Compact roller screw rod of multi-degree-of-freedom robot joint

Abstract

The utility model relates to the technical field of roller screw rods, in particular to a compact roller screw rod of a multi-degree-of-freedom robot joint, which comprises a driving screw rod and a transmission seat in threaded connection with the outer side of the driving screw rod, and a lubricating oil filling hole communicated with the inner side of the transmission seat is arranged on one side of the transmission seat. According to the lubricating oil filling device, through the arrangement of the lubricating oil filling hole, the filling pipe, the threaded groove, the threaded block, the air inlet assembly, the piston and the compression spring, when the device is used, the threaded block is screwed out, after a proper amount of lubricating oil is added into the inner side of the filling pipe, the threaded block is screwed out, and then the lubricating oil is filled into the filling pipe. The mounting frame is pulled, the threaded block is screwed into the inner side of the threaded groove, then the mounting frame is loosened, at the moment, the compression spring continuously resets to press the lubricating oil into the inner side of the transmission seat, through the design, the space between the pin rollers in the transmission seat can be filled with the lubricating oil, lubricating is more sufficient, and dust can be prevented from entering the transmission seat.

Description

Technical Field

[0001] This utility model relates to the field of roller screw technology, specifically a compact roller screw for a multi-degree-of-freedom robot joint. Background Technology

[0002] Compact ball screws for multi-degree-of-freedom robot joints, typically referring to planetary ball screws, are high-end precision transmission components that play a crucial role in the robotics field. Planetary ball screws offer numerous advantages, particularly in applications requiring precise control and high thrust output. They exhibit significant advantages in miniaturization, as their structural design allows for high thrust output within a relatively small volume. This is especially important for space-constrained multi-degree-of-freedom robot joints, helping robot designers integrate more functions within limited space and improve the overall performance of the robot.

[0003] Existing compact roller screws are widely used, but when using lubricating oil for lubrication, the existing devices can usually only apply the lubricating oil to the outside of the screw, and the rollers in the transmission seat cannot be coated with lubricating oil and cannot be fully lubricated. Therefore, to address the above problems, a compact roller screw for multi-degree-of-freedom robot joints is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a compact roller screw for multi-degree-of-freedom robot joints to solve the problem mentioned in the background art that the rollers in the existing transmission seats cannot be adequately lubricated.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A compact roller screw for a multi-degree-of-freedom robot joint includes a drive screw and a transmission seat threaded to the outside of the drive screw. A lubricating oil filling hole communicating with the inside of the transmission seat is provided on one side of the transmission seat. A filling tube fixedly connected to the outside of the transmission seat is provided on one side of the lubricating oil filling hole. A threaded groove is provided on the top of the inner side of the filling tube. A threaded block is threadedly connected to the inner side of the threaded groove. An air intake assembly is installed inside the threaded block. A piston is installed at the bottom of the air intake assembly. A compression spring is fixedly connected to the top of the piston. A limiter is installed on the outside of the air intake assembly.

[0007] Preferably, the piston is disposed inside the filling tube and fits tightly against the inside of the filling tube, and the top end of the compression spring is fixedly connected to the bottom end of the threaded block.

[0008] Preferably, the air intake assembly includes an air pipe vertically disposed inside the threaded block and passing through the threaded block, an air hole communicating with the air pipe is opened on the outer side of the bottom of the air pipe, and an installation frame communicating with the air pipe is fixedly connected to the top of the air pipe, and a filter block is provided on the inner side of the installation frame.

[0009] Preferably, the connection between the air tube and the threaded block is a sliding connection, and the connection between the filter block and the mounting frame is a snap-fit ​​connection.

[0010] Preferably, multiple air holes are provided, and the air holes are distributed along the polar axis on the outside of the trachea.

[0011] Preferably, the limiter includes semi-open tubes symmetrically arranged on the outside of the trachea, the semi-open tubes being hinged together by spring hinges, and a handle being fixedly connected to the outside of each semi-open tube.

[0012] Preferably, the inner side of the semi-open tube is in close contact with the outer side of the trachea, the top end of the semi-open tube is in close contact with the bottom end of the mounting frame, and the bottom end of the semi-open tube is in close contact with the top end of the threaded block.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. In this utility model, by setting a lubricating oil filling hole, filling pipe, threaded groove, threaded block, air intake assembly, piston and clamping spring, when using the device, the threaded block is unscrewed, an appropriate amount of lubricating oil is added to the inside of the filling pipe, the mounting frame is pulled and the threaded block is screwed into the inside of the threaded groove, and then the mounting frame is released. At this time, the clamping spring continues to reset and press the lubricating oil into the inside of the transmission seat. This design can fill the space between the rollers in the transmission seat with lubricating oil, making the lubrication more sufficient, and can prevent dust from entering the transmission seat.

[0015] 2. In this utility model, by setting a limiter, a half-open tube, a spring hinge and a handle, the mounting frame is lifted and the limiter is installed on the outside of the air tube when adding lubricating oil, so as to limit the air tube and make it more convenient for the operator to operate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a partial disassembly diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the limiter structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the threaded block installation structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the tracheal connection component of this utility model.

[0021] In the diagram: 1. Drive screw; 2. Transmission seat; 3. Lubricating oil filling hole; 4. Filling pipe; 5. Threaded groove; 6. Threaded block; 7. Air intake assembly; 71. Air pipe; 72. Air hole; 73. Mounting frame; 74. Filter block; 8. Piston; 9. Compression spring; 10. Limiter; 101. Half-open pipe; 102. Spring hinge; 103. Handle. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0024] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0025] Please see Figure 1-5 This utility model provides a technical solution:

[0026] A compact roller screw for a multi-degree-of-freedom robot joint includes a drive screw 1 and a transmission seat 2 threadedly connected to the outside of the drive screw 1. A lubricating oil filling hole 3, communicating with the inside of the transmission seat 2, is provided on one side of the transmission seat 2. A filling tube 4, fixedly connected to the outside of the transmission seat 2, is provided on one side of the lubricating oil filling hole 3. A threaded groove 5 is provided on the top of the inner side of the filling tube 4. A threaded block 6 is threadedly connected to the inner side of the threaded groove 5. An air intake assembly 7 is installed inside the threaded block 6. A piston 8 is installed at the bottom of the air intake assembly 7. A compression spring 9 is fixedly connected to the top of the piston 8. A limiter 10 is installed on the outside of the air intake assembly 7. The piston 8 is located inside the filling tube 4 and fits tightly against the inner side of the filling tube 4. The top of the compression spring 9 is fixedly connected to the bottom of the threaded block 6. The air intake assembly 7 includes an air pipe 71 vertically disposed inside the threaded block 6 and passing through the threaded block 6. An air hole communicating with the bottom outer side of the air pipe 71 is provided. 72. The top end of the air pipe 71 is fixedly connected to an installation frame 73 that passes through the air pipe 71. A filter block 74 is provided inside the installation frame 73. The connection between the air pipe 71 and the threaded block 6 is a sliding connection, and the connection between the filter block 74 and the installation frame 73 is a snap-fit ​​connection. Multiple air holes 72 are provided, and the air holes 72 are distributed in a polar axis on the outside of the air pipe 71. Through the provided lubricating oil filling hole 3, filling pipe 4, threaded groove 5, threaded block 6, air intake assembly 7, piston 8 and compression spring 9, when using the device, the threaded block 6 is unscrewed, an appropriate amount of lubricating oil is added to the inside of the filling pipe 4, the installation frame 73 is pulled and the threaded block 6 is screwed into the inside of the threaded groove 5, and then the installation frame 73 is released. At this time, the compression spring 9 continues to reset and press the lubricating oil into the inside of the transmission seat 2. This design can fill the space between the rollers in the transmission seat 2 with lubricating oil, making the lubrication more sufficient, and can prevent dust from entering the transmission seat 2.

[0027] The limiter 10 includes semi-open tubes 101 symmetrically arranged on the outside of the trachea 71. The semi-open tubes 101 are hinged together by spring hinges 102. A handle 103 is fixedly connected to the outside of the semi-open tubes 101. The inside of the semi-open tubes 101 is tightly fitted to the outside of the trachea 71. The top of the semi-open tubes 101 is tightly fitted to the bottom of the mounting frame 73. The bottom of the semi-open tubes 101 is tightly fitted to the top of the threaded block 6. By using the limiter 10, semi-open tubes 101, spring hinges 102 and handles 103, the mounting frame 73 is lifted and the limiter 10 is installed on the outside of the trachea 71 when adding lubricating oil, thereby limiting the trachea 71 and making it more convenient for operators to operate.

[0028] Workflow: When lubricating oil needs to be added, first lift the mounting frame 73, causing the air pipe 71 to slide inside the threaded block 6, which in turn causes the piston 8 to rise. The compression spring 9 is compressed, and the air between the piston 8 and the threaded block 6 enters the air pipe 71 through multiple air holes 72 and is discharged through the mounting frame 73 and the filter block 74. Then, press the handle 103 on the half-open pipe 101 to open the spring hinge 102, opening the two half-open pipes 101. Place the two half-open pipes 101 on the air pipe 73. 1. Release the handle 103 from the outside. The spring hinge 102 returns to its original position, clamping the two semi-open tubes 101 onto the outside of the air tube 71. Then, release the mounting frame 73. The compression spring 9 returns to its original position slightly, causing the air tube 71 to slide inside the threaded block 6 until the top of the semi-open tube 101 is tightly fitted with the bottom of the mounting frame 73 and the bottom of the semi-open tube 101 is tightly fitted with the top of the threaded block 6. Next, unscrew the threaded block 6 from the inside of the threaded groove 5. Add an appropriate amount of lubricating oil to the inside of the filling tube 4 and then screw the threaded block 6 back into the threaded groove. Inside the slot 5, press the handle 103 to remove the half-open tube 101 from the outside of the air tube 71. At this time, the compression spring 9 continues to reset, driving the air tube 71 and piston 8 to move. Outside air enters the air tube 71 through the filter block 74 in the mounting frame 73. The filter block 74 filters the dust in the air. The air entering the air tube 71 enters the inside of the filling tube 4 through the air hole 72. The piston 8 continues to move downward, pressing the lubricating oil into the inside of the transmission seat 2 through the lubricating oil filling hole 3. At this time, the drive screw 1 can be started, so that the transmission seat 2 reciprocates outside the drive screw 1. After the transmission seat 2 moves back and forth several times, the lubricating oil in the filling tube 4 can completely enter the transmission seat 2, so that the rollers in the transmission seat 2 are filled with lubricating oil. The design of the air intake component 7 and its connecting components can directly press the lubricating oil into the transmission seat 2, making the lubrication more sufficient and preventing dust from entering the transmission seat 2. The design of the limiter 10 can limit the air tube 71, making it more convenient for the operator to operate.

[0029] Contents not described in detail in this specification are existing technologies known to those skilled in the art. Standard parts used in this invention can all be purchased commercially, and irregularly shaped parts can be custom-made according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are already mature technologies. The machinery, parts, and equipment all use conventional models from the prior art, and the circuit connections also employ conventional connection methods from the prior art, which will not be detailed here.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A compact roller screw for a multi-degree-of-freedom robot joint, comprising a drive screw (1) and a transmission seat (2) threaded to the outside of the drive screw (1), characterized in that: The transmission seat (2) has a lubricating oil filling hole (3) on one side that communicates with the inner side of the transmission seat (2). The lubricating oil filling hole (3) has a filling pipe (4) fixedly connected to the outer side of the transmission seat (2) on one side. The filling pipe (4) has a threaded groove (5) on the top of its inner side. The threaded groove (5) has a threaded block (6) threadedly connected to its inner side. The threaded block (6) has an air intake assembly (7) installed inside. The bottom of the air intake assembly (7) has a piston (8) installed. The top of the piston (8) has a compression spring (9) fixedly connected. The air intake assembly (7) has a limiter (10) installed on its outer side.

2. The compact roller screw for a multi-degree-of-freedom robot joint according to claim 1, characterized in that: The piston (8) is located inside the filling tube (4) and fits tightly against the inside of the filling tube (4). The top end of the compression spring (9) is fixedly connected to the bottom end of the threaded block (6).

3. The compact roller screw for a multi-degree-of-freedom robot joint according to claim 1, characterized in that: The air intake assembly (7) includes an air pipe (71) that is vertically disposed inside the threaded block (6) and passes through the threaded block (6). An air hole (72) communicating with the air pipe (71) is provided on the outer side of the bottom of the air pipe (71). A mounting frame (73) communicating with the air pipe (71) is fixedly connected to the top of the air pipe (71). A filter block (74) is provided on the inner side of the mounting frame (73).

4. The compact roller screw for a multi-degree-of-freedom robot joint according to claim 3, characterized in that: The connection between the air tube (71) and the threaded block (6) is a sliding connection, and the connection between the filter block (74) and the mounting frame (73) is a snap-fit ​​connection.

5. A compact roller screw for a multi-degree-of-freedom robot joint according to claim 4, characterized in that: The air pores (72) are provided in multiple ways, and the air pores (72) are distributed in a polar axis on the outside of the air tube (71).

6. A compact roller screw for a multi-degree-of-freedom robot joint according to claim 5, characterized in that: The limiter (10) includes a semi-open tube (101) symmetrically arranged outside the trachea (71), the semi-open tubes (101) are hinged to each other by a spring hinge (102), and a handle (103) is fixedly connected to the outside of the semi-open tube (101).

7. A compact roller screw for a multi-degree-of-freedom robot joint according to claim 6, characterized in that: The inner side of the semi-open tube (101) is closely fitted to the outer side of the air tube (71), the top end of the semi-open tube (101) is closely fitted to the bottom end of the mounting frame (73), and the bottom end of the semi-open tube (101) is closely fitted to the top end of the threaded block (6).

Images