Speed limiting mechanism and propelling mechanism comprising same
By introducing a speed limiting mechanism into the propulsion mechanism, and utilizing the meshing structure of the rack and pinion and the speed limiting gear, as well as damping oil, the problem of excessively fast push plate movement speed is solved, achieving deceleration and uniform speed movement of the push plate, thereby improving the stability and application effect of the propulsion mechanism.
Patent Information
- Application Number
- CN202422938878.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-11-29
AI Technical Summary
The existing propulsion mechanism moves too fast, causing goods to tip over and be damaged, requiring additional manual maintenance.
A speed limiting mechanism is adopted, which uses the meshing structure of rack and pinion and speed limiting gear to limit the rotation speed of the gear with damping oil, combined with the auxiliary speed limiting of one-way bearing, to achieve deceleration and uniform movement of the push plate.
It effectively slows down the movement speed of the pusher, prevents goods from tipping over and being damaged, reduces maintenance costs, and improves the stability and application value of the propulsion mechanism.
Smart Images
Figure CN223759549U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of propulsion mechanism technology, specifically to a speed limiting mechanism and a propulsion mechanism including the speed limiting mechanism. Background Technology
[0002] The push mechanism is an automated merchandising device used on retail shelves in shopping malls, supermarkets, convenience stores, department stores, etc. It helps organize the goods on the shelves. After a customer takes a product from the shelf, the push mechanism can push the product from the back of the shelf to the front, always keeping the front of the shelf displaying goods. It can assist in merchandising, especially during restocking and sorting. Staff do not need to manually arrange and place goods, so it has high application value.
[0003] However, existing propulsion mechanisms mainly rely on springs to reset the push plate. In actual use, the spring reset causes the push plate to move too fast, which can easily cause the goods to tip over and be damaged. If the goods cannot be pushed stably, additional manual maintenance is required.
[0004] Therefore, a speed limiting mechanism is urgently needed to solve the problem of excessively fast movement speed of the propulsion mechanism. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model proposes a speed limiting mechanism and a propulsion mechanism including the speed limiting mechanism, which can decelerate the push plate or make the push plate move at a constant speed, thus solving the problem of excessively fast movement speed of the push plate in the propeller. This is beneficial for the promotion and application of the propulsion mechanism in shopping malls, supermarkets, convenience stores, or department stores.
[0006] The technical solution of this utility model is implemented as follows:
[0007] The first aspect of this utility model provides a speed limiting mechanism, including a rack and a speed limiting gear. The rack includes meshing tooth grooves arranged along the length direction of the rack. The speed limiting gear includes a rotating part and a gear part. The outer surface of the gear part is provided with locking teeth that mesh with the meshing tooth grooves. The rotating part extends from the inside to the outside and is provided with a rotating shaft for connecting a propulsion mechanism. The rotating part is located in the cavity of the gear part and the rotating shaft passes through the gear part. The cavity of the gear part is filled with damping oil to limit the rotational speed of the gear part relative to the rotating part.
[0008] In a first aspect of the utility model, as a preferred embodiment, the rotating part is provided with a one-way bearing to help limit the rotational speed of the rotating part.
[0009] In a first aspect of the utility model, as a preferred embodiment, the depth of the meshing groove is in the range of 50%-90% of the height of the locking tooth.
[0010] In a preferred embodiment of the first aspect of the utility model, both the meshing groove and the contact surface of the locking tooth are provided with a wear-resistant coating.
[0011] In a preferred embodiment of the first aspect of the utility model, the edge of the rotating part is provided with an abutting part for abutting the inner surface of the gear cavity and a clearance part for forming a damping oil filling space.
[0012] A second aspect of this utility model provides a propulsion mechanism, including a speed limiting mechanism as described in the first aspect, wherein the propulsion mechanism includes a propulsion component, a plug, and a slide:
[0013] The propulsion assembly includes a spring, a baffle disposed at the front end of the plug, and a push plate slidably connected in the slide. One end of the spring is wound inside the push plate, and the other end of the spring passes through the push plate and is fixedly connected to the plug. When the push plate moves to the rear end of the slide, the push plate is fixed on the slide by a snap-fit assembly.
[0014] The push plate is provided with a mounting part by bolt connection, and the mounting part is provided with a mounting hole for inserting the rotating shaft so that the speed limiting gear is mounted on the push plate;
[0015] The rack is disposed within the slide rail, and the helical teeth on the helical rod mesh with the meshing grooves on the rack;
[0016] The plug is installed at both ends of the slide.
[0017] In a second aspect of the utility model, as a preferred embodiment, the plug includes a plug body and a movable block. Movable grooves for movably mounting the movable block are respectively provided on both sides of the plug body. At least one protrusion is provided on the surface of the movable block. At least one engaging portion is provided on the inner wall of the movable groove to grade the length of the movable groove. The protrusion engages with the engaging portion to allow the movable block to adjust its extension and retraction length in multiple stages within the movable groove. An insertion portion for mounting a separator is provided at the end of the movable block away from the plug body, and a separator is inserted into the insertion portion.
[0018] In a second aspect of the utility model, as a preferred embodiment, the slide rail includes a rack area for mounting the rack, a propulsion area for slidably mounting the propulsion assembly, and a guide area for guiding the sliding article.
[0019] In a second aspect of the utility model, as a preferred embodiment, the buckle assembly includes a first buckle disposed at the rear end of the propulsion zone and a first snap-fit groove disposed at the bottom of the push plate. When the push plate moves to the rear end of the propulsion zone, the first buckle snaps into the first snap-fit groove to fix the push plate to the rear end of the propulsion zone.
[0020] In a second aspect of the utility model, as a preferred embodiment, the buckling assembly includes a second buckle disposed at the rear end of the propulsion zone and a third buckle disposed on the push plate. When the push plate moves to the rear end of the propulsion zone, the second buckle engages with the third buckle to fix the push plate to the rear end of the propulsion zone.
[0021] The second buckle includes an L-shaped first snap-fit end, and the third buckle includes a mounting buckle fixedly disposed on the push plate and a first snap-fit buckle snapped in the mounting buckle. The first snap-fit buckle includes an L-shaped second snap-fit end. When the push plate moves to the rear end of the push area, the first snap-fit end extends into the first snap-fit buckle and snaps into the second snap-fit end.
[0022] Compared with the prior art, the present invention has the following advantages:
[0023] This utility model proposes a speed limiting mechanism and a propulsion mechanism including the speed limiting mechanism. The speed limiting mechanism includes a rack and a speed limiting gear. The rack includes meshing tooth grooves arranged along the length direction of the rack. The speed limiting gear includes a rotating part and a gear part. The outer surface of the gear part is provided with locking teeth that mesh with the meshing tooth grooves. The rotating part extends from the inside to the outside and is provided with a rotating shaft for connecting the propulsion mechanism. The rotating part is located in the cavity of the gear part and the rotating shaft passes through the gear part. The cavity of the gear part is filled with damping oil to limit the rotational speed of the gear part relative to the rotating part. The speed limiting mechanism limits the rotational speed of the gear part relative to the rotating part of the speed limiting gear through the damping oil, thereby slowing down the movement speed of the speed limiting gear on the rack. When the speed limiting mechanism is installed on the propulsion mechanism, the movement of the push plate is limited by the action of the reduction gear, thereby achieving the effect of slowing down the push plate or making the push plate move at a uniform speed. This solves the problem of the excessively fast movement speed of the push plate in the propulsion device and is conducive to the promotion and application of the propulsion mechanism in shopping malls, supermarkets, convenience stores, or department stores. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of a speed limiting mechanism in Embodiment 1 of this utility model;
[0026] Figure 2 This is a schematic diagram of the internal structure of the speed limiting gear in a speed limiting mechanism according to Embodiment 1 of this utility model;
[0027] Figure 3 This is a schematic diagram of the internal structure of the rotating part of a speed limiting mechanism in Embodiment 1 of this utility model;
[0028] Figure 4 This is a schematic diagram of a propulsion mechanism including a speed limiting mechanism in Embodiment 2 of this utility model;
[0029] Figure 5 This is a schematic diagram of the slide structure in Embodiment 2 of this utility model;
[0030] Figure 6 In Embodiment 2 of this utility model Figure 4 Another perspective on the structural diagram of the snap-fit assembly;
[0031] Figure 7 This is a schematic diagram of the pusher plate inside the propulsion assembly in Embodiment 2 of this utility model;
[0032] Figure 8 This is a schematic diagram of the plug structure inside the propulsion mechanism in Embodiment 2 of this utility model;
[0033] Figure 9 for Figure 8 A structural diagram from another perspective;
[0034] Figure 10 for Figure 8 A schematic diagram of the structure of the active block;
[0035] Figure 11 This is a schematic diagram of a propulsion mechanism including a speed limiting mechanism in Embodiment 3 of this utility model;
[0036] Figure 12 for Figure 11 Enlarged view of point A in the middle;
[0037] Figure 13 This is a schematic diagram of the third buckle in Embodiment 3 of this utility model.
[0038] Attached image labels:
[0039] 1-Rack, 1A-Meshing tooth groove;
[0040] 2-Speed limiting gear, 2A-Clamping gear, 2B-Rotating shaft, 21-Rotating part, 211-Abutting part, 212-Relief part, 22-Gear part, 23-One-way bearing;
[0041] 3-Propulsion assembly, 31-Spring, 32-Baffle, 33-Push plate, 331-Mounting part, 332-Mounting hole, 333-Bolt;
[0042] 4-Plug, 41-Plug body, 411-Modular groove, 412-Interlocking part, 42-Modular block, 421-Protrusion, 422-Insertion part, 43-Separator;
[0043] 5-Slide, 5A-Rack and pinion area, 5B-Propulsion area, 5C-Guide area;
[0044] 6-Snap-on assembly, 61-First snap-on, 62-First snap-on slot, 63-Second snap-on, 64-Third snap-on, 641-Mounting buckle, 642-First snap-on buckle. Detailed Implementation
[0045] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0046] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," "third," and "fourth," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0048] Example 1
[0049] See Figures 1 to 13 Embodiment 1 of this utility model discloses a speed limiting mechanism, including a rack 1 and a speed limiting gear 2. The rack 1 includes a meshing tooth groove 1A arranged along the length direction of the rack 1. The speed limiting gear 2 includes a rotating part 21 and a gear part 22. The outer surface of the gear part 22 is provided with a locking tooth 2A that meshes with the meshing tooth groove 1A. The rotating part 21 extends from the inside to the outside and is provided with a rotating shaft 2B for connecting a propulsion mechanism. The rotating part 21 is located in the cavity of the gear part 22 and the rotating shaft 2B passes through the gear part 22. The cavity of the gear part 22 is filled with damping oil to limit the rotation speed of the gear part 22 relative to the rotating part 21.
[0050] It should be noted that existing propulsion mechanisms consist of a pusher mounted on a slide. The pusher typically includes a base plate, a spring, and a push plate. In actual use, the spring's elastic contraction pulls the push plate towards the front of the slide, thus pushing the goods on the base plate or slide. However, while the elastic contraction of the spring provides a force to move the push plate, its movement speed is uncontrollable. Often, the excessively fast movement speed can suddenly push the goods (or cargo) on the slide (or base plate), causing damage or knocking over the goods. This is especially true for fragile items in glass packaging, which are easily broken by the sudden push. Excessive pushing speed can also cause goods to tip over or fall out of the slide, resulting in increased manpower costs for product damage and maintenance. The excessively fast movement speed of the pusher's push plate hinders the promotion of propulsion mechanisms in shopping malls, supermarkets, convenience stores, or department stores. Therefore, limiting the movement speed of the push plate is a problem that urgently needs to be solved for propulsion mechanisms.
[0051] Specifically, the working principle of the speed limiting mechanism is to reduce the rotational speed of the gear part 22 relative to the rotating part 21 by the viscosity of the damping oil, thereby forming a gear structure with a speed limiting effect. The speed limiting mechanism is connected to the push plate 33 through the rotating shaft 23 extending from the rotating part 21. After being pulled by the contraction of the spring 31, the push plate 33 of the propulsion mechanism will move linearly along the length of the slide to the front end of the slide. The rack 1 is also set along the length of the slide. When the push plate 33 moves forward, the speed limiting gear 2, which is on the same horizontal line as the push plate 33, will also move forward. Since the speed limiting gear 2 and the rack 1 are meshed, the speed limiting gear 2 needs to move along the length of the slide. The lengthwise movement of rack 1 requires overcoming the viscous effect of the damping oil between rotating part 21 and gear part 22. This ensures that speed limiting gear 2 and push plate 33 move forward on the same horizontal line. During the movement, the push plate 33's advancing speed is limited in order to maintain the same moving speed as reduction gear 2 due to the need to overcome the viscous effect of the damping oil. This achieves either deceleration of push plate 33 or maintaining a uniform moving speed after deceleration, allowing push plate 33 to smoothly push the goods to the front of the slide. This reduces the problem of goods damage and the need for continuous maintenance caused by push plate 33 moving too fast or suddenly accelerating.
[0052] In a preferred embodiment of the first aspect of the utility model, the rotating part 21 is provided with a one-way bearing 23 to help limit the rotation speed of the rotating part 21. The one-way bearing 23 can act as a speed limiting mechanism to limit the speed of the push plate during the process of pushing the goods. When replenishing or sorting goods, pushing the push plate to the end of the slide will no longer limit the speed, which is convenient for staff to replenish and sort goods.
[0053] In a preferred embodiment of the first aspect of the utility model, the depth of the meshing groove 1A is 50%-90% of the height of the locking tooth 2A. Specifically, the meshing groove 1A and the locking tooth 2A cooperate with each other to prevent the locking tooth 2A from disengaging from the meshing groove 1A, thereby preventing the speed limiting mechanism from failing to work due to tooth disengagement and increasing the stability of the speed limiting mechanism.
[0054] In a preferred embodiment of the first aspect of the utility model, the contact surfaces of the meshing groove 1A and the locking tooth 2A are both provided with a wear-resistant coating. In actual use, in order to adjust the friction force on the contact surfaces of the meshing groove 1A and the locking tooth 2A, the service life of the speed limiting mechanism can be extended by adding a coating.
[0055] In a preferred embodiment of the first aspect of the utility model, the edge of the rotating part 21 is provided with an abutting part 211 for abutting against the inner surface of the cavity of the gear part 22 and a clearance part 212 for forming a damping oil filling space.
[0056] Example 2
[0057] See Figures 1-13 Embodiment 2 of this utility model proposes a propulsion mechanism, including a speed limiting mechanism as proposed in Embodiment 1. The propulsion mechanism includes a propulsion component 3, a plug head 4, and a slide rail 5.
[0058] The propulsion assembly 3 includes a spring 31, a baffle 32 disposed at the front end of the plug 4, and a push plate 33 slidably connected in the slide rail 5. One end of the spring 31 is wound around the push plate 33, and the other end of the spring passes through the push plate 33 and is fixedly connected to the plug 4. When the push plate 33 moves to the rear end of the slide rail 5, the push plate 33 is fixed on the slide rail 5 by a snap-fit assembly 6.
[0059] Specifically, the push plate 33 can be fixed on the slide rail 5 by the snap-fit assembly 6, which facilitates the addition and replenishment of goods on the shelf, making it quite convenient.
[0060] The push plate 33 is provided with a mounting part 331 by bolt connection. The mounting part 331 is provided with a mounting hole 332 for inserting the rotating shaft 2B so that the speed limiting gear 2 is installed on the push plate 33.
[0061] The rack 1 is disposed in the slide rail 5, and the helical teeth 21 on the helical rod 2 mesh with the meshing grooves 11 on the rack 1;
[0062] Specifically, the mounting part 331 provides a position for mounting the speed limiting gear 2. The rotating shaft 2B of the speed limiting gear 2 is inserted into the mounting hole 332 of the mounting part 331, allowing the speed limiting gear 2 to rotate on the push plate 33. The locking teeth 2A on the speed limiting gear 2 mesh with the meshing grooves 1A on the rack 1. When the push plate 33 moves, the speed limiting gear 2 is driven to rotate by the meshing state of the locking teeth 2A and the meshing grooves 1A. The damping oil provided between the rotating part 21 and the gear part 22 in the speed limiting gear 2 has viscosity, which will limit the rotational speed of the gear part 22 relative to the rotating part 21, thereby hindering the push plate 33 from continuing to move, thus achieving the purpose of limiting the speed of the push plate 33.
[0063] The plug 4 is installed at both ends of the slide 5.
[0064] In a second aspect of the utility model, as a preferred embodiment, the plug 4 includes a plug body 41 and a movable block 42. The plug body 41 has movable grooves 411 on both sides for movably mounting the movable block 42. The surface of the movable block 42 has at least one protrusion 421. The inner wall of the movable groove 411 has at least one engaging part 412 for classifying the length of the movable groove 411. The protrusion 421 engages with the engaging part 412 to allow the movable block 42 to adjust its extension length in multiple stages within the movable groove 411. The end of the movable block 42 away from the plug body 41 has a plug-in part 422 for mounting a separator 43, and the separator 43 is inserted into the plug-in part 422.
[0065] Specifically, the movable block 42 can extend and retract within the movable groove 411, adjusting the length of the movable block 42 extending beyond the groove 411, thereby changing the spacing between the separators 43 mounted on the movable block 42. The protrusions 421 on the movable block 42 can engage with different engaging parts 412 in the inner wall of the movable groove 411 for fixation, thereby achieving multiple levels of adjustable extension and retraction length of the movable block 42. The spacing between the engaging parts 412 can be fixed at the same value or different values, and the protrusions 421 are elastic, allowing them to engage with the engaging parts 412 to fix the movable block 42 during fixation. The length of the movable block 42 is adjustable. When the movable block 42 is pulled out or pushed in, the elastic protrusion 421 can disengage from the locking part 412 to readjust the length of the movable block 42 in the movable groove 411. The movable block 42 is pushed out or pushed back, and multiple positions are set by the locking part 412. Each time the block is pushed forward by one position, the distance is widened, and each time it is pushed back by one position, the distance is narrowed. At the same time, there is a clear click sound feedback for each position adjustment (the protrusion 421 elastically deforms and engages with the locking part 412), indicating to the user that the distance of the position adjustment has been reached, so as to realize the flexibility of adjusting the length of the movable block 42 in multiple levels.
[0066] In a second aspect of the utility model, as a preferred embodiment, the slide 5 includes a rack area 5A for mounting the rack 1, a propulsion area 5B for sliding the propulsion assembly 3, and a guide area 5C for guiding the sliding object.
[0067] In a second aspect of the utility model, as a preferred embodiment, the latching assembly 6 includes a first latch 61 disposed at the rear end of the push zone 5B and a first latching groove 62 disposed at the bottom of the push plate 33. When the push plate 33 moves to the rear end of the push zone 5B, the first latch 61 engages in the first latching groove 62 to fix the push plate 33 to the rear end of the push zone 5B.
[0068] In a second aspect of the utility model, as a preferred embodiment, the latching assembly 6 includes a second latch 63 disposed at the rear end of the push zone 5B and a third latch 64 disposed on the push plate 33. When the push plate 33 moves to the rear end of the push zone 5B, the second latch 63 engages with the third latch 64 to fix the push plate 33 to the rear end of the push zone 5B.
[0069] Example 3
[0070] like Figures 1-13 As shown, the difference between this embodiment 3 and embodiment 2 is that the buckle assembly 6 includes a second buckle 63 disposed at the rear end of the push area 5B and a third buckle 64 disposed on the push plate 33. When the push plate 33 moves to the rear end of the push area 5B, the second buckle 63 engages with the third buckle 64 to fix the push plate 33 to the rear end of the push area 5B.
[0071] The second buckle 63 includes an L-shaped first snap-fit end, and the third buckle 64 includes a mounting buckle 641 fixedly disposed on the push plate 33 and a first snap-fit buckle 642 snapped in the mounting buckle 641. The first snap-fit buckle 642 includes an L-shaped second snap-fit end. When the push plate 33 moves to the rear end of the push area 5B, the first snap-fit end extends into the first snap-fit buckle 642 and snaps into the second snap-fit end.
[0072] Specifically, in this embodiment, when it is necessary to fix the push plate 33 on the slide rail 5, the first locking end extends into the first locking buckle 642 to lock the second locking end; when it is necessary to remove the push plate 33 from the slide rail 5, the push plate 33 is pushed towards the rear end of the slide rail 5 so that the first locking end and the second locking end disengage.
[0073] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A speed limiting mechanism applied to a propulsion mechanism, characterized in that, The application relates to a speed limiting gear (2) and a rack (1), wherein the rack (1) comprises engaging tooth grooves (1A) arranged along the length direction of the rack (1), the speed limiting gear (2) comprises a rotating part (21) and a gear part (22), the gear part (22) is provided with clamping teeth (2A) on the outer surface for engaging with the engaging tooth grooves (1A), the rotating part (21) is provided with a rotating shaft (2B) for connecting a propelling mechanism from inside to outside, the rotating part (21) is arranged in the cavity of the gear part (22) and the rotating shaft (2B) penetrates through the gear part (22), and the cavity of the gear part (22) is filled with damping oil to limit the rotating speed of the gear part (22) relative to the rotating part (21).
2. The speed limiting mechanism of claim 1, wherein, The rotating part (21) is provided with a one-way bearing (23) for assisting in limiting the rotating speed of the rotating part (21).
3. The speed limiting mechanism of claim 1, wherein, The depth of the engaging tooth grooves (1A) ranges from 50% to 90% of the height of the clamping teeth (2A).
4. The speed limiting mechanism of claim 1, wherein, The contact surfaces of the engaging tooth grooves (1A) and the clamping teeth (2A) are provided with wear-resistant coatings.
5. The speed limiting mechanism of claim 1, wherein, The edges of the rotating part (21) are respectively provided with abutting parts (211) for abutting against the inner surfaces of the cavity of the gear part (22) and allowing parts (212) for forming damping oil filling spaces.
6. A propulsion mechanism comprising a speed limiting mechanism according to any one of claims 1-5, characterized in that The propelling mechanism comprises a propelling assembly (3), a plug head (4) and a slide (5). The propelling assembly (3) comprises a clockwork (31), a baffle (32) arranged at the front end of the plug head (4) and a push plate (33) slidably connected in the slide (5), one end of the clockwork (31) is arranged in the push plate (33), the other end of the clockwork penetrates through the push plate (33) and is fixedly connected with the plug head (4), when the push plate (33) moves to the rear end of the slide (5), the push plate (33) is fixed on the slide (5) through a buckle assembly (6); The push plate (33) is provided with a mounting part (331) through bolt connection, the mounting part (331) is provided with a mounting hole (332) for inserting the rotating shaft (2B), so that the speed limiting gear (2) is mounted on the push plate (33); The rack (1) is arranged in the slide (5), and the clamping teeth (2A) on the speed limiting gear (2) engage with the engaging tooth grooves (1A) on the rack (1); The plug head (4) is mounted at the front and rear ends of the slide (5).
7. A propulsion mechanism according to claim 6, wherein The plug head (4) comprises a plug head body (41) and a movable block (42), the movable block (42) is movably arranged on both sides of the plug head body (41), the movable block (42) is provided with at least one protrusion (421) on the surface, the inner wall of the movable slot (411) is provided with at least one clamping part (412) for grading the length of the movable slot (411), the protrusion (421) and the clamping part (412) are clamped with each other, so that the movable block (42) can adjust the telescopic length of the movable block (42) in the movable slot (411) in multiple stages, the end of the movable block (42) away from the plug head body (41) is provided with a plug-in part (422) for carrying a partition piece (43), and the partition piece (43) is inserted in the plug-in part (422).
8. A propulsion mechanism according to claim 6, wherein, The slide (5) comprises a rack area (5A) for mounting the rack (1), a pushing area (5B) for slidingly mounting the pushing assembly (3), and a guide area (5C) for guiding the sliding object.
9. A propulsion mechanism according to claim 8, wherein, The buckle assembly (6) comprises a first buckle (61) arranged at the rear end of the pushing area (5B) and a first clamping groove (62) arranged at the bottom of the push plate (33), when the push plate (33) moves to the rear end of the pushing area (5B), the first buckle (61) is clamped in the first clamping groove (62) to fix the push plate (33) at the rear end of the pushing area (5B).
10. A propulsion mechanism according to claim 8, wherein, The buckle assembly (6) comprises a second buckle (63) arranged at the rear end of the pushing area (5B) and a third buckle (64) arranged on the push plate (33), when the push plate (33) moves to the rear end of the pushing area (5B), the second buckle (63) is clamped in the third buckle (64) to fix the push plate (33) at the rear end of the pushing area (5B). The second buckle (63) comprises a first clamping end in L shape, the third buckle (64) comprises a mounting buckle (641) fixedly arranged on the push plate (33) and a first clamping buckle (642) clamped in the mounting buckle (641), the first clamping buckle (642) comprises a second clamping end in L shape, when the push plate (33) moves to the rear end of the pushing area (5B), the first clamping end extends into the first clamping buckle (642) to clamp the second clamping end.