CN220710819U

CN220710819U - Automatic riveting mechanism and automatic riveting equipment of terminal for TF card seat

Info

Publication number: CN220710819U
Application number: CN202322272825.6U
Authority: CN
Inventors: 周家炜; 周家烨; 许永平
Original assignee: Dongguan Kesheng Electronics Co ltd
Current assignee: Dongguan Kesheng Electronics Co ltd
Priority date: 2023-08-23
Filing date: 2023-08-23
Publication date: 2024-04-02
Anticipated expiration: 2033-08-23

Abstract

The utility model discloses an automatic riveting mechanism of a terminal for a TF (Transflash) card seat, which belongs to the technical field of automatic assembling equipment of the TF card seat and comprises a slideway, a pushing device and a riveting device. According to the utility model, the upper slide way and the lower slide way which are arranged along the Z direction are arranged, and the pushing components are respectively arranged at the sides of the upper slide way and the lower slide way, so that the material belts on the upper slide way and the lower slide way can be synchronously driven to move, and two terminals on the upper slide way and the lower slide way are riveted together through the riveting device, so that manual operation is not needed, the riveting efficiency is high, the quality is stable, the two terminals can be conveniently used as a whole in the subsequent process, the efficiency is improved, the quality is stable, and the production cost is reduced; through setting up the guide slot on last slide and glide slope to articulated terminal surface is inclined plane or curved arm-tie on the push pedal, can be blocked by the clamp plate and block into the locating hole groove or deviate from in it after arm-tie removes one step to pull a material area or put down it, realize synchronous drive material area and the terminal removal on it, simple structure, low in manufacturing cost and be convenient for assemble.

Description

Automatic riveting mechanism and automatic riveting equipment of terminal for TF card seat

Technical Field

The utility model relates to the technical field of automatic TF (Transflash) card holder assembling equipment, in particular to an automatic riveting mechanism and automatic riveting equipment for terminals for TF card holders.

Background

At present, a conducting component on a TF card seat is generally formed by connecting terminals with two structures, and in assembly production, the two terminals are required to be fixed on a rubber core and stable connection of the two terminals is required to be ensured, so that the assembly process is complex and the efficiency is low. At present, an in-mold molding process is adopted to simplify the assembly process, but two terminals are respectively removed from a coiled material belt and put into a plastic mold for molding, so that the molding time is long, and the adverse phenomenon that the molded rubber wraps the terminals and influences the conduction of the terminals can also occur.

Disclosure of Invention

According to the automatic riveting mechanism and the automatic riveting equipment for the terminals for the TF card seat, provided by the utility model, the two material belts can be synchronously driven to synchronously move, the two terminals on the automatic riveting mechanism are riveted together through the riveting device, manual operation is not needed, the riveting efficiency is high, the quality is stable, the two terminals are conveniently used as a whole in the subsequent process, the efficiency is improved, the quality is stable, the production cost is reduced, the structure is simple, the manufacturing cost is low, and the assembly is convenient.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the automatic riveting mechanism of the terminal for the TF card seat is arranged on a frame, an operation table is arranged on the frame, more than one group of coil material feeding mechanisms are arranged beside the operation table, each group of coil material feeding mechanisms can respectively feed two coils of terminal material belt assemblies onto the operation table, each coil of terminal material belt assembly comprises one or two material belts and terminals which are connected onto the terminal material belt assemblies and are arranged along the extending direction of the material belts, and a plurality of positioning hole slots are uniformly arranged on each material belt along the extending direction of the material belt at intervals; the automatic riveting mechanism comprises a slideway, a pushing device and a riveting device, wherein:

the slide way is erected above the operating table and comprises a first mounting plate erected above the Z-direction of the operating table and horizontally arranged, an upper slide way and a lower slide way which extend along the X-direction are respectively arranged on the upper end surface and the lower end surface of the first mounting plate, the upper slide way/the lower slide way are respectively matched with the scattered terminal material belt in a combined way, a pressing plate is respectively arranged above/below the Z-direction at two ends of the upper slide way/the lower slide way, a guide groove which extends along the X-direction is respectively arranged on each pressing plate, and the X-direction length of each guide groove is larger than or equal to the interval between every two adjacent positioning hole grooves on the material belt;

the pushing device is arranged on the first mounting plate and beside the slideway and comprises an upper pushing component and a lower pushing component, wherein the upper pushing component is arranged beside the upper slideway, and the lower pushing component is arranged beside the lower slideway; the upper pushing assembly and the lower pushing assembly comprise a first driving device and pushing plates in transmission connection with the first driving device, the end part of each pushing plate extends to the upper part or the lower part of the two pressing plates on the upper slide way/the lower slide way, and each first driving device can push one pushing plate to move along the X direction through a first transmission device; one or two pull plates arranged along the Y direction are hinged to the end part of each push plate, the end part of each pull plate can pass through one guide groove and extend to one material belt, and the end surface of each pull plate facing the upper slideway/the lower slideway is an inclined surface or a curved surface; each pulling plate can slide along the guide groove under the pushing of one pushing plate so as to drive one material belt to slide on the upper slide way/lower slide way, and can turn upwards/downwards relative to the material belt under the blocking of one pressing plate so as to be separated from one positioning hole groove;

the riveting device is arranged on the operating platform and on the X-direction side of the first mounting plate, and comprises a supporting plate and a pressing block which are arranged along the Z direction: the supporting plate is arranged on the operating platform, and the upper end part of the supporting plate is matched with the terminal material belt group on the lower slide way; the pressing block is arranged above the operating platform, the lower end part of the pressing block is matched with the terminal material belt on the upper slideway, and the pressing block is in transmission connection with a second driving device through a second transmission device and can move along the Z direction under the driving of the second driving device so as to rivet two terminals below the pressing block together and punch and cut the terminals from the material belt.

As a further explanation of the above technical solution:

in the above technical solution, the first transmission device includes first slides that are disposed on the first mounting plate and extend along the X direction, each of the first slides is disposed on one side of the upper slide/lower slide in the Y direction, each of the first slides is slidably provided with a first slide plate that is in transmission connection with the first driving device, each of the first slide plates is provided with a push plate, and each of the push plates has an L-shaped structure; one end part of each push plate extends to the upper part/lower part of the upper slide way/lower slide way, two avoidance grooves which are arranged along the Y direction are formed in the end part of each push plate, rotary parts are arranged on two side walls of each avoidance groove, and one pulling plate is arranged between every two rotary parts.

In the above technical scheme, the pushing device further comprises a synchronizing plate extending in the Z direction, and the synchronizing plate is detachably and fixedly connected with the two first sliding plates.

In the above technical scheme, the second transmission device comprises a transmission shaft which is arranged above the operation table and horizontally arranged, the transmission shaft is in transmission connection with the second driving device and can rotate under the driving of the second driving device, an eccentric wheel is arranged on the transmission shaft, a pressing block is arranged below the Z of the eccentric wheel, and the pressing block is arranged above the operation table in a sliding manner.

In the technical scheme, the pressing block is further hinged with a driving wheel, and the driving wheel is arranged right below the eccentric wheel in the Z direction.

In the above technical solution, each of the first driving devices is a linear motion driving device, and the second driving device is a circular motion driving device.

The other technical scheme adopted by the utility model is as follows:

the automatic riveting equipment comprises the automatic riveting mechanism in the technical scheme, more than one group of slide ways which are arranged along the Y direction and extend along the X direction are arranged on the operation table, one pushing device is arranged beside each group of slide ways, one riveting device is arranged beside each group of slide ways, the upper end parts of the supporting plates are matched with the lower slide ways, and the lower end parts of the pressing blocks are matched with the upper slide ways.

Compared with the prior art, the utility model has the beneficial effects that: the upper slideway and the lower slideway which are arranged along the Z direction and can be respectively matched with the terminal material belt group are arranged, the upper pushing component and the lower pushing component are respectively arranged at the sides of the upper slideway and the lower slideway, the terminal material belt groups on the upper slideway and the lower slideway can be synchronously driven to move, and the two terminals on the upper slideway and the lower slideway are riveted together through the riveting device without manual operation, so that the riveting efficiency is high, the quality is stable, the two terminals can be conveniently used as a whole in the subsequent production or assembly process, the production and assembly efficiency of the TF card seat is improved, the quality is stable, and the production cost is reduced; through setting up the guide slot on last slide and glide slope to articulated the arm-tie that terminal surface is inclined plane or curved surface on the push pedal, can be blocked by the clamp plate after the arm-tie moves forward or retreats a certain distance (one step distance), in order to block into a locating hole groove or deviate from in it, so as to pull a material area or put down it, realize synchronous drive material area and terminal removal on it, simple structure, low in manufacturing cost and be convenient for the assembly.

Drawings

Fig. 1 is a schematic structural view of the present embodiment (only showing the first driving device on one set of pushing devices);

fig. 2 is a schematic structural diagram of another view angle of the present embodiment (only showing the first driving device on one group of pushing devices);

fig. 3 is a schematic structural diagram of a terminal strip assembly in the present embodiment;

FIG. 4 is a schematic view of the first transmission device in the present embodiment;

fig. 5 is an exploded view of the push plate and the pull plate according to the present embodiment.

In the figure: 10. a mounting plate; 20. a material belt; 21. positioning hole slots; 30. a slideway; 31. a slide way is arranged; 32. a glidepath; 33. a pressing plate; 34. a guide groove; 40. a pushing device; 41. the upper pushing component; 42. a pushing-down component; 44. a synchronizing plate; 50. riveting device; 51. a supporting plate; 52. briquetting; 53. a second transmission; 54. a second driving device; 1. a first driving device; 2. a push plate; 201. an avoidance groove; 202. a rotating member; 3. pulling a plate; 4. a first slideway; 5. a first slide plate; 6. a transmission shaft; 7. an eccentric wheel; 8. and a driving wheel.

Detailed Description

The utility model is described in further detail below with reference to the accompanying drawings.

The embodiments described by referring to the drawings are exemplary and intended for purposes of illustrating the present application and are not to be construed as limiting the present application. In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a number", "a plurality" or "a plurality" is two or more, unless explicitly defined otherwise. In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be. In this application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

As shown in fig. 1-2, the automatic riveting mechanism of the terminal for the TF card holder is arranged on a frame, an operation table is arranged on the frame, more than one group of coil feeding mechanisms are arranged beside the operation table, each group of coil feeding machines can respectively feed two coils of terminal material belt combinations onto the operation table, each coil of terminal material belt combination comprises one or two material belts 20 and terminals connected to the material belts and arranged along the extending direction of the material belts, and a plurality of positioning hole grooves 21 are uniformly arranged on each material belt 20 along the extending direction of the material belts at intervals; the automatic riveting mechanism comprises a slideway 30, a pushing device 40 and a riveting device 50.

For the convenience of understanding the present utility model, fig. 2 shows a schematic structure of the terminal strip combination in the present utility model.

As shown in fig. 4, the slide 30 is erected above the operation table, and includes a first mounting plate 10 erected above the operation table Z and horizontally disposed, an upper slide 31 and a lower slide 32 extending along the X direction are respectively disposed on an upper end surface and a lower end surface of the first mounting plate 10, the upper slide 31 and the lower slide 32 are respectively matched with a loose coil of terminal material, a pressing plate 33 is disposed above/below the two ends of the upper slide 31 and the lower slide 32 in the Y direction, a guide groove 34 extending along the X direction is disposed on each pressing plate 33, and the X-direction length of the guide groove 34 is greater than or equal to the distance between two adjacent positioning hole grooves 21 on a material belt 20.

As shown in fig. 4, the pushing device 40 is disposed on the first mounting plate 10 and beside the slideway 30, and includes an upper pushing component 41 and a lower pushing component 42, where the upper pushing component 41 is disposed beside the upper slideway 31, and the lower pushing component 42 is disposed beside the lower slideway 32; the upper pushing assembly 41 and the lower pushing assembly 42 comprise a first driving device 1 and pushing plates 2 in transmission connection with the first driving device, the end part of each pushing plate 1 extends to the upper part/lower part of two pressing plates 33 on the upper slide rail 31/lower slide rail 32, and each first driving device 1 can push one pushing plate 2 to move along the X direction through a first transmission device; one or two pull plates 3 arranged along the Y direction are hinged at the end part of each push plate 2, the end part of each pull plate 3 can pass through a guide groove 34 and extend onto a material belt 20, and the end surface of each pull plate 3 facing the upper slideway 31/the lower slideway 32 is an inclined surface or a curved surface; each of the pulling plates 3 can slide along the guide groove 34 under the pushing of a push plate 2 to drive a material belt 20 to slide on the upper slide rail 31/lower slide rail 32, and can turn upward/downward against the material belt 20 under the blocking of a pressing plate 33 to be released from a positioning hole groove 21.

As shown in fig. 1, the riveting device 50 is provided on the operation table and on the X-direction side of the first mounting plate 10, and includes a stay plate 51 and a pressing block 52 arranged in the Z-direction: the supporting plate 51 is arranged on the operation table, and the upper end part of the supporting plate is matched with the terminal material belt group on the lower slide 32; the pressing block 52 is arranged above the operating platform, the lower end part of the pressing block 52 is matched with the terminal material belt group on the upper slideway 31, the pressing block 52 is in transmission connection with the second driving device 54 through the second transmission device 53 and can move along the Z direction under the driving of the second driving device, so that the two terminals below the pressing block are riveted together and punched from the material belt 20.

According to the utility model, the upper slideway 31 and the lower slideway 32 which are arranged along the Z direction and can be respectively matched with the terminal material belt group are arranged, and the upper pushing component 41 and the lower pushing component 42 are respectively arranged at the side of the upper slideway 31 and the lower slideway 32, so that the terminal material belt on the upper slideway 31 and the lower slideway 32 can be synchronously driven to move in a combined way, and the two terminals on the upper slideway and the lower slideway are riveted together through the riveting device 50, so that manual operation is not needed, the riveting efficiency is high, the quality is stable, the two terminals can be conveniently used as a whole in the subsequent production or assembly process, the production and assembly efficiency of the TF card seat can be improved, the quality is stable, and the production cost is reduced; through setting up the guide slot 34 on last slide 31 and glide slope 32 to articulated terminal surface is inclined plane or curved arm-tie 3 on push pedal 2, can be kept off by clamp plate 33 after arm-tie 3 moves forward or retreats a certain distance (a step), in order to block into one in the locating hole groove or deviate from in it, in order to pull a material area 21 or put down it, realize synchronous drive material area and terminal removal on it, simple structure, low in manufacturing cost and be convenient for the assembly.

In some embodiments of the present utility model, as shown in fig. 4-5, the first transmission device includes first slide ways 1 provided on the first mounting plate 10 and extending along the X direction, each first slide way 4 is provided on one side of the upper slide way 31/lower slide way 32 in the Y direction, each first slide way 4 is slidably provided with a first slide plate 5 in transmission connection with a first driving device 1, each first slide plate 5 is provided with a push plate 2, and each push plate 2 has an L-shaped structure; one end of each push plate 2 extends to the upper side/lower side of the upper slide way 31/lower slide way 32, two avoidance grooves 201 arrayed along the Y direction are arranged at the end of each push plate, rotary members 202 are arranged on two side walls of each avoidance groove 201, and a pull plate 3 is arranged between every two rotary members 202. In this embodiment, the rotating member 202 is a shaft hole or a rotating shaft. In this embodiment, the pushing device 40 further includes a synchronizing plate 44 extending in the Z direction, and the synchronizing plate 44 is detachably and fixedly connected to the two first sliding plates 5

It can be understood that the arrangement of the synchronizing plate 44 can ensure that the two first sliding plates 5 on the upper and lower first sliding ways 4 move synchronously, so as to ensure that the upper and lower material belts 20 can always move in the same direction, ensure that the two terminals on the upper and lower material belts always keep stable relative coordinates and ensure riveting precision.

In this embodiment, the upper slide 31 and the lower slide 32 are further provided with electronic detecting members capable of detecting the positioning hole slots 21 on the material belts 20, so as to ensure that the upper and lower material belts maintain the same initial reference point, and monitor the movement condition of the two material belts by monitoring the conditions of the positioning hole slots 21 on the two material belts 20 in the working process; when any one of the strips 20 is abnormal in movement, a signal is sent to instruct the second driving device 54 to stop driving, and at the same time, instruct the warning device on the frame to send a warning signal.

In some embodiments of the present utility model, as shown in fig. 2, the second transmission device 53 includes a transmission shaft 6 disposed above the operation table and horizontally disposed, the transmission shaft 6 is in transmission connection with the second driving device 54 and can rotate under the driving of the second driving device, an eccentric wheel 7 is disposed on the transmission shaft 6, a pressing block 52 is disposed below the eccentric wheel 7 in the Z direction, and the pressing block 52 is slidingly mounted above the operation table; in the embodiment, the pressing block 52 is also hinged with a driving wheel 8, and the driving wheel 8 is arranged right below the eccentric wheel 7 in the Z direction.

When the riveting machine works, the second driving device drives the transmission shaft 6 to drive the eccentric wheel 7 on the transmission shaft to rotate, the bottom end part of the eccentric wheel 7 pushes the pressing block 52 below the eccentric wheel to slide along the Z direction, and the terminals on the two material belts are riveted together and punched from the material belts.

It will be appreciated that the hinged drive wheel 8 slows down the pressure exerted by the eccentric 7 on the press block 52 when pressed down in the Z-direction, thereby slowing down the speed of pressing down the press block 52, avoiding crushing the terminals or reducing the chance of crushing them.

In the present embodiment, each of the first driving devices 1 is a linear motion driving device, and the second driving device 54 is a circular motion driving device.

As a specific application embodiment of the above embodiment, an automatic riveting device includes the automatic riveting mechanism in the above embodiment, a set of more than one slide ways 30 arranged along the Y direction and extending along the X direction are provided on the operation table, a pushing device 40 is provided on the Y-direction side of each set of slide ways 30, a riveting device 50 is provided on the Y-direction side of several slide ways 30, the upper ends of the supporting plates 51 are adapted to several lower slide ways 32, and the lower ends of the pressing blocks 52 are adapted to several upper slide ways 31.

As shown in fig. 1 and 4, in this embodiment, two sets of slide ways 30 are erected on the mounting board 10, and two pairs of terminals can be simultaneously formed by one riveting action of the riveting device 50, so that the efficiency is higher, and the production cost can be further reduced.

The above description should not be taken as limiting the scope of the utility model, and any modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present utility model still fall within the scope of the technical solutions of the present utility model.

Claims

An automatic riveting mechanism of a terminal for a TF card seat is arranged on a rack, an operation table is arranged on the rack, more than one group of coil material feeding mechanisms are arranged beside the operation table, each group of coil material feeding mechanisms can respectively feed two coils of terminal material belt combinations onto the operation table, each coil of terminal material belt combination comprises one or two material belts and terminals which are connected to the terminal material belts and are arranged along the extending direction of the material belts, and a plurality of positioning hole slots are uniformly arranged on each material belt along the extending direction of the material belts at intervals; the automatic riveting mechanism is characterized by comprising a slideway, a pushing device and a riveting device, wherein:

the slide way is erected above the operating table and comprises a first mounting plate erected above the Z-direction of the operating table and horizontally arranged, an upper slide way and a lower slide way which extend along the X-direction are respectively arranged on the upper end surface and the lower end surface of the first mounting plate, the upper slide way/the lower slide way are respectively matched with the scattered terminal material belt in a combined way, a pressing plate is respectively arranged above/below the Z-direction at two ends of the upper slide way/the lower slide way, a guide groove which extends along the X-direction is respectively arranged on each pressing plate, and the X-direction length of each guide groove is larger than or equal to the interval between every two adjacent positioning hole grooves on the material belt;

the pushing device is arranged on the first mounting plate and beside the slideway and comprises an upper pushing component and a lower pushing component, wherein the upper pushing component is arranged beside the upper slideway, and the lower pushing component is arranged beside the lower slideway; the upper pushing assembly and the lower pushing assembly comprise a first driving device and pushing plates in transmission connection with the first driving device, the end part of each pushing plate extends to the upper part or the lower part of the two pressing plates on the upper slide way/the lower slide way, and each first driving device can push one pushing plate to move along the X direction through a first transmission device; one or two pull plates arranged along the Y direction are hinged to the end part of each push plate, the end part of each pull plate can pass through one guide groove and extend to one material belt, and the end surface of each pull plate facing the upper slideway/the lower slideway is an inclined surface or a curved surface; each pulling plate can slide along the guide groove under the pushing of one pushing plate so as to drive one material belt to slide on the upper slide way/lower slide way, and can turn upwards/downwards relative to the material belt under the blocking of one pressing plate so as to be separated from one positioning hole groove;

the riveting device is arranged on the operating platform and on the X-direction side of the first mounting plate, and comprises a supporting plate and a pressing block which are arranged along the Z direction: the supporting plate is arranged on the operating platform, and the upper end part of the supporting plate is matched with the terminal material belt group on the lower slide way; the pressing block is arranged above the operating platform, the lower end part of the pressing block is matched with the terminal material belt on the upper slideway, and the pressing block is in transmission connection with a second driving device through a second transmission device and can move along the Z direction under the driving of the second driving device so as to rivet two terminals below the pressing block together and punch and cut the terminals from the material belt.
2. The automatic riveting mechanism according to claim 1, wherein the first transmission device comprises first slide ways which are arranged on the first mounting plate and extend along the X direction, each first slide way is arranged on one Y-direction side of the upper slide way/lower slide way, each first slide way is slidably provided with a first slide plate which is in transmission connection with one first driving device, each first slide plate is provided with one pushing plate, and each pushing plate is of an L-shaped structure; one end part of each push plate extends to the upper part/lower part of the upper slide way/lower slide way, two avoidance grooves which are arranged along the Y direction are formed in the end part of each push plate, rotary parts are arranged on two side walls of each avoidance groove, and one pulling plate is arranged between every two rotary parts.
3. The automatic riveting mechanism of claim 2, wherein the pushing device further comprises a synchronizing plate extending in the Z direction, and the synchronizing plate is detachably and fixedly connected with the two first sliding plates.
4. The automatic riveting mechanism according to claim 1, wherein the second transmission device comprises a transmission shaft which is arranged above the operation table and is horizontally arranged, the transmission shaft is in transmission connection with the second driving device and can rotate under the driving of the second driving device, an eccentric wheel is arranged on the transmission shaft, a pressing block is arranged below the eccentric wheel in a Z direction, and the pressing block is arranged above the operation table in a sliding manner.
5. The automatic riveting mechanism according to claim 4, wherein the pressing block is further hinged with a driving wheel, and the driving wheel is arranged right below the eccentric wheel in the Z direction.
6. The automatic riveting mechanism of claim 1, wherein each of the first driving means is a linear motion driving means and the second driving means is a circular motion driving means.
7. The automatic riveting equipment is characterized by comprising the automatic riveting mechanism as claimed in any one of claims 1-6, wherein more than one group of slide ways which are arranged along the Y direction and extend along the X direction are arranged on the operation table, the pushing device is arranged beside each group of slide ways along the Y direction, one riveting device is arranged beside each group of slide ways along the Y direction, the upper end parts of the supporting plates are matched with the lower slide ways, and the lower end parts of the pressing blocks are matched with the upper slide ways.