A forklift mast bearing

Abstract

The present invention discloses a forklift gantry bearing, belonging to the technical field of bearings. The forklift gantry bearing comprises an outer ring, a reversing output mechanism is fixedly connected to the outer ring, an inner ring is rotatably connected to the outer ring, a measuring mechanism is arranged on the outer ring, the measuring mechanism comprises a reversing output mechanism, a detachable screw and an indicating block, the reversing output mechanism comprises a protective shell fixedly connected to the outer ring, a second bevel gear is rotatably connected to the protective shell, an input shaft is fixedly connected to the second bevel gear, and a driven gear is fixedly connected to one end of the input shaft away from the second bevel gear. By arranging the measuring mechanism on the bearing, the rotation of the bearing is converted into the movement of the indicating block, and the wear degree of the bearing can be judged by the position of the indicating block on the indicating scale, thereby avoiding safety accidents caused by serious bearing wear. At the same time, the use of the detachable screw greatly facilitates the reset operation of the indicating block.

Description

Technical Field

[0001] The invention belongs to the technical field of bearings, and in particular relates to a forklift door frame bearing. Background Art

[0002] The forklift mast refers to the part of the forklift frame structure that supports and fixes the fork arm. It is an important part of the forklift, carrying the weight of the fork arm and the cargo, and providing support and stability. The forklift mast is usually composed of multiple mast sections, which are connected together by sliders and sliding guides so that the mast can be extended and retracted between different sections. The bearings provide support and sliding functions in these sliding guides, allowing the mast sections to be extended and retracted smoothly. Forklift mast bearings usually need to have a certain load-bearing capacity, wear resistance and corrosion resistance.

[0003] Since forklift mast bearings need to have load-bearing capacity, they need to be replaced after long-term use. However, it is usually difficult to judge the degree of wear of the bearings through external inspection. Therefore, the current treatment method is to replace them regularly. This results in many bearings being replaced before they reach their use limit, causing waste. If they are not replaced regularly, during the use of the forklift, if the bearings are severely worn and break, safety accidents are likely to occur, endangering the lives of workers. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a forklift mast bearing.

[0005] The technical solution adopted to solve the above technical problems is: a forklift mast bearing, comprising an outer ring, a reversing output mechanism is fixedly connected to the outer ring, an inner ring is rotatably connected inside the outer ring, a measuring mechanism is arranged on the outer ring, the measuring mechanism comprises a reversing output mechanism, a detachable screw rod and an indicating block, the reversing output mechanism comprises a protective shell fixedly connected to the outer ring, a second bevel gear is rotatably connected inside the protective shell, an input shaft is fixedly connected to the second bevel gear, and a driven gear is fixedly connected to one end of the input shaft away from the second bevel gear;

[0006] The inner ring comprises an inner sleeve rotatably connected to the outer ring, baffles are fixedly connected to both ends of the inner sleeve, a gear ring is fixedly connected to the surface of the baffle, and the gear ring and the driven gear are meshed with each other;

[0007] A first bevel gear is rotatably connected in the protective shell, a rotating inner shaft is rotatably connected in the protective shell, a plurality of fixed columns are fixedly connected in the protective shell, a collar is fixedly connected to one end of the fixed column away from the protective shell, a third bevel gear is rotatably connected to the fixed column, and a detachable screw is fixedly connected to one end of the rotating inner shaft away from the second bevel gear.

[0008] Through the above technical solution, the rotation of the bearing is converted into the movement of the indicating block. The degree of wear of the bearing can be judged by the position of the indicating block on the indicating scale, thereby avoiding safety accidents caused by severe bearing wear. At the same time, the use of the detachable screw greatly facilitates the resetting operation of the indicating block.

[0009] Furthermore, a plurality of steel balls are arranged between the outer ring and the inner ring, and a limit frame is sleeved on the outer side of the steel balls, a pair of sliding rods are fixedly connected to the side of the protective shell close to the detachable screw rod, an indicating block is slidably connected to the sliding rod, an indicating ruler is fixedly connected to the side of the protective shell close to the indicating block, a plurality of scales are fixedly connected to the indicating ruler, an outer shell is fixedly connected to the protective shell, a retaining ring is fixedly connected to the end of the outer shell away from the protective shell, the detachable screw rod passes through the rotatably connected retaining ring, and a transparent window is opened on the outer shell.

[0010] Through the above technical solution, the indicating block can be moved along the sliding rod to avoid the indicating block swinging and causing inaccurate indication. At the same time, the indicating block can be protected by the shell, and the indicating block can be easily observed by setting the transparent window.

[0011] Furthermore, a first inner ratchet is fixedly connected inside the first bevel gear, a plurality of first grooves are formed on one end of the rotating inner shaft close to the first bevel gear, a first ratchet is rotatably connected inside the first groove, a first spring is fixedly connected inside the first groove, the first spring is fixedly connected to the first ratchet, and a second inner ratchet is fixedly connected inside the second bevel gear.

[0012] Through the above technical solution, the first bevel gear can push the rotating inner shaft to rotate when the rotation direction is correct, and when the direction is wrong, the cooperation between the first inner ratchet and the first ratchet tooth can avoid interfering with the rotation of the rotating inner shaft.

[0013] Furthermore, a plurality of second grooves are provided at one end of the rotating inner shaft close to the second inner ratchet, a second ratchet is rotatably connected in the second groove, a second spring is fixedly connected in the second groove, the second spring is fixedly connected to the second ratchet, the second ratchet is meshed with the second inner ratchet, and the first ratchet is meshed with the first inner ratchet.

[0014] Through the above technical solution, the second bevel gear can push the rotating inner shaft to rotate when the rotation direction is correct. When the direction is wrong, the cooperation between the second inner ratchet and the second ratchet can avoid interfering with the rotation of the rotating inner shaft.

[0015] Furthermore, the first bevel gear and the third bevel gear are meshed with each other, the third bevel gear and the second bevel gear are meshed with each other, the second inner ratchet and the first inner ratchet are arranged in the same direction, and the rotating inner shaft passes through the rotating connecting ring.

[0016] Through the above technical scheme, when the inner ring rotates, the inner sleeve drives the baffle to rotate, the gear ring on the baffle drives the driven gear to rotate, the driven gear drives the input shaft to rotate, and the input shaft drives the second bevel gear to rotate. At this time, since the protective shell is fixed on the outer ring, the fixed column and the sleeve ring can be regarded as a fixed setting, so that the second bevel gear drives the third bevel gear to rotate, and the third bevel gear drives the multifunctional first bevel gear to rotate in the opposite direction. Since the second inner ratchet on the second bevel gear and the first inner ratchet on the first bevel gear are set in the same direction, during the rotation of the second bevel gear and the first bevel gear, there is always an inner ratchet and the ratchet teeth meshing with each other, that is, when the first inner ratchet gear meshes with the first ratchet teeth, the first bevel gear drives the rotating inner shaft to rotate, and the second inner ratchet gear pushes away the second ratchet teeth. When the second inner ratchet gear meshes with the second ratchet teeth, the second bevel gear drives the rotating inner shaft to rotate, and the first inner ratchet gear pushes away the first ratchet teeth, so that the rotating inner shaft always rotates in one direction.

[0017] Furthermore, the detachable screw rod includes a fixed half screw rod fixedly connected to the rotating inner shaft, the fixed half screw rod is fixedly connected to a pair of slide rails at one end close to the rotating inner shaft, the pair of slide rails are T-shaped, a movable half screw rod is slidably connected to the slide rails, a filling block is arranged between the slide rails and the movable half screw rod, the filling block is fixedly connected to a limiting plate at one end away from the rotating inner shaft, and a pull ring is fixedly connected to one end of the limiting plate away from the filling block.

[0018] Through the above technical solution, by using the detachable screw rod, the filling block can be taken out when the indicator block is reset, so that the movable half screw rod moves along the slide rail close to the fixed half screw rod, and contacts the threaded connection between the detachable screw rod and the screw cylinder, so that the indicator block can be quickly reset without rotating the detachable screw rod, thereby greatly improving the reset efficiency. When the bearing rotates, the rotating inner shaft is rotated in one direction through the reversing output mechanism, and the rotating inner shaft drives the detachable screw rod to rotate. The detachable screw rod cooperates with the screw cylinder to drive the sliding block to move along the slide rod.

[0019] Furthermore, the inner sides of the slide rail and the movable half screw rod are provided with limiting grooves, the filling block is provided with a fixing hole, a third spring is arranged in the fixing hole, and both ends of the third spring are fixedly connected with pins.

[0020] Through the above technical solution, when you want to reset the indicator block, you need to pull out the filling block through the pull ring to retract the pin into the fixed hole, release the lock between the filling block and the movable half screw rod and the fixed half screw rod, and then move the movable half screw rod along the slide rail close to the fixed half screw rod, release the threaded connection between the screw cylinder and the detachable screw rod, and facilitate the quick reset of the indicator block. When the reset is completed, insert the filling block, so that the third spring pushes the pin into the limit groove, expands the movable half screw rod and the fixed half screw rod, and allows the detachable screw rod to be threadedly connected to the screw cylinder again.

[0021] Furthermore, the indicating block comprises a sliding block slidably connected to a sliding rod, a screw cylinder is fixedly connected inside the sliding block, the screw cylinder and the detachable screw rod are threadedly matched with each other, an indicating ruler is slidably connected through the sliding block, and a magnifying glass is fixedly connected to the sliding block.

[0022] Through the above technical solution, the magnifying glass on the indicating block moves on the surface of the indicating ruler, which facilitates the reading of the scale. When the sliding block moves to the farthest end, it means that the wear degree of the bearing has reached the limit and needs to be replaced.

[0023] The beneficial effects of the present invention are as follows: (1) The present invention provides a measuring mechanism on the bearing, and the gear ring on the inner ring cooperates with the driven gear, so that the rotation of the bearing is converted into the movement of the indicator block. The wear degree of the bearing can be judged by the position of the indicator block on the indicator scale, thereby avoiding safety accidents caused by serious bearing wear; (2) The present invention uses a detachable screw, so that the filling block can be taken out when the indicator block is reset, so that the movable half screw moves along the slide rail close to the fixed half screw, and contacts the threaded connection between the detachable screw and the screw cylinder, so that the indicator block can be quickly reset without rotating the detachable screw, which greatly improves the reset efficiency; (3) The present invention uses a reversing output mechanism, so that no matter which direction the bearing rotates, it can be converted into rotation in the same direction, thereby driving the detachable screw to rotate in one direction, so that the indicator block can move along the indicator scale, and the wear degree of the bearing can be accurately determined by the cooperation of the magnifying glass and the scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is an overall structural diagram of a forklift gantry bearing of the present invention;

[0025] Figure 2 yes Figure 1 A magnified image of point A;

[0026] Figure 3 It is a rear view of a forklift mast bearing of the present invention;

[0027] Figure 4 It is a bearing internal structure diagram of a forklift gantry bearing of the present invention;

[0028] Figure 5 It is an exploded view of a forklift gantry bearing of the present invention;

[0029] Figure 6 It is a diagram of the internal structure of a measuring mechanism of a forklift mast bearing of the present invention;

[0030] Figure 7 It is an overall structural diagram of a measuring mechanism of a forklift gantry bearing of the present invention;

[0031] Figure 8 It is a screw rod structure diagram of a forklift gantry bearing of the present invention;

[0032] Fig. 9 It is a structural diagram of a reversing output mechanism of a forklift gantry bearing of the present invention;

[0033] Fig.10 This is an exploded view of a screw rod of a forklift gantry bearing according to the present invention from a first perspective;

[0034] Fig.11 It is a cross-sectional view of a reversing output mechanism of a forklift mast bearing of the present invention;

[0035] Fig.12 This is an exploded view of a screw rod of a forklift gantry bearing according to the present invention from a second perspective;

[0036] Fig.13 It is a three-dimensional diagram of the rotating inner shaft of a forklift mast bearing of the present invention;

[0037] Fig.14 It is a partial stereoscopic diagram of a reversing output mechanism of a forklift mast bearing of the present invention;

[0038] Fig.15 The invention discloses a structure diagram of an indicator block of a forklift gantry bearing.

[0039] Figure numerals: 1, outer ring; 2, inner ring; 21, inner sleeve; 22, baffle; 23, gear ring; 3, limit frame; 4, steel ball; 5, reversing output mechanism; 51, protective shell; 52, fixing column; 53, sleeve ring; 54, first bevel gear; 55, second bevel gear; 56, first inner ratchet; 57, second inner ratchet; 58, third bevel gear; 59, rotating inner shaft; 510, first groove; 511, first spring; 512, first ratchet; 513, second groove; 514, second spring Spring; 515, second ratchet; 6, removable screw; 61, fixed half screw; 62, slide rail; 63, movable half screw; 64, filling block; 65, limit plate; 66, pull ring; 67, fixing hole; 68, third spring; 69, limit groove; 610, ball; 7, input shaft; 8, driven gear; 9, indicator block; 91, sliding block; 92, screw cylinder; 93, magnifying glass; 10, indicator ruler; 11, slide rod; 12, retaining ring; 13, housing; 14, scale; 15, transparent window. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0041] like Figure 1-Figure 15As shown, a forklift mast bearing of this embodiment includes an outer ring 1, on which a measuring mechanism is provided. The measuring mechanism includes a reversing output mechanism 5, a detachable screw rod 6 and an indicating block 9.

[0042] A plurality of steel balls 4 are arranged between the outer ring 1 and the inner ring 2, and a limit frame 3 is sleeved on the outer side of the steel balls 4. A pair of sliding rods 11 are fixedly connected to the side of the protective shell 51 close to the detachable screw rod 6, and an indicating ruler 10 is fixedly connected to the side of the protective shell 51 close to the indicating block 9. A plurality of scales 14 are fixedly connected to the indicating ruler 10, and an outer shell 13 is fixedly connected to the protective shell 51. A retaining ring 12 is fixedly connected to the end of the outer shell 13 away from the protective shell 51, and the detachable screw rod 6 penetrates the rotatably connected retaining ring 12. A transparent window 15 is opened on the outer shell 13, and the setting of the transparent window 15 makes it convenient to observe the readings.

[0043] like Figure 2-Figure 5 As shown, the inner ring 2 is rotatably connected to the outer ring 1, and the inner ring 2 includes an inner sleeve 21 rotatably connected to the outer ring 1. Both ends of the inner sleeve 21 are fixedly connected to baffles 22, and the surface of the baffle 22 is fixedly connected to a ring gear 23. The ring gear 23 and the driven gear 8 are meshed with each other. When the inner ring 2 rotates, the ring gear 23 drives the driven gear 8 to rotate, and the driven gear 8 drives the input shaft 7 to rotate.

[0044] like Figure 8 and Fig.10 As shown, the end of the rotating inner shaft 59 away from the second bevel gear 55 is fixedly connected to the detachable screw rod 6, and the detachable screw rod 6 includes a fixed half screw rod 61 fixedly connected to the rotating inner shaft 59, and the end of the fixed half screw rod 61 close to the rotating inner shaft 59 is fixedly connected to a pair of slide rails 62, and the pair of slide rails 62 are arranged in a T shape. A moving half screw rod 63 is slidably connected to the slide rail 62, and a filling block 64 is arranged between the slide rail 62 and the moving half screw rod 63, and the filling block 64 is away from the rotating inner shaft 59. One end is fixedly connected to a limit plate 65, and the end of the limit plate 65 away from the filling block 64 is fixedly connected to a pull ring 66. The filling block 64 is pulled out through the pull ring 66, so that the pin 610 is retracted into the fixed hole 67, and the lock between the filling block 64 and the movable half screw rod 63 and the fixed half screw rod 61 is released. Then, the movable half screw rod 63 is moved along the slide rail 62 close to the fixed half screw rod 61, and the threaded connection between the screw cylinder 92 and the detachable screw rod 6 is released, so that the indicator block 9 can be quickly reset.

[0045] The inner sides of the slide rail 62 and the movable half screw rod 63 are provided with limiting grooves 69, and the filling block 64 is provided with a fixing hole 67. A third spring 68 is arranged in the fixing hole 67. Both ends of the third spring 68 are fixedly connected with a ball 610. When the resetting is completed, the filling block 64 is inserted to make the third spring 68 push the ball 610 into the limiting groove 69, so as to open the movable half screw rod 63 and the fixed half screw rod 61, so that the detachable screw rod 6 is threadedly connected to the screw cylinder 92 again.

[0046] like Fig. 9 and Figure 11-Figure 14 As shown, a reversing output mechanism 5 is fixedly connected to the outer ring 1, and the reversing output mechanism 5 includes a protective shell 51 fixedly connected to the outer ring 1, a second bevel gear 55 is rotatably connected in the protective shell 51, an input shaft 7 is fixedly connected to the second bevel gear 55, and an end of the input shaft 7 away from the second bevel gear 55 is fixedly connected to a driven gear 8, a first bevel gear 54 is rotatably connected in the protective shell 51, a rotating inner shaft 59 is rotatably connected in the protective shell 51, a plurality of fixed columns 52 are fixedly connected in the protective shell 51, an end of the fixed column 52 away from the protective shell 51 is fixedly connected to a collar 53, a third bevel gear 58 is rotatably connected to the fixed column 52, and an end of the rotating inner shaft 59 away from the second bevel gear 55 is fixedly connected to a detachable screw 6, and the input shaft 7 drives the second bevel gear 55 to rotate. At this time, since the protective shell 51 is fixed to the outer ring 1, The fixed column 52 and the collar 53 can be regarded as a fixed setting, so that the second bevel gear 55 drives the third bevel gear 58 to rotate, and the third bevel gear 58 drives the multifunctional first bevel gear 54 to rotate in the opposite direction. Since the second inner ratchet 57 on the second bevel gear 55 and the first inner ratchet 56 on the first bevel gear 54 are set in the same direction, during the rotation of the second bevel gear 55 and the first bevel gear 54, there is always an inner ratchet and the ratchet teeth meshing with each other, that is, when the first inner ratchet 56 meshes with the first ratchet teeth 512, the first bevel gear 54 drives the rotating inner shaft 59 to rotate, and the second inner ratchet 57 pushes away the second ratchet teeth 515. When the second inner ratchet 57 meshes with the second ratchet teeth 515, the second bevel gear 55 drives the rotating inner shaft 59 to rotate, and the first inner ratchet 56 pushes away the first ratchet teeth 512, so that the rotating inner shaft 59 always rotates in one direction.

[0047] A first inner ratchet 56 is fixedly connected inside the first bevel gear 54, and a plurality of first grooves 510 are provided at one end of the rotating inner shaft 59 close to the first bevel gear 54. A first ratchet 512 is rotatably connected inside the first groove 510, and a first spring 511 is fixedly connected inside the first groove 510. The first spring 511 is fixedly connected to the first ratchet 512, and a second inner ratchet 57 is fixedly connected inside the second bevel gear 55. The first bevel gear 54 can push the rotating inner shaft 59 to rotate when the rotation direction is correct. When the direction is wrong, the cooperation between the first inner ratchet 56 and the first ratchet 512 can avoid interfering with the rotation of the rotating inner shaft 59.

[0048] A plurality of second grooves 513 are provided at one end of the rotating inner shaft 59 close to the second inner ratchet 57, in which a second ratchet 515 is rotatably connected, in which a second spring 514 is fixedly connected, the second spring 514 is fixedly connected to the second ratchet 515, the second ratchet 515 and the second inner ratchet 57 are meshed with each other, and the first ratchet 512 and the first inner ratchet 56 are meshed with each other, so that the second bevel gear 55 can push the rotating inner shaft 59 to rotate when the rotation direction is correct. When the direction is wrong, the rotation of the rotating inner shaft 59 can be avoided from being interfered with by the cooperation between the second inner ratchet 57 and the second ratchet 515.

[0049] The first bevel gear 54 and the third bevel gear 58 are meshed with each other, and the third bevel gear 58 and the second bevel gear 55 are meshed with each other. The second inner ratchet 57 and the first inner ratchet 56 are arranged in the same direction. The rotating inner shaft 59 passes through the rotating connecting ring 53. Through the arrangement of the third bevel gear 58, the first bevel gear 54 and the second bevel gear 55 rotate in opposite directions.

[0050] like Fig.15 It is shown that the slide bar 11 is slidably connected with an indicating block 9, the indicating block 9 includes a sliding block 91 slidably connected to the slide bar 11, a screw cylinder 92 is fixedly connected in the sliding block 91, the screw cylinder 92 and the detachable screw rod 6 are threadedly matched with each other, an indicating ruler 10 is slidably connected in the sliding block 91, and a magnifying glass 93 is fixedly connected to the sliding block 91. The inner shaft 59 is rotated to drive the detachable screw rod 6 to rotate, and the detachable screw rod 6 cooperates with the screw cylinder 92 to drive the sliding block 91 to move along the slide bar 11, so that the magnifying glass 93 on the indicating block 9 moves on the surface of the indicating ruler 10, which is convenient for reading the scale 14. When the sliding block 91 moves to the farthest end, it means that the wear degree of the bearing has reached the limit and needs to be replaced.

[0051] The working principle of this embodiment is as follows: when the inner ring 2 rotates, the inner sleeve 21 drives the baffle 22 to rotate, the gear ring 23 on the baffle 22 drives the driven gear 8 to rotate, the driven gear 8 drives the input shaft 7 to rotate, and the input shaft 7 drives the second bevel gear 55 to rotate. At this time, since the protective shell 51 is fixed on the outer ring 1, the fixed column 52 and the sleeve ring 53 can be regarded as a fixed setting, so that the second bevel gear 55 drives the third bevel gear 58 to rotate, and the third bevel gear 58 drives the multifunctional first bevel gear 54 to rotate in the opposite direction. Since the second inner ratchet 57 on the second bevel gear 55 and the first bevel gear 54 rotate in the opposite direction, the second inner ratchet 57 on the second bevel gear 55 and the first bevel gear 54 rotate in the opposite direction. The first inner ratchet 56 on the gear 54 is arranged in the same direction, so during the rotation of the second bevel gear 55 and the first bevel gear 54, there is always an inner ratchet engaged with the ratchet teeth, that is, when the first inner ratchet 56 is engaged with the first ratchet teeth 512, the first bevel gear 54 drives the rotating inner shaft 59 to rotate, and the second inner ratchet 57 pushes away the second ratchet teeth 515; when the second inner ratchet 57 is engaged with the second ratchet teeth 515, the second bevel gear 55 drives the rotating inner shaft 59 to rotate, and the first inner ratchet 56 pushes away the first ratchet teeth 512, so that the rotating inner shaft 59 always rotates in one direction;

[0052] The inner shaft 59 is rotated to drive the detachable screw 6 to rotate. The detachable screw 6 cooperates with the screw cylinder 92 to drive the sliding block 91 to move along the sliding rod 11, so that the magnifying glass 93 on the indicating block 9 moves on the surface of the indicating ruler 10, which is convenient for reading the scale 14. When the sliding block 91 moves to the farthest end, it means that the wear degree of the bearing has reached the limit and needs to be replaced.

[0053] If you want to reset the indicator block 9, you need to pull out the filling block 64 through the pull ring 66, so that the pin 610 is retracted into the fixed hole 67, and the lock between the filling block 64 and the movable half screw rod 63 and the fixed half screw rod 61 is released. Then the movable half screw rod 63 is moved along the slide rail 62 close to the fixed half screw rod 61, and the threaded connection between the screw cylinder 92 and the detachable screw rod 6 is released, so as to facilitate the rapid reset of the indicator block 9. When the reset is completed, the filling block 64 is inserted, so that the third spring 68 pushes the pin 610 into the limit groove 69, and the movable half screw rod 63 and the fixed half screw rod 61 are stretched apart, so that the detachable screw rod 6 is threadedly connected to the screw cylinder 92 again.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A forklift mast bearing, comprising an outer ring (1), characterized in that: The outer ring (1) is fixedly connected to a reversing output mechanism (5), the inner ring (2) is rotatably connected to the inner side of the outer ring (1), a measuring mechanism is provided on the outer ring (1), the measuring mechanism comprises a reversing output mechanism (5), a detachable screw rod (6) and an indicating block (9), the reversing output mechanism (5) comprises a protective shell (51) fixedly connected to the outer ring (1), a second bevel gear (55) is rotatably connected to the inner side of the protective shell (51), an input shaft (7) is fixedly connected to the second bevel gear (55), and a driven gear (8) is fixedly connected to one end of the input shaft (7) away from the second bevel gear (55); The inner ring (2) comprises an inner sleeve (21) rotatably connected to the outer ring (1), baffles (22) are fixedly connected to both ends of the inner sleeve (21), a gear ring (23) is fixedly connected to the surface of the baffle (22), and the gear ring (23) and the driven gear (8) are meshed with each other; A first bevel gear (54) is rotatably connected inside the protective shell (51), a rotating inner shaft (59) is rotatably connected inside the protective shell (51), a plurality of fixed columns (52) are fixedly connected inside the protective shell (51), one end of the fixed column (52) away from the protective shell (51) is fixedly connected to a collar (53), a third bevel gear (58) is rotatably connected to the fixed column (52), and one end of the rotating inner shaft (59) away from the second bevel gear (55) is fixedly connected to a detachable screw rod (6); A plurality of steel balls (4) are arranged between the outer ring (1) and the inner ring (2), and the steel balls (4) are all sleeved with a limit frame (3). A pair of sliding rods (11) are fixedly connected to the side of the protective shell (51) close to the detachable screw rod (6), and an indicating block (9) is slidably connected to the sliding rod (11). A indicating ruler (10) is fixedly connected to the side of the protective shell (51) close to the indicating block (9), and a plurality of scales (14) are fixedly connected to the indicating ruler (10). The protective shell (51) is fixedly connected to an outer shell (13), and a retaining ring (12) is fixedly connected to the end of the outer shell (13) away from the protective shell (51). The detachable screw rod (6) is rotatably connected to the retaining ring (12), and a transparent window (15) is provided on the outer shell (13); The indicating block (9) comprises a sliding block (91) slidably connected to a sliding rod (11); a threaded cylinder (92) is fixedly connected inside the sliding block (91); the threaded cylinder (92) and the detachable threaded rod (6) are threadedly engaged with each other; an indicating ruler (10) is slidably connected through the sliding block (91); and a magnifying glass (93) is fixedly connected to the sliding block (91).

2. A forklift mast bearing according to claim 1, characterized in that: A first inner ratchet (56) is fixedly connected inside the first bevel gear (54); a plurality of first grooves (510) are formed at one end of the rotating inner shaft (59) close to the first bevel gear (54); first ratchet teeth (512) are rotatably connected inside the first grooves (510); a first spring (511) is fixedly connected inside the first grooves (510); the first spring (511) is fixedly connected to the first ratchet teeth (512); and a second inner ratchet (57) is fixedly connected inside the second bevel gear (55).

3. A forklift mast bearing according to claim 2, characterized in that: A plurality of second grooves (513) are formed at one end of the rotating inner shaft (59) close to the second inner ratchet (57); a second ratchet tooth (515) is rotatably connected in the second groove (513); a second spring (514) is fixedly connected in the second groove (513); the second spring (514) is fixedly connected to the second ratchet tooth (515); the second ratchet tooth (515) and the second inner ratchet (57) are meshed with each other; and the first ratchet tooth (512) and the first inner ratchet (56) are meshed with each other.

4. A forklift mast bearing according to claim 3, characterized in that: The first bevel gear (54) and the third bevel gear (58) are meshed with each other, the third bevel gear (58) and the second bevel gear (55) are meshed with each other, the second inner ratchet (57) and the first inner ratchet (56) are arranged in the same direction, and the rotating inner shaft (59) passes through the rotating connecting ring (53).

5. The forklift mast bearing according to claim 1, characterized in that: The detachable screw rod (6) comprises a fixed half screw rod (61) fixedly connected to the rotating inner shaft (59); one end of the fixed half screw rod (61) close to the rotating inner shaft (59) is fixedly connected to a pair of slide rails (62); the pair of slide rails (62) are arranged in a T-shape; a movable half screw rod (63) is slidably connected to the slide rail (62); a filling block (64) is arranged between the slide rail (62) and the movable half screw rod (63); one end of the filling block (64) away from the rotating inner shaft (59) is fixedly connected to a limit plate (65); and one end of the limit plate (65) away from the filling block (64) is fixedly connected to a pull ring (66).

6. A forklift mast bearing according to claim 5, characterized in that: The inner sides of the slide rail (62) and the movable half screw rod (63) are provided with a limiting groove (69), the filling block (64) is provided with a fixing hole (67), a third spring (68) is arranged in the fixing hole (67), and both ends of the third spring (68) are fixedly connected with a pin (610).

Images