Quick mounting device for weighing sensor of weighing hopper

Abstract

The invention discloses a quick mounting device for a weighing sensor of a weighing hopper. The quick mounting device comprises the weighing hopper and a supporting arm for supporting the weighing hopper, fixing lugs are symmetrically and fixedly connected to the two ends of the weighing hopper, an upper bottom plate is fixedly connected to the bottom ends of the fixing lugs through connecting bolts, multiple sets of adjusting pieces are arranged on the upper bottom plate in a penetrating mode, the adjusting pieces move downwards to move directionally along the limiting pieces, abut against the lower bottom plate and are used for supporting the upper bottom plate, and the adjusting pieces are in transmission connection with the limiting pieces to move to be separated from the supporting pieces. The adjusting part moves downwards and is used for supporting the weighing hopper fixedly connected with the upper bottom plate, so that the weighing hopper is kept in a horizontal state, the phenomenon that after the weighing hopper inclines, a weighing sensor installed on the other side is damaged due to uneven stress is avoided, and limiting grooves formed in the two ends of the supporting frame are matched with meshing blocks to be meshed and braked under the action of reset springs; the weighing sensor placed at the top end of the supporting frame is more convenient to install, and meanwhile the limiting groove is matched with the meshing block so that the weighing sensors of different height sizes can be adapted.

Description

Technical Field

[0001] This invention relates to the field of weighing sensor installation equipment technology, and in particular to a rapid installation device for a weighing hopper weighing sensor. Background Technology

[0002] As enterprises in my country's pharmaceutical, metallurgical, building materials, steel, chemical, and mining industries implement refined control of their processes, new process equipment and production lines are being built, and existing equipment is being equipped with metering and control units. This has led to a continuous expansion of the application of weighing sensors. At the same time, the requirements for simplifying the installation conditions and processes of weighing sensors are becoming increasingly stringent. In particular, during the renovation of existing equipment, high demands are being placed on the installation height of weighing units and the ease of installation and replacement. Currently, in the field of weighing technology, various types of weighing sensors are being used in weighing devices, and the installation accuracy of weighing sensors has a significant impact on the accuracy and stability of measurement results.

[0003] For example, the patent with publication number CN201828331U, entitled "A Device for Quickly Replacing a Weighing Sensor," and authorized announcement date of 20110511, includes a weighing sensor, an upper mounting plate, and a mounting frame. Its key feature is that the mounting frame has a U-shaped groove at its center, with two support columns symmetrically arranged along the center line on the left and right sides of the U-shaped groove. A U-shaped plate is located at the opening of the U-shaped groove and is fixed to the mounting frame by bolts. The mounting frame has symmetrical mounting holes at its four corners. The weighing sensor is placed in the U-shaped groove and fixed to the mounting frame by pins. The upper mounting plate has a recessed groove at its center that mates with the top of the weighing sensor. Symmetrical upper mounting through holes are located at the four corners of the upper mounting plate, and assembly holes are located at positions corresponding to the support columns. This utility model offers high weighing accuracy, low cost, simple structure, high safety, suitability for installation, and reliable operation in harsh environments.

[0004] The shortcomings of the existing technology are that, before replacement or adjustment, a jack must be used to lift and fix the part of the weighing bin used to install the sensor. A certain gap must be created between the weighing sensor and the mounting base before replacement or adjustment can be carried out. If further adjustment of the sensor position is required after the work is completed and the sensor is put back in place, it cannot be operated by a single person. If the weighing bin shifts during replacement or adjustment, the sensor located at the offset end will be damaged due to uneven force. Summary of the Invention

[0005] The purpose of this invention is to provide a quick installation device for a weighing hopper load cell. By adjusting the downward movement of the weighing hopper, which is fixed to the upper base plate, the weighing hopper is kept horizontal, thus preventing damage to the load cell installed on the other side due to uneven force after the weighing hopper tilts. The limiting grooves at both ends of the support frame, together with the biting blocks, engage and brake under the action of the return spring, making the installation of the load cell placed at the top of the support frame more convenient. At the same time, the limiting grooves and biting blocks can accommodate load cells of different heights and sizes.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a quick installation device for a weighing hopper load cell, comprising a weighing hopper and a support arm for supporting the weighing hopper; fixed ears are symmetrically fixed at both ends of the weighing hopper, and an upper base plate is fixed at the bottom end of the fixed ears by a connecting bolt; multiple sets of adjusting components are provided through the upper base plate, and the adjusting components move downward along the limiting component and abut against the lower base plate to support the upper base plate, and the limiting component moves and separates from the support component through a transmission connection, thereby realizing the sliding connection of the lower base plate with the support component to drive the load cell to separate from the fine-tuning component fixed to the upper base plate, so as to replace or adjust the separated load cell; the adjusting component includes a sleeve, a protruding strip is fixedly fixed on the outer side of the sleeve, a bolt rod is threadedly connected to the inner side of the sleeve, and threaded teeth are fixedly fixed inside the sleeve, and the threaded teeth are adapted to the threaded groove of the bolt rod; a rotating cap is fixedly fixed at the top end of the bolt rod through the upper base plate.

[0007] As a further description of the above technical solution:

[0008] A support column is fixed to the top of the bottom plate, a horizontal plate is fixed to the top of the support column, and a directional column is fixed to the bottom of the horizontal plate, with the directional column fixed to the support column.

[0009] As a further description of the above technical solution:

[0010] The horizontal plate is movably equipped with a reset component, which is located between two directional columns. One end of the reset component is movably connected to a stop roller, and the stop roller is properly fitted to the raised strip.

[0011] As a further description of the above technical solution:

[0012] The other end of the reset member is fixedly connected to a biting block, which is used to engage and lock the support member.

[0013] As a further description of the above technical solution:

[0014] The reset component includes a rectangular frame with an internal groove inside. A slider is slidably connected inside the internal groove, and the top of the slider is fixed to a horizontal plate.

[0015] As a further description of the above technical solution:

[0016] A sliding rod is provided through the slider, and a return spring is sleeved on the outside of the sliding rod, with both ends of the return spring fixed to the slider and the rectangular frame, respectively.

[0017] As a further description of the above technical solution:

[0018] The bottom plate is symmetrically provided with sliding grooves, and a support frame is slidably connected in the sliding grooves. The support frame is symmetrically provided with limit grooves at both ends, and the limit grooves are adapted to the brake teeth fixed to one end of the biting block.

[0019] As a further description of the above technical solution:

[0020] The top of the support frame has a placement slot for installing a weighing sensor. The bottom of the support frame is fixed to a support plate. The two ends of the support plate are symmetrically connected to limiting posts, which are fixed to the bottom plate.

[0021] As a further description of the above technical solution:

[0022] The bottom end of the support frame is provided with a support plate, and the support plate is sleeved on the limiting post. One end of the support plate is fixedly connected to a movable rod, and the top end of the movable rod is sleeved with a limiting sleeve, which is fixedly connected to the lower base plate and adapted to the guide groove opened in the lower base plate.

[0023] As a further description of the above technical solution:

[0024] The fine-tuning component includes a stop block, one end of which is fixedly connected to a connecting lug. The connecting lug is movably connected to an adjusting bolt. The end of the adjusting bolt away from the connecting lug is movably connected to a fixed seat. One end of the fixed seat is movably connected to an extension platform, and the extension platform is fixedly connected to the upper base plate.

[0025] This invention provides a quick installation device for a weighing hopper load cell, which has the following advantages:

[0026] In this invention, the weighing hopper, which is fixed to the upper base plate by the downward movement of the adjusting component, is kept horizontal. This prevents the weighing sensor installed on the other side from being damaged due to uneven force after the weighing hopper tilts. The limiting grooves at both ends of the support frame, together with the biting blocks, engage and brake under the action of the return spring, making the installation of the weighing sensor placed at the top of the support frame more convenient. At the same time, the limiting grooves and biting blocks can accommodate weighing sensors of different heights and sizes. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a quick installation device for a weighing hopper weighing sensor proposed in this invention;

[0028] Figure 2 This is a schematic diagram of the weighing hopper in this invention;

[0029] Figure 3 This is a schematic diagram of the structure of the weighing sensor in this invention;

[0030] Figure 4 This is a schematic diagram of the upper base plate in this invention;

[0031] Figure 5 This is a schematic diagram of the structure of the lower base plate in this invention;

[0032] Figure 6 This is a schematic diagram of the structure of the roller in this invention;

[0033] Figure 7 This is a schematic diagram of the rectangular frame structure in this invention;

[0034] Figure 8 This is a schematic diagram of the sleeve structure in this invention;

[0035] Figure 9 This is a cross-sectional view of the sleeve in this invention;

[0036] Figure 10 This is a schematic diagram of the structure of the pad block in this invention.

[0037] Legend: 1. Weighing hopper; 11. Fixing lug; 2. Support arm; 3. Upper base plate; 31. Connecting bolt; 32. Extension platform; 4. Adjusting component; 41. Sleeve; 411. Threaded tooth; 42. Bolt rod; 43. Rotating cap; 44. Raised strip; 5. Limiting component; 51. Support column; 52. Horizontal plate; 53. Orienting column; 54. Reset component; 541. Rectangular frame; 542. Internal groove; 543. Slider; 544. Slide rod; 54 5. Return spring; 55. Abutting roller; 56. Engaging block; 6. Support component; 61. Support frame; 62. Support plate; 63. Limiting post; 64. Support tray; 65. Movable rod; 66. Tension spring; 67. Limiting sleeve; 68. Placement groove; 69. Limiting groove; 7. Lower base plate; 71. Guide groove; 72. Slide groove; 8. Fine-tuning component; 81. Pad; 82. Connecting ear; 83. Adjusting bolt; 84. Fixing seat; 9. Weighing sensor. Detailed Implementation

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0039] Reference Figure 1-10A quick installation device for a weighing hopper load cell includes a weighing hopper 1 and a support arm 2 for supporting the weighing hopper 1. The weighing hopper 1 has symmetrically fixed ears 11 at both ends. The bottom of each fixed ear 11 is fixed to an upper base plate 3 via a connecting bolt 31. Multiple sets of adjusting members 4 are provided through the upper base plate 3. These adjusting members 4 move downwards along a limiting member 5 and abut against a lower base plate 7 to support the upper base plate 3. They also move through a transmission connection to separate from the supporting member 6, allowing the lower base plate 7 to slide. The supporting member 6 then drives the load cell 9 to separate from the fine-tuning assembly 8 fixed to the upper base plate 3, allowing for the replacement or adjustment of the separated load cell 9. The adjusting member 4 includes a sleeve 41 with a protruding strip 44 fixed to its outer side. A bolt rod 42 is threaded into the sleeve 41, and threaded teeth 411 are fixed inside the sleeve 41, matching the threaded groove of the bolt rod 42. A rotating cap 43 is fixed to the top of the bolt rod 42 through the upper base plate 3.

[0040] Specifically, the weighing hopper 1 is fixed to the upper base plate 3 by means of fixed ears 11 symmetrically welded at both ends and threaded connection with connecting bolts 31. The adjusting member 4, which passes through the upper base plate 3, is limited to the lower base plate 7 by the limiting member 5. A movable support member 6 is movably connected in the lower base plate 7. The weighing sensor 9 for measuring the weight of the weighing hopper 1 is placed at the top of the support member 6. When the rotating cap 43 in the adjusting member 4 is rotated, the rotating cap 43 drives the fixed bolt rod 42 to rotate. The sleeve 41 threaded to the bolt rod 42 is limited by the limiting member 5, and the sleeve 41 moves along the limiting member. The component 5 moves downward and abuts against the lower base plate 7. The protruding strip 44 fixed to the outer wall of the sleeve 41 abuts against the movement of the limiting component 5, causing the limiting component 5 to separate from the support component 6. After separation, the support component 6 is in a movable state and can slide up and down in the lower base plate 7. The weighing sensor placed at the top of the support component 6 can be replaced or adjusted. This device achieves the goal of adjusting the component 4 to move downward and support the weighing hopper 1 fixed to the upper base plate 3, so that the weighing hopper 1 remains in a horizontal state, avoiding the phenomenon that the weighing sensor installed on the other side is damaged due to uneven force after the weighing hopper 1 is tilted.

[0041] A support column 51 is fixedly connected to the top of the bottom plate 7. A horizontal plate 52 is fixedly connected to the top of the support column 51. A directional column 53 is fixedly connected to the bottom of the horizontal plate 52 and is fixedly connected to the support column 51. A reset member 54 is movably provided on the horizontal plate 52 and is located between the two directional columns 53. One end of the reset member 54 is movably connected to a roller 55 and fits snugly with the raised strip 44. The other end of the reset member 54 is fixedly connected to a biting block 56 and is used to bite and lock the support member 6. The reset member 54 includes a rectangular frame 541. An internal groove 542 is opened in the rectangular frame 541. A slider 543 is slidably connected in the internal groove 542 and is fixedly connected to the top of the slider 543 on the horizontal plate 52. A sliding rod 544 is passed through the slider 543 and a reset spring 545 is sleeved on the outside of the sliding rod 544. The two ends of the reset spring 545 are fixedly connected to the slider 543 and the rectangular frame 541, respectively.

[0042] Specifically, the lower base plate 7 has a rectangular structure. The support column 51 fixed on the lower base plate 7 supports the horizontal plate 52 at its top. The grooves at both ends of the sleeve 41 are adapted to the directional column 53. The directional column 53 limits the movement direction of the sleeve 41 through the grooves. When the protrusion 44 fixed at one end of the sleeve 41 abuts against the abutting roller 55, the abutting roller 55 drives the reset member 54 to move laterally. The engagement block 56 fixed on the reset member 54 separates from the limiting groove 69 in the support frame 61 of the support member 6 through the braking teeth. The reset spring 545 in the reset member 54 is stretched when the abutting roller 55 drives the rectangular frame 541 to move laterally along the slider 543. When the protrusion separates from the abutting roller 55... Subsequently, the elastic potential energy of the return spring 545 drives the braking teeth in the biting block 56 fixed to the rectangular frame 541 to engage with the limiting groove 69 opened in the support frame 61; so that the support frame 61 can be engaged and braked by the biting block 56 at any position, realizing that the biting block 56 automatically separates from the support frame 61 during the downward movement of the sleeve 41, and engages and brakes with the biting block 56 under the action of the return spring 545 through the limiting groove 69 opened at both ends of the support frame 61. This makes the installation of the weighing sensor 9 placed at the top of the support frame 61 more convenient. At the same time, the limiting groove 69 and the biting block 56 can adapt to weighing sensors 9 of different heights and sizes, improving the applicability of this device.

[0043] The lower base plate 7 is symmetrically provided with sliding grooves 72, and a support frame 61 is slidably connected in the sliding grooves 72. The support frame 61 is symmetrically provided with limiting grooves 69 at both ends, and the limiting grooves 69 are adapted to the brake teeth fixed to one end of the biting block 56. The top of the support frame 61 is provided with a placement groove 68, and the placement groove 68 is used to install the weighing sensor 9. The bottom of the support frame 61 is fixedly connected with a support plate 62, and the two ends of the support plate 62 are symmetrically provided with limiting posts 63, and the limiting posts 63 are fixedly connected to the lower base plate 7. The bottom of the support frame 61 is provided with a support plate 64, and the support plate 64 is sleeved on the limiting post 63. One end of the support plate 64 is fixedly connected with a movable rod 65, and the top of the movable rod 65 is sleeved with a limiting sleeve 67, and the limiting sleeve 67 is fixedly connected to the lower base plate 7 and is adapted to the guide groove 71 provided in the lower base plate 7.

[0044] Specifically, a support frame 61 is slidably connected within the symmetrically opened grooves 72 of the lower base plate 7. The support frame 61 is U-shaped and inverted within the grooves 72 of the lower base plate 7. A slot 68 is placed at the top of the support frame 61 for installing a weighing sensor 9. A support plate 62 fixed to the bottom of the support frame 61 is connected to a limiting post 63 that penetrates the circumference and is fixed to the lower base plate 7, allowing the support frame 61 to move up and down within the grooves 72 of the lower base plate 7. A support plate 64, movably connected to the limiting post 63 at the bottom of the support plate 62, holds the weighing sensor 9 installed on the support frame 61 fixed to the top of the support plate 62 under the action of a tension spring 66. The sensor rests against the pad 81 in the adjustment assembly. After the biting block 56 separates from the limiting groove 69 opened in the support frame 61, the support frame 61 needs to be pushed down manually. After the load cell replacement or adjustment is completed, the load cell is attached to the pad 81 under the action of the tension spring 66. No manual support is required. The reverse rotation of the bolt rod 42 drives the protrusion 44 fixed to the sleeve 41 to separate from the roller 55, so that the biting block 56 automatically bites and brakes the support frame 61, reducing the cumbersomeness of replacing or adjusting the load cell 9 and improving the efficiency of replacing or adjusting the load cell 9.

[0045] The fine-tuning component 8 includes a stop block, one end of which is fixedly connected to a connecting ear 82. The connecting ear 82 is movably connected to an adjusting bolt 83. The end of the adjusting bolt 83 away from the connecting ear 82 is movably connected to a fixed seat 84. One end of the fixed seat 84 is movably connected to an extension platform 32, and the extension platform 32 is fixedly connected to the upper base plate 3.

[0046] Specifically, the fixed seat 84, which is movably connected to the extension platform 32, drives the pad 81 to move through the adjusting bolt 83, so that the pad 81 can be extended or shortened. Furthermore, through the movable connection between the fixed seat 84 and the extension platform 32, the pad 81 can be finely adjusted at any position on the bottom of the upper base plate 3, thereby improving the flexibility of the device.

[0047] Working principle:

[0048] Installation process: First, rotate the bolt rod 42 to drive the sleeve 41 to move downward along the directional column 53, and place the bottom end of the sleeve 41 against the lower base plate 7. Then, connect the upper base plate 3 to the fixing ears 11 at both ends of the weighing hopper 1 by means of threaded connection of the connecting bolt 31. Then, rotate the bolt rod 42 in the opposite direction, and engage and brake the support frame 61 through the engagement block 56. The lower base plate 7 is fixed to the support arm 2 by bolts, and the installation is completed.

[0049] Sensor replacement or adjustment: When rotating the rotating cap 43 in the rotating adjusting component 4, the rotating cap 43 drives the fixed bolt rod 42 to rotate. The sleeve 41 connected to the bolt rod 42 is limited by the limiting component 5. The sleeve 41 moves downward along the limiting component 5 and abuts against the lower base plate 7. The grooves at both ends of the sleeve 41 are adapted to the directional post 53. The directional post 53 limits the movement direction of the sleeve 41 through the grooves. When the protruding strip 44 at one end of the sleeve 41 abuts against the abutting roller 55, the abutting roller 55 drives the reset component 54 to move laterally. The biting block 56 in the reset component 54 separates from the limiting groove 69 in the support frame 61 through its self-welded braking teeth. The reset spring 545 in the reset component 54 is stretched when the abutting roller 55 drives the rectangular frame 541 to move laterally along the slider 543. The reset spring 545 stores energy during the rope pulling process. After separation, the support component 6 is in a movable state and can slide up and down in the lower base plate 7. The bottom end of the support frame 61 supports... Plate 62, through a limiting post 63 that penetrates the circumference and is fixed to the lower base plate 7, allows the support frame 61 to move up and down within the sliding groove 72 of the lower base plate 7. The support plate 64, which is movably connected to the limiting post 63 at the bottom of the support plate 62, presses the load cell 9 installed on the support frame 61, which is fixed to the top of the support plate 62, against the pad 81 in the adjustment assembly under the action of the tension spring 66. After the engagement block 56 separates from the limiting groove 69 opened in the support frame 61, the support frame 61 needs to be pushed down manually. After the load cell 9 is replaced or adjusted, the load cell is attached to the pad 81 under the action of the tension spring 66, without the need for manual support of the load cell 9. Finally, the bolt rod 42 is rotated in the opposite direction, separating from the roller 55 through the protrusion 44. The elastic potential energy of the return spring 545 drives the engagement block 56 and its own welded brake teeth to engage and brake with the limiting groove 69 in the support frame 61, thus completing the replacement or adjustment of the load cell 9.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A quick installation device for a weighing hopper load cell, characterized in that, It includes a weighing hopper (1) and a support arm (2) for supporting the weighing hopper (1). The weighing hopper (1) has fixed ears (11) symmetrically fixed at both ends. The bottom of the fixed ears (11) is fixed to the upper base plate (3) through the connecting bolt (31). The upper base plate (3) is provided with multiple sets of adjusting parts (4). The adjusting parts (4) move down along the limiting part (5) and abut against the lower base plate (7) to support the upper base plate (3). The limiting part (5) moves through the transmission connection and separates from the support part (6). The support part (6) that is slidably connected to the lower base plate (7) drives the weighing sensor (9) to separate from the fine adjustment component (8) fixed on the upper base plate (3). The separated weighing sensor (9) can be replaced or adjusted. The adjusting component (4) includes a sleeve (41), a protruding strip (44) is fixedly connected to the outside of the sleeve (41), a bolt rod (42) is threadedly connected inside the sleeve (41), a threaded tooth (411) is fixedly connected inside the sleeve (41), and the threaded tooth (411) is adapted to the threaded groove opened on the bolt rod (42), and a rotating cap (43) is fixedly connected to the top of the bolt rod (42) through the upper base plate (3).

2. The quick installation device for a weighing hopper load cell according to claim 1, characterized in that, The bottom plate (7) is fixed to the top of a support column (51), the top of the support column (51) is fixed to a horizontal plate (52), the bottom of the horizontal plate (52) is fixed to a directional column (53), and the directional column (53) is fixed to the support column (51).

3. The quick installation device for a weighing hopper load cell according to claim 2, characterized in that, The horizontal plate (52) is movably provided with a reset member (54), and the reset member (54) is located between two directional columns (53). One end of the reset member (54) is movably connected to a roller (55), and the roller (55) is properly fitted to the protruding strip (44).

4. The quick installation device for a weighing hopper load cell according to claim 3, characterized in that, The other end of the reset member (54) is fixedly connected to a biting block (56), and the biting block (56) is used to bite the locking support member (6).

5. A quick installation device for a weighing hopper load cell according to claim 3, characterized in that, The reset component (54) includes a rectangular frame (541), and an internal groove (542) is provided in the rectangular frame (541). A slider (543) is slidably connected in the internal groove (542), and the top of the slider (543) is fixed to the horizontal plate (52).

6. A quick installation device for a weighing hopper load cell according to claim 5, characterized in that, A sliding rod (544) is provided through the slider (543), and a return spring (545) is sleeved on the outside of the sliding rod (544). The two ends of the return spring (545) are respectively fixed to the slider (543) and the rectangular frame (541).

7. The quick installation device for a weighing hopper load cell according to claim 1, characterized in that, The lower base plate (7) is symmetrically provided with a sliding groove (72), and a support frame (61) is slidably connected in the sliding groove (72). The support frame (61) is symmetrically provided with limit grooves (69) at both ends, and the limit grooves (69) are adapted to the brake teeth fixed at one end of the biting block (56).

8. A quick installation device for a weighing hopper load cell according to claim 7, characterized in that, The top of the support frame (61) is provided with a placement groove (68), and the placement groove (68) is used to install a weighing sensor (9). The bottom of the support frame (61) is fixedly connected to a support plate (62). The two ends of the support plate (62) are symmetrically provided with limiting posts (63), and the limiting posts (63) are fixedly connected to the bottom plate (7).

9. A quick installation device for a weighing hopper load cell according to claim 1, characterized in that, The bottom end of the support frame (61) is provided with a support plate (64), and the support plate (64) is sleeved on the limiting post (63). One end of the support plate (64) is fixedly connected to a movable rod (65), and the top end of the movable rod (65) is sleeved with a limiting sleeve (67), and the limiting sleeve (67) is fixedly connected to the lower base plate (7) and is adapted to the guide groove (71) opened on the lower base plate (7).

10. A quick installation device for a weighing hopper load cell according to claim 1, characterized in that, The fine-tuning component (8) includes a stop block, one end of which is fixedly connected to a connecting ear (82), the connecting ear (82) is movably connected to an adjusting bolt (83), the end of the adjusting bolt (83) away from the connecting ear (82) is movably connected to a fixed seat (84), one end of the fixed seat (84) is movably connected to an extension platform (32), and the extension platform (32) is fixedly connected to the upper base plate (3).

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