Modular assemblable automobile test weight

Abstract

The utility model provides a kind of modularization can be assembled automobile test counterweight, belong to new energy automobile technical field. Including multiple base type counterweight, at least one outer surface of base type counterweight is provided with multiple protrusions, at least another outer surface of base type counterweight is provided with multiple recesses, multiple the base type counterweight is inserted and is connected to realize firm assembly by protrusion and recess, every base type counterweight is provided with limit locking structure, and multiple base type counterweight is locked by limit locking structure. The cooperation of protrusion and recess provides firm support for vertical stacking, and limit locking structure improves the connection stability between adjacent counterweight, even when vehicle is in dynamic test such as sudden acceleration, high-speed turning, counterweight also does not occur relative movement or separation, eliminates the security risk that traditional counterweight is easy to slip and scatter, can solve the technical problems such as poor stability, heavy, inflexible, poor versatility of counterweight in prior art.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive test counterweights, and in particular to a modular, assembleable automotive test counterweight. Background Technology

[0002] Automotive test counterweights are important auxiliary equipment in the automotive research and development and testing process. They are mainly used to simulate the performance of vehicles under different load conditions, including handling stability testing, braking performance testing, and power performance testing. In actual tests, the counterweight mass needs to be flexibly adjusted according to different test requirements to simulate different numbers of passengers and cargo loads.

[0003] The existing automotive test counterweights suffer from the following main problems: First, the installation and fixing methods are complex. Current counterweights typically require external fasteners such as straps, bolts, and clips to secure them to the vehicle. The installation and disassembly process is cumbersome and time-consuming. When multiple counterweights are stacked, there is a lack of effective positioning and locking mechanisms; their relative positions are maintained solely by external constraints. In practice, workers need to place each counterweight individually and then secure it with straps or bolts. This process usually requires two people, resulting in low efficiency. Furthermore, when the counterweight mass needs to be adjusted, the entire process of disassembly and installation must be repeated, wasting significant time and manpower. Secondly, there are issues with stability and safety. Traditional counterweights lack reliable connection structures and rely solely on gravity and friction to maintain their stacked state. During dynamic tests such as rapid acceleration, emergency braking, or high-speed cornering, the counterweights are prone to slippage, tipping, or even falling off the vehicle in extreme cases. This not only affects the accuracy of test data and leads to test failures requiring retesting, but also poses a serious safety threat to test personnel and equipment. In particular, during high-speed stability tests or extreme handling tests, the movement of the counterweights can change the vehicle's center of gravity, directly affecting the vehicle's dynamic characteristics and rendering the test data unreliable.

[0004] Third, there is the problem of fixed mass specifications. Traditional counterweights are usually integral cast structures with a fixed mass for each counterweight. Common specifications include a few types such as 10kg, 20kg, and 25kg. When the total counterweight mass needs to be adjusted in the experiment, it can only be achieved by increasing or decreasing the number of counterweights. This results in limited precision in counterweight adjustment and makes it difficult to accurately match the mass value required by the experiment. For example, when a non-standard weight, such as 37kg, is required, it is difficult to achieve the required mass accurately using traditional counterweights. Only a close combination such as 20kg + 10kg + 10kg = 40kg can be selected, which introduces an error of 3kg and affects the accuracy of the test data.

[0005] Therefore, there is an urgent need to develop a modular, assembleable, easy-to-install and disassemble automotive test counterweight system with good stability and safety. This system should be able to provide a variety of standard quality specifications and be flexibly combined to achieve precise counterweighting. At the same time, it should be designed with reliable positioning and locking mechanisms to ensure that the counterweight remains stable during dynamic testing and avoids relative movement. Such a system should also have good versatility, adapt to the space requirements of different vehicle models, improve testing efficiency and safety, and reduce testing costs and manpower input. Utility Model Content

[0006] This utility model provides a modular, assemblable automotive test counterweight that solves the technical problems of poor stability, bulkiness, inflexibility, and poor versatility of existing counterweights. The technical solution is as follows: This utility model embodiment provides a modular, assembleable automotive test counterweight block, comprising: multiple basic counterweight blocks, The basic counterweight has a plurality of protrusions on at least one outer surface and a plurality of grooves on at least another outer surface. The plurality of basic counterweights are stably assembled by interlocking the protrusions and grooves. Each of the basic counterweights is provided with a limit locking structure, and multiple basic counterweights are locked together by the limit locking structure.

[0007] Optionally, the limiting and locking structure includes a positioning tongue and a slot. The positioning tongue is located on the side of the base counterweight, and the slot is provided on the side of the base counterweight opposite to the positioning tongue.

[0008] Optionally, the limiting locking structure further includes an automatic locking mechanism, which includes a locking member disposed on a basic counterweight block and a locking engagement part disposed on an adjacent basic counterweight block, the locking engagement part being connected to the slot.

[0009] Optionally, the locking element is a spring pin, and the locking engagement part is a locking hole that mates with the spring pin.

[0010] Optionally, the spring pin includes multiple cylindrical pins, multiple compression springs, and a manual release mechanism. The positioning tab is fixed to the base counterweight. The positioning tab has multiple horizontal through holes, and the base counterweight has a stepped hole. The two ends of the stepped hole are connected to the multiple horizontal through holes and the slot, respectively. The cylindrical pins are slidably installed in the horizontal through holes of the positioning tab. The compression springs are disposed in the horizontal through holes and push the cylindrical pins to extend outward toward the outside of the positioning tab. The manual release mechanism is installed in the stepped hole.

[0011] Optionally, the manual release mechanism includes a pull ring, multiple pull ropes, and a connecting spring. The connecting spring is disposed in a stepped hole and fixed to the pull ring. The multiple pull ropes are respectively connected to multiple cylindrical pins, and the other end of the multiple pull ropes is fixed to the pull ring.

[0012] Optionally, the locking element is a rotary latch, and the locking engagement part is a groove that engages with the rotary latch.

[0013] Optionally, the rotary latch includes a rotating shaft and multiple locking components. The basic counterweight has a rotating hole communicating with the slot. The rotating shaft is rotatably installed in the rotating hole. One end of the rotating shaft is fixed to a positioning tongue, and the outer surface of the positioning tongue is fixed to the multiple locking components. Optionally, the positioning tongue is shaped like a frustum cone, and the groove shape is adapted to the positioning tongue.

[0014] Optionally, the basic counterweight has a cuboid structure, and the overall standard weight specifications of the counterweight include 7 specifications, namely 1kg, 2kg, 5kg, 10kg, 15kg, 20kg and 25kg, and all specifications of the counterweight have the same external dimensions.

[0015] The beneficial effects of the technical solution provided by this utility model embodiment include at least the following: This invention achieves rapid assembly of counterweights through the combination of multiple protrusions, multiple grooves, and a limiting and locking structure. The cooperation of the protrusions and grooves provides stable support for vertical stacking, while the limiting and locking structure improves the connection stability between adjacent counterweights. Even when the vehicle is undergoing dynamic tests such as rapid acceleration, emergency braking, and high-speed turning, the counterweights will not move or separate relative to each other. This fundamentally eliminates the safety hazards of traditional counterweights easily slipping and scattering, ensuring the safety of test personnel and equipment, and ensuring the accuracy and repeatability of test data.

[0016] The positioning tongue and groove work together to provide double positioning, preventing misalignment between adjacent counterweights and improving the stability of multiple counterweights stacked vertically.

[0017] The automatic locking mechanism, through the cooperation of locking components and locking mating parts, can improve the vertical stability of the basic counterweight and is easy to install. It does not require other connecting tools and can be easily assembled by a single person. Compared with traditional counterweights that require the use of external fasteners such as straps and bolts and require two people to operate, with each counterweight taking more than 5 minutes to fix, the assembly efficiency of this utility model is increased by more than 80%, which greatly saves time and labor costs.

[0018] The positioning tongue and slot, similar to a dovetail structure, work together to guide the counterweight. Even if the vertical stacking is not precise enough, the counterweight can quickly find the correct position with the help of the positioning tongue and slot.

[0019] All counterweights adopt a uniform shape and connection structure, allowing for easy placement and assembly in vehicles ranging from small cars to large SUVs. They are compatible with the trunk and cargo space of various models, and seven mass specifications meet the counterweight requirements of most testing scenarios, eliminating the need for customized counterweights for different vehicle models or testing projects. For testing organizations, purchasing only one set of standard counterweights allows for flexible combinations to meet the needs of multiple vehicle models and testing projects, significantly reducing procurement costs and inventory pressure, and improving the utilization rate and return on investment of the counterweight system. Furthermore, the uniform specifications facilitate the numbering, classification, storage, and management of counterweights, reducing management costs and the probability of errors.

[0020] The modular structure makes each counterweight an independent unit. When a counterweight is damaged or worn, only that individual counterweight needs to be replaced, without replacing the entire counterweight system, thus reducing maintenance costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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.

[0022] Figure 1 This is a three-dimensional structural diagram of the counterweight block provided in Embodiment 1 of this utility model; Figure 2 This is a three-dimensional cross-sectional view of the counterweight block provided in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the counterweight installation provided in Embodiment 1 of this utility model; Figure 4 This is a three-dimensional structural diagram of the counterweight block provided in Embodiment 2 of this utility model; Figure 5 This is a three-dimensional cross-sectional view of the counterweight block provided in Embodiment 2 of this utility model; Figure 6 This is a schematic diagram of the counterweight installation provided in Embodiment 2 of this utility model.

[0023] In the diagram: 1-Basic counterweight; 11-Protrusion; 12-Groove; 13-Positioning tongue; 14-Slot; 15-Locking part; 16-Locking mating part; 17-Compression spring; 18-Rotating shaft; 19-Locking part; 151-Cylindrical pin; 152-Pull ring; 153-Pull rope; 154-Connecting spring. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0025] Figure 1 This is a three-dimensional structural diagram of the counterweight block provided in Embodiment 1 of this utility model; Figure 2 This is a three-dimensional cross-sectional view of the counterweight block provided in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the counterweight installation provided in Embodiment 1 of this utility model; Figure 4 This is a three-dimensional structural diagram of the counterweight block provided in Embodiment 2 of this utility model; Figure 5 This is a three-dimensional cross-sectional view of the counterweight block provided in Embodiment 2 of this utility model; Figure 6 This is a schematic diagram of the counterweight installation provided in Embodiment 2 of this utility model.

[0026] Example 1 like Figures 1 to 3 As shown, this utility model embodiment provides a modular, assembleable automotive test counterweight, aiming to solve the technical problems of poor stability, bulkiness, inflexibility, and poor versatility of existing counterweights. It includes: multiple basic counterweight blocks 1.

[0027] In this design, at least one outer surface of the basic counterweight 1 is provided with a plurality of protrusions 11, and at least another outer surface of the basic counterweight 1 is provided with a plurality of grooves 12. The plurality of basic counterweights 1 are stably assembled by inserting the protrusions 11 and the grooves 12. Each basic counterweight 1 is provided with a limit locking structure, and the plurality of basic counterweights 1 are locked together by the limit locking structure.

[0028] In this embodiment of the invention, at least one outer surface of the basic counterweight 1 is provided with a plurality of protrusions 11, and at least another outer surface of the basic counterweight 1 is provided with a plurality of grooves 12. Specifically, the protrusions 11 and grooves 12 cooperate to form a columnar structure similar to Lego bricks, and the grooves 12 are corresponding blind holes. This structure provides strong shear resistance and prevents lateral movement between the blocks after assembly. The multiple basic counterweights 1 are stably assembled by the insertion of the protrusions 11 and the grooves 12. For repeated positioning, if a protrusion 11 is provided on one side of the basic counterweight 1, then a groove 12 needs to be opened on the opposite side of the basic counterweight 1 located on the protrusion 11. Specifically, the basic counterweight 1 has a cuboid structure. If a protrusion 11 is provided on the left side of the basic counterweight 1, then a groove 12 needs to be opened on the right side of the basic counterweight 1. Both the protrusion 11 and the groove 12 are pre-designed and manufactured. In actual assembly, it is only necessary to align the protrusion 11 with the corresponding groove 12. Each basic counterweight 1 is provided with a limit locking structure, and multiple basic counterweights 1 are connected by the limit locking structure. The limiting and locking structure achieves locking. Specifically, the protrusion 11 and the groove 12 serve to position and prevent the basic counterweight 1 from misaligning with each other. The limiting and locking structure also prevents adjacent basic counterweight 1 from separating. Through the combined action of the protrusion, groove 12 and the limiting and locking structure, a tight connection is ensured between two adjacent basic counterweight 1. At the same time, the limiting and locking structure is relatively simple to unlock and lock. Compared with traditional counterweights that require the use of tools such as wrenches and screwdrivers and professional knowledge such as bolt tightening torque, the structure of this utility model can reduce training costs and the possibility of operational errors.

[0029] Optionally, the limiting and locking structure includes a positioning tongue 13 and a slot 14. The positioning tongue 13 is located on the side of the basic counterweight 1, and the slot 14 is provided on the side of the basic counterweight 1 opposite to the positioning tongue 13. For example, in this embodiment of the present invention, during installation, the positioning tongue 13 extends into the groove 14. The positioning tongue 13 and the groove 14 are mutually limited by the tight fit between the outer peripheral wall of the positioning tongue 13 and the inner side wall of the groove. The function of the positioning tongue 13 and the groove 14 is the same as that of the protrusion 11 and the groove 12, which is to prevent the misalignment of two adjacent basic counterweights 1. The direction of the misalignment of the two basic counterweights 1 is set as the X and Y directions, and the direction of the two basic counterweights 1 moving away from or closer to each other is the Z direction. Specifically, the positioning tongue 13 and the groove 14, as well as the protrusion 11 and the groove 12, limit the X and Y directions of the basic counterweights 1. This repetitive constraint is essentially a redundant design. In addition, the positioning tongue 13 and the groove 14 also play an auxiliary positioning role.

[0030] Optionally, the limiting locking structure also includes an automatic locking mechanism, which includes a locking member 15 disposed on a basic counterweight 1 and a locking engagement part 16 disposed on an adjacent basic counterweight 1, the locking engagement part 16 being connected to the slot 14. For example, in this embodiment of the present invention, when two basic counterweight blocks 1 are assembled in place, the locking member 15 and the locking engagement part 16 automatically achieve a locking connection. The orientation setting mode of the locking member 15 and the locking engagement part 16 is the same as the orientation setting mode of the protrusion 11 and the groove 12. Specifically, if the locking member 15 is set above the basic counterweight block 1, then the locking engagement part 16 is set below the basic counterweight block 1. During installation, it is only necessary to connect the ends of two adjacent counterweight blocks, and the locking member 15 and the locking engagement part 16 will lock each other. In addition, when the locking member 15 on one basic counterweight block 1 is connected to the locking engagement part 16 of another basic counterweight block 1, the Z direction of the two basic counterweight blocks 1 is also limited. At this time, the two basic counterweight blocks 1 are completely limited to each other, thereby ensuring their connection stability. When the two basic counterweight blocks 1 are assembled in place.

[0031] Optionally, the locking element 15 is a spring pin, and the locking mating part 16 is a locking hole that mates with the spring pin. Exemplarily, in this embodiment of the invention, during assembly, the spring pin springs into the locking hole under the action of the spring to lock two adjacent basic counterweight blocks 1 together. The spring pin automatically springs into the locking hole when the counterweight blocks are assembled in place, completing the locking connection. The entire process requires no manual intervention or tools, and a single person can easily complete the assembly operation.

[0032] Optionally, the spring pin includes multiple cylindrical pins 151, multiple compression springs 17, and a manual release mechanism. The positioning tongue 13 is fixed to the basic counterweight 1. When no external force is applied to the cylindrical pin 151 and the compression springs 17 are in equilibrium, a portion of the cylindrical pin 151 is located outside the horizontal through holes. The positioning tongue 13 has multiple horizontal through holes, and the basic counterweight 1 has stepped holes. The two ends of the stepped holes are connected to the multiple horizontal through holes and the slots 14, respectively. The purpose of connecting the stepped holes with the horizontal through holes is to... To ensure the smooth connection of the pull rope from the cylindrical pin 151 to the pull ring 152, the cylindrical pin 151 is slidably installed in the horizontal through hole of the positioning protrusion 13. The compression spring 17 is set in the horizontal through hole and pushes the cylindrical pin 151 outward toward the outside of the positioning protrusion 13. The two ends of the compression spring 17 are respectively connected to the inner wall of the horizontal through hole and the cylindrical pin 151. Although the side of the compression spring 17 is also in the horizontal through hole, it only contacts the inner wall of the horizontal through hole and plays an auxiliary guiding role. The manual release mechanism is installed in the stepped hole. For example, in this embodiment of the present invention, when no external force is applied to the manual release mechanism, under the sole action of the compression spring 17, a portion of the cylindrical pin 151 is located inside the horizontal through hole, and another portion is located outside the horizontal through hole. By partially overlapping the cylindrical pin 151 with the horizontal through hole, it can partially limit the cylindrical pin 151, and further transmit the limit to the cylindrical pin 151 and the locking hole. Moreover, the limiting direction of the cylindrical pin 151 is the same as the direction of separation of the two basic counterweights 1. Therefore, with the cooperation of the cylindrical pin 151 and the locking hole, it can be ensured that the two adjacent basic counterweights 1 are not easily separated.

[0033] Optionally, the manual release mechanism includes a pull ring 152, multiple pull ropes 153, and a connecting spring 154. The connecting spring 154 is disposed in the stepped hole and fixed to the pull ring 152. The multiple pull ropes 153 are respectively connected to multiple cylindrical pins 151, and the other end of the multiple pull ropes 153 is fixed to the pull ring 152. Exemplarily, in this embodiment of the present invention, when the pull ring 152 is pulled, the pull ring 152 transmits the pulling force to multiple cylindrical pins 151 simultaneously through multiple pull ropes 153, causing multiple cylindrical pins 151 to move into the horizontal through hole simultaneously until multiple cylindrical pins 151 are completely disengaged from the locking hole. At this time, the two adjacent counterweights 1 lose their mutual opposite directions and can be directly pulled apart. When the external force acting on the pull ring 152 disappears, the pull ring 152 returns to its original position under the action of the connecting spring 154. At this time, multiple cylindrical pins 151 move out of the horizontal through hole under the action of the compression spring 17 until a part of the cylindrical pin 151 extends out of the horizontal through hole. When the connecting spring 154 returns to its original length, the pull ring 152 is exactly located in the stepped hole. The pull ring 152 has a cylindrical structure with a gripper at one end. The cylindrical pull ring 152 can better fit the stepped hole and improve the stability of the pull ring 152.

[0034] Optionally, the positioning tongue 13 is shaped like a frustum of a cone, and the groove 14 is adapted to the shape of the positioning tongue 13. Exemplarily, in this embodiment of the invention, the frustum-shaped positioning tongue 13 can act as a guide when adjacent base counterweights 1 are installed. The tapered design of the positioning protrusion eliminates the need for precise alignment when stacked vertically; the counterweights can automatically find the correct position. Specifically, during installation, the part with the largest radius of the groove 14 first approaches the part with the smallest radius of the positioning tongue 13. This method increases the probability of the positioning tongue 13 matching the groove 14. As the positioning tongue 13 gradually moves into the groove 12, the radius of the groove 14 gradually decreases until installation is complete.

[0035] Optionally, the basic counterweight 1 has a cuboid structure, and the overall standard weight specifications of the counterweight include seven specifications: 1kg, 2kg, 5kg, 10kg, 15kg, 20kg, and 25kg. All specifications of the counterweight have the same external dimensions. Exemplarily, in this embodiment of the invention, the overall counterweight includes the basic counterweight 1, a protrusion 11, a positioning tongue 13, a locking element 15, and a locking mating part 16. The advantage of having multiple specifications of counterweights with the same external dimensions is that counterweights of any weight specification can be assembled together to achieve true modular combination. This design makes the counterweight combination method flexible and diverse. Users can freely choose different weight specifications of counterweights to combine according to experimental needs. For example, when a non-standard weight of 37KG is required, it can be combined and used. Option 1: 1 piece of 25kg + 1 piece of 10kg + 1 piece of 2kg = 37kg Option 2: 1 piece of 20kg + 1 piece of 15kg + 1 piece of 2kg = 37kg Option 3: 2 pieces of 15kg + 1 piece of 5kg + 1 piece of 2kg = 37kg Option 4: 3 x 10kg pieces + 1 x 5kg piece + 1 x 2kg piece = 37kg When a 47kg counterweight is required, it can be used in combination: Option 1: 1 piece of 25kg + 1 piece of 20kg + 1 piece of 2kg = 47kg Option 2: 2 x 20kg + 1 x 5kg + 1 x 2kg = 47kg By rationally selecting the quantity and combination of counterweights of different quality specifications, flexible and precise counterweight requirements can be met, effectively solving the problem of insufficient counterweight accuracy in existing technologies.

[0036] Example 2 like Figures 4 to 6Most of the structures in this embodiment are the same as those in Embodiment 1. The difference between this embodiment and Embodiment 1 lies in the different structures of the locking member 15 and the locking engagement part 16. Specifically, the locking member 15 is a rotary lock, and the locking engagement part 16 is a slot that engages with the rotary lock. For example, in this embodiment of the utility model, although the specific structures of the locking member 15 and the locking engagement part 16 are different, they serve the same purpose: to ensure the stable connection of adjacent basic counterweight blocks 1 in opposite directions. In use, simply rotating the rotary lock is sufficient to lock or unlock the locking member 15 and the locking engagement part 16.

[0037] Optionally, the rotary lock includes a rotating shaft 18 and multiple locking elements 19. The base counterweight 1 has a rotating hole communicating with the slot 14. The rotating shaft 18 is rotatably installed in the rotating hole. One end of the rotating shaft 18 is fixed to the positioning tongue 13. The outer surface of the positioning tongue 13 is fixed to the multiple locking elements 19. For example, in this embodiment of the present invention, when it is necessary to fix two adjacent basic counterweight blocks 1, it is only necessary to align the positioning tongue 13 with the slot 14 and the locking member 19 with the rotating hole. When the positioning tongue 13 extends into the slot 14, the locking member 19 also enters the rotating hole. At this time, it is only necessary to rotate the rotating shaft 18, and the rotating shaft 18 can rotate the positioning tongue 13, further driving the multiple locking members 19 on the positioning tongue 13 to rotate around the axis of the positioning tongue 13 as the rotation center, so as to lock the locking member 19 with the rotating hole. When it is necessary to unlock, it is only necessary to rotate the rotating shaft 18 in the opposite direction. The rotating shaft 18 is provided with a handrail, which is also located in the stepped hole.

[0038] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] The above description is only an optional 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 modular, assembleable automotive test counterweight, characterized in that, Includes multiple basic counterweights (1). The basic counterweight (1) has a plurality of protrusions (11) on at least one outer surface and a plurality of grooves (12) on at least another outer surface. The plurality of basic counterweights (1) are stably assembled by the insertion of the protrusions (11) and the grooves (12). Each of the basic counterweights (1) is provided with a limit locking structure, and multiple basic counterweights (1) are locked together by the limit locking structure.

2. The modular, assemblable automotive test counterweight according to claim 1, characterized in that, The limiting locking structure includes a positioning tongue (13) and a slot (14). The positioning tongue (13) is located on the side of the basic counterweight (1), and the slot (14) is provided on the side of the basic counterweight (1) opposite to the positioning tongue (13).

3. The modular, as-assembleable automotive test counterweight according to claim 2, characterized in that, The limiting locking structure also includes an automatic locking mechanism, which includes a locking member (15) disposed on a basic counterweight (1) and a locking engagement part (16) disposed on an adjacent basic counterweight (1), the locking engagement part (16) being connected to the slot (14).

4. The modular, as-assembleable automotive test counterweight according to claim 3, characterized in that, The locking element (15) is a spring pin, and the locking mating part (16) is a locking hole that mates with the spring pin.

5. A modular, assemblable automotive test counterweight according to claim 4, characterized in that, The spring pin includes multiple cylindrical pins (151), multiple compression springs (17) and a manual release mechanism. The positioning tongue (13) is fixed to the basic counterweight (1). Multiple horizontal through holes are provided on the positioning tongue (13). A stepped hole is provided on the basic counterweight (1). The two ends of the stepped hole are connected to the multiple horizontal through holes and the slot (14) respectively. The cylindrical pins (151) are slidably installed in the horizontal through holes of the positioning tongue (13). The compression springs (17) are set in the horizontal through holes and push the cylindrical pins (151) to extend outward toward the outside of the positioning tongue (13). The manual release mechanism is installed in the stepped hole.

6. A modular, assemblable automotive test counterweight according to claim 5, characterized in that, The manual release mechanism includes a pull ring (152), multiple pull ropes (153) and a connecting spring (154). The connecting spring (154) is disposed in the stepped hole and fixed to the pull ring (152). The multiple pull ropes (153) are respectively connected to multiple cylindrical pins (151), and the other end of the multiple pull ropes (153) is fixed to the pull ring (152).

7. A modular, assemblable automotive test counterweight according to claim 3, characterized in that, The locking element (15) is a rotary lock, and the locking mating part (16) is a slot that mates with the rotary lock.

8. A modular, assemblable automotive test counterweight according to claim 7, characterized in that, The rotary lock includes a rotating shaft (18) and multiple locking components (19). The base counterweight (1) has a rotating hole that communicates with the slot (14). The rotating shaft (18) is rotatably installed in the rotating hole. One end of the rotating shaft (18) is fixed to the positioning tongue (13). The outer surface of the positioning tongue (13) is fixed to the multiple locking components (19).

9. A modular, assemblable automotive test counterweight according to any one of claims 2 to 8, characterized in that, The positioning tongue (13) is shaped like a frustum cone, and the groove (14) is adapted to the shape of the positioning tongue (13).

10. A modular, assemblable automotive test counterweight according to any one of claims 1 to 8, characterized in that, The basic counterweight (1) has a cuboid structure. The standard weight specifications of the counterweight include 7 specifications, namely 1kg, 2kg, 5kg, 10kg, 15kg, 20kg and 25kg. All specifications of the counterweight have the same external dimensions.

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