Novel rotary union connector

Abstract

The utility model discloses a novel rotary transformer connector. The novel rotary transformer connector includes: fixed seat, rotary seat, rotary cover, support bearing and circuit assembly, and the fixed seat includes fixed cover and the fixed shell and the outer partition board fixedly connected through the thread part left and right ends of fixed cover, the seat body of rotary seat is connected the outer limiting board of fixed shell through limiting ball, and the axle body of rotary seat enters the accommodating cavity and is connected the center mounting hole of fixed cover through support bearing, and the cover body of rotary cover is connected the axle body left end face through thread and its inner link column inserts the wire passing cavity left end of axle body, the outer ring sleeve mounting hole outer end of support bearing and the inner ring are equipped with the hinge link section outer end, and the shaft shoulder of two sides of outer ring is combined with the outer partition ring of outer partition board, and the outer wall of inner ring is combined with outer stop shoulder, and the wire of several circuit assembly's inner end is stacked and is wrapped axle body and is stacked and is wrapped the base ring of outer end. The utility model has the effect of protecting cable, connecting reliable and long service life.

Description

Technical Field

[0001] This utility model relates to the field of connectors, and in particular to a novel resolver connector. Background Technology

[0002] The robotics industry is developing rapidly, and rotary connectors are a crucial component of robot joints. Rotary connectors enable rotational movement of the connected parts and, through their internal integrated circuits, transmit electrical energy or signals. Currently, the cables within rotary connectors are freely suspended, with one end connected to the rotating end and the other directly connected to the fixed end. The problems are twofold: First, during operation, the cables may be repeatedly and forcefully pulled or twisted, leading to damage or even failure, thus reducing lead and transmission performance, resulting in lower reliability and shorter product lifespan. Second, due to the cable placement, the overall structural size of the joint is relatively large, making it unsuitable for miniaturized applications with limited internal space. Utility Model Content

[0003] To address one or more of the above problems, this utility model provides a novel resolver connector.

[0004] According to one aspect of the present invention, the novel resolver connector includes:

[0005] The fixed base includes a fixed cover and a fixed shell and an outer partition plate that are fixedly connected to the left and right ends of the fixed cover by threaded parts. The fixed cover and the fixed shell surround and form a receiving cavity.

[0006] The rotating seat includes a hollow shaft and a seat body integrally connected to one side of the shaft. The seat body is connected to the outer limiting plate of the fixed shell through limiting balls. The shaft passes through the first through hole into the receiving cavity, and the hinged section at the end of the shaft passes through the center mounting hole of the fixed cover.

[0007] Rotary cover, the cover body of the rotary cover is threadedly connected to the left end face of the shaft and the inner connecting column sleeve shaft is at the left end of the through cavity;

[0008] The support bearing has an outer ring bushing at the outer end of the mounting hole and an inner ring bushing at the outer end of the hinged section. The outer ring has shoulders on both sides that fit into the mounting hole and outer spacer rings of the outer partition plate. The outer wall of the inner ring fits into the outer shoulder.

[0009] The circuit assembly includes a cable disposed in the receiving cavity, a first connector in the middle of the connecting base, and a second connector on the side of the connecting fixed base. The inner ends of several ribbon cables of the cable are stacked and wrapped around the shaft, and the outer ends are stacked and wrapped around the base ring.

[0010] In some embodiments, the center of the fixed cover protrudes outward to form a hinge block, the mounting hole penetrates the hinge block, and the outer ring is fitted with the inner bearing hole at the outer end of the mounting hole and fits the adjacent shaft shoulder.

[0011] In some embodiments, an outer bearing hole is formed at the inner end of the center of the outer partition plate and an outer spacer ring is formed at the outer end of the center. The outer bearing hole and the inner bearing hole have the same diameter and are connected to form a bearing hole. The outer end of the outer ring is fitted with the outer bearing hole and fits against the adjacent shaft shoulder.

[0012] In some embodiments, the rotating cover includes a disc cover body and an inner connecting post integrally coaxially connected to one end of the cover body. The outer side of the cover body is an outer shoulder and the inner side is an inner hinge section with the same diameter as the hinge section. The inner hinge section and the hinge section are connected front and rear to form a hinge shaft. The power output end of the actuator is threadedly connected to the outer wall of the rotating cover.

[0013] In some embodiments, an inner spacer ring is also included, with a hinged section fitted between the inner spacer ring and the hinged section. The inner end of the inner spacer ring is in contact with the adjacent shoulder of the hinged section, and the outer end is in contact with the inner ring.

[0014] In some embodiments, the base ring of the fixed shell is provided with a positioning groove at the front end, and the front end of the fixed cover is provided with an arc-shaped positioning protrusion, which is engaged with the positioning groove.

[0015] In some embodiments, a receiving groove is also formed in the center of the inner wall of the fixed cover, and the circuit assembly also includes a wire fixing plate located in the receiving groove, with the end ring of the wire fixing plate sleeved on the positioning section of the shaft and the subsequent claw engaging the groove of the shaft.

[0016] The cable is located between the end ring and the limiting block of the base. The inner end of the cable passes through the hole of the shaft and is electrically connected to the first connector, while its outer end passes through the hole of the base ring of the fixing ring and is electrically connected to the second connector.

[0017] In some implementations, the cabling is an FFC cabling with equally spaced reverse bends in the middle.

[0018] In some embodiments, the first connector includes a first power connection portion and a first signal connection portion, and the second connector includes a second power connection portion and a second signal connection portion;

[0019] Each power connector includes a power housing and multiple power pins integrally injection molded and connected within the power housing. The power housing is connected to a power plastic shell via a snap-fit. Each signal connector includes a signal housing and multiple signal pins integrally injection molded and connected within the signal housing. The signal housing is snap-fit ​​connected to a signal plastic shell.

[0020] In some implementations, two FFC cables pass through the cable port of the power supply housing and are soldered with a power PIN pin, and one FFC cable passes through the cable port of the signal housing and is soldered with a row of multiple signal PIN pins; both the power supply housing and the signal housing have positioning pins at their cable ports.

[0021] This novel resolver connector, applied to robot joints, offers several advantages: First, the rotating seat is housed within the fixed seat's cavity, and the two are rotatably connected via a support bearing. The overall structure is compact and small in size, making it suitable for compact environments. Second, the support bearing between the two seats is precisely positioned and equipped with limiting balls to ensure rotational accuracy. This allows for good relative rotation with high precision and minimal deviation, facilitating quantitative cable laying or winding, preventing cable interference or pulling, and ensuring reliable connection. Third, the cable employs a winding structure, ensuring effective and controllable internal cable winding, preventing mutual interference and damage. This guarantees high-precision lead and transmission performance over the long term, resulting in high reliability, long product lifespan, and a small overall size, making it suitable for compact environments. Fourth, the use of FFC cabling provides excellent dynamic bending performance, capable of millions of cycles. Furthermore, the flexible bending of the FFC cabling in this circuit structure further prevents cable damage. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of a novel resolver connector according to one embodiment of the present invention.

[0023] Figure 2 for Figure 1 A cross-sectional schematic diagram of the novel resolver connector shown.

[0024] Figure 3 for Figure 2 A cross-sectional view of the mounting bracket shown;

[0025] Figure 4 for Figure 3 A three-dimensional schematic diagram (I) of the fixed base shown;

[0026] Figure 5 for Figure 3 A three-dimensional schematic diagram (II) of the fixed base shown;

[0027] Figure 6 for Figure 2 A cross-sectional schematic diagram of the rotating base shown;

[0028] Figure 7 for Figure 6 A three-dimensional schematic diagram of the rotating base shown;

[0029] Figure 8 for Figure 2 A three-dimensional schematic diagram of the second connector shown;

[0030] Fixed base 1, fixed cover 11, hinge block 110, mounting hole 111, inner bearing hole 112, positioning protrusion 113, receiving groove 114, fixed shell 12, outer limiting plate 120, first through hole 121, base ring 122, positioning groove 123, circumferential track 124, locking hole 125, outer partition plate 13, outer bearing hole 130, outer spacer ring 131, lug shell 14;

[0031] Rotary seat 2, shaft 20, through-line cavity 200, radial connecting hole 201, positioning section 202, hinge section 203, slot 204, seat 21, radial pulling hole 210, locking groove 211, limiting block 22.

[0032] Rotating cover 3, cover body 30, inner connecting post 31, outer shoulder 32, central shaft hole 33;

[0033] Support bearing 4;

[0034] Circuit component 5, cable 50, ribbon cable 500, first connector 51, second connector 52, wire fixing plate 53, end ring 530, rear claw 531, power supply plastic shell 54, power supply housing 55, signal plastic shell 56, signal housing 57, positioning post 58.

[0035] 6. Inner spacer ring; 7. Limiting ball; 8. Zero-marking locking plate. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to the directions in the accompanying drawings, while the terms "inner" and "outer" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0037] Figures 1 to 8 A novel resolver connector according to one embodiment of the present invention is schematically shown. As shown, the novel resolver connector includes:

[0038] The fixing base 1 includes a fixing cover 11 and a fixing shell 12 and an outer partition 13 that are fixedly connected to the left and right ends of the fixing cover 11 by threaded parts. The fixing cover 11 and the fixing shell 12 surround to form a receiving cavity. The outer limiting plate 120 of the fixing shell 12 is provided with a first through hole 121 in the center, and the fixing cover 11 is provided with a central through mounting hole 111.

[0039] The rotating seat 2 includes a hollow shaft 20 and a seat 21 integrally connected to one side of the shaft 20. The shaft 20 has a hinge section 203 at its end. The seat 21 is connected to an outer limiting plate 120 via limiting balls 7. The shaft 20 passes through the first through hole 121 into the receiving cavity, and the hinge section 203 is coaxially fitted through the mounting hole 111.

[0040] Rotating cover 3, the cover body 30 of rotating cover 3 is threadedly connected to the left end face of shaft 20 and its inner connecting post 31 is inserted into the left end of the through cavity 200 of shaft 20;

[0041] Support bearing 4, the outer ring of support bearing 4 is fitted with the outer end of the mounting hole 111 and the inner ring is fitted with the outer end of the hinge section 203, the two sides of the outer ring are fitted with the shaft shoulder of the mounting hole 111 and the outer spacer ring 131 of the outer partition plate 13, and the outer wall of the inner ring is fitted with the outer shoulder 32.

[0042] The circuit assembly 5 includes a cable 50 disposed in the receiving cavity, a first connector 51 in the middle of the connecting base 21, and a second connector 52 connected to the side end of the fixing base 1. Several flexible ribbon cables 500 of the cable 50 have their inner ends stacked around the shaft 20 and their outer ends stacked around the base ring 122. The ribbon cables 500 are preferably FFC ribbon cables, with equally spaced reverse bending sections in the middle. When the shaft 20 rotates, multiple FFC ribbon cables 500 can be simultaneously and gradually rolled up or gradually laid out.

[0043] This novel resolver connector, applied to robot joints, offers several advantages: First, the rotating seat 2 is housed within the cavity of the fixed seat 1, and the two are rotatably connected via a support bearing 5. The overall structure is compact and small in size, making it suitable for compact applications. Second, the support bearing 5 between the two seats is precisely positioned and equipped with limiting balls 7 to ensure rotational accuracy. This allows for good relative rotation with high precision and minimal deviation, facilitating the quantitative laying or winding of the cable 5, preventing interference or pulling, and ensuring reliable connection. Third, the cable 5, with its winding structure, allows for effective and controllable internal cable winding, preventing mutual interference and damage. This ensures long-term high-precision lead and transmission performance, high reliability, long product lifespan, and a small overall size, making it suitable for compact applications. Fourth, the use of FFC cables, which have excellent dynamic bending performance capable of millions of cycles, further enhances the cable's flexibility and prevents damage.

[0044] Furthermore, a hinge block 110 is integrally formed by protruding outward from the center outer side of the fixed cover 11. The mounting hole 111 penetrates the hinge block 110, and a large-diameter inner bearing hole 112 is formed at the outer end of the mounting hole 111. The outer ring is fitted with the inner bearing hole 112 and fits against the adjacent shaft shoulder. Preferably, the outer partition 13 is threaded to the outer wall of the hinge block 110. The inner center of the outer partition 13 forms an outer bearing hole 130, and the outer center of the outer partition 13 forms an outer spacer ring 131. The outer bearing hole 130 and the inner bearing hole 112 have the same diameter and are connected to form a bearing hole. The annular hole of the outer spacer ring 131 is the same as the inner end of the mounting hole 111. The outer ring is fitted with the outer bearing hole 130 and fits against the adjacent shaft shoulder. Preferably, the rotating cover 3 includes a disc cover body 30 and an inner connecting post 31 integrally coaxially connected to one end of the cover body 30. The outer side of the cover body 30 is an outer shoulder 32, and the inner side is an inner hinge section with the same diameter as the hinge section 203. The inner hinge section and the hinge section 203 are connected front and rear to form a hinge shaft. The outer wall of the rotating cover 3 is threaded to the power output end of the actuator, and its central shaft hole 33 is sleeved with the positioning post of the power output end. Preferably, it also includes an inner spacer ring 6, which is spaced between the inner end of the hinge section 203 and the inner end of the mounting hole 111. The inner end of the inner spacer ring 6 fits against the adjacent shoulder of the hinge section 203, and the outer end fits against the inner ring. Its beneficial effects are: this setting adds a freely rotating ring, which can reduce friction, ensure high-precision positioning of the support bearing 4, improve rotational accuracy, and further optimize the product volume.

[0045] Preferably, the base ring 122 of the fixed shell 12 has a positioning groove 123 at its front end, and the fixed cover 11 has an arc-shaped positioning protrusion 113 at its front end, with the positioning protrusion 113 engaging with the positioning groove 123. The advantage of this design is that it facilitates high-precision assembly.

[0046] Furthermore, a receiving groove 114 is formed in the center of the inner wall of the fixed cover 11, and the circuit assembly 5 also includes a wire fixing plate 53 located in the receiving groove 114. The end ring 530 of the wire fixing plate 53 is sleeved on the positioning section 202 of the shaft 20, and its several rear claws 531 engage with the slots 204 of the shaft 20.

[0047] Cable 50 is located between end ring 530 and limiting block 22 of base 21. The inner end of cable 50 passes through the hole of shaft 20 and is electrically connected to first connector 51, while its outer end passes through the hole of base ring 122 of fixing ring 12 and is electrically connected to second connector 52. The advantages of this arrangement are: it facilitates ensuring the installation position of the cable, prevents the cable from falling off, avoids interference caused by cable swaying during movement, and achieves good cable laying and unlaying work.

[0048] Furthermore, the first connector 51 is fixed outside the center of the base 21 and its first inner lead end enters the through cavity 200 of the shaft 20. The second connector 52 is installed in the ear shell 14 on the side of the fixed shell 1, and its second inner lead end is exposed in the cavity of the ear shell 14.

[0049] The outer wall of the through cavity 200 of the shaft 20 is provided with a radial connecting hole 201. The inner end of the ribbon cable 50 passes through the through cavity 200 of the shaft 20 and is electrically connected to the PIN pin. The outer end of the ribbon cable 50 passes through the through hole 121 of the base ring 122 and enters the ear shell 14 cavity and is electrically connected to the PIN pin. Preferably, the first connector 51 includes a first power connection portion and a first signal connection portion, and the second connector 52 includes a second power connection portion and a second signal connection portion. Each power connection portion includes a power housing 55 and multiple power pins integrally injection molded and connected within the power housing 55. The multiple power pins are interconnected by an interference fit with a boss. The power housing 55 is snap-fit ​​connected to a power plastic shell 54, which is inserted into the power port at the center of the base 21 or the power port of the earpiece 14. Each signal connection portion includes a signal housing 57 and multiple signal pins integrally injection molded and connected within the signal housing 57. The multiple signal pins are interconnected by an interference fit with a boss. The signal housing 57 is snap-fit ​​connected to a signal plastic shell 56, which is inserted into the signal port at the center of the base 21 or the signal port of the earpiece 14. The advantages are: this configuration facilitates the routing and connection of the wiring, and assembly is convenient and quick.

[0050] Furthermore, two FFC cables 500 pass through the cable port of the power supply housing and are soldered with a power PIN pin, and one FFC cable 500 passes through the cable port of the signal housing 57 and is soldered with a row of multiple signal PIN pins; the cable port of the power supply housing 55 is provided with a positioning post 58 and a buckle; the cable port of the signal housing 57 is provided with a positioning post 58 and a buckle to avoid the stress point of the FFC cable 500 being at the solder joint.

[0051] Furthermore, the inner end of the base 21 is provided with a radial pull hole 210, and the outer limiting plate 120 is provided with multiple interconnected circumferential tracks 124. The gap between the inner and outer limiting plates 120 of the base 21 is opposite, and the inner end of the limiting ball 7 is rolledly connected to the circumferential track 124 and the outer end is rolledly connected to the radial pull hole 210. Its beneficial effects are: the rotation limiting channel composed of the circumferential channel and the radial channel 21 can accurately limit the axial, radial and circumferential directions of the limiting ball, realize precise rotation, thereby ensuring the robot's motion accuracy. Moreover, the limiting ball 7 can rotate safely within the circumferential channel and will not run beyond the channel, thus avoiding over-angle rotation, effectively protecting the cable 5, ensuring high connection reliability and long product life. The limiting ball 7 adopts a rolling connection, with low resistance, and can achieve better jam-free limiting rotation.

[0052] Furthermore, it also includes a zero-marking locking piece 8, a base 21 with a locking groove 211 and a moving mark, and a base ring 122 with a locking hole 125 and a fixed mark. When the moving mark and the fixed mark are aligned, the locking groove 211 is aligned with the locking hole 125, and the front end of the zero-marking locking piece 8 passes through the locking groove 211 and is inserted into the locking hole 125 with an interference fit.

[0053] Preferably, the zero-locking plate 8 includes an operating handle and a locking plate integrally formed at the front end of the operating handle. The rear end of the locking plate has a lower locking platform that cooperates with the locking groove 211, and the front end has an elastic end with a through hole. The elastic end has a front locking platform to prevent it from falling off. Its advantages are: this setting facilitates operation and use, achieves high-precision operation, and avoids cumulative errors.

[0054] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A novel resolver connector, characterized in that, include: The fixed base (1) includes a fixed cover (11) and a fixed shell (12) and an outer partition (13) that are fixedly connected to the left and right ends of the fixed cover (11) by threaded parts. The fixed cover (11) and the fixed shell (12) surround and form a receiving cavity. Rotary seat (2), the rotary seat (2) includes a hollow shaft (20) and a seat (21) integrally connected to one side of the shaft (20). The seat (21) is connected to the outer limiting plate (120) of the fixed shell (12) through the limiting ball (7). The shaft (20) passes through the first through hole (121) into the receiving cavity and the hinge section (203) at the end of the shaft (20) is coaxially fitted through the center mounting hole (111) of the fixed cover (11). Rotating cover (3), the cover body (30) of the rotating cover (3) is threaded to the left end face of the shaft (20) and its inner connecting post (31) is inserted into the left end of the through cavity (200) of the shaft (20); Support bearing (4), the outer ring of the support bearing (4) is fitted with the outer end of the mounting hole (111) and the inner ring is fitted with the outer end of the hinge section (203), the two sides of the outer ring are fitted with the shoulder of the mounting hole (111) and the outer spacer (131) of the outer partition plate (13), and the outer wall of the inner ring is fitted with the outer shoulder (32). The circuit assembly (5) includes a cable (50) disposed in the receiving cavity, a first connector (51) in the middle of the connecting seat (21) and a second connector (52) on the side of the connecting fixing seat (1). The inner ends of several ribbon cables (500) of the cable (50) are stacked around the shaft (20) and the outer ends are stacked around the base ring (122).

2. The novel resolver connector according to claim 1, characterized in that, The fixed cover (11) integrally protrudes outward to form a hinge block (110) at the center. The mounting hole (111) passes through the hinge block (110), and the outer ring is fitted with the inner bearing hole (112) at the outer end of the mounting hole (111) and fits the adjacent shaft shoulder.

3. The novel resolver connector according to claim 2, characterized in that, The outer diaphragm (13) has an outer bearing hole (130) at its inner center and an outer diaphragm ring (131) at its outer center. The outer bearing hole (130) and the inner bearing hole (112) have the same diameter and are connected to form a bearing hole. The outer ring is fitted with the outer bearing hole (130) at its outer end and fits against the adjacent shaft shoulder.

4. The novel resolver connector according to claim 3, characterized in that, The rotating cover (3) includes a disc cover body (30) and an inner connecting post (31) that is coaxially connected to one end of the cover body (30). The outer side of the cover body (30) is an outer shoulder (32) and the inner side is an inner hinge section with the same diameter as the hinge section (203). The inner hinge section and the hinge section (203) are connected front and rear to form a hinge shaft. The power output end of the actuator is threaded to the outer wall of the rotating cover (3).

5. The novel resolver connector according to any one of claims 1 to 4, characterized in that, It also includes an inner spacer ring (6), which is fitted with a hinged section (203) with a gap. The inner end of the inner spacer ring (6) is in contact with the adjacent shoulder of the hinged section (203) and the outer end is in contact with the inner ring.

6. The novel resolver connector according to claim 5, characterized in that, The base ring (122) of the fixed shell (12) is provided with a positioning groove (123) at the front end, and the fixed cover (11) is provided with an arc-shaped positioning protrusion (113) at the front end, and the positioning protrusion (113) is connected to the positioning groove (123).

7. The novel resolver connector according to claim 5, characterized in that, The center of the inner wall of the fixed cover (11) also forms a receiving groove (114), and the circuit assembly (5) also includes a wire fixing plate (53) located in the receiving groove (114). The end ring (530) of the wire fixing plate (53) is sleeved on the positioning section (202) of the shaft (20), and the claw (531) thereafter engages with the slot (204) of the shaft (20). The cable (50) is located between the end ring (530) and the limiting block (22) of the seat (21). The inner end of the cable (50) passes through the hole of the shaft (20) and is electrically connected to the first connector (51), and its outer end passes through the hole of the base ring (122) of the fixing ring (12) and is electrically connected to the second connector (52).

8. The novel resolver connector according to claim 7, characterized in that, The cable (500) is an FFC cable, with equally spaced reverse bends in the middle.

9. The novel resolver connector according to claim 8, characterized in that, The first connector (51) includes a first power connection part and a first signal connection part, and the second connector (52) includes a second power connection part and a second signal connection part; Each of the power connection parts includes a power housing (55) and a plurality of power pins integrally injection molded and connected within the power housing (55), the power housing (55) being connected to the power plastic shell (54) by a snap-fit; each of the signal connection parts includes a signal housing (57) and a plurality of signal pins integrally injection molded and connected within the signal housing (57), the signal housing (57) being snap-fit ​​connected to the signal plastic shell (56).

10. The novel resolver connector according to claim 5, characterized in that, Two FFC cables (500) pass through the wire port of the power housing and are soldered with a power PIN pin. One FFC cable (500) passes through the wire port of the signal housing (57) and is soldered with a row of multiple signal PIN pins. The cable ports of both the power housing (55) and the signal housing (57) are provided with positioning posts (58).

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