An adjustable backplate mechanism for VPX enclosures

Abstract

This invention discloses an adjustable backplate mechanism for VPX module housings, comprising a support frame with guide grooves and a backplate; a backplate adjustment assembly including an adjustment frame slidably connected to the support frame, the adjustment frame having a first end face and a second end face opposite to each other; a guide rail corresponding to the guide groove on the adjustment frame; a locking device detachably mounted on the first end face of the adjustment frame; a transmission belt mounted on the second end face of the adjustment frame; multiple fixed pulleys mounted on the periphery of the second end face, the transmission belt being connected to the adjustment frame via the fixed pulleys; an adjuster and a driver mounted on the top of the adjustment frame and respectively connected to the transmission belt; the positions of the adjuster and driver relative to the top of the adjustment frame are vertically adjustable. The backplate is installed via the backplate adjustment assembly, allowing for left-right adjustment of the backplate, enabling precise insertion and removal of the module, and avoiding interference during insertion and removal or deformation during locking of the module due to machining errors in the parts.

Description

Technical Field

[0001] This invention belongs to the field of VPX enclosure technology, specifically relating to an adjustable backplate mechanism for VPX enclosures. Background Technology

[0002] Modern VPX chassis come in a wide variety of models and have diverse functions. However, due to the large number and complex shapes of the internal components, coupled with the limited space inside the chassis, the installation accuracy of the chassis plug-in modules has become a challenge.

[0003] Patent application number CN202211287763.X discloses an adaptive high-precision VPX chassis, and discloses that a front crossbeam is installed at the front of the chassis base, and a front IO plug is inserted on the front crossbeam. The front IO plug is fixed to the front crossbeam by a assisted pull plug. A VPX backplate is fixed at the rear of the front crossbeam. A positioning block is fixed on the side of the VPX backplate away from the front crossbeam. One end of the positioning block is fixedly connected to the VPX backplate, and the other end of the positioning block is fixedly connected to the rear crossbeam. The rear crossbeam is installed at the rear of the chassis base, and a rear IO plug is inserted on the rear crossbeam. The rear IO plug is fixed to the rear crossbeam by a assisted pull plug.

[0004] As shown in the attached drawings of the VPX chassis in the aforementioned patent, the VPX backplate is installed between the front and rear I / O modules. One end is connected to the I / O module via a front crossbeam, and the other end is connected to the rear I / O module via a positioning block, thus addressing the issue of module mating precision. In this patent, the position of the VPX backplate is fixed after it is connected to the front and rear I / O modules. Although high-precision machining ensures the mating distance between the front and rear I / O modules, the machining precision requirements for all related parts within the chassis are extremely high. However, if the machining precision of any part is substandard, it may lead to interference during module insertion and removal or deformation during module locking. Summary of the Invention

[0005] To address the aforementioned problems, this invention aims to provide an adjustable backplane mechanism for VPX chassis to solve the issue of poor installation accuracy of VPX chassis plug-in modules.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An adjustable backplate mechanism for a VPX enclosure includes a support frame with guide grooves and a backplate.

[0008] The back panel adjustment assembly includes an adjustment frame that is slidably connected to a support frame, the adjustment frame having a first end face and a second end face that are disposed opposite to each other; a guide rail that is disposed on the adjustment frame corresponding to the guide groove is provided;

[0009] The locking device is detachably mounted on the first end face of the adjustment frame;

[0010] A transmission belt is located on the second end face of the adjusting frame; multiple fixed pulleys are provided on the periphery of the second end face, and the transmission belt is connected to the adjusting frame through the fixed pulleys.

[0011] An adjuster and a driver are located at the top of the adjustment frame and are respectively connected to the transmission belt; the positions of the adjuster and the driver relative to the top of the adjustment frame are adjustable vertically.

[0012] The locking device is located near the top of the adjustment frame; it includes a locking seat that is detachably connected to the adjustment frame, a screw rod located inside the locking seat, and locking blocks one and two located at both ends of the screw rod.

[0013] Square grooves for locking and guiding the first and second locking blocks are provided at both ends of the lock seat along its length, and elongated grooves for guiding and limiting the screw; each square groove is provided with a first inclined surface.

[0014] One end of the screw is fitted into the first locking block; the other end is connected to the second locking block by a thread; the first locking block and the second locking block are respectively provided with a second inclined surface that fits against the first inclined surface.

[0015] A first guide groove for mounting the adjuster and a second guide groove for mounting the driver are provided at the top of the adjustment frame; the first guide groove is located at the center of the top of the adjustment frame; the second guide groove is symmetrically located on both sides of the first guide groove.

[0016] The adjuster includes an adjusting seat detachably connected to the first guide groove, an adjusting pin perpendicularly connected to the adjusting seat, an adjusting wheel connected to one end of the adjusting pin, a retaining ring disposed on the adjusting pin and connected to the adjusting seat, and a set screw for fastening the adjusting wheel; the adjusting wheel is disposed outside the first guide groove and connected to the transmission belt.

[0017] The driver includes a wheel seat detachably connected to the second guide groove, and a friction wheel threadedly connected to the wheel seat; the friction wheel is located outside the second guide groove and connected to the transmission belt.

[0018] A pressure roller connected to the transmission belt is also provided on the second end face of the adjustment frame; the pressure rollers are arranged in pairs and are respectively located on both sides of the adjuster and the driver.

[0019] The fixed pulleys are respectively located at the four corners of the adjustment frame and at the bottom center.

[0020] The adjustment frame has multiple mounting holes for installing positioning pins.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The present invention provides an adjustable backplate mechanism for VPX plug-in boxes. The backplate is installed via a backplate adjustment assembly, which allows the backplate to be adjusted in the left and right directions, enabling precise insertion and removal of plug-in modules. This avoids interference during insertion and removal of plug-in modules or deformation during locking caused by part machining errors. The backplate adjustment assembly also has a quick locking function. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of an adjustable backplate mechanism for a VPX enclosure according to the present invention.

[0025] Figure 2 This is an exploded view of an adjustable backplate mechanism for a VPX enclosure according to the present invention.

[0026] Figure 3 This is a schematic diagram of the structure of the first end face of the backplate adjustment assembly in this invention;

[0027] Figure 4 This is a schematic diagram of the second end face of the backplate adjustment assembly in this invention;

[0028] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0029] Figure 6 for Figure 4 Enlarged view of point B in the middle;

[0030] Figure 7 This is an exploded view of the backplate adjustment assembly in this invention;

[0031] Figure 8 This is a schematic diagram of the adjustment frame in this invention;

[0032] Figure 9 for Figure 8 Enlarged view of point C in the middle;

[0033] Figure 10 This is a schematic diagram of the locking device in this invention;

[0034] Figure 11 This is a schematic diagram of the lock seat at one angle in this invention;

[0035] Figure 12 This is a schematic diagram of the lock seat from another angle in this invention;

[0036] Figure 13 This is a schematic diagram of the screw structure in this invention;

[0037] Figure 14 This is a schematic diagram of the structure of the locking block one in this invention;

[0038] Figure 15 This is a schematic diagram of the structure of the second locking block in this invention;

[0039] Figure 16 This is a schematic diagram of the adjuster in this invention;

[0040] Figure 17 This is a schematic diagram of the adjusting wheel in this invention;

[0041] Figure 18 This is a schematic diagram of the adjusting pin in this invention;

[0042] Figure 19 This is a schematic diagram of the driver structure in this invention;

[0043] Figure 20 This is a schematic diagram of the fixed pulley in this invention;

[0044] Figure 21 This is a schematic diagram of the pressure wheel in this invention;

[0045] Figure 22 This is a schematic diagram of the conveyor belt structure in this invention;

[0046] Figure 23 This is a schematic diagram of the positioning pin in this invention;

[0047] Figure 24 This is a schematic diagram of the structure of the support frame in this invention;

[0048] Figure 25 for Figure 24 Enlarged view of point D in the middle;

[0049] Reference numerals: 1-Adjusting frame, 101-First end face, 102-Second end face, 103-Guide rail, 104-First guide groove, 105-Second guide groove, 106-Positioning pin, 107-Mounting hole, 2-Locking device, 21-Locking seat, 211-Square groove, 212-Oblong groove, 22-Screw, 23-Locking block one, 24-Locking block two, 3-Transmission belt, 4-Fixed pulley, 5-Adjuster, 51-Adjusting seat, 52-Adjusting pin, 53-Adjusting wheel, 54-Retaining ring, 55-Setting screw, 6-Driver, 61-Wheel seat, 62-Friction wheel, 7-First inclined surface, 8-Second inclined surface, 9-Pressure wheel, 10-Bearing frame, 11-Guide groove, 12-Back plate. Detailed Implementation

[0050] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments. All modifications, substitutions and alterations made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0051] Combined with reference Figures 1 to 25 An adjustable backplate mechanism for a VPX plug-in box according to the present invention includes a support frame 10, on which a guide groove 11 and a backplate 12 are provided;

[0052] The back panel adjustment assembly includes an adjustment frame 1 that is slidably connected to the support frame 10. The adjustment frame 1 has a first end face 101 and a second end face 102 that are disposed opposite to each other. A guide rail 103 corresponding to the guide groove 11 is provided on the adjustment frame 1.

[0053] The locking device 2 is detachably mounted on the first end face 101 of the adjusting frame 1;

[0054] A transmission belt 3 is disposed on the second end face 102 of the adjustment frame 1; a plurality of fixed pulleys 4 are disposed on the periphery of the second end face 102, and the transmission belt 3 is connected to the adjustment frame 1 through the fixed pulleys 4.

[0055] Adjuster 5 and driver 6 are located at the top of adjustment frame 1 and are respectively connected to transmission belt 3; the positions of adjuster 5 and driver 6 relative to the top of adjustment frame 1 are adjustable up and down.

[0056] An adjustable backplate mechanism for VPX insert boxes in this invention includes a backplate 12 mounted on a support frame 10. The guide groove 11 on the support frame 10 engages with the guide rail 103 in the backplate adjustment assembly. A transmission system is formed by the cooperation of the adjuster 5, the driver 6, and the transmission belt 3, which enables the support frame to move the backplate left and right as needed.

[0057] Specifically, the adjustable back panel assembly includes a support frame 10, which is a rectangular frame structure. A guide groove 11 is provided on each of the opposite sides of the support frame 10; that is, a guide groove 11 is provided at the top and bottom of the support frame 10, and the guide groove 11 is arranged along the length direction of the support frame 10. In this embodiment, the cross-section of the guide groove 11 is V-shaped.

[0058] The back plate 12 is disposed on the support frame 10, and the back plate 12 and the support frame 10 are detachably connected by screws.

[0059] The backplate adjustment assembly, slidably connected to the support frame 10, includes an adjustment frame 1, a locking device 2, a transmission belt 3, an adjuster 5, and a driver 6. Specifically, the adjustment frame 1 is a rectangular frame; the adjustment frame 1 has a first end face 101 and a second end face 102 arranged opposite to each other. The adjustment frame 1 is CNC machined from aluminum alloy plate.

[0060] A guide rail 103 is provided at the top and bottom of the adjustment frame 1, and the guide rail 103 is correspondingly provided with the guide groove 11. The guide rail 103 is V-shaped and is provided along the length direction of the adjustment frame 1, and the guide rail 103 at the top and bottom of the adjustment frame 1 is provided opposite to each other.

[0061] Multiple mounting holes 107 for installing positioning pins 106 are provided on the adjustment frame 1. Specifically, the mounting holes 107 are located at the bottom of the adjustment frame 1. In this embodiment, there are nine mounting holes 107, evenly distributed along the length of the bottom of the adjustment frame. Each mounting hole 107 corresponds to a positioning pin 106, and the positioning pin 106 is connected to the mounting hole 107 by its tail thread. The positioning pin 106 is used for the installation and positioning of the back plate adjustment assembly in the front insertion box, and is made of stainless steel. Its tail thread is inserted into the mounting hole 107 at the bottom of the adjustment frame 1. The four sides of the pin are milled flat for clamping and turning with a wrench during installation.

[0062] The locking device 2 is detachably disposed on the first end face 101 of the adjustment frame 1 and is used for locking the adjustable back plate mechanism in the front insertion box. In this embodiment, the locking device 2 is configured as two pieces, disposed on the top of the first end face 101, and the two locking devices 2 are disposed along the length direction of the adjustment frame 1 and on the same straight line.

[0063] The locking device 2 includes a locking seat 21 detachably connected to the adjusting frame 1, a screw 22 disposed within the locking seat 21, and locking blocks 23 and 24 disposed at both ends of the screw 22. Specifically, multiple combination holes are provided along the length of the locking seat 21, and the locking seat 21 is fixed to the adjusting frame 1 by first countersunk screws passing through the combination holes. The locking seat 21 is CNC machined from aluminum alloy plate.

[0064] Square grooves 211 for locking and guiding the locking blocks 23 and 24 are provided at both ends of the length direction of the lock base 21; that is, two square grooves 211 are provided on one lock base 21. After the two ends of the screw 22 are connected to the locking blocks 23 and 24 respectively, they are installed in the square grooves 211. Each square groove 211 has a first inclined surface 7 in the length direction. In this embodiment, the inclination angle of the first inclined surface 7 is 15°, and the inclination direction is towards both ends of the lock base 21.

[0065] The lock seat 21 is also provided with an elongated groove 212 for guiding and limiting the screw 22.

[0066] One end of the screw 22 is fitted into the locking block 23 to achieve axial guidance; the other end is connected to the locking block 24 via a thread to form a threaded transmission, thereby realizing the locking and unlocking of the locking device 2; the screw 22 is made of stainless steel rod; a cross groove is provided at one end of it, so that it can be turned with an ordinary screwdriver.

[0067] A second inclined surface 8 is provided on the first inclined surface 7 on the first inclined surface 23 and the second inclined surface 24 respectively. The second inclined surface 8 is inclined at 15°. The locking guide is achieved by the cooperation of the first inclined surface 7 and the second inclined surface 8.

[0068] In this embodiment, both the first locking block 23 and the second locking block 24 are CNC machined from aluminum alloy plates.

[0069] The transmission belt 3 is located on the second end face 102 of the adjustment frame 1; multiple fixed pulleys 4 are provided on the periphery of the second end face 102, and the transmission belt 3 is connected to the adjustment frame 1 through the fixed pulleys 4.

[0070] Specifically, in this embodiment, there are five fixed pulleys 4, four of which are located at the four corners of the adjustment frame 1 and the other is located at the bottom center of the adjustment frame 1; the fixed pulleys 4 are installed on the second end face 102 of the adjustment frame 1 by means of their own screws; the transmission belt 3 is connected to the five fixed pulleys 4.

[0071] Adjuster 5 and driver 6 are located at the top of adjustment frame 1 and are respectively connected to transmission belt 3; the positions of adjuster 5 and driver 6 relative to the top of adjustment frame 1 are adjustable up and down.

[0072] Specifically, a first guide groove 104 for mounting the adjuster 5 and a second guide groove 105 for mounting the driver 6 are provided on the top of the adjustment frame 1. The first guide groove 104 is located at the center of the top of the adjustment frame 1 and is connected to the first end face 101 and the second end face 102 of the adjustment frame 1. The second guide grooves 105 are symmetrically arranged on both sides of the first guide groove 104, that is, there are two second guide grooves 105, and they are connected to the second end face 102 of the adjustment frame 1.

[0073] The adjuster 5 includes an adjusting seat 51 detachably connected to the first guide groove 104. Specifically, a first countersunk hole is provided at the corresponding position of the adjusting seat 51 and the first guide groove 104. The adjusting seat 51 is installed in the first guide groove 104 by a second countersunk screw passing through the first countersunk hole. The adjusting seat 51 is CNC machined from aluminum alloy plate.

[0074] An adjusting pin 52 is provided inside the adjusting seat 51; the adjusting pin 52 is perpendicular to the adjusting seat 51. Specifically, the adjusting pin 52 passes through the first end face 101 of the adjusting frame 1 into the adjusting seat 51 and exits through the second end face 102 of the adjusting frame 1. An adjusting wheel 53 is connected to the adjusting pin 52 located at one end of the second end face 102, and the adjusting wheel 53 is connected to the transmission belt 3. A set screw 55 for fastening the adjusting wheel 53 is provided on the adjusting wheel 53.

[0075] A retaining ring 54 is also provided on the adjusting pin 52. The retaining ring 54 is connected to the adjusting seat 51 and is located near the end where the adjusting wheel 53 is located.

[0076] The adjustment device 5 provides a power source for the back panel adjustment assembly; turning the adjustment pin 52 causes the adjustment wheel 53 to drive the transmission system, thereby achieving displacement of the back panel in the left and right directions.

[0077] The adjusting wheel 53 is made of stainless steel and fits into the tail of the adjusting pin 52, and is locked with the set screw 55. During operation, the outer diameter of the adjusting wheel 53 is in close contact with the transmission belt 3, and under the action of the turning force of the adjusting pin 52, it drives the transmission belt 3 to achieve the adjustment function.

[0078] The adjusting pin 52 is made of stainless steel bar; the middle section of the shaft is installed in the adjusting seat 51, the tail section of the shaft fits into the adjusting wheel 53, and the head is provided with an internal hexagon countersunk hole to facilitate the turning of the turning tool.

[0079] Two actuators 6 are provided, each actuator 6 including a wheel seat 61 detachably connected to the second guide groove 105. Specifically, a second countersunk hole is provided at the corresponding position of the wheel seat 61 and the second guide groove 105, and the wheel seat 61 is installed in the second guide groove 105 by a third countersunk screw passing through the second countersunk hole. The wheel seat 61 is CNC machined from aluminum alloy plate.

[0080] A friction wheel 62 is threadedly connected to one end of the wheel seat 61. The friction wheel 62 is located outside the second guide groove 105, on the second end face 102, and connected to the transmission belt 3. Through the positive or negative torque transmitted by the transmission belt 3, the friction wheel 62 drives the bearing frame to move to the left or right, thereby adjusting the left and right positions of the back plate.

[0081] The hub surface of friction wheel 62 is made of silicone rubber, with a built-in sliding bearing. The end of the spindle has a cross screwdriver slot, and the tail of the spindle has an installation thread.

[0082] A pressure roller 9 connected to the transmission belt 3 is also provided on the second end face 102 of the adjusting frame 1; the pressure rollers 9 are arranged in pairs and are respectively located on both sides of the adjuster 5 and the driver 6. Specifically, a set of pressure rollers 9 is provided on both sides of the friction wheel 62 and the adjusting wheel 53, and the pressure rollers 9 are connected to the adjusting frame 1 through their own screws and are connected to the transmission belt 3.

[0083] In this invention, when the transmission belt 3 is fitted onto the fixed pulley 4, adjusting wheel 53, and friction wheel 62, the tension is moderate, leaving adjustment allowance. The clamping wheel 9 is used to clamp the transmission belt 3, ensuring that the transmission belt 3 maintains close contact with the adjusting wheel 53 and friction wheel 62. The clamping wheel 9 has a built-in sliding bearing, a cross-head screwdriver groove at the end of the spindle, and an installation thread at the tail end of the spindle.

[0084] An exploded view of an adjustable backplate mechanism for a VPX enclosure according to the present invention is shown below. Figure 2 As shown, the assembly process is as follows:

[0085] First, install the back plate adjustment assembly. Specifically, install five fixed pulleys 4 on the second end face 102 of the adjustment frame 1; wrap the transmission belt 3 around the fixed pulleys 4, with the fixed pulleys 4 at the four corners of the adjustment frame 1 placed inside the transmission belt 3, and the fixed pulleys 4 at the bottom of the adjustment frame 1 placed outside the transmission belt 3.

[0086] The clamping rollers 9 are respectively installed on the second end face 102 of the adjusting frame 1; the clamping rollers 9 are all placed on the outside of the transmission belt 3.

[0087] Fix the two drivers 6 into the second guide groove 105 with the third countersunk screws. The friction wheel 62 should be placed inside the transmission belt 3. The third countersunk screws should not be tightened at this time to ensure that they do not fall off, and that the top surface of the driver 6 is basically flush with the top surface of the adjustment frame 1.

[0088] The adjuster 5 is fixed in the first guide groove 104 by the second countersunk screw, and the adjusting wheel 53 needs to be placed outside the transmission belt 3; the second countersunk screw should not be tightened at this time, just enough to ensure that the second countersunk screw does not fall off and that the top surface of the adjuster 5 is basically flush with the top surface of the adjusting frame 1.

[0089] Install the two locking devices 2 onto the first end face 101 of the adjusting frame 1 using the first countersunk screw. During installation, first remove the locking block 23, locking block 24, and screw 22 from the locking device 2. After the lock seat 21 is installed, connect the locking block 23, locking block 24, and screw 22 to the lock seat 21, and then install them into the lock seat 21. At this time, the locking device 2 must be kept in the unlocked state. Install the nine positioning pins 106 into the bottom mounting of the adjusting frame 1 and tighten all the positioning pins 106. Then, fasten the guide groove 11 of the support frame 10 with the guide rail 103 of the back plate adjusting assembly to ensure that the relative positions of the adjusting frame 1 and the support frame 10 are centered.

[0090] Tighten the third countersunk screw of the driver 6 to ensure that the outer cylindrical surface of the friction wheel 62 is in close contact with the top drive surface of the support frame 10. Tighten the second countersunk screw of the adjuster 5 to ensure that the outer cylindrical surface of the adjusting wheel 53 is in close contact with the outer side of the transmission belt 3, and that the outer cylindrical surface of the friction wheel 62 is in close contact with the inner side of the transmission belt 3, ensuring that the transmission belt 3 is in a taut state.

[0091] Turn the adjusting pin 52 in the adjuster 5 clockwise and counterclockwise respectively. Check if the adjusting wheel 53, friction wheel 62, pressure wheel 9, and fixed pulley 4 rotate freely. If there is any jamming, the corresponding parts need to be replaced. Check if the adjusting wheel 53, transmission belt 3, and friction wheel 62 are transmitting power normally, and if the left and right displacement of the bearing frame 10 is smooth. If there is any abnormality, adjust the third countersunk screw of the driver 6 until it is normal. Check if the transmission belt 3 is slipping. If it is slipping, turn the second countersunk screw of the adjuster 5 until it is normal. Finally, install the back plate 12 onto the bearing frame 10 with screws.

[0092] This adjustable backplane mechanism can serve as a universal module for use in VPX chassis of the same specifications but different models and functions. It utilizes backplane adjustment component technology to achieve precise installation of VPX chassis plug-in modules.

[0093] The above provides a detailed description of an adjustable backplane mechanism for a VPX enclosure provided by the present invention. Specific examples have been used to illustrate the structure and working principle of the invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An adjustable backplate mechanism for a VPX enclosure, characterized in that: It includes a support frame (10), on which a guide groove (11) and a back plate (12) are provided; The back panel adjustment assembly includes an adjustment frame (1) that is slidably connected to the support frame (10). The adjustment frame (1) has a first end face (101) and a second end face (102) that are disposed opposite to each other. A guide rail (103) corresponding to the guide groove (11) is provided on the adjustment frame (1). The locking device (2) is detachably mounted on the first end face (101) of the adjusting frame (1); A transmission belt (3) is provided on the second end face (102) of the adjustment frame (1); multiple fixed pulleys (4) are provided on the periphery of the second end face (102), and the transmission belt (3) is connected to the adjustment frame (1) through the fixed pulleys (4); Adjuster (5) and driver (6) are located at the top of adjustment frame (1) and are respectively connected to transmission belt (3); the positions of the adjuster (5) and driver (6) relative to the top of adjustment frame (1) are adjustable up and down; The locking device (2) is located near the top of the adjusting frame (1); it includes a locking seat (21) detachably connected to the adjusting frame (1), a screw (22) located in the locking seat (21), and locking blocks 1 (23) and 2 (24) located at both ends of the screw (22); Multiple mounting holes (107) for mounting positioning pins (106) are provided on the adjustment frame (1).

2. The adjustable backplate mechanism for a VPX enclosure according to claim 1, characterized in that: Square grooves (211) for locking and guiding the first locking block (23) and the second locking block (24) are provided at both ends of the lock seat (21) along the length direction, and elongated grooves (212) for guiding and limiting the screw (22); each square groove (211) is provided with a first inclined surface (7).

3. An adjustable backplate mechanism for a VPX enclosure according to claim 2, characterized in that: One end of the screw (22) is fitted into the locking block one (23); the other end is connected to the locking block two (24) by a thread; a second inclined surface (8) that fits against the first inclined surface (7) is provided on the locking block one (23) and the locking block two (24).

4. An adjustable backplate mechanism for a VPX enclosure according to claim 1, characterized in that: A first guide groove (104) for mounting the adjuster (5) and a second guide groove (105) for mounting the driver (6) are provided at the top of the adjustment frame (1); the first guide groove (104) is located at the center of the top of the adjustment frame (1); the second guide groove (105) is symmetrically located on both sides of the first guide groove (104).

5. An adjustable backplate mechanism for a VPX enclosure according to claim 4, characterized in that: The adjuster (5) includes an adjusting seat (51) detachably connected to the first guide groove (104), an adjusting pin (52) perpendicularly connected to the adjusting seat (51), an adjusting wheel (53) connected to one end of the adjusting pin (52), a retaining ring (54) disposed on the adjusting pin (52) and connected to the adjusting seat (51), and a set screw (55) for fastening the adjusting wheel (53); the adjusting wheel (53) is disposed outside the first guide groove (104) and connected to the transmission belt (3).

6. An adjustable backplate mechanism for a VPX enclosure according to claim 4, characterized in that: The driver (6) includes a wheel seat (61) detachably connected to the second guide groove (105) and a friction wheel (62) threadedly connected to the wheel seat (61); the friction wheel (62) is located outside the second guide groove (105) and connected to the transmission belt (3).

7. An adjustable backplate mechanism for a VPX enclosure according to claim 1, characterized in that: A pressure roller (9) connected to the transmission belt (3) is also provided on the second end face (102) of the adjustment frame (1); the pressure rollers (9) are arranged in pairs and are respectively located on both sides of the adjuster (5) and the driver (6).

8. An adjustable backplate mechanism for a VPX enclosure according to claim 1, characterized in that: The fixed pulleys (4) are respectively located at the four corners of the adjustment frame (1) and at the bottom center.

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