific implementation methods of the present application without creative work, and these methods will fall within the scope of protection of the present application.

Claims

1. A revolute joint assembly (110), characterized in that: include: Two movable members (1), opposite ends of the two movable members (1) respectively extending to form a rotating portion (101), each rotating portion (101) being provided with an outer gear tooth (103), and the two movable members (1) meshing with each other through the outer gear teeth (103) can rotate synchronously; The connecting member (3) is formed with a mounting groove, and the rotating parts (101) of the two movable members (1) are arranged in the mounting groove and are respectively hinged to the connecting member (3) through pins (4); A bearing (2) is located in the mounting groove and is arranged between the pin shaft (4) and the movable part (1). The bearing (2) comprises an inner ring (201) and an outer ring (202). The outer ring (202) is interference fit with the movable part (1). The end face of the inner ring (201) abuts against the connecting part (3), and the end face of the outer ring (202) abuts against the movable part (1).

2. The revolute joint assembly (110) according to claim 1, characterized in that: Each of the rotating parts (101) is provided with a first through hole (104) penetrating through the two side surfaces of the rotating part (101), and each of the two side surfaces of the rotating part (101) is also provided with a first slot (102), wherein the first slot (102) is located at the outer periphery of the first through hole (104); four bearings (2) are provided, and every two bearings (2) are respectively installed in two first slots (102) on the same rotating part (101); each of the pin shafts (4) is passed through the first through hole (104) on the same rotating part (101) and the inner holes of the inner rings (201) of the two bearings (2), so that the two movable parts (1) are hinged with the connecting part (3), each of the outer rings (202) is interference fit with the peripheral wall of one of the first slots (102), and the end face of each of the outer rings (202) is in contact with the bottom wall of one of the first slots (102).

3. The revolute joint assembly (110) according to claim 2, characterized in that: Located in the installation groove, the connecting member (3) is provided with a second groove (304) on two opposite inner side surfaces for avoiding the bearing (2), and a convex rib (308) is convexly provided in the second groove (304) for abutting against the inner ring (201).

4. The revolute joint assembly (110) according to claim 2, characterized in that: The connecting member (3) comprises a first connecting block (301) and a second connecting block (302), the mounting groove being formed between the first connecting block (301) and the second connecting block (302), a side surface of the first connecting block (301) extending toward the second connecting block (302) to form a connecting portion (303), the first connecting block (301) being connected to the second connecting block (302) via the connecting portion (303), the first connecting block (301) being provided with two second through holes (307), the second connecting block (302) being provided with two second through holes (307), the second through holes (307) provided on the first connecting block (301) being arranged opposite to the second through holes (307) provided on the second connecting block (302), and each of the pin shafts (4) being inserted into two oppositely arranged second through holes (307).

5. The revolute joint assembly (110) according to claim 4, characterized in that: A limiting portion (105) is provided on the opposite end of each movable part (1) and cooperates with the connecting portion (303) to limit the position.

6. The revolute joint assembly (110) according to claim 4, characterized in that: The pin shaft (4) comprises a pin portion (401) and a shaft portion (402) connected to the pin portion (401); a pin groove is provided on a side of the first connection block (301) away from the second connection block (302); the pin groove is located at the periphery of the second through hole (307); the pin portion (401) is provided in the pin groove; the shaft portion (402) is locked in two oppositely arranged second through holes (307); a locking hole (403) is provided at one end of the shaft portion (402) away from the pin portion (401); the rotary joint assembly (110) further comprises a fastening The fastener (5) comprises a mounting hole (305) on a side of the second connecting block (302) facing away from the first connecting block (301), the mounting hole (305) being located at the periphery of the second through hole (307), the fastener (5) comprising a tightening portion (501) engaged with the mounting hole (305), and a locking portion (502) connected to the tightening portion (501), the locking portion (502) passing through the second through hole (307) on the second connecting block (302) and being locked in cooperation with the locking hole (403) on the shaft portion (402).

7. The revolute joint assembly (110) according to claim 6, characterized in that: A washer (6) is provided between the tightening portion (501) and the second connecting block (302).

8. The revolute joint assembly (110) according to claim 7, characterized in that: There is an interference fit between the pin shaft (4) and the inner ring (201); and / or there is a clearance fit between the pin shaft (4) and the first through hole (104).

9. A lifting mechanism, characterized in that: It comprises a driving component (120), a supporting component (130) and a rotating joint component (110) as described in any one of claims 1 to 8, wherein the power end of the driving component (120) is connected to the rotating joint component (110) and is configured to drive the rotating joint component (110) to move, the rotating joint component (110) is rotatably connected to the supporting component (130), and when the rotating joint component (110) moves, it drives the supporting component (130) to move up and down; the supporting component (130) comprises a rotating roller module (1301).

10. A display device, characterized in that: It includes a shell (140), a flexible screen module (150) and the lifting mechanism according to claim 9, the shell (140) is provided with an opening (1401), the interior of the shell (140) is provided with an installation cavity interconnected with the opening (1401), the drum module (1301) is configured to enter and exit the installation cavity through the opening (1401), and the flexible screen module (150) is carried on the drum module (1301) and is configured to follow the drum module (1301) to enter and exit the installation cavity.

Images