Linear guide rail with adjustable tightness

Abstract

The invention discloses a tightness-adjustable linear guide rail, and belongs to the technical field of conveying devices, the tightness-adjustable linear guide rail comprises an adjusting bolt, movable tightening blocks, a variable guide rail and a driving slider, the driving slider is in transmission connection above the variable guide rail, the movable tightening blocks are arranged in pairs and are in transmission connection in the driving slider, and a threaded hole is formed in the side edge of the lower part of the driving slider. An adjusting bolt is inserted into the threaded hole, and one end of the adjusting bolt abuts against the surface of the driving sliding block. The problem that in the prior art, due to the fact that a ball sliding block cannot adjust the distance between a ball and the sliding block, the transmission accuracy is affected is solved, and the universality, practicability and universality of the guide rail are improved.

Description

Technical Field

[0001] The invention relates to the technical field of conveying devices, and in particular to a linear guide rail with adjustable tightness. Background Art

[0002] In automated production equipment, guide rails and sliders are generally used to achieve precision transmission.

[0003] Commonly used precision sliders mostly use ball guides, and the accuracy of commonly used guide sliders is fixed. If the ball cannot contact the guide, the entire transmission will not be realized. This means that after the slider is installed on the machine, if the accuracy and tightness need to be adjusted, the machine equipment needs to be disassembled as a whole, and then the entire guide needs to be replaced according to the required accuracy, which greatly increases labor and maintenance costs.

[0004] Therefore, how to provide a linear guide rail with adjustable tightness to solve the defect that the existing ball slider cannot adjust the accuracy is a technical problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0005] To this end, the present invention provides a linear guide rail with adjustable tightness to solve the problem in the prior art that the ball slider cannot adjust the distance between the ball and the slider, which affects the transmission accuracy.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The invention discloses a linear guide rail with adjustable tightness, comprising:

[0008] A variable guide rail with a drive slider connected to the upper transmission;

[0009] The movable tightening blocks are arranged in pairs and are transmission-connected in the driving slider;

[0010] The driving slider has a threaded hole on its lower side, an adjusting bolt is inserted into the threaded hole, and one end of the adjusting bolt is against the surface of the driving slider.

[0011] In a possible implementation, the driving slider includes:

[0012] The storage plate has a plurality of connection blocks installed at the bottom, two of which are provided with rectangular holes and the threaded holes;

[0013] Slide grooves are arranged in pairs and are opened on the bottom surface of the storage plate. The slide grooves are connected to the rectangular holes. The movable tightening block is drivingly connected between the slide grooves and the rectangular holes.

[0014] The mounting holes are arranged on the movable tightening block and the connecting block. The movable tightening block and the connecting block are also provided with clamping plates. The mounting holes are transmission-connected with balls.

[0015] In a possible implementation, the end of the adjusting bolt is made of polyurethane, and the outer surface of the adjusting bolt is an external thread structure.

[0016] In a possible implementation, an installation space is opened inside the storage plate, a connecting box is installed at the bottom of the storage plate, the connecting boxes are arranged in pairs, a propulsion assembly is installed in the connecting box, one end of the propulsion assembly is inserted in the threaded hole, and the other end of the propulsion assembly extends upward to the installation space, the two propulsion assemblies are connected by an annular rack, a driving gear is also installed in the annular rack, a rotating rod is inserted in the driving gear, a driving disk is installed at the bottom of the rotating rod, and a baffle is connected to the side of the storage plate for transmission.

[0017] In a possible implementation, the propulsion assembly includes:

[0018] A driving shaft, one end of which is installed in the connection box, a supporting gear is also installed in the connection box, and a driving gear is sleeved on the driving shaft;

[0019] A moving rod meshingly connected between the supporting gear and the driving gear;

[0020] The driven gear is sleeved on the outside of the driving shaft, and the annular rack is arranged on the outside of the driven gear.

[0021] In a possible implementation, a cone head is provided at the end of the moving rod, and the supporting gear, the driving gear and the moving rod are a helical gear structure.

[0022] In a possible implementation, the variable guide rail includes:

[0023] The mounting block has an arc-shaped side structure, a displacement groove is opened on the side of the mounting block, the displacement grooves are arranged in pairs, and slide grooves are arranged on the upper and lower sides of the displacement grooves, and a plurality of limit springs are installed in the slide grooves, and a circular groove is opened in the mounting block;

[0024] A limit block, mounted on one end of the limit spring;

[0025] The top blocks are arranged in pairs and are drivingly connected in the displacement slots, and the limit blocks abut against the upper and lower sides of the top blocks;

[0026] A round rod, one end of which is inserted into the mounting block, the other end of which passes through the mounting block, and a knob is installed at the end;

[0027] A plurality of driving components are mounted on the round rod.

[0028] In a possible implementation, the driving component includes:

[0029] An installation box, with a partition installed inside, and a circular hole opened on the side wall of the installation box;

[0030] Conical top blocks are arranged in pairs and drivingly connected in the circular holes;

[0031] A driving spring is installed between the conical top block and the partition plate.

[0032] In a possible implementation, a slideway is opened on the inner surface of the mounting block, a translation rod is installed on the front and rear surfaces of the top block, the translation rod is transmission-connected in the slideway, and a return spring is installed between the slideway and the translation rod.

[0033] After the driving slider is installed on the variable guide rail, the staff holds the driving slider and slides it on the variable guide rail to determine whether the variable guide rail is in close contact with the driving slider and whether the ball is in contact with the variable guide rail. If they are not in close contact, the adjusting bolt is rotated by a screwdriver to drive the movable tightening block to move toward the direction of the variable guide rail, so that the ball gradually approaches the variable guide rail and close contact between the variable guide rail and the ball is completed. When the movable tightening block cannot move further, the distance to the ball can be changed by the variable guide rail to make the ball fit with the variable guide rail, thereby realizing precise transmission and improving practicality and versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0035] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0036] Figure 1 A three-dimensional diagram of a linear guide rail with adjustable tension provided by the present invention;

[0037] Figure 2 A cross-sectional view of a driving slider provided by the present invention;

[0038] Figure 3 A cross-sectional view of a storage plate provided by the present invention;

[0039] Figure 4 A three-dimensional diagram of the baffle provided by the present invention;

[0040] Figure 5 A cross-sectional view of a propulsion assembly provided by the present invention;

[0041] Figure 6 A cross-sectional view of a variable guide rail provided by the present invention;

[0042] Figure 7 A cross-sectional view of a drive assembly provided by the present invention;

[0043] Figure 8 A cross-sectional view of a mounting block provided by the present invention;

[0044] In the figure: 1 adjusting bolt; 2 moving tightening block; 3 variable guide rail; 31 round rod; 32 driving assembly; 321 mounting box; 322 driving spring; 323 partition; 324 conical top block; 33 top block; 331 translation rod; 332 return spring; 34 limit block; 35 limit spring; 36 mounting block; 361 slideway; 4 driving slider; 41 slide groove; 42 clamping plate; 43 mounting hole; 44 connecting block; 45 storage plate; 46 driving gear; 47 rotating rod; 48 driving disk; 49 propulsion assembly; 491 driving gear; 492 moving rod; 493 supporting gear; 494 driving shaft; 495 driven gear; 410 connecting box; 411 annular rack; 412 mounting space; 413 baffle. DETAILED DESCRIPTION

[0045] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Please refer to Figure 1-Figure 8 Now, a linear guide rail with adjustable tightness disclosed in the present invention is described. The present invention is composed of four parts, such as Figure 1 , including an adjusting bolt 1, a movable tightening block 2, a variable guide rail 3 and a driving slider 4. The variable guide rail 3 is transmission-connected with the driving slider 4 above. The movable tightening blocks 2 are arranged in pairs and transmission-connected in the driving slider 4. A threaded hole is opened on the lower side of the driving slider 4, and an adjusting bolt 1 is inserted in the threaded hole. One end of the adjusting bolt 1 is against the surface of the driving slider 4.

[0047] When the present invention is in use, the driving slider 4 is pushed in along the variable guide rail 3. After being pushed into the variable guide rail 3, it is first determined whether the ball in the driving slider 4 is tightly fitted with the side surface of the mounting block 36. If it is not tightly fitted, the adjusting bolt 1 is driven to move along the threaded hole, and the end of the adjusting bolt 1 will press against the movable tightening block 2 and move toward the side surface of the mounting block 36, and the movable tightening block 2 will bring the ball close to and fit the side surface of the mounting block 36. At this time, the ball will move along the mounting hole 43 under the action of friction. At the same time, the ball will drive the driving slider 4 to move along the variable guide rail 3 when it moves. However, in the process of moving the movable tightening block 2, the moving distance of the movable tightening block 2 is limited. If the movable tightening block 2 is far away from the connecting block 44, the mounting hole 43 between the movable tightening block 2 and the connecting block 44 will be disconnected, resulting in the ball being unable to move along the mounting hole 43. The method for rotating the adjusting bolt 1 is to rotate the driving disk 48 to drive the rotating rod 47 to rotate and cause the driving gear 46 to rotate. The rotation of the driving gear 46 will drive the annular rack 411 to run and cause the driven gear 495 to rotate. The driven gear 495 will drive the driving shaft 494 to rotate. The rotation of the driving shaft 494 will cause the driving gear 491 to rotate. Under the simultaneous action of the driving gear 491 and the supporting gear 493, the moving rod 492 will be driven to rotate and move toward the inside of the threaded hole. When the cone head moves inward, it will gradually approach the slot at the end of the adjusting bolt 1. When the cone head just contacts the adjusting bolt 1, it cannot be inserted into the end of the adjusting bolt 1. At this time, it is necessary to continue to rotate the cone head until the cone head is inserted into the slot of the adjusting bolt 1, and then the adjusting bolt 1 is driven to rotate by continuous rotation of the adjusting bolt 1. Since the movable tightening block 2 cannot move a long distance, there is still a gap between the driving slider 4 and the variable guide rail 3. At this time, the driving assembly 32 is rotated along the circular groove by turning the knob. When it rotates to a certain angle, the conical top block 324 is pushed out of the circular hole under the action of the driving spring 322, so that the conical top block 324 moves outward against the top block 33, so that the top block 33 is against the inner side of the driving slider 4, which can effectively prevent the problem of inaccurate transmission caused by displacement when the driving slider 4 slides, and can also make the connection between the driving slider 4 and the variable guide rail 3 tighter.

[0048] In a specific embodiment, Figure 2The driving slider 4 includes a slide groove 41, a clamping plate 42, a mounting hole 43, a connecting block 44 and a storage plate 45. A plurality of connecting blocks 44 are installed at the bottom of the storage plate 45, two of which are provided with rectangular holes and threaded holes. The slide grooves 41 are arranged in pairs and are opened on the bottom surface of the storage plate 45. The slide grooves 41 are connected with the rectangular holes. The movable tightening block 2 is transmission-connected in the slide groove 41 and the rectangular holes. The mounting hole 43 is opened on the movable tightening block 2 and the connecting block 44. The clamping plate 42 is also installed on the movable tightening block 2 and the connecting block 44. The mounting hole 43 is transmission-connected with a ball. The design of the slide groove 41 is not only to facilitate the movement of the movable tightening block 2, but also to limit the moving distance of the movable tightening block 2. The function of the clamping plate 42 is to cooperate with the mounting hole 43. Because the mounting hole 43 on the connecting block 44 and the surface of the movable tightening block 2 is only an arc, in order to prevent the ball from falling, a clamping plate 42 is required to cooperate. The clamping plate 42 in the figure can be disassembled into two parts, which are respectively arranged at the two mounting holes 43, so that the ball can slide along the arc structure and the side surface of the top block 33 when in use.

[0049] In a specific embodiment, the end of the adjusting bolt 1 is made of polyurethane material, and the outer surface of the adjusting bolt 1 is an external thread structure. The adjusting bolt 1 is made of PU polyurethane material, which has the characteristics of a wide hardness range, oil resistance, water resistance, and strong wear resistance, and the external thread structure is matched with the threaded hole.

[0050] In a specific embodiment, Figure 3-Figure 4 An installation space 412 is opened inside the storage plate 45, and a connecting box 410 is installed at the bottom of the storage plate 45. The connecting boxes 410 are arranged in pairs. A propulsion assembly 49 is installed in the connecting box 410. One end of the propulsion assembly 49 is inserted in the threaded hole, and the other end of the propulsion assembly 49 extends upward to the installation space 412. The two propulsion assemblies 49 are connected by an annular rack 411. A driving gear 46 is also installed in the annular rack 411. A rotating rod 47 is inserted in the driving gear 46. A driving disk 48 is installed at the bottom of the rotating rod 47. The side of the storage plate 45 is connected to a baffle 413 for transmission. The installation space 412 is used to place the annular rack 411, the driving gear 46 and the driven gear 495. The inner surface of the annular rack 411 is a spur rack structure, which meshes with the driving gear 46 and the driven gear 495. The driving gear 46 and the driven gear 495 are spur rack structures. The baffle 413 is slidably connected to the storage plate 45. In this way, when the components in the installation space 412 are installed, the baffle 413 can be slid out to block dust.

[0051] In a specific embodiment, Figure 5The propulsion assembly 49 includes a driving gear 491, a moving rod 492, a supporting gear 493, a driving shaft 494 and a driven gear 495. One end of the driving shaft 494 is installed in the connecting box 410. The supporting gear 493 is also installed in the connecting box 410. The driving shaft 494 is sleeved with the driving gear 491. The moving rod 492 is meshed and connected between the supporting gear 493 and the driving gear 491. The driven gear 495 is sleeved on the outside of the driving shaft 494, and the annular rack 411 is arranged on the outside of the driven gear 495. When the driving gear 491 drives the moving rod 492 to move, the supporting gear 493 will be driven by the moving rod 492, and the two gears will produce a clamping effect, so that the moving rod 492 only rotates and translates on the horizontal plane to prevent the moving rod 492 from slipping.

[0052] In a specific embodiment, a cone head is provided at the end of the moving rod 492, and the supporting gear 493, the driving gear 491 and the moving rod 492 are of a helical gear structure. The type of the cone head is determined according to the cross groove or the straight groove at the end of the adjusting bolt 1, so that the cone head can be perfectly inserted into the groove to perform the rotating operation of the adjusting bolt 1. Through the helical gear design of the supporting gear 493, the driving gear 491 and the moving rod 492, the supporting gear 493 and the driving gear 491 only rotate, and the moving rod 492 rotates. Due to the helical teeth, translational motion also occurs during the rotation process, and the helical teeth are designed to be stable, which can prevent the moving rod 492 from falling out from between the two gears.

[0053] In a specific embodiment, Figure 6The variable guide rail 3 includes a round rod 31, a driving assembly 32, a top block 33, a limit block 34, a limit spring 35 and a mounting block 36. The side of the mounting block 36 is an arc-shaped structure. A displacement groove is opened on the side of the mounting block 36. The displacement grooves are arranged in pairs. Slide grooves are arranged on the upper and lower sides of the displacement grooves. A number of limit springs 35 are installed in the slide grooves. A circular groove is opened in the mounting block 36. The limit block 34 is installed at one end of the limit spring 35. The top blocks 33 are arranged in pairs and are connected in the displacement grooves. The limit block 34 is against the upper and lower sides of the top block 33. One end of the round rod 31 is inserted in the mounting block 36, and the other end passes through the mounting block 36 and is installed with a knob at the end. A number of driving assemblies 32 are installed on the round rod 31. As the top block 33 moves outward, the top block 33 will push the limit block 34 to move along the slide groove and cause the limit spring 35 to continue to compress, so that the limit block 34 is tightly attached to the top block 33 to prevent the entry of foreign matter. The surface of the limit block 34 and the top block 33 that fit together is an inclined surface, which can better fit the top block 33. The inclined surface of the top block 33 is designed to increase the contact area between the ball and the top block 33. The limit spring 35 will always remain in a compressed state in order to always stick to the top block 33. The displacement groove is used to enable the top block 33 to move, and the arc structure is used to increase the contact area between the mounting block 36 and the ball. When the top block 33 is in the storage state, it will facilitate the installation of the driving slider 4.

[0054] In a specific embodiment, Figure 7 The driving assembly 32 includes a mounting box 321, a driving spring 322, a partition 323 and a conical top block 324. The partition 323 is installed inside the mounting box 321. A circular hole is opened on the side wall of the mounting box 321. The conical top blocks 324 are arranged in pairs and are connected in the circular hole. The driving spring 322 is installed between the conical top block 324 and the partition 323. When the conical top block 324 contacts the inner surface of the circular groove, the driving spring 322 is in a compressed state. After the driving knob rotates the round rod 31, when the conical top block 324 faces the circular hole, the elastic force of the driving spring 322 pushes the conical top block 324 outward, so that the end surface of the conical top block 324 abuts against the top block 33, so that the top block 33 moves outward. The circular hole is a truncated cone structure. With such a design, when the knob is rotated, the conical top block 324 can move along the side surface of the truncated cone to be retracted.

[0055] In a specific embodiment, Figure 8A slideway 361 is provided on the inner surface of the mounting block 36, a translation rod 331 is installed on the front and rear surfaces of the top block 33, the translation rod 331 is connected in the slideway 361, and a return spring 332 is installed between the slideway 361 and the translation rod 331. The slideway 361 is designed to move the translation rod 331, thereby moving the top block 33. When the top block 33 is pushed out, the conical top block 324 drives the top block 33 to move and stretches the return spring 332. At this time, the thrust of the conical top block 324 overcomes the elastic force of the return spring 332. When the thrust of the conical top block 324 is withdrawn, the translation rod 331 is reset under the action of the elastic force of the return spring 332, thereby realizing the reset of the top block 33.

[0056] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A linear guide rail with adjustable tension, characterized in that: include: A variable guide rail (3) is connected to a driving slider (4) on the upper side; The movable tightening blocks (2) are arranged in pairs and are transmission-connected to the driving slider (4); The driving slider (4) has a threaded hole on its lower side, an adjusting bolt (1) is inserted into the threaded hole, and one end of the adjusting bolt (1) abuts against the surface of the driving slider (4).

2. The linear guide rail with adjustable tension as claimed in claim 1, characterized in that: The driving slider (4) comprises: A storage plate (45) is provided with a plurality of connection blocks (44) at the bottom, wherein two of the connection blocks (44) are provided with rectangular holes and the threaded holes; The slide grooves (41) are arranged in pairs and are opened on the bottom surface of the storage plate (45); the slide grooves (41) are connected to the rectangular hole; and the movable tightening block (2) is drivingly connected between the slide grooves (41) and the rectangular hole; The mounting hole (43) is formed on the movable tightening block (2) and the connecting block (44); a clamping plate (42) is also mounted on the movable tightening block (2) and the connecting block (44); and a ball bearing is drivingly connected in the mounting hole (43).

3. The linear guide rail with adjustable tension as claimed in claim 1, characterized in that: The end of the adjusting bolt (1) is made of polyurethane, and the outer surface of the adjusting bolt (1) is an external thread structure.

4. The linear guide rail with adjustable tension as claimed in claim 2, characterized in that: The storage plate (45) has an installation space (412) formed inside. A connection box (410) is installed at the bottom of the storage plate (45). The connection boxes (410) are arranged in pairs. A propulsion assembly (49) is installed in the connection box (410). One end of the propulsion assembly (49) is inserted into the threaded hole. The other end of the propulsion assembly (49) extends upward into the installation space (412). The two propulsion assemblies (49) are connected by an annular rack (411). A driving gear (46) is also installed in the annular rack (411). A rotating rod (47) is inserted into the driving gear (46). A driving disk (48) is installed at the bottom of the rotating rod (47). A baffle (413) is connected to the side of the storage plate (45) in a transmission manner.

5. The linear guide rail with adjustable tension as claimed in claim 4, characterized in that: The propulsion assembly (49) comprises: A driving shaft (494), one end of which is installed in the connection box (410), a supporting gear (493) is also installed in the connection box (410), and a driving gear (491) is sleeved on the driving shaft (494); A moving rod (492) meshingly connected between the supporting gear (493) and the driving gear (491); The driven gear (495) is sleeved on the outside of the driving shaft (494), and the annular rack (411) is arranged on the outside of the driven gear (495).

6. The linear guide rail with adjustable tension as claimed in claim 5, characterized in that: The end of the moving rod (492) is provided with a cone head, and the supporting gear (493), the driving gear (491) and the moving rod (492) are of a helical gear structure.

7. The linear guide rail with adjustable tension as claimed in claim 1, characterized in that: The variable guide rail (3) comprises: The mounting block (36) has an arc-shaped side structure, a displacement groove is opened on the side of the mounting block (36), the displacement grooves are arranged in pairs, and slide grooves are arranged on the upper and lower sides of the displacement grooves, and a plurality of limit springs (35) are installed in the slide grooves. A circular groove is opened in the mounting block (36); A limit block (34) is mounted on one end of the limit spring (35); The top blocks (33) are arranged in pairs and are drivingly connected in the displacement grooves, and the limit blocks (34) are against the upper and lower sides of the top blocks (33); A round rod (31), one end of which is inserted into the mounting block (36), the other end of which passes through the mounting block (36), and a knob is installed at the end; A plurality of driving components (32) are mounted on the round rod (31).

8. The linear guide rail with adjustable tension as claimed in claim 7, characterized in that: The drive assembly (32) comprises: An installation box (321) is provided with a partition (323) inside, and a circular hole is opened on a side wall of the installation box (321); Conical top blocks (324) are arranged in pairs and are drivingly connected in the circular holes; A driving spring (322) is installed between the conical top block (324) and the partition plate (323).

9. The linear guide rail with adjustable tension as claimed in claim 7, characterized in that: A slideway (361) is provided on the inner surface of the mounting block (36), a translation rod (331) is installed on the front and rear surfaces of the top block (33), the translation rod (331) is transmission-connected in the slideway (361), and a return spring (332) is installed between the slideway (361) and the translation rod (331).

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