Two-way dovetail self-centering composite differential screw locking mechanism

Abstract

The application provides a bidirectional dovetail self-centering composite differential screw locking mechanism, which is provided with a vehicle-mounted support and a battery box, the middle part of the two sides of the battery box is provided with a battery box beam, the vehicle-mounted support and the battery box are fixedly connected through the differential screw locking mechanism, and the differential screw locking mechanism comprises a vehicle-mounted support fixed dovetail sliding table assembly and a battery box beam fixed dovetail sliding table assembly. The vehicle-mounted support fixed dovetail sliding table assembly comprises a Y-direction dovetail sliding table, a Y-direction dovetail sliding plate and a Z-direction self-centering conical nut suspender, and the battery box beam fixed dovetail sliding table assembly comprises an X-direction dovetail sliding table, an X-direction dovetail sliding plate and a stepped locking screw. The application has the advantages of simple structure, convenient operation, three-axis self-centering positioning and adjustment, two-stage composite differential screw transmission structure, elimination of the gap between the battery box beam and the vehicle-mounted support, fast and firm fixation of the battery box on the vehicle-mounted support, and wide application in the field of new energy battery replacement technology.

Description

Technical Field

[0001] This invention relates to the field of new energy battery swapping technology, and in particular to a bidirectional dovetail self-centering composite differential spiral locking mechanism. Background Technology

[0002] It not only aligns with the major policy environment of carbon peaking and carbon neutrality, but also has significant economic benefits. As one of the few sunrise industries, the battery swapping project for gasoline vehicles is booming towards large-scale and widespread development as the driving range of power batteries continues to break through.

[0003] Due to the wide variety of vehicle types and structures, especially in battery swapping for medium and heavy-duty trucks, the weight of the battery pack inevitably leads to unexpected situations during vehicle operation. Therefore, significant acceleration is easily generated both in the direction of travel (X-axis) and perpendicular to the road (Z-axis). Furthermore, national standards regarding vehicle structure and appearance do not provide sufficient installation space for the locking mechanism. Therefore, to ensure the safe and rapid positioning and installation of the battery pack, improvements to the battery pack locking mechanism are necessary to address a common challenge in the medium and heavy-duty truck battery swapping industry. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the above-mentioned technology and provide a bidirectional dovetail self-centering composite differential spiral locking mechanism that can quickly position and fix the battery box and the vehicle bracket together.

[0005] To address this, the present invention provides a bidirectional dovetail self-centering composite differential screw locking mechanism, which includes a vehicle-mounted bracket and a battery box. Battery box beams are provided in the middle of both sides of the battery box. The vehicle-mounted bracket and the battery box are fixedly connected by a differential screw locking mechanism. The differential screw locking mechanism includes a vehicle-mounted bracket fixing dovetail slide assembly and a battery box beam fixing dovetail slide assembly.

[0006] The vehicle-mounted bracket fixing dovetail slide assembly includes a Y-direction dovetail slide, a Y-direction dovetail slide plate, and a Z-direction self-centering conical nut hanger. The Y-direction dovetail slide is fixedly connected to the vehicle-mounted bracket, the Y-direction dovetail slide plate is slidably connected to the Y-direction dovetail slide, the top of the Z-direction self-centering conical nut hanger is threadedly connected to the Y-direction dovetail slide plate, and the bottom of the Z-direction self-centering conical nut hanger is provided with a conical nut inverted cone, and the bottom surface of the conical nut inverted cone is provided with a first locking internal thread hole.

[0007] The battery box beam fixing dovetail slide assembly includes an X-axis dovetail slide, an X-axis dovetail slide plate, and a stepped locking screw. The X-axis dovetail slide is fixedly connected to the battery box beam, and the X-axis dovetail slide plate is slidably connected to the X-axis dovetail slide. The X-axis dovetail slide plate has interconnected feed internal thread holes and positioning centering internal conical holes from bottom to top. The inverted conical nut is located in and fits into the positioning centering internal conical hole. The top of the stepped locking screw passes through the feed internal thread hole and is threadedly connected to the first locking internal thread hole of the inverted conical nut. The middle part of the stepped locking screw is threadedly fixed to the feed internal thread hole.

[0008] The sliding direction of the Y-axis dovetail skateboard on the Y-axis dovetail slide is perpendicular to the sliding direction of the X-axis dovetail skateboard on the X-axis dovetail slide.

[0009] Preferably, the cross-sectional area of ​​the inner conical hole for positioning and centering decreases sequentially from top to bottom.

[0010] Preferably, the top of the Y-direction dovetail slide is provided with an inverted T-shaped dovetail protrusion, and the lower part of the Y-direction dovetail slide is provided with a dovetail groove that matches the inverted T-shaped dovetail protrusion. The Y-direction dovetail slide is slidably connected to the Y-direction dovetail slide through the dovetail groove.

[0011] Preferably, the bottom of the X-direction dovetail slide is provided with a T-shaped dovetail protrusion, and the top of the X-direction dovetail slide is provided with a dovetail groove that matches the T-shaped dovetail protrusion. The X-direction dovetail slide is slidably connected to the X-direction dovetail slide through the dovetail groove.

[0012] Preferably, the top outer periphery of the stepped locking screw is provided with a first locking external thread and a feed external thread from top to bottom. The feed external thread is threadedly connected to the feed internal thread hole of the X-direction dovetail slide, and the first locking external thread is threadedly connected to the first locking internal thread hole of the tapered nut's inverted cone.

[0013] Preferably, the top outer periphery of the Z-direction self-centering conical nut rod is provided with a second locking external thread, and the Y-direction dovetail slide plate is provided with a second locking internal thread hole. The Z-direction self-centering conical nut rod is threadedly connected to the Y-direction dovetail slide plate through the second locking external thread.

[0014] Preferably, the pitch of the feed external thread, the first locking external thread, and the second locking external thread decreases sequentially.

[0015] Preferably, the vehicle-mounted bracket and the Y-axis dovetail slide are connected by a Y-axis slot, and the Z-axis self-aligning conical nut hanger is located within the Y-axis slot. The extension direction of the Y-axis slot is consistent with the sliding direction of the Y-axis dovetail slide. The battery box beam and the X-axis dovetail slide are connected by an X-axis slot, and the stepped locking screw is located within the X-axis slot. The extension direction of the X-axis slot is consistent with the sliding direction of the X-axis dovetail slide.

[0016] Preferably, the bottom of the stepped locking screw is provided with an external spline shaft.

[0017] Preferably, a flexible pad is provided between the vehicle-mounted bracket and the battery box beam.

[0018] This invention provides a bidirectional dovetail self-centering composite differential screw locking mechanism, which has the following characteristics:

[0019] Beneficial effects:

[0020] (i) The Z-axis self-aligning conical nut hanger is threaded onto the Y-axis dovetail slide plate, the sliding direction (Y-axis) of which is perpendicular to the vehicle's driving direction. The stepped locking screw is threaded onto the X-axis dovetail slide plate, which has a machined positioning and alignment inner conical hole, the sliding direction (X-axis) of which is parallel to the vehicle's driving direction. Since the Z-axis self-aligning conical nut hanger and the stepped locking screw can move in the X, Y, and Z directions, and the outer conical surface of the Z-axis self-aligning conical nut hanger mates with the inner conical surface of the X-axis dovetail slide plate with the machined positioning and alignment inner conical hole, the problem of simultaneous alignment and positioning of multiple locking units caused by warping and deformation of vehicle-mounted brackets, etc., is avoided.

[0021] (ii) The sliding direction (Y direction) of the Y-axis dovetail slide plate fixed on the vehicle bracket is perpendicular to the sliding direction (X direction) of the X-axis dovetail slide plate fixed on the battery box beam. With the cooperation of the Y-axis slot and the X-axis slot, the combination of the X-axis dovetail slide plate and the Y-axis dovetail slide plate has a mutual limiting function, which improves the positioning efficiency.

[0022] (III) A two-stage composite differential screw drive structure is adopted to ensure that the locking thread fit clearance is eliminated while ensuring that the Z-direction self-centering conical nut hanger does not separate from the Y-direction dovetail slide plate fixed to the vehicle bracket. At the same time, the decreasing differential screw layout structure can avoid the impact on the locking force caused by excessive tightness between the outer conical surface of the Z-direction self-centering conical nut hanger and the inner conical surface of the X-direction dovetail slide plate with the positioning and centering inner conical hole fixed to the battery box beam during the battery box installation and locking process.

[0023] (iv) With the outer conical surface of the Z-axis self-aligning conical nut hanger engaging with the inner conical surface of the X-axis dovetail slide plate, which has a machined positioning and alignment inner conical hole fixed to the battery box beam, self-alignment is achieved. Due to the characteristics of the conical surface engagement, the shear stress generated during vehicle operation will be borne by this conical surface engagement. The Z-axis self-aligning conical nut hanger and the stepped locking screw only bear the Z-axis tensile force. This design only requires ensuring that the tensile strength of the Z-axis self-aligning conical nut hanger meets the locking force requirements, minimizing the strength requirements of the Z-axis self-aligning conical nut hanger. This reduces manufacturing costs while maximizing service life and ensuring the safety of the battery box.

[0024] (v) When multiple locking units are arranged in an array on the vehicle mount, the characteristic of the conical fit—the difference in diameter between the large and small ends—determines that the battery box can be automatically adjusted to adapt to the vehicle's stationary posture within a limited range by using the RGV's built-in vehicle plate rotation function, without additional power, i.e., adapting to the angle between the vehicle's centerline and the RGV's centerline when the vehicle's centerline is not parallel to the RGV's centerline. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a combination diagram of the vehicle-mounted bracket fixing dovetail slide assembly and the battery box beam fixing dovetail slide assembly of the present invention;

[0027] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure;

[0028] Figure 4 This is a schematic diagram of the Z-axis self-aligning tapered nut hanger;

[0029] Figure 5 This is a schematic diagram of the Y-axis dovetail slide.

[0030] Figure 6 This is a schematic diagram of the stepped locking screw.

[0031] Figure 7 This is a schematic diagram of the X-axis dovetail slide.

[0032] Figure 8 This is a schematic diagram of the X-axis dovetail slide.

[0033] The diagram shows the following markings: 1. Vehicle-mounted bracket, 11. Y-axis slot, 12. Flexible pad, 2. Battery box, 21. Battery box beam, 211. X-axis slot, 3. Vehicle-mounted bracket fixing dovetail slide assembly, 31. Y-axis dovetail slide, 311. Dovetail boss, 32. Y-axis dovetail slide plate, 321. Dovetail groove, 322. Second locking internal thread hole, 33. Z-axis self-centering conical nut hanger, 331. Conical nut inverted cone, 332. First locking internal thread hole, 333. Second locking external thread, 4. Battery box beam fixing dovetail slide assembly, 41. X-axis dovetail slide, 42. X-axis dovetail slide plate, 421. Feed internal thread hole, 422. Positioning and centering internal conical hole, 43. Stepped locking screw, 431. First locking external thread, 432. Feed external thread, 433. External spline shaft. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; and unless otherwise specified, the apparatus used are conventional commercially available products.

[0035] It should be noted that the X direction mentioned in this invention refers to the vehicle's direction of travel, the Y direction refers to the direction perpendicular to the vehicle's direction of travel in the horizontal plane, and the Z direction refers to the vertical direction. The three directions are perpendicular to each other, which can achieve the purpose of three-axis self-centering and gap elimination to lock the vehicle bracket 1 and battery box beam 21.

[0036] Depend on Figure 1 As shown, the present invention provides a bidirectional dovetail self-centering composite differential screw locking mechanism, which includes a vehicle-mounted bracket 1 and a battery box 2. Battery box beams 21 are provided in the middle of both sides of the battery box 2. The vehicle-mounted bracket 1 and the battery box 2 are fixedly connected by a differential screw locking mechanism. The differential screw locking mechanism includes a vehicle-mounted bracket fixing dovetail slide assembly 3 and a battery box beam fixing dovetail slide assembly 4. The vehicle-mounted bracket fixing dovetail slide assembly 3 is fixed on the vehicle-mounted bracket 1, and the battery box beam fixing dovetail slide assembly 4 is fixed on the battery box beam 21. The split design facilitates the fixing of the vehicle-mounted bracket 1 and the battery box 2.

[0037] Specifically, by Figures 2-5 As shown, the vehicle-mounted bracket fixing dovetail slide assembly 3 includes a Y-direction dovetail slide 31, a Y-direction dovetail slide plate 32, and a Z-direction self-centering conical nut hanger 33. The bottom of the Y-direction dovetail slide 31 is fixedly connected to the vehicle-mounted bracket 1. The top of the Y-direction dovetail slide 31 is provided with an inverted T-shaped dovetail boss 311, the extension direction of which is perpendicular to the vehicle's travel direction. The lower part of the Y-direction dovetail slide plate 32 is provided with a dovetail groove 321 that matches the inverted T-shaped dovetail boss 311. The Y-direction dovetail slide plate 32 is slidably connected to the Y-direction dovetail slide 31 through the dovetail groove 321, that is, the Y-direction dovetail slide plate 32 can slide back and forth along the Y-direction dovetail slide 31 in a direction perpendicular to the vehicle's travel direction. The cross-section of the dovetail boss 311 is an isosceles trapezoidal design, which ensures that the Y-direction dovetail slide plate 32 can slide stably along the Y-direction dovetail slide 31 and also makes the force evenly distributed, thus improving the product's lifespan. The top outer periphery of the Z-direction self-centering conical nut hanger 33 is provided with a second locking external thread 333, and the Y-direction dovetail slide plate 32 is provided with a second locking internal thread hole 322. The Z-direction self-centering conical nut hanger 33 is threadedly connected to the Y-direction dovetail slide plate 32 through the second locking external thread 333. The bottom end of the Z-direction self-centering conical nut hanger 33 is also provided with a conical nut inverted cone 331. The conical nut inverted cone 331 is designed as an inverted cone, and its cross-sectional area decreases from top to bottom, which facilitates positioning and connection with the battery box beam fixing dovetail slide plate assembly 4. The bottom surface of the conical nut inverted cone 331 is provided with a first locking internal thread hole 332.

[0038] Depend on Figure 2 , Figure 3 , Figures 6-8 As shown, the battery box beam fixing dovetail slide assembly 4 includes an X-direction dovetail slide 41, an X-direction dovetail slide plate 42, and a stepped locking screw 43. The X-direction dovetail slide 41 is fixedly connected to the lower end face of the battery box beam 21. The bottom of the X-direction dovetail slide 41 is provided with a T-shaped dovetail boss 311. The top of the X-direction dovetail slide plate 42 is provided with a dovetail groove 321 that matches the T-shaped dovetail boss 311. The X-direction dovetail slide plate 42 is slidably connected to the X-direction dovetail slide 41 through the dovetail groove 321, that is, the X-direction dovetail slide plate 42 can slide left and right along the X-direction dovetail slide 41 in the direction of vehicle travel. The X-direction dovetail slide plate 42 is T-shaped, and its middle part is provided with interconnected feed internal thread holes 421 and positioning centering inner conical holes 422 from bottom to top. The conical nut inverted cone 331 is provided in the positioning centering inner conical hole 422 and matches it. The top outer periphery of the stepped locking screw 43 is provided with a first locking external thread 431 and a feed external thread 432 from top to bottom. The feed external thread 432 is threadedly connected to the feed internal thread hole 421 of the X-direction dovetail slide plate 42, so that the stepped locking screw 43 is fixed to the lower part of the X-direction dovetail slide plate 42. The first locking external thread 431 of the stepped locking screw 43 passes through the feed internal thread hole 421 and is threadedly connected to the first locking internal thread hole 332 of the tapered nut inverted cone 331, so that the vehicle bracket 1 and the battery box 2 are fixed together.

[0039] Preferably, the pitches of the feed external thread 432, the first locking external thread 431, and the second locking external thread 333 decrease sequentially, forming a decreasing pitch layout design. The first-stage thread drive consists of a stepped locking screw 43 and the first locking internal thread hole 332 of the Z-direction self-centering tapered nut hanger 33, wherein the feed external thread 432 of the stepped locking screw 43 is a power thread. The second-stage thread drive consists of the first locking internal thread hole 332 of the Z-direction self-centering tapered nut hanger 33 and the second locking internal thread hole 322 of the Y-direction dovetail slide plate 32, wherein the locking internal thread of the first locking internal thread hole 332 of the Z-direction self-centering tapered nut hanger 33 is a power thread.

[0040] When the stepped locking screw 43 is rotated, the synchronously rotating first locking external thread 431 engages with the first locking internal thread hole 332 of the Z-direction self-centering conical nut hanger 33, causing the Z-direction self-centering conical nut hanger 33 to displace along the plumb line (Z direction). Since the pitches of the first locking external thread 431 and the second locking external thread 333 decrease sequentially, the battery box 2 moves upward (the vehicle bracket 1 is fixed), shortening the gap between the battery box beam 21 and the vehicle bracket 1. Due to the resistance of the engagement between the outer conical surface of the Z-direction self-centering conical nut hanger 33 and the inner conical surface of the X-direction dovetail slide plate 42 with the machined positioning and centering inner conical hole 422, especially as the locking force gradually increases, the resistance of the conical surface engagement will increase accordingly. Until the torque generated by the engagement resistance of the two conical surfaces exceeds the locking torque generated by the stepped locking screw 43, the second locking external thread 333 of the Z-direction self-centering conical nut hanger 33 will no longer displace.

[0041] Meanwhile, due to the adoption of a compound differential screw drive, the first locking internal thread hole 332 and the second locking external thread 333 of the Z-direction self-centering conical nut hanger 33 will automatically distribute the feed amount input by the stepped locking screw 43, under the condition that the outer conical surface of the Z-direction self-centering conical nut hanger 33 mates with the inner conical surface of the X-direction dovetail slide plate 42 which has a machined positioning and centering internal conical hole 422. This ensures both the elimination of thread backlash during the locking process and that the Z-direction self-centering conical nut hanger 33 will not disengage from the Y-direction dovetail slide plate 32.

[0042] When the Z-axis self-centering conical nut hanger 33 stops rotating due to resistance, the stepped locking screw 43 continues to rotate. Since the pitch of the feed external thread 432 and the first locking external thread 431 decreases sequentially, under the rotational power of the stepped locking screw 43, the X-axis dovetail slide plate 42 drives the battery box 2 to continue to move upward, completely eliminating the gap between the two and firmly fixing the battery box 2 on the vehicle bracket 1.

[0043] Preferably, the vehicle-mounted bracket 1 and the Y-direction dovetail slide 31 are connected by a Y-direction slot 11, and the Z-direction self-aligning conical nut hanger 33 is disposed in the Y-direction slot 11. The extension direction of the Y-direction slot 11 is consistent with the sliding direction of the Y-direction dovetail slide 32. During installation, the Y-direction dovetail slide 32 is first slidably connected to the top of the Y-direction dovetail slide 31. The top end of the Z-direction self-aligning conical nut hanger 33 passes through the Y-direction slot 11 and is threadedly connected to the Y-direction dovetail slide 32. The Y-direction dovetail slide 32 can slide as the Z-direction self-aligning conical nut hanger 33 moves back and forth in the Y-direction slot 11. The limited movement of the Z-direction self-aligning conical nut hanger 33 in the Y-direction slot 11 achieves the effect of height alignment between the Z-direction self-aligning conical nut hanger 33 and the X-direction dovetail slide 42, which has a machined positioning and centering inner conical hole 422. The battery box beam 21 and the X-direction dovetail slide 41 are connected by an X-direction slot 211. A stepped locking screw 43 is located in the X-direction slot 211, and the extension direction of the X-direction slot 211 is consistent with the sliding direction of the X-direction dovetail slide 42. During installation, the X-direction dovetail slide 42 is first slidably connected to the bottom of the X-direction dovetail slide 41. The top of the stepped locking screw 43 passes through the feed internal thread hole 421, and the feed external thread 432 in the middle is threadedly connected to the feed internal thread hole 421, so that the stepped locking screw 43 is fixed to the bottom of the X-direction dovetail slide 42. Limiting structures are also provided at both ends of the X-direction dovetail slide 41 to prevent the X-direction dovetail slide 42 from falling off.

[0044] Preferably, the bottom of the stepped locking screw 43 is also provided with an external spline shaft 433 to facilitate the locking operation of the RGV trolley locking actuator docking with the stepped locking screw 43.

[0045] Preferably, a flexible pad 12 is also provided between the vehicle-mounted bracket 1 and the battery box beam 21, and the flexible pad 12 is fixedly connected to the vehicle-mounted bracket 1. The flexible pad 12 is provided to prevent the battery box beam 21 from having a hard collision with the vehicle-mounted bracket 1.

[0046] The working process of this invention is as follows:

[0047] First, a power actuator (such as an RGV) with automatic positioning, lifting, and internal spline tightening functions transports the battery box 2 to the area below the truck main beam and the vehicle-mounted bracket 1. Using the RGV's built-in vision and laser ranging functions, the Z-axis self-aligning conical nut hanger 33 of the vehicle-mounted bracket fixing dovetail slide assembly 3, which is fixed to the vehicle-mounted bracket 1, and the stepped locking screw 43 in the battery box beam fixing dovetail slide assembly 4 are initially aligned and positioned.

[0048] Then, the RGV starts the lifting function. During the process of lifting the battery box 2 to the corresponding position, the Z-direction self-centering conical nut hanger 33 of the vehicle bracket fixing dovetail slide assembly 3 passes through the battery box beam 21 and the X-direction slot 211 of the X-direction dovetail slide 41. The outer conical surface of the conical nut inverted cone 331 at its lower end cooperates with the inner conical surface of the X-direction dovetail slide plate 42 in the battery box beam fixing dovetail slide assembly 4, so as to realize the alignment of the first locking internal thread hole 332 of the Z-direction self-centering conical nut hanger 33 with the first locking external thread 431 of the stepped locking screw 43, that is, to realize the final centering and positioning of the battery box 2 and the vehicle bracket 1. During the positioning process, since the Y-axis dovetail slide plate 32 can slide on the Y-axis dovetail slide 31 in a direction perpendicular to the vehicle's movement, and the X-axis dovetail slide plate 42 can slide on the X-axis dovetail slide 41 in the direction of the vehicle's movement, the Z-axis self-centering conical nut hanger 33 and the stepped locking screw 43 can achieve three-axis self-centering positioning adjustment in the X, Y, and Z directions, making positioning simple and convenient.

[0049] After positioning, the RGV starts the internal spline tightening function, which cooperates with the external spline shaft 433 at the end of the stepped locking screw 43. The first locking external thread 431 of the stepped locking screw 43 locks with the first locking internal thread hole 332 of the Z-direction self-centering tapered nut hanger 33, thus locking the battery box 2 firmly onto the vehicle bracket 1 without gaps.

[0050] The disassembly procedure for battery box 2 is the reverse of the installation procedure.

[0051] This invention has a simple structure and is easy to operate. By setting the Y-axis dovetail slide plate 32 and the X-axis dovetail slide plate 42, the Z-axis self-centering conical nut hanger 33 and the stepped locking screw 43 can achieve three-axis self-centering positioning adjustment in the X, Y and Z directions. At the same time, a two-stage composite differential screw transmission structure is adopted to eliminate the gap between the battery box beam 21 and the vehicle bracket 1, so as to quickly and firmly fix the battery box 2 on the vehicle bracket 1. It can be widely used in the field of new energy battery swapping technology.

[0052] In the description of this invention, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and 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 invention.

[0053] However, the above description is merely a specific embodiment of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of the present invention should still fall within the scope of the claims of the present invention.

Claims

1. A bidirectional dovetail self-centering composite differential screw locking mechanism, which is provided with a vehicle-mounted support and a battery box, the middle part of both sides of the battery box is provided with a battery box beam, characterized in that, The vehicle-mounted support and the battery box are fixedly connected through a differential screw locking mechanism, the differential screw locking mechanism comprises a vehicle-mounted support fixed dovetail sliding table assembly and a battery box beam fixed dovetail sliding table assembly; The vehicle-mounted support fixed dovetail sliding table assembly comprises a Y-direction dovetail sliding table, a Y-direction dovetail sliding plate and a Z-direction self-centering conical nut lifting rod, the Y-direction dovetail sliding table is fixedly connected with the vehicle-mounted support, the Y-direction dovetail sliding plate is slidingly connected with the Y-direction dovetail sliding table, the top end of the Z-direction self-centering conical nut lifting rod is threadedly connected with the Y-direction dovetail sliding plate, and the bottom end of the Z-direction self-centering conical nut lifting rod is provided with a conical nut inverted conical table. The battery box beam fixed dovetail sliding table assembly comprises an X-direction dovetail sliding table, an X-direction dovetail sliding plate and a stepped locking screw rod, the X-direction dovetail sliding table is fixedly connected with the battery box beam, and the X-direction dovetail sliding plate is slidingly connected with the X-direction dovetail sliding table. The X-direction dovetail sliding plate is sequentially provided with a feeding internal thread hole and a positioning and centering internal conical hole which are in communication with each other from bottom to top, the conical nut inverted conical table is arranged in the positioning and centering internal conical hole and is matched with the positioning and centering internal conical hole, and the top portion of the stepped locking screw rod is threadedly connected with the first locking internal thread hole of the conical nut inverted conical table through the feeding internal thread hole. The sliding direction of the Y-direction dovetail sliding plate on the Y-direction dovetail sliding table is perpendicular to the sliding direction of the X-direction dovetail sliding plate on the X-direction dovetail sliding table.

2. A bidirectional dovetail self-aligning composite differential screw locking mechanism according to claim 1, wherein, The cross-sectional area of the positioning and centering internal conical hole decreases from top to bottom.

3. A bidirectional dovetail self-aligning composite differential screw locking mechanism according to claim 1, wherein, The top portion of the Y-direction dovetail sliding table is provided with an inverted T-shaped dovetail boss, the lower portion of the Y-direction dovetail sliding plate is provided with a dovetail sliding groove matched with the inverted T-shaped dovetail boss, and the Y-direction dovetail sliding plate is slidingly connected with the Y-direction dovetail sliding table through the dovetail sliding groove.

4. A bidirectional dovetail self-aligning composite differential screw locking mechanism according to claim 1, wherein, The bottom portion of the X-direction dovetail sliding table is provided with a T-shaped dovetail boss, the top portion of the X-direction dovetail sliding plate is provided with a dovetail sliding groove matched with the T-shaped dovetail boss, and the X-direction dovetail sliding plate is slidingly connected with the X-direction dovetail sliding table through the dovetail sliding groove.

5. A bidirectional dovetail self-aligning composite differential screw locking mechanism according to claim 1, wherein, The top portion of the stepped locking screw rod is sequentially provided with a first locking external thread and a feeding external thread from top to bottom, the feeding external thread is threadedly connected with the feeding internal thread hole of the X-direction dovetail sliding plate, and the first locking external thread is threadedly connected with the first locking internal thread hole of the conical nut inverted conical table.

6. A bidirectional dovetail self-aligning compound differential screw locking mechanism according to claim 5, wherein, The top end of the Z-direction self-centering conical nut lifting rod is provided with a second locking external thread, the Y-direction dovetail sliding plate is provided with a second locking internal thread hole, and the Z-direction self-centering conical nut lifting rod is threadedly connected with the Y-direction dovetail sliding plate through the second locking external thread.

7. A bidirectional dovetail self-aligning compound differential screw locking mechanism according to claim 6, wherein, The pitches of the feeding external thread, the first locking external thread and the second locking external thread decrease in sequence.

8. A bidirectional dovetail self-aligning composite differential screw locking mechanism according to claim 1, wherein, The Y-direction slot hole is arranged through the Y-direction dovetail sliding table, the Z-direction self-centering conical nut suspender is arranged in the Y-direction slot hole, and the extension direction of the Y-direction slot hole is consistent with the sliding direction of the Y-direction dovetail sliding plate.

9. A bidirectional dovetail self-aligning composite differential screw locking mechanism according to claim 1, wherein, The bottom of the stepped locking screw rod is provided with an external spline shaft.

10. A bidirectional dovetail self-aligning composite differential screw locking mechanism according to claim 1, wherein, A flexible cushion block is arranged between the vehicle-mounted support and the battery box beam.

Images