A self-locking gravity caster frame structure
By designing a self-locking gravity caster frame structure including support plate, casters and control plates, the casters are automatically locked and manually unlocked by using components such as movable cavity, control cavity, semicircle block, rocker, push block and insertion block, the casters are automatically locked and manually unlocked, solving the problem of insufficient self-locking performance in the prior art, improving self-locking performance and simplifying operation.
Patent Information
- Application Number
- CN202111630642.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-12-28
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2041-12-28
AI Technical Summary
The existing self-locking casters require manual control of the dial to be turned on or unlocked, resulting in the self-locking performance not being perfect.
A self-locking gravity caster wheel frame structure is designed, including support plate, caster and control plate. Through components such as movable cavity, control cavity, semicircle block, rocker, push block and insert block, the caster will be automatically locked and manually unlocked.
The automatic locking function of casters is realized, which reduces the need for manual operation, improves the self-locking performance, and the protection block can be replaced, and the insertion block can be inserted into the jack smoothly, ensuring the smooth progress of automatic stop work.
Smart Images
Figure CN114379282B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of casters, in particular to a self-locking gravity caster frame structure. Background Art
[0002] Casters are a general term, including movable casters and fixed casters. Movable casters are also called universal wheels, and their structure allows 360-degree rotation; fixed casters are also called fixed casters, which have no rotating structure and cannot turn. Usually, the two types of casters are generally used in combination. For example, the structure of a trolley is two fixed wheels in the front and two universal wheels in the back near the push armrest. The caster frame is a bracket for mounting casters for sliding the trolley. The caster is placed on the caster frame. Under the condition of stable connection between the caster and the trolley, the caster can roll smoothly to drive the trolley to move. The general self-locking caster makes the caster have a stopping property. The structure of the caster frame must match the structure of the caster so that the stopping work can proceed smoothly.
[0003] Chinese patent authorization announcement number: CN 206217504U, authorization announcement date June 6, 2017, discloses a self-locking caster, including a semicircular wheel seat, wheel bodies on both sides of the wheel seat and a shifting block installed on the wheel seat, the wheel bodies are connected by an axle core passing through the wheel seat, and a clamping position is provided on the circumference of the inner wall of the wheel body; a rectangular hole groove is opened on the side wall of the wheel seat, a mounting seat corresponding to the hole groove is provided on the inner side of the wheel seat, a mounting hole is provided on the mounting seat, a through hole for the axle core to pass through is provided at the center of the wheel seat, a long strip-shaped clamping block facing the mounting seat is provided on the outer wall of the through hole, and the upper side wall of the clamping block is an inner arc; the shifting block passes through the hole groove and is fixed to the mounting seat by a fixing rod on the mounting hole, and a shifting rod matching the clamping position is provided at the tail end of the shifting block. The shortcoming of this invention is that the caster needs to manually press the shift block to lift the gear lever, and to release the locked state, the shift block still needs to be manually lifted to allow the caster to resume rotation. The "self-locking" performance cannot be fully explained.
[0004] In summary, a structure that can automatically lock the caster and unlock it manually can be provided on the caster frame. Summary of the invention
[0005] The invention aims to overcome the deficiency in the prior art that casters need manual control to be opened and stopped, and provides a self-locking gravity caster frame structure which can automatically lock the casters and requires manual operation to unlock.
[0006] In order to achieve the above object, the present invention adopts the following technical solutions:
[0007] A self-locking gravity caster wheel frame structure comprises a support plate, a caster and a control plate, wherein the support plate comprises two, the two support plates are respectively arranged at the left and right ends of the caster, the caster is rotatably connected to the support plate, the left and right ends of the control plate are respectively connected to the two support plates, an active cavity is arranged in the support plate, a control cavity is arranged in the control plate, the left and right ends of the control cavity are respectively connected to the two active cavities, a semicircular block is installed in the active cavity, a seesaw is arranged on the semicircular block, the seesaw is movably connected to the semicircular block, a pressing block and Two push blocks, the pressing block is movably connected to the control board, the two push blocks are respectively placed at the left and right ends of the pressing block, one end of the pushing block is movably connected to the pressing block, and the other end of the pushing block contacts with one end of the seesaw, and protection blocks are installed on the left and right sides of the caster, one side of the protection block is provided with a slide groove, and a number of sockets are evenly distributed in the slide groove, an insert block and a spring 1 are provided on the seesaw, the insert block passes through the support plate and is movably connected to the slide groove, the insert block matches the socket, and the distance between the spring 1 and the semicircular block is smaller than the distance between the spring 1 and the insert block.
[0008] A caster frame structure can be formed by two support plates at the left and right ends of the caster and a control plate connected to the two support plates at the left and right ends respectively. Protective blocks are installed on the left and right sides of the caster and the caster is rotatably connected to the support plate. The caster rotates smoothly under the protection effect of the protective block and the support effect of the support plate. When the movable press block on the control plate is released, the two push blocks in the control cavity of the control plate move toward the middle direction of the control cavity under the elastic effect of the spring 1 at the end of the seesaw on the semicircular block in the movable cavity of the support plate, so that the plug block on the other end of the seesaw is affected to be inserted into the socket on the protection block to start the automatic stop work of the caster, so that the purpose of automatically locking the caster and unlocking it manually is achieved, and the sockets are evenly distributed in the slide groove. When it is not inserted into the socket for the first time, when the caster drives the protection block to roll, the plug block moves in the slide groove until it is inserted into the socket, ensuring the smooth progress of the automatic stop work of the caster.
[0009] Preferably, the protection block is provided with a rolling bearing, the rolling bearing is provided with a rolling shaft, the rolling shaft passes through the inner ring of the rolling bearing and is connected to the support plate, the outer ring of the rolling bearing is connected to the protection block, the slide groove is placed on the protection block in a circular ring shape, and the rolling bearing is placed at the center of the circular ring slide groove. In this design, the rolling bearing connected to the protection block through the outer ring can well connect the inner ring of the rolling bearing with the rolling shaft, and the two ends of the rolling shaft are respectively connected to the two support plates, so that the protection block can rotate smoothly under the support effect of the rolling bearing, the slide groove is placed on the protection block in a circular ring shape and the rolling bearing is placed at the center of the circular ring slide groove, so that when the protection block rotates, the slide groove can rotate with the protection block, so that the plug in the slide groove can be inserted into the plug hole on the slide groove when the slide groove rotates.
[0010] Preferably, a screw hole is provided on the other side of the protection block, and a thread is installed on the caster, and the thread matches the screw hole, and the protection block is threadedly connected to the caster through the cooperation of the screw hole and the thread. In this design, the thread installed on the caster can be threadedly connected with the screw hole on the protection block that matches the thread, so that the protection block can be connected to the caster, which not only protects the caster but also facilitates disassembly, and the protection block can be replaced if it is damaged.
[0011] Preferably, a hard block is installed at one end of the plug block, a rolling groove is provided on the hard block, a roller is provided in the rolling groove, the diameter of the roller is greater than the groove depth of the rolling groove, a roller rod is provided on the roller, the roller is rotatably connected to the hard block through the roller rod, the plug block is movably connected to the slide groove through the roller, and the other end of the plug block is in contact with the seesaw. This design allows the roller in the rolling groove on the hard block to roll smoothly on the slide groove through the hard block installed at the end of the plug block, the diameter of the roller here is greater than the groove depth of the rolling groove so that the roller can smoothly contact the slide groove, and the roller is rotatably connected to the hard block through the roller rod, and rolls smoothly under the support effect of the hard block.
[0012] Preferably, the seesaw is provided with an insert block slot, the other end of the insert block is placed in the insert block slot, and the diameter of the end of the insert block in the insert block slot is larger than the diameter of the insert block outside the insert block slot. This design allows the end of the insert block to be smoothly inserted through the insert block slot on the seesaw, where the diameter of the end of the insert block in the insert block slot is larger than the diameter of the insert block outside the insert block slot, and the end of the insert block in the insert block slot can be smoothly moved without being separated from the insert block slot, thereby preventing the insert block from being separated from the control of the seesaw.
[0013] Preferably, the other end of the push block is provided with a semicircular groove, in which a ball 1 is provided, the ball 1 is connected to the push block in a rolling manner, and the pressing block is connected to the ball 1 in a rolling manner. In this design, the pressing block can control the ball 1 to roll in both ends, and the ball 1 is placed on the semicircular groove at the end of the push block, so that the ball 1 can roll smoothly when it is affected by the pressing block. Since the ball 1 is connected to the push block, the push block moves in both ends under the influence of the ball 1, so that the two push blocks can move in opposite directions to generate a gap.
[0014] Preferably, a rolling rod is provided on the ball roller 1, and the two ends of the rolling rod are respectively connected to the upper end and the lower end of the semicircular groove, and the ball roller 1 is rollingly connected to the rolling rod. In this design, the rolling rod on the ball roller 1 can be connected to the upper end and the lower end of the semicircular groove, and the ball roller 1 rolls under the support effect of the semicircular groove, thereby preventing the ball roller 1 from escaping from the semicircular groove.
[0015] Preferably, the control board is provided with a moving hole, the control cavity is connected to the moving hole, the moving hole matches the pressing block, and the position of the moving hole corresponds to the position of the pressing block. This design allows the pressing block matching the moving hole to pass through the moving hole smoothly through the moving hole on the control board, which facilitates the smooth movement of the pressing block.
[0016] Preferably, a moving groove is provided on the rear wall of the control panel, the vertical cross-section of the pressing block is a triangle, the two ends of the pressing block are placed in the moving groove, the other end of the pressing block faces the direction of ball one, the width of the moving hole is greater than the width of the upper end of the pressing block, a push rod is installed on the upper end of the pressing block, a compression spring is provided at the lower end of the pressing block, and the pressing block is connected to the control panel through the compression spring. In this way, the pressing block with two ends placed in the moving groove can be moved up and down through the moving groove on the rear wall of the control panel, the vertical cross-section of the pressing block is a triangle and the other end of the pressing block faces the direction of ball one, when the pressing block is not controlled, it moves downward under the elastic effect of the compression spring connected to the control panel at the lower end of the pressing block, and can touch ball one to make ball one deviate from its position, leaving a gap for the pressing block to enter, and the pushing rod on the upper end of the pressing block can be manually controlled to move the pressing block upward, and ball one can be controlled to move toward each other when it is not under the touch limit effect of the pressing block, and will not be interfered by the limit.
[0017] Preferably, a spring 2 is provided on the front wall of the control panel, one end of the spring 2 is connected to the control panel, and a ball 2 is installed on the other end of the spring 2. Two balls 1 are placed at the left and right ends of the ball 2. The ball 2 contacts the pressing block, and the push block is movably connected to the pressing block through the cooperation of the ball 1 and the ball 2. In this design, the spring 2 on the front wall of the control panel allows the ball 2 to move toward the front wall of the control panel due to the elastic effect of the spring 2 when the pressing block moves downward. The two balls 1 are placed at the left and right ends of the ball 2. When the ball 2 moves, it can touch the ball 1, allowing the ball 1 to move and leave a gap, so that the ball 2 can stagnate in the gap, so that the two balls 1 cannot move toward each other and return to the original state.
[0018] The beneficial effects of the present invention are: the purpose of automatically locking the caster and requiring manual operation to unlock it can be achieved; it is convenient for replacing the protection block; and it has the effect of allowing the plug block to be smoothly inserted into the socket. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a distribution schematic diagram of the present invention;
[0020] Figure 2 It is a structural schematic diagram of the present invention;
[0021] Figure 3 It is a schematic diagram of the structure of the protection block of the present invention;
[0022] Figure 4 is a connection diagram of the protection block of the present invention;
[0023] Figure 5 is a schematic structural diagram of the plug block of the present invention;
[0024] Figure 6 It is a structural schematic diagram of the block slot of the present invention;
[0025] Figure 7 It is a working schematic diagram of the push block of the present invention;
[0026] Figure 8 It is another working schematic diagram of the push block of the present invention;
[0027] Fig. 9 is a schematic diagram of the structure in the control cavity of the present invention;
[0028] Fig.10 yes Fig. 9 Schematic diagram of the structure of the cross section at AA.
[0029] In the figure: 1, support plate, 2, caster, 3, control board, 4, rolling shaft, 5, protection block, 6, plug block, 7, semicircular block, 8, seesaw, 9, spring one, 10, push block, 11, rolling bearing, 12, slide groove, 13, socket, 14, block, 15, rolling groove, 16, roller, 17, roller rod, 18, control chamber, 19, semicircular groove, 20, ball one, 21, rolling rod, 22, ball two, 23, spring two, 24, pressing block, 25, moving groove, 26, moving hole, 27, movable chamber, 28, screw hole, 29, thread, 30, plug block groove, 31, compression spring, 32, push rod. DETAILED DESCRIPTION
[0030] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.
[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8In the embodiment shown, a self-locking gravity caster wheel frame structure includes a support plate 1, a caster 2 and a control plate 3. The support plate 1 includes two, and the two support plates 1 are respectively placed at the left and right ends of the caster 2. The caster 2 is rotatably connected to the support plate 1. The left and right ends of the control plate 3 are respectively connected to the two support plates 1. An active cavity 27 is provided in the support plate 1, and a control cavity 18 is provided in the control plate 3. The left and right ends of the control cavity 18 are respectively connected to the two active cavities 27. A semicircular block 7 is installed in the active cavity 27, and a seesaw 8 is provided on the semicircular block 7. The seesaw 8 is movably connected to the semicircular block 7. A pressing block 24 and Two push blocks 10 and a pressing block 24 are movably connected to the control board 3. The two push blocks 10 are respectively placed at the left and right ends of the pressing block 24. One end of the push block 10 is movably connected to the pressing block 24. The other end of the push block 10 contacts one end of the rocker 8. Protective blocks 5 are installed on the left and right sides of the caster 2. A slide groove 12 is provided on one side of the protective block 5. A plurality of sockets 13 are evenly distributed in the slide groove 12. An insert block 6 and a spring 9 are provided on the rocker 8. The insert block 6 passes through the support plate 1 and is movably connected to the slide groove 12. The insert block 6 matches the socket 13. The distance between the spring 9 and the semicircular block 7 is smaller than the distance between the spring 9 and the insert block 6.
[0032] like Figure 3 and Figure 4 As shown, the protection block 5 is provided with a rolling bearing 11, the rolling bearing 11 is provided with a rolling shaft 4, the rolling shaft 4 passes through the inner ring of the rolling bearing 11 and is connected to the support plate 1, the outer ring of the rolling bearing 11 is connected to the protection block 5, the slide 12 is placed on the protection block 5 in a circular shape, and the rolling bearing 11 is placed at the center of the circular slide 12. The other side of the protection block 5 is provided with a screw hole 28, the caster 2 is installed with a thread 29, the thread 29 matches the screw hole 28, and the protection block 5 is threadedly connected to the caster 2 through the matching of the screw hole 28 and the thread 29.
[0033] like Figure 3 , Figure 5 and Figure 6 As shown, a hard block 14 is installed at one end of the plug block 6, a rolling groove 15 is provided on the hard block 14, a roller 16 is provided in the rolling groove 15, the diameter of the roller 16 is greater than the groove depth of the rolling groove 15, a roller rod 17 is provided on the roller 16, the roller 16 is rotatably connected to the hard block 14 through the roller rod 17, the plug block 6 is movably connected to the slide groove 12 through the roller 16, and the other end of the plug block 6 is in contact with the seesaw 8. An insert block groove 30 is provided on the seesaw 8, and the other end of the plug block 6 is placed in the insert block groove 30, and the diameter of the end of the plug block 6 in the insert block groove 30 is greater than the diameter of the plug block 6 outside the insert block groove 30.
[0034] like Figure 7 , Figure 8 , Fig. 9 and Fig.10As shown, the other end of the push block 10 is provided with a semicircular groove 19, and a ball 20 is provided in the semicircular groove 19. The ball 20 is connected to the push block 10 in a rolling manner, and the pressing block 24 is connected to the ball 20 in a rolling manner. A rolling rod 21 is provided on the ball 20, and the two ends of the rolling rod 21 are respectively connected to the upper end and the lower end of the semicircular groove 19, and the ball 20 is connected to the rolling rod 21 in a rolling manner. A moving hole 26 is provided on the control panel 3, and the control cavity 18 is connected to the moving hole 26. The moving hole 26 matches the pressing block 24, and the position of the moving hole 26 corresponds to the position of the pressing block 24 in an upper and lower manner. A moving groove 25 is provided on the rear wall of the control panel 3. The vertical cross-section of the pressing block 24 is triangular. Both ends of the pressing block 24 are placed in the moving groove 25. The other end of the pressing block 24 faces the direction of the ball 1 20. The width of the moving hole 26 is greater than the width of the upper end of the pressing block 24. A push rod 32 is installed on the upper end of the pressing block 24. A compression spring 31 is provided at the lower end of the pressing block 24. The pressing block 24 is connected to the control panel 3 through the compression spring 31. A spring 23 is provided on the front wall of the control panel 3. One end of the spring 23 is connected to the control panel 3. The other end of the spring 23 is installed with a ball 22. Two balls 1 20 are placed at the left and right ends of the ball 22. The ball 22 contacts the pressing block 24. The pushing block 10 is movably connected to the pressing block 24 through the cooperation of the ball 1 20 and the ball 2 22.
[0035] First, protective blocks 5 are installed on both sides of the caster 2. The protective blocks 5 are threadedly connected to the threads 29 on the caster 2 through screw holes 28. When the protective blocks 5 are damaged, they can be replaced by removing the threaded connection. Such a structural design is conducive to the replacement of the protective blocks 5.
[0036] When the caster is not controlled, the pressing block 24 in the control chamber 18 moves downward under the elastic effect of the compression spring 31 connected at the lower end. Here, the vertical cross-section of the pressing block 24 is triangular. The two ends of the pressing block 24 are placed in the moving groove 25 on the rear wall of the control board 3, and the other end faces the direction of the ball 1 20. The spring 23 on the front wall of the control board 3 is connected to the ball 22. The ball 22 is in contact with the pressing block 24. The downward movement of the pressing block 24 will push the ball 22 to move toward the front wall of the control board 3. The two push blocks 10 in the control chamber 18 are respectively placed at the left and right ends of the pressing block 24. One end of the push block 10 is provided with a semicircular groove 19. The ball The two ends of the rolling rod 21 on the one 20 are connected to the upper and lower ends of the semicircular groove 19 respectively. When the ball 22 moves, it touches the ball 20, so that the two balls 20 push the two push blocks 10 to move in the two end directions, and the gap flows out to allow the ball 22 to be placed in the gap. The other end of the push block 10 passes through the support plate 1 and touches one end of the seesaw 8 in the active cavity 27 on the support plate 1. The seesaw 8 here is movably connected with the semicircular block 7 installed in the active cavity 27. If one end of the seesaw 8 is pushed, the other end will move, and the plug block 6 on the seesaw 8 will be pushed to move toward the protective block 5 until the end of the plug block 6 is placed on the slide groove 12 on the protective block 5.
[0037] A hard block 14 is installed at one end of the plug block 6, and the rolling groove 15 of the hard block 14 is rollingly connected with a roller 16 through a roller rod 17. The diameter of the roller 16 is greater than the groove depth of the rolling groove 15, and the other end of the plug block 6 is placed in the plug block groove 30 of the seesaw 8. The end diameter of the plug block 6 in the plug block groove 30 is greater than the diameter of the plug block 6 outside the plug block groove 30. When the plug block 6 is pushed by the seesaw 8, the end of the plug block 6 in the plug block groove 30 can move freely but will not deviate from the plug block groove 30, and a number of sockets 13 are evenly distributed on the circular ring-shaped slide groove 12 placed on the protection block 5. When the plug block 6 touches the protection block 5, the roller 16 on the plug block 6 can roll smoothly in the slide groove 12 until it rolls into the socket 13 and is inserted, so that the plug block 6 can be smoothly inserted into the socket 13. The protection block 5 stops rotating due to the limiting effect of the plug block 6, so that the caster 2 does not rotate.
[0038] When the push rod 32 installed on the upper end of the pressing block 24 is manually stretched, the pressing block 24 is forced to move upward, and the ball 22 will be separated from the gap between the two ball 1s 20 under the elastic effect of the spring 23, and the elastic effect of the spring 19 at the upper end of the seesaw 8 will make the end of the seesaw 8 here move toward the connection between the spring 19 and the support plate 1, and the other end of the seesaw 8 is provided with an insertion block groove 30, and the end diameter of the insertion block 6 in the insertion block groove 30 is larger than the diameter of the insertion block 6 outside the insertion block groove 30, and the insertion block 6 can be pulled by the insertion block groove 30 to move, so that the insertion block 6 inserted into the socket 13 is separated, and at the same time, the two ball 1s 20 move toward each other in the control chamber 18, so that the caster 2 can rotate, thereby achieving the purpose of automatically locking the caster 2 and unlocking it manually.
Claims
1. A self-locking gravity caster frame structure, characterized in that: The invention comprises a support plate (1), a caster (2) and a control plate (3), wherein the support plate (1) comprises two support plates (1), the two support plates (1) are respectively arranged at the left and right ends of the caster (2), the caster (2) is rotatably connected to the support plate (1), the left and right ends of the control plate (3) are respectively connected to the two support plates (1), the support plate (1) is provided with an active cavity (27), the control plate (3) is provided with a control cavity (18), the left and right ends of the control cavity (18) are respectively connected to the two active cavities (27), a semicircular block (7) is installed in the active cavity (27), and the semicircular block (7) is installed in the semicircular block (18). A seesaw (8) is provided on the circular block (7), the seesaw (8) is movably connected to the semicircular block (7), a pressing block (24) and two push blocks (10) are provided in the control chamber (18), the pressing block (24) is movably connected to the control panel (3), the two push blocks (10) are respectively arranged at the left and right ends of the pressing block (24), one end of the push block (10) is movably connected to the pressing block (24), and the other end of the push block (10) is in contact with one end of the seesaw (8), and protection blocks (5) are installed on both left and right sides of the caster (2), and a slide groove is provided on one side of the protection block (5). (12), a plurality of jacks (13) are evenly distributed in the slide groove (12), an insert block (6) and a spring (9) are provided on the seesaw (8), the insert block (6) passes through the support plate (1) and is movably connected to the slide groove (12), the insert block (6) matches the jack (13), the distance between the spring (9) and the semicircular block (7) is smaller than the distance between the spring (9) and the insert block (6), a hard block (14) is installed at one end of the insert block (6), a rolling groove (15) is provided on the hard block (14), a roller (16) is provided in the rolling groove (15), and the roller The diameter of the plug-in block (16) is greater than the groove depth of the rolling groove (15); a roller rod (17) is provided on the roller (16); the roller (16) is rotatably connected to the hard block (14) through the roller rod (17); the plug-in block (6) is movably connected to the slide groove (12) through the roller (16); the other end of the plug-in block (6) is in contact with the seesaw (8); the seesaw (8) is provided with a plug-in block groove (30); the other end of the plug-in block (6) is placed in the plug-in block groove (30); the diameter of the end of the plug-in block (6) in the plug-in block groove (30) is greater than the diameter of the plug-in block (6) outside the plug-in block groove (30).
2. A self-locking gravity caster frame structure according to claim 1, characterized in that: The protection block (5) is provided with a rolling bearing (11), the rolling bearing (11) is provided with a rolling shaft (4), the rolling shaft (4) passes through the inner ring of the rolling bearing (11) and is connected to the support plate (1), the outer ring of the rolling bearing (11) is connected to the protection block (5), the slide groove (12) is arranged on the protection block (5) in the shape of a circular ring, and the rolling bearing (11) is arranged at the center of the circular ring slide groove (12).
3. A self-locking gravity caster frame structure according to claim 1, characterized in that: A screw hole (28) is provided on the other side of the protection block (5), a thread (29) is installed on the caster (2), the thread (29) matches the screw hole (28), and the protection block (5) is threadedly connected to the caster (2) through the matching of the screw hole (28) and the thread (29).
4. A self-locking gravity caster frame structure according to claim 1, characterized in that: The other end of the push block (10) is provided with a semicircular groove (19), a ball (20) is provided in the semicircular groove (19), the ball (20) is rollingly connected to the push block (10), and the pressing block (24) is rollingly connected to the ball (20).
5. A self-locking gravity caster frame structure according to claim 4, characterized in that: The first ball (20) is provided with a rolling rod (21), and the two ends of the rolling rod (21) are respectively connected to the upper end and the lower end of the semicircular groove (19), and the first ball (20) is rollingly connected to the rolling rod (21).
6. A self-locking gravity caster frame structure according to claim 5, characterized in that: The control plate (3) is provided with a movable hole (26), the control cavity (18) is in communication with the movable hole (26), the movable hole (26) matches the pressing block (24), and the position of the movable hole (26) corresponds to the position of the pressing block (24) in the upper and lower directions.
7. A self-locking gravity caster frame structure according to claim 6, characterized in that: A movable groove (25) is provided on the rear wall of the control panel (3); the vertical cross-section of the pressing block (24) is triangular; two ends of the pressing block (24) are placed in the movable groove (25); the other end of the pressing block (24) faces the direction of the ball bearing (20); the width of the movable hole (26) is greater than the width of the upper end of the pressing block (24); a push rod (32) is installed on the upper end of the pressing block (24); a compression spring (31) is provided at the lower end of the pressing block (24); and the pressing block (24) is connected to the control panel (3) via the compression spring (31).
8. A self-locking gravity caster frame structure according to claim 7, characterized in that: A second spring (23) is provided on the front wall of the control panel (3), one end of the second spring (23) is connected to the control panel (3), and a second ball (22) is installed on the other end of the second spring (23). Two first balls (20) are arranged at the left and right ends of the second ball (22), and the second ball (22) is in contact with the pressing block (24). The push block (10) is movably connected to the pressing block (24) through the cooperation of the first ball (20) and the second ball (22).
Citation Information
Patent Citations
Auto -lock truckle
CN206217504U
Seesaw truckle that brakes
CN208530169U
Sump protection cover plate
CN212534171U