Angle adjusting mechanism for small table board of passenger / commercial vehicle

Abstract

The utility model relates to the technical field of passenger / commercial vehicle supplies, and discloses an angle adjusting mechanism for a passenger / commercial vehicle small table board, which comprises a shell, a main shaft, a gear assembly, a ratchet wheel and pawl assembly, a worm and gear assembly and a locking / unlocking mechanism, and the shell comprises an outer shell and a core metal plate. According to the angle adjusting mechanism, the use requirement that the use angle of a small table board of a passenger / commercial vehicle is adjusted along with inclination of the chair back angle is met, the situation that the size and the structure of an existing angle adjusting device on the market are difficult to meet the use requirement is effectively solved, and stable angle adjusting and automatic unlocking can be achieved; and a torque and an unlocking structure required by angle adjustment are provided. The assembly is simple in structure and convenient to use, can be particularly applied to the fields of passenger / commercial vehicles, high-speed rails, aviation, ships and the like, can be applied to table plates, doors and windows, and can achieve angle adjustment of using components such as the table plates through locking at different angles and automatic unlocking, so that the requirements of users are met.

Description

Technical Field

[0001] The utility model relates to the fields of passenger / commercial vehicles, high-speed railways, aviation, ships, etc., and can be applied to table boards, doors and windows. Specifically, it is a mechanism for adjusting the angle of a small table board of a passenger / commercial vehicle. Background Art

[0002] A small table is usually installed behind the front seats, while MPV models with multiple rows of seats also have one installed behind the second row of seats. Food, laptops, etc. can be placed on it and can be folded when not in use, taking up no space. It is a component behind the seats, and its main function is to provide the driver and passengers with a convenient dining, office or study space.

[0003] Currently available angle adjusters on the market are either bulky and unable to meet the compact design requirements, or have too little torque to meet practical requirements. This patented technology perfectly addresses the need for a compact, high-torque mechanism that can assist in adjusting the angle of a tabletop. This device is urgently needed, requiring a compact structure and the ability to withstand high torque. This utility model provides a concrete solution to these problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention provides a mechanism for adjusting the angle of a small table in a passenger / commercial vehicle, which solves the above-mentioned problem and enables the use angle of the small table to be adjusted as the angle of the seat back changes.

[0005] The utility model provides the following technical solution: a mechanism for adjusting the angle of a small table in a passenger / commercial vehicle, comprising a housing, a main shaft, a gear assembly, a ratchet and pawl assembly, a worm gear assembly, and a locking / unlocking mechanism:

[0006] The locking / unlocking mechanism composed of a ratchet and pawl assembly and a worm gear is connected to the gear assembly. The locking / unlocking mechanism, the gear set, and the gear shaft together form a core. The core is installed inside the shell. At the same time, the main shaft connected to the core extends outside the shell and is connected to the table top connecting rod. The shell is connected to the table top frame.

[0007] The spindle comprises a left spindle member and a right spindle member, one end of the right spindle member passes through three sheet metals in sequence and is connected to the left spindle member;

[0008] The gear assembly includes a first gear, a second gear and a third gear. The first gear is mounted on the outer surface of the right main shaft member, the first gear is meshed with the second gear, the third gear is meshed with the second gear, and the third gear is rotatably mounted between two adjacent sheet metals;

[0009] The locking / unlocking mechanism includes a ratchet, a limiting hook, a pawl, a locking spring and a spring.

[0010] Preferably, a first reinforcing rib and a second reinforcing rib are fixedly mounted on the outer surface of the first sheet metal, and five holes are opened on the outer surface of the first sheet metal, namely, a first hole position of the first sheet metal, a second hole position of the first sheet metal, a third hole position of the first sheet metal, a fourth hole position of the first sheet metal, and a fifth hole position of the first sheet metal, and two positioning protrusions are provided on the outer surface of the first reinforcing rib;

[0011] The outer surface of the second sheet metal is fixedly mounted with a square groove, a fourth reinforcing rib, a fifth reinforcing rib and a sixth reinforcing rib. The outer surface of the second sheet metal is provided with five hole positions, namely, a first hole position of the second sheet metal, a second hole position of the second sheet metal, a third hole position of the second sheet metal, a fourth hole position of the second sheet metal and a fifth hole position of the second sheet metal. The outer surface of the sixth reinforcing rib is provided with a protrusion;

[0012] The outer surface of the third sheet metal is provided with a first top surface, a second top surface, a third top surface and a fourth top surface, and the outer surface of the third sheet metal is provided with six hole positions, namely, a first hole position of the third sheet metal, a second hole position of the third sheet metal, a third hole position of the third sheet metal, a fourth hole position of the third sheet metal, a fifth hole position of the third sheet metal and a sixth hole position of the third sheet metal;

[0013] Small bushings are respectively installed at the second hole position of the first sheet metal, the third hole position of the first sheet metal, the second hole position of the second sheet metal, the third hole position of the second sheet metal, and the second hole position of the third sheet metal;

[0014] Large bushings are respectively installed at the first hole position of the first sheet metal, the first hole position of the second sheet metal, and the first hole position of the third sheet metal.

[0015] Preferably, threaded holes are provided on the outer surfaces of the left spindle part and the right spindle part, and the two threaded holes are divided into a left part threaded hole and a right part threaded hole. A left part flat groove is provided at one end of the left spindle part, and an insertion head is provided at one end of the right spindle part, and the insertion head is adapted to the left part flat groove.

[0016] Preferably, the inner wall of the second shell is provided with three positioning holes, and the three positioning holes correspond to the three sheet metals respectively. The first shell and the second shell are provided with a semicircular notch on the opposite side, and the two semicircular notches are respectively a first semicircular notch and a second semicircular notch. The two semicircular notches are adapted to form a circular notch, and the circular notch is adapted to the main shaft. The outer surfaces of the first shell and the second shell are provided with multiple corresponding first shell mounting holes and second shell mounting holes.

[0017] Preferably, the second gear is stepped, comprising coarse teeth, fine teeth and two second gear mounting inner grooves;

[0018] The first gear includes first gear teeth and a first gear mounting hole;

[0019] The outer surface of the third gear is provided with a third gear flat portion, third gear teeth, a threaded screw and two third gear end inner grooves;

[0020] Circlips are installed in the two inner grooves of the third gear ends and the two inner grooves of the second gear installation;

[0021] The transmission ratio between the first gear and the fine gear is one to two, and the transmission ratio between the coarse gear and the third gear is two to one.

[0022] Preferably, the ratchet comprises a ratchet mounting hole, ratchet teeth, a ratchet stop and a ratchet head boss, and the ratchet mounting hole is mounted on the outer surface of the flat portion of the third gear.

[0023] Preferably, the pawl includes a pawl tooth position, a first pawl surface, a pawl boss, a pawl stopper, a second pawl surface and a third pawl surface;

[0024] A retaining spring is installed on the outer surface of the ratchet boss, and the ratchet boss passes through the fourth hole position of the second sheet metal and the third hole position of the third sheet metal in sequence, so that it rotates in the holes.

[0025] Preferably, the limiting hook includes a limiting hook hook, a limiting hook threaded hole, a limiting hook back side and a limiting hook hook surface. The limiting hook threaded hole is installed on the threaded screw and cooperates with it, so that the limiting hook can rotate axially and move translationally on the third gear.

[0026] Preferably, the locking spring comprises a locking spring top surface and an unlocking spring, and the unlocking spring is mounted on the outer surface of the square groove of the second sheet metal;

[0027] The spring comprises a spring straight hook and a spring bent hook, and the spring straight hook is connected to a limiting hook surface.

[0028] Preferably, a first rivet and a second rivet are provided between the first sheet metal and the third sheet metal;

[0029] The two ends of the first rivet are respectively provided with a first rivet left inner groove and a first rivet right inner groove. The first rivet left inner groove is riveted into the fourth hole position of the first sheet metal, and the first rivet right inner groove is riveted into the fourth hole position of the third sheet metal.

[0030] A second rivet left inner groove and a second rivet right inner groove are respectively provided at both ends of the second rivet. The second rivet left inner groove is riveted into the fifth hole position of the first sheet metal, and the second rivet right inner groove is riveted into the fifth hole position of the second sheet metal.

[0031] Compared with the prior art, the present invention provides a mechanism for adjusting the angle of a small table in a passenger / commercial vehicle, which has the following beneficial effects:

[0032] This angle-adjusting mechanism for passenger / commercial vehicle tray tables addresses the need for the tray table to adjust its surface angle as the seatback tilts. It also effectively addresses the problem of existing angle adjusters on the market being difficult to meet due to their size and structure. It enables stable angle adjustment and automatic unlocking, providing the torque and unlocking mechanism required for angle adjustment. It can be used on tray tables, doors, and windows, particularly in passenger / commercial vehicles, high-speed rail, aviation, and marine applications. This component can adjust the angle of components such as the tray table by locking and automatically unlocking at different angles, thus meeting user needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the final assembly according to this application.

[0034] Figure 2 It is a schematic diagram of the final assembly according to this application.

[0035] Figure 3 is a schematic diagram of an explosion according to the present application.

[0036] Figure 4 Schematic diagram of the second shell according to the present application.

[0037] Figure 5 Schematic diagram of the first shell according to the present application.

[0038] Figure 6 It is a schematic diagram of the internal structure according to this application.

[0039] Figure 7 It is a schematic diagram of the left and right main axes according to this application.

[0040] Figure 8 is a first sheet metal schematic diagram according to the present application.

[0041] Figure 9 This is a second sheet metal schematic diagram according to this application.

[0042] Figure 10 This is a third sheet metal schematic diagram according to the present application.

[0043] Figure 11 is a schematic diagram of the first gear according to the present application.

[0044] Figure 12 is a schematic diagram of a second gear according to the present application.

[0045] Figure 13 is a schematic diagram of the third gear according to the present application.

[0046] Figure 14 is a schematic diagram of a ratchet according to the present application.

[0047] Figure 15 Schematic diagram of a limit hook according to the present application.

[0048] Figure 16 is a schematic diagram of a pawl according to the present application.

[0049] Figure 17 Schematic diagram of a locking spring according to the present application.

[0050] Figure 18 This is a schematic diagram of a first rivet according to the present application.

[0051] Figure 19 is a schematic diagram of a second rivet according to the present application.

[0052] Figure 20 is a schematic diagram of a spring according to the present application.

[0053] Figure 21 is a schematic diagram of a large bushing according to the present application.

[0054] Figure 22 Schematic diagram of a small bushing according to the present application.

[0055] Figure 23 Schematic diagram of a retaining spring according to the present application.

[0056] In the picture:

[0057] 100, first housing; 100-1, second semicircular notch; 100-2, first housing mounting hole;

[0058] 200, second housing; 200-1, first semicircular notch; 200-2, second housing mounting hole; 200-3, positioning hole;

[0059] 300, spindle left piece; 300-1, left piece flat slot; 300-2, left piece threaded hole;

[0060] 400, right spindle piece; 400-1, insertion head; 400-2, threaded hole of right piece;

[0061] 500, first sheet metal; 500-1, first hole position of first sheet metal; 500-2, second hole position of first sheet metal; 500-3, third hole position of first sheet metal; 500-4, fourth hole position of first sheet metal; 500-5, fifth hole position of first sheet metal; 500-6, positioning protrusion; 500-7, first reinforcing rib; 500-8, second reinforcing rib;

[0062] 600, second sheet metal; 600-1, first hole position of second sheet metal; 600-2, second hole position of second sheet metal; 600-3, third hole position of second sheet metal; 600-4, fourth hole position of second sheet metal; 600-5, fifth hole position of second sheet metal; 600-6, square groove; 600-7, protrusion; 600-8, fourth reinforcing rib; 600-9, fifth reinforcing rib; 600-10, sixth reinforcing rib;

[0063] 700, third sheet metal; 700-1, first hole position of third sheet metal; 700-2, second hole position of third sheet metal; 700-3, third hole position of third sheet metal; 700-4, fourth hole position of third sheet metal; 700-5, fifth hole position of third sheet metal; 700-6, sixth hole position of third sheet metal; 700-7, first top surface; 700-8, second top surface; 700-9, third top surface; 700-10, fourth top surface;

[0064] 800, first gear; 800-1, first gear teeth; 800-2, first gear mounting hole;

[0065] 900, second gear; 900-1, coarse teeth; 900-2, fine teeth; 900-3, inner groove for mounting the second gear;

[0066] 1000, third gear; 1000-1, third gear teeth; 1000-2, screw rod; 1000-3, third gear flat part; 1000-4, third gear end inner groove;

[0067] 1100, ratchet; 1100-1, ratchet teeth; 1100-2, ratchet mounting hole; 1100-3, ratchet stop; 1100-4, ratchet head boss;

[0068] 1200, limit hook; 1200-1, limit hook hook; 1200-2, limit hook threaded hole; 1200-3, limit hook back; 1200-4, limit hook surface;

[0069] 1300, pawl; 1300-1, pawl tooth position; 1300-2, first pawl surface; 1300-3, pawl boss; 1300-4, pawl stopper; 1300-5, second pawl surface; 1300-6, third pawl surface;

[0070] 1400, locking spring; 1400-1, top surface of locking spring; 1400-2, unlocking spring;

[0071] 1500, first rivet; 1500-1, left inner groove of first rivet; 1500-2, right inner groove of first rivet;

[0072] 1600, second rivet; 1600-1, left inner groove of second rivet; 1600-2, right inner groove of second rivet;

[0073] 1700, spring; 1700-1, spring straight hook; 1700-2, spring curved hook;

[0074] 1800, large bushing;

[0075] 1900, small bushing;

[0076] 2000, circlip; DETAILED DESCRIPTION

[0077] See also Figure 1-23 , a mechanism for adjusting the angle of a small table for a passenger / commercial vehicle, comprising a housing, a main shaft, a gear assembly, a ratchet and pawl assembly, a worm gear assembly, and a locking / unlocking mechanism:

[0078] The locking / unlocking mechanism composed of a ratchet and pawl assembly and a worm gear is connected to the gear assembly. The locking / unlocking mechanism, the gear set, and the gear shaft together form a core. The core is installed inside the shell. At the same time, the main shaft connected to the core extends outside the shell and is connected to the table top connecting rod. The shell is connected to the table top frame.

[0079] The housing comprises a first housing 100, a second housing 200, and three sheet metals. The first housing 100 and the second housing 200 fit together to form a sealed cavity. The three sheet metals are all installed inside the sealed cavity. The three sheet metals are respectively a first sheet metal 500, a second sheet metal 600, and a third sheet metal 700. The gear assembly is installed between the first sheet metal 500 and the third sheet metal 700, and the locking / unlocking mechanism is installed between the third sheet metal 700 and the second sheet metal 600.

[0080] The spindle includes a left spindle part 300 and a right spindle part 400. One end of the right spindle part 400 passes through three sheet metals in sequence and is connected to the left spindle part 300.

[0081] The gear assembly includes a first gear 800, a second gear 900, and a third gear 1000. The first gear 800 is mounted on the outer surface of the right spindle member 400. The first gear 800 is meshed with the second gear 900. The third gear 1000 is meshed with the second gear 900. The third gear 1000 is rotatably mounted between two adjacent sheet metals.

[0082] The locking / unlocking mechanism includes a ratchet 1100 , a limiting hook 1200 , a pawl 1300 , a locking spring 1400 and a spring 1700 .

[0083] A first reinforcing rib 500-7 and a second reinforcing rib 500-8 are fixedly mounted on the outer surface of the first sheet metal 500. Five holes are formed on the outer surface of the first sheet metal 500, namely, a first hole 500-1, a second hole 500-2, a third hole 500-3, a fourth hole 500-4, and a fifth hole 500-5. Two positioning protrusions 500-6 are provided on the outer surface of the first reinforcing rib 500-7.

[0084] A square groove 600-6, a fourth reinforcing rib 600-8, a fifth reinforcing rib 600-9, and a sixth reinforcing rib 600-10 are fixedly installed on the outer surface of the second sheet metal 600. Five holes are opened on the outer surface of the second sheet metal 600, namely, a first hole position 600-1 of the second sheet metal, a second hole position 600-2 of the second sheet metal, a third hole position 600-3 of the second sheet metal, a fourth hole position 600-4 of the second sheet metal, and a fifth hole position 600-5 of the second sheet metal. A protrusion 600-7 is opened on the outer surface of the sixth reinforcing rib 600-10.

[0085] The outer surface of the third sheet metal 700 is provided with a first top surface 700-7, a second top surface 700-8, a third top surface 700-9 and a fourth top surface 700-10. The outer surface of the third sheet metal 700 is provided with six holes, namely, a first hole position 700-1 of the third sheet metal, a second hole position 700-2 of the third sheet metal, a third hole position 700-3 of the third sheet metal, a fourth hole position 700-4 of the third sheet metal, a fifth hole position 700-5 of the third sheet metal and a sixth hole position 700-6 of the third sheet metal;

[0086] Small bushings 1900 are installed in the second hole position 500-2 of the first sheet metal, the third hole position 500-3 of the first sheet metal, the second hole position 600-2 of the second sheet metal, the third hole position 600-3 of the second sheet metal, and the second hole position 700-2 of the third sheet metal respectively;

[0087] The first hole position 500 - 1 of the first sheet metal, the first hole position 600 - 1 of the second sheet metal, and the first hole position 700 - 1 of the third sheet metal are respectively installed with large bushings 1800 .

[0088] The sheet metal is composed of three plates: a first sheet metal 500, a second sheet metal 600, and a third sheet metal 700. The first sheet metal 500 primarily houses the gears, the second sheet metal 600 primarily houses the locking device, and the third sheet metal 700 stabilizes and positions the left and right sheet metals. The first reinforcing rib 500-7 cooperates with the first top surface 700-7 of the third sheet metal to ensure firmness. The second reinforcing rib 500-8 cooperates with the second top surface 700-8 of the third sheet metal to ensure firmness. The fourth, fifth, and sixth reinforcing ribs 600-8, 600-9, and 600-10 of the second sheet metal also cooperate to ensure firmness. The square groove 600-6 is the mounting location for the locking spring 1400. Small bushings 1900 are installed in holes 500-2, 500-3, and 700-2 on the three sheet metals. Large bushings 1800 are installed in the first sheet metal hole 500-1, the second sheet metal hole 600-1, and the third sheet metal hole 700-1, respectively. Large bushings 1800 are installed to support shaft parts and reduce friction, thereby increasing the service life of shaft parts. The right spindle component 300 passes through the second sheet metal hole 600-1, the third sheet metal hole 700-1, and finally through the first sheet metal hole 500-1 to improve stability. It is then installed on the flat position 300-1 of the right spindle component through the first gear mounting hole 800-2. Finally, the left spindle component is installed into the right spindle component 400 through the left component flat position slot 300-1 to position it and then weld it. The first sheet metal hole 500-4 and the third sheet metal hole 700-4 are riveted in place to ensure a secure and stable fit. Before riveting, the second gear 900 is installed into the second sheet metal hole 500-2 and the second sheet metal hole 700-2. Then, retaining springs 2000 are used to position the second gear mounting grooves 900-3 on the left and right ends of the gear shaft, limiting rotation within the grooves to six degrees of freedom. The third gear 1000 is installed into the third sheet metal hole 500-3, the second sheet metal hole 600-2, and the third sheet metal hole 700-3 to ensure a secure and stable fit. Before installation, ratchet flat 1100-2 is inserted into the third gear flat 1000-3 to limit rotation within the grooves to six degrees of freedom. Finally, retaining springs 2300 are used to position the left and right ends of shaft 3 (1000-4). The first sheet metal hole 500-4 and the third sheet metal 700-4 are riveted together to make them firm and stable. The fifth hole 500-5 of the first sheet metal, the fifth hole 600-5 of the second sheet metal, and the sixth hole 700-6 of the third sheet metal are riveted together by simultaneously passing the rivet shaft 1600 and riveting the left and right ends of the second rivet 1600, the second rivet left inner groove 1600-1 and the second rivet right inner groove 1600-2 to make them firm and stable. Ratchets are installed at the fourth hole 600-4 of the first sheet metal and the fifth hole 700-5 of the third sheet metal to unlock and lock the mechanism.

[0089] The outer surfaces of the left spindle part 400 and the right spindle part 300 are both provided with threaded holes, and the two threaded holes are divided into the left part threaded hole 400-2 and the right part threaded hole 300-2. One end of the left spindle part 300 is provided with a left part flat position groove 300-1, and one end of the right spindle part is provided with an insertion head 400-1, which is adapted to the left part flat position groove 300-1.

[0090] The left spindle part 300 and the right spindle part 400; the right spindle part 400 passes through the first sheet metal first hole 500-1, the second sheet metal first hole 600-1, the third sheet metal first hole 700-1 and the left spindle part 300 are positioned inside the sheet metal, and the left spindle part flat slot 400-1 is installed into the right spindle part 400-1, and then it is firmly installed in the sheet metal through the welding process. The spindle is mainly screwed with the small table boards of different sizes and dimensions of the customer through the threaded holes on the left and right parts. The planes of the left and right spindle parts are in a parallel state, which makes the positioning of the small table board more accurate, improves the accuracy of the rotation of the overall component, increases its service life, and improves the rotation feel, which conforms to the mechanical principles.

[0091] Three positioning holes 200-3 are provided on the inner wall of the second shell 200, and the three positioning holes 200-3 correspond to the three sheet metals respectively. Semicircular notches are provided on the opposite sides of the first shell 100 and the second shell 200, and the two semicircular notches are respectively the first semicircular notch 200-1 and the second semicircular notch 100-1. The two semicircular notches are adapted to form a circular notch, and the circular notch is adapted to the main shaft. The outer surfaces of the first shell 100 and the second shell 200 are provided with multiple corresponding first shell mounting holes 100-2 and second shell 200-2.

[0092] The housing consists of a first housing 100 and a second housing 200. The first and second housings 100 and 200 enclose the internal structure to prevent loosening and falling parts. The housing 2200 is placed at the bottom, above the first housing 100. The housing 2200 has three positioning holes 200-3, which cooperate with the positioning protrusions 500-6 and 600-7 on the sheet metal to position it on the second housing 200. After the first and second housings 100 and 200 are assembled and covered, screwing them to the customer's table panel through the two housing screw mounting holes 100-2 and mounting hole 200-2 can make the overall assembly more secure and effectively protect the internal mechanism from being affected or damaged. It can effectively protect the internal structure from being exposed. When the housings 100 and 200 cooperate with each other, the overall assembly has an aesthetically pleasing appearance, and the housings conform to the assembly structure, are strong, and have good stability in use.

[0093] The second gear 900 is stepped and includes coarse teeth 900 - 1 , fine teeth 900 - 2 and two second gear mounting inner grooves 900 - 3 ;

[0094] The first gear 800 includes a first gear tooth 800 - 1 and a first gear mounting hole 800 - 2 ;

[0095] The outer surface of the third gear 1000 is provided with a third gear flat portion 1000-3, third gear teeth 1000-1, a threaded screw 1000-2 and two third gear end inner grooves 1000-4;

[0096] The two third gear end inner grooves 1000-4 and the two second gear mounting inner grooves 900-3 are both installed with retaining springs 2000;

[0097] The transmission ratio between the first gear 800 and the fine-tooth gear 900 - 2 is one to two, and the transmission ratio between the coarse-tooth gear 900 - 1 and the third gear 1000 is two to one.

[0098] The 56-tooth position 800 of the first gear 800, 800-1, and the 28-tooth position 900 of the second gear 900, 900-2, form a gear ratio of 1:2. When the first gear 800 rotates one revolution, the second gear 900 rotates two revolutions. The first gear mounting hole 800-2 is installed in the right spindle component 400. Finally, the left spindle component 300 is installed into the flat position of the insert 400-1 through the left component flat slot 300-1 to position it and then weld it. The first gear is made of 42CrMo steel. 42CrMo steel is an ultra-high-strength steel with high strength and toughness, good hardenability, and no significant temper brittleness. After quenching and tempering, it has a high fatigue limit and multiple impact resistance, and good low-temperature impact toughness, which increases its service life and strength.

[0099] The 28-tooth position 900-2 of the second gear 900 cooperates with the 56-tooth position 800-1 of the first gear 800, creating a 2:1 transmission ratio. For every two revolutions of the second gear 900, the first gear 800 rotates once. The 56-tooth position 900-1 of the second gear 900 cooperates with the 28-tooth position 1000-1 of the third gear 1000, creating a 1:2 transmission ratio. For every one revolution of the second gear 900, the third gear 1000 rotates twice. The second gear shaft passes through the second hole 500-2 of the first sheet metal, where a small bushing 1900 is installed. The second sheet metal second hole 700-2 is then inserted into the second hole. Circlips 2000 are installed in the inner grooves 900-3 on the left and right sides of the second gear, securing them to the sheet metal to prevent movement. The second gear 900 is made of 3Cr13 material, which has moderate strength and hardness, good corrosion resistance, and is suitable for manufacturing various mechanical parts and tools, increasing their service life and strength.

[0100] The 28 teeth of third gear 1000 mate with the 56 teeth of second gear 900, resulting in a gear ratio of 2:1. When third gear 1000 rotates two times, second gear 900 rotates one turn. Third gear flat 1000-3 securely engages with ratchet inner groove 1100-2. A threaded screw 1000-2 on the third gear shaft engages with a threaded hole in a retaining hook, allowing the retaining hook to rotate on screw 1000-2, securing the gear within the third gear. Slots 1000-4 on the left and right sides of the third gear pass through the inner holes of three sheet metal plates and are secured with retaining springs. Like first gear 800, third gear 1000 is made of 42CrMo steel. 42CrMo steel is an ultra-high-strength steel characterized by high strength and toughness, good hardenability, and no significant temper brittleness. After quenching and tempering, it exhibits a high fatigue limit, resistance to multiple impacts, and excellent low-temperature impact toughness, extending its service life and strength.

[0101] The ratchet 1100 includes a ratchet mounting hole 1100-2, ratchet teeth 1100-1, a ratchet stop 1100-3 and a ratchet head boss 1100-4. The ratchet mounting hole 1100-2 is installed on the outer surface of the third gear flat part 1000-3.

[0102] The ratchet mounting hole 1100-2 of the ratchet 1100 is installed on the outer surface of the third gear flat position 1000-3. The ratchet teeth use serrated teeth. The ratchet teeth 1100-1 are mainly used to adjust the gear position. The ratchet stop 1100-3 serves as the stop of the limit hook 1200. When our mechanism starts to rotate and reaches a certain angle, the ratchet stop 1100-3 collides with the limit hook 1200-3. The limit hook 1200 rotates synchronously with the ratchet 1100, and the limit hook hook position 1200-1 The impact with the pawl stopper 1300-4 limits the position. To shift to the desired gear, the ratchet 1100 is rotated in the opposite direction to apply force, causing the pawl teeth 1300-1 to partially open the teeth. The locking spring 1400 then pushes the teeth back. When the ratchet is fully rotated, the ratchet head 1100-4 acts as an unlocking boss. This small bump allows the teeth to be opened after rotation, achieving a rotational reset. This achieves functional requirements and complies with mechanical principles.

[0103] The pawl 1300 includes a pawl stopper 1300 - 1 , a first pawl surface 1300 - 2 , a pawl boss 1300 - 3 , a pawl stopper 1300 - 4 , a second pawl surface 1300 - 5 , and a third pawl surface 1300 - 6 ;

[0104] After the top cylindrical boss 1300 of the pawl 1300 is installed into the retaining spring 2000, it passes through the sheet metal holes 600-6 and 700-3 to limit its six degrees of freedom in up, down, left and right directions, leaving only the rotational freedom to allow it to rotate inside. The pawl tooth position 1300-4 cooperates with the ratchet tooth position to achieve gear adjustment. The pawl surface 1300-5 collides with the ratchet head boss 1100-4. When the ratchet boss 1100-3 rotates and hits the pawl surface 1300-5, the pawl will open the tooth position as it is hit, so that it can be unlocked. The pawl surface 1300-2 is the unlocking surface. When the top surface 1400-1 of the locking block hits the first pawl surface 1300-2, it means that the saw teeth are already in the open state and are in the unlocked state.

[0105] A retaining spring 2000 is installed on the outer surface of the third pawl surface 1300 - 6 . The third pawl surface 1300 - 6 passes through the second sheet metal hole 600 - 4 and the third sheet metal hole 700 - 4 in sequence, so that it rotates in the holes.

[0106] The limiting hook 1200 includes a limiting hook hook 1200-1, a limiting hook threaded hole 1200-2, a limiting hook back 1200-3 and a limiting hook hook surface 1200-4. The limiting hook threaded hole 1200-2 is installed on the threaded screw 1000-2 and cooperates with it, so that the limiting hook 1200 can rotate axially and move translationally on the third gear 1000.

[0107] The main function of the limit hook 1200 is to collide the limit hook hook 1200-1 with the pawl block 1300-4, so that the two surfaces of the bottom of the pawl collide from the first pawl surface 1300-2 to the third pawl surface 1300-6. After the collision, the pawl block 1300-4 engages with the ratchet tooth 1100-1, and the unlocked state is changed to the locked state. In this way, the unlocking and locking functions are realized, which conforms to the mechanical principle.

[0108] The locking spring 1400 includes a locking spring top surface 1400 - 1 and an unlocking spring 1400 - 2 . The unlocking spring 1400 - 2 is mounted on the outer surface of the square groove 600 - 6 of the second sheet metal 600 .

[0109] The main function of the locking spring 1400 is to control the unlocking and locking of the mechanism. The unlocking spring 1400-2 is installed on the square groove 600-6 of the sheet metal 2. When the top surface 1400-1 of the locking spring presses against the bottom surface 11300-2 of the pawl, it is in the unlocked state. When the top surface 1400-1 of the locking spring presses against the bottom surface 21300-3 of the pawl, it is in the locked state.

[0110] The spring 1700 includes a spring straight hook 1700 - 1 and a spring bent hook 1700 - 2 , and the spring straight hook 1700 - 1 and a limiting hook surface 1200 - 4 .

[0111] The main function of the spring 1700 is to control the rotation of the limit hook 1200 to prevent the limit hook from rotating at will and to rebound after the limit hook 1200 collides with the pawl block 1300-4. The spring straight hook 1700-1 is hooked on the limit hook surface 1200-4, and the spring bent hook 1700-2 is hooked on the third hole 600-3 of the second sheet metal.

[0112] The ratchet stops 1100-3 and contacts the back of the limit hook 1200-3, and the ratchet drives the limit hook to rotate. After the pawl block 1300-4 contacts the limit hook hook 1200-1, the limit hook hook 1200-1 knocks down the pawl block 1300-4 to achieve mechanism locking.

[0113] The outer circle 1400-1 of the locking spring cooperates with the pawl surfaces 1300-21300-3 to control the unlocking and locking states of the pawl, forming a component that can be pressed together.

[0114] The mechanism is unlocked by the pawl surface 1300-5 and the ratchet surface 1100-4. When the ratchet surface 1100-4 rotates, it makes rotational contact with the pawl surface 1300-5. The ratchet surface 1100-4 pushes the pawl surface 1300-5 upward, and the top surface 1400-1 of the locking spring bounces from the pawl surface 1300-3 to the pawl surface 1300-2 to unlock the mechanism.

[0115] A first rivet 1500 and a second rivet 1600 are provided between the first sheet metal 500 and the third sheet metal 700;

[0116] The first rivet 1500 has a first rivet left inner groove 1500-1 and a first rivet right inner groove 1500-2 at both ends. The first rivet left inner groove 1500-1 is riveted into the fourth hole 500-4 of the first sheet metal, and the first rivet right inner groove 1500-2 is riveted into the fourth hole 700-4 of the third sheet metal.

[0117] A second rivet left inner groove 1600 - 1 and a second rivet right inner groove 1600 - 2 are respectively provided at both ends of the second rivet 1600 . The second rivet left inner groove 1600 - 1 is riveted into the fifth hole 500 - 5 of the first sheet metal, and the second rivet right inner groove 1600 - 2 is riveted into the fifth hole 600 - 5 of the second sheet metal 600 .

[0118] In summary, this angle-adjusting mechanism for a small table in a passenger / commercial vehicle solves the problem of adjusting the angle of the small table in a passenger / commercial vehicle to be parallel to the seat as the seat tilts. It also effectively addresses the complex structure and poor stability of existing angle adjusters on the market. It can achieve stable parallelism and easy unlocking during use, provide an angular rotation distance, and meet the angle parallelism requirements of an adjustment mechanism provided by the product. Especially in the field of passenger / commercial vehicles and passenger / commercial vehicle doors and windows (not limited to passenger / commercial vehicles), this component can achieve unlocking and locking according to different angle requirements, thereby meeting user needs.

Claims

1. A mechanism for adjusting the angle of a small table in a passenger or commercial vehicle, comprising a housing, a main shaft, a gear assembly, a ratchet and pawl assembly, a worm gear assembly, and a locking / unlocking mechanism, characterized in that: The locking / unlocking mechanism composed of a ratchet and pawl assembly and a worm gear is connected to the gear assembly. The locking / unlocking mechanism, the gear set, and the gear shaft together form a core. The core is installed inside the shell. At the same time, the main shaft connected to the core extends outside the shell and is connected to the table top connecting rod. The shell is connected to the table top frame. The housing comprises a first housing (100), a second housing (200) and three sheet metals, wherein the first housing (100) and the second housing (200) are matched to form a sealed cavity, and the three sheet metals are installed inside the sealed cavity, wherein the three sheet metals are respectively a first sheet metal (500), a second sheet metal (600) and a third sheet metal (700), the gear assembly is installed between the first sheet metal (500) and the third sheet metal (700), and the locking / unlocking mechanism is installed between the third sheet metal (700) and the second sheet metal (600); The main shaft comprises a main shaft left part (300) and a main shaft right part (400), and one end of the main shaft right part (400) passes through three sheet metals in sequence and is connected to the main shaft left part (300); The gear assembly includes a first gear (800), a second gear (900) and a third gear (1000). The first gear (800) is mounted on the outer surface of the main shaft right member (400). The first gear (800) is meshed with the second gear (900). The third gear (1000) is meshed with the second gear (900). The third gear (1000) is rotatably mounted between two adjacent sheet metals. The locking / unlocking mechanism comprises a ratchet (1100), a limiting hook (1200), a pawl (1300), a locking spring (1400) and a spring (1700).

2. The angle adjustment mechanism for a small table in a passenger or commercial vehicle according to claim 1, characterized in that: A first reinforcing rib (500-7) and a second reinforcing rib (500-8) are fixedly mounted on the outer surface of the first sheet metal (500); five holes are opened on the outer surface of the first sheet metal (500), namely, a first hole position (500-1) of the first sheet metal, a second hole position (500-2) of the first sheet metal, a third hole position (500-3) of the first sheet metal, a fourth hole position (500-4) of the first sheet metal, and a fifth hole position (500-5) of the first sheet metal; and two positioning protrusions (500-6) are provided on the outer surface of the first reinforcing rib (500-7); The outer surface of the second sheet metal (600) is fixedly mounted with a square groove (600-6), a fourth reinforcing rib (600-8), a fifth reinforcing rib (600-9) and a sixth reinforcing rib (600-10); the outer surface of the second sheet metal (600) is provided with five holes, namely, a first hole position (600-1) of the second sheet metal, a second hole position (600-2) of the second sheet metal, a third hole position (600-3) of the second sheet metal, a fourth hole position (600-4) of the second sheet metal and a fifth hole position (600-5) of the second sheet metal; and the outer surface of the sixth reinforcing rib (600-10) is provided with a protrusion (600-7); The outer surface of the third sheet metal (700) is provided with a first top surface (700-7), a second top surface (700-8), a third top surface (700-9) and a fourth top surface (700-10); the outer surface of the third sheet metal (700) is provided with six hole positions, namely, a first hole position (700-1) of the third sheet metal, a second hole position (700-2) of the third sheet metal, a third hole position (700-3) of the third sheet metal, a fourth hole position (700-4) of the third sheet metal, a fifth hole position (700-5) of the third sheet metal and a sixth hole position (700-6) of the third sheet metal; Small bushings (1900) are respectively installed in the second hole position (500-2) of the first sheet metal, the third hole position (500-3) of the first sheet metal, the second hole position (600-2) of the second sheet metal, the third hole position (600-3) of the second sheet metal, and the second hole position (700-2) of the third sheet metal; Large bushings (1800) are respectively installed at the first hole position (500-1) of the first sheet metal, the first hole position (600-1) of the second sheet metal, and the first hole position (700-1) of the third sheet metal.

3. The angle adjustment mechanism for a small table in a passenger or commercial vehicle according to claim 1, characterized in that: The outer surfaces of the spindle left part (300) and the spindle right part (400) are both provided with threaded holes, and the two threaded holes are divided into a left part threaded hole (300-2) and a right part threaded hole (400-2). One end of the spindle left part (300) is provided with a left part flat position groove (300-1), and one end of the spindle right part (400) is provided with an insertion head (400-1), and the insertion head (400-1) is adapted to the left part flat position groove (300-1).

4. The angle adjustment mechanism for a small table in a passenger or commercial vehicle according to claim 1, characterized in that: The inner wall of the second shell (200) is provided with three positioning holes (200-3), and the three positioning holes (200-3) correspond to the three sheet metals respectively. The side opposite to the first shell (100) and the second shell (200) is provided with a semicircular notch, and the two semicircular notches are respectively a first semicircular notch (200-1) and a second semicircular notch (100-1). The two semicircular notches are matched to form a circular notch, and the circular notch is matched with the main shaft. The outer surfaces of the first shell (100) and the second shell (200) are provided with a plurality of corresponding first shell mounting holes (100-2) and second shell mounting holes (200-2).

5. The angle adjustment mechanism for a small table in a passenger or commercial vehicle according to claim 2, characterized in that: The second gear (900) is stepped and comprises coarse teeth (900-1), fine teeth (900-2) and two second gear mounting inner grooves (900-3); The first gear (800) includes first gear teeth (800-1) and a first gear mounting hole (800-2); The outer surface of the third gear (1000) is provided with a third gear flat portion (1000-3), third gear teeth (1000-1), a threaded screw (1000-2) and two third gear end inner grooves (1000-4); Circlips (2000) are installed in the two third gear end inner grooves (1000-4) and the two second gear mounting inner grooves (900-3); The transmission ratio between the first gear (800) and the fine teeth (900-2) is one to two, and the transmission ratio between the coarse teeth (900-1) and the third gear (1000) is two to one.

6. The angle adjustment mechanism for a small table in a passenger or commercial vehicle according to claim 5, characterized in that: The ratchet (1100) comprises a ratchet mounting hole (1100-2), ratchet teeth (1100-1), a ratchet stop (1100-3) and a ratchet head boss (1100-4); the ratchet mounting hole (1100-2) is mounted on the outer surface of the third gear flat portion (1000-3).

7. The angle adjustment mechanism for a small table in a passenger or commercial vehicle according to claim 6, characterized in that: The pawl (1300) comprises a pawl tooth position (1300-1), a first pawl surface (1300-2), a pawl boss (1300-3), a pawl stopper (1300-4), a second pawl surface (1300-5) and a third pawl surface (1300-6); A retaining spring (2000) is installed on the outer surface of the ratchet boss (1300-3), and the ratchet boss (1300-3) passes through the fourth hole (600-4) of the second sheet metal and the third hole (700-3) of the third sheet metal in sequence, so as to rotate within the holes.

8. The angle adjustment mechanism for a small table in a passenger or commercial vehicle according to claim 7, characterized in that: The limiting hook (1200) comprises a limiting hook hook (1200-1), a limiting hook threaded hole (1200-2), a limiting hook back surface (1200-3) and a limiting hook hook surface (1200-4); the limiting hook threaded hole (1200-2) is mounted on and matched with the threaded screw rod (1000-2), so that the limiting hook (1200) can rotate axially and move translationally on the third gear (1000).

9. The angle adjustment mechanism for a small table in a passenger or commercial vehicle according to claim 2, characterized in that: The locking spring (1400) comprises a locking spring top surface (1400-1) and an unlocking spring (1400-2), wherein the unlocking spring (1400-2) is mounted on the outer surface of the square groove (600-6) of the second sheet metal (600); The spring (1700) comprises a spring straight hook (1700-1) and a spring bent hook (1700-2), and the spring straight hook (1700-1) is connected to a limiting hook surface (1200-4).

10. The angle adjustment mechanism for a small table in a passenger or commercial vehicle according to claim 2, characterized in that: A first rivet (1500) and a second rivet (1600) are provided between the first sheet metal (500) and the third sheet metal (700); The first rivet (1500) is provided with a first rivet left inner groove (1500-1) and a first rivet right inner groove (1500-2) at both ends, wherein the first rivet left inner groove (1500-1) is riveted into the fourth hole position (500-4) of the first sheet metal, and the first rivet right inner groove (1500-2) is riveted into the fourth hole position (700-4) of the third sheet metal. The second rivet (1600) is provided with a second rivet left inner groove (1600-1) and a second rivet right inner groove (1600-2) at both ends, the second rivet left inner groove (1600-1) is riveted into the fifth hole position (500-5) of the first sheet metal, and the second rivet right inner groove (1600-2) is riveted into the fifth hole position (600-5) of the second sheet metal.

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