WO2011057479A1 - 组合螺旋副 - Google Patents

组合螺旋副 Download PDF

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Publication number
WO2011057479A1
WO2011057479A1 PCT/CN2010/001830 CN2010001830W WO2011057479A1 WO 2011057479 A1 WO2011057479 A1 WO 2011057479A1 CN 2010001830 W CN2010001830 W CN 2010001830W WO 2011057479 A1 WO2011057479 A1 WO 2011057479A1
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WO
WIPO (PCT)
Prior art keywords
rolling
screw
nut
sliding
groove
Prior art date
Application number
PCT/CN2010/001830
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English (en)
French (fr)
Inventor
王燏斌
Original Assignee
江苏速升自动化装备系统工程有限公司
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Filing date
Publication date
Application filed by 江苏速升自动化装备系统工程有限公司 filed Critical 江苏速升自动化装备系统工程有限公司
Publication of WO2011057479A1 publication Critical patent/WO2011057479A1/zh

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H25/00Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20Screw mechanisms
    • F16H25/24Elements essential to such mechanisms, e.g. screws, nuts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H25/00Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20Screw mechanisms
    • F16H25/22Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2204Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls

Definitions

  • the invention relates to a combined spiral pair which combines a sliding spiral pair and a rolling spiral pair, and belongs to the technical field of screw transmission in mechanical transmission.
  • the screw drive can be generally divided into a sliding spiral pair and a rolling spiral pair according to the friction state between the threads.
  • the sliding spiral pair has large frictional resistance and low efficiency, but can be self-locking; the rolling spiral has low frictional resistance and high efficiency, but cannot be self-locking.
  • the present invention provides a combined spiral pair having the advantages of both a rolling screw drive and a sliding screw drive.
  • the technical solution of the invention is characterized in that it is composed of two kinds of spiral pairs, one of which is a rolling spiral pair, which forms a rolling friction between the screw rod and the nut through the rolling body, and the other is a sliding spiral pair, the screw rod and the nut Forming sliding friction.
  • the nut shape of the rolling screw pair is called a rolling tooth
  • the tooth shape of the nut in the sliding screw pair is called a sliding tooth
  • the tooth groove of the screw in the rolling screw pair is called a rolling groove
  • the toothed groove of the screw in the sliding spiral pair is called a sliding groove.
  • the rolling groove and the sliding groove on the screw may be different or the same.
  • the following combination spiral groove on the screw rod and the sliding groove are called the combined spiral pair A.
  • the tooth grooves of the two spiral pairs are crossed together.
  • the rolling teeth and sliding teeth of the nut are respectively described by circular teeth and trapezoidal teeth
  • the screw is The rolling groove and the sliding groove are described by a circular (waist) groove and a trapezoidal groove, respectively.
  • the case where the rolling groove and the sliding groove on the screw are the same is referred to as a combined spiral pair, which is described in the specification by a half-waist groove.
  • the combined spiral pair A has two structures in which the width of the tooth groove of the screw pair A is changed and is constant in the longitudinal direction of the screw.
  • the width of the tooth groove is varied
  • the width of the toothed groove of the lead screw in the combined screw pair A is varied, and the shape of the nut does not change.
  • the nut is fixed and the screw is subjected to the force in the longitudinal direction, and the four structures are used to explore the problem.
  • Structure 1 In the different lengths of the screw rod, the two-way rolling friction function is realized by increasing the width of the screw sliding groove.
  • Structure 2 In the different lengths of the screw rod, the two-way sliding friction function is realized by increasing the width of the screw rolling groove. '
  • Structure 3 In the different lengths of the screw rod, by changing the width of the screw sliding groove and the rolling groove and the distance between the sliding groove and the rolling groove, if the positive force is rolling friction, the force is opposite when The function of sliding friction (hereinafter referred to as "rolling and rolling").
  • Structure 4 Combine the above structure 1, structure 2 and structure 3, and realize a plurality of different functional areas on the same screw rod, that is, by increasing the width of the trapezoidal groove of the screw rod, or increasing the circular groove of the screw rod. Width, or change the width of the two toothed grooves and the mutual distance between the two shapes, to achieve different functional areas of two-way sliding friction, two-way rolling friction or one roll and one sliding in different lengths of the screw.
  • the rolling nut can only move in a passive straight line, and the screw can only rotate actively.
  • the quality of the m nut is negligible.
  • the screw rod in the combined screw pair A has the same width of the two tooth-shaped grooves in the longitudinal direction
  • the combination nut used in combination with the toothed groove screw is composed of an A sliding nut, an A rolling nut, a pin, an A-plane bearing and B rolling element composition, wherein the A rolling nut and the A sliding nut have an A-plane bearing between the length direction of the lead screw, the pin is located between the A rolling nut and the A sliding nut, and the A rolling nut or the A sliding nut has a pin groove.
  • the pin is fixedly connected with the A sliding nut or the A rolling nut, and the pin can move in the pin groove.
  • the combination nut changes the distance between the two nuts in the length direction of the screw rod, that is, changes the distance between the rolling tooth and the sliding tooth in the combined nut.
  • the combined spiral pair B means that the tooth groove of the screw rolling tooth and the tooth groove of the sliding tooth have the same shape and are combined into one, that is, the screw has only one tooth groove, and the semi-waist groove is unified in the specification.
  • the toothed groove of the screw in the combined screw pair B is a half-waist shape.
  • the combination nut matched with the semi-waisted slot screw is characterized in that the combination nut is composed of a B sliding nut, a B rolling nut, a pin, a B-plane bearing and a C rolling element, wherein the B rolling nut and The B sliding nut has a B-plane bearing between the length direction of the lead screw, the pin is located between the rolling nut and the sliding nut, and the B rolling nut or the B sliding nut is provided with a pin groove, and the pin is fixedly connected with the B sliding nut or the B rolling nut. The pin can move in the pin groove.
  • the combination nut changes the distance between the two nuts in the length direction of the screw rod, that is, changes the distance between the two different tooth shapes, so that the screw rod drives the nut upwardly when it is rolling friction. It is a function of sliding friction when moving down.
  • the advantages of the invention the two spiral pairs are combined to complement their advantages and disadvantages, and the two-way rolling friction, the two-way sliding friction and the one rolling and one sliding can be respectively realized in different length regions of the screw rod. In the functional area, it is also possible to realize the rolling friction when the screw is driven upward by the nut, and the sliding friction when moving downward.
  • the advantage of the combined screw pair A is that the screw processing is simple and convenient; the advantage of the combined screw pair B is that the screw can be single tooth and small in size.
  • Fig. 1 is a schematic view showing the spiral pair according to the first embodiment of the present invention, which is rolling friction to the left and right.
  • 2 is a schematic view of the spiral pair according to the second embodiment of the present invention, which is rolling friction to the left and right.
  • Fig. 3 is a schematic view showing the sliding pair of the spiral pair according to the third embodiment of the present invention, which is sliding to the left and to the right.
  • 4 is a schematic view of the spiral pair according to the fourth embodiment of the present invention, which is sliding friction to the left and right.
  • Figure 5 is a schematic diagram showing tl, t2 in the present invention. T1 and t2 respectively indicate the widths of the trapezoidal grooves and the semi-waist grooves in the combined spiral pair A.
  • FIG. 6 is a schematic diagram of the spiral pair as a roll-to-slip function according to Embodiment 5 of the present invention.
  • FIG. 7 is a schematic diagram of the spiral pair being a roll-to-slip function according to Embodiment 6 of the present invention.
  • Figure 8 is a variant of the embodiment 5 of the present invention (i.e., an embodiment in which the lead screw is changed in direction).
  • FIG. 9 and FIG. 10 show that the width of the screw-shaped groove of the combined screw pair A in the combined spiral pair A according to the seventh embodiment of the present invention is a rolling friction when the nut is driven upward by the combination nut, and the sliding friction is when the downward movement is performed. Schematic of the function.
  • FIG. 11 and 12 show another configuration of the combination nut in the combination screw pair A according to the eighth embodiment of the present invention.
  • Figure 13 shows a schematic view of the C direction.
  • Figure 14 shows a schematic view of the D direction.
  • Fig. 15 is a schematic view showing the shape of the tooth of the sliding tooth in the combined spiral pair A being circular.
  • 16 and 17 are schematic views of a combined spiral pair B according to a ninth embodiment of the present invention.
  • 1 is an A nut
  • 2 is an A rolling element
  • 3 is a screw shown in Embodiments 1 to 6
  • 4 is a toothed slot screw according to Embodiments 7 and 8
  • 5 is a B rolling element
  • 6 It is an A rolling nut
  • 7 is an A-plane bearing
  • 8 is an A sliding nut
  • 9 is a pin
  • 10 is a pin groove
  • ⁇ 1 is the ⁇ nut described in Embodiment 4
  • 12 is the C nut described in Embodiment 6
  • 13 is The circular teeth described in the sliding teeth
  • 14 is a semi-waisted slotted rod
  • 15 is a C rolling element
  • 16 is a rolling nut
  • 17 is a ⁇ plane bearing
  • 18 is the D nut described in Embodiment 2
  • 19 is ⁇ Slide the nut.
  • the combined spiral pair is composed of two kinds of spiral pairs, one of which is a rolling spiral pair, which forms a rolling friction with the nut by the rolling body, and the other is a sliding spiral pair, which forms a sliding friction with the nut.
  • the tooth groove of the screw in the rolling screw pair is referred to as a rolling groove
  • the tooth groove of the screw in the sliding screw pair is referred to as a sliding groove
  • the tooth shape of the nut in the rolling screw pair is referred to as rolling Tooth
  • the tooth shape of the nut in the sliding screw pair is called a sliding tooth.
  • the rolling groove and the sliding groove may be different or the same.
  • the following is a case where the rolling groove and the sliding groove are different, which is called a combined spiral auxiliary cymbal.
  • the two kinds of helical pairs of the toothed grooves are crossed together, and the nut is placed in the specification.
  • Rolling teeth and sliding teeth are respectively applied with circular teeth and trapezoidal teeth Description, the rolling groove and the sliding groove on the screw are described by a circular (waist) groove and a trapezoidal groove, respectively. The case where the rolling groove and the sliding groove on the screw are the same is referred to as a combined spiral pair B, which is described in the specification with a half-waist groove.
  • sliding teeth (grooves) and rolling teeth (grooves) in the combined helical pair A are not limited to trapezoidal teeth (grooves) and circular teeth (grooves), for example, the sliding teeth may also be circular. , as shown in Figure 13; the rolling elements can also use rollers.
  • the width of the toothed groove of the combined helical sub-A splitter is variable and constant.
  • the combined helical pair A is characterized in that the toothed groove of the screw in the rolling screw pair is different from the toothed groove of the screw in the sliding screw pair.
  • the width of the toothed groove of the lead screw in the combined screw pair A is variable, and the tooth profile width of the nut is constant.
  • the nut is fixed and the screw is subjected to the force in the longitudinal direction, and the four structures are used to explore the problem.
  • Structure 1 By increasing the width of the trapezoidal slot of the screw, the two-way rolling friction function is realized.
  • the characteristic of the combined spiral pair A is: the A nut 1 used in conjunction with the screw rod 3 is unchanged, the circular groove of the screw rod 3 is just matched with the ball 2, and the width of the trapezoidal groove of the screw rod is larger than the width of the trapezoidal tooth of the nut. .
  • Embodiment 1 As shown in FIG. 1, when the circular groove of the screw rod 3 is semicircular, the size is just matched with the A rolling element 2, and the width of the trapezoidal groove of the screw is larger than the width of the trapezoidal tooth of the nut, that is, FIG. In the state shown, rolling friction is left and right.
  • Embodiment 2 A scheme which can also realize two-way rolling friction, as shown in Fig. 2. This embodiment is different from the above-described Embodiment 1.
  • the trapezoidal teeth and the circular teeth are crossed, and in the present embodiment, the threads of the nut are separated, and a tooth shape is Before, another tooth shape is behind.
  • Structure 2 In the different lengths of the screw rod, the double-direction sliding friction function is realized by increasing the width of the circular groove.
  • the combination of the screw pair A is characterized in that: the A nut 1 used in conjunction with the screw rod 3 is unchanged, and the circular groove of the screw rod 3 has a semi-waist shape, and the trapezoidal groove size of the screw rod matches the trapezoidal tooth of the nut.
  • Embodiment 3 As shown in FIG. 3, when the circular groove of the screw rod 3 has a half-waist shape, the trapezoidal groove size of the screw rod matches the trapezoidal tooth of the nut, that is, the state shown in FIG. The right is sliding friction.
  • Embodiment 4 A scheme which can also achieve two-way sliding friction, as shown in Fig. 4. This embodiment is different from the above-described Embodiment 3.
  • the trapezoidal teeth and the circular teeth are crossed, and in this embodiment, the threads of the nut are separated, and a tooth shape is Before, another tooth shape is behind.
  • Structure 3 In the different length regions of the screw rod, by changing the width of the two tooth-shaped grooves and the mutual distance between the two tooth shapes, if the positive force is rolling friction, the sliding force is reversed when the force is reversed. The function.
  • the following description uses the trapezoidal groove and the circular (waist) groove to describe the sliding groove and the rolling groove, respectively, and the trapezoidal tooth and the circular tooth are used to express the sliding tooth and the rolling tooth, respectively.
  • the characteristic of the combined spiral pair A is: the A nut 1 used with the screw rod 3 is unchanged, the screw ladder The width of the groove is larger than the width of the trapezoidal tooth of the nut, and the circular groove of the screw 3 has a semi-waist shape, the length of which is larger than the diameter of the A rolling element 2, and the mutual distance between the two shapes is not equal, that is, in the screw
  • the center of the trapezoidal groove in this length range is not located at the center of the adjacent two halves of the waist groove.
  • the mutual distance between the two types of teeth is not equal, which means that the center of the trapezoidal groove is not located at the center of the adjacent two half-waist grooves in the length range of the screw.
  • Embodiment 5 When the nut is fixed and the screw is subjected to the leftward force, it is rolling friction. At this time, the trapezoidal tooth on the nut does not contact the trapezoidal groove on the screw, that is, the trapezoidal thread does not function; When the rod is subjected to the rightward force, the screw rod moves to the right. At this time, the A rolling element 2 does not contact the semi-waist groove in the longitudinal direction of the screw rod. The 3 ⁇ 4'PA rolling element 2 does not function, the trapezoidal tooth of the nut The trapezoidal groove of the 1 ⁇ 2 screw rod is in contact with the trapezoidal thread, and the screw rod is sliding friction when it is working.
  • Embodiment 6 A scheme that can also implement a roll-to-slip function, as shown in FIG. This embodiment is different from the above-described embodiment 5.
  • the trapezoidal teeth and the circular teeth are crossed, and in the embodiment, the threads of the nut are separated, and a tooth shape is Before, another tooth shape is behind.
  • Structure 4 The above structure 1, structure 2 and structure 3 are combined and used, and when the nut is unchanged, a plurality of different functional areas are realized on the same screw, that is, by increasing the width of the trapezoidal groove, or increasing The width of the circular groove, or the width of the two toothed grooves and the phase between the two shapes The mutual distance is realized in different length regions of the screw rod, and has different functional areas of two-way sliding friction, two-way rolling friction or one rolling and one sliding. The following is expressed in three combinations.
  • Combination method 1 structure one and structure three combination
  • the characteristic of the combined spiral pair A is: the A nut 1 used in conjunction with the screw rod 3 is unchanged, the circular groove of the screw rod 3 is semi-waisted, and the two functional areas of the screw rod are divided into two-way sliding friction and one rolling and one sliding. .
  • the characteristic of the combined spiral pair A is: the A nut 1 used in conjunction with the screw rod 3 is unchanged, the trapezoidal groove of the screw rod 3 is larger than the trapezoidal tooth of the nut, and the two functional areas of the screw rod are divided into two-way rolling friction and one rolling and one sliding. .
  • the combination of the screw pair A is characterized in that: the A nut 1 used in conjunction with the screw rod 3 is unchanged, and the screw rod has three functional areas of two-way sliding friction, two-way rolling friction and one rolling and one sliding.
  • the toothed slot screw 4 has double teeth, wherein one tooth forms a rolling screw transmission through the B rolling element 5 and the B nut 6, and the other tooth and the sliding nut constitute a sliding screw transmission, and the width or size of the tooth groove of the screw rod is not change.
  • the profile of the rolling screw drive on the screw and the profile of the sliding screw drive are respectively expressed by circular teeth and trapezoidal teeth.
  • the screw in the combined screw pair A has the same width of the two tooth grooves in the longitudinal direction, and the combined nut used with the toothed slot screw 4 is composed of the A sliding nut 8, the A rolling nut 6, the pin 9, A
  • the flat bearing 7 and the B rolling element 5 are composed, wherein the A rolling nut 6 and the A sliding nut 8 have an A-plane bearing 7 between the length of the lead screw, and the pin 9 is located between the rolling nut and the sliding nut, on the rolling nut or the sliding nut
  • the pin With a pin groove, the pin is fixed with a sliding nut or a rolling nut, and the pin can be Movement in the pin groove, the combination nut is changed by the distance between the A rolling nut 6 and the A sliding nut 8, that is, the distance between the circular tooth and the trapezoidal tooth is changed, and the rolling friction is realized when the screw driving nut is moved upward.
  • the downward friction is a function of sliding friction.
  • the A sliding nut 8 and the lead screw of the combination nut are self-locking under the condition that the pressure angle satisfies the self-locking.
  • the pin 9 has two extreme positions in the pin groove 10, which respectively correspond to two states of rolling friction and sliding friction in the combined screw pair.
  • the sliding friction becomes the process of rolling friction.
  • the A-plane bearing 7 and the A-roll nut 6 have no gap, and the B-rolling body 5 has no contact with the semi-waist groove of the screw rod in the longitudinal direction of the screw rod, and the pin 9 corresponds to the pin groove 10
  • the positional map is shown in Fig. 14.
  • the force F is transmitted to the rolling nut 8 by the A rolling nut 6 to the rolling element, that is, the combined nut is in a sliding friction state.
  • the toothed slot screw 4 rotates with the A sliding nut 8 , that is, the toothed slot screw 4 and the A sliding nut 8 have no relative displacement, so that the pin 9 is left in the pin slot 10 by the left Moving to the right, the A rolling nut 6 moves downward, gradually bringing it into contact with the A-plane bearing 7, the toothed slot screw 4 continues to rotate, and the B rolling element 5 gradually merges with the bottom of the semi-waist groove of the toothed slotted rod 4.
  • the rolling elements can be balls or rollers.
  • the rolling nut is embedded in the sliding nut.
  • the principle of this embodiment is the same as that of Embodiment 7, and will not be described here.
  • the combined spiral pair B means that the tooth groove of the screw rolling tooth is the same as the tooth groove of the sliding tooth, and is described in the specification by a semi-waist groove.
  • the combined spiral pair B is characterized in that: the tooth groove of the screw is a semi-waist groove.
  • the combination nut that cooperates with the semi-waisted slotted rod 14 is composed of a B sliding nut 19, a B rolling nut 16, a pin 9, a B-plane bearing 17, and a C rolling element 15, wherein the B rolling nut 16 is B sliding nut 19 has a B-plane bearing 17 between the length direction of the lead screw, the pin is located between the B rolling nut and the B sliding nut, and the pin nut or pin is opened on the B rolling nut or the B sliding nut.
  • the nail is fixedly connected with the B sliding nut or the 8 rolling nut, and the pin can move in the pin groove.
  • the combination nut changes the distance between the B sliding nut 19 and the B rolling nut 16, that is, changes the distance between the two different shapes. It realizes the rolling friction when the screw is driven upward, and the sliding friction when moving downward.
  • the sliding friction becomes the process of rolling friction.
  • the B-plane bearing 17 and the B-roll nut 16 have no gap, and the C-rolling body 15 has no contact with the semi-waist groove of the screw in the longitudinal direction of the screw, and the pin 9 corresponds to the pin groove 10
  • the positional map is shown in Fig. 14, and the force F is transmitted to the rolling nut by the B rolling nut 16 to act on the B sliding nut 19, that is, the combined nut is in a sliding state.
  • the B-plane bearing 17 has a gap with the B-roll nut 16, and the C-rolling body 15 is in contact with the bottom of the semi-waist groove of the screw in the longitudinal direction of the screw, and the pin 9 corresponds to the pin groove 10
  • the position map is shown in Fig. 13.
  • the B sliding nut 19 does not bear the force F, that is, the combination nut is at this time. Rolling friction state.
  • the semi-waisted slotted rod 14 drives the B-sliding nut 19 to rotate together, that is, the half-waisted slotted rod 14 and the B-sliding nut 19 have no relative displacement, so that the pin 9 is left in the pin slot 10 by the left Moving to the right, the B-roll nut 16 moves downward, gradually bringing it into contact with the B-plane bearing 17, the semi-waisted slotted rod 14 continues to rotate, and the C-rolling body 15 gradually merges with the half-waisted groove of the semi-waisted slotted rod 14.
  • the bottom portion is disengaged, that is, there is no contact with the semi-waist groove in the longitudinal direction of the screw rod, and the force F acts on the B sliding nut 19 through the B-plane bearing 17 through the B-rolling nut 15, and the pin 9 moves in the pin groove 10 to Fig. 14
  • the B-roll nut 16 moves downward with the B-sliding nut 19 due to the action of the pin 9.
  • the C rolling element 15 does not function, and the downward force F is received by the B sliding nut 19, so this is sliding friction.
  • the rolling nut is embedded in the sliding nut.
  • the principle of this embodiment is the same as that of the embodiment 9, and will not be described here.

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Description

组合螺旋副
技术领域
本发明涉及是一种将滑动螺旋副和滚动螺旋副组合在一起的组合螺旋 副, 属于机械传动中的螺旋传动技术领域。
背景技术
螺旋传动按螺紋间摩擦状态一般可以分为滑动螺旋副和滚动螺旋副。 滑动螺旋副摩擦阻力大, 效率低, 但能自锁; 滚动螺旋副摩擦阻力小, 效 率高, 但不能自锁。
发明内容
本发明提供一种具有滚动螺旋传动和滑动螺旋传动两种传动优点为一 体的组合螺旋副。
本发明的技术解决方案: 其特征是由两种螺旋副组成的, 其中一种是 滚动螺旋副, 通过滚动体使丝杆与螺母形成滚动摩擦, 另一种是滑动螺旋 副, 丝杆与螺母形成滑动摩擦。
为方便描述, 说明书中将滚动螺旋副中螺母牙形称为滚动牙, 将滑动 螺旋副中螺母的牙形称为滑动牙; 将滚动螺旋副中丝杆的牙形槽称为滚动 槽, 将滑动螺旋副中丝杆的牙形槽称为滑动槽。
丝杆上的滚动槽和滑动槽可以不相同, 也可以相同。 为方便描述, 以 下将丝杆上的滚动槽和滑动槽不相同的组合螺旋副,称为组合螺旋副 A,在 丝杆的同一长度范围内, 两种螺旋副的牙形槽交叉在一起的, 在说明书中 将螺母 的滚动牙和滑动牙分别用圆形牙和梯形牙加以描述, 将丝杆上的 滚动槽和滑动槽分别用圆 (腰) 形槽和梯形槽加以描述。 将丝杆上的滚动 槽和滑动槽相同的情况,称为组合螺旋副^在说明书中用半腰形槽加以描 述。 组合螺旋副 A在丝杆长度方向上, 组合螺旋副 A中丝杆的牙形槽的宽 度有变化和不变的两种结构。
一、 牙形槽的宽度是变化的
组合螺旋副 A中的丝杆的牙形槽的宽度是变化的, 螺母的牙形不变。 为方便描述, 假设螺母固定不动, 丝杆受长度方向作用力, 分四种结构探 讨问题。
结构一: 在丝杆的不同长度区域内, 通过加大丝杆滑动槽的宽度, 实 现双向滚动摩擦功能。
结构二: 在丝杆的不同长度区域内, 通过加大丝杆滚动槽的宽度, 实 现双向滑动摩擦功能。 '
结构三: 在丝杆的不同长度区域内, 通过改变丝杆滑动槽和滚动槽的 宽度及滑动槽和滚动槽相互间的距离, 实现如正向作用力为滚动摩擦, 则 作用力相反时为滑动摩擦 (以下简称一滚一滑) 的功能。
结构四: 将上述结构一、 结构二和结构三结合起来使用, 同一根丝杆 上实现多个不同的功能区域, 即通过加大丝杆梯形槽的宽度, 或加大丝杆 圆形槽的宽度, 或改变两种牙形槽的宽度和两种牙形间的相互距离, 实现 在丝杆的不同长度区域内, 具有双向滑动摩擦、 双向滚动摩擦或一滚一滑 的不同功能区域。
二、 牙形槽的宽度是不变的
为方便描述, 假设滚动螺母只能被动直线运动, 丝杆只能主动旋转, m动螺母的质量忽略不计。
组合螺旋副 A中的丝杆在长度方向其两种牙形槽的宽度不变, 与牙形 槽丝杆配合使用的是组合螺母是由 A滑动螺母、 A滚动螺母、 销钉、 A平面 轴承和 B滚动体组成,其中 A滚动螺母与 A滑动螺母在丝杆长度方向间有 A 平面轴承,销钉位于在 A滚动螺母和 A滑动螺母之间, A滚动螺母或 A滑动 螺母上开有销槽, 销钉与 A滑动螺母或 A滚动螺母固连, 销钉可在销槽内 运动, 组合螺母是通过改变在丝杆长度方向两螺母间的距离, 即改变组合 螺母中滚动牙与滑动牙之间的距离, 实现丝杆带动螺母向上运动时是滚动 摩擦, 向下运动时是滑动摩擦的功能。
组合螺旋副 B
为方便描述, 假设滚动螺母只能被动直线运动, 丝杆只能主动旋转, 滑动螺母的质量忽略不计。
组合螺旋副 B是指丝杆滚动牙的牙形槽和滑动牙的牙形槽形状相同, 是合二为一的, 即丝杆只有一种牙形槽, 在说明书中统一用半腰形槽表述。 组合螺旋副 B中丝杆的牙形槽是半腰形。
组合螺旋副 B中, 与半腰形槽丝杆相配合的组合螺母的特征是, 组合 螺母是由 B滑动螺母、 B滚动螺母、 销钉、 B平面轴承和 C滚动体组成, 其 中 B滚动螺母与 B滑动螺母在丝杆长度方向间有 B平面轴承, 销钉位于在 滚动螺母和滑动螺母之间, B滚动螺母或 B滑动螺母上开有销槽, 销钉与 B 滑动螺母或 B滚动螺母固连, 销钉可在销槽内运动, 组合螺母是通过改变 在丝杆长度方向两螺母间的距离, 即改变其两种不同牙形相互间的距离, 实现丝杆带动螺母向上运动时是滚动摩擦, 向下运动时是滑动摩擦的功能。 本发明的优点: 将两种螺旋副组合到一起, 使它们的优点和缺点得到 互补, 在丝杆的不同长度区域内, 可分别实现双向滚动摩檫、 双向滑动摩 擦和一滚一滑的不同功能区域, 也可以通过组合螺母实现丝杆带动螺母向 上运动时是滚动摩擦, 向下运动时是滑动摩擦的功能。 组合螺旋副 A的优 点是, 丝杆加工简单方便; 组合螺旋副 B 的优点是, 丝杆可以是单牙, 体 积小。
附图说明
下面结合附图和实施方式对本发明作进一步详细的说明。
图 1为本发明实施例①所述的螺旋副为向左、 向右均为滚动摩擦的示意图。 图 2为本发明实施例②所述的螺旋副为向左、 向右均为滚动摩擦的示意图。 图 3为本发明实施例③所述的螺旋副为向左、 向右均为滑动摩擦的示意图。 图 4为本发明实施例④所述的螺旋副为向左、 向右均为滑动摩擦的示意图。 图 5为本发明表示 tl、 t2的示意图。 tl、 t2分别表示组合螺旋副 A中梯形 槽和半腰形槽的宽度。
图 6为本发明实施例⑤所述的螺旋副为一滚一滑功能的示意图。
图 7为本发明实施例⑥所述的螺旋副为一滚一滑功能的示意图。
图 8为本发明实施例⑤的一种变形(即丝杆换个方向的实施方式)。
图 9、图 10为本发明实施例⑦所述的组合螺旋副 A中丝杆牙形槽宽度不变, 使用组合螺母实现丝杆带动螺母向上运动时是滚动摩擦, 向下运动时是滑 动摩擦的功能的示意图。
图 11、图 12为本发明实施例⑧所述组合螺旋副 A中的组合螺母的另一种结 构。 图 13表示 C向的示意图。
图 14表示 D向的示意图。
图 15是指组合螺旋副 A中, 滑动牙的牙形型是圆形的示意图。
图 16、 图 17是本发明实施例⑨所述的组合螺旋副 B的示意图。
图 18、图 19是本发明实施例⑩所述组合螺旋副 B中的组合螺母的另一种结 构。
图中, 1是 A螺母, 2是 A滚动体, 3是实施例①〜⑥所述的丝杆, 4 是实施例⑦和⑧所述的牙形槽丝杆, 5是 B滚动体, 6是 A滚动螺母, 7是 A平面轴承, 8是 A滑动螺母, 9是销钉, 10是销槽,Ϊ1是实施例④所述的 Β螺母, 12是实施例⑥所述的 C螺母, 13是滑动牙中所述的圆形牙, 14是 半腰形槽丝杆, 15是 C滚动体, 16是 Β滚动螺母, 17是 Β平面轴承, 18 是实施例②所述的 D螺母, 19是 Β滑动螺母。
具体实施方式
组合螺旋副是由两种螺旋副组成的, 其中一种是滚动螺旋副, 通过滚 动体使丝杆与螺母形成滚动摩擦, 另一种是滑动螺旋副, 丝杆与螺母形成 滑动摩擦。
为方便描述, 说明书中将滚动螺旋副中丝杆的牙形槽称为滚动槽, 将 滑动螺旋副中丝杆的牙形槽称为滑动槽; 将滚动螺旋副中螺母的牙形称为 滚动牙, 将滑动螺旋副中螺母的牙形称为滑动牙。 滚动槽和滑动槽可以不 相同, 也可以相同。 为方便描述, 下面将滚动槽和滑动槽不同的情况, 称 为组合螺旋副 Α,在丝杆的同一长度范围内,两种螺旋副的牙形槽交叉在一 起的, 在说明书中将螺母上的滚动牙和滑动牙分别用圆形牙和梯形牙加以 描述, 将丝杆上的滚动槽和滑动槽分别用圆 (腰)形槽和梯形槽加以描述。 将丝杆上的滚动槽和滑动槽相同的情况,称为组合螺旋副 B,在说明书中用 半腰形槽加以描述。
需要指出的是, 组合螺旋副 A中的滑动牙 (槽)和滚动牙 (槽)并不 局限于梯形牙(槽)和圆形牙(槽), 例如这种滑动牙也可以是圆形的, 如 图 13所示; 滚动体也可以使用滚柱。
组合螺旋副 A
在丝杆长度方向, 组合螺旋副 A分丝杆的牙形槽的宽度是变化和不变 的两种结构。 组合螺旋副 A的特征是滚动螺旋副中丝杆的牙形槽与滑动螺 旋副中丝杆的牙形槽不相同。
一、 丝杆的牙形槽的宽度变化
组合螺旋副 A中的丝杆的牙形槽的宽度可变, 螺母的牙形宽度不变。 为方便描述, 假设螺母固定不动, 丝杆受长度方向作用力, 分四种结构探 讨问题。
以下仅用梯形槽和圆 (腰) 形槽来分别表述滑动槽和滚动槽, 用梯形 牙和圆形牙来分别表述滑动牙和滚动牙。
结构一: 通过加大丝杆梯形槽的宽度, 实现双向滚动摩擦功能。
组合螺旋副 A的特征是: 与丝杆 3配合使用的 A螺母 1不变, 丝杆 3 的圆形槽的大小刚好跟滚珠 2配合, 而丝杆梯形槽的宽度大于螺母的梯形 牙的宽度。
实施例①: 如图 1所示, 当丝杆 3的圆形槽呈半圆 , 大小刚好跟 A 滚动体 2配合, 而丝杆梯形槽的宽度大于螺母的梯形牙的宽度时, 即图 1 所示的状态, 向左、 向右均为滚动摩擦。
实施例②: 同样能实现双向滚动摩擦的一种的方案, 即如图 2所示。 该实施例与上述实施例①不相同的是, 在实施例①的螺母中, 梯形牙和圆 形牙是交叉在一起的, 而本实施例中螺母的螺纹是分开的, 一种牙形在前, 另一种牙形在后。
结构二: 在丝杆的不同长度区域内, 通过加大圆形槽的宽度, 实现双 向滑动摩擦功能。
组合螺旋副 A的特征是: 与丝杆 3配合使用的 A螺母 1不变, 丝杆 3 的圆形槽呈半腰形, 丝杆梯形槽大小与螺母的梯形牙相配合。
实施例③: 如图 3所示, 当丝杆 3的圆形槽呈半腰形, 丝杆梯形槽大 小与螺母的梯形牙相配合时, 即如图 3所示的状态, 向左、 向右均为滑动 摩擦。
实施例④: 同样能实现双向滑动摩擦的一种的方案, 即如图 4所示。 该实施例与上述实施例③不相同的是, 在实施例③的螺母中, 梯形牙和圆 形牙是交叉在一起的, 而本实施例中螺母的螺纹是分开的, 一种牙形在前, 另一种牙形在后。
结构三: 在丝杆的不同长度区域内, 通过改变两种牙形槽的宽度和两 种牙形间的相互距离, 实现如正向作用力为滚动摩擦, 则作用力反向时为 滑动摩擦的功能。
以下用梯形槽和圆 (腰)形槽来分别表述滑动槽和滚动槽, 用梯形牙 和圆形牙来分别表述滑动牙和滚动牙。
组合螺旋副 A的特征是: 与丝杆 3配合使用的 A螺母 1不变, 丝杆梯 形槽的宽度大于螺母的梯形牙的宽度, 丝杆 3的圆形槽呈半腰形, 其长度 大于 A滚动体 2的直径, 且两种牙形间的相互距离不相等, 即在丝杆此长 度范围内梯形槽的中心并不位于相邻两半腰形槽的中心。
如图 6所示, 当丝杆 3的圆形槽呈半腰形时, 设半腰形槽的两圆心之 间的距离为 A, 当 A滚动体 2运动到如图所示的半腰形的右侧时,丝杆梯形 槽的宽度与螺母的梯形牙左边的间隙为 B, 且 A>B。
所述两种牙形间的相互距离不相等, 是指在丝杆此长度范围内梯形槽 的中心并不位于相邻两半腰形槽的中心。
实施例⑤: 当螺母固定不动, 丝杆受向左的作用力时, 为滚动摩擦, 此时螺母上的梯形牙与丝杆上的梯形槽不接触, 即梯形螺纹不起作用; 当 丝杆受向右的作用力时, 丝杆向右运动, 此时 A滚动体 2在丝杆长度方向 上与半腰形槽不接触,. ¾'P A滚动体 2不起作用, 螺母的梯形牙 ½丝杆的梯 形槽接触, 此时梯形螺纹起作用, 丝杆工作时为滑动摩擦。
同理, 如图 8所示, 丝杆受向右的作用力为滚动摩擦, 受向左的作用 力为滑动摩擦。
实施例⑥: 同样能实现一滚一滑功能的一种的方案, 即如图 7所示。 该实施例与上述实施例⑤不相同的是, 在实施例⑤的螺母中, 梯形牙和圆 形牙是交叉在一起的, 而本实施例中螺母的螺纹是分开的, 一种牙形在前, 另一种牙形在后。
结构四: 将上述结构一、 结构二和结构三结合起来使用, 在螺母不变 的情况下, 同一根丝杆上实现多个不同的功能区域, 即通过加大梯形槽的 宽度, 或加大圆形槽的宽度, 或改变两种牙形槽的宽度和两种牙形间的相 互距离, 实现在丝杆的不同长度区域内, 具有双向滑动摩擦、 双向滚动摩 擦或一滚一滑的不同功能区域。 以下用三种结合方式表述。
结合方式一: 结构一和结构三结合
组合螺旋副 A的特征是: 与丝杆 3配合使用的 A螺母 1不变, 丝杆 3 的圆形槽呈半腰形, 丝杆上分双向滑动摩擦和一滚一滑的两种功能区域。
结合方式二: 结构二和结构三结合
组合螺旋副 A的特征是: 与丝杆 3配合使用的 A螺母 1不变, 丝杆 3 的梯形槽大于螺母的梯形牙, 丝杆上分双向滚动摩擦和一滚一滑的两种功 能区域。
结合方式三: 结构一、 结构二和结构三结合
组合螺旋副 A的特征是: 与丝杆 3配合使用的 A螺母 1不变, 丝杆上 分双向滑动摩擦、 双向滚动摩擦和一滚一滑的三种功能区域。
二、 丝杆的牙形槽的宽度是不变的
牙形槽丝杆 4是具有双牙, 其中一牙通过 B滚动体 5与 B螺母 6构成 滚动螺旋传动, 另一牙与滑动螺母构成滑动螺旋传动, 丝杆的牙形槽的宽 度或大小不变。 以下将丝杆上滚动螺旋传动的牙形和滑动螺旋传动的牙形 分别用圆形牙和梯形牙表述。
组合螺旋副 A中的丝杆在长度方向其两种牙形槽的宽度不变, 与牙形 槽丝杆 4配合使用的组合螺母是由 A滑动螺母 8、 A滚动螺母 6、 销钉 9、 A 平面轴承 7和 B滚动体 5组成, 其中 A滚动螺母 6与 A滑动螺母 8在丝杆 长度方向间有 A平面轴承 7,销钉 9位于在滚动螺母和滑动螺母之间,滚动 螺母或滑动螺母上开有销槽, 销钉与滑动螺母或滚动螺母固连, 销钉可在 销槽内运动, 组合螺母是通过改变 A滚动螺母 6与 A滑动螺母 8之间的距 离, 即改变其圆形牙与梯形牙之间的距离, 实现丝杆带动螺母向上运动时 是滚动摩擦, 向下运动时是滑动摩擦的功能。
在压力角满足自锁的条件下, 这种组合螺母中的 A滑动螺母 8和丝杆 是自锁的。 销钉 9在销槽 10内的两极限位置, 分别对应组合螺旋副中滚动 摩擦和滑动摩擦的两种状态。
实施例⑦
一、滑动摩擦变为滚动摩擦的过程。
假设原始位置如图 9所示, A平面轴承 7与 A滚动螺母 6无间隙, B滚 动体 5在丝杆长度方向与丝杆的半腰形槽无接触, 销钉 9在销槽 10内对应 的位置图为图 14,力 F通过 A滚动螺母 6传递至滚动体作用于滑动螺母 8, 即此时组合螺母处于滑动摩擦状态。 丝杆旋转时, 由于 A滑动螺母 8与牙 形槽丝杆 4的滑动摩擦力矩远大于其与 A平面轴承 7的滚动摩擦力矩, 所 以 A滑动螺母 8与丝杆 4无相对位移跟随丝杆 4一起转动, 销钉 9在销槽 10内由右向左移动, 丝杆 4的半腰形槽底部逐渐接触 B滚动体 5, 带动滚 动螺母 6向上运动, 使平面轴承 7与 A滚动螺母 6产生间隙, 销钉 9在销 槽 10内运动至图 13所示的位置, 由于销钉的作用, 滑动螺母随 A滚动螺 母 6—起向上运动。 由于 A滑动螺母 8的质量忽略不计, 此时 B滚动体 5 起作用, 向下作用力 F由 A滚动螺母 6承受, 所以此时是滚动摩擦。
二、 滚动摩擦变为滑动摩擦的过程。
假设原、始位置如图 10所示, A平面轴承 7与 A滚动螺母 6有间亂 B' 滚动体 5在丝杆长度方向与丝杆的半腰形槽底部接触, 销钉 9在销槽 10内 对应的位置图为图 13, A滑动螺母 8不承受力?, 即此时组合螺母处于滚动 摩擦状态。 丝杆反向旋转开始时, 牙形槽丝杆 4带 A动滑动螺母 8—起转 动, 即牙形槽丝杆 4与 A滑动螺母 8无相对位移, 使销钉 9在销槽 10内由 左向右移动, A滚动螺母 6向下运动, 逐渐使其与 A平面轴承 7接触, 牙形 槽丝杆 4继续旋转, B滚动体 5逐渐与牙形槽丝杆 4的半腰形槽的底部脱离, 即在丝 F长度方向与半腰形槽无接触, 力 F通过 A滚动螺母 6经 A平面轴 承 7作用于 A滑动螺母 8,此时销钉 9在销槽 10内运动至图 14所示的位置, 由于销钉 9的作用, A滚动螺母 6随 A滑动螺母 8随一起向下运动。 此时 B 滚动体 5不起作用, 向下作用力 F由 A滑动螺母 8.承受, 所以此时是滑动 摩擦。
滚动体可以是滚珠或滚柱。
实施例⑧
如图 11、 12所示, 滚动螺母是镶嵌在滑动螺母内, 该实施例的原理与 实施例⑦相同, 此处不再描述。
组合螺旋副 B
组合螺旋副 B是指丝杆滚动牙的牙形槽和滑动牙的牙形槽相同, 在说 明书中统一用半腰形槽表述。 组合螺旋副 B其特征是: 丝杆的牙形槽是半 腰形槽。
组合螺旋副 B中, 与半腰形槽丝杆 14相配合的组合螺母由 B滑动螺母 19、 B滚动螺母 16、 销钉 9、 B平面轴承 17和 C滚动体 15组成, 其中 B滚 动螺母 16与 B滑动螺母 19在丝杆长度方向间有 B平面轴承 17, 销钉位于 在 B滚动螺母和 B滑动螺母之间, B滚动螺母或 B滑动螺母上开有销槽,销 钉与 B滑动螺母或8滚动螺母固连, 销钉可在销槽内运动, 组合螺母是通 过改变 B滑动螺母 19与 B滚动螺母 16间的距离, 即改变两种不同牙形相 互间的距离, 实现丝杆带动螺母向上运动时是滚动摩擦, 向下运动时是滑 动摩擦的功能
实施例⑨
一、 滑动摩擦变为滚动摩擦的过程。
假设原始位置如图 16所示, B平面轴承 17与 B滚动螺母 16无间隙, C 滚动体 15在丝杆长度方向与丝杆的半腰形槽无接触, 销钉 9在销槽 10内 对应的位置图为图 14,力 F通过 B滚动螺母 16传递至滚动体作用于 B滑动 螺母 19, 即此时组合螺母处于滑动摩檫状态。半腰形槽丝杆 14旋转时, 由 于 B滑动螺母 19与半腰形槽丝杆 14的滑动摩擦力矩远大于其与 B平面轴 承 17的滚动摩擦力矩, 所以 B滑动螺母 19与半腰形槽丝杆 14无相对位移 跟随半腰形槽丝杆 14一起转动, 销钉 9在销槽 10内由右向左移动, 半腰 形槽丝杆 14的半腰形槽底部逐渐接触 C滚动体 15, 带动 B滚动螺母 16向 上运动, 使 B平面轴承 17与 B滚动螺母 16产生间隙, 销钉在销槽内运动 至图 13所示的位置, 由于销钉 9的作用, B滑动螺母 19随 B滚动螺母 16 一起向上运动。 由于滑动螺母 19的质量忽略不计, 此时 C滚动体 15起作 用, 向下作用力 F由 B滚动螺母 16承受, 所以此时是滚动摩擦。
二、 滚动摩擦变为滑动摩擦的过程。
假设原始位置如图 17所示, B平面轴承 17与 B滚动螺母 16有间隙, C 滚动体 15在丝杆长度方向与丝杆的半腰形槽底部接触, 销钉 9在销槽 10 内对应的位置图为图 13, B滑动螺母 19不承受力 F, 即此时组合螺母处于 滚动摩擦状态。丝杆反向旋转开始时,半腰形槽丝杆 14带动 B滑动螺母 19 一起转动, 即半腰形槽丝杆 14与 B滑动螺母 19无相对位移, 使销钉 9在 销槽 10内由左向右移动, B滚动螺母 16向下运动,逐渐使其与 B平面轴承 17接触, 半腰形槽丝杆 14继续旋转, C滚动体 15逐渐与半腰形槽丝杆 14 的半腰形槽的底部脱离, 即在丝杆长度方向与半腰形槽无接触,力 F通过 B 滚动螺母 15经 B平面轴承 17作用于 B滑动螺母 19, 此时销钉 9在销槽 10 内运动至图 14所示的位置, 由于销钉 9的作用, B滚动螺母 16随 B滑动螺 母 19随一起向下运动。 此时 C滚动体 15不起作用, 向下作用力 F由 B滑 动螺母 19承受, 所以此时是滑动摩擦。
实施例⑩
如图 18、 19所示, 滚动螺母是镶嵌在滑动螺母内, 该实施例的原理与 实施例⑨相同, 此处不再描述。

Claims

权利 要 求 书
1、 组合螺旋副, 其特征是由两种螺旋副组成的, 其中一种是滚动螺旋 副, 通过滚动体使丝杆与螺母形成滚动摩擦, 另一种是滑动螺旋副, 丝杆 与螺母形成滑动摩擦。
2、 根据权利要求 1所述的组合螺旋副, 其特征是滚动螺旋副与滑动螺 旋副中丝杆的牙形槽不相同, 在同一长度范围内, 两种螺旋副的螺紋交叉 在一起的。
3、 根据权利要求 1所述的组合螺旋副, 其特征是在滚动螺旋副与滑动 螺旋副中的丝杆只有一种牙形槽, 丝杆的牙形槽是半腰形槽。
4、 根据权利要求 2所述的组合螺旋副, 其特征是: 在丝杆的不同长度 区域内, 通过加大丝杆滑动槽的宽度, 实现双向滚动摩擦功能。
5、 根据权利要求2所述的组合螺旋副, 其特征是: 在丝杆的不同长度 区域内, 通过加大丝杆滚动槽的宽度, 实现双向滑动摩擦功能。
6、 根据权利要求 2所述的组合螺旋副, 其特征是: 在丝杆的不同长度 区域内, 通过改变丝杆滑动槽和滚动槽的宽度及滑动槽和滚动槽相互间的 距离, 实现一滚一滑的功能。
7、 根据权利要求 2所述的组合螺旋副, 其特征是: 通过加大丝杆滑动 槽的宽度, 或加大丝杆滚动槽的宽度, 或改变丝杆滑动槽和滚动槽的宽度 及滑动槽和滚动槽相互间的距离, 实现在同一根丝杆的不同长度区域上分 别具有双向滚动摩擦、 双向滑动摩擦或一滚一滑的不同功能区域。
8、 根据权利要求 2所述的组合螺旋副, 其特征是: 通过加大丝杆滑动 槽的宽度, 或改变丝杆滑动槽和滚动槽的宽度及滑动槽和滚动槽相互间的 距离, 实现在同一根丝杆的不同长度区域上分别具有双向滚动摩擦、 '一滚 一滑的不同功能区域。
9、 根据权利要求 2所述的组合螺旋副, 其特征是: 通过加大丝杆滚动 槽的宽度, 或改变丝杆滑动槽和滚动槽的宽度及滑动槽和滚动槽相互间的 距离, 实现在同一根丝杆的不同长度区域上分别具有双向滑动摩擦、 一滚 一滑的不同功能区域。
10、 根据权利要求 2所述的组合螺旋副, 其特征是: 通过加大丝杆滚 动槽的宽度, 或加大丝杆滑动槽的宽度, 实现在同一根丝杆的不同长度区 域上分别具有双向滑动摩擦、 双向滚动摩擦的不同功能区域。
11、 根据权利要求 2所述的组合螺旋副, 其特征是所述的滚动螺旋副 与滑动螺旋副中丝杆的牙形槽宽度不变, 与牙形槽丝杆(4)配合使用的组 合螺母是由 A滑动螺母(8)、 A滚动螺母(6)、销钉(9)、 A平面轴承(7) 和 B滚动体(5)组成, A滚动螺母(6)与 A滑动螺母(8)在丝杆长度方 向间有 A平面轴承(7), 销钉(9)位于在 A滚动螺母和 A滑动螺母之间, A滚动螺母或 A滑动螺母上开有销槽(10), 销钉与 A滑动螺母或 A滚动 螺母固连, 销钉在销槽内运动, 组合螺母是通过改变在丝杆长度方向两螺 母间的距离, 实现丝杆带动螺母向上运动时是滚动摩擦, 向下运动时是滑 动摩擦的功能。
12、 根据权利要求 3所述的组合螺旋副, 其特征是所述的在滚动螺旋 副与滑动螺旋副中的丝杆只有一种牙形槽, 丝杆的牙形槽是半腰形槽, 与 半腰形槽丝杆(14)相配合的组合螺母是由 B滑动螺母(19)、 B滚动螺母
( 16)、 销钉(9)、 B平面轴承(17)和 C滚动体(15)组成, B滚动螺母 ( 16)与 B滑动螺母(19)在丝杆长度方向间有 B平面轴承(17),销钉(9) 位于滚动螺母和滑动螺母之间, B滚动螺母或 B滑动螺母上开有销槽( 10), 销钉与 B滑动螺母或 B滚动螺母固连, 销钉在销槽内运动, 组合螺母是通 过改变在丝杆长度方向 B滚动螺母和 B滑动螺母间的距离, 实现丝杆带动 螺母向上运动时是滚动摩擦, 向下运动时是滑动摩擦的功能。
PCT/CN2010/001830 2009-11-16 2010-11-15 组合螺旋副 WO2011057479A1 (zh)

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DE4141460A1 (de) * 1991-12-12 1993-06-17 Mannesmann Ag Druckmittelbetriebener arbeitszylinder
JP2007120579A (ja) * 2005-10-26 2007-05-17 Mitsubishi Heavy Ind Ltd ボールねじ、射出成形機

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Publication number Priority date Publication date Assignee Title
DE4141460A1 (de) * 1991-12-12 1993-06-17 Mannesmann Ag Druckmittelbetriebener arbeitszylinder
JP2007120579A (ja) * 2005-10-26 2007-05-17 Mitsubishi Heavy Ind Ltd ボールねじ、射出成形機

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