CN117803692A - Internal circulation screw-nut assembly and transmission system - Google Patents
Internal circulation screw-nut assembly and transmission system Download PDFInfo
- Publication number
- CN117803692A CN117803692A CN202410228707.1A CN202410228707A CN117803692A CN 117803692 A CN117803692 A CN 117803692A CN 202410228707 A CN202410228707 A CN 202410228707A CN 117803692 A CN117803692 A CN 117803692A
- Authority
- CN
- China
- Prior art keywords
- channel
- spiral
- nut
- screw
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 20
- 238000005096 rolling process Methods 0.000 claims abstract description 10
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 15
- 238000009434 installation Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Transmission Devices (AREA)
Abstract
The invention belongs to the technical field of screw rods, and discloses an internal circulation screw rod nut assembly and a transmission system, wherein the internal circulation screw rod nut assembly comprises a screw rod component and a nut, and a spiral channel is formed between the screw rod component and the nut; an inner cavity hole is formed in the screw rod member, an inner circulation member is mounted in the inner cavity hole, an inner channel is formed in the inner circulation member, and two sections of the inner channel are respectively communicated with the spiral channel to form a circulation channel for rolling balls; the adopted internal circulation mechanism enables the balls to roll in the circulation channel formed by the cooperation of the screw rod and the nut, so that the overall size of the nut is reduced, the requirement on small-size transmission can be met, the diameter size of the nut is effectively reduced, the nut can be designed to be more compact, meanwhile, the bearing capacity and the application flexibility of the screw rod are improved due to the characteristic of no lead limitation, the application range is improved, the cooperation precision between the screw rod and the nut is improved due to the existence of the internal circulation component, and the transmission efficiency and the operation stability are further improved.
Description
Technical Field
The invention relates to the technical field of screw rods, in particular to an internal circulation screw rod nut assembly and a transmission system.
Background
Ball screw technology plays a vital role in the field of modern mechanical design and automation, and is mainly used for converting rotary motion into linear motion or vice versa, and is widely applied to various precision equipment, robots, numerical control machine tools and other high-precision positioning systems. The ball screw has a smaller friction coefficient and higher transmission efficiency compared with the traditional screw transmission mode due to the high-efficiency and accurate transmission characteristic.
The existing ball screw technology has the structure that steel balls are usually circulated in a steel ball groove in the nut or through a reverser, and the design enables the nut to continuously rotate and the steel balls to continuously circulate, so that stable movement and higher transmission efficiency are realized; however, this technology has some limitations, firstly, since the steel balls circulate in the nut, this limits the minimum size and design flexibility of the nut, resulting in that the diameter of the nut tends to be larger, which is not beneficial to the application scenarios of some screw drive pairs, such as smaller size of the connection structure of the nut member, unsuitable for installing the nut with larger diameter, and affects the load capacity and application range of the ball screw.
In view of this, there is a need to improve the ball screw solution in the prior art to solve the technical problem that the structural diameter of the nut member is large, which is not beneficial to installation.
Disclosure of Invention
The invention aims to provide an internal circulation screw-nut assembly and a transmission system, which solve the technical problems.
To achieve the purpose, the invention adopts the following technical scheme:
an internally circulated screw-nut assembly comprising a screw member and a nut, a helical channel being formed between the screw member and the nut;
an inner cavity hole is formed in the screw rod member, an inner circulation member is arranged in the inner cavity hole, an inner channel is formed in the inner circulation member, and two sections of the inner channel are respectively communicated with the spiral channel to form a circulation channel for rolling balls;
the screw rod component is provided with a through hole in a penetrating manner along the length direction, and two side connecting holes are arranged at preset positions of the through hole;
the internal circulation component comprises a main body component, and a positive connecting piece and a negative connecting piece which are respectively arranged at two ends of the main body component; the positive connecting piece and the reverse connecting piece are respectively arranged in the corresponding side connecting holes;
the main part component has seted up first passageway along its length direction, positive connecting piece is interior to have seted up and is curved second passageway, the interior third passageway that is curved that has seted up of anti-connecting piece, first passageway the second passageway with be formed with between the third passageway the interior passageway.
Optionally, a first spiral groove is formed in the outer side wall of the screw rod member, and the cross section of the first spiral groove along the spiral line of the first spiral groove is semicircular;
the inner side wall of the nut is provided with a second spiral groove, and the second spiral groove is matched with the first spiral groove to form the spiral channel.
Optionally, the central axis length of the first spiral groove is smaller than the central axis length of the second spiral groove;
two sections of the second spiral groove are respectively provided with a limiting part, and the limiting parts are used for preventing balls in the circulating channel from overflowing; such that a difference between a central axis length of the second helical groove and a central axis length of the first helical groove is a sliding stroke of the lead screw nut assembly.
Optionally, the two side connecting holes are respectively penetrating through the side wall of the screw rod member, and the two side connecting holes are respectively arranged at two opposite side parts of the screw rod member;
the inner cavity hole is formed on the hole sections of the two side connecting holes and the through hole between the two side connecting holes.
Optionally, the positive connection piece comprises a first member and a second member, and the second member is attached to the inner side wall of the side connection hole;
an arc-shaped connecting part is arranged at one side part of the first component, which is close to the second component, and the arc-shaped connecting part protrudes out of the first component;
an arc-shaped groove is formed in one side part of the second component, which is close to the first component, and the arc-shaped connecting part is arranged in the arc-shaped groove;
a first spiral half groove which is spiral is formed in one side portion of the arc-shaped connecting portion, a second spiral half groove is formed in the second component, and the first spiral half groove and the second spiral half groove are matched to form the first channel.
Optionally, a first connecting part is arranged on the lower end surface of the positive connecting piece, and the first connecting part comprises a plane part and a curved surface part which are integrally arranged;
the upper end face of the main body member is provided with a second connecting part, and the second connecting part is an arc-shaped curved surface which is gradually and upwards inclined along the first direction;
wherein, first connecting portion laminating in the setting of second connecting portion.
Optionally, an end of the second member is provided with a protrusion having an outer surface and an inner surface;
the outer surface is a curved surface matched with the outer side wall of the screw rod member, the inner surface is connected with one section of the second spiral half groove, and the inner surface is used for limiting the rolling of the balls.
The invention also provides a transmission system comprising the internally circulated lead screw nut assembly as described above.
Compared with the prior art, the invention has the following beneficial effects: during operation, the screw rod component and the nut are assembled together, a spiral channel is formed between the screw rod component and the nut, the spiral channel is used as an outer channel for rolling balls, the main body component is installed along the through hole of the screw rod component, the positive connecting piece and the negative connecting piece are respectively installed through the corresponding side connecting holes, the installation of the inner circulating component is realized, the spiral channel is communicated with the inner channel, and the inner channel and the outer channel are matched to form a circulating channel; in the moving process of the screw rod, the nut linearly slides relative to the screw rod to drive the balls in the spiral channel to roll and circularly roll along the inner channel, so that screw rod transmission is realized; the internal circulation mechanism adopted by the screw-nut assembly enables the balls to roll in the circulation channel formed by the cooperation of the screw and the nut, so that the overall size of the nut is reduced, the requirement on small-size transmission can be met, the diameter size of the nut is effectively reduced, the nut can be designed to be more compact, and meanwhile, the bearing capacity and the application flexibility of the screw are improved due to the characteristic of no lead limitation; the internal circulation component is particularly suitable for application scenes with limited space or small-sized installation design, the application range is improved, and the existence of the internal circulation component is beneficial to improving the matching precision between the screw rod and the nut, so that the transmission efficiency and the operation stability are improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are not intended to limit the scope of the invention, since any modification, variation in proportions, or adjustment of the size, etc. of the structures, proportions, etc. should be considered as falling within the spirit and scope of the invention, without affecting the effect or achievement of the objective.
Fig. 1 is an overall schematic view of a lead screw nut assembly according to a first embodiment;
fig. 2 is a schematic view showing an exploded structure of a lead screw nut assembly according to the first embodiment;
fig. 3 is a schematic cross-sectional view of a screw nut assembly according to the first embodiment;
fig. 4 is a schematic cross-sectional structure of a screw member of the screw nut assembly of the first embodiment;
fig. 5 is a schematic structural view of an internal circulation member of the screw nut assembly of the first embodiment;
fig. 6 is a schematic cross-sectional structure of an inner circulation member of the lead screw nut assembly of the first embodiment;
fig. 7 is a schematic structural view of a main body member and a counter connector of the screw nut assembly according to the first embodiment;
fig. 8 is a schematic view of a circulation passage of the screw nut assembly of the first embodiment;
fig. 9 is a schematic structural view of a positive connection member of the screw nut assembly of the first embodiment.
Illustration of: the screw rod member 1, the nut 2, the screw passage 3, the inner cavity hole 4, the inner circulation member 5, the inner passage 6, the balls 7, the circulation passage 8, the first screw groove 9, the second screw groove 10, the stopper 11, the through hole 12, the side connection hole 13, the main body member 14, the forward connection piece 15, the reverse connection piece 16, the first passage 17, the second passage 18, the third passage 19, the first member 20, the second member 21, the arc connection portion 22, the arc groove 23, the first screw half groove 24, the second screw half groove 25, the first connection portion 26, the flat portion 27, the curved portion 28, the second connection portion 29, the protruding portion 30, the outer surface 31, and the inner surface 32.
Detailed Description
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. It is noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
Embodiment one:
referring to fig. 1 to 9, an embodiment of the present invention provides an internally circulated screw-nut assembly including a screw member 1 and a nut 2, a screw passage 3 being formed between the screw member 1 and the nut 2; an inner cavity hole 4 is formed in the screw rod member 1, an inner circulation member 5 is mounted in the inner cavity hole 4, an inner channel 6 is formed in the inner circulation member 5, and two sections of the inner channel 6 are respectively communicated with the spiral channel 3 to form a circulation channel 8 for rolling balls 7. As shown in fig. 8, the circulation track formed by the balls 7 is a circulation passage 8.
The screw rod member 1 is provided with a through hole 12 in a penetrating manner along the length direction, and two side connecting holes 13 are arranged at preset positions of the through hole 12; the inner circulation member 5 includes a main body member 14, and a positive connection member 15 and a negative connection member 16 provided at both ends of the main body member 14, respectively; the positive connection piece 15 and the negative connection piece 16 are respectively installed in the corresponding side connection holes 13; and the positive connection 15 and the negative connection 16 have the same structure, but different arrangement positions and orientations.
The main body member 14 is provided with a first channel 17 along the length direction thereof, the positive connecting piece 15 is internally provided with a second channel 18 which is arc-shaped, the inverse connecting piece 16 is internally provided with a third channel 19 which is arc-shaped, and an inner channel 6 is formed among the first channel 17, the second channel 18 and the third channel 19.
It should be noted that, in the present solution, the inner circulation member 5 is divided into three parts to be assembled on the screw rod member 1, specifically, the main body member 14 is first inserted into a preset position along the through hole 12, and then the positive connection piece 15 and the negative connection piece 16 are respectively inserted into the corresponding side connection holes 13, so that two ends of the main body member 14 are respectively blocked and limited by the positive connection piece 15 and the negative connection piece 16, thereby realizing the assembly of the inner circulation member 5; the inner channel inside the screw rod member 1 is required to be built in the scheme, so that the whole structure of the screw rod member 1 is prevented from being damaged, and the inner circulation member 5 is installed in a split type assembly mode.
The working principle of the invention is as follows: during operation, the screw rod component 1 and the nut 2 are assembled together, a spiral channel 3 is formed between the screw rod component 1 and the nut, the spiral channel 3 is used as an outer channel for rolling of the ball 7, and an inner circulation component 5 is arranged in an inner cavity hole 4 of the screw rod component 1, so that the spiral channel 3 is communicated with the inner channel 6, and the inner channel and the outer channel are matched to form a circulating channel 8; in the moving process of the screw rod, the nut 2 slides linearly relative to the screw rod to drive the ball 7 positioned in the spiral channel 3 to roll and circularly roll along the inner channel 6, so that screw rod transmission is realized; the internal circulation mechanism adopted by the screw-nut assembly enables the balls 7 to roll in the circulation channel 8 formed by the cooperation of the screw and the nut 2, so that the overall size of the nut 2 is reduced, and the requirement on small-size transmission can be met; the internal circulation component 5 is particularly suitable for application scenes with limited space or small-sized installation design, the application range is improved, the matching precision between the screw rod and the nut 2 is improved due to the internal circulation component 5, and the transmission efficiency and the operation stability are improved.
In the embodiment, a first spiral groove 9 is formed on the outer side wall of the screw rod member 1, and the cross section of the first spiral groove 9 along the spiral line is semicircular; the first spiral groove 9 is formed on the outer side wall of the screw member 1 and has a semicircular cross section. This semi-circular shape provides a smooth rolling path for the balls 7, reducing friction and wear, while also ensuring stability of the balls 7 during movement.
The inner side wall of the nut 2 is provided with a second spiral groove 10, and the second spiral groove 10 is matched with the first spiral groove 9 to form a spiral channel 3. The cooperation of the first spiral groove 9 and the second spiral groove 10 not only allows the balls 7 to move smoothly in the spiral channel 3, but also further reduces the size of the whole system, namely the thickness of the nut 2 only needs to be larger than the radius size of the balls 7, instead of the size design that the external circulation of the nut 2 in the prior art needs to be larger than the diameter of the whole balls 7; thereby effectively reducing the diameter size of the nut 2.
Further illustratively, the central axis length of the first helical groove 9 is less than the central axis length of the second helical groove 10; two sections of the second spiral groove 10 are respectively provided with a limiting part 11, and the limiting parts 11 are used for blocking the balls 7 in the circulation channel 8 from overflowing; so that the difference between the central axis length of the second helical groove 10 and the central axis length of the first helical groove 9 is the sliding stroke of the lead screw nut assembly.
By making the central axis length of the first helical groove 9 smaller than the central axis length of the second helical groove 10, it is ensured that the helical channel 3 can be formed entirely within the nut 2, while also defining the maximum sliding travel of the die set. That is, the sliding formation of the screw rod in this solution is determined by the length of the nut 2, it can be understood that the length of the screw rod member 1 with the balls 7 is generally smaller, and the length of the nut 2 is set larger, so that the accuracy of the nut 2 is higher, and the nut 2 does not need to be provided with more apertures to affect the machining accuracy, thereby improving the overall accuracy of the screw-nut assembly.
The limiting part 11 at the end part of the second spiral groove 10 effectively prevents the ball 7 from overflowing when reaching the travel limit, thereby protecting the screw rod and the nut 2 and ensuring the long-term stable operation of the system; this design allows the balls 7 to move smoothly within a certain stroke without causing overflow of the balls 7 due to the limited stroke of the screw.
In this embodiment, as shown in fig. 4, the screw member 1 in this embodiment is a hollow screw, which is provided with a through hole 12, and a side connecting hole 13 is provided on a side wall thereof, so as to form a "zigzag" hole pattern structure; the purpose of the through holes 12 is to facilitate the insertion and installation of the inner circulation member 5.
The arrangement of the side connecting holes 13 not only plays a role of connecting the inner and outer channels, but also provides great convenience for assembly and maintenance; for example, the operation can be performed through the side connection hole 13 when the inner circulation member 5 is assembled or replaced. In addition, the design can realize effective management and control of the internal circulation channel on the premise of not influencing the strength of the screw rod, thereby ensuring smooth operation of the ball 7 in the circulation process.
Specifically, the main body member 14 is a core portion of the inner circulation member 5, and a first passage 17 is provided along a length direction thereof. This channel serves as a main path for the balls 7 to circulate inside the screw, ensuring smooth movement of the balls 7 and reducing internal friction. The design of the body member 14 directly affects the efficiency and reliability of the overall lead screw nut assembly.
The positive and negative connection members 15 and 16 are provided at both ends of the body member 14, respectively, and are installed in the corresponding side connection holes 13. The two connecting pieces are internally provided with a second channel 18 and a third channel 19 which are arc-shaped and are connected with the first channel 17 of the main body member 14 to form a continuous inner channel 6; the arcuate channel design of the positive 15 and negative 16 connectors helps to smoothly guide the turning of the balls 7 during the internal circulation, thereby reducing impact and wear at the turning and increasing the durability of the system.
Further, the positive connection piece 15 includes a first member 20 and a second member 21, and the second member 21 is attached to the inner side wall of the side connection hole 13; the mounting smoothness of the positive link 15 during the mounting process is increased.
An arc-shaped connecting part 22 is arranged at one side part of the first member 20, which is close to the second member 21, and the arc-shaped connecting part 22 protrudes from the first member 20; the first member 20 is provided with an arc-shaped connecting portion 22 which protrudes from the first member 20 and is close to the second member 21; the design of the arcuate connection 22 is critical in providing a smooth transition point which helps reduce collisions and friction as the ball 7 transitions from the body member 14 into the positive connection 15, thereby improving the operational efficiency and durability of the overall system.
An arc-shaped groove 23 is formed in one side part of the second member 21, which is close to the first member 20, and an arc-shaped connecting part 22 is arranged in the arc-shaped groove 23; the second member 21 is provided with an arc-shaped groove 23 for accommodating the arc-shaped connecting part 22, and the matching design of the arc-shaped connecting part 22 and the arc-shaped groove 23 is fit with the spiral track design of the ball 7 channel on one hand, and is beneficial to increasing the contact area of the first member 20 and the second member 21 and increasing the stability of the structural connection of the two members on the other hand; this design not only ensures a secure mounting of the arcuate connection 22, but also further optimizes the internal circulation path of the balls 7 by its precise fit. In addition, the second member 21 is abutted against the inner side wall of the side connecting hole 13, increasing the structural integrity and stability of the entire member.
A first spiral half groove 24 is formed at one side of the arc-shaped connecting part 22, a second spiral half groove 25 is formed on the second member 21, and the first spiral half groove 24 and the second spiral half groove 25 are matched to form a first channel 17. This spiral half-groove design allows for smoother and consistent ball 7 path through the positive connection 15, reducing impact and wear at the turn, while also providing a clear guiding path for the ball 7.
As a preferable aspect of the present embodiment, the lower end surface of the positive connection member 15 is provided with a first connection portion 26, and the first connection portion 26 includes a planar portion 27 and a curved portion 28 which are integrally provided; the upper end surface of the main body member 14 is provided with a second connecting portion 29, and the second connecting portion 29 is an arc-shaped curved surface gradually inclined upwards along the first direction; the first connecting portion 26 is attached to the second connecting portion 29, and the first connecting portion 26 and the second connecting portion 29 are fixed in a limiting manner in a curved surface matching manner. The first connecting portion 26 and the second connecting portion 29 are designed in a curved surface matching manner, so that the contact area of the first connecting portion 26 and the second connecting portion can be increased, and meanwhile, guiding effect can be provided for the plugging process of the positive connecting piece 15.
In the present embodiment, one end of the second member 21 is provided with a protrusion 30, the protrusion 30 having an outer surface 31 and an inner surface 32; the outer surface 31 is a curved surface matching the outer side wall of the screw member 1, the inner surface 32 is connected to a section of the second spiral half groove 25, and the inner surface 32 is used for limiting the rolling of the balls 7. The inner surface of the projection 30 is connected to the second helical half-groove 25, which together with the outer surface plays an important role-limiting and guiding the cyclic movement of the ball along a specific trajectory; the limiting function of the inner surface ensures that the balls do not depart from their intended path, and remain stable even when running at high speed or under heavy loads; the screw-nut assembly is beneficial to maintaining high efficiency and long-term reliability.
Embodiment two:
a transmission system comprising an internally circulating lead screw nut assembly as in embodiment one. The installation and operation process of the screw member 1 and the nut 2 is similar to that of a conventional screw module, except that the present solution requires construction of the circulation channel 8, and installation of the inner circulation member 5.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. An internal circulation screw-nut assembly, characterized by comprising a screw member (1) and a nut (2), wherein a screw channel (3) is formed between the screw member (1) and the nut (2);
an inner cavity hole (4) is formed in the screw rod member (1), an inner circulation member (5) is mounted in the inner cavity hole (4), an inner channel (6) is formed in the inner circulation member (5), and two sections of the inner channel (6) are respectively communicated with the spiral channel (3) to form a circulation channel (8) for rolling the ball (7);
the screw rod component (1) is provided with a through hole (12) in a penetrating manner along the length direction, and two side connecting holes (13) are formed in preset positions of the through hole (12);
the internal circulation component (5) comprises a main body component (14), and a positive connecting piece (15) and a negative connecting piece (16) which are respectively arranged at two ends of the main body component (14); the positive connecting piece (15) and the negative connecting piece (16) are respectively arranged in the corresponding side connecting holes (13);
the main body member (14) is provided with a first channel (17) along the length direction, the positive connecting piece (15) is internally provided with a second channel (18) which is arc-shaped, the inverse connecting piece (16) is internally provided with a third channel (19) which is arc-shaped, and the inner channel (6) is formed between the first channel (17), the second channel (18) and the third channel (19).
2. The internally circulating screw-nut assembly according to claim 1, characterized in that the outer side wall of the screw member (1) is provided with a first spiral groove (9), the cross section of the first spiral groove (9) along its spiral line is semicircular;
the inner side wall of the nut (2) is provided with a second spiral groove (10), and the second spiral groove (10) is matched with the first spiral groove (9) to form the spiral channel (3).
3. The internally circulating screw nut assembly according to claim 2, characterized in that the central axis length of the first helical groove (9) is smaller than the central axis length of the second helical groove (10);
two sections of the second spiral groove (10) are respectively provided with a limiting part (11), and the limiting parts (11) are used for preventing the balls (7) in the circulating channel (8) from overflowing; so that the difference between the central axis length of the second spiral groove (10) and the central axis length of the first spiral groove (9) is the sliding travel of the screw nut assembly.
4. The internally circulated lead screw nut assembly according to claim 1, characterized in that two of the side connection holes (13) are provided through the side walls of the lead screw member (1), respectively, and the two side connection holes (13) are provided at opposite side portions of the lead screw member (1), respectively;
the two side connecting holes (13) and the hole section of the through hole (12) between the two side connecting holes (13) are formed with the inner cavity hole (4).
5. The internal circulation lead screw nut assembly according to claim 1, characterized in that the positive connection (15) comprises a first member (20) and a second member (21), the second member (21) being arranged to fit against the inner side wall of the side connection hole (13);
an arc-shaped connecting part (22) is arranged at one side part of the first component (20) close to the second component (21), and the arc-shaped connecting part (22) protrudes out of the first component (20);
an arc-shaped groove (23) is formed in one side part of the second component (21) close to the first component (20), and the arc-shaped connecting part (22) is arranged in the arc-shaped groove (23);
a first spiral half groove (24) which is spiral is formed in one side portion of the arc-shaped connecting portion (22), a second spiral half groove (25) is formed in the second component (21), and the first spiral half groove (24) and the second spiral half groove (25) are matched to form the first channel (17).
6. The internally circulating screw-nut assembly according to claim 5, characterized in that the lower end face of the positive connection piece (15) is provided with a first connection portion (26), the first connection portion (26) comprising a planar portion (27) and a curved portion (28) integrally provided;
the upper end face of the main body member (14) is provided with a second connecting part (29), and the second connecting part (29) is an arc-shaped curved surface which is gradually and upwards inclined along a first direction;
wherein the first connecting part (26) is attached to the second connecting part (29).
7. The internally circulating screw nut assembly according to claim 6, characterized in that an end of the second member (21) is provided with a protrusion (30), the protrusion (30) having an outer surface (31) and an inner surface (32);
the outer surface (31) is a curved surface matched with the outer side wall of the screw rod member (1), the inner surface (32) is connected with one section of the second spiral half groove (25), and the inner surface (32) is used for limiting the rolling of the balls (7).
8. A transmission system comprising an internally circulating lead screw nut assembly as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410228707.1A CN117803692B (en) | 2024-02-29 | 2024-02-29 | Internal circulation screw-nut assembly and transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410228707.1A CN117803692B (en) | 2024-02-29 | 2024-02-29 | Internal circulation screw-nut assembly and transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117803692A true CN117803692A (en) | 2024-04-02 |
| CN117803692B CN117803692B (en) | 2024-05-03 |
Family
ID=90430337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410228707.1A Active CN117803692B (en) | 2024-02-29 | 2024-02-29 | Internal circulation screw-nut assembly and transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117803692B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201310606Y (en) * | 2008-09-27 | 2009-09-16 | 南京工艺装备制造有限公司 | Ball screw pair with steep-lead internal circulation structure |
| CN203906695U (en) * | 2014-01-17 | 2014-10-29 | 博世力士乐（常州）有限公司 | Ball screw mechanism and machine tool comprising same |
| CN205244305U (en) * | 2015-12-09 | 2016-05-18 | 河北天阶谐波机械有限公司 | Roll formula worm gear's special worm |
| US20170023080A1 (en) * | 2013-11-27 | 2017-01-26 | Kelsey-Hayes Company | Ball Nut Assembly for an Electromechanically Actuable Parking Brake Assembly of a Brake Assembly |
| CN114623218A (en) * | 2022-04-02 | 2022-06-14 | 深圳市威远精密技术有限公司 | Ball screw pair with hole-opening circulator, brake and new energy automobile |
| CN218235992U (en) * | 2022-09-19 | 2023-01-06 | 比亚迪股份有限公司 | Worm assembly and worm-gear pair with same |
-
2024
- 2024-02-29 CN CN202410228707.1A patent/CN117803692B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201310606Y (en) * | 2008-09-27 | 2009-09-16 | 南京工艺装备制造有限公司 | Ball screw pair with steep-lead internal circulation structure |
| US20170023080A1 (en) * | 2013-11-27 | 2017-01-26 | Kelsey-Hayes Company | Ball Nut Assembly for an Electromechanically Actuable Parking Brake Assembly of a Brake Assembly |
| CN203906695U (en) * | 2014-01-17 | 2014-10-29 | 博世力士乐（常州）有限公司 | Ball screw mechanism and machine tool comprising same |
| CN205244305U (en) * | 2015-12-09 | 2016-05-18 | 河北天阶谐波机械有限公司 | Roll formula worm gear's special worm |
| CN114623218A (en) * | 2022-04-02 | 2022-06-14 | 深圳市威远精密技术有限公司 | Ball screw pair with hole-opening circulator, brake and new energy automobile |
| CN218235992U (en) * | 2022-09-19 | 2023-01-06 | 比亚迪股份有限公司 | Worm assembly and worm-gear pair with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117803692B (en) | 2024-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4384379B2 (en) | A linear motion guide unit that connects the direction change path and return path with a connecting pipe. | |
| US4604911A (en) | Recirculating-ball rotary-to-linear converter with an improved ball return guide | |
| US6176149B1 (en) | Ball screw having spacers | |
| US20060023980A1 (en) | Rolling guide unit | |
| US7780356B2 (en) | Slider for linear motion rolling guide unit | |
| US5299465A (en) | Ball screw integrated type linear movement guiding unit | |
| JPH03121341A (en) | Ball screw assembly | |
| JP4965362B2 (en) | Roller type linear motion guide unit | |
| EP2515000A1 (en) | Ball screw assembly with recirculating cap and nut | |
| CN105822739B (en) | The built-in throttling pressurized pair of nut of guiding valve | |
| CN117803692B (en) | Internal circulation screw-nut assembly and transmission system | |
| US4553793A (en) | Recirculating-ball linear bearing with a guide rail | |
| US20070221002A1 (en) | Roller screw mechanism | |
| CN116336155B (en) | Quincuncial reverser suitable for internal circulation ball screw pair | |
| CN219388438U (en) | Slider convenient to dismouting and have its linear guide | |
| CN209818672U (en) | Fine adjustment screw rod assembly for adjusting high guidance performance and low drift angle | |
| US7465093B2 (en) | Linear guide apparatus | |
| CN202228619U (en) | Steel ball reversing mechanism for ball screw assembly | |
| EP1574752A2 (en) | A ball screw | |
| CN111120606A (en) | Internal circulation ball screw pair with Archimedes spiral transition curved surface | |
| JP3221395U (en) | External circulation ball screw | |
| CN108916341B (en) | Flexible steel ball reversing circulating device | |
| CN220687842U (en) | Hollow light linear guide rail | |
| CN114060486B (en) | External circulation ball screw and return pipe structure thereof | |
| CN221145203U (en) | External circulation combined type roller screw pair |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |