Ball screw pair locking structure

Abstract

The utility model relates to ball screw technical field discloses ball screw pair locking structure, including screw rod and sliding mechanism, sliding mechanism includes sliding ring, and the inboard of sliding ring is provided with sliding groove, and the radial sliding cooperation of sliding groove has the gasket that constitutes by many pieces wedge unit, the screw thread connection of screw is established on the sliding ring, and the gasket is abutted by screw end portion, and the even locking screw rod is passed through extruding gasket. Ball screw pair locking structure still includes the lubricating mechanism that sets up in the outside of screw rod around, lubricating mechanism includes hollow cylinder shape's protective housing, steel ball, connecting head, taper head, connecting rod and springback subassembly, press connecting head can make taper head open release lubricating oil, and springback subassembly makes it automatic reset seal. The utility model passes through the even locking of wedge gasket, has reached the effect that no gap transmission and rigid reinforcement, and lubricating mechanism can effectively reduce abrasion and automatic seal.

Description

Technical Field

[0001] This utility model relates to the field of ball screw technology, and in particular to a locking structure for ball screw pairs. Background Technology

[0002] Ball screw pairs, as a highly efficient transmission component, are widely used in CNC machine tools, precision instruments, and automated equipment. Their core function is to accurately convert rotary motion into linear motion. In many high-precision positioning applications, such as load holding of vertical axes or vibration resistance during machining, the system not only requires ball screw pairs for precise transmission but also demands that they be able to be instantly and reliably locked after stopping.

[0003] Therefore, ball screw assemblies typically require a locking mechanism. The main purpose of this locking mechanism is to eliminate system backlash, provide sufficient braking torque to prevent the screw from shifting under external forces (such as gravity), and greatly improve the rigidity of the entire transmission chain to ensure the stability of machining or measurement.

[0004] However, some existing locking structures have shortcomings in achieving the locking effect. For example, some locking methods that use lateral single-point clamping or end-face friction often result in uneven distribution of the locking force applied to the lead screw. This localized and uneven pressure makes it difficult for the locking element to fully fit with the outer circumference of the lead screw, resulting in persistent transmission backlash after locking. This leads to poor overall rigidity enhancement of the system and ultimately affects the positioning accuracy and stability of the equipment.

[0005] Therefore, this utility model proposes a ball screw pair locking structure to overcome the shortcomings of the prior art. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a ball screw pair locking structure, which aims to improve the problems of uneven locking force distribution and difficulty in effectively eliminating transmission backlash in the existing ball screw pair locking structure.

[0007] This utility model provides a ball screw pair locking structure, including a lead screw and a sliding mechanism; the sliding mechanism includes a sliding ring; the sliding mechanism is slidably connected to the outside of the lead screw; a sliding groove is provided on the inner side of the sliding ring; a washer is radially slidably fitted into the sliding groove of the sliding ring, the washer is composed of multiple wedge-shaped units, the design of the wedge-shaped units helps to generate a more uniform locking force during radial compression; a screw is threadedly connected to the sliding ring, the end of the screw abuts against the outside of the washer, and is used to apply a thrust to make the washer wedge-shaped units grip the lead screw.

[0008] Preferably, a pressure sensor is fixedly connected to the top of the sliding ring. The sensing end of the pressure sensor is used to detect the tightness of the gasket in real time, providing data reference for adjusting the locking force.

[0009] Preferably, the sliding mechanism further includes a fixed ring, which is fixedly connected to the outside of the sliding ring and is used to drive the sliding ring to slide synchronously along the lead screw, thereby enhancing the overall rigidity of the sliding mechanism.

[0010] Preferably, both ends of the lead screw are connected to a fixing head, which is used to connect and install the ball screw pair locking structure with external equipment.

[0011] Preferably, a lubrication mechanism is provided around the outer side of the lead screw to lubricate the friction interface between the lead screw and the sliding mechanism; the lubrication mechanism includes a hollow cylindrical protective shell, the inner wall of which rotatably accommodates steel balls, which are used to evenly apply lubricating oil to the surface of the lead screw during rotation.

[0012] Preferably, the lubrication mechanism further includes a connector, a conical head, and a connecting rod, which together constitute a transmission assembly for pressing out oil; the connector is slidably inserted inside the protective shell, the conical head is fixedly connected to the inner end of the connector, and the conical head is used to block the lubricating oil outlet under normal conditions; one end of the connecting rod is fixedly connected to the conical head.

[0013] Preferably, the lubrication mechanism further includes a spring-loaded assembly connected to the end of the connecting rod away from the conical head, for providing automatic reset power after pressing.

[0014] Preferably, the rebound assembly includes a housing, a limiting ring, and a spring, which together constitute an elastic reset device; the limiting ring is slidably disposed inside the housing; the end of the connecting rod abuts against the limiting ring to transmit pressure; the two ends of the spring abut against the limiting ring and the bottom end inside the housing, respectively; the spring stores elastic energy after being compressed so that it can release energy after pressing to reset and seal the conical head.

[0015] This utility model has the following beneficial effects: 1. This utility model solves the problem that existing locking structures are difficult to achieve uniform preload and eliminate the backlash in ball screw drives by setting a gasket composed of multiple wedge-shaped units and applying radial compressive force with screws, thereby achieving the technical effects of achieving backlash-free transmission and rigidity enhancement.

[0016] 2. This utility model solves the problem of locking force adjustment relying on experience and being difficult to control precisely by fixing a pressure sensor to the top of the sliding ring. It achieves the technical effect of real-time monitoring of the tightness of the gasket and ensuring locking accuracy and reliability. At the same time, by installing a protective shell lubrication mechanism with rolling steel balls on the outside of the lead screw, it solves the problem of easy wear and reduced accuracy due to long-term friction between the locking structure and the lead screw. It achieves the technical effect of continuous oil supply during friction, reducing wear and preventing corrosion.

[0017] 3. This utility model solves the problems of easy oil leakage and contamination by traditional lubrication structures by designing a press-triggered connector, a conical head, and a spring-returning rebound component. It achieves the technical effect of releasing lubricating oil on demand and automatically sealing the oil port when not in operation. At the same time, it integrates a high-precision locking structure with a self-closing lubrication system, which solves the complexity of needing to maintain two systems independently in traditional designs. It achieves the technical effects of compact structure, high functional integration, and convenient maintenance. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the ball screw pair locking structure proposed in this utility model. Figure 2 This is a schematic diagram of the fixing ring structure of the ball screw pair locking structure proposed in this utility model; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 A schematic diagram of the protective shell structure for the ball screw pair locking structure proposed in this utility model; Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0019] Legend: 1. Lead screw; 2. Fixed head; 3. Sliding mechanism; 31. Fixed ring; 32. Sliding ring; 33. Pressure sensor; 34. Screw; 35. Washer; 4. Lubrication mechanism; 41. Protective shell; 42. Steel ball; 43. Connector; 44. Conical head; 45. Connecting rod; 46. Springback assembly; 461. Housing; 462. Limiting ring; 463. Spring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example: Reference Figures 1 to 5 This utility model provides a ball screw pair locking structure, which aims to solve the problems of uneven locking leading to transmission clearance, insufficient rigidity, and severe friction and wear in existing ball screw pair locking structures.

[0022] like Figures 1 to 3As shown, the device includes a lead screw 1 and a sliding mechanism 3 slidably connected to the outside of the lead screw 1. The sliding mechanism 3 includes a sliding ring 32, and a pressure sensor 33 is fixedly connected to the top of the sliding ring 32. The sensing end of the pressure sensor 33 is used to detect the tightness of the gasket 35. A sliding groove is provided on the inner side of the sliding ring 32, and a gasket 35 composed of multiple wedge-shaped units is radially slidably fitted in the sliding groove. A screw 34 is threaded onto the sliding ring 32, and the end of the screw 34 abuts against the outside of the gasket 35. The sliding mechanism 3 also includes a fixing ring 31, which is fixedly connected to the outside of the sliding ring 32. Both ends of the lead screw 1 are connected to fixing heads 2.

[0023] It also includes a lubrication mechanism 4, and the lubrication mechanism 4 and the aforementioned lead screw 1 form a specific structural fit and connection relationship.

[0024] Reference Figure 1 , Figure 4 and Figure 5 The lubrication mechanism 4 surrounds the outer side of the lead screw 1. The lubrication mechanism 4 includes a hollow cylindrical protective shell 41. The inner wall of the protective shell 41 rotatably accommodates a steel ball 42. The lubrication mechanism 4 also includes a connector 43, a conical head 44, and a connecting rod 45. The connector 43 is slidably inserted inside the protective shell 41. The conical head 44 is fixedly connected to the inner end of the connector 43. One end of the connecting rod 45 is fixedly connected to the conical head 44. The lubrication mechanism 4 also includes a spring-loaded assembly 46. The spring-loaded assembly 46 is connected to the end of the connecting rod 45 away from the conical head 44.

[0025] like Figure 5 As shown, the rebound assembly 46 includes a housing 461, a limiting ring 462, and a spring 463. The limiting ring 462 is slidably disposed inside the housing 461. The end of the connecting rod 45 abuts against the limiting ring 462. The two ends of the spring 463 abut against the limiting ring 462 and the bottom of the inner interior of the housing 461, respectively. This press-type self-sealing lubrication structure ensures that the lead screw 1 and the sliding mechanism 3 can be effectively lubricated during long-term operation, reducing friction and wear.

[0026] A pressure sensor 33 is fixedly connected to the top of the sliding ring 32. The sensing end of the pressure sensor 33 detects the tightness of the gasket 35 in real time and provides data feedback for the tightening degree of the adjusting screw 34. The sliding mechanism 3 also includes a fixed ring 31, which is fixedly connected to the outside of the sliding ring 32 and is used to drive the sliding ring 32 to slide synchronously along the lead screw 1. Both ends of the lead screw 1 are connected to fixed heads 2. A lubrication mechanism 4 is arranged around the outside of the lead screw 1. The lubrication mechanism 4 includes a hollow cylindrical protective shell 41. An oil storage groove is opened inside the protective shell 41. The inner wall of the protective shell 41 rotatably accommodates steel balls 42. The steel balls 42 are used to carry the lubricating oil out of the oil storage groove. The lubrication mechanism 4 also includes a connector 43 for pressing out oil, a conical head 44, and a connecting rod 45. The connector 43 is slidably inserted inside the protective shell 41. The conical head 44 is fixedly connected to the inner end of the connector 43 and is used to block the oil outlet. One end of the connecting rod 45 is fixedly connected to the conical head 44.

[0027] The lubrication mechanism 4 also includes a spring-loaded assembly 46, which is connected to the end of the connecting rod 45 away from the conical head 44. The spring-loaded assembly 46 includes a housing 461, a limiting ring 462 slidably disposed inside the housing 461, and a spring 463. The end of the connecting rod 45 abuts against the limiting ring 462, and the two ends of the spring 463 abut against the limiting ring 462 and the bottom of the inner end of the housing 461, respectively. The spring 463 provides a restoring force to keep the conical head 44 in a sealed state under normal conditions.

[0028] The implementation principle of this application embodiment is as follows: When it is necessary to lock the lead screw 1 or eliminate transmission backlash, the operator can rotate the screw 34. The screw 34 is threadedly connected to the sliding ring 32 and abuts against the outer side of the washer 35. The screw 34 will push the washer 35, which is composed of multiple wedge-shaped units, so that the washer 35 slides radially in the sliding groove of the sliding ring 32, moves inward and is evenly pressed against the outer peripheral surface of the lead screw 1. The lead screw 1 is locked by friction, achieving the purpose of backlash-free transmission and rigidity enhancement. During this process, the sensing end of the pressure sensor 33 fixedly connected to the top of the sliding ring 32 detects the tightness of the washer 35 in real time, providing data basis for adjustment. The fixed ring 31 is fixedly connected to the sliding ring 32, driving the entire sliding mechanism 3 to slide along the lead screw 1. The fixed head 2 is connected to both ends of the lead screw 1 for docking with external equipment.

[0029] The lubrication mechanism 4 surrounds the lead screw 1. The hollow cylindrical structure of the protective shell 41 has an oil reservoir inside to store lubricating oil. The steel balls 42, which are rotatably housed on the inner wall of the protective shell 41, carry the lubricating oil to the surface of the lead screw 1 for basic lubrication when they roll. When active lubrication is required, the connector 43 is pressed, and the connector 43 slidably passes through the inside of the protective shell 41, driving the fixedly connected conical head 44 to slide inward. The conical head 44 pushes the spring-loaded component through the connecting rod 45. The limiting ring 462 inside the housing 461 slides inside the housing 461 and compresses the spring 463. At this time, the sealing end of the conical head 44 is disengaged from the valve port of the protective housing 41, and the lubricating oil can flow out from the gap at the bottom of the connector 43. When the connector 43 is released, the spring 463 rebounds and abuts against the limiting ring 462. The limiting ring 462 pushes the conical head 44 and the connector 43 to reset through the connecting rod 45. The conical head 44 re-seals the outlet to prevent the lubricating oil from flowing out.

[0030] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A ball screw pair locking structure, including a screw (1) and a sliding mechanism (3) slidably connected to the outside of the screw (1); The sliding mechanism (3) includes a sliding ring (32); Its features are, The inner side of the sliding ring (32) is provided with a sliding groove, and a gasket (35) composed of multiple wedge-shaped units is radially slidably fitted in the sliding groove. A screw (34) is threaded onto the sliding ring (32), and the end of the screw (34) abuts against the outer side of the gasket (35).

2. The ball screw pair locking structure according to claim 1, characterized in that, A pressure sensor (33) is fixedly connected to the top of the sliding ring (32), and the sensing end of the pressure sensor (33) is used to detect the tightness of the gasket (35).

3. The ball screw pair locking structure according to claim 1, characterized in that, The sliding mechanism (3) further includes a fixing ring (31), which is fixedly connected to the outside of the sliding ring (32).

4. The ball screw pair locking structure according to claim 1, characterized in that, Both ends of the lead screw (1) are connected to fixed heads (2).

5. The ball screw pair locking structure according to claim 1, characterized in that, The lead screw (1) is also surrounded by a lubrication mechanism (4), which includes a hollow cylindrical protective shell (41) and a steel ball (42) rotatably accommodated on the inner wall of the protective shell (41).

6. The ball screw pair locking structure according to claim 5, characterized in that, The lubrication mechanism (4) also includes a connector (43), a conical head (44), and a connecting rod (45). The connector (43) is slidably inserted inside the protective shell (41), the conical head (44) is fixedly connected to the inner end of the connector (43), and one end of the connecting rod (45) is fixedly connected to the conical head (44).

7. The ball screw pair locking structure according to claim 6, characterized in that, The lubrication mechanism (4) further includes a spring-loaded assembly (46) connected to one end of the connecting rod (45) away from the conical head (44).

8. The ball screw pair locking structure according to claim 7, characterized in that, The rebound assembly (46) includes a housing (461), a limiting ring (462) slidably disposed inside the housing (461), and a spring (463). The end of the connecting rod (45) abuts against the limiting ring (462), and the two ends of the spring (463) abut against the limiting ring (462) and the inner bottom of the outer shell (461), respectively.

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