A linear guide rail with adjustable tightness

Abstract

The present invention discloses a linear guide rail with adjustable tightness, belonging to the technical field of conveying devices, which includes an adjusting bolt, a moving tightening block, a variable guide rail and a driving slider. The driving slider is connected to the upper part of the variable guide rail in a transmission manner. The moving tightening blocks are arranged in pairs and are connected to the driving slider in a transmission manner. A threaded hole is formed in the lower side of the driving slider, and the adjusting bolt is inserted into the threaded hole. One end of the adjusting bolt abuts against the surface of the driving slider. The present invention solves the problem in the prior art that the distance between the ball and the slider cannot be adjusted due to the ball slider, which affects the transmission accuracy, and improves the versatility, practicability and universality of the guide rail.

Description

Technical Field

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

[0002] On automated production equipment machines, guide rails and sliders are generally used in cooperation to complete precise transmission.

[0003] Common precision sliders mostly use ball guide rails, and the precision of common guide rail sliders is fixed. If the balls cannot contact the guide rail, the entire transmission cannot be achieved. This leads to the need to disassemble the entire machine equipment after the slider is installed on the machine, and then replace the entire set of guide rails according to the required precision, which greatly increases the labor and maintenance costs.

[0004] Therefore, how to provide a linear guide rail with adjustable tightness to solve the defect that the existing ball sliders cannot adjust the precision is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0005] For this reason, the present invention provides a linear guide rail with adjustable tightness to solve the problem of affecting the transmission accuracy caused by the inability to adjust the distance between the balls and the slider in the prior art.

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

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

[0008] A variable guide rail, with a driving slider connected to the upper part for transmission;

[0009] Moving tightening blocks, arranged in pairs and connected to the driving slider for transmission;

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

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

[0012] A storage plate, with a plurality of connecting blocks installed at the bottom, and rectangular holes and the threaded hole are opened on two of the connecting blocks;

[0013] Chutes, arranged in pairs, are opened on the bottom surface of the storage plate, the chutes are communicated with the rectangular holes, and the moving tightening blocks are connected to the chutes and rectangular holes for transmission;

[0014] Mounting holes are opened on the movable tightening block and the connecting block. A clamping plate is also installed on the movable tightening block and the connecting block. A ball is drivingly connected in the mounting hole.

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

[0016] In a possible implementation manner, 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 component is installed in the connecting box. One end of the propulsion component is inserted into the threaded hole, and the other end of the propulsion component extends upward into the installation space. The two propulsion components are connected by an annular rack. A driving gear is also installed in the annular rack. A rotating rod is inserted into the driving gear. A driving disk is installed at the bottom of the rotating rod. A baffle is drivingly connected to the side of the storage plate.

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

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

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

[0020] A driven gear, which is sleeved outside the driving shaft. The annular rack is arranged outside the driven gear.

[0021] In a possible implementation manner, the end of the moving rod is provided with a tapered head. The supporting gear, the driving gear and the moving rod are of helical tooth structure.

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

[0023] A mounting block, the side of which is an arc structure. Displacement grooves are opened on the side of the mounting block. The displacement grooves are arranged in pairs. Chute are arranged on the upper and lower sides of the displacement grooves. A number of limiting springs are installed in the chute. A circular groove is opened in the mounting block;

[0024] A limiting block, which is installed at one end of the limiting spring;

[0025] Top blocks, which are arranged in pairs and are drivingly connected in the displacement grooves. The limiting 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, and the other end passes through the mounting block and a knob is installed at the end;

[0027] A number of driving components, which are installed on the round rod.

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

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

[0030] Conical top blocks, arranged in pairs and drivingly connected in the round holes;

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

[0032] In a possible implementation, a slideway is opened on the inner surface of the installation block, translation rods are installed on the front and rear surfaces of the top block, the translation rods are drivingly connected in the slideway, and a return spring is installed between the slideway and the translation rods.

[0033] After the driving slider of the present invention 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 balls are in contact with the variable guide rail. If there is a situation where they are not closely fitted, the adjusting bolt is rotated with a screwdriver, and the adjusting bolt drives the moving tightening block to displace towards the variable guide rail, so that the balls gradually approach the variable guide rail, completing the close fitting between the variable guide rail and the balls. When the moving tightening block can no longer move, the distance from the variable guide rail to the balls can also be changed to make the balls fit with the variable guide rail, thereby realizing precise transmission and improving the practicability and versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0035] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present invention can be implemented. Therefore, they do not have technical substance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention.

[0036] Figure 1 Is a three-dimensional view of the linear guide rail with adjustable tightness provided by the present invention;

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

[0038] Figure 3 Cross-sectional view of the storage board provided by the present invention;

[0039] Figure 4 Three-dimensional view of the baffle provided by the present invention;

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

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

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

[0043] Figure 8 Cross-sectional view of the 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 drive assembly; 321 mounting box; 322 drive spring; 323 partition board; 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 drive slider; 41 chute; 42 clamping plate; 43 mounting hole; 44 connecting block; 45 storage board; 46 driving gear; 47 rotating rod; 48 driving disc; 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. Specific embodiments

[0045] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0046] Please refer to Figures 1-8 , and now a linear guide rail with adjustable tightness disclosed by the present invention will be described. The present invention consists of four parts, as shown in Figure 1 , including an adjusting bolt 1, a moving tightening block 2, a variable guide rail 3 and a drive slider 4. A drive slider 4 is drivingly connected above the variable guide rail 3. The moving tightening blocks 2 are arranged in pairs and are drivingly connected in the drive slider 4. A threaded hole is opened on the lower side of the drive slider 4, and an adjusting bolt 1 is inserted into the threaded hole. One end of the adjusting bolt 1 abuts against the surface of the drive slider 4.

[0047] When the present invention is in use, the driving slider 4 is pushed along the variable guide rail 3. After being pushed into the variable guide rail 3, first, it is judged whether the balls in the driving slider 4 are in close contact with the side surface of the mounting block 36. If not, by driving the adjusting bolt 1 to move along the threaded hole, the end of the adjusting bolt 1 will abut against the moving tightening block 2 and move in the direction of the side surface of the mounting block 36. The moving tightening block 2 will drive the balls to approach and closely adhere to the side surface of the mounting block 36. At this time, the balls will move along the mounting hole 43 under the action of friction. At the same time, when the balls are moving, they will drive the driving slider 4 to move along the variable guide rail 3. However, during the movement of the moving tightening block 2, the moving distance of the moving tightening block 2 is limited. If the moving tightening block 2 is far away from the connecting block 44, the mounting hole 43 between the moving tightening block 2 and the connecting block 44 will be disconnected, resulting in the balls being unable to move along the mounting hole 43. The method of rotating the adjusting bolt 1 is to rotate the driving disc 48, 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 operate, 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, while driving the moving rod 492 to rotate, it will move inward into the threaded hole. When the tapered head moves inward, it will gradually approach the card slot at the end of the adjusting bolt 1. When the tapered 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 tapered head until the tapered head is inserted into the slot of the adjusting bolt 1, and then through the continuous rotation and propulsion of the adjusting bolt 1, the adjusting bolt 1 is driven to rotate. Since the moving 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, by rotating the knob, the driving assembly 32 is rotated along the circular groove. When rotated by a certain angle, under the action of the driving spring 322, the tapered top block 324 is pushed out of the round hole, so that the tapered top block 324 abuts against the top block 33 and moves outward, so that the top block 33 abuts 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 at the same time can also make the connection between the driving slider 4 and the variable guide rail 3 closer.

[0048] In a specific embodiment, such as Figure 2, the driving slider 4 includes a chute 41, a clamping plate 42, a mounting hole 43, a connecting block 44 and a storage plate 45. A number of connecting blocks 44 are installed at the bottom of the storage plate 45. Among them, two connecting blocks 44 are provided with a rectangular hole and a threaded hole. The chutes 41 are arranged in pairs and are opened on the bottom surface of the storage plate 45. The chute 41 is communicated with the rectangular hole. The moving and tightening block 2 is drivingly connected in the chute 41 and the rectangular hole. The mounting hole 43 is opened on the moving and tightening block 2 and the connecting block 44. The moving and tightening block 2 and the connecting block 44 are also installed with a clamping plate 42. A ball is drivingly connected in the mounting hole 43. The design of the chute 41 is not only convenient for the movement of the moving and tightening block 2, but also can limit the moving distance of the moving and tightening block 2. The function of the clamping plate 42 is to cooperate with the mounting hole 43. Because the part of the mounting hole 43 on the surfaces of the connecting block 44 and the moving and tightening block 2 is only an arc, in order to prevent the ball from falling, it is necessary to use the clamping plate 42 for cooperation. In the figure, the clamping plate 42 can be disassembled into two parts and are respectively arranged at the two mounting holes 43. In this way, the ball can slide along the arc structure and the side surface of the top block 33 respectively 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. Making the adjusting bolt 1 with PU polyurethane material has the characteristics of a wide hardness range, oil and water resistance, and strong wear resistance. The external thread structure is used to cooperate with the threaded hole.

[0050] In a specific embodiment, such as Figures 3-4 , an installation space 412 is opened inside the storage plate 45. 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 into the threaded hole, and 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 disc 48 is installed at the bottom of the rotating rod 47. A baffle 413 is drivingly connected to the side of the storage plate 45. The installation space 412 is provided for placing the annular rack 411, the driving gear 46 and the driven gear 495. The inner surface of the annular rack 411 is a straight rack structure and meshes with the driving gear 46 and the driven gear 495. The driving gear 46 and the driven gear 495 are straight rack structures. The baffle 413 is slidably connected in the storage plate 45. In this way, after the components in the installation space 412 are installed, the baffle 413 can be slid out for dust prevention.

[0051] In a specific embodiment, such as Figure 5, the 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 connection box 410, and the supporting gear 493 is also installed in the connection box 410. The driving gear 491 is sleeved on the driving shaft 494. The moving rod 492 is meshed and connected between the supporting gear 493 and the driving gear 491. The driven gear 495 is sleeved outside the driving shaft 494. The annular rack 411 is arranged outside 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, preventing the moving rod 492 from slipping off.

[0052] In a specific embodiment, a tapered 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 helical tooth structure. The type of the tapered head is determined according to the cross groove or the flat groove at the end of the adjusting bolt 1, so that the tapered head can be perfectly inserted into the groove to perform the rotation operation of the adjusting bolt 1. Through the helical tooth design of the supporting gear 493, the driving gear 491 and the moving rod 492, only the supporting gear 493 and the driving gear 491 rotate, and the moving rod 492 rotates. Due to the helical teeth, during the rotation process, a translational movement will also occur. Moreover, the helical tooth design has stability and can prevent the moving rod 492 from falling out between the two gears.

[0053] In a specific embodiment, such as Figure 6, the variable guide rail 3 includes a round rod 31, a driving assembly 32, a top block 33, a limiting block 34, a limiting spring 35 and a mounting block 36. The side of the mounting block 36 is of an arc structure, and a displacement groove is formed on the side of the mounting block 36. The displacement grooves are arranged in pairs, and sliding grooves are arranged on the upper and lower sides of the displacement grooves. A number of limiting springs 35 are installed in the sliding grooves. A circular groove is formed in the mounting block 36. The limiting block 34 is installed at one end of the limiting spring 35. The top blocks 33 are arranged in pairs and are drivingly connected in the displacement groove. The limiting block 34 abuts against the upper and lower sides of the top block 33. One end of the round rod 31 is inserted into the mounting block 36, and the other end passes through the mounting block 36 and a knob is installed at the end. A number of driving assemblies 32 are installed on the round rod 31. While the top block 33 moves outwards, the top block 33 will push the limiting block 34 to move along the sliding groove, and the limiting spring 35 will continue to be compressed, so that the limiting block 34 is closely attached to the top block 33 to prevent the entry of external impurities. The surface of the limiting block 34 that fits with the top block 33 is an inclined surface, which can better fit the top block 33. The inclined surface design of the top block 33 is for the ball to increase the contact area with the top block 33. The limiting spring 35 will always be in a compressed state to always stick to the top block 33. The displacement groove is provided to enable the movement of the top block 33. The arc structure is provided to increase the contact area between the mounting block 36 and the ball. When the top block 33 is in the storage state, it is convenient for the installation of the driving slider 4.

[0054] In a specific embodiment, such as Figure 7 , the driving assembly 32 includes a mounting box 321, a driving spring 322, a partition 323 and a conical top block 324. A partition 323 is installed inside the mounting box 321. Round holes are formed on the side wall of the mounting box 321. The conical top blocks 324 are arranged in pairs and are drivingly connected in the round holes. The driving spring 322 is installed between the conical top block 324 and the partition 323. When the conical top block 324 is in contact with the inner surface of the circular groove, the driving spring 322 is in a compressed state. After rotating the round rod 31 by driving the knob, when the conical top block 324 is facing the round hole, the elastic force of the driving spring 322 pushes the conical top block 324 outwards, so that the end face of the conical top block 324 abuts against the top block 33, causing the top block 33 to move outwards. The round hole is a frustum structure. With such a design, when the knob rotates back, the conical top block 324 can move along the side surface of the frustum to retract.

[0055] In a specific embodiment, such as Figure 8, a slideway 361 is formed on the inner surface of the mounting block 36, translation rods 331 are mounted on the front and rear surfaces of the top block 33, the translation rods 331 are drivingly connected in the slideway 361, and a return spring 332 is mounted between the slideway 361 and the translation rods 331. The design of the slideway 361 is for the movement of the translation rods 331, thereby causing the top block 33 to move. 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, under the action of the elastic force of the return spring 332, it drives the translation rods 331 to reset, thereby realizing the reset of the top block 33.

[0056] Although the present invention has been described in detail above with general descriptions and specific embodiments, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required 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); 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 drive components (32) mounted on the round rod (31); 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).

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: 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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