Toothed partial engagement matching mechanism and logistics system

Abstract

The present disclosure relates to an engagement and matching mechanism and a logistics system. The engagement and matching mechanism includes a rack including a first side and a second side arranged opposite each other, a first guide tooth provided on the first side, a second guide tooth movably provided on the first side, the second guide tooth being farther from the second side than the first guide tooth, and a gear configured to partially engage with the rack from the first side and move toward the second side to fully engage with the rack, wherein at least one of the first guide tooth and the second guide tooth is configured to engage with the gear during movement of the gear from the first side toward the second side. In the present disclosure, the first guide tooth and the second guide tooth cooperate with each other to reduce various adverse factors for guiding the gear into the rack and promote successful guiding of the gear into the rack at any angle.

Description

[Technical field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This disclosure is based on and claims priority to Chinese Application No. 202010346293.4, filed on April 27, 2020, the disclosure of which is incorporated herein by reference in its entirety.

[0002] The present disclosure relates to the field of mechanical transmission, and in particular to Toothed part The present invention relates to an engagement and matching mechanism and a logistics system. [Background technology]

[0003] In a logistics system, a logistics vehicle needs to frequently switch from horizontal movement to vertical rising movement. The logistics vehicle generally rises along the rack by the engagement between the gear and the rack. In the process of guiding the gear into the rack, there is a phenomenon that the gear abuts against the side of the rack and cannot move axially, which leads to the failure of the axial guidance of the gear into the rack, causing a system failure and affecting the operation efficiency of the whole system. Summary of the Invention [Means for solving the problem]

[0004] In some embodiments of the present disclosure, Toothed part An engagement mechanism is provided, Toothed part The fitting mechanism is a rack including a first side and a second side disposed opposite each other; A first guide tooth provided on the first side surface; a second guide tooth movably mounted on the first side surface, the second guide tooth being farther from the second side surface than the first guide tooth; a gear configured to partially engage the rack from a first side and move toward a second side to fully engage the rack; Including, At least one of the first and second leading teeth is configured to engage the gear during movement of the gear from the first side toward the second side.

[0005] In some embodiments, the second leading tooth is configured to move towards the second side under the action of an external force.

[0006] In some embodiments, Toothed part The mating mechanism further includes an attachment member, the attachment member being movably mounted on the first side, and the second guide tooth being mounted on the attachment member.

[0007] In some embodiments, Toothed part The mating mechanism further includes a resilient element disposed between the attachment member and the first side.

[0008] In some embodiments, Toothed part The engagement fitting mechanism further includes a first shaft connecting the mounting member and the rack, the first shaft extending parallel to a connection line between the first side and the second side, and the mounting member configured to translate relative to the rack.

[0009] In some embodiments, the first side includes a first recess, the first recess is recessed toward the second side, and the mounting member is disposed in the first recess, the mounting member including an outer side flush with the first side.

[0010] In some embodiments, the first lead tooth is disposed in the first recess and the attachment member includes a avoidance portion to avoid the first lead tooth.

[0011] In some embodiments, Toothed part The engagement fitting mechanism further includes a second shaft connecting the mounting member and the rack, the second shaft extending in a direction perpendicular to a connection line between the first side and the second side, and the mounting member configured to rock relative to the rack.

[0012] In some embodiments, the first side includes a second recess, the mounting member includes a first mounting portion and a second mounting portion, the first mounting portion is disposed in the second recess, the second guide tooth is disposed in the first mounting portion, and the second shaft connects the second mounting portion and the rack.

[0013] In some embodiments, the rear surface of the rack includes a third recess, the third recess communicates with the second recess, the second mounting portion is disposed in the third recess, and the mounting member includes an outer side flush with the rear surface and the first side of the rack.

[0014] In some embodiments, the first and second lead teeth are located on opposite sides of a central axis of the gear.

[0015] In some embodiments, a first distance exists between a furthest portion of the first guide tooth from the second side and a furthest portion of the second guide tooth from the second side, the second guide tooth is configured to move toward the second side under the action of an external force, a maximum distance of movement is a second distance, the second distance being greater than the first distance.

[0016] In some embodiments, the side of the first guide tooth away from the second side is configured as a first cusp, the side of the second guide tooth away from the second side is configured as a second cusp, the first cusp and the second cusp extend together away from the second side, a portion of the gear for initially engaging the rack is configured as a third cusp, and the first cusp and the second cusp are fitted together into the third cusp.

[0017] In some embodiments, the first pointed portion includes a first beveled surface, a second beveled surface, and a first end surface, the first end surface being formed at a junction between the first beveled surface and the second beveled surface; The second pointed portion includes a third beveled surface, a fourth beveled surface, and a second end surface, the second end surface being formed at a junction between the third beveled surface and the fourth beveled surface.

[0018] In some embodiments, the rack includes two or more first teeth along a longitudinal extension direction, and the first guide tooth is provided on a side end surface of one of the two or more first teeth.

[0019] In some embodiments, the rack comprises two or more first teeth along a longitudinal extension direction, and an upper portion of the first guide tooth and an upper portion of the second guide tooth are both flush with an upper portion of the two or more first teeth.

[0020] In some embodiments of the present disclosure, a logistics system is provided, the logistics system including a logistics vehicle, a frame, and the above-described Toothed part an engagement matching mechanism; Toothed part The gear of the engagement mechanism is provided on the logistics vehicle, Toothed part A rack of the mating mechanism is mounted to the frame, and the logistics vehicle is configured to move along the rack by engagement of the gear and the rack.

[0021] In some embodiments, the logistics system further includes a third shaft and a power mechanism provided in the logistics vehicle, the third shaft connecting the power mechanism and the gear, and the power mechanism configured to drive the gear to move from the first side toward the second side of the rack.

[0022] Based on the above technical solutions, the present disclosure has at least the following advantageous effects:

[0023] In some embodiments, a first guide tooth and a second guide tooth are both provided, and when the gear initially engages the rack, the second guide tooth is closer to the gear than the first guide tooth, and the second guide tooth is able to move relative to the rack, and the first and second guide teeth cooperate with each other to mitigate various disadvantages for guiding the gear into the rack and to facilitate successful guiding of the gear into the rack at all angles of engagement with the rack.

[0024] The drawings illustrated in this specification are used to provide a further understanding of the present disclosure and form a part of this application, and the exemplary embodiments of the present disclosure and their descriptions are intended to illustrate, rather than unduly limit, the present disclosure. [Brief description of the drawings]

[0025] [Figure 1] 13A-13C are schematic diagrams of a toothed portion engaging mating mechanism provided in accordance with some embodiments of the present disclosure. [Diagram 2] 1 is a schematic diagram of a rack and a first guide tooth provided in accordance with some embodiments of the present disclosure. [Diagram 3] 11 is a schematic diagram of an attachment member and a second guide tooth provided in accordance with some embodiments of the present disclosure. [Figure 4] FIG. 2 is a schematic diagram of a gear provided in accordance with some embodiments of the present disclosure. [Diagram 5] 1 is a schematic diagram of an initial engagement between a gear and a first side of a rack provided in accordance with some embodiments of the present disclosure. FIG. [Figure 6] 13A-13C are schematic diagrams of toothed portion engagement fitting mechanisms provided in accordance with certain other embodiments of the present disclosure. [Figure 7] FIG. 7 is a schematic diagram of the rack and mounting member of FIG. 6. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] The technical solutions in the embodiments will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part, not all, of the embodiments of the present disclosure. Based on the embodiments of the present disclosure, any other embodiments obtained by those skilled in the art without creative work should fall within the protection scope of the present disclosure.

[0027] In describing the present disclosure, it should be appreciated that the orientations or positional relationships indicated by the terms "center," "longitudinal," "transverse," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like are orientations or positional relationships illustrated based on the drawings, and are not intended to indicate or imply that the depicted devices or elements have a particular orientation or must be constructed and operated in a particular orientation, but are merely for the convenience of illustrating and facilitating the explanation of the present disclosure, and therefore the terms cannot be construed as limiting the scope of protection of the present disclosure.

[0028] The gear is mounted on the logistics vehicle, and the rack is mounted on the frame, and the logistics vehicle moves along the rack by the engagement of the gear and the rack. During the guiding of the gear of the logistics vehicle into the rack, there is a high possibility that the tooth end face of the gear will not meet the tooth end face of the rack, and when the gear is axially pushed into the rack, the tooth of the gear will engage with the tooth of the rack and rotate by a certain angle, thus achieving the successful engagement of the gear and the rack. However, there are also situations where the tooth end face of the gear is just aligned with the tooth end face of the rack, and the gear abuts against the side of the rack and cannot move axially, resulting in the failure of the axial guiding of the gear into the rack.

[0029] Based on this, in some embodiments of the present disclosure, Toothed part The mating fit feature is provided to alleviate the problem of failure to axially guide the gear into the rack.

[0030] As shown in FIG. 1, in some embodiments, Toothed part The mating mechanism includes a rack 1 , a first guide tooth 2 , a second guide tooth 3 , and a gear 4 .

[0031] The rack 1 includes a first side 11 and a second side 12 arranged opposite to each other. The front side of the rack 1 includes two or more first teeth 13 along the longitudinal extension direction of the rack 1, and the side opposite to the front side of the rack 1 is a rear side 14 of the rack 1. The direction between the first side 11 and the second side 12 is the extension direction of each of the two or more first teeth 13.

[0032] A first guide tooth 2 is provided on a first side 11 of the rack 1 .

[0033] The second guide tooth 3 is movably mounted on a first side 11 of the rack 1 , the second guide tooth 3 being farther from the second side 12 than the first guide tooth 2 .

[0034] The gear 4 includes two or more second teeth 42 in the circumferential direction. The second teeth 42 are configured to engage with the first teeth 13 of the rack 1. The gear 4 is configured to initially engage the rack 1 from the first side 11, move towards the second side 12, and further engage the rack 1, thus fully engaging the rack 1.

[0035] At least one of the first guide tooth 2 and the second guide tooth 3 is configured to engage the gear 4 from the first side 11 towards the second side 12 during movement of the gear 4.

[0036] In some embodiments, as shown in FIG. 5, during the guiding of the gear 4 into the rack 1, the following situations exist in which the gear 4 first engages with the rack 1 from a first side 11 of the rack 1.

[0037] When the end face of one of the second teeth 42 of the gear 4 is located between the end face of the second guide tooth 3 and the end face of the first guide tooth 2, since the second guide tooth 3 is farther from the second side surface 12 than the first guide tooth 2, the second guide tooth 3 contacts the gear 4 first, and the gear 4 rotates under the action of the second guide tooth 3 to a position of correct engagement with the rack 1, thus accurately guiding the gear 4 into the rack 1.

[0038] If the end face of one of the second teeth 42 of the gear 4 is aligned with the end face of the second guide tooth 3, so that the gear 4 cannot rotate in contact with the second guide tooth 3, as the axial force on the gear 4 increases, the second guide tooth 3 moves relative to the first side surface 11 under the force, and if the end face of the second guide tooth 3 is farther from the gear 4 than the end face of the first guide tooth 2, the end face of the first guide tooth 2 begins to approach the end face of another second tooth 42 of the gear 4, rotating the gear 4 by a certain angle after contact, so that the gear 4 rotates to a position of accurate engagement with the rack 1, thus accurately guiding the gear 4 into the rack 1.

[0039] When the end face of one of the second teeth 42 of the gear 4 aligns with the end face of the first guide tooth 2, the second guide tooth 3 contacts the gear 4 earlier than the first guide tooth 2, and since the end face of the second guide tooth 3 does not align with the end face of another corresponding second tooth 42 of the gear 4 due to the geometric relationship, the second guide tooth 3 can still rotate the gear 4 by a certain angle, so that the gear 4 rotates to a position of accurate engagement with the rack 1, thus accurately guiding the gear 4 into the rack 1.

[0040] Therefore, in some embodiments provided in the present disclosure, both a first guide tooth 2 and a second guide tooth 3 are provided, and the first guide tooth 2 and the second guide tooth 3 cooperate with each other to mitigate various disadvantageous factors for guiding the gear 4 into the rack 1 and promote successful guiding of the gear 4 into the rack 1 at any angle to engage with the rack 1.

[0041] In some embodiments, the first leading tooth 2 and the second leading tooth 3 are located on either side of a central axis of the gear 4, respectively.

[0042] Optionally, the first guide tooth 2 is located above the central axis of the gear 4 and the second guide tooth 3 is located below the central axis of the gear 4. Alternatively, the first guide tooth 2 is located below the central axis of the gear 4 and the second guide tooth 3 is located above the central axis of the gear 4.

[0043] In some embodiments, the second leading tooth 3 is adjacent to the first leading tooth 2 .

[0044] In some embodiments, the second leading tooth 3 is configured to move towards the second flank 12 under the action of an external force.

[0045] In some embodiments, a first distance a exists between the farthest portion of the first guide tooth 2 from the second side surface 12 and the farthest portion of the second guide tooth 3 from the second side surface 12, and the second guide tooth 3 is configured to move towards the second side surface 12 under the action of an external force, the maximum distance of movement being a second distance b, the second distance b being greater than the first distance a.

[0046] When the end face of one of the second teeth 42 of the gear 4 is aligned with the end face of the second guide tooth 3, so that the gear 4 cannot rotate in contact with the second guide tooth 3, as the axial force on the gear 4 increases, the second guide tooth 3 moves in a direction toward the second side surface 12 under the force, and since the second distance b is greater than the first distance a, therefore, the second guide tooth 3 moves toward the second side surface 12, so that when the end face of the second guide tooth 3 is farther from the gear 4 than the end face of the first guide tooth 2, the end face of the first guide tooth 2 begins to approach the end face of another second tooth 42 of the gear 4, causing the gear 4 to rotate by a certain angle after contact, so that the gear 4 rotates to a position of accurate engagement with the rack 1, thus achieving accurate guiding of the gear 4 into the rack 1.

[0047] In some embodiments, as shown in FIG. 2, the side of the first guide tooth 2 that is away from the second side 12 is configured as a first cusp 21. As shown in FIG. 3, the side of the second guide tooth 3 that is away from the second side 12 is configured as a second cusp 31. The first cusp 21 and the second cusp 31 extend together away from the second side 12. As shown in FIG. 4, the part of the gear 4 that initially engages the rack 1 is configured as a third cusp 41, and the first cusp 21 and the second cusp 31 are fitted together into the third cusp 41.

[0048] As shown in FIG. 4 , the tooth end surface of each of the two or more second teeth 42 provided in the circumferential direction on the gear 4 is provided with a third cusp portion 41 .

[0049] During the guiding of the gear 4 into engagement with the rack 1, at least one of the first tine portion 21 and the second tine portion 31 is engaged and guided by the third tine portion 41, and the gear 4 can rotate passively without power. In the process of the gear 4 axially approaching and guiding into the rack 1, the gear 4 is axially pushed into the rack 1, and the gear 4 passively rotates by a certain angle under the action of the bevel surfaces of the first tine portion 21 and the second tine portion 31, thus achieving accurate engagement of the gear 4 and the rack 1.

[0050] When the third apex portion 41 of the gear 4 is exactly aligned with the first apex portion 21 or the second apex portion 31 and the gear 4 abuts against the side of the rack 1 and cannot move axially, the first guide tooth 2 and the second guide tooth 3 cooperate to overcome the disadvantageous factor for guiding the gear 4 into the rack 1 and promote successful guiding of the gear 4 into the rack 1 at any angle.

[0051] In some embodiments, as shown in FIG. 2, the first pointed portion 21 includes a first beveled surface 211, a second beveled surface 212, and a first end surface 213, where the first beveled surface 211 and the second beveled surface 212 are connected to the first end surface 213 at their ends close to each other.

[0052] The first bevel surface 211 and the second bevel surface 212 respectively extend from the ends of the two tooth surfaces of the first tooth 13, and the extending ends of the first bevel surface 211 and the second bevel surface 212 are close to each other and connected to the first end surface 213.

[0053] In some embodiments, as shown in FIG. 3, the second pointed portion 31 includes a third bevel surface 311, a fourth bevel surface 312, and a second end surface 313, where the third bevel surface 311 and the fourth bevel surface 312 are connected to the second end surface 313 at their ends proximate to each other.

[0054] In some embodiments, as shown in FIG. 4, the third pointed portion 41 includes a fifth bevel surface 411, a sixth bevel surface 412, and a third end surface 413, where the fifth bevel surface 411 and the sixth bevel surface 412 are connected to the third end surface 413 at their ends closest to each other.

[0055] The fifth bevel surface 411 and the sixth bevel surface 412 respectively extend from the ends of the two tooth surfaces of the second tooth 42, and the extending ends of the fifth bevel surface 411 and the sixth bevel surface 412 are close to each other and connected to the third end surface 413.

[0056] FIG. 5 illustrates the relative positions of the gear 4, the second guide tooth 3 and the first guide tooth 2 when the gear 4 initially engages the rack 1 from the first side 11 of the rack 1 in some embodiments.

[0057] The principle of facilitating accurate guiding of the gear 4 into the rack 1 by the mutual cooperation of the first guide tooth 2 and the second guide tooth 3 is as follows: the third cusp portion 41 of the second tooth 42 of the gear 4 does not contact the second guide tooth 3 and the first guide tooth 2 at the same time, but by using the front-rear and up-down spatial relationship and geometric characteristics of the gears and the rack, the corresponding teeth interact without being influenced by other teeth when the angles of the corresponding teeth are appropriate, and when the corresponding teeth are just aligned and the gear 4 cannot rotate, the adjacent teeth can subsequently interfere and break the just aligned equilibrium state, thereby allowing the guiding to continue.

[0058] In some embodiments, the first leading tooth 2 is provided on a tooth end face of one of the first teeth 13 .

[0059] In some embodiments, the top of the first leading tooth 2 and the top of the second leading tooth 3 are both flush with the top of the first tooth 13 .

[0060] In some embodiments, as shown in FIG. Toothed part The mating mechanism further includes an attachment member 5 movably mounted on the first side 11 , and the second guide tooth 3 is mounted on the attachment member 5 .

[0061] In some embodiments, as shown in FIG. Toothed part The mating mechanism further includes a resilient element 6 , which is provided between the mounting member 5 and the first side surface 11 .

[0062] The mounting member 5 is kept at a second distance b from the rack 1 under the action of the elastic element 6 , i.e. the second guide tooth 3 is kept at a second distance b from the rack 1 under the action of the elastic element 6 .

[0063] In some embodiments, in the process in which the gear 4 is guided into the rack 1 by moving axially from the first side 11 towards the second side 12 of the rack 1, the following situation exists.

[0064] When the third end face 413 of one of the third cusp portions 41 of the gear 4 is located between the second end face 313 of the second cusp portion 31 and the first end face 213 of the first cusp portion 21, the second guide tooth 3 contacts the gear 4 earlier than the first guide tooth 2, so that the gear 4 passively rotates further under the action of the second guide tooth 3 to a position of correct engagement with the rack 1, thus achieving accurate guiding of the gear 4 into the rack 1.

[0065] When the third end face 413 of one of the third cusp portions 41 of the gear 4 is aligned with the second end face 313 of the second cusp portion 31, so that the gear 4 cannot rotate against the second guide tooth 3, as the axial force on the gear 4 increases, the second guide tooth 3 will receive the force, compress the elastic element 6, and move toward the second side surface 12; when the second end face 313 of the second cusp portion 31 is farther from the gear 4 than the first end face 213 of the first cusp portion 21, the first end face 213 of the first cusp portion 21 will begin to approach the fifth bevel surface 411 or the sixth bevel surface 412 of another third cusp portion 41 of the gear 4, causing the gear 4 to rotate by a certain angle after contact, so that the gear 4 rotates to a position of accurate engagement with the rack 1, thus achieving accurate guiding of the gear 4 into the rack 1.

[0066] When the third end face 413 of one of the third cusp portions 41 of the gear 4 is aligned with the first end face 213 of the first cusp portion 21, the second guide tooth 3 contacts the gear 4 earlier than the first guide tooth 2, and since the second end face 313 of the second cusp portion 31 does not align with the third end face 413 of another third cusp portion 41 of the gear 4 due to the geometric relationship, the second guide tooth 3 can still rotate the gear 4 by a certain angle, so that the gear 4 rotates to a position of accurate engagement with the rack 1, thus achieving accurate guiding of the gear 4 into the rack 1.

[0067] In some embodiments, as shown in FIG. Toothed partThe engagement fitting mechanism includes a first shaft 7 that connects the mounting member 5 and the rack 1, the first shaft 7 extending parallel to a connection line between the first side 11 and the second side 12, and the mounting member 5 being configured to translate relative to the rack 1.

[0068] Optionally, the mounting member 5 and the first shaft 7 move simultaneously relative to the rack 1. Alternatively, the first shaft 7 does not move and the mounting member 5 moves along the first shaft 7 to move relative to the rack 1.

[0069] In some embodiments, the first side 11 includes a first recess 111 that is recessed toward the second side 12, and the mounting member 5 is disposed in the first recess 111, and the mounting member 5 includes an outer side that is flush with the first side 11.

[0070] In some embodiments, the first guide tooth 2 is provided in the first recess 111 and the attachment member 5 comprises a avoidance portion 53 to avoid the first guide tooth 2 .

[0071] In some embodiments, the mounting member 5 is connected to the rack 1 by two first shafts 7 .

[0072] 2, the first recess 111 comprises two first holes 114, which are respectively used for passing two first shafts 7, which connect the mount 5 and the rack 1. The first recess 111 also comprises a second hole 115, which is used for mounting the elastic element 6.

[0073] As shown in FIG. 3, the mounting member 5 is configured as a symmetrical structure and includes two third holes 54 and two avoidance portions 53. The two third holes 54 correspond to the two first holes 114 of the rack 1, respectively, and are used for the two first shafts 7 to pass through. The two third holes 54 are formed at two ends of the mounting member 5, respectively, and are symmetrical with respect to the middle of the mounting member 5. The second guide tooth 3 is provided between the two third holes 54, one avoidance portion 53 is formed between the second guide tooth 3 and one of the third holes 54, and the other avoidance portion 53 is formed between the second guide tooth 3 and the other third hole 54, and the two avoidance portions 53 are symmetrical with respect to the middle of the mounting member 5. The mounting member 5 is configured as a symmetrical structure and can be disposed on the rack 1 on one side of the logistics vehicle as well as on the rack 1 on the other side of the logistics vehicle.

[0074] In some embodiments, the mounting member 5 is fixedly connected to two first shafts 7, which pass through two first holes 114 of the rack 1, respectively, such that the second guide tooth 3 and the two first shafts 7 can reciprocate together relative to the rack 1 in the direction of the connecting lines of the first side 11 and the second side 12.

[0075] In some embodiments, the elastic element 6 is attached between the first recess 111 and the attachment member 5 and provides a second distance b between the second guide tooth 3 and the first recess 111 .

[0076] In some embodiments, as shown in FIG. Toothed part The engagement fitting mechanism includes a second shaft 8 that connects the mounting member 5 and the rack 1, the second shaft 8 extending in a direction perpendicular to the connection line between the first side 11 and the second side 12, and the mounting member 5 being configured to swing relative to the rack 1.

[0077] Optionally, the mounting member 5 is fixed to the second shaft 8, and the mounting member 5 and the second shaft 8 rock together relative to the rack 1. Alternatively, the second shaft 8 is fixed to the rack 1, and the mounting member 5 rocks about the second shaft 8 relative to the rack 1.

[0078] 7, the first side 11 includes a second recess 112, the mounting member 5 includes a first mounting portion 51 and a second mounting portion 52, the first mounting portion 51 is disposed in the second recess 112, the second guide tooth 3 is disposed in the first mounting portion 51, and the second shaft 8 connects the second mounting portion 52 and the rack 1. The elastic element 6 is disposed between the first mounting portion 51 and the second recess 112.

[0079] In some embodiments, the rear surface 14 of the rack 1 includes a third recess 113 that communicates with the second recess 112, the second mounting portion 52 is disposed in the third recess 113, and the mounting member 5 includes an outer side that is flush with the rear surface 14 and the first side surface 11 of the rack 1.

[0080] In some embodiments, as shown in Figures 6 and 7, the second mounting part 52 of the mounting member 5 is connected to the rack 1 by a second shaft 8, the second guide tooth 3 is arranged in the first mounting part 51 of the mounting member 5, the elastic element 6 is arranged between the second recess 112 and the first mounting part 51 to provide a second distance b between the second guide tooth 3 and the second recess 112, the rack 1 is machined with the first guide tooth 2, the first guide tooth 2 is adjacent to the position of the second guide tooth 3, and the first and second guide teeth are located respectively on the upper and lower sides of the axis of the gear 4 in height.

[0081] The first guide tooth 2 and the second guide tooth 3 respectively have a first cusp portion 21 and a second cusp portion 31 on the side that first engages with the gear 4. When the third end face 413 of one of the third cusps 41 of the gear 4 aligns with the second end face 313 of the second cusp portion 31, the second guide tooth 3 swings around the second shaft 8 in the direction approaching the second side surface 12, so that the first end face 213 of the first cusp portion 21 begins to approach the fifth bevel surface 411 or the sixth bevel surface 412 of another third cusp portion 41 of the gear 4, causing the gear 4 to rotate by a certain angle after contact, so that the gear 4 rotates to the position of accurate engagement with the rack 1, thus achieving accurate guiding of the gear 4 into the rack 1.

[0082] According to the description of the above embodiment, the second guide tooth 3 may translate relative to the rack 1 or oscillate relative to the rack 1, as long as the second guide tooth 3 can cause a change in the position of the second guide tooth 3 relative to the rack 1 so that the first guide tooth 2 engages with the gear 4.

[0083] In some embodiments, the elastic element 6 comprises a spring.

[0084] In some embodiments, a logistics system is provided, the logistics system including the logistics vehicle, the frame, and the above-described Toothed part Including an engagement matching mechanism; Toothed part The gear 4 of the engagement mechanism is provided on the logistics vehicle, Toothed part The rack 1 of the engagement and matching mechanism is mounted on the frame, and the logistics vehicle is configured to move along the rack 1 by engagement of the gear 4 and the rack 1.

[0085] In some embodiments, the logistics system is Toothed part With the inclusion of an engagement matching mechanism, the gear 4 can be smoothly guided axially into the rack 1 to achieve precise engagement when the logistics vehicle switches from horizontal to vertical motion.

[0086] In some embodiments, the logistics system includes a third shaft 9 and a power mechanism provided in the logistics vehicle, the third shaft 9 connecting the power mechanism and the gear 4, and the power mechanism configured to drive the gear 4 to move from the first side 11 of the rack 1 toward the second side.

[0087] In some embodiments, each logistics vehicle includes two or more sets of Toothed part Equipped with an engagement mechanism, the set Toothed part The engaging and matching mechanisms are distributed symmetrically on the left and right sides of the logistics vehicle. The racks 1 are fixedly mounted on lift rails (not shown in the drawings) provided on the frame.

[0088] In the description of the present disclosure, it should be understood that the use of the terms "first", "second", "third" and the like to define parts and components is only for the convenience of distinguishing the above parts and components. Unless otherwise stated, the above terms do not have any special meaning and therefore cannot be construed as a limitation of the protection scope of the present disclosure.

[0089] In addition, technical features of one embodiment may be advantageously combined with one or more other embodiments, unless expressly denied.

[0090] Finally, it should be noted that the above embodiments are only used for explanation, not for limiting the technical solution of the present disclosure. Although the present disclosure has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still make modifications to the specific implementation of the present disclosure or make equivalent replacements to some of its technical features, and such modifications and equivalent replacements should be included in the scope of the technical solution sought to be protected in the present disclosure, as long as they do not deviate from the spirit of the technical solution of the present disclosure. [Explanation of symbols]

[0091] 1 Rack 2 First guide tooth 3 Second guide tooth 4 Gear 5 Mounting material 6 Elastic Elements 7 First Shaft 8 Second Shaft 9. Third Shaft 11 First aspect 12 The second aspect 13 First Tooth 14 Rear 21 First pointed part 31 Second pointed part 41 Third point 42 Second Tooth 51 First mounting part 52 Second mounting part 53 Avoidance part 54 Third Hole 111 First recess 112 Second Recess 113 The Third Recess 114 First Hole 211 First bevel surface 212 Second bevel surface 213 First end face 311 Third bevel surface 312 Fourth bevel surface 313 Second End Face 411 5th bevel surface 412 6th bevel surface 413 Third End

Claims

1. A rack (1) including a first side (11) and a second side (12) disposed opposite each other; a first leading tooth (2) arranged on said first side surface (11); a second guide tooth (3) movably arranged on the first side surface (11), the second guide tooth (3) being farther away from the second side surface (12) than the first guide tooth (2); a gear (4) configured to partially engage the rack (1) from the first side (11) and move towards the second side (12) to fully engage the rack (1); A toothed portion engagement fitting mechanism comprising: At least one of the first guide tooth (2) and the second guide tooth (3) is configured to engage with the gear (4) during the movement of the gear (4) from the first side (11) towards the second side (12).

2. 2. The toothed portion engagement and adaptation mechanism according to claim 1, wherein the second guide tooth (3) is configured to move towards the second flank (12) under the action of an external force.

3. 3. The toothed portion engagement and adaptation mechanism according to claim 1 or 2, further comprising an attachment member (5), the attachment member (5) being movably provided on the first side surface (11), and the second guide teeth (3) being provided on the attachment member (5).

4. The toothed portion engagement and matching mechanism according to claim 3, further comprising a resilient element (6) provided between the mounting member (5) and the first side surface (11).

5. 5. The toothed portion engagement and fitting mechanism according to claim 3 or 4, further comprising a first shaft (7) connecting the mounting member (5) and the rack (1), the first shaft (7) extending parallel to a connection line between the first side (11) and the second side (12), and the mounting member (5) configured to translate relative to the rack (1).

6. 6. The toothed portion engagement and matching mechanism according to claim 3, wherein the first side (11) comprises a first recess (111), the first recess (111) is recessed towards the second side (12), and the mounting member (5) is disposed in the first recess (111), the mounting member (5) including an outer side surface flush with the first side (11).

7. 7. The toothed portion engagement and matching mechanism according to claim 6, wherein the first guide tooth (2) is provided in the first recess (111) and the mounting member (5) comprises an avoidance portion (53) for avoiding the first guide tooth (2).

8. The toothed portion engagement and fitting mechanism according to claim 3 or 4, further comprising a second shaft (8) connecting the mounting member (5) and the rack (1), the second shaft (8) extending in a direction perpendicular to a connection line between the first side (11) and the second side (12), and the mounting member (5) configured to pivot relative to the rack (1).

9. 9. The toothed portion engagement and matching mechanism according to claim 8, wherein the first side (11) comprises a second recess (112), the mounting member (5) comprises a first mounting portion (51) and a second mounting portion (52), the first mounting portion (51) is arranged in the second recess (112), the second guide teeth (3) are arranged in the first mounting portion (51), and the second shaft (8) connects the second mounting portion (52) and the rack (1).

10. 10. The toothed portion engagement and matching mechanism according to claim 9, wherein the rear face (14) of the rack (1) comprises a third recess (113), the third recess (113) communicates with the second recess (112), the second mounting portion (52) is disposed in the third recess (113), and the mounting member (5) includes an outer side surface flush with the rear face (14) and the first side surface (11) of the rack (1).

11. 11. The toothed portion engagement and matching mechanism according to any one of claims 1 to 10, wherein the first and second guide teeth (2, 3) are respectively located on either side of a central axis of the gear (4).

12. 12. The toothed portion engagement and adaptation mechanism according to claim 1, wherein a first distance (a) exists between a portion of the first leading tooth (2) that is furthest from the second side surface (12) and a portion of the second leading tooth (3) that is furthest from the second side surface (12), the second leading tooth (3) being configured to move towards the second side surface (12) under the action of an external force, the maximum distance of the movement being a second distance (b), the second distance (b) being greater than the first distance (a).

13. 13. The toothed portion engagement and adaptation mechanism according to claim 1, wherein a side of the first leading tooth (2) that is remote from the second side (12) is configured as a first cusp (21), a side of the second leading tooth (3) that is remote from the second side (12) is configured as a second cusp (31), the first cusp (21) and the second cusp (31) extend together away from the second side (12), and a part of the gear (4) for initially engaging the rack (1) is configured as a third cusp (41), and the first cusp (21) and the second cusp (31) are both fitted into the third cusp (41).

14. the first pointed portion (21) includes a first beveled surface (211), a second beveled surface (212), and a first end surface (213), the first end surface (213) being formed at a junction between the first beveled surface (211) and the second beveled surface (212); 14. The toothed portion engagement and matching mechanism of claim 13, wherein the second pointed portion (31) includes a third bevel surface (311), a fourth bevel surface (312), and a second end surface (313), the second end surface (313) being formed at a junction between the third bevel surface (311) and the fourth bevel surface (312).

15. 15. The toothed portion engagement and matching mechanism according to any one of claims 1 to 14, wherein the rack (1) comprises two or more first teeth (13) along its longitudinal extension direction, and the first guide tooth (2) is provided on a lateral end surface of one of the two or more first teeth (13).

16. 16. The toothed portion engagement and matching mechanism according to any one of claims 1 to 15, wherein the rack (1) comprises two or more first teeth (13) along its longitudinal extension, and an upper portion of the first guide tooth (2) and an upper portion of the second guide tooth (3) are both flush with an upper portion of the two or more first teeth (13).

17. A logistics system comprising a logistics vehicle, a frame, and the toothed portion engagement and adaptation mechanism according to any one of claims 1 to 16, wherein the gear (4) of the toothed portion engagement and adaptation mechanism is provided on the logistics vehicle, the rack (1) of the toothed portion engagement and adaptation mechanism is provided on the frame, and the logistics vehicle is configured to move along the rack (1) by engagement of the gear (4) and the rack (1).

18. The logistics system of claim 17, further comprising a third shaft (9) and a power mechanism provided in the logistics vehicle, the third shaft (9) connecting the power mechanism and the gear (4), the power mechanism configured to drive the gear (4) to move from the first side (11) towards the second side (12) of the rack (1).

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